CN216767821U - Air blower and automobile air conditioner assembly - Google Patents

Abstract

The utility model relates to a blower and an automobile air conditioning assembly. The blower includes a mounting base with a cavity, a support plate that isolates the cavity into a circuit cavity and an assembly cavity, a circuit board disposed in the circuit cavity and attached to the support plate, and an assembly cavity and fixed to the support plate The stator and rotor assembly; the mounting base is constructed with an air flow channel in fluid communication with the assembly cavity, for guiding the air flow from the outside of the blower to the assembly cavity; wherein, at least part of the air flow introduced into the assembly cavity through the air flow channel can flow through the support The board faces the side of the assembly cavity to dissipate the circuit board, and the air flow introduced into the assembly cavity through the air flow channel is discharged from the installation base after passing through the stator and rotor assembly. The blower provided by the utility model has a remarkable heat dissipation effect, and also has a protective effect on the circuit board while discharging the heat generated by the operation of the brushless motor in time, thereby reducing the risk of affecting the normal operation due to the damage of the electrical components on the circuit board.

Description

Blower and car air conditioning assembly

technical field

The utility model relates to the technical field of fans, in particular to a blower and an automobile air-conditioning assembly.

Background technique

HVAC (Heating, Ventilation and Air Conditioning, heating ventilation and air conditioning) system is used to realize the cooling, heating, ventilation and air purification of the air in the cabin of the car, so as to provide a comfortable riding environment for the passengers. However, the existing brushless blower motor used in the HVAC system will generate heat during operation. If this part of the heat cannot be discharged in time, it may cause the circuit board to overheat, thereby damaging the electrical components on the circuit board. The brush motor works normally.

Utility model content

Based on this, it is necessary to have a blower with a significant heat dissipation effect, which can not only discharge the heat generated by the operation of the brushless motor in time, but also have a protective effect on the circuit board, thereby reducing the risk of affecting the normal operation due to damage to the electrical components on the circuit board.

A blower includes a mounting base configured with a cavity, a support plate separating the cavity into a circuit cavity and an assembly cavity, a circuit board disposed in the circuit cavity and attached to the support plate, and a a stator and rotor assembly located in the assembly cavity and fixed to the support plate; an air flow channel in fluid communication with the assembly cavity is constructed on the installation base, and used to flow from the outside of the blower to the assembly cavity Guided air flow; wherein, at least part of the air flow introduced into the assembly cavity through the air flow channel can flow through the side of the support plate facing the assembly cavity to dissipate heat from the circuit board, and be introduced through the air flow channel The airflow of the assembly cavity is discharged from the mounting base after passing through the stator and rotor assembly.

In the above-mentioned blower, the heat generated by the circuit board can be transferred to the support plate, and when the air flow is introduced into the assembly cavity along the airflow channel, it can blow through the support plate to take away the heat, so as to realize the heat dissipation of the circuit board; The channel is isolated, and the airflow for heat dissipation will not directly blow through the circuit board, which not only meets the heat dissipation of the circuit board, but also has a protective effect on the circuit board to prevent the airflow from blowing and damaging the electrical components. When the airflow blows through the support plate and flows out through the stator and rotor assemblies, it can also take away the heat generated during the operation of the stator and rotor assemblies to meet the multi-position heat dissipation requirements. Moreover, it is precisely because of the specific flow trajectory of the air flow in the cavity that the air flow first dissipates the heat of the circuit board, giving priority to preventing the circuit board from being damaged due to overheating, because the stator and rotor components cannot operate normally after the circuit board is damaged.

In one embodiment, the support plate is provided with a mounting hole for connecting the circuit board, and the mounting hole is protruded from an edge of one side of the circuit board to connect the circuit board to the support. A gap is formed between the plates, and the gap is filled with a thermally conductive medium.

In one embodiment, the protruding length of the edge of the mounting hole is between 0.3 mm and 0.5 mm, and the protruding end of the edge of the mounting hole has a rounded transition.

In one embodiment, a plurality of heat dissipation fins distributed in a scattering shape with the axis of the stator and rotor assembly as the center are provided on the side of the support plate facing away from the circuit board.

In one embodiment, the height of each of the heat dissipation fins in the thickness direction of the support plate is between 6 mm and 7 mm, and the height close to the axis is smaller than the height away from the axis.

In one embodiment, an electrical component is arranged on the circuit board, the electrical component includes at least one of a chip, a diode and a capacitor, and the electrical component is arranged on the circuit board close to the air intake in the cavity one end.

In one of the embodiments, the installation base includes a top cover and a rear cover connected to the top cover, the top cover and the rear cover together enclose the cavity, and the top cover encloses the cavity A flange is protruded radially inward on the cavity wall of the cavity, a sealing ring is pressed between the flange and the support plate, and the air inlet of the airflow channel is arranged on the top cover.

In one of the embodiments, the blower further includes an impeller assembly drivingly connected to the stator and rotor assembly, the impeller assembly includes a bottom support plate for supporting the blades, the stator and rotor assembly includes an outer plate configured with openings A rotor casing, a return air gap communicating with the airflow channel is constructed between the outer rotor casing and the bottom support plate; the airflow flowing through the stator and rotor assembly is discharged to the return air gap through the opening , to be derived from the blower.

In one embodiment, the stator-rotor assembly includes an output shaft and a stator accommodated inside the outer rotor casing, and the output shaft passes through the stator and is connected to the outer rotor casing;

The stator is mounted on the support plate, the windings on the stator are electrically connected to the circuit board through wires, and the outer rotor casing is drive-connected to the impeller assembly through the output shaft.

In one embodiment, the bottom support plate is provided with a concave curved surface along the direction toward the top ring, and the outer rotor shell is provided with a convex curved surface matching the bottom support plate; the back A wind gap is located between the concave curved surface and the convex curved surface.

In one embodiment, a first extension section extends radially outward from the top cover, and the first extension section is configured with an extension cavity that communicates with the assembly cavity, and the air inlet is provided in the first extension section. An extension end of an extension section communicates with the extension cavity.

In one embodiment, the rear cover extends radially outward with a second extension section adapted to the first extension section, a side of the extension cavity facing the rear cover is open, and the extension cavity is open. The open edge is pressed on the second extension segment; one of the first extension segment and the second extension segment is provided with a clamping protrusion, and the other is provided with a clamping arm with a clamping hole, so The clamping arm is clamped to the clamping protrusion through the clamping hole.

In one embodiment, the protruding thickness of the latching protrusion is gradually reduced along the insertion direction of the top cover.

In one of the embodiments, the second extending section is configured with a flow guiding protrusion near the cavity.

In one embodiment, the top cover is protruded with a water retaining rib, and the water retaining rib is surrounded by the edge of the cavity, and the protruding height of the water retaining rib is between 6mm-7mm .

In one embodiment, the lower bottom surface of the bottom support plate is protruded with a plurality of arc-shaped baffles arranged at intervals around the axis of the bottom support plate, and the extending end of each arc-shaped baffle is protruded along itself. The direction extends to extend into the inner side of the water retaining bar.

In one embodiment, a drainage channel and a drainage hole communicating with the drainage channel are provided on the top cover on the outer side of the water retaining bar, and the drainage channel is connected to the water retaining bar. Transition between bottoms by flat or inclined planes.

In one embodiment, a shock-absorbing seat is pressed between the top cover and the rear cover, one of the shock-absorbing seat and the support plate is provided with a connecting arm, and the other is provided with a mounting arm slot, the connecting arm is inserted into the installation slot.

In one embodiment, the middle part of the shock-absorbing seat is annularly recessed to form the installation groove, the connecting arm includes two arc-shaped claws that are smoothly transitioned and spaced apart, and the two arc-shaped claws are inserted into in the installation groove and clamped on both radial sides of the shock absorber.

The present invention also provides an automobile air-conditioning assembly, which can alleviate at least one of the above technical problems.

An automobile air-conditioning assembly includes an air-conditioning flow channel and the above-mentioned blower, and airflow can flow along the air-conditioning flow channel under the power of the blower; the air-conditioning flow channel is provided with a branch in fluid communication therewith, and the The branch is in fluid communication with the airflow channel.

Description of drawings

1 is a schematic diagram of a blower provided by an embodiment of the present utility model;

Figure 2 is a top view of the blower provided in Figure 1;

Figure 3 is a bottom view of the blower provided in Figure 1;

Figure 4 is a cross-sectional view along A-A of the blower provided in Figure 3;

Fig. 5a is a partial enlarged view at B in Fig. 4;

Fig. 5b is a partial enlarged view at C in Fig. 4;

Figure 6a is a partial exploded view of the blower provided in Figure 1;

Figure 6b is a first partial schematic view of the blower provided in Figure 1;

Fig. 7a is the first schematic diagram of the top cover in the blower provided in Fig. 1;

Figure 7b is a second schematic view of the top cover in the blower provided in Figure 1;

Fig. 8a is the first schematic diagram of the rear cover in the blower provided in Fig. 1;

Figure 8b is a second schematic diagram of the rear cover in the blower provided in Figure 1;

Fig. 9 is the schematic diagram of the impeller assembly in the blower provided in Fig. 1;

Figure 10 is a second partial schematic view of the blower provided in Figure 1;

Figure 11 is an exploded view of the stator and rotor assembly in the blower provided in Figure 1;

FIG. 12 is a schematic diagram of a blower provided with a branch circuit according to an embodiment of the present invention.

Reference numerals: 10-circuit board; 12-thermal conduction medium; 20-stator and rotor assembly; 21-outer rotor shell; 22-stator; 23-winding; 24-support; 25-magnet; 26-output shaft; 27-bearing ;28-wire plug;29-wire;30-impeller assembly;31-wheel frame;32-blade;40-installation base;41-top cover;42-back cover;44-shock absorber;50-support plate ;51-connecting arm;52-radiating fin;53-assembly hole;60-sealing ring;70-return air gap;211-opening hole;311-bottom support plate;312-top ring;401-cavity; 402-air flow channel; 403-air inlet; 404-accommodating groove; 410-through hole; 411-water retaining rib; 412-flange; 413-drainage channel; 417-First extension; 418-Positioning post; 420-Depressed groove; 421-Annular clamping groove; 422-Card arm; 423-Second extension; 424-Avoidance groove; ;442-fixing hole;501-adapting hole one;511-arc claw;1000-blower;2000-branch;3111-arc baffle;4011-circuit cavity;4012-assembly cavity;4121-ring groove; 4171 - extension cavity; 4221 - snap hole.

Detailed ways

In order to make the above objects, features and advantages of the present utility model more clearly understood, the specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many ways different from those described here, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not subject to the specific embodiments disclosed below. limit.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" ", "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated A device or element must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "installation", "connection", "connection", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection connected, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction between the two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features through an intermediary indirect contact. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

In the existing automotive HVAC systems, brushless motors are mostly used to drive the impeller to rotate, so as to realize temperature change (cooling or heating), air exchange or purification in the cabin, and provide a comfortable riding environment for passengers. However, the brushless blower motor in the automotive HVAC system will generate heat during operation. If this part of the heat cannot be discharged in time, it may cause the circuit board to overheat, thereby damaging the electrical components on the circuit board and affecting the normal use of the brushless motor. In view of this, as shown in FIG. 1, an embodiment of the present invention provides a blower 1000, which not only discharges the heat generated by the operation of the brushless motor in time, but also has a protective effect on the circuit board, thereby reducing the damage caused by the circuit board. Risk of damage to electrical components affecting normal operation. The blower 1000 will be described in detail below.

As shown in FIGS. 1 , 2 and 4 , a blower 1000 provided by an embodiment of the present invention includes a mounting base 40 configured with a cavity 401 , and a support plate that isolates the cavity 401 into a circuit cavity 4011 and an assembly cavity 4012 50 , the circuit board 10 disposed in the circuit cavity 4011 and attached to the support plate 50 , and the stator-rotor assembly 20 disposed in the assembly cavity 4012 and fixed to the support plate 50 . The mounting base 40 is constructed with an airflow channel 402 that is in fluid communication with the mounting cavity 4012, and is used to guide airflow from the outside of the blower 1000 to the mounting cavity 4012; wherein, at least part of the airflow introduced into the mounting cavity 4012 through the airflow channel 402 can The side facing the mounting cavity 4012 through the support plate 50 dissipates heat from the circuit board 10 , and the airflow introduced into the mounting cavity 4012 through the airflow channel 402 flows through the stator and rotor assembly 20 and is discharged from the mounting base 40 .

Specifically, the heat generated by the circuit board 10 can be transferred to the support plate 50, and the air flow can be blown through the support plate 50 after being introduced into the assembly cavity 4012 along the air flow channel 402 to take away the heat transferred from the circuit board 10 to the support plate 50, so as to achieve the Heat dissipation of the circuit board 10 . Moreover, the support plate 50 isolates the circuit cavity 4011 from the airflow channel 402, so that the airflow for heat dissipation will not directly blow through the circuit board 10, which not only satisfies the heat dissipation of the circuit board 10, but also has a protective effect on the electrical components on it. Anti-air blowing damage to electrical components. At the same time, when the airflow flows out through the stator and rotor assembly 20, it can also take away the heat generated during the operation of the stator and rotor assembly 20 to meet the multi-position heat dissipation requirements; The circuit board 10 is first dissipated through the support plate 50 to prevent the circuit board 10 from being overheated and damaged. Because the stator-rotor assembly 20 cannot operate normally after the circuit board 10 is damaged, such an arrangement can also realize the prioritization of heat dissipation requirements and further improve the heat dissipation effect. The arrow in FIG. 4 indicates the flow direction of the airflow entering the assembly cavity 4012 through the airflow channel 402 . It should be noted that the circuit board 10 may be directly attached to the support plate 50, or may be attached to the support plate 50 through thermal conductive mud.

As shown in FIG. 4 , FIG. 5 a and FIG. 6 b , in some embodiments, the support plate 50 is provided with a mounting hole 53 for connecting the circuit board, and the mounting hole 53 is protruded toward the edge of the side of the circuit board 10 to make the circuit board A gap is formed between the 10 and the support plate 50 , and the gap is filled with the thermally conductive medium 12 . Specifically, it is equivalent to protruding a step on the edge of the mounting hole 53 , abutting between the support plate 50 and the circuit board 10 so that there is a gap between them, so as to fully fill the thermally conductive medium 12 . At the same time, the disposition of the heat conducting medium 12 improves the heat conduction efficiency from the circuit board 10 to the support plate 50 , so as to transfer more heat from the circuit board 10 to the support plate 50 . In a specific embodiment, the circuit board 10 is fastened on the support plate 50 by screws. The number of the mounting holes 53 is three, and they are evenly spaced around the axis of the circuit board 10 , and each mounting hole 53 is correspondingly connected with a screw. In this way, not only the connection reliability of the circuit board 10 relative to the support board 50 is improved, but also the gap between the circuit board 10 and the support board 50 is uniformly distributed, so that the thermally conductive medium 12 is evenly covered between the circuit board 10 and the support board 50 . The thermally conductive medium 12 is a thermally conductive silicone sheet or a thermally conductive double-sided adhesive. In other embodiments, on the premise of ensuring that the electrical components on the circuit board 10 do not interfere, the edges of the screw holes on the circuit board 10 for passing the screws may also be protruded to meet the above-mentioned setting of the gap.

As shown in FIG. 4 , FIG. 5 a and FIG. 6 b , in some embodiments, the protruding length of the edge of the mounting hole 53 is between 0.3 mm and 0.5 mm, and the protruding end of the edge of the mounting hole 53 has a rounded transition. That is to say, by limiting the height of the protruding steps, while satisfying the existence of the gap between the support plate 50 and the circuit board 10 , it also ensures that the circuit board 10 is installed stably relative to the support plate 50 , and there will be no problem caused by the operation of the stator and rotor assembly 20 . Large shaking affects the circuit board 10 . At the same time, through the transition of the rounded corners, the sharpness here is weakened, and the wear on the circuit board 10 is reduced. In a specific embodiment, the protruding length of the edge of the mounting hole 53 is 0.3 mm, 0.34 mm, 0.45 mm or 0.5 mm.

As shown in FIG. 4 and FIG. 6 a , in some embodiments, the side of the support plate 50 away from the circuit board 10 is provided with a plurality of heat dissipation fins 52 distributed in a scattering shape with the axis of the stator and rotor assembly 20 as the center. The disposition of the heat dissipation fins 52 can increase the contact area of the support plate 50 compared to the airflow, thereby improving the heat dissipation performance of the circuit board 10 . At the same time, the cooling fins 52 also have a guiding function, which can smoothly guide the air flow to the bottom of the stator and rotor assembly 20, and make the air flow through the gap of the stator and rotor assembly 20 as much as possible, thereby enhancing the cooling effect. Wherein, each of the heat dissipation fins 52 is arranged in an arc shape, so that when the plurality of heat dissipation fins 52 are arranged at intervals, the turbulence between the heat dissipation fins 52 and the airflow is increased, so that the contact between the heat dissipation fins 52 and the airflow is more sufficient and long-lasting. , improve the cooling effect. In a specific embodiment, the height of each heat dissipation fin 52 along the thickness direction of the support plate 50 is between 6 mm and 7 mm, and the height near the axis is smaller than the height away from the axis. By limiting the height of the heat dissipation fins 52 to satisfy the enhanced heat dissipation effect, the assembly of the stator and rotor assemblies 20 will not be interfered with. The height of the heat dissipation fins 52 is 6 mm, 6.6 mm or 7 mm, and the height near the axis is half lower than the height away from the axis.

In some embodiments, the electrical components on the circuit board 10 are disposed at an end of the circuit board 10 close to the air intake in the cavity 401 , and the electrical components include at least one of a chip, a diode and a capacitor. With this arrangement, the electrical components with high energy consumption on the circuit board 40 are located on the side of the air intake so as to be fully and preferentially contacted with the heat dissipation airflow, thereby improving the heat dissipation performance.

4, 7a, 7b, 8a and 8b, in some embodiments, the mounting base 40 includes a top cover 41 and a back cover 42 connected to the top cover 41, the top cover 41 and the back cover 42 A cavity 401 is formed together, and a flange 412 is protruded radially inward on the cavity wall of the top cover 41 to form the cavity 401 , and a sealing ring 60 is pressed between the flange 412 and the support plate 50 , and the airflow channel 402 The air inlet is arranged on the top cover 41 . Specifically, the top cover 41 and the rear cover 42 are snapped together to form the mounting base 40, so as to facilitate its disassembly, maintenance, and replacement. The flange 412 and the sealing ring 60 are arranged so as to seal the connection between the top cover 41 and the support plate 50 , so as to satisfy the airtight isolation of the circuit cavity 4011 from the assembly cavity 4012 . At this time, even if water flows into the assembly cavity 4012 or the airflow for heat dissipation carries moisture, it can be prevented from infiltrating the gap between the support plate 50 and the top cover 41, preventing moisture from adhering to the circuit board 10 and improving the waterproof performance. . A ring groove 4121 for clamping the sealing ring 60 is provided on the side of the flange 412 facing the support plate 50 . The air inlet 403 is disposed relative to the top cover 41 so that the air inlet for introducing the air flow into the assembly cavity 4012 and the air outlet for leading out the assembly cavity 4012 are isolated from each other. In other embodiments, a packing seal may be provided between flange 412 and support plate 50 . Meanwhile, the ring groove 4121 can be arranged on the upper surface of the flange 412; or, the flange 412 forms a slot, and a U-shaped sealing ring is installed in the slot, and the edge of the support plate 50 is inserted into the slot. Inside.

As shown in FIGS. 4 , 7 a , 7 b , 8 a and 8 b , in a specific embodiment, a through hole 410 is formed in the middle of the top cover 41 , and a through hole 410 is formed in the middle of the rear cover 42 coaxially with the through hole 410 . The provided concave grooves 420 together enclose the cavity 401 of the mounting base 40 . The support plate 50 is disposed at the junction of the top cover 41 and the back cover 42 , and when the outer circumferential surface of the support plate 50 abuts on the side wall of the recessed groove 420 , the circuit cavity 4011 is formed by the recessed groove 420 of the back cover 42 and the recessed groove 420 . The support plate 50 is jointly defined, and the assembly cavity 4012 is jointly defined by the upper surface of the support plate 50 and the through hole 410 of the top cover 41 . The bottom of the recessed groove 420 may also be provided with a circular hole to penetrate through it. At this time, after the support plate 50 and the stator and rotor assembly 20 are assembled relative to the mounting base 40, a rubber pad is sealed at the circular hole of the rear cover 42 to prevent Make sure that the circuit cavity 4011 has a good seal. At the same time, if the radially inward extension of the flange 412 is relatively large, after the support plate 50 is pressed and sealed relative to the flange 412 , the circuit cavity 4011 is formed by the recessed groove 420 of the rear cover 42 , part of the flange 412 and the support plate 50 . limited.

As shown in FIGS. 4, 6a, 6b, 7a and 7b, in some embodiments, a shock absorbing seat 44 is pressed between the top cover 41 and the rear cover 42, and the shock absorbing seat 44 is provided with a mounting groove 441, The support plate 50 is provided with a connecting arm 51 , and the connecting arm 51 is inserted into the installation groove 441 . Through this arrangement, the support plate 50 is fixedly installed relative to the installation base 40 to support the stator and rotor assemblies 20 and meet the sealing requirement that the support plate 50 is pressed against the flange 412 . At the same time, the shock absorber 44 is used to shock the support plate 50 . When the vehicle shakes and causes the mounting base 40 to shake, the shock absorber 44 can buffer the vibration transmitted from the mounting base 40 to the support plate 50 , so that the stator and rotor assemblies 20 The normal operation is maintained based on the above-mentioned damping effect. Wherein, each shock absorbing seat 44 is configured with a fixing hole 442 along its own axis, the top cover 41 and the rear cover 42 are provided with accommodating grooves 404, and the accommodating grooves 404 on the top cover 41 are protruded with through-holes 404. the positioning post 418 through the fixing hole 442 . In actual use, after the support plate 50 is assembled relative to the shock-absorbing seat 44, the shock-absorbing seat 44 is put on the positioning post 418 through the fixing hole 442, and then the top cover 41 is pressed against the rear cover 42, and bolts are used to pass through the rear cover 42. The positioning post 418 and the top cover 41 are locked with the nut. Wherein, in order to facilitate bolt assembly, an escape groove 424 for installing bolts is provided on the outer side wall of the rear cover 42 .

As shown in FIGS. 6a and 6b, in a specific embodiment, the middle of the shock absorber 44 is annularly recessed to form a mounting groove 441, and the connecting arm 51 includes two arc-shaped claws 511 that are smoothly transitioned and spaced apart. The arc-shaped claws 511 are inserted into the installation grooves 441 and clamped on both radial sides of the shock absorber 44 . Specifically, the installation groove 441 is provided in the middle of the shock absorber 44 . The two arc-shaped claws 511 form a "C" shape and extend into the mounting groove 441 and then hug the shock-absorbing seat 44. While satisfying the assembly of the connecting arm 51 relative to the shock-absorbing seat 44, the relative shock absorption of the connecting arm 51 is increased. The contact area of the seat 44 improves the connection reliability. Further, the installation groove 441 is an annular groove, so that the shock absorber 44 can be adapted to the connecting arm 51 along its own circumferential direction. Further, the width of the mounting groove 441 along the axial direction of the shock absorber 44 is substantially the same as the thickness of the connecting arm 51 to increase the friction between the connecting arm 51 and the groove wall of the mounting groove 441 and improve the connection reliability. Meanwhile, the thickness of the connecting arm 51 can be the same as the thickness of the support plate 50 itself; or the thickness of the connecting arm 51 is smaller than the thickness of the support plate 50 itself, then the thickness of the support plate 50 is greater than the width of the installation slot 441 , thereby increasing the support plate 50 Compared with the pressing force of the top cover 41, the sealing performance between the two is enhanced. In yet another specific embodiment, the number of the connecting arms 51 is three, and the three connecting arms 51 are evenly spaced along the circumferential direction of the support plate 50 and correspond to the three shock-absorbing seats 44 on the mounting base 40 respectively. Such an arrangement constitutes a triangular connection point and improves the connection stability between the top cover 41 , the rear cover 42 and the support plate 50 .

In other embodiments, the installation groove 441 may also be provided at the edge of the support plate 50 , that is, the edge cross section of the support plate 50 is U-shaped. The connecting arm 51 extends from the shock-absorbing seat 44 toward the cavity 401 of the mounting base 40 to be inserted into the mounting groove 441 . In yet another embodiment, the edge of the support plate 50 is directly inserted between the top cover 41 and the rear cover 42 , and is pressed and reduced between the support plate 50 and the top cover 41 and between the support plate 50 and the rear cover 42 The shock pad is fastened by bolts through the rear cover 42 , the support plate 50 and the top plate by locking with nuts. At this time, an annular sealing ring 60 is pressed on the pressing surface of the support plate 50 and the top cover 41 to ensure that the two are in a sealed connection state.

As shown in FIGS. 4 , 7a , 7b , 8a and 8b , in some embodiments, the top cover 41 extends radially outward with a first extension section 417 , and the first extension section 417 is configured with an assembly cavity 4012 is connected to the extension cavity 4171, and the air inlet 403 is disposed at the extension end of the first extension section 417 and communicates with the extension cavity 4171. This arrangement makes the air inlet 403 of the airflow channel 402 far away from the air outlet from the assembly cavity 4012, which ensures that the cooling airflow can only flow in a single direction without bidirectional turbulence. Wherein, an opening is formed on the hole wall of the through hole 410 of the top cover 41 to communicate the extension cavity 4171 with the through hole 410 .

As shown in FIGS. 4, 7a, 7b, 8a and 8b, in yet another embodiment, the rear cover 42 extends radially outward with a second extension section 423 adapted to the first extension section 417, The side of the extension cavity 4171 facing the rear cover 42 is open, and the edge of the opening is pressed on the second extension section 423 . Specifically, after the top cover 41 is fastened to the rear cover 42 , the bottom of the extension cavity 4171 is pressed against the second extension section 423 to define the airflow channel 402 , and also facilitates cleaning of the extension cavity 4171 . The arrangement of the snap protrusions 416 and the snap arms 422 satisfies the tightening requirements of the first extension section 417 relative to the second extension section 423 . In yet another embodiment, the second extending section 423 is configured with a guide protrusion near the cavity 401 to guide the airflow flowing along the airflow channel 402 so that it can flow to the support plate 50 more fully to achieve heat dissipation . In actual use, after the top cover 41 is assembled relative to the rear cover 42, the upper surface of the flange 412 of the top cover 41 is partially higher than the second extension section 423, so that a step is formed between the two, and the diversion protrusion is just right The second extension section 423 is provided at a position close to the step. The guide protrusion has two guide surfaces inclined along the upper right and the lower right. This arrangement not only facilitates the airflow to flow into the assembly cavity 4012 over the steps to fully contact the support plate 50 and the heat dissipation fins 52, but also facilitates the adhesion of the The moisture at the above steps acts as a barrier, so that it will not penetrate into the circuit cavity 4011 from the steps. In other embodiments, the bottom of the extension cavity 4171 is closed, that is, the first extension section 417 is configured with an L-shaped extension cavity 4171 to improve sealing.

As shown in FIGS. 4, 7a, 7b, 8a and 8b, in a specific embodiment, the rear cover 42 is provided with an annular snap groove 421 along its circumferential direction, and the bottom of the top cover 41 is inserted into the When inside the annular clamping groove 421 , the clamping arm 422 is clamped to the clamping protrusion 416 through the clamping hole 4221 . At the same time, the aforementioned bolts pass through the rear cover 42 , the shock absorber 44 and the top cover 41 and are locked with nuts, so as to realize the detachable connection of the top cover 41 to the rear cover 42 and facilitate the disassembly and maintenance of the top cover 41 and the rear cover 42 . Wherein, when the blower 1000 is placed in the vertical direction, the clamping arm 422 extends upward along the vertical direction, and the clamping hole 4221 is formed at the upper position of the clamping arm 422 . In yet another specific embodiment, the protruding thickness of the latching protrusions 416 gradually decreases along the insertion direction of the top cover 41 . That is to say, an inclined surface is formed on the latching protrusion 416 to weaken the resistance when the top cover 41 is inserted relative to the rear cover 42 , and can gradually pass through the latching hole 4221 and engage with the latching arm 422 while satisfying the insertion and buckle setting. . In yet another specific embodiment, the upper surface of the top cover 41 and the lower surface of the rear cover 42 are provided with weight-reducing structures to satisfy the lightweight design. In other embodiments, the top cover 41 and the rear cover 42 of the mounting base 40 may be integrally formed by injection molding. The latching protrusion 416 is disposed on the second extending section 423 , and the latching arm 422 is disposed on the first extending section 417 and extends downward.

As shown in FIGS. 4 , 9 and 10 , in some embodiments, the blower 100 further includes an impeller assembly 30 drivingly connected to the stator and rotor assembly 20 . The impeller assembly 30 includes a bottom support plate 311 for supporting the blades 32 , the stator and rotor assembly 20 includes an outer rotor shell 21 configured with openings 211 , and there is a space between the hole wall of the through hole 410 on the top cover 41 and the outer rotor shell 21 Space 1001. A return air gap 70 is configured between the outer rotor shell 21 and the bottom support plate 311 , which is communicated with the airflow channel 402 , and the airflow flowing through the stator and rotor assembly 20 is discharged to the return air gap 70 through the opening 211 to be led out from the blower 1000 . . That is to say, the setting of the air return gap 70 increases the guiding effect of the air flowing out through the opening 211 , so that the air is discharged to the target position, and does not flow back into the assembly cavity 4012 . Specifically, the impeller assembly 30 includes a wheel frame 31 and a plurality of blades 32 arranged at intervals around the axis of the wheel frame 31 on the wheel frame 31 . The wheel frame 31 includes a bottom support plate 311 and a top ring 312 that are opposite and spaced apart. A plurality of blades 32 are installed between the bottom support plate 311 and the top ring 312 , and each blade 32 is along the radial direction of the bottom support plate 311 . Extend part. In this way, not only there is a gap between any two adjacent vanes 32, but also the bottom of the impeller assembly 30 has a gap defined by any two adjacent vanes 32 and the edge of the bottom support plate 311, the impeller assembly 30 works At this time, part of the water flow will be thrown out from the above two gaps and attached to the top cover 41 under the action of centrifugal force. If this part of the water flow is not discharged in time, it may penetrate into the circuit board 10 through the opening 211 or the separation space 1001 . Therefore, when the airflow flows out along the air return gap 70 , the water flow out of the bottom gap of the impeller assembly 30 has an outward blowing force, so as to change the direction of the water flow so that it does not enter along the opening 211 or the space 1001 . The arrows in Fig. 4 point to the flow direction of the airflow.

As shown in FIGS. 10 and 11 , in some embodiments, the stator and rotor assembly 20 includes an output shaft 26 and a stator 22 accommodated inside the outer rotor casing 21 , and the output shaft 26 passes through the stator 22 and is connected to the outer rotor casing 21 . The stator 22 is mounted on the support plate 50 , the windings 23 on the stator 22 are electrically connected to the circuit board 10 through the wires 29 , and the outer rotor shell 21 is drivingly connected to the impeller assembly 30 through the output shaft 26 . Specifically, the middle of the support plate 50 is configured with an adapter hole 1 501 , the stator 22 is mounted on the support plate 50 through the bracket 24 , and the bottom of the bracket 24 is connected to the hole wall through the adapter hole 1 501 . The circuit board 10 is provided with a second fitting hole for the bracket 24 to pass through. The bracket 24 is configured with a mounting hole. The output shaft 26 passes through the mounting hole to be rotatably connected to the bracket 24 through a bearing 27. The bottom end of the output shaft 26 extends into into the circuit cavity 4011. The outer rotor casing 21 is connected to the output shaft 26 , and the magnets 25 are fixed on the inner side wall of the outer rotor casing 21 . The windings 23 installed on the stator 22 are connected to the circuit board 10 through wires 29, so as to realize the electrical control of the stator and rotor assembly 20 by the circuit board 10. The bottom support plate 311 in the impeller assembly 30 is configured with a rotating hole to connect with the output shaft. 26 drive connection, so as to meet the working requirements of the stator and rotor assembly 20 and drive the impeller assembly 30. The wire 29 connected between the winding 23 and the circuit board 10 is electrically connected to the circuit board 10 through the support plate 50, so the wire plug 28 is embedded in the wire hole on the support plate 50 for the wire 29 to pass through, so as to improve the sealing sex.

As shown in FIG. 4 , FIG. 9 and FIG. 10 , in some embodiments, the bottom support plate 311 is provided with a concave curved surface along the direction toward the top ring 312 , and the outer rotor shell 21 has a convex shape matching the bottom support plate 311 . Start the surface setting. The air return gap 70 is located between the concave curved surface and the convex curved surface. Such arrangement makes a U-shaped air duct formed in the blower 1000 to reduce the noise when the airflow flows. At the same time, the concave curved surface arrangement changes the contact area of the impeller assembly 30 acting on the airflow, that is, changes the volume of the impeller assembly 30 compared to the airflow, thereby making it easier for the impeller assembly 30 to output accelerated airflow. The convex curved surface and the concave curved surface are matched to ensure that the gaps between the two are substantially equal, thereby defining the above-mentioned air return gap 70 .

As shown in FIG. 4 and FIG. 7a, in some embodiments, the top cover 41 is protruded with water retaining ribs 411, and the water retaining ribs 411 are surrounded by the edge of the cavity 401, and the protruding height of the water retaining ribs 411 is Between 6mm-7mm. That is to say, the water retaining ribs 411 are arranged around the edge of the through hole 410 on the top cover 41, so as to block the water flow thrown out under the centrifugal force of the impeller assembly 30, and reduce its entry into the through hole 410 or the fixed water flow. Risk of rotor assembly 20 . At the same time, the limitation of the protruding height of the water retaining ribs 411 can effectively prevent the water flow from entering the through holes 410 of the top cover 41 or the stator and rotor assemblies 20 and infiltrating the circuit board 10 without interfering with the impeller assembly 30 . Moreover, because the water blocking ribs 411 are arranged on the downstream air path of the air return gap 70, combined with the outward blowing force of the airflow on the water flow, the overall waterproof effect is improved. In a specific embodiment, the height of the water retaining ribs 411 is 6 mm, 6.3 mm, 6.7 mm or 7 mm. Preferably, the height of the water retaining rib 411 is 6.7 mm, and at this time, the top of the water retaining rib 411 and the bottom of the impeller assembly 30 still maintain a safe distance.

As shown in FIG. 4 , FIG. 5 b , FIG. 7 a and FIG. 9 , in some embodiments, the lower bottom surface of the bottom support plate 311 is protruded with a plurality of arc baffles 3111 arranged at intervals around the axis of the bottom support plate 311 , at least part of The extending end of the arc-shaped baffle plate 3111 extends along its own protruding direction to protrude into the inner side of the water retaining rib 411 . Specifically, the plurality of arc-shaped baffles 3111 have a guiding effect on the flow of air, and form a circuitous air duct at the air return gap 70, while changing the air flow velocity through the change of the air duct, it promotes more air to flow to any phase. The space between the two adjacent arc-shaped baffles 3111 can flow out from the unobstructed position to increase the airflow there, so as to more fully act on the water flow out of the gap at the bottom of the impeller assembly 30 .

As shown in FIGS. 2 , 3 , 4 , 7 a and 7 b , in some embodiments, a drainage channel 413 and a drainage hole communicating with the drainage channel 413 are provided on the top cover 41 on the outer side of the water retaining rib 411 . 415. That is to say, the arrangement of the drainage channel 413 is convenient to gather the water flow blocked by the water retaining ribs 411, and flow to the drainage hole 415 along the water flow, and then be completely discharged. The drainage channel 413 is arranged at the edge of the top cover 41 , and three sinking grooves 414 are arranged at intervals in the drainage channel 413 , and the drainage holes 415 are arranged at the bottom of the sinking slot 414 . The disposition of the sinking groove 414 forms a gap in the drainage channel 413 for converging the water flow to discharge, thereby improving the drainage performance. Wherein, the outer ring side of the drainage channel 413 protrudes radially outward at the sinking groove 414 to increase the converging space of the sinking groove 414 . At the same time, a plane transition is formed between the drainage channel 413 and the bottom of the water retaining rib 411 . The plane transition is relatively gentle, so that the water flow can flow from the water retaining rib 411 to the drainage channel 413 smoothly and freely, and in the process of flowing, part of the dynamic potential energy thrown by the water flow under the action of centrifugal force can be consumed to reduce the splash of the water flow. In other embodiments, an inclined surface transitions between the drainage channel 413 and the bottom of the water retaining rib 411 to guide the water flow to flow to the drainage channel 413 quickly and improve the drainage efficiency. Wherein, when the inclined plane transitions, the inclination angle of the inclined plane is not more than 5 degrees. For example, the inclination angle of the inclined plane is 1.5 degrees, 3 degrees or 5 degrees.

As shown in FIG. 12 , another embodiment of the present invention further provides an automobile air conditioner assembly, which includes an air conditioner flow channel and the above-mentioned blower 1000 . The air flow can flow along the air conditioner flow channel under the power of the blower 1000 . The air-conditioning flow channel is provided with a branch circuit 2000 in fluid communication therewith, and the branch circuit 2000 is in fluid communication with the airflow channel 402 on the installation base 40 . That is to say, by using the above-mentioned blower 1000 as the power source for the operation of the automobile air conditioning assembly, it also has good waterproof performance and heat dissipation performance while satisfying the temperature change, ventilation and purification in the cabin. The branch 2000 is connected to the air inlet 403 of the airflow channel 402, so that the high-speed airflow generated by the impeller assembly 30 not only flows into the cabin along the air-conditioning flow channel, but also partially flows along the branch 2000 to the airflow channel 402 for the circuit board 10, fixed The heat dissipation of the rotor assembly 20 eliminates the need for external heat dissipation airflow, which simplifies the structure. Among them, the arrow in FIG. 12 is the airflow direction.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present utility model, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the utility model patent. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (20)

1. a blower, is characterized in that, comprises: A mounting base (40) configured with a cavity (401), and a support plate (50) for isolating the cavity (401) into a circuit cavity (4011) and an assembly cavity (4012), provided in the circuit cavity (4011) 4011) and a circuit board (10) attached to the support plate (50), and a stator and rotor assembly (20) provided in the assembly cavity (4012) and fixed to the support plate (50); The mounting base (40) is configured with an air flow channel (402) in fluid communication with the mounting cavity (4012) for guiding from the outside of the blower (1000) into the mounting cavity (4012) Air flow; wherein, at least part of the air flow introduced into the assembly cavity (4012) through the air flow channel (402) can flow through the side of the support plate (50) toward the assembly cavity (4012) to dissipate the heat The circuit board (10), and the air flow introduced into the assembly cavity (4012) through the air flow channel (402) is discharged from the mounting base (40) after passing through the stator and rotor assembly (20). 2 . The blower according to claim 1 , wherein the support plate ( 50 ) is provided with an assembly hole ( 53 ) for connecting the circuit board ( 10 ), and the assembly hole ( 53 ) faces the An edge of one side of the circuit board (10) is protruded to form a gap between the circuit board (10) and the support plate (50), and the gap is filled with a thermally conductive medium (12). 3. The blower according to claim 2, characterized in that, the length of the projection on the edge of the assembly hole (53) is between 0.3mm-0.5mm, and the convex end of the edge of the assembly hole (53) is rounded corner transition. 4. The blower according to claim 1 or 2, characterized in that, a side of the support plate (50) facing away from the circuit board (10) is provided with a centering on the axis of the stator and rotor assembly (20) A plurality of radiating fins (52) are distributed in a scattering shape, and the radiating fins (52) are arc-shaped. 5. The blower according to claim 4, characterized in that, the height of each of the heat dissipation fins (52) along the thickness direction of the support plate (50) is between 6mm-7mm, and is close to the axis is less than the height away from the axis. 6. The blower according to claim 1, characterized in that, an electrical component is provided on the circuit board (10), the electrical component comprises at least one of a chip, a diode and a capacitor, and the electrical component is arranged on the The circuit board (10) is close to one end of the cavity (401) where the air enters. 7. The blower according to claim 1 or 6, wherein the installation base (40) comprises a top cover (41) and a rear cover (42) connected to the top cover (41), the The top cover (41) and the rear cover (42) are jointly formed to form the cavity (401); The top cover (41) encloses the cavity (401) and is provided with a flange (412) protruding radially inward on the cavity wall, and the flange (412) is pressed against the support plate (50). A sealing ring (60) is provided, and the air inlet (403) of the airflow channel (402) is arranged on the top cover. 8. The blower according to claim 7, characterized in that, the blower (1000) further comprises an impeller assembly (30) drivingly connected to the stator and rotor assembly (20), the impeller assembly (30) comprising a On the bottom support plate (311) of the supporting blade (32), the stator and rotor assembly (20) includes an outer rotor shell (21) configured with openings (211), and the outer rotor shell (21) is connected to the A return air gap (70) communicated with the assembly cavity (4012) is configured between the bottom support plates (311); the air flowing through the stator and rotor assembly (20) is discharged through the opening (211) to the The return air gap (70) is derived from the blower (1000). 9 . The blower according to claim 8 , wherein the stator and rotor assembly ( 20 ) comprises an output shaft ( 26 ) and a stator ( 22 ) accommodated inside the outer rotor shell ( 21 ), and the The output shaft (26) is connected to the outer rotor shell (21) through the stator (22); The stator (22) is mounted on the support plate (50), the windings (23) on the stator (22) are electrically connected to the circuit board (10) through wires (29), and the outer rotor shell ( 21) Drive connected with the impeller assembly (30) through the output shaft (26). 10 . The blower according to claim 8 , wherein the bottom support plate ( 311 ) is provided in a concave curved surface along a direction away from the stator and rotor assembly ( 20 ), and the outer rotor shell ( 21 ) is formed in a manner similar to that of the stator and rotor assembly ( 20 ). The bottom support plate (311) is provided with a corresponding convex curved surface; the air return gap (70) is located between the concave curved surface and the convex curved surface. 11. The blower according to claim 7, wherein the top cover (41) has a first extension section (417) extending radially outward, and the first extension section (417) is configured with the An extension cavity (4171) communicated with the assembly cavity (4012), and the air inlet (403) is provided at the extension end of the first extension section (417) and communicated with the extension cavity (4171). 12. The blower according to claim 11, characterized in that, the rear cover (42) extends radially outward with a second extension section (423) adapted to the first extension section (417), The side of the extension cavity (4171) facing the rear cover (42) is open, and the edge of the opening is pressed on the second extension section (423); One of the first extension section (417) and the second extension section (423) is provided with a clamping protrusion (416), and the other is provided with a clamping arm (422) having a clamping hole (4221), so The clamping arm (422) is clamped to the clamping protrusion (416) through the clamping hole (4221). 13 . The blower according to claim 12 , characterized in that, the protruding thickness of the snap protrusion ( 416 ) gradually decreases along the insertion direction of the top cover ( 41 ). 14 . 14. The blower according to claim 12, characterized in that, the second extending section (423) is configured with a flow guiding protrusion near the cavity (401). 15 . The blower according to claim 8 , wherein a water retaining rib ( 411 ) is protruded on the top cover ( 41 ), and the water retaining rib ( 411 ) is surrounded by the cavity ( 15 . 401), the protruding height of the water retaining ribs (411) is between 6mm-7mm. 16 . The blower according to claim 15 , wherein a plurality of arc baffles ( 3111 ) arranged at intervals around the axis of the bottom support plate ( 311 ) are protruded from the lower bottom surface of the bottom support plate ( 311 ). 17 . ), at least part of the extension end of the arc baffle plate (3111) extends along its own protruding direction to protrude into the inner side of the water retaining rib (411). 17. The blower according to claim 15, characterized in that, a drainage channel (413) and a drainage channel (413) are arranged on the outer side of the water retaining rib (411) on the top cover (41). 413) connected drainage holes (415), and the drainage channel (413) and the bottom of the water retaining rib (411) pass through a plane or inclined plane transition. 18. The blower according to claim 7, wherein a shock-absorbing seat (44) is pressed between the top cover (41) and the rear cover (42), and the shock-absorbing seat (44) One of the supporting plate (50) is provided with a connecting arm (51), the other is provided with an installation groove (441), and the connecting arm (51) is inserted into the installation groove (441). 19. The blower according to claim 18, characterized in that the middle part of the shock-absorbing seat (44) is annularly recessed to form the mounting groove (441), and the connecting arm (51) comprises two smooth transitions The arc-shaped claws (511) are arranged at intervals, and the two arc-shaped claws (511) are inserted into the installation groove (441) and clamped on both radial sides of the shock-absorbing seat (44). 20. An automobile air-conditioning assembly, characterized in that the automobile air-conditioning assembly comprises: The air-conditioning flow channel and the blower according to any one of claims 1 to 19, the air flow can flow along the air-conditioning flow channel under the power of the blower (1000); The air-conditioning flow channel is provided with a branch circuit (2000) in fluid communication therewith, and the branch circuit (2000) is in fluid communication with the airflow channel (402).

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