A variable speed blower for automotive air conditioning

Abstract

This invention discloses an adjustable speed blower for automotive air conditioning, comprising a drive unit including a motor, a base fixedly connected to the outer surface of the motor, a drive seat rotatably connected to the base and driven by the motor, and a mounting element fixedly connected to the drive seat on the side away from the motor; and an impeller unit including a base, the base having mounting holes for connecting to the mounting element. This invention relates to the field of blower technology. This adjustable speed blower for automotive air conditioning effectively solves the problem in the prior art where the main function of a fan impeller is to generate airflow by rotating, blowing air into or out of the car. The shape, size, and installation angle of the fan impeller all affect the blower's airflow and pressure. Typically, blowers use multi-bladed impellers, and traditional impellers are mostly one-piece designs, resulting in the inability to adjust the tilt angle of the blades.

Description

Technical Field

[0001] This invention relates to the field of blower technology, and more specifically to an adjustable speed blower for automotive air conditioning. Background Technology

[0002] The function of a car's blower is to blow the cold air from the air conditioner evaporator or the hot air from the heater core into the car. Simply put, the blower's function is to deliver air. The speed of the car's air conditioning blower is controlled by a switch through resistors of different values ​​connected in series in the blower circuit, thus achieving the desired speed settings.

[0003] The fan impeller is a key component of a blower, typically made of plastic or metal. Its main function is to generate airflow through rotation, blowing air into or out of the vehicle's interior. The shape, size, and installation angle of the fan impeller all affect the blower's airflow and pressure. Blowers usually use multi-bladed impellers because multiple blades can provide more airflow and better balance. Traditional impellers are mostly one-piece designs, and the blade tilt angle cannot be adjusted, thus limiting their applicability. Summary of the Invention

[0004] Technical problems to be solved

[0005] To address the aforementioned shortcomings of existing technologies, this invention provides an adjustable speed blower for automotive air conditioning, which effectively solves the problem that in existing technologies, the main function of a fan impeller is to generate airflow by rotating to blow or expel air into or from the vehicle. The shape, size, and installation angle of the fan impeller all affect the airflow and pressure of the blower. Blowers typically use multi-bladed impellers, and traditional impellers are mostly one-piece designs, which leads to the problem that the tilt angle of the blades on the impeller cannot be adjusted.

[0006] Technical solution

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides an adjustable speed blower for automotive air conditioning, comprising:

[0009] The drive unit includes a motor, a base is fixedly connected to the outer surface of the motor, a drive seat that drives the motor is rotatably connected inside the base, and a mounting element is fixedly connected to the drive seat on the side away from the motor.

[0010] The impeller section includes a base, the base having a mounting hole for connecting to mounting elements, and several sets of blades rotatably connected inside the base. A gear is fixedly connected to the side of the blades near the drive seat, and a gear ring that rotates with the outer surface of the gear is meshed with the outer surface of the base.

[0011] Furthermore, the mounting element includes a sleeve, the outer surface of which is fixedly connected to the outer surface of the drive seat, and a mounting block connected to the outer surface of the drive seat is provided within the space enclosed by the sleeve. A mounting plate is damped and rotatably connected to the side of the mounting block away from the drive seat.

[0012] Furthermore, the base is fixedly connected to a protrusion that fits against the inner wall of the sleeve on the side near the toothed ring, and the mounting block extends through the protrusion and into the mounting hole on the side away from the drive seat.

[0013] Furthermore, a push plate is fixedly connected to the inner wall of the toothed ring, and a ring block is fixedly connected to the middle of the push plate. A frustum rod that is in contact with the inner wall of the ring block is slidably connected inside the base. The end of the frustum rod away from the ring block passes through the base and is fixedly connected to a limiting plate. A spring assembly connected to the outer surface of the base is fixedly connected to the side of the limiting plate near the frustum rod. The contact surfaces of the ring block and the frustum rod are designed with a rough texture.

[0014] Furthermore, the base is fixedly connected to an inner toothed plate on the side near the limiting plate, and an air collecting plate is threadedly connected to the inner wall of the inner toothed plate. The rotational installation direction of the air collecting plate is opposite to the working rotation direction of the base.

[0015] Furthermore, an end plate is detachably installed on the side of the blade away from the base, and a pad is snapped onto the side of the end plate away from the blade. A semi-circular elastic plate that fits against the end face of the blade is fixedly connected to the side of the pad near the end plate.

[0016] Furthermore, a threaded rod is threadedly connected to the outer circumference of the base via an ear block. A lead screw is fixedly connected to the end of the threaded rod away from the base, and a nut is threadedly connected to the end of the lead screw away from the threaded rod through a pad.

[0017] Beneficial effects

[0018] The technical solution provided by this invention has the following advantages compared with the prior art:

[0019] This invention comprises a drive unit and an impeller unit. First, the drive unit and impeller unit are separated by rotating the mounting plate to reset it, allowing the mounting block to slide out of the mounting hole. Next, the air collector plate is manually rotated and removed. Then, the nuts on the outer surface of the lead screw are rotated counterclockwise until the end plate and blades are loosened, but the frustum rod and the ring block remain tightly fitted, so the blades remain locked, preventing vibration and rotation during disassembly. By gently pushing the limiting plate manually, the frustum rod slides away from the inner wall of the ring block. Then, the pushing plate is gently rotated, causing the gears to rotate slightly around the outer surface of the base, driving several sets of gears to rotate synchronously, thereby achieving synchronous adjustment of the tilt angle of several sets of blades. After adjustment, the limiting plate is released, and the spring force causes the frustum rod and the ring block to re-fit, locking the blades again and preventing rotation after adjustment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 This is a three-dimensional multi-angle structural schematic diagram of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional separation of the air collecting plate and the base in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the three-dimensional separation of the drive unit and the impeller unit in an embodiment of the present invention;

[0025] Figure 5 This is a three-dimensional structural schematic diagram of the impeller section according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of a partial three-dimensional cross-section of the impeller section according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the three-dimensional partial separation of the impeller section according to an embodiment of the present invention;

[0028] Figure 8 This is a three-dimensional structural diagram of the pad and the semi-circular elastic plate according to an embodiment of the present invention.

[0029] The labels in the diagram represent: 1. Drive unit; 11. Motor; 12. Base; 13. Drive seat; 14. Mounting element; 141. Sleeve; 142. Mounting block; 143. Mounting plate; 2. Impeller unit; 21. Base; 210. Protrusion; 211. Frustum rod; 212. Limiting plate; 213. Spring assembly; 214. Internal gear plate; 215. Air collecting plate; 216. Threaded rod; 217. Lead screw; 22. Mounting hole; 23. Blade; 24. Gear; 25. Gear ring; 251. Push plate; 252. Ring block; 26. End plate; 261. Pad plate; 262. Semicircular spring plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] The present invention will be further described below with reference to embodiments.

[0032] Example:

[0033] Please see Figures 1-8 This invention provides a technical solution: an adjustable speed blower for automotive air conditioning, comprising:

[0034] The drive unit 1 includes a motor 11, a base 12 is fixedly connected to the outer surface of the motor 11, a drive seat 13 that drives the motor 11 is rotatably connected inside the base 12, and a mounting element 14 is fixedly connected to the side of the drive seat 13 away from the motor 11.

[0035] Impeller part 2 includes a base 21. The base 21 has a mounting hole 22 inside that is connected to the mounting element 14. Several sets of blades 23 are rotatably connected inside the base 21. A gear 24 is fixedly connected to the side of the blades 23 near the drive seat 13, and a gear ring 25 that rotates with the outer surface of the base 21 is meshed with the outer surface of the gear 24.

[0036] Mounting element 14 includes a sleeve 141, the outer surface of the sleeve 141 is fixedly connected to the outer surface of the drive seat 13, and a mounting block 142 connected to the outer surface of the drive seat 13 is provided in the space enclosed by the sleeve 141. A mounting plate 143 is damped and rotatably connected to the side of the mounting block 142 away from the drive seat 13.

[0037] The base 21 is fixedly connected to a protrusion 210 that fits against the inner wall of the sleeve 141 on the side near the toothed ring 25. The mounting block 142 extends through the protrusion 210 and into the mounting hole 22 on the side away from the drive seat 13.

[0038] A push plate 251 is fixedly connected to the inner wall of the toothed ring 25. A ring block 252 is fixedly connected to the middle of the push plate 251. A frustum rod 211 that is in contact with the inner wall of the ring block 252 is slidably connected inside the base 21. The end of the frustum rod 211 away from the ring block 252 passes through the base 21 and is fixedly connected to a limit plate 212. A spring assembly 213 that is connected to the outer surface of the base 21 is fixedly connected to the side of the limit plate 212 near the frustum rod 211. The contact surfaces of the ring block 252 and the frustum rod 211 are designed with a rough texture.

[0039] The base 21 is fixedly connected to the inner toothed plate 214 on the side near the limiting plate 212. The inner wall of the inner toothed plate 214 is threadedly connected to the air collecting plate 215. The rotational installation direction of the air collecting plate 215 is opposite to the working rotation direction of the base 21.

[0040] An end plate 26 is detachably installed on the side of the blade 23 away from the base 21. A pad 261 is snapped onto the side of the end plate 26 away from the blade 23. A semi-circular elastic plate 262 that fits against the end face of the blade 23 is fixedly connected to the side of the pad 261 near the end plate 26.

[0041] The outer circumference of the base 21 is threaded to a threaded rod 216 via an ear block. The end of the threaded rod 216 away from the base 21 is fixedly connected to a lead screw 217. The end of the lead screw 217 away from the threaded rod 216 passes through a pad 261 and is threaded to a nut.

[0042] refer to Figure 1-8 The fan impeller is a key component of a blower, typically made of plastic or metal. Its main function is to generate airflow through rotation, blowing air into or out of the vehicle. The shape, size, and installation angle of the fan impeller all affect the blower's airflow and pressure. Blowers usually use multi-bladed impellers because multiple blades provide more airflow and better balance. Traditional impellers are mostly one-piece designs, and the blade tilt angle cannot be adjusted, thus limiting their applicability.

[0043] Reason for adjustment: The blade tilt angle of the impeller directly affects the airflow it generates. When the blade tilt angle is small, the airflow is mainly formed by the air being driven by the rotation of the blades. At this time, because the airflow speed is slow, the generated airflow is also relatively small. When the blade tilt angle is large, the air is forced to accelerate as it passes through the blades, forming a stronger airflow. Therefore, while maintaining stability and noise levels, increasing the blade tilt angle can increase the airflow. Besides affecting airflow, the blade tilt angle also directly affects the impeller's efficiency. When the blade tilt angle is small, more energy is needed to rotate the blades because the generated airflow is small, resulting in relatively low efficiency. Conversely, when the blade tilt angle is large, the air is forced to accelerate as it passes through the blades, forming a stronger airflow. Therefore, while maintaining stability and noise levels, increasing the blade tilt angle can improve the impeller's efficiency.

[0044] To overcome the aforementioned shortcomings, this invention designs an adjustable speed blower for automotive air conditioning. In this application, firstly, the drive unit 1 and the impeller unit 2 adopt a separable structure; secondly, the main body of the impeller unit 2 adopts a detachable structure, unlike conventional one-piece impellers.

[0045] Assembly of impeller section 2:

[0046] Initially, the blade 23 and the gear 24 are fixedly connected (the blade 23 includes the blade body and the rotating rod). The base 21 is fitted onto the outer surface of the rotating rod of the blade 23 (injection molding process can be used). Several sets of blades 23 are arranged at the same tilt angle. Then, the gear ring 25 is rotatably installed on the outer surface of the base 21, and at the same time, the outer surface of the gear ring 25 meshes with the outer surface of the gear 24. Meanwhile, the frustum rod 211 is pre-slidably installed inside the base 21 (it can only slide and cannot rotate). Then, a spring assembly 213 is fitted on the outer circumference of the frustum rod 211. A limiting plate 212 is welded to the end of the frustum rod 211. Under the elastic force of the spring assembly 213, the limiting plate 212 is driven to move away from the base 21, causing the inclined arc surface of the frustum rod 211 to fit tightly against the inner wall of the ring block 252. Since the contact surfaces of both are designed with a rough texture, the frustum rod 211 generates a certain frictional force on the ring block 252, which can prevent the toothed ring 25 and the push plate 251 from rotating slightly (before being installed with the drive unit 1), thus affecting the initial adjustment accuracy of the blade 23. It should also be emphasized that the end face of the gear ring 25, the end face of the protrusion 210, and the end face of the ring block 252 are located on the same horizontal plane. At the same time, the end of the frustum rod 211 away from the limiting plate 212 adopts a micro-elastic design, and this end face protrudes from the ring block 252 and is partially exposed. Then, the threaded rod 216 is rotated and installed on the base 21. Next, the end plate 26 and the pad 261 are stacked and fitted on the outer circumference of the screw 217. The rotating rod on the other side of the blade 23 extends into the end plate 26. Then, the screw 217 is locked with a nut. The nut generates a thrust on the pad 261, which drives the end plate 26 to press against the blade 23, so that the base 21, blade 23, gear 24, threaded rod 216, screw 217, end plate 26, pad 261, and nut are combined into a whole.

[0047] The function of the pad 261 is twofold: First, during the tightening of the nut, the semi-circular elastic plate 262 extends into the end plate 26 and comes into contact with the end face of the rotating rod on the blade 23, clamping it, and the semi-circular elastic plate 262 undergoes slight elastic deformation; Second, the pad 261 is subjected to the elastic force of the semi-circular elastic plate 262, and the two work together to act as a "shim" between the screw 217 and the nut, and this "shim" is used by all four sets of screw 217 and nuts, thus providing better anti-loosening effect.

[0048] Regarding the installation stability of blade 23 and gear 24, this application provides the following advantages:

[0049] On the one hand, the blade 23 and the gear 24 are fixedly connected, and the gear ring 25 and the gear 24 are meshed. The ring block 252 is subjected to the friction force of the frustum rod 211, which can play a preliminary limiting role on the blade 23 and the gear 24 (to prevent them from rotating).

[0050] On the other hand, with the help of the threaded rod 216, lead screw 217, end plate 26 and pad 261, the base 21, blade 23, gear 24, threaded rod 216, lead screw 217, end plate 26, pad 261 and nut are combined into a whole. The blade 23 is completely locked between the base 21 and the end plate 26 to prevent vibration during subsequent high-speed rotation. Secondly, the semi-circular spring plate 262 extends into the end plate 26 and fits against the end face of the rotating rod on the blade 23 to clamp it, further reinforcing and fixing the rotating rod on the blade 23 to prevent it from rotating on its own.

[0051] On the other hand, when the drive unit 1 is installed, the drive seat 13 on the drive unit 1 will further press against the frustum rod 211, so that the frustum rod 211 will fit more tightly against the inner wall of the ring block 252. At this time, the frustum rod 211 and the ring block 252 are combined into a whole, and the gear ring 25, gear 24 and blade 23 are completely locked.

[0052] Assembly of drive unit 1 and impeller unit 2:

[0053] After the impeller part 2 is assembled, the mounting block 142 on the mounting element 14 is aligned with the mounting hole 22 and slid inward. At the same time, the inner wall of the sleeve 141 slides along the outer circumferential surface of the protrusion 210. The outer surface of the drive seat 13 begins to contact the outer surface of the frustum rod 211. Then, the motor 11 is further pushed (the outside of the impeller part 2 is fixed), causing the outer surface of the drive seat 13 to press against the outer surface of the frustum rod 211 until the outer surface of the drive seat 13 is in contact with the end face of the protrusion 210 and the end face of the toothed ring 25. Then, the mounting plate 143 is rotated 180 degrees and rotated to the outer surface of the base 21. Then, the mounting plate 143 and the base 21 are locked with bolts, so that the mounting element 14 and the base 21 are combined into a whole, completing the assembly of the drive part 1 and the impeller part 2.

[0054] Blade 23 tilt angle adjustment:

[0055] As described above, firstly, by rotating the mounting plate 143 to reset, the mounting block 142 slides out of the mounting hole 22, completing the separation of the drive unit 1 and the impeller unit 2. Next, manually rotate the air collecting plate 215 and remove it. Then, rotate the nut on the outer circumference of the screw 217 counterclockwise (without removing it) until the end plate 26 and the blade 23 are loosened. However, the frustum rod 211 and the ring block 252 remain tightly fitted, so the blade 23 remains locked, preventing the blade 23 from vibrating and rotating during disassembly. The limiting plate 212 can be gently pushed manually to cause the frustum rod 211 to slide away from the inner wall of the ring block 252 (the spring assembly 213 undergoes elastic deformation). Then, the push plate 251 can be gently rotated to cause the gear ring 25 to rotate at a small angle around the outer surface of the base 21, thereby causing several sets of gears 24 to rotate synchronously. This allows the tilt angles of several sets of blades 23 to be adjusted synchronously. After adjustment, the limiting plate 212 can be released. Due to the elastic force of the spring assembly 213, the frustum rod 211 and the ring block 252 will re-adhere to each other, locking the blades 23 again. It should also be emphasized that traditional blower impellers need to be removed and cleaned with a disc cleaner after long-term use. Since traditional blower impellers are one-piece structures, cleaning the impeller is very inconvenient. In contrast, in this application, the pad 261, end plate 26, pad 261, lead screw 217, and base 21 are all detachable. After disassembly, one end of the blade 23 will be exposed, which makes it easy for the brush to clean quickly in the same direction.

[0056] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A variable speed blower for use in an automotive air conditioner, characterized by, The utility model provides a kind of drive unit and impeller unit, including: Driving part (1), the driving part (1) includes motor (11), the base (12) is fixedly connected to the outer surface of motor (11), the inside rotationally connected with the driving seat (13) of motor (11) is transmitted to base (12), and the installation element (14) is fixedly connected to the side of driving seat (13) away from motor (11); Impeller part (2), the impeller part (2) includes base (21), the inside of base (21) is provided with installation hole (22) connected with installation element (14), the inside rotationally connected with several groups of blades (23) of base (21), the gear (24) is fixedly connected to the side of blade (23) close to driving seat (13), and the outer surface of gear (24) is engaged with the gear ring (25) rotationally connected with the outer surface of base (21);The installation element (14) includes sleeve (141), the outer surface of sleeve (141) is fixedly connected with the outer surface of driving seat (13), the space surrounded by sleeve (141) is equipped with installation block (142) connected with the outer surface of driving seat (13), and the installation plate (143) is rotationally connected with the side of installation block (142) away from driving seat (13);The protruding block (210) that is in close contact with the inner wall of sleeve (141) is fixedly connected to the side of base (21) close to gear ring (25), and the side of installation block (142) away from driving seat (13) penetrates protruding block (210) and extends to installation hole (22) inside;The inner wall of gear ring (25) is fixedly connected with push plate (251), the middle part of push plate (251) is fixedly connected with ring block (252), the inside slidingly connected with base (21) is in close contact with the inner wall of ring block (252) circular table rod (211), the end of circular table rod (211) away from ring block (252) penetrates base (21) and is fixedly connected with limit plate (212), and the spring group (213) is fixedly connected with the outer surface of base (21) on the side of limit plate (212) close to circular table rod (211), the inlay surface of ring block (252) and circular table rod (211) is designed with roughness;The end plate (26) is detachably installed on the side of blade (23) away from base (21), the side of end plate (26) away from blade (23) is clamped and installed with pad (261), and the semicircular elastic plate (262) that is in close contact with the end surface of blade (23) is fixedly connected to the side of pad (261) close to end plate (26).

2. A variable speed blower for an automotive air conditioner as defined in claim 1 wherein: The inner tooth plate (214) is fixedly connected to the side of base (21) close to limit plate (212), the inner wall of inner tooth plate (214) is threadedly connected with wind collecting plate (215), and the rotational installation direction of wind collecting plate (215) is opposite to the working rotation direction of base (21).

3. A variable speed blower for an automotive air conditioner as defined in claim 1 wherein: The circumferential outer surface of base (21) is threadedly connected with threaded rod (216) through ear block, the end of threaded rod (216) away from base (21) is fixedly connected with screw rod (217), the end of screw rod (217) away from threaded rod (216) penetrates pad (261) and is threadedly connected with nut.

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