A controller circuit board built-in motor

Abstract

The application relates to the technical field of motors, and a motor with a built-in controller circuit board comprises a motor body, a fan cover and a circuit board. The fan cover is connected to one end of the motor body, the end of the fan cover close to the motor body is provided with a containing cavity, and the circuit board is embedded in the containing cavity. The circuit board of the controller is embedded in the containing cavity of the fan cover, the integration of the motor is improved, the possibility that the circuit board is damaged due to the impact of external objects is reduced, the space required by the motor during use is reduced, and the space utilization and service life of the motor are improved.

Description

Technical Field

[0001] This application relates to the technical field of electric motors, and in particular to an electric motor with a controller circuit board integrated within it. Background Technology

[0002] A variable frequency drive (VFD) is a power control device that uses power electronics technology to change the frequency of the power supply to a motor, thereby controlling the motor's speed. Currently, VFDs are separate from the motor housing, with the controller housing typically fixed to the motor housing via a threaded connection. However, this design lacks overall integration, resulting in a larger overall space occupied by the motor. Utility Model Content

[0003] To improve the integration and space utilization of the motor, this application provides a motor with a controller circuit board built in.

[0004] The motor built into the controller circuit board provided in this application adopts the following technical solution: A motor with a built-in controller circuit board includes a motor body, a fan cover, and a circuit board. The fan cover is connected to one end of the motor body, and a receiving cavity is provided at the end of the fan cover near the motor body. The circuit board is embedded in the receiving cavity.

[0005] By adopting the above technical solution, the controller's circuit board is embedded in the housing cavity of the fan cover, which improves the integration of the motor, reduces the possibility of damage to the circuit board caused by external objects hitting it, reduces the space required for the motor to be used, and improves the space utilization and service life of the motor.

[0006] Preferably, it also includes an output shaft and a fan. The output shaft is coaxially rotatably connected to the motor body. One end of the output shaft extends into the receiving cavity. The fan is connected to the outer periphery of the end of the output shaft that extends into the receiving cavity. The circuit board is connected to the bottom of the receiving cavity. The receiving cavity wall is provided with a plurality of air inlets. The air inlets are connected to the outside. The plurality of air inlets are circumferentially spaced around the fan shroud axis.

[0007] By adopting the above technical solution, the output shaft drives the fan to rotate, drawing outside air into the housing through the air inlet, thereby dissipating heat from the motor body and circuit board, reducing the possibility of motor damage due to excessive temperature, and improving the motor's service life and operational stability.

[0008] Preferably, a plurality of fixed seats are connected to the outer wall of the motor near the fan end. The plurality of fixed seats are distributed at intervals along the circumference of the motor body. The end of the motor body near the fixed seat is embedded in the receiving cavity. The outer wall of the fixed seat is in contact with the cavity wall. The fan cover is provided with a first connecting hole. The number of the first connecting holes is the same as the number of fixed seats and corresponds one-to-one. The first connecting hole is used for bolts to pass through and be threadedly connected to the fixed seat.

[0009] By adopting the above technical solution, a fixed base is set for connecting the air supply cover, so that there is a gap between the outer wall of the motor body and the cavity wall, which facilitates the fan to drive air through this gap to embed into the outer wall of the motor body, thereby improving the service life and reliability of the motor.

[0010] Preferably, the fan cover is provided with a cooling chamber, which is located on the side of the receiving cavity away from the motor body. The cooling chamber wall is provided with a first connecting channel, which is connected to the outside.

[0011] By adopting the above technical solution, a cooling chamber is set up, and the cooling fluid is introduced into the cooling chamber through the first connecting channel, which improves the absorption of heat generated by the motor during operation, so that the motor as a whole is at a suitable operating temperature and improves the heat dissipation efficiency of the motor.

[0012] Preferably, the device further includes a cooling assembly, which includes a turntable and sealing plugs. The turntable is connected to the end of the fan shroud away from the motor body. The turntable has two liquid storage chambers, which are symmetrically distributed along a line perpendicular to the turntable axis. A third connecting channel is provided on the wall of each liquid storage chamber, which is connected to the outside. The number of sealing plugs is the same as the number of third connecting channels and corresponds one-to-one. The sealing plugs are embedded in the third connecting channels to seal them. A second connecting channel is provided on the side wall of the liquid storage chamber near the fan shroud. The number of second connecting channels is the same as the number of first connecting channels and corresponds one-to-one. The end of the first connecting channel away from the cooling chamber is located at the end of the fan shroud away from the motor body. The two first connecting channels are respectively connected to the two second connecting channels.

[0013] By adopting the above technical solution and setting up a turntable, when coolant needs to be added to the cooling chamber, the sealing plug in the upper third connecting channel is removed, and coolant is introduced into the storage chamber through the third connecting channel. The coolant enters the cooling chamber through the second connecting channel and the first connecting channel. When coolant needs to be drained, the sealing plug in the lower third connecting channel is removed, and the coolant in the cooling chamber enters the storage chamber through the second connecting channel and the first connecting channel, and is then drained through the third connecting channel.

[0014] Preferably, the cooling assembly further includes a rotating shaft and a first reset member. The turntable is coaxially provided with a communicating hole, the rotating shaft is slidably embedded in the communicating hole, the rotating shaft is circumferentially fixed to the turntable, and the fan shroud is provided with a positioning groove at one end near the turntable. The positioning groove is used for one end of the rotating shaft to be embedded to achieve circumferential fixation of the turntable and the fan shroud. The first reset member is connected between the rotating shaft and the turntable, and the first reset member makes the rotating shaft tend to be embedded in the positioning groove.

[0015] By adopting the above technical solution and setting a rotating shaft, when the temperature of the coolant in the cooling chamber is too high and the cooling performance is poor, the rotating shaft can be pulled to disengage from the positioning groove. Rotating the rotating shaft will drive the turntable to rotate, so that the upper and lower liquid storage chambers are exchanged. The coolant in the cooling chamber is stored in the lower liquid storage chamber for cooling, and the upper liquid storage chamber, after being fully cooled, is embedded into the cooling chamber through the second connecting channel and the first connecting channel, thereby improving the utilization rate of the coolant.

[0016] Preferably, a lifting ring is connected to the outer periphery of the end of the rotating shaft away from the positioning groove. The side wall of the lifting ring is provided with a plurality of clearance grooves, which are symmetrically distributed along the axis of the rotating shaft. A groove is provided on the wall of the connecting hole away from the wind cover, which is used for the lifting ring to be inserted.

[0017] By adopting the above technical solution, a lifting ring is provided at one end of the rotating shaft, which makes it easy for the operator to drive the rotating shaft to rotate by lifting the ring. The side wall of the lifting ring is provided with a relief groove, which makes it easy for the operator to insert their fingers into the relief groove to pull the lifting ring out of the groove, thus improving the convenience of operation.

[0018] Preferably, the cooling assembly further includes a thermal expansion block, which is embedded in a positioning groove and is used to push the end of the rotating shaft away from the fan cover out of the groove.

[0019] By adopting the above technical solution, when the temperature of the coolant in the cooling chamber rises, the thermal expansion block expands due to heat, pushing the rotating shaft to slide, causing the lifting ring to extend out of the groove, making it easier for staff to observe the state of the lifting ring and adjust the turntable in a timely manner.

[0020] Preferably, the cooling assembly further includes a sealing plate and a second reset member. A groove is provided on the wall of the connecting hole, and the groove is connected to the second connecting channel. The sealing plate is slidably embedded in the groove to realize the opening and closing of the second connecting channel. The sliding direction of the sealing plate is perpendicular to the axial direction of the second connecting channel. An abutment ring is connected to the outer periphery of the rotating shaft. The outer periphery of the abutment ring away from the fan cover is provided with a first chamfer. The first chamfer is used to abut against the end of the sealing plate away from the second connecting channel. The second reset member is connected between the sealing plate and the turntable. The second reset member makes the sealing plate tend to move closer to the rotating shaft.

[0021] By adopting the above technical solution, pulling the rotating shaft causes the first chamfer to abut against the sealing plate, pushing the sealing plate to slide and close the second connecting channel, reducing the possibility of liquid leakage from the connection between the rotating disk and the fan cover when the rotating disk is turned, and improving the reliability of the cooling component.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. Embedding the controller's circuit board inside the fan housing increases the motor's integration, reduces the likelihood of damage to the circuit board caused by external objects impacting it, reduces the space required for the motor's use, and improves the motor's space utilization and lifespan. 2. To add coolant to the cooling chamber, remove the sealing plug in the upper third connecting channel and let the coolant flow into the reservoir through the third connecting channel. The coolant will then enter the cooling chamber through the second and first connecting channels. To drain the coolant, remove the sealing plug in the lower third connecting channel. The coolant in the cooling chamber will then enter the reservoir through the second and first connecting channels and then drain through the third connecting channel. 3. A rotating shaft is installed. When the temperature of the coolant in the cooling chamber is too high, the cooling performance is poor. The rotating shaft can be pulled to disengage from the positioning groove. Rotating the rotating shaft will drive the turntable to rotate, causing the upper and lower liquid storage chambers to exchange. The coolant in the cooling chamber is stored in the lower liquid storage chamber for cooling, and the upper liquid storage chamber, after being fully cooled, is embedded into the cooling chamber through the second connecting channel and the first connecting channel, thereby improving the utilization rate of the coolant. Attached Figure Description

[0023] Figure 1 This is an exploded view of the motor built into the controller circuit board.

[0024] Figure 2 This is a partial cross-sectional view of the motor built into the controller circuit board.

[0025] Figure 3 This is a schematic diagram of the rotating shaft.

[0026] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0027] Explanation of reference numerals in the attached figures: 1. Motor body; 11. Mounting base; 12. Heat dissipation fins; 2. Fan cover; 21. Receiving cavity; 22. Air inlet; 23. First connecting hole; 24. Cooling cavity; 25. First connecting channel; 251. Vertical channel; 252. Horizontal channel; 26. Positioning groove; 27. Groove; 28. First annular groove; 29. ​​Boss; 3. Circuit board; 4. Output shaft; 5. Fan; 6. Cooling assembly; 61. Turntable; 611. Liquid storage chamber; 612. Third connecting channel; 613. Second connecting channel; 614. Connecting hole; 615. Groove; 616. Slide groove; 617. Second annular groove; 618. Guide groove; 619. Rotating groove; 6110. Sealing groove; 6111. Third annular groove; 62. Sealing plug; 621. Lifting ring; 63. Rotating shaft; 631. Lifting ring; 6311. Clearance groove; 632. Abutment ring; 6321. First chamfer; 633. Positioning section; 634. Support section; 635. Limiting ring; 64. First reset component; 65. Thermal expansion block; 66. Sealing plate; 661. Guide block; 67. Second reset component; 68. Sealing ring. Detailed Implementation

[0028] The present application will be further described in detail below with reference to the accompanying drawings.

[0029] Reference Figure 1 This application discloses a motor built into a controller circuit board, comprising a motor body 1, a fan shroud 2, an output shaft 4, a fan 5, and a circuit board 3. A plurality of fixing seats 11 are fixedly connected to the outer wall of one end of the motor body 1, and the fixing seats 11 are spaced apart circumferentially along the motor body 1. In this embodiment, four fixing seats 11 are provided, evenly distributed circumferentially along the motor body 1. One end of the fan shroud 2 is provided with a receiving cavity 21, and the end of the motor body 1 near the fixing seat 11 is embedded in the receiving cavity 21, with the outer wall of the fixing seat 11 fitting against the cavity wall of the receiving cavity 21. The bottom of the receiving cavity 21 is provided with a groove 27, and the circuit board 3 is embedded in the groove 27. The fan shroud 2 is provided with first connecting holes 23, the number of which is the same as the number of fixing seats 11 and corresponds one-to-one. The first connecting holes 23 are used for bolts to pass through and be threadedly connected to the fixing seats 11. A plurality of heat dissipation fins 12 are fixedly connected to the outer wall of the motor body 1. The heat dissipation fins 12 are divided into four groups, with one group of heat dissipation fins 12 located between two adjacent fixed seats 11. The plurality of heat dissipation fins 12 in the same group are evenly distributed around the circumference of the motor body 1. The output shaft 4 is coaxially rotatably connected to the motor body 1, with both ends of the output shaft 4 extending out of the motor body 1. The fan 5 is coaxially fixedly connected to the outer circumference of one end of the output shaft 4 that extends into the receiving cavity 21. The receiving cavity 21 has a plurality of air inlets 22, which are spaced apart around the circumference of the fan shroud 2. In this embodiment, there are thirty-six air inlets 22, which are evenly distributed around the circumference of the fan shroud 2.

[0030] Reference Figure 1 and Figure 2A motor built into a controller circuit board also includes a cooling assembly 6. The cooling assembly 6 includes a turntable 61 and a sealing ring 68. The turntable 61 is coaxially rotatably connected to the end of the fan shroud 2 away from the motor body 1. The end of the turntable 61 near the fan shroud 2 is coaxially provided with a rotating groove 619. The end of the fan shroud 2 away from the motor body 1 is fixedly connected with a boss 29, which is embedded in the rotating groove 619. The sidewall of the boss 29 is in contact with the bottom of the rotating groove 619. A sealing groove 6110 is provided on the wall of the rotating groove 619, and the sealing ring 68 is embedded in the sealing groove 6110. The inner wall of the sealing ring 68 abuts against the sidewall of the boss 29.

[0031] Reference Figure 2 and Figure 3 The cooling assembly 6 also includes a rotating shaft 63. A connecting hole 614 is coaxially provided at the bottom of the rotating groove 619, penetrating the turntable 61 along its rotation axis. The rotating shaft 63 includes a positioning section 633, which is slidably embedded in the connecting hole 614 and circumferentially fixed to the turntable 61. In this embodiment, the cross-section of the positioning section 633 along the rotation axis of the turntable 61 is square. A lifting ring 631 is fixedly connected to the outer periphery of the positioning section 633 away from the fan shroud 2. A groove 615 is provided on the wall of the connecting hole 614 away from the fan shroud 2, for the lifting ring 631 to be inserted into. The groove wall of the groove 615 fits against the outer wall of the lifting ring 631. Several clearance grooves 6311 are provided on the side wall of the lifting ring 631, spaced circumferentially around its axis. In this embodiment, two clearance slots 6311 are provided, and the two clearance slots 6311 are symmetrically distributed along the axis of rotation perpendicular to the turntable 61.

[0032] The fan shroud 2 has a positioning groove 26 at one end near the turntable 61. The positioning groove 26 is used for the positioning section 633 to be inserted into the end near the fan shroud 2, and the groove wall of the positioning groove 26 fits against the side wall of the positioning section 633. The rotating shaft 63 also includes a support section 634. One end of the support section 634 is coaxially fixedly connected to the end of the positioning section 633 near the receiving cavity 21. The cross-section of the support section 634 along its axis is circular, and the side wall of the support section 634 is tangent to the groove wall of the positioning groove 26. The cooling assembly 6 also includes a thermal expansion block 65, which is fixedly connected to the bottom of the positioning groove 26. The other end of the thermal expansion block 65 abuts against the end of the support section 634 away from the positioning section 633. The groove wall of the positioning groove 26 has a first annular groove 28. A limit ring 635 is fixedly connected to the outer wall of the end of the support section 634 away from the positioning section 633, and the limit ring 635 is slidably embedded in the first annular groove 28. In this embodiment, when the limiting ring 635 abuts against the groove wall of the first annular groove 28 near the receiving cavity 21, the lifting ring 631 is embedded in the groove 615. When the limiting ring 635 abuts against the groove wall of the first annular groove 28 away from the receiving cavity 21, the positioning segment 633 disengages from the positioning groove 26.

[0033] The fan cover 2 is provided with a cooling cavity 24, which is located on the side of the groove 27 away from the receiving cavity 21. The outer wall of the cooling cavity 24 is provided with a first connecting channel 25. There are two first connecting channels 25, which are symmetrically distributed in the vertical direction. The first connecting channel 25 includes a vertical section channel 251 and a horizontal section channel 252. The axis of the vertical section channel 251 is perpendicular to the axis of the cooling cavity 24 and is coplanar with the axis of the cooling cavity 24. One end of the horizontal section channel 252 is connected to the end of the vertical section away from the cooling cavity 24, and the axis of the horizontal section is parallel to the axis of the cooling cavity 24. The end of the horizontal section channel 252 away from the axis of the vertical section is located at the end of the fan cover 2 away from the motor body 1. The turntable 61 is provided with liquid storage chambers 611, the number of which is the same as the number of the first connecting channels 25 and corresponds one-to-one. A third connecting channel 612 is provided on the side wall of the liquid storage chamber 611 away from the rotation axis of the turntable 61. The third connecting channel 612 communicates with the outside. The axis of the third connecting channel 612 is perpendicular to the rotation axis of the turntable 61. The inner wall of the third connecting channel 612 is tangent to the side wall of the liquid storage chamber 611 away from the wind hood 2. The side wall of the liquid storage chamber 611 away from the connecting hole 614 is inclined in the direction away from the connecting hole 614. In this embodiment, the third connecting channel 612 gradually narrows towards the end closer to the liquid storage chamber 611 along its axis. The cooling assembly 6 also includes sealing plugs 62. The number of sealing plugs 62 is the same as the number of third connecting channels 612 and they correspond one-to-one. The sealing plugs 62 are embedded in the third connecting channels 612 to seal the third connecting channels 612. The outer wall of the sealing plug 62 abuts against the inner wall of the third connecting channel 612. A lifting ring 621 is fixedly connected to the end of the sealing plug 62 away from the liquid storage chamber 611. A second connecting channel 613 is provided on the side wall of the liquid storage chamber 611 near the fan shroud 2. The second connecting channel 613 is used to communicate with the transverse channel 252. The inner wall of the second connecting channel 613 is tangent to the side wall of the liquid storage chamber 611 near the rotation axis of the turntable 61. The side wall of the liquid storage chamber 611 near the connecting hole 614 is inclined towards the direction of the connecting hole 614.

[0034] Reference Figure 3 and Figure 4The cooling assembly 6 also includes a first reset member 64, a sealing plate 66, and a second reset member 67. A second annular groove 617 is provided on the wall of the connecting hole 614. An abutment ring 632 is fixedly connected to the outer periphery of the positioning section 633, and the abutment ring 632 is slidably embedded in the second annular groove 617. The first reset member 64 is connected between the abutment ring 632 and the turntable 61, and the first reset member 64 causes the positioning section 633 to tend to embed into the positioning groove 26. In this embodiment, the first reset member 64 is a spring, sleeved on the outer periphery of the positioning section 633. One end of the first reset member 64 is connected to the end of the abutment ring 632 away from the fan shroud 2. A third annular groove 6111 is provided on the side wall of the second annular groove 617 away from the fan shroud 2, and the other end of the first reset member 64 is connected to the bottom of the third annular groove 6111. Two sliding grooves 616 are provided on the wall of the second annular groove 617. The two sliding grooves 616 are respectively connected to the two second connecting channels 613. The number of sealing plates 66 and the number of second reset pieces 67 are the same as the number of sliding grooves 616 and correspond one-to-one. The sealing plates 66 are slidably embedded in the sliding grooves 616 to realize the opening and closing of the second connecting channels 613. The sliding direction of the sealing plates 66 is perpendicular to the axis of the second connecting channels 613. The side wall of the sealing plates 66 is in contact with the wall of the sliding grooves 616. The outer periphery of the abutment ring 632 away from the wind cover 2 is provided with a first chamfer 6321. The first chamfer 6321 is used to abut against the end of the sealing plate 66 away from the second connecting channel 613. A guide groove 618 is provided on the side wall of the slide 616 near the fan shroud 2. A guide block 661 is fixedly connected to the side surface of the sealing plate 66 near the fan shroud 2. The guide block 661 is slidably embedded in the guide groove 618. A second reset member 67 is connected between the guide block 661 and the turntable 61. The second reset member 67 causes the sealing plate 66 to tend to approach the connecting hole 614. In this embodiment, the second reset member 67 is a spring. One end of the second reset member 67 is connected to the end of the guide block 661 away from the second connecting channel 613, and the other end of the second reset member 67 is connected to the side wall of the guide groove 618 away from the second connecting channel 613.

[0035] The implementation principle of the motor built into the controller circuit board in this application embodiment is as follows: the output shaft 4 rotates, driving the fan 5 to rotate, so that the outside air enters the receiving cavity 21 through the air inlet 22, and then blows out of the receiving cavity 21 through the gap between the motor body 1 and the cavity wall of the receiving cavity 21.

[0036] The liquid in the cooling chamber 24 enters the liquid storage chamber 611 located below the turntable 61 through the first connecting channel 25 and the second connecting channel 613. The liquid in the liquid storage chamber 611 above the turntable 61 enters the cooling chamber 24 through the second connecting channel 613 and the first connecting channel 25.

[0037] The liquid temperature inside the cooling chamber 24 rises, causing the thermal expansion block 65 to expand and push the rotating shaft 63 to slide. This pushes the lifting ring 631 out of the groove 615, and the first chamfer 6321 abuts against the sealing plate 66, pushing the sealing plate 66 to slide closer to the second connecting channel 613. Fingers are inserted into the two clearance grooves 6311, gripping the groove walls, and the positioning section 633 is pulled away from the positioning groove 26. The sealing plate 66 closes the second connecting channel 613. Rotating the lifting ring 631 causes the turntable 61 to rotate, moving the lower liquid storage chamber 611 above the turntable 61. Releasing the lifting ring 631 causes the first reset member 64 to push the abutment ring 632 to slide, and the positioning section 633 embeds into the positioning groove 26. Under the elastic force of the second reset member 67, the sealing plate 66 slides closer to the connecting hole 614, connecting the cooling chamber 24 with the liquid storage chamber 611.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A controller circuit board built-in motor, characterized by: It includes a motor body (1), a fan cover (2), and a circuit board (3); the fan cover (2) is connected to one end of the motor body (1); the fan cover (2) has a receiving cavity (21) at one end near the motor body (1); the circuit board (3) is embedded in the receiving cavity (21); It also includes an output shaft (4) and a fan (5); the output shaft (4) is coaxially rotatably connected to the motor body (1); one end of the output shaft (4) extends into the receiving cavity (21); the fan (5) is connected to the outer periphery of the end of the output shaft (4) that extends into the receiving cavity (21); the circuit board (3) is connected to the bottom of the receiving cavity (21); a number of air inlets (22) are provided on the cavity wall of the receiving cavity (21); the air inlets (22) are connected to the outside; the number of air inlets (22) are circumferentially distributed around the axis of the fan cover (2).

2. The motor with the controller circuit board built-in according to claim 1, characterized in that: A plurality of fixed seats (11) are connected to the outer wall of the motor near the fan (5); the plurality of fixed seats (11) are distributed circumferentially along the motor body (1); the end of the motor body (1) near the fixed seat (11) is embedded in the receiving cavity (21); the outer wall of the fixed seat (11) is in contact with the cavity wall of the receiving cavity (21); the fan cover (2) is provided with a first connecting hole (23); the number of the first connecting holes (23) is the same as the number of fixed seats (11) and corresponds one to one; the first connecting hole (23) is used for bolts to pass through and be threaded to the fixed seat (11).

3. The motor built into the controller circuit board according to claim 1, characterized in that: The fan cover (2) is provided with a cooling chamber (24); the cooling chamber (24) is located on the side of the receiving cavity (21) away from the motor body (1); a first connecting channel (25) is provided on the cavity wall of the cooling chamber (24); the first connecting channel (25) is connected to the outside.

4. The motor built into the controller circuit board according to claim 3, characterized in that: It also includes a cooling assembly (6); the cooling assembly (6) includes a turntable (61) and sealing plugs (62); the turntable (61) is connected to the end of the fan shroud (2) away from the motor body (1); the turntable (61) is provided with a liquid storage chamber (611); there are two liquid storage chambers (611); the two liquid storage chambers (611) are symmetrically distributed along the axis perpendicular to the turntable (61); a third connecting channel (612) is provided on the wall of the liquid storage chamber (611); the third connecting channel (612) is connected to the outside; the number of sealing plugs (62) is the same as the number of third connecting channels (612). The number of channels is the same and corresponds one-to-one; the sealing plug (62) is embedded in the third connecting channel (612) to achieve the closure of the third connecting channel (612); the liquid storage chamber (611) is provided with a second connecting channel (613) on the side wall near the fan cover (2); the number of the second connecting channels (613) is the same as the number of the first connecting channels (25) and corresponds one-to-one; the end of the first connecting channel (25) away from the cooling chamber (24) is located at the end of the fan cover (2) away from the motor body (1); the two first connecting channels (25) are respectively connected to the two second connecting channels (613).

5. The motor built into the controller circuit board according to claim 4, characterized in that: The cooling assembly (6) further includes a rotating shaft (63) and a first reset member (64); the turntable (61) is coaxially provided with a connecting hole (614); the rotating shaft (63) is slidably embedded in the connecting hole (614); the rotating shaft (63) and the turntable (61) are circumferentially fixed; the fan shroud (2) is provided with a positioning groove (26) at one end near the turntable (61); the positioning groove (26) is used for one end of the rotating shaft (63) to be embedded to achieve circumferential fixation of the turntable (61) and the fan shroud (2); the first reset member (64) is connected between the rotating shaft (63) and the turntable (61); the first reset member (64) makes the rotating shaft (63) tend to be embedded in the positioning groove (26).

6. The motor built into the controller circuit board according to claim 5, characterized in that: A lifting ring (631) is connected to the outer periphery of the end of the rotating shaft (63) away from the positioning groove (26); the side wall of the lifting ring (631) is provided with a plurality of clearance grooves (6311); the plurality of clearance grooves (6311) are symmetrically distributed along the axis of the rotating shaft (63); the wall of the connecting hole (614) away from the wind cover (2) is provided with a groove (615); the groove (615) is used for the lifting ring (631) to be inserted.

7. The motor built into the controller circuit board according to claim 6, characterized in that: The cooling assembly (6) also includes a thermal expansion block (65); the thermal expansion block (65) is embedded in the positioning groove (26); the thermal expansion block (65) is used to push the end of the rotating shaft (63) away from the fan cover (2) out of the groove (615).

8. The motor built into the controller circuit board according to claim 6, characterized in that: The cooling assembly (6) further includes a sealing plate (66) and a second reset member (67); a groove (616) is provided on the wall of the connecting hole (614); the groove (616) is connected to the second connecting channel (613); the sealing plate (66) is slidably embedded in the groove (616) to realize the opening and closing of the second connecting channel (613); the sliding direction of the sealing plate (66) is perpendicular to the axial direction of the second connecting channel (613); an abutment ring (632) is connected to the outer periphery of the rotating shaft (63); a first chamfer (6321) is provided on the outer periphery of the abutment ring (632) away from the fan cover (2); the first chamfer (6321) is used to abut against the end of the sealing plate (66) away from the second connecting channel (613); the second reset member (67) is connected between the sealing plate (66) and the turntable (61); the second reset member (67) makes the sealing plate (66) tend to move closer to the rotating shaft (63).

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