Automobile fan control housing

Abstract

This utility model relates to the field of automotive fan housing technology, and discloses an automotive fan control housing, including an upper housing and a lower housing, which are connected by screws to form a closed cavity. Sealing grooves are provided on the mating edges for accommodating waterproof sealing rings. The lower housing has multiple inclined airflow channels, with water-limiting ribs at the inlets and ventilation grilles at the outlets, forming a flow-guiding structure with both waterproof and heat dissipation functions. Multiple buffer support pillars are provided inside the lower housing, each with an elastic washer at the top to support the control circuit board and absorb vibration impacts. An integrally formed heat dissipation rib structure is provided on the top and sides of the housing to improve natural convection heat dissipation efficiency. This utility model solves the technical problem of existing fan controllers having imperfect waterproof sealing structures and being easily damaged by water in high-humidity environments.

Description

Technical Field

[0001] This utility model relates to the field of automotive fan technology, specifically to an automotive fan control housing. Background Technology

[0002] As a crucial electronic component in the automotive engine cooling system, the fan controller operates under the high-temperature, high-humidity, and high-vibration environment of the engine compartment, placing high demands on its structural sealing performance. In existing technologies, fan controller housings generally employ a mating upper and lower shell structure. However, due to the lack of effective sealing at the shell joints, moisture can easily seep in during conditions such as vehicle wading through water, car washing, or heavy rain. This can lead to moisture and corrosion of the internal control circuit board, ultimately causing electrical faults or system failure.

[0003] To improve the reliability of fan controllers in humid and hot environments, some existing solutions attempt to improve the system by adding sealing rings to the edge of the housing. However, due to poor structural fit and insufficient sealing ring compression, the risk of water ingress cannot be completely eliminated. In addition, although some products have basic heat dissipation and shock resistance functions, their designs have not been systematically optimized around waterproof sealing, resulting in limited overall protection capabilities. Utility Model Content

[0004] The purpose of this invention is to provide an automotive fan control housing to solve the problems mentioned in the background art.

[0005] To address the aforementioned technical problems, this utility model provides an automotive fan control housing, comprising an upper housing and a lower housing, which are connected by screws to form a closed cavity. Sealing grooves are provided at the mating edges of the upper and lower housings to accommodate waterproof sealing rings. The lower housing has multiple inclined flow channels, with water-limiting ribs at the inlets and ventilation grilles at the outlets, forming a flow channel structure with both waterproof and heat dissipation functions. Multiple buffer support pillars are located inside the lower housing, each with an elastic washer at its top to support the control circuit board and absorb vibration impacts. An integrally formed heat dissipation rib structure is provided on the top and sides of the housing to improve natural convection heat dissipation efficiency.

[0006] In one possible implementation, the upper housing is provided with several positioning posts, and the lower housing is provided with positioning holes that mate with them for assembly and alignment.

[0007] In one possible implementation, a snap-fit ​​structure is also provided between the upper and lower housings to assist in positioning and enhance connection stability.

[0008] In one possible implementation, the lower housing has a plurality of mounting lugs on its exterior, each mounting lug having a through hole and a shock-absorbing pad around the through hole.

[0009] In one possible implementation, the airflow channel has a rectangular cross-section structure, is arranged at an angle along the vehicle's direction of travel, and is connected to the ventilation grille.

[0010] In one possible implementation, the heat dissipation fins are arranged parallel to the direction of the airflow channel, and the spacing between each heat dissipation fin is uniform.

[0011] In one possible implementation, the buffer support column is a hollow column structure, and an elastic washer is disposed in the inner groove at the top of the hollow column.

[0012] In one possible implementation, the sealing ring is an annular rubber ring with an elliptical cross-section, which fits tightly against the sealing groove.

[0013] In one possible implementation, the shell is integrally injection molded from reinforced flame-retardant nylon material, which has high temperature resistance and impact resistance.

[0014] In one possible implementation, the inner surface of the lower housing is further provided with a number of mounting holes for fixing the circuit board, and each mounting hole is provided with a corresponding buffer support column.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides an automotive fan control housing. By connecting the upper and lower housings with screws to form a closed cavity, and providing sealing grooves at the mating edges to accommodate waterproof sealing rings, a compact housing assembly with excellent sealing performance is achieved. The lower housing has multiple airflow channels with water-limiting ribs at the inlet and ventilation grilles at the outlet, ensuring ventilation and heat dissipation while effectively preventing moisture ingress, achieving a balance between heat dissipation and waterproofing. Furthermore, multiple buffer support pillars are installed inside the lower housing, with elastic washers on their tops, providing good support and cushioning vibration reduction during circuit board installation. Combined with the integrated heat dissipation fin structure on the exterior of the housing, the overall natural convection heat dissipation efficiency is further improved. This effectively addresses the shortcomings of existing automotive fan controller housings in terms of sealing performance, protection level, heat dissipation efficiency, and vibration resistance, enhancing the overall stability and reliability of the system. Attached Figure Description

[0016] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the upper and lower housings of this utility model. Figure 3 This is the left view of the present invention; Figure 4 This is a partially enlarged view of the lower shell of this utility model.

[0017] In the diagram: 1. Upper housing; 2. Lower housing; 3. Screw; 5. Waterproof sealing ring; 6. Flow channel; 9. Buffer support column; 10. Elastic washer; 14. Positioning hole; 15. Snap-fit ​​structure; 16. Mounting lug; 17. Through hole; 18. Shock-absorbing rubber pad. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 4A car fan control housing includes an upper housing 1 and a lower housing 2, wherein the upper housing 1 and the lower housing 2 are connected by a plurality of screws 3. Specifically, the screws 3 pass through through holes at corresponding positions on the edge of the upper housing 1 and are screwed into threaded holes on the lower housing 2, ensuring a fixed connection between the upper and lower housings and forming a closed cavity. To ensure a sealed interior, continuous sealing grooves are provided on the mating edges of the upper housing 1 and the lower housing 2. These sealing grooves are integrally formed as grooves during the injection molding process of the housing, and their depth and width are designed according to the specifications of the selected sealing ring, specifically to match a waterproof sealing ring. The elliptical cross-section of the 5-inch waterproof sealing ring is made of elastic rubber and has a continuous annular structure. During installation, it is pressed into the sealing groove to form a seal when the shell is closed, preventing moisture from entering the internal circuit space. The lower shell 2 has multiple flow channels 6, each with an inclination angle between 10° and 30° relative to the bottom surface of the shell. The flow channels 6 are arranged at an angle along the vehicle's direction of travel, and their inlet ends are equipped with water-limiting ribs. The water-limiting ribs are raised rib structures perpendicular to the flow direction and are injection molded onto the front edge of the inlet of the flow channel to block rainwater or splashes. Direct water ingress is prevented; the outlet of the flow channel 6 is connected to the ventilation grille, which adopts a parallel strip structure with a spacing between the strips controlled between 1mm and 2mm. This allows air to flow out while preventing large water droplets from entering, forming a flow channel structure that combines waterproofing and heat dissipation. Multiple buffer support columns 9 are evenly distributed inside the lower shell 2. The support columns 9 are solid or hollow column structures, integrally injection molded with the lower shell 2 during molding, forming a flat platform on top. Each buffer support column 9 has an elastic washer 10 on its top, which is made of silicone rubber. With a thickness of 1mm to 3mm, it is fixed to the top of the column by means of slots or adhesive to support the control circuit board and absorb the vibration and impact generated during vehicle operation to prevent damage to the circuit board. In addition, in order to improve the overall heat dissipation performance of the housing, multiple heat dissipation rib structures are provided on the top and left and right sides of the upper housing 1. The heat dissipation ribs are integrally formed convex strip structures, with the direction consistent with the vehicle's wind direction or airflow direction, the spacing between them is between 2mm and 5mm, and the depth is between 3mm and 6mm. By increasing the outer surface area, the heat exchange capacity with the air is improved, thereby improving the natural convection heat dissipation efficiency.

[0020] As a preferred embodiment, the upper housing 1 is provided with several positioning posts, and the lower housing 2 is provided with corresponding positioning holes 14. The positioning posts are columnar protrusions, integrally formed on the inner edge region of the upper housing 1 using a mold. The diameter of the posts is 2mm to 4mm, and the height is 5mm to 8mm, serving as guides for alignment during assembly. The positioning holes 14 are blind or through holes that strictly correspond to the size and position of the positioning posts, located on the inner edge of the lower housing 2, achieved by creating grooves in the mold. During assembly, the positioning posts are inserted into the positioning holes 14, ensuring complete horizontal alignment of the upper housing 1 and lower housing 2, preventing assembly misalignment or twisting, and effectively improving the positioning accuracy of the overall housing structure. This structure is determined during the injection molding stage by precisely controlling the spacing and number of positioning posts and positioning holes 14. Typically, two to four symmetrically arranged positioning structures are used to ensure sufficient alignment accuracy without affecting the installation position of the screws 3 and the complete pressing area of ​​the sealing ring 5. This structure requires no additional assemblies, utilizing the housing material itself for molding, resulting in good structural stability and high repeatability.

[0021] As a preferred embodiment, a snap-fit ​​structure 15 is also provided between the upper housing 1 and the lower housing 2. The snap-fit ​​structure 15 consists of multiple male and female snaps. The male snaps are located on the inner edge of the upper housing 1, and the female snaps are located at corresponding positions on the lower housing 2. The two are integrally formed during the manufacturing stage using an injection mold. The male snaps are elastic tooth structures with outwardly expanding locking ends, and the female snaps are limiting holes with snap-fit ​​bevels. During assembly, the male snaps are pressed into the female snaps, and the teeth automatically engage with the inner wall of the limiting holes, achieving an auxiliary fixing function and enhancing the initial positioning accuracy and connection stability during assembly. The snap-fit ​​structure is staggered from the screws 3, and is usually arranged symmetrically at the four corners to prevent misalignment or warping of the upper housing 1 and the lower housing 2 before the screws are tightened.

[0022] As a preferred embodiment, the lower housing 2 is provided with multiple mounting lugs 16 on its exterior. Each mounting lug 16 is a plate-like extension structure that expands outward along the edge of the housing and is integrally formed with the housing during the injection molding stage. It has a thickness of 2mm to 4mm and a through hole 17 on its outer side. The through hole 17 is a circular through hole for installing fixing bolts, with a diameter of 5mm to 8mm. Vibration-damping pads 18 are provided around the through holes 17. These pads are prefabricated elastic rubber parts that are adhered to or embedded in the grooves of the mounting lugs 16 during housing assembly. They buffer vibrations of the housing during installation, prevent resonance and structural fatigue, and improve the overall impact resistance of the machine during vehicle operation.

[0023] As a preferred example, the airflow channel 6 has a rectangular cross-section structure with a width of 5mm to 10mm and a height of 3mm to 6mm. It is formed by molding and the airflow channel 6 is inclined along the vehicle's driving direction with an inclination angle of 15° to 25°. This structure allows air to flow naturally along the direction of the airflow channel as the vehicle moves forward. The channel outlet is directly connected to the ventilation grille without the need for connecting parts, forming an integrated ventilation path that ensures smooth airflow and high heat dissipation efficiency.

[0024] As a preferred embodiment, based on the automotive fan control housing, the arrangement direction of the heat dissipation fins is consistent with the direction of the airflow channel 6, i.e., all arranged along the vehicle's driving direction, to reduce airflow interference and improve natural convection. Each heat dissipation fin has a height of 3mm to 6mm and a width of 1mm to 2mm, with the spacing between multiple fins remaining consistent, controlled between 2mm and 4mm, ensuring a stable airflow channel is formed when air flows through, improving heat dissipation efficiency without affecting the overall structural strength of the housing.

[0025] As a preferred example, the buffer support column 9 adopts a hollow column structure with an inner diameter of 2mm to 4mm, an outer diameter of 6mm to 10mm, and a height of 10mm to 15mm. It is integrally molded during injection molding. The hollow structure reduces weight and enhances elastic cushioning capacity. The elastic washer 10 is set in the inner groove at the top of the support column. The groove is approximately 1mm to 2mm deep and slightly wider than the washer thickness by 0.2mm to 0.5mm. The washer is fixed by embedding or adhesive, which can effectively support the circuit board and absorb some energy under mechanical impact, reducing vibration transmission.

[0026] As a preferred example, the waterproof sealing ring 5 is an annular rubber ring with an elliptical cross-section, a major axis diameter of 3mm to 5mm, and a minor axis diameter of 2mm to 3mm. This sealing ring is made of highly elastic rubber material, with a temperature resistance range of -40°C to +120°C. During assembly, it is pressed into the sealing groove between the upper housing 1 and the lower housing 2, and after being locked by screws 3, it forms a continuous and uniformly stressed seal, ensuring that moisture cannot penetrate into the sealed cavity.

[0027] As a preferred example, the entire shell is integrally injection molded from reinforced flame-retardant nylon material (such as PA66+30%GF V0 grade). This material has good high-temperature resistance (continuous use temperature greater than 120°C) and impact resistance (impact strength greater than 8kJ / m). 2 In the injection molding process, material is injected into the mold cavity under high temperature and high pressure conditions to form a seamless upper shell 1 and lower shell 2 structure, avoiding the structural weaknesses that exist in welding or gluing processes, and improving the reliability and service life of the shell in high temperature, high humidity and high vibration environments.

[0028] As a preferred embodiment, the inner surface of the lower housing 2 is provided with several mounting holes for fixing the circuit board. Each mounting hole has a diameter of 2mm to 3mm, and their positions correspond one-to-one with the buffer support pillars 9. These holes are used to insert screws and fix the circuit board to the elastic washer 10 on top of the buffer support pillar 9. The mounting holes are formed by mold design during injection molding, with smooth edges to prevent screw jamming or circuit board damage during installation. This fixing method provides stable support for the circuit board, while the elastic washer provides shock absorption protection. Its overall structure comprises an upper shell and a lower shell, connected by screws to form a closed cavity, and combined with a sealing groove and a waterproof sealing ring to form a waterproof sealing structure. During assembly, the upper and lower shells are first precisely aligned using multiple positioning posts and corresponding positioning holes on the edges, with the aid of a snap-fit ​​structure for initial positioning. Then, screws are used to secure them along the designated holes, forming a complete and reliably sealed cavity shell. The shell material is reinforced flame-retardant nylon, integrally molded during injection molding, ensuring good stability and durability of the shell under high temperature, high humidity, and vibration environments.

[0029] In the static state of the equipment, the control circuit board is installed inside the lower housing, forming contact support with the elastic washers at the top of multiple buffer support columns. The buffer support columns have a hollow structure with grooves at the top for embedding the elastic washers, forming a shock-absorbing support system. The circuit board is fixed to the mounting holes with screws, and the mounting holes correspond one-to-one with the support columns. During vehicle operation, external vibrations and impacts are transmitted to the outer shell, but the compression of the elastic washers and the elastic deformation of the support columns work together to effectively absorb some of the energy, reducing the direct transmission of vibration to the circuit board and preventing problems such as solder joint cracking and component loosening.

[0030] During dynamic operation, the airflow generated by the vehicle's movement flows along the vehicle body. Air first enters through the inclined airflow channel inlet on the lower shell. This channel has a rectangular cross-section and features a limited water-retaining structure at the inlet to prevent rainwater and mud from directly entering the channel. The air then flows along the inclined channel to the ventilation grilles, which are arranged in a parallel, spaced pattern, allowing air to escape freely while blocking large water droplets or foreign objects from entering. The entire channel system, under the influence of natural airflow, creates a negative pressure ventilation effect, effectively carrying away heat from the enclosed cavity and forming an air convection path.

[0031] In this process, heat dissipation fins play a crucial role. They are arranged on the top and sides of the upper shell, aligned with the airflow channels, and spaced evenly. As air passes over the shell surface, they expand the heat exchange area, improving the heat exchange efficiency between the shell and the flowing air, thereby accelerating heat dissipation from the shell surface. Heat is conducted from the inside to the shell surface through the excellent thermal conductivity of nylon, and then exhausted into the outside air through natural convection or forced convection driven by vehicle movement.

[0032] The housing is fixedly connected to the vehicle through multiple mounting lugs. Each mounting lug has a through hole for fastening and is supplemented with shock-absorbing pads to absorb vibrations transmitted by the vehicle's body structure, further enhancing the structural stability and impact resistance of the housing under actual working conditions.

[0033] Throughout the entire operation, the various structural features work synergistically: the enclosed cavity ensures the circuit board is protected from external dust and moisture; the airflow channels and ventilation grilles form a passive ventilation path, working in conjunction with heat dissipation fins to improve heat dissipation efficiency; the buffer support system provides stable suspension and vibration protection for the circuit board; the snap-fit ​​and positioning structures enhance assembly consistency; and the shock-absorbing pads ensure the housing is securely and reliably fixed. These systems work in tandem to continuously ensure the normal operation and long-term reliability of the electronic units in complex environments such as vibration, high temperature, and humidity during the operation of the automotive fan control system.

[0034] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. A car fan control housing, characterized in that, The device includes an upper shell (1) and a lower shell (2), which are connected by screws (3) to form a closed cavity. The mating edges of the upper shell (1) and the lower shell (2) are provided with sealing grooves for placing waterproof sealing rings (5). The lower shell (2) is provided with multiple inclined flow channels (6), with water-limiting ribs at the inlet and ventilation grilles at the outlet, to form a flow channel structure with both waterproof and heat dissipation functions. The lower shell (2) is provided with multiple buffer support columns (9), and each buffer support column (9) is provided with an elastic washer (10) at the top to support the control circuit board and absorb vibration impact. The top and sides of the shell are provided with an integrally formed heat dissipation rib structure to improve the efficiency of natural convection heat dissipation.

2. The automotive fan control housing according to claim 1, characterized in that, The upper housing (1) is provided with several positioning posts, and the lower housing (2) is provided with positioning holes (14) that cooperate with it for assembly and alignment.

3. The automotive fan control housing according to claim 1, characterized in that, A snap-fit ​​structure (15) is also provided between the upper housing (1) and the lower housing (2) to assist in positioning and enhance connection stability.

4. The automotive fan control housing according to claim 1, characterized in that, The lower housing (2) is provided with a plurality of mounting lugs (16) on the outside, each mounting lug (16) is provided with a through hole (17), and a shock-absorbing pad (18) is provided around the through hole (17).

5. The automotive fan control housing according to claim 1, characterized in that, The flow channel (6) has a rectangular cross-section structure, is arranged at an angle along the vehicle's driving direction, and is connected to the ventilation grille.

6. The automotive fan control housing according to claim 1, characterized in that, The heat dissipation fins are arranged in a direction parallel to the direction of the flow channel (6), and the spacing between each heat dissipation fin is uniform.

7. The automotive fan control housing according to claim 1, characterized in that, The buffer support column (9) is a hollow column structure, and the elastic washer (10) is set in the inner groove at the top of the hollow column.

8. The automotive fan control housing according to claim 1, characterized in that, The waterproof sealing ring (5) is an annular rubber ring with an elliptical cross-section, and it fits tightly with the sealing groove.

9. The automotive fan control housing according to claim 1, characterized in that, The shell is integrally injection molded from reinforced flame-retardant nylon material for high temperature resistance and impact resistance.

10. The automotive fan control housing according to claim 1, characterized in that, The inner surface of the lower housing (2) is also provided with a number of mounting holes for fixing the circuit board, and each mounting hole is provided corresponding to the buffer support column (9).

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