Blast motor of automobile air conditioning cabinet

Abstract

The utility model discloses a blower motor of an automobile air conditioning cabinet, and belongs to the technical field of blower motors. Comprising a rotor assembly rotationally connected in a stator inner cavity of a stator assembly, the stator assembly is installed in a stator installation cavity defined by a flange assembly and a rear cover assembly, and a motor shaft on the rotor assembly penetrates through a blanking cap; the flange assembly comprises a first flange and a second flange, the first flange is connected to the stator assembly, the second flange is arranged on the first flange in a sleeving mode, a gap is reserved between the second flange and the first flange, and the first flange and the second flange are connected through a plurality of rubber parts; a controller assembly is arranged in the containing cavity in the rear cover assembly, an output terminal on the controller assembly is electrically connected with a wiring terminal on the stator assembly through a contact pin, and the two ends of the contact pin are in floating connection with the output terminal and the wiring terminal respectively. The air blower motor of the automobile air conditioning cabinet can consume vibration generated during operation of the stator assembly, reduce the path and strength of vibration transmission, and reduce operation noise.

Description

Technical Field

[0001] This utility model belongs to the field of blower motor technology, specifically relating to a blower motor for an automotive air conditioning unit. Background Technology

[0002] With the increasing popularity of new energy vehicles, drivers, passengers, and automobile manufacturers have higher requirements for passenger cabin comfort. Noise is a significant factor affecting comfort, and the noise generated by the air conditioning blower motor is a major source of noise during vehicle operation. Reducing the noise of the air conditioning blower motor can effectively improve the comfort of driving and riding in a car.

[0003] The noise generated by the blower motor during operation mainly originates from the motor's own rotation and the interaction between the airflow and the motor components. The motor structure design of traditional blower motors is not optimized enough, and the vibration generated when the rotating components rotate can be directly transmitted through the stator assembly to the flange assembly connected to the air conditioning unit, thus causing noise.

[0004] Therefore, there is an urgent need for a blower motor for automotive air conditioning units that can reduce operating noise. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automotive air conditioning blower motor that can consume the vibration generated by the stator assembly during operation, reduce the path and intensity of vibration transmission, and reduce operating noise.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a blower motor for an automotive air conditioning unit, comprising a rotor assembly rotatably connected to the stator cavity of a stator assembly, the stator assembly being installed in a stator mounting cavity formed by a flange assembly and a rear cover assembly, and a motor shaft on the rotor assembly being movably inserted through a plug, the plug being able to seal the end opening of the stator cavity and being rotatably connected to the rotor assembly;

[0007] The flange assembly includes a first flange and a second flange. The first flange is connected to the stator assembly, and the second flange is sleeved on the first flange with a gap between them. The first flange and the second flange are flexibly connected by multiple rubber parts.

[0008] A controller assembly is disposed in the receiving cavity on the rear cover assembly. The output terminal on the controller assembly is electrically connected to the wiring terminal on the stator assembly through a pin, and the two ends of the pin are respectively floatingly connected to the output terminal and the wiring terminal.

[0009] Optionally, the terminal block is provided with a first spring clip holding part for clamping the end of the pin, the output terminal is in the shape of a cross pattern, one end of the output terminal is electrically connected to the controller assembly, and the other end of the output terminal is provided with a second spring clip holding part for clamping the end of the pin.

[0010] The end of the pin that is connected to the first spring clip holding part and the second spring clip holding part is flat, and the first spring clip holding part and the second spring clip holding part can surround the end of the terminal.

[0011] Optionally, the plurality of rubber parts are evenly spaced and arranged in a circumferential array along the rotation axis of the rotor assembly, and the two ends of the rubber parts are respectively embedded in the first flange and the second flange.

[0012] Optionally, a heat dissipation plate that can extend into the stator mounting cavity is provided on one side of the controller assembly, and a cooling channel communicating with the stator mounting cavity is provided on the flange assembly, and a first through hole communicating with the stator mounting cavity is provided at the bottom of the stator inner cavity.

[0013] The rear cover assembly includes a first rear cover connected to the second flange and a second rear cover connected to the first rear cover. The first rear cover and the second rear cover form the receiving cavity. The first rear cover is provided with a second through hole for communicating the receiving cavity and the stator mounting cavity. The heat sink can be embedded in the second through hole. A flexible pad layer that can adhere to the heat sink is provided around the end of the second through hole.

[0014] Optionally, the heat sink is provided with a plurality of heat dissipation fins extending into the stator mounting cavity and exposed in the cooling channel. The gap between the heat sink and the controller assembly is filled with thermally conductive silicone grease, and the electronic components on the controller assembly are all placed within the projected area of ​​the heat sink on the controller assembly.

[0015] Optionally, the pin can be connected to the output terminal on the controller assembly and the wiring terminal on the stator assembly through a through hole provided on the first rear cover, and the outer periphery of the pin is provided with a flexible waterproof plug that can tightly fit with the through hole.

[0016] Optionally, the stator assembly further includes a winding frame, a yoke core disposed on the winding frame, and several sets of enameled wire windings wound on the winding frame. The several sets of enameled wire windings are arranged in a circumferential array around the stator inner cavity disposed on the winding frame, and adjacent sets of enameled wire windings are electrically connected through winding cross-wires.

[0017] The terminal block includes a U-shaped copper busbar terminal, a V-shaped copper busbar terminal, and a W-shaped copper busbar terminal connected to the winding frame and respectively provided with a first spring clip holding part. The U-shaped copper busbar terminal, the V-shaped copper busbar terminal, and the W-shaped copper busbar terminal are in a ring shape. The U-shaped copper busbar terminal, the V-shaped copper busbar terminal, and the W-shaped copper busbar terminal are respectively provided with a plurality of wire pressing hooks for hooking the winding cross wires. The winding frame is provided with a plurality of enameled wire support blocks respectively corresponding to the wire pressing hooks and capable of supporting the winding cross wires.

[0018] Optionally, the rotor assembly further includes a rotor core and bearing sleeved on the motor shaft, and a rotor winding wound on the rotor core.

[0019] The motor shaft is fitted with balance blocks placed at both ends of the rotor core, and the bearing can be embedded in a bearing chamber coaxially arranged in the stator cavity and the plug.

[0020] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: by connecting the stator assembly to the first flange in the flange assembly, and connecting the first flange to the second flange through a rubber component, the rubber component can convert the energy generated by the vibration of the stator assembly into its own internal energy through its own deformation, which can effectively reduce the intensity of vibration transmitted between the first flange and the second flange. Furthermore, by floatingly connecting the two ends of the pin to the output terminal and the wiring terminal respectively, the transmission of vibration from the stator assembly to the controller assembly through the pin can be effectively reduced. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is an exploded structural diagram of the blower motor of the automotive air conditioning unit in a preferred embodiment of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the blower motor of the automotive air conditioning unit in a preferred embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of the blower motor of the automotive air conditioning unit in a preferred embodiment of the present invention;

[0025] Figure 4 This is a preferred embodiment of the present invention. Figure 3 A magnified structural diagram at point B;

[0026] Figure 5 This is a top view of the preferred embodiment of the present invention, showing the pin tip floatingly connected to the output terminal.

[0027] Figure 6This is a preferred embodiment of the present invention. Figure 5 A schematic cross-sectional view at point AA;

[0028] Figure 7 This is a schematic diagram of the terminal block structure in a preferred embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the stator assembly in a preferred embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram of the winding skeleton in a preferred embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the structure of the back cover assembly in a preferred embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the rotor assembly in a preferred embodiment of the present invention;

[0033] Among them, 1. Stator assembly; 101. Stator inner cavity; 1011. First through hole; 1012. Bearing chamber; 102. Terminal block; 1021. First spring clip holding part; 1022. Wire pressing hook part; 103. Winding skeleton; 1031. Enamelled wire support block; 104. Yoke core; 105. Enamelled wire winding; 106. Winding cross wire; 2. Rotor assembly; 201. Motor shaft; 202. Rotor core; 203. Bearing; 204. Rotor winding. ; 205, counterweight; 3, flange assembly; 301, first flange; 302, second flange; 303, rubber parts; 304, cooling channel; 4, rear cover assembly; 401, first rear cover; 4011, second through hole; 4012, flexible pad; 402, second rear cover; 5, plug; 6, controller assembly; 601, output terminal; 6011, second spring clip holding part; 7, pin; 8, heat sink; 801, heat sink fins; 9, flexible waterproof plug. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0035] It should be noted that if directional indicators (such as up, down, bottom, top, etc.) are involved in this embodiment, these directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. Example 1

[0036] like Figures 1-11 As shown, an automotive air conditioning unit blower motor includes a rotor assembly 2 rotatably connected to a stator assembly 1 within a stator cavity 101. The stator assembly 1 is mounted within a stator mounting cavity formed by a flange assembly 3 and a rear cover assembly 4. A motor shaft 201 on the rotor assembly 2 movably passes through a plug 5, which seals the end opening of the stator cavity 101 and is rotatably connected to the rotor assembly 2. When the enameled wire winding 105 in the stator assembly 1 is energized, the rotor assembly 2 can rotate efficiently and stably, and output mechanical energy through the motor shaft 201. It should be noted that when the rotor assembly 2 rotates, the vibrations it generates are transmitted outwards through the stator assembly 1, flange assembly 3, etc., thus producing noise. In this technical solution, the flange assembly 3 includes a first flange 301 and a second flange 302. The second flange 302 can be installed on the air conditioning unit using fasteners such as bolts, while the first flange 301 is connected to the stator assembly 1. Specifically, the first flange 301 can be mechanically rigidly connected to the stator assembly 1 using methods such as plastic heat riveting, screw fixing, or metal rivet fixing to improve the stability of the motor's internal structure. Simultaneously, the second flange 302 is fitted onto the first flange 301 with a gap between them, and the first flange 301 and the second flange 302 are flexibly connected by multiple rubber parts 303. The rubber parts 303 have good elasticity and damping characteristics, causing them to deform when subjected to vibration, thereby converting the energy generated by the vibration into their own internal energy. This reduces the amplitude of the rotor assembly 2's vibration, and correspondingly reduces the noise intensity generated by the vibration.

[0037] The rear cover assembly 4 has a receiving cavity in which a controller assembly 6 is provided. The output terminal 601 on the controller assembly 6 is electrically connected to the wiring terminal 102 on the stator assembly 1 through a pin 7. The two ends of the pin 7 are floatingly connected to the output terminal 601 and the wiring terminal 102 respectively, thereby effectively reducing the transmission of vibration from the stator assembly 1 to the controller assembly 6 through the pin 7.

[0038] Specifically, the terminal block 102 is provided with a first spring clip holding part 1021 for clamping the end of the pin 7, one end of the output terminal 601 is electrically connected to the controller assembly 6, and the other end of the output terminal 601 is provided with a second spring clip holding part 6011 for clamping the end of the pin 7. The materials used for the output terminal 601, the terminal block 102, and the pin 7 all possess good conductivity and deformation recovery capabilities, such as copper, beryllium bronze, and phosphor bronze. In this technical solution, both the first spring clip holding part 1021 and the second spring clip holding part 6011 consist of an elastic spring clip and a support piece that facilitates contact between the pin 7 and the spring clip. The spring clip and the support piece are arranged opposite to each other, and a gap is left between the spring clip and the support piece for the insertion of the pin 7. In practical use, the end of the pin 7 can widen the gap between the spring and the support plate, allowing the spring to tightly abut against one side of the end of the pin 7 through its deformation recovery ability. Simultaneously, it causes the other side of the end of the pin 7 to contact the support plate, thus ensuring that the pin 7 can be electrically connected to the output terminal 601 and the wiring terminal 102, while also allowing the pin 7 to float in the direction of insertion into the output terminal 601 and the wiring terminal 102. It should be noted that the end of the pin 7 connected to the first spring clip 1021 and the second spring clip 6011 is flat to increase the contact area between the pin 7 and the first spring clip 1021 and the second spring clip 6011, ensuring the strength of the electrical connection. At the same time, the first spring clip 1021 and the second spring clip 6011 can both surround the end of the wiring terminal 102 to confine the end of the pin 7 within the effective range of the spring clip. It should be noted that... Figure 5 , Figure 6 As shown, the output terminal 601 has a U-shaped pattern, meaning it is composed of a metal plate that is continuously bent inwards. The outermost end of the metal plate can be fixedly and electrically connected to the controller assembly 6, while the innermost end of the metal plate forms the second spring clip holding part 6011 through bending or other means. Since the output terminal 601 itself has good deformation recovery capability, when the end of the pin 7 connected to the second spring clip holding part 6011 shifts position due to vibration, the output terminal 601 deforms accordingly. This ensures the electrical connection between the pin 7 and the output terminal 601 while also weakening the impact of vibration on the controller assembly 6, thereby effectively reducing the impact of stator assembly 1 vibration on the controller assembly 6.

[0039] Furthermore, in this embodiment, such as Figure 2 As shown, the rubber parts 303 are independent of each other, and there are at least three rubber parts 303. The multiple rubber parts 303 are evenly spaced and can be arranged in a circumferential array along the rotation axis of the rotor assembly 2. The hardness of the rubber parts 303 is ≤60A (Shore hardness). When the stator assembly 1 vibrates, the rubber parts 303 can act as dampers to absorb and reduce the vibration transmitted from the first flange 301 to the second flange 302, thereby preventing the vibration from being directly transmitted to the air conditioning unit connected to the second flange 302.

[0040] It should also be noted that in this technical solution, the first flange 301 and the second flange 302 can be made of plastic, thereby reducing the transmission of vibration to a certain extent.

[0041] Furthermore, such as Figure 1 , Figure 3 , Figure 9 As shown, a heat sink 8 extending into the stator mounting cavity is provided on one side of the controller assembly 6. The heat sink 8 can conduct the heat generated by the controller assembly 6 during operation. A cooling channel 304 communicating with the stator mounting cavity is provided on the flange assembly 3. A first through hole 1011 communicating with the stator mounting cavity is provided at the bottom of the stator inner cavity 101. The cooling channel 304 can communicate with the external environment. When the rotor assembly 2 rotates, the airflow generated can enter the stator mounting cavity through the first through hole 1011 at the bottom of the stator inner cavity 101, thereby causing the air in the stator mounting cavity to flow rapidly, so as to quickly dissipate the heat accumulated on the heat sink 8 and the rubber part 303. Meanwhile, the rear cover assembly 4 includes a first rear cover 401 connected to the second flange 302 and a second rear cover 402 connected to the first rear cover 401. A receiving cavity is formed between the first rear cover 401 and the second rear cover 402. The first rear cover 401 is provided with a second through hole 4011 for connecting the receiving cavity and the stator mounting cavity. The heat sink 8 can be embedded in the second through hole 4011. A flexible pad 4012 for adhering the heat sink 8 is provided around the end of the second through hole 4011. It should be noted that the flexible pad 4012 is formed by fixing one or more materials such as silicone glue, polyurethane glue, acrylic glue, epoxy resin glue, and neoprene rubber glue. It has strong adhesion, which can make the heat sink 8 firmly adhere to the first rear cover 401. At the same time, the flexible pad 4012 can fill the gap between the first rear cover 401 and the heat sink 8 to prevent impurities from entering the receiving cavity and affecting the normal operation of the controller assembly 6. Meanwhile, the flexible pad 4012 has good elasticity after curing, which can reduce the effect of vibration transmission between the heat sink 8 and the first back cover 401.

[0042] Meanwhile, the pin 7 can be connected to the output terminal 601 on the controller assembly 6 and the wiring terminal 102 on the stator assembly 1 through a through hole provided on the first rear cover 401. A flexible waterproof plug 9, made of flexible materials such as rubber and silicone, is fitted around the outer periphery of the pin 7 to ensure a tight fit with the through hole. This flexible waterproof plug 9 provides good elasticity, ensuring the sealing of the receiving cavity and limiting the floating distance of the pin 7, preventing the end of the pin 7 from detaching from the wiring terminal 102 or the output terminal 601.

[0043] Furthermore, such as Figure 1 , Figure 3 As shown, the heat sink 8 is provided with several heat dissipation fins 801 extending into the stator mounting cavity and exposed in the cooling channel 304 to increase the heat dissipation efficiency of the heat sink 8. Simultaneously, the gap between the heat sink 8 and the controller assembly 6 is filled with thermally conductive silicone grease to increase the efficiency of heat conduction between the heat sink 8 and the controller assembly 6. Furthermore, the electronic components on the controller assembly 6 are all placed within the projected area of ​​the heat sink 8 on the controller assembly 6, allowing the heat sink 8 to effectively conduct the waste heat generated during the operation of the electronic components. Example 2

[0044] like Figures 8-9As shown, based on Embodiment 1, the stator assembly 1 further includes a winding frame 103, a yoke core 104 disposed on the winding frame 103, and several sets of enameled wire windings 105 wound on the winding frame 103. The several sets of enameled wire windings 105 are arranged in a circular array around the stator inner cavity 101 placed on the winding frame 103, and adjacent sets of enameled wire windings 105 are electrically connected through winding cross wires 106. After the enameled wire windings 105 are connected to the three-phase power supply through the terminal 102, they can cooperate with the yoke core 104 to generate a rotating magnetic field, thereby driving the rotor assembly 2 rotatably connected to the stator inner cavity 101 to rotate. It should be noted that in this embodiment, the terminal block 102 includes a U-copper busbar terminal, a V-copper busbar terminal, and a W-copper busbar terminal connected to the winding frame 103 and respectively provided with a first spring clip holding part 1021. The winding frame 103 is made of plastic (insulating material), and the U-copper busbar terminal, V-copper busbar terminal, and W-copper busbar terminal are ring-shaped, independently arranged, and arranged sequentially outward from the centerline of the winding frame 103 (similar to the arrangement of rings on a bullseye). Meanwhile, the U-copper busbar terminal, V-copper busbar terminal, and W-copper busbar terminal are each provided with multiple wire-pressing hooks 1022 for hooking the winding crossover wires 106. The winding frame 103 is provided with multiple enameled wire support blocks 1031, each corresponding to a wire-pressing hook 1022 and capable of supporting the winding crossover wires 106. It should be noted that the enameled wire support blocks 1031 are made of insulating material and can raise the winding crossover wires 106 hooked onto the wire-pressing hooks 1022, allowing them to pass over the W-copper busbar terminal and V-copper busbar terminal, or the U-copper busbar terminal and W-copper busbar terminal, or the U-copper busbar terminal and V-copper busbar terminal. The winding crossover wires 106 between adjacent sets of enameled wire windings 105 are orderly hooked onto the wire-pressing hooks 1022 on the U-copper busbar terminal, V-copper busbar terminal, and W-copper busbar terminal to facilitate three-phase power supply to the motor structure.

[0045] Furthermore, such as Figure 11 As shown, the rotor assembly 2 also includes a rotor core 202 and a bearing 203 sleeved on the motor shaft 201, and a rotor winding 204 wound on the rotor core 202. Among them, a balance block 205 is sleeved on the motor shaft 201 and placed at both ends of the rotor core 202. The balance block 205 can balance the mass distribution of the rotor assembly 2 and reduce the vibration and noise of the rotor assembly 2 when it rotates at high speed.

[0046] In this technical solution, the bearing 203 can be embedded in the bearing chamber 1012 located in the stator inner cavity 101 and on the plug 5. The bearing chamber 1012 in the stator inner cavity 101 and the bearing chamber 1012 on the plug 5 are coaxially arranged when they are assembled to ensure the stability of the rotor assembly 2 during operation. At the same time, since the winding frame 103 is made of plastic, radial reinforcing ribs can be provided around the corresponding bearing chamber 1012 to further increase the strength of the stator inner cavity 101.

[0047] Working principle: By connecting the stator assembly 1 to the first flange 301 in the flange assembly 3, and connecting the first flange 301 to the second flange 302 through the rubber part 303, the rubber part 303 can convert the energy generated by the vibration of the stator assembly 1 into its own internal energy through its own deformation, which can effectively reduce the intensity of vibration transmitted between the first flange 301 and the second flange 302. By floatingly connecting the two ends of the pin 7 to the output terminal 601 and the wiring terminal 102 respectively, the transmission of vibration from the stator assembly 1 to the controller assembly 6 through the pin 7 can be effectively reduced.

[0048] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A blower motor for an automotive air conditioning unit, characterized in that: The rotor assembly (2) is rotatably connected to the stator cavity (101) of the stator assembly (1). The stator assembly (1) is installed in the stator mounting cavity formed by the flange assembly (3) and the rear cover assembly (4). The motor shaft (201) on the rotor assembly (2) is movably inserted through the plug (5). The plug (5) can block the end opening of the stator cavity (101) and can be rotatably connected to the rotor assembly (2). The flange assembly (3) includes a first flange (301) and a second flange (302). The first flange (301) is connected to the stator assembly (1). The second flange (302) is sleeved on the first flange (301) and has a gap between it and the first flange (301). The first flange (301) and the second flange (302) are flexibly connected by multiple rubber parts (303). The back cover assembly (4) has a receiving cavity in which a controller assembly (6) is provided. The output terminal (601) on the controller assembly (6) is electrically connected to the wiring terminal (102) on the stator assembly (1) via a pin (7). The two ends of the pin (7) are respectively floatingly connected to the output terminal (601) and the wiring terminal (102).

2. The automotive air conditioning unit blower motor according to claim 1, characterized in that: The terminal block (102) is provided with a first spring clip holding part (1021) for clamping the end of the pin (7), the output terminal (601) is in the shape of a meander pattern, and one end of the output terminal (601) is electrically connected to the controller assembly (6), and the other end of the output terminal (601) is provided with a second spring clip holding part (6011) for clamping the end of the pin (7). The end of the pin (7) connected to the first spring clip holding part (1021) and the second spring clip holding part (6011) is flat, and the first spring clip holding part (1021) and the second spring clip holding part (6011) can be arranged around the end of the terminal (102).

3. The automotive air conditioning unit blower motor according to claim 1, characterized in that: The multiple rubber parts (303) are evenly spaced and can be arranged in a circumferential array along the rotation axis of the rotor assembly (2), and the two ends of the rubber parts (303) are respectively embedded in the first flange (301) and the second flange (302).

4. The automotive air conditioning unit blower motor according to claim 1, characterized in that: The controller assembly (6) has a heat sink (8) on one side that can extend into the stator mounting cavity, and the flange assembly (3) has a cooling channel (304) communicating with the stator mounting cavity. The bottom of the stator inner cavity (101) has a first through hole (1011) communicating with the stator mounting cavity. The rear cover assembly (4) includes a first rear cover (401) connected to the second flange (302) and a second rear cover (402) connected to the first rear cover (401). The first rear cover (401) and the second rear cover (402) form the receiving cavity. The first rear cover (401) is provided with a second through hole (4011) for connecting the receiving cavity and the stator mounting cavity. The heat sink (8) can be embedded in the second through hole (4011). A flexible pad (4012) that can adhere to the heat sink (8) is provided around the end of the second through hole (4011).

5. The automotive air conditioning unit blower motor according to claim 4, characterized in that: The heat sink (8) is provided with a plurality of heat sink fins (801) extending into the stator mounting cavity and exposed in the cooling channel (304). The gap between the heat sink (8) and the controller assembly (6) is filled with thermal grease, and the electronic components on the controller assembly (6) are all placed within the projected area of ​​the heat sink (8) on the controller assembly (6).

6. The automotive air conditioning unit blower motor according to claim 4, characterized in that: The pin (7) can be connected to the output terminal (601) on the controller assembly (6) and the wiring terminal (102) on the stator assembly (1) through a through hole provided on the first rear cover (401), and a flexible waterproof plug (9) that can fit tightly with the through hole is provided on the outer periphery of the pin (7).

7. The automotive air conditioning unit blower motor according to claim 1, characterized in that: The stator assembly (1) further includes a winding frame (103), a yoke core (104) disposed on the winding frame (103), and several sets of enameled wire windings (105) wound on the winding frame (103). The several sets of enameled wire windings (105) are arranged in a circular array around the stator cavity (101) disposed on the winding frame (103), and adjacent sets of enameled wire windings (105) are electrically connected through winding cross wires (106). The terminal block (102) includes a U-copper busbar terminal, a V-copper busbar terminal and a W-copper busbar terminal connected to the winding frame (103) and respectively provided with a first spring clip holding part (1021). The U-copper busbar terminal, the V-copper busbar terminal and the W-copper busbar terminal are in the shape of a ring. The U-copper busbar terminal, the V-copper busbar terminal and the W-copper busbar terminal are respectively provided with a plurality of wire pressing hooks (1022) for hooking the winding cross wire (106). The winding frame (103) is provided with a plurality of enameled wire support blocks (1031) respectively corresponding to the wire pressing hooks (1022) and capable of supporting the winding cross wire (106).

8. The automotive air conditioning unit blower motor according to claim 1, characterized in that: The rotor assembly (2) further includes a rotor core (202) and a bearing (203) sleeved on the motor shaft (201), and a rotor winding (204) wound on the rotor core (202). Among them, the motor shaft (201) is fitted with balance blocks (205) placed at both ends of the rotor core (202), and the bearing (203) can be embedded in the bearing chamber (1012) arranged coaxially on the stator inner cavity (101) and the plug (5).

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