PWM (Pulse Width Modulation) fan speed regulation module structure based on hold-down mechanism

Abstract

The utility model relates to a PWM fan speed regulation module structure based on a hold-down mechanism, which comprises a PCBA assembly, the PCBA assembly comprises a plurality of electronic components, the structure also comprises a hold-down mechanism, the hold-down mechanism is installed on the PCBA assembly, the hold-down mechanism comprises a connecting sheet and a hold-down protection unit, the connecting sheet is connected with the hold-down protection unit, and the hold-down protection unit is connected with the PCBA assembly. The pressing protection unit is installed on an electronic component and used for pressing and protecting different electronic components. According to the utility model, the sealing ring, the pressing protection mechanism and the upper cover are subjected to secondary molding and combined into a whole, so that the sealing protection of the whole module and the pressing and fixing effect on the PCBA assembly are realized, the blocking among main electronic components is completed, and the mutual interference among the electronic components when the module works is prevented; the purposes of simplified structure, reduced parts, efficient assembly, stable performance and the like are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan speed regulation module technical field especially is based on PWM fan speed regulation module structure of pressing mechanism. BACKGROUND

[0002] The vehicle speed regulation module is a kind of fan control electrical device for realizing air-conditioner fan air volume and speed control by adjusting fan power supply voltage and current, and is used to adjust the air speed of automobile air-conditioner blower.The existing PWM conventional speed regulation module structure has a series of assembly inconvenience, many parts, complex process, high cost and design defects of lacking function.

[0003] The patent with the publication number CN113982983A discloses a PWM fan speed regulation module structure, which comprises a cover, a circuit board, heat-conducting silica gel and a radiator.The heat-conducting silica gel is coated on the heat-conducting surface of the radiator, the circuit board is placed behind the radiator and then loaded into the cover, and the pins of the circuit board pass through the corresponding plug hole of the cover.The patent combines the elastic body and the cover by secondary molding, lacks pressing protection for the main electronic components on the PCBA board and has poor vibration resistance.

[0004] Therefore, a PWM fan speed regulation module structure is provided, which can realize pressing protection for resistor and improve vibration resistance. UTILITY MODEL CONTENTS

[0005] The utility model discloses a kind of PWM fan speed regulation module structures based on pressing mechanism to overcome the defects of the above prior art.

[0006] The purpose of the utility model can be realized by the following technical solutions:

[0007] According to one aspect of the utility model, a PWM fan speed regulation module structure based on pressing mechanism is provided, comprising a PCBA assembly, the PCBA assembly includes various electronic components, the structure further includes a pressing mechanism, the pressing mechanism is installed on the PCBA assembly, the pressing mechanism includes a connecting sheet and a pressing protection unit, the connecting sheet is connected with the pressing protection unit, the pressing protection unit is installed on electronic component, and different electronic components are pressed and protected.

[0008] As a preferred technical solution, the pressing mechanism is made of TPE thermoplastic elastomer material.

[0009] As a preferred technical solution, the pressing protection unit includes a sleeve type protective sleeve and an annular pressing sleeve.

[0010] As a preferred technical solution, the structure further comprises an upper cover (1) and a sealing ring (5), and the sealing ring, the pressing mechanism and the upper cover are combined into one body by secondary molding.

[0011] As a preferred technical solution, the structure further includes a radiator, the radiator is provided with a triangular fixing block, the upper cover is provided with a hook, and the triangular fixing block and the hook are connected.

[0012] As a preferred technical solution, the structure further includes a two-component thermal conductive adhesive, which is installed on the heat sink.

[0013] As a preferred technical solution, the PCBA assembly includes a PCB board, the PCB board is provided with a limiting hole, and the radiator is further provided with a positioning column, and the limiting hole and the positioning column are connected.

[0014] As a preferred technical solution, the structure further includes two screw assembly slots, which are mounted on the upper cover, and the upper surfaces of the screw assembly slots are inclined.

[0015] As a preferred technical solution, the upper surface of the screw assembly groove is relatively inclined.

[0016] As a preferred technical solution, the structure further includes a fan volute and screws. The fan volute is provided with a mounting post, and the mounting post and the screw assembly groove are connected by screws.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The sealing ring, the compression protection mechanism and the upper cover are combined into one body by secondary molding in this utility model, which realizes the sealing protection of the entire module, the compression and fixing effect of the PCBA assembly, and the barrier between the main electronic components, thereby preventing the mutual interference between the electronic components when the module is working. It also achieves the goals of streamlined structure, reduced parts, efficient assembly and stable performance.

[0019] 2. The upper cover of the utility model is assembled with the fan volute by two screws, and the upper surface of the screw assembly groove adopts an inclined surface design to ensure that when the module is assembled with the fan volute, the downward locking force of the screw is perpendicular to the installation column of the fan volute, so that it can better fit the installation characteristics of the fan volute, and is more flexible and reliable.

[0020] 3. The utility model uses a two-component thermal conductive adhesive, which has a better gap filling effect between the PCB board and the radiator, and has the advantages of fast heat conduction, good reliability and low cost.

[0021] 4. The upper cover of the utility model is provided with a hook, and the radiator is provided with a triangular fixing block. The upper cover is pressed closed by a press so that the hook of the upper cover is firmly fastened to the triangular fixing block of the radiator to complete the assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the explosion structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the upper cover of the utility model;

[0024] Figure 3 This is a structural diagram of the compacting mechanism of the utility model;

[0025] Figure 4 It is a top view of the pressing mechanism of the utility model;

[0026] Figure 5 This is a schematic diagram of filling the double-group thermal conductive adhesive of the utility model;

[0027] Figure 6 This is a schematic diagram of the distribution of electronic components of the utility model;

[0028] Figure 7 This is a structural diagram of the screw assembly slot of the utility model;

[0029] Figure 8 This is a schematic diagram of the installation of the screw assembly slot of the utility model;

[0030] Figure 9 This is a schematic diagram of the appearance of the utility model.

[0031] 1. Top cover; 2. PCBA assembly; 3. Two-component thermal adhesive; 4. Radiator; 5. Sealing ring; 6. Clamping mechanism; 7. Screw assembly slot; 8. Screw; 9. Mounting column; 10. Fan volute. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0033] An automotive speed control module is an electrical device that adjusts the blower's air volume and speed by adjusting the blower's supply voltage and current. Existing conventional PWM speed control modules suffer from a number of design flaws, including inconvenient assembly, a large number of components, complex manufacturing processes, high costs, and limited functionality.

[0034] The purpose of this utility model is to improve the assembly efficiency of the PWM module, enhance the protection performance, shock resistance, anti-interference performance, reduce the number of parts, reduce costs, and improve the function. It is to overcome the design defects of the existing PWM conventional speed control module structure, such as the inconvenience of assembly, the large number of parts, complex process, high cost, and lack of function. The existing assembly is cumbersome and difficult, the assembly is blocked, the parts structure is complex, the mold cost is too high, the protection function is insufficient, the anti-interference performance is poor, and the heat dissipation requirements are not met.

[0035] Therefore, the present invention provides a PWM fan speed control module structure based on a clamping mechanism; the sealing ring, the clamping protection mechanism and the upper cover of the utility model are combined into one by secondary molding, which realizes the sealing protection of the entire module, the clamping and fixing effect on the PCBA assembly, and the barrier between the main electronic components, and prevents the mutual interference between the electronic components when the module is working; it realizes the goals of simplified structure, reduced parts, efficient assembly, and stable performance. The upper cover of the utility model is assembled with two screws, and the upper surface of the screw assembly groove adopts an inclined surface design to ensure that when the module is assembled with the fan volute, the downward locking force of the screw is perpendicular to the installation column of the fan volute, so that it can better fit the installation characteristics of the fan volute, and is more flexible and reliable. The utility model uses a two-component thermal conductive adhesive, which has a better gap filling effect between the PCB board and the radiator, and has the advantages of fast heat conduction, good reliability and low cost. The upper cover of the utility model is provided with a hook, and the radiator is provided with a triangular fixing block. The upper cover is pressed closed by a press so that the hook of the upper cover is firmly buckled with the triangular fixing block of the radiator to complete the assembly.

[0036] Example 1

[0037] like Figures 1-6 As shown, a PWM fan speed control module structure based on a clamping mechanism includes a PCBA assembly 2, which includes a variety of electronic components. The structure also includes a clamping mechanism 6, which is installed on the PCBA assembly 2. The clamping mechanism 6 includes a connecting piece and a clamping protection unit. The connecting piece and the clamping protection unit are connected. The clamping protection unit is installed on the electronic component and is used to compress and protect different electronic components.

[0038] The pressing mechanism 6 is made of TPE thermoplastic elastomer material.

[0039] The compression protection unit includes a sleeve-type protection sleeve and an annular compression sleeve.

[0040] The structure further comprises an upper cover 1 and a sealing ring 5 , wherein the sealing ring 5 , the pressing mechanism 6 and the upper cover 1 are integrated into one body by secondary molding.

[0041] The structure further includes a radiator 4, the radiator 4 is provided with a triangular fixing block, the upper cover 1 is provided with a hook, and the triangular fixing block and the hook are connected.

[0042] The structure further includes a two-component thermal conductive adhesive 3 , which is mounted on the heat sink 4 .

[0043] The PCBA assembly 2 includes a PCB board, the PCB board is provided with a limiting hole, and the radiator is further provided with a positioning column, and the limiting hole and the positioning column are connected.

[0044] In this embodiment, a two-component thermally conductive adhesive 3 is first applied to the corresponding heat conduction surface of the heat sink 4 using a dual-channel hybrid automatic dispensing machine. Then, the PCBA assembly 2 is placed, and when placing it, it is important to align the limiting holes of the PCB board with the positioning posts of the PCB board on the heat sink 4. Then, the upper cover 1 is inserted, and when inserting it, it is important to ensure that the pins of the circuit board pass through the corresponding insertion holes in the upper cover 1. Finally, the upper cover 1 is pressed closed with a press, so that the hooks of the upper cover 1 firmly engage the triangular fixing blocks of the heat sink 4 to complete the assembly.

[0045] The upper cover 1 is designed using a two-stage injection molding process. The sealing ring 5 and the clamping mechanism 6 of the PCBA assembly 2 are designed using TPE thermoplastic elastomer material and are directly integrated into the upper cover through the secondary injection molding process. The clamping mechanism 6 is designed based on the spacing and size of the main electronic components and is designed with anti-interference barriers in mind. After the upper cover 1 is fastened to the heat sink 4, the molded elastomer material provides overall sealing protection for the module, clamps and secures the PCBA assembly 2, and isolates the main electronic components, preventing mutual interference during module operation. This design features a streamlined structure, a small number of parts, efficient assembly, and stable performance. The cylindrical shape of the electronic components necessitates a sleeve-type protective structure to protect them from vibration. According to the shape, height and distribution of other types of electronic components, an annular clamping structure is designed to ensure that the electronic components are evenly stressed. When the upper cover 1 and the radiator 4 are buckled together, the above clamping protection structure can effectively make the entire PCBA assembly 2 flat on the radiator, thereby ensuring the heat transfer of the PCBA assembly 2. The entire clamping structure always maintains a certain elasticity, avoiding rigid stress on the electronic components and more effectively protecting the PCBA assembly 2.

[0046] A heat dissipation surface is added to the bottom of the PCB board, and a two-component thermal conductive adhesive 3 is used in combination. The two-component thermal conductive adhesive 3 has a better gap filling effect between the PCB board and the heat sink 4, and has the advantages of fast heat conduction, good reliability and low cost.

[0047] The PCB circuit design is simpler, using smaller chips. The number of electronic components is significantly reduced, and the main electronic components are spaced farther apart and more rationally distributed, eliminating mutual interference between electronic components during module operation. The overall module circuit design is more optimized, lowering costs, increasing production efficiency, and being more economical.

[0048] like Figure 7 and Figure 8 As shown, the structure further comprises two screw assembly slots 7, which are mounted on the upper cover 1, and the upper surfaces of the screw assembly slots 7 are inclined. The upper surfaces of the screw assembly slots 7 are relatively inclined.

[0049] The structure further includes a fan volute 10 and screws 8 . The fan volute 10 is provided with a mounting post 9 . The mounting post 9 and the screw assembly slot 7 are connected by the screws 8 .

[0050] In the present invention, the upper cover 1 and the fan volute 10 are assembled with two screws 8, and the upper surface of the screw assembly groove 7 is designed with an inclined surface to ensure that when the module is assembled with the fan volute 10, the downward locking force of the screw 8 is perpendicular to the mounting column 9 of the fan volute 10, so that it can better fit the installation characteristics of the fan volute, making the installation reliability of the module higher. Figure 9 This is a diagram showing the completed assembly of the present invention.

[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A PWM fan speed control module structure based on a compacting mechanism, comprising a PCBA assembly (2), wherein the PCBA assembly (2) comprises a plurality of electronic components, characterized in that: The structure further comprises a pressing mechanism (6), which is mounted on the PCBA assembly (2), and the pressing mechanism (6) comprises a connecting piece and a pressing protection unit, wherein the connecting piece and the pressing protection unit are connected, and the pressing protection unit is mounted on the electronic component and is used to press and protect different electronic components.

2. A PWM fan speed regulation module structure based on a compression mechanism according to claim 1, characterized in that: The pressing mechanism (6) is made of TPE thermoplastic elastomer material.

3. The PWM fan speed regulation module structure based on the pressing mechanism according to claim 2 is characterized in that: The compression protection unit includes a sleeve-type protection sleeve and an annular compression sleeve.

4. The PWM fan speed regulation module structure based on the pressing mechanism according to claim 1 is characterized in that: The structure further comprises an upper cover (1) and a sealing ring (5), wherein the sealing ring (5), the pressing mechanism (6) and the upper cover (1) are combined into one body by secondary molding.

5. The PWM fan speed regulation module structure based on the pressing mechanism according to claim 4 is characterized in that: The structure further comprises a radiator (4), the radiator (4) is provided with a triangular fixing block, the upper cover (1) is provided with a hook, and the triangular fixing block and the hook are connected.

6. The PWM fan speed regulation module structure based on the pressing mechanism according to claim 5 is characterized in that: The structure further comprises a two-component heat-conducting adhesive (3), and the two-component heat-conducting adhesive (3) is mounted on the heat sink (4).

7. The PWM fan speed regulation module structure based on the pressing mechanism according to claim 5 is characterized in that: The PCBA assembly (2) comprises a PCB board, the PCB board is provided with a limiting hole, the radiator is further provided with a positioning column, and the limiting hole and the positioning column are connected.

8. The PWM fan speed regulation module structure based on the pressing mechanism according to claim 4 is characterized in that: The structure further comprises two screw assembly slots (7), wherein the screw assembly slots (7) are mounted on the upper cover (1), and the upper surfaces of the screw assembly slots (7) are inclined.

9. The PWM fan speed regulation module structure based on the pressing mechanism according to claim 8 is characterized in that: The upper surface of the screw assembly groove (7) is relatively inclined.

10. The PWM fan speed regulation module structure based on the pressing mechanism according to claim 8, characterized in that: The structure further comprises a fan volute (10) and a screw (8). The fan volute (10) is provided with a mounting post (9), and the mounting post (9) and the screw assembly slot (7) are connected via the screw (8).

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