Centrifugal spray head motor

Abstract

The utility model discloses a centrifugal spray head motor is provided with upper heat dissipation chamber between upper shell and middle shell, is provided with lower heat dissipation chamber between middle shell and lower shell, and the inside wall and the outside wall of middle shell are provided with a plurality of side heat dissipation holes along the circumferential direction interval, and the upper end of each side heat dissipation hole is communicated with upper heat dissipation chamber, and the lower end of each side heat dissipation hole is communicated with lower heat dissipation chamber, and upper heat dissipation chamber, each side heat dissipation hole and lower heat dissipation chamber form three -dimensional heat dissipation flow channel. The liquid of upper heat dissipation chamber flows into the periphery of lower heat dissipation chamber through each side heat dissipation hole respectively, and the liquid of lower heat dissipation chamber flows from outside to inside, and then flows to centrifugal atomization component through liquid outlet, to form three -dimensional heat dissipation flow channel of the wrapping motor assembly around the periphery of motor assembly, increase the heat dissipation coverage, improve the heat dissipation performance, and the plurality of side heat dissipation holes simultaneously draw liquid downwards, improve liquid supply flow, guarantee motor assembly long -time operation under high power, improve the spray effect.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal nozzle technology, and in particular to a centrifugal nozzle motor. Background Technology

[0002] A centrifugal nozzle is a device that uses centrifugal force to atomize or uniformly distribute liquids. It is widely used in agriculture, industrial spraying, fire fighting, and environmental protection. The centrifugal nozzle motor drives a centrifugal disc to rotate, generating centrifugal force. Liquid is then sprayed onto the disc through a pipe, thus atomizing the liquid. The higher the motor speed, the smaller the atomized droplet size, resulting in more complete atomization and better spray uniformity. Therefore, the motor speed directly affects the atomization effect. However, as the motor speed increases, the motor power also needs to increase. This leads to excessive heat generation, triggering overheat protection, which limits power and reduces the speed, resulting in a decrease in atomization effect. Therefore, the heat dissipation performance of the centrifugal nozzle motor is particularly important.

[0003] In existing technologies, centrifugal nozzle motors primarily rely on their outer casing for passive heat dissipation, resulting in poor cooling performance. However, Chinese utility model patent application CN202310851968.4 describes a centrifugal nozzle that utilizes a planar heat dissipation channel between the ESC and the motor. The liquid to be sprayed first flows through this channel, then through a flow-stopping module, and finally through an outlet structure to the centrifugal disc. The fluid in this patented design is then transferred to the flow-stopping module via a pneumatic connector, a flow-channel inlet, and a flow-channel outlet. While the annular flow-channel design increases heat dissipation, its planar structure only cools the end faces of the ESC and motor. The motor's heat-generating surface extends beyond the end faces to the entire casing. Furthermore, the annular flow-channel cannot cover the center of the motor and ESC, resulting in limited coverage and thus limited cooling for the motor. Consequently, prolonged high-power operation can still lead to motor overheating. There is also a Chinese utility model patent: CN201920742209.3, a centrifugal nozzle for an agricultural drone. This patent uses a fixed annular tube surrounding the outer ring of a motor. One end of the annular tube is connected to a liquid inlet pipe, and the other end is connected to the upper inner side of the spray shell through a conduit to dissipate heat from the side of the motor. Although this patent increases the contact area with the motor through the annular tube, the structure is complex and costly. Because the annular tube needs to surround the motor, its diameter is small due to the motor's size, resulting in reduced liquid supply flow and poor atomization. Furthermore, it cannot dissipate heat from the upper and lower end faces of the motor, nor can it dissipate heat from the electronic speed controller (ESC), limiting the heat dissipation range. Therefore, improvements are necessary. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a centrifugal nozzle motor that provides all-round heat dissipation for the motor, improves heat dissipation performance, and enhances the spraying effect of the centrifugal nozzle.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a centrifugal nozzle motor, comprising an upper shell, a middle shell, and a lower shell arranged sequentially from top to bottom. An electric speed controller is installed inside the upper shell, and a motor assembly and a drive shaft are installed inside the middle shell. The motor assembly is connected to the drive shaft. The lower end of the drive shaft passes through the lower shell and is connected to a centrifugal atomizing assembly. An upper heat dissipation chamber is provided between the upper shell and the middle shell, and a lower heat dissipation chamber is provided between the middle shell and the lower shell. Multiple side heat dissipation holes are arranged at intervals along the circumferential direction between the inner and outer side walls of the middle shell. The upper end of each side heat dissipation hole communicates with the upper heat dissipation chamber, and the lower end of each side heat dissipation hole communicates with the lower heat dissipation chamber. The upper heat dissipation chamber, the side heat dissipation holes, and the lower heat dissipation chamber are connected to form a three-dimensional heat dissipation channel. A liquid inlet connector is provided on one side of the upper heat dissipation chamber, and multiple liquid outlets are provided in the middle of the lower heat dissipation chamber. Each liquid outlet is arranged at intervals along the circumferential direction and located around the drive shaft.

[0006] In a further technical solution, a flow equalization hole is provided between each side heat dissipation hole and the upper heat dissipation chamber, and the inner diameter of each flow equalization hole gradually increases from the side adjacent to the liquid inlet connector to the side away from the liquid inlet connector.

[0007] In a further technical solution, multiple annular heat dissipation fins are provided on the outer side of the middle shell, the inner ring of each annular heat dissipation fin is formed on the outer side of the middle shell, and the annular heat dissipation fins are spaced apart along the numerical direction.

[0008] In a further technical solution, the inner shell is provided with an upward-opening heat dissipation groove, an installation cavity, and a sealing partition for separating the heat dissipation groove and the installation cavity. The motor assembly is located in the installation cavity. The heat dissipation groove and the upper shell enclose each other to form an upper heat dissipation chamber. The outer edge of the sealing partition is circumferentially formed on the inner wall of the inner shell. A sealing boss is provided at the center of the upper end face of the sealing partition. The upper end face of the sealing boss abuts against the lower end face of the upper shell. A first sealing ring is provided between the sealing boss and the upper shell. A lower mounting post is provided at the center of the lower end face of the sealing partition. The lower mounting post has a rotating shaft hole that vertically penetrates the lower mounting post, the sealing partition, and the upper sealing platform. The drive shaft is rotated and installed in the rotating shaft hole. The sealing boss also has a lower wire hole. The lower end face of the upper shell has an upper wire hole that communicates with the inner cavity of the upper shell. The upper wire hole and the lower wire hole are aligned. A wire is connected between the ESC and the motor assembly. The wire passes through the upper wire hole and the lower wire hole.

[0009] In a further technical solution, a lower sealing cover is fixedly installed on the lower part of the middle shell, a second sealing ring is provided between the lower sealing cover and the middle shell, the drive shaft passes through the lower sealing cover and is connected to the centrifugal atomizing component, and an oil seal is provided between the drive shaft and the lower sealing cover.

[0010] In a further technical solution, the upper shell includes a connecting pipe, a conical shell, and an upper sealing cover. The lower end of the connecting pipe is integrally formed with the upper end of the conical shell. The upper sealing cover is fixedly installed on the lower end face of the conical shell. The upper sealing cover and the heat dissipation groove enclose the upper heat dissipation chamber. The upper end face of the middle shell is provided with a sealing groove along the contour direction. A third sealing ring is embedded in the sealing groove. The upper part of the third sealing ring protrudes from the sealing groove and abuts against the upper sealing cover. The lower end face of the upper sealing cover is provided with a downwardly protruding sealing ring, which is fitted onto the sealing boss. The first sealing ring is located between the sealing boss and the sealing ring. A lower connecting part extends from one side of the upper part of the middle shell. An upper connecting part corresponding to the lower connecting part is provided on one side of the upper sealing cover. The upper connecting part is located above the lower connecting part and has a connecting hole. The liquid inlet connector is fixedly installed in the connecting hole.

[0011] In a further technical solution, the upper end face of the upper sealing cover is provided with multiple fixing posts, each fixing post having an upward-facing threaded hole. The ESC is fixedly installed on each upper mounting post by screws. A thermally conductive gap is provided between the ESC and the upper sealing cover, and the thermally conductive gap is filled with thermally conductive silicone.

[0012] In a further technical solution, the lower shell includes an annular shell and a circular shell. The lower part of the annular shell is formed around the outer edge of the circular shell. The annular shell is fitted onto the lower part of the middle shell. A fourth sealing ring is provided between the outer side of the middle shell and the inner side of the annular shell. The lower end faces of the annular shell, the circular shell, and the lower shell enclose a lower heat dissipation chamber. An outer water baffle ring is provided in the middle of the upper end face of the circular shell. Each liquid outlet is provided on the outer periphery of the outer water baffle ring. An inner water baffle ring protrudes downward on the lower end face of the middle shell. The inner water baffle ring is inserted into the inner ring of the outer water baffle ring. The upper part of the outer water baffle ring abuts against the middle shell. The lower edge of each liquid outlet extends downward to form a drainage portion.

[0013] In a further technical solution, the motor assembly includes a rotor, a stator, a magnetic yoke, a coil, and multiple magnets. The rotor is fixedly mounted on the lower part of the drive shaft, the stator is fixedly mounted on the lower mounting post, the coil is wound on the stator, the magnetic yoke is fixedly mounted on the outer edge of the rotor, and the upper part of the rotor is provided with multiple upwardly protruding spacer teeth at equal intervals along the circumferential direction. Each spacer tooth is located on the inner side of the magnetic yoke, and each magnet is located between two adjacent spacer teeth. The middle part of the rotor is provided with multiple motor heat dissipation holes that penetrate the rotor at intervals along the circumferential direction. At least two bearings are provided between the shaft hole and the drive shaft. The two bearings are located at the upper and lower ends of the shaft hole, respectively. A retaining ring is provided at the upper end of the drive shaft, and a retaining ring is provided between the retaining ring and the bearing.

[0014] In a further technical solution, the centrifugal atomizing component includes an upper centrifugal hood and a lower centrifugal disc, with the lower centrifugal disc located inside the upper centrifugal hood. The upper centrifugal hood and the lower centrifugal disc are connected by multiple centrifugal columns. Multiple downward-protruding turbulence columns are provided around the outer edge of the upper centrifugal hood, with each turbulence column spaced apart along the circumferential direction. A connecting protrusion is provided in the middle of the lower centrifuge shroud. The lower end of the drive shaft passes through the upper centrifuge shroud and is fixedly connected to the connecting protrusion. Multiple arc-shaped guide protrusions are spaced apart along the circumferential direction on the upper part of the lower centrifuge shroud. Each arc-shaped guide protrusion has a shearing protrusion at its outer end. Multiple cutting teeth are provided along the circumferential direction on the outer edge of the lower centrifuge shroud.

[0015] The advantages of this invention compared to existing technologies are as follows: Liquid is introduced into one side of the upper heat dissipation chamber via the inlet connector. The liquid flows from the side adjacent to the inlet connector towards the side away from the inlet connector, filling the upper heat dissipation chamber. The liquid in the upper heat dissipation chamber flows into the periphery of the lower heat dissipation chamber through various side heat dissipation holes. The liquid in the lower heat dissipation chamber flows from the outside inward towards various outlets, filling the lower heat dissipation chamber. The liquid in the lower heat dissipation chamber flows to the centrifugal atomizing component through various outlets, forming a three-dimensional heat dissipation channel surrounding the motor component. The upper heat dissipation chamber simultaneously dissipates heat to the upper part of the ESC and motor component, the side heat dissipation holes dissipate heat to the sides of the motor component, and the lower heat dissipation chamber dissipates heat to the lower part of the motor component, thereby increasing the heat dissipation coverage area and improving heat dissipation performance. The structure is simple and low-cost. Multiple side heat dissipation holes simultaneously guide liquid downwards, increasing the liquid supply flow rate and ensuring the motor component operates at high power for extended periods, thus improving the spraying effect. The annular heat dissipation fins increase the contact area between the middle shell and the air, cooling the liquid flowing through the side heat dissipation holes. This prevents the liquid from heating up after flowing through the upper heat dissipation chamber, thus reducing the heat dissipation performance and improving the uniformity of heat dissipation performance in various parts of the motor assembly, preventing local heat accumulation. The motor assembly adopts an external rotor motor, which concentrates the heat of the motor assembly on the periphery to improve heat dissipation efficiency. In addition, motor heat dissipation holes are opened on the rotor, so that the heat inside the motor assembly can overflow downward from the motor heat dissipation holes and be dissipated through the lower heat dissipation chamber, further improving heat dissipation performance. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4This is a schematic diagram of the liquid flow in the side heat dissipation holes and the lower heat dissipation chamber of this utility model; Figure 5 This is a schematic diagram of the liquid flow in the upper heat dissipation chamber of this utility model; Figure 6 This is an exploded view of the motor assembly of this utility model.

[0018] In the picture: 11 Upper heat dissipation chamber, 111 Flow equalization hole, 12 Side heat dissipation hole, 13 Lower heat dissipation chamber, 131 Liquid outlet, 132 Drainage section; 2. Liquid inlet connector; 3. Upper shell, 31. Connecting pipe, 32. Conical shell, 33. Upper sealing cover, 331. Upper wire hole, 332. Sealing collar, 333. Upper connecting part, 334. Connecting hole, 335. Fixing post, 336. Threaded hole, 337. Thermal conduction gap; 4. Middle shell, 41. Annular heat dissipation fins, 42. Heat dissipation groove, 43. Mounting cavity, 44. Sealing partition, 441. Sealing boss, 442. Lower wire hole, 443. Lower mounting post, 444. Rotary shaft hole, 445. Sealing groove, 45. Lower sealing cover, 451. Oil seal, 452. Inner water baffle ring, 46. Lower connecting part, 47. First sealing ring, 48. Second sealing ring, 49. Third sealing ring; 5. Lower shell, 51. Annular shell, 52. Circular shell, 521. Outer water baffle ring, 53. Fourth sealing ring; 6. ESCs; 7 Motor assembly, 71 Rotor, 711 Spacing teeth, 712 Motor heat dissipation holes, 72 Stator, 73 yoke, 74 Magnet; 8. Drive shaft, 81. Bearing, 82. Snap ring, 83. Retaining ring; 9 Centrifugal atomizing component, 91 Upper centrifugal hood, 911 Baffle column, 92 Lower centrifugal disc, 921 Centrifugal column, 922 Connecting protrusion, 923 Arc-shaped guide protrusion, 924 Shearing protrusion, 925 Cutting teeth. Detailed Implementation

[0019] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0020] A centrifugal nozzle motor, such as Figures 1 to 6As shown, from top to bottom, an upper shell 3, a middle shell 4, and a lower shell 5 are arranged sequentially. An electric speed controller 6 is housed inside the upper shell 3. A motor assembly 7 and a drive shaft 8 are housed inside the middle shell 4. The motor assembly 7 and the drive shaft 8 are connected in a transmission relationship. The lower end of the drive shaft 8 passes through the lower shell 5 and is connected to a centrifugal atomizing assembly 9. An upper heat dissipation chamber 11 is provided between the upper shell 3 and the middle shell 4, and a lower heat dissipation chamber 13 is provided between the middle shell 4 and the lower shell 5. The inner and outer walls of the middle shell 4 are spaced apart along the circumferential direction by... Multiple side heat dissipation holes 12 are provided. The upper end of each side heat dissipation hole 12 is connected to the upper heat dissipation chamber 11, and the lower end of each side heat dissipation hole 12 is connected to the lower heat dissipation chamber 13. The upper heat dissipation chamber 11, each side heat dissipation hole 12 and the lower heat dissipation chamber 13 are connected to form a three-dimensional heat dissipation channel. A liquid inlet connector 2 is provided on one side of the upper heat dissipation chamber 11, and multiple liquid outlets 131 are provided in the middle of the lower heat dissipation chamber 13. Each liquid outlet 131 is spaced apart along the circumferential direction and located on the periphery of the drive shaft 8. Traditional centrifugal nozzles mostly rely on passive heat dissipation, while some active heat dissipation nozzles only utilize planar flow channels for cooling, which cannot fully cover the motor assembly 7. This results in poor heat dissipation performance, making it impossible to operate at high power for extended periods and maintain optimal spraying effects. It also affects the supply flow rate of the sprayed liquid. In contrast, this invention uses an inlet connector 2 to introduce liquid into one side of the upper heat dissipation chamber 11. The liquid flows from the side adjacent to the inlet connector 2 towards the side away from the inlet connector, filling the upper heat dissipation chamber 11. The liquid in the upper heat dissipation chamber 11 flows into the periphery of the lower heat dissipation chamber 13 through the side heat dissipation holes 12. The liquid in the lower heat dissipation chamber 13 flows from the outside inwards towards the outlets 131. The liquid in the lower heat dissipation chamber 13 is filled with liquid, which flows through each liquid outlet 131 to the centrifugal atomizing component 9, forming a three-dimensional heat dissipation channel around the motor component 7. The upper heat dissipation chamber 11 simultaneously dissipates heat from the upper part of the ESC 6 and the motor component 7, the side heat dissipation holes 12 dissipate heat from the side of the motor component 7, and the lower heat dissipation chamber 13 dissipates heat from the lower part of the motor component 7. This increases the heat dissipation coverage area, improves heat dissipation performance, and has a simple structure and low cost. Multiple side heat dissipation holes 12 simultaneously guide liquid downwards, increasing the liquid supply flow rate and ensuring that the motor component 7 can operate continuously at high power for a long time, thus improving the spraying effect.

[0021] Specifically, flow equalization holes 111 are respectively provided between each side heat dissipation hole 12 and the upper heat dissipation chamber 11. The inner diameter of each flow equalization hole 111 gradually increases from the side adjacent to the liquid inlet connector 2 to the side away from the liquid inlet connector 2. Since the liquid inlet connector 2 is located on one side of the middle shell 4, the liquid enters from the side of the upper heat dissipation chamber 11. Therefore, the pressure on the side of the upper heat dissipation chamber 11 near the liquid inlet connector 2 is higher, while the pressure on the side away from the liquid inlet connector 2 is lower. This results in high pressure and flow rate of the side heat dissipation holes 12 closer to the liquid inlet connector 2, and low pressure and flow rate of the side heat dissipation holes 12 farther from the liquid inlet connector 2, resulting in poor uniformity of liquid flow in the three-dimensional heat dissipation channel. Therefore, by setting flow equalization holes 111 with different inner diameters, the pressure and flow rate of the side heat dissipation holes 12 near the liquid inlet connector 2 are reduced, and the pressure and flow rate of the side heat dissipation holes 12 away from the liquid inlet connector 2 are increased, thereby improving the uniformity of liquid flow in the three-dimensional heat dissipation channel.

[0022] Specifically, the outer surface of the middle shell 4 is provided with multiple annular heat dissipation fins 41. The inner ring of each annular heat dissipation fin 41 is formed on the outer surface of the middle shell 4, and the annular heat dissipation fins 41 are spaced apart along the numerical direction. The annular heat dissipation fins 41 increase the contact area between the middle shell 4 and the air, thereby cooling the liquid flowing through the side heat dissipation holes 12. This prevents the heat dissipation performance from decreasing due to the liquid heating up after flowing through the upper heat dissipation chamber 11, improves the uniformity of heat dissipation performance for various parts of the motor assembly 7, and avoids local heat accumulation.

[0023] Specifically, the inner shell 4 is provided with an upward-opening heat dissipation groove 42, a mounting cavity 43, and a sealing partition 44 for separating the heat dissipation groove 42 and the mounting cavity 43. The motor assembly 7 is disposed in the mounting cavity 43. The heat dissipation groove 42 and the upper shell 3 enclose each other to form an upper heat dissipation chamber 11. The outer edge of the sealing partition 44 is circumferentially formed on the inner wall of the inner shell 4. A sealing boss 441 is provided at the center of the upper end face of the sealing partition 44. The upper end face of the sealing boss 441 abuts against the lower end face of the upper shell 3. A first sealing ring 47 is provided between the sealing boss 441 and the upper shell 3. A lower mounting post 443 is provided at the center of the lower end face of 4. The lower mounting post 443 has a rotating shaft hole 444 that passes vertically through the lower mounting post 443, the sealing partition 44, and the upper sealing platform. The driving shaft 8 is rotated and installed in the rotating shaft hole 444. The sealing boss 441 also has a lower wire hole 442. The lower end face of the upper shell 3 has an upper wire hole 331 that communicates with the inner cavity of the upper shell 3. The upper wire hole 331 and the lower wire hole 442 are aligned. A wire is connected between the electric speed controller 6 and the motor assembly 7. The wire passes through the upper wire hole 331 and the lower wire hole 442. The mounting cavity 43 and the upper heat dissipation chamber 11 are separated by a sealing partition 44, which conducts heat from the mounting cavity 43 to the upper heat dissipation chamber 11, improving heat dissipation efficiency. A sealing boss 441 passes through the upper heat dissipation chamber 11 and abuts against the upper shell 3, so as to connect the inner cavity of the upper shell 3 and the mounting cavity 43 through the upper wire hole 331 and the lower wire hole 442, thereby facilitating the connection of the ESC 6 and the motor assembly 7 through the wires. The first sealing ring 47 is used to seal the upper heat dissipation chamber 11 to prevent liquid from flowing into the upper shell 3 or the mounting cavity 43 from the upper wire hole 331, the lower wire hole 442 or the shaft hole 444, so as to protect the motor assembly 7 and the ESC 6, prevent water ingress, and improve reliability and stability.

[0024] Specifically, a lower sealing cover 45 is fixedly installed on the lower part of the middle shell 4. A second sealing ring 48 is provided between the lower sealing cover 45 and the middle shell 4. The drive shaft 8 passes through the lower sealing cover 45 and is connected to the centrifugal atomizing assembly 9. An oil seal 451 is provided between the drive shaft 8 and the lower sealing cover 45. The lower opening of the mounting cavity 43 is sealed by the lower sealing cover 45, which facilitates the installation of the motor assembly 7 during production and subsequent maintenance. The second sealing ring 48 is used to seal between the middle shell 4 and the lower sealing cover 45, and the oil seal 451 is used to seal between the lower sealing cover 45 and the drive shaft 8, thereby sealing the mounting cavity 43 and improving its waterproof performance.

[0025] Specifically, the upper shell 3 includes a connecting pipe 31, a conical shell 32, and an upper sealing cover 33. The lower end of the connecting pipe 31 is integrally formed with the upper end of the conical shell 32. The upper sealing cover 33 is fixedly installed on the lower end face of the conical shell 32. The upper sealing cover 33 and the heat dissipation groove 42 enclose and form an upper heat dissipation chamber 11. The upper end face of the middle shell 4 is provided with a sealing groove 445 along the contour direction. A third sealing ring 49 is embedded in the sealing groove 445. The upper part of the third sealing ring 49 protrudes from the sealing groove 445 and abuts against the upper sealing cover 33. A downwardly protruding sealing ring 332 is provided on the lower end face of the upper sealing cover 33. The sealing ring 332 is fitted onto the sealing boss 441, and the first sealing ring 47 is provided between the sealing boss 441 and the sealing ring 332. A lower connecting part 46 extends from one side of the upper part of the middle shell 4. An upper connecting part 333 corresponding to the lower connecting part 46 is provided on one side of the upper sealing cover 33. The upper connecting part 333 is located above the lower connecting part 46. The upper connecting part 333 has a connecting hole 334, and the liquid inlet connector 2 is fixedly installed in the connecting hole 334. The connecting pipe 31 facilitates the connection of wires to the ESC 6 and the external control system, thereby providing power and control signal transmission to the motor assembly 7, preventing exposed wires, and forming an internal wiring structure. The upper sealing cover 33 simultaneously seals the conical shell 32 and the middle shell 4, simplifying the structure and facilitating the installation of the ESC 6. The third sealing ring 49 seals the upper sealing cover 33 between the upper sealing cover 33 and the middle shell 4, ensuring the airtightness of the upper heat dissipation chamber 11 and preventing water leakage.

[0026] Specifically, the upper end face of the upper sealing cover 33 is provided with multiple fixing posts 335, each fixing post 335 having an upward-facing threaded hole 336. The ESC 6 is fixedly installed on each upper mounting post by screws. A thermally conductive gap 337 is provided between the ESC 6 and the upper sealing cover 33, and the thermally conductive gap 337 is filled with thermally conductive silicone. Since there are multiple electronic components on the lower end face of the ESC 6, and the thickness of each electronic component is different, the contact area between the ESC 6 and the upper sealing cover 33 is small, resulting in low heat conduction efficiency. The ESC 6 is fixed by the fixing posts 335, forming a thermally conductive gap 337 between the ESC 6 and the upper sealing cover 33. The thermally conductive silicone is filled in the thermally conductive gap 337, which increases the contact area between the ESC 6 and the upper sealing cover 33, improves the heat conduction efficiency, and thus improves the heat dissipation effect of the ESC 6.

[0027] Specifically, the lower shell 5 includes an annular shell 51 and a circular shell 52. The lower part of the annular shell 51 is formed around the outer edge of the circular shell 52. The annular shell 51 is fitted onto the lower part of the middle shell 4. A fourth sealing ring 53 is provided between the outer side of the middle shell 4 and the inner side of the annular shell 51. The lower end faces of the annular shell 51, the circular shell 52 and the lower shell 5 enclose and form a lower heat dissipation chamber 13. An outer water baffle ring 521 is provided in the middle of the upper end face of the circular shell 52. Each liquid outlet 131 is respectively provided on the outer periphery of the outer water baffle ring 521. An inner water baffle ring 452 that protrudes downward is provided on the lower end face of the middle shell 4. The inner water baffle ring 452 is inserted into the inner ring of the outer water baffle ring 521. The upper part of the outer water baffle ring 521 abuts against the middle shell 4. The lower edge of each liquid outlet 131 extends downward to form a drainage portion 132. The lower shell 5 is sealed to the lower part of the middle shell 4 by the fourth sealing ring 53. The upper end face of the circular shell 52, the inner wall of the annular shell 51 and the lower end face of the lower sealing cover 45 enclose the lower heat dissipation chamber 13. The liquid in the lower heat dissipation chamber 13 is blocked by the outer water baffle ring 521 and forms a complex sealing structure with the inner water baffle ring 452 to prevent the liquid in the lower heat dissipation chamber 13 from entering the shaft hole 444 and ensure that the liquid flows out from the liquid outlet 131. The length of the liquid outlet 131 is increased by the drainage part 132 to guide and drain the liquid and prevent the liquid from overflowing along the lower end face of the circular shell 52, ensuring that the liquid is directly discharged to the centrifugal atomizing component 9 to improve the atomization uniformity.

[0028] Specifically, the motor assembly 7 includes a rotor 71, a stator 72, a magnetic yoke 73, a coil, and multiple magnets 74. The rotor 71 is fixedly mounted on the lower part of the drive shaft 8, the stator 72 is fixedly mounted on the lower mounting post 443, the coil is wound on the stator 72, the magnetic yoke 73 is fixedly mounted on the outer periphery of the rotor 71, the upper part of the rotor 71 is provided with multiple upwardly protruding spacer teeth 711 at equal intervals along the circumferential direction, each spacer tooth 711 is located on the inner side of the magnetic yoke 73, and each magnet 74 is respectively disposed between two adjacent spacer teeth 711. The middle part of the rotor 71 is provided with multiple motor heat dissipation holes 712 that penetrate the rotor 71 at intervals along the circumferential direction; at least two bearings 81 are provided between the shaft hole 444 and the drive shaft 8, the two bearings 81 are respectively located at the upper and lower ends of the shaft hole 444, a retaining ring 82 is provided at the upper end of the drive shaft 8, and a retaining ring 83 is provided between the retaining ring 82 and the bearing 81. The motor assembly 7 uses an external rotor motor, which concentrates the heat of the motor assembly 7 on the periphery to improve heat dissipation efficiency. Heat dissipation holes 712 are provided on the rotor 71, allowing the heat inside the motor assembly 7 to overflow downwards through the heat dissipation holes 712 and be dissipated through the lower heat dissipation chamber 13, further improving heat dissipation performance. A retaining ring 82 limits and fixes the drive shaft 8, and a retaining ring 83 reduces the friction between the retaining ring 82 and the bearing 81. The structure is simple and low-cost. Two bearings 81 are spaced apart to improve the smoothness of the rotation of the drive shaft 8, reduce friction, and axially limit the drive shaft 8, improving its coaxiality and preventing it from jumping in the axial direction.

[0029] Specifically, the centrifugal atomizing assembly 9 includes an upper centrifugal shroud 91 and a lower centrifugal disk 92. The lower centrifugal disk 92 is located inside the upper centrifugal shroud 91. The upper centrifugal shroud 91 and the lower centrifugal disk 92 are connected by multiple centrifugal columns 921. The outer periphery of the upper centrifugal shroud 91 has multiple downward-protruding turbulence columns 911, which are spaced apart along the circumferential direction. The middle part of the lower centrifugal shroud has a connecting protrusion 922. The lower end of the drive shaft 8 passes through the upper centrifugal shroud 91 and is fixedly connected to the connecting protrusion 922. The upper part of the lower centrifugal shroud has multiple arc-shaped guide protrusions 923 spaced apart along the circumferential direction. The outer end of each arc-shaped guide protrusion 923 is provided with a shearing protrusion 924. The outer periphery of the lower centrifugal shroud has multiple cutting teeth 925 along the circumferential direction. The upper centrifugal shroud 91 and the lower centrifugal disk 92 form a double-layer centrifugal flow channel, allowing the liquid to flow in layers between the two layers, reducing turbulence interference and improving flow stability. The liquid flows from the inside out under centrifugal force through the gap between two adjacent arc-shaped guide protrusions 923, increasing the tangential velocity component and thus enhancing the centrifugal force. Each arc-shaped guide protrusion 923 evenly distributes the liquid, improving atomization uniformity. The shearing protrusion 924 creates a stronger velocity gradient in the liquid flowing out of the lower centrifugal disk 92, increasing the shear force of the liquid film and causing it to break into filaments earlier, improving atomization. Furthermore, each cutting tooth 925 periodically cuts the ejected liquid film, breaking the continuous liquid film into discrete liquid filaments, significantly reducing the average droplet size. Each turbulence column 911 forms multiple micro-turbulents, periodically disturbing the liquid film, dividing the continuous liquid film into parallel liquid bands, generating a Karman vortex street, inducing high-frequency micro-turbulence, triggering unstable modes within the liquid film, promoting spontaneous filament breakage, and improving atomization.

[0030] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A centrifugal nozzle motor, comprising an upper shell (3), a middle shell (4), and a lower shell (5) arranged sequentially from top to bottom, wherein an electric speed controller (6) is disposed inside the upper shell (3), and a motor assembly (7) and a drive shaft (8) are disposed inside the middle shell (4), the motor assembly (7) and the drive shaft (8) being connected in a transmission connection, and the lower end of the drive shaft (8) passing through the lower shell (5) and connected to a centrifugal atomizing assembly (9), characterized in that: An upper heat dissipation chamber (11) is provided between the upper shell (3) and the middle shell (4), and a lower heat dissipation chamber (13) is provided between the middle shell (4) and the lower shell (5). Multiple side heat dissipation holes (12) are provided at intervals along the circumferential direction between the inner side wall and the outer side wall of the middle shell (4). The upper end of each side heat dissipation hole (12) is connected to the upper heat dissipation chamber (11), and the lower end of each side heat dissipation hole (12) is connected to the lower heat dissipation chamber (13). The upper heat dissipation chamber (11), each side heat dissipation hole (12) and the lower heat dissipation chamber (13) are connected to form a three-dimensional heat dissipation channel. A liquid inlet connector (2) is provided on one side of the upper heat dissipation chamber (11), and multiple liquid outlets (131) are provided in the middle of the lower heat dissipation chamber (13). Each liquid outlet (131) is provided at intervals along the circumferential direction and is located on the periphery of the drive shaft (8).

2. A centrifugal nozzle motor according to claim 1, characterized in that: Each of the side heat dissipation holes (12) and the upper heat dissipation chamber (11) is provided with a flow equalization hole (111), and the inner diameter of each flow equalization hole (111) gradually increases from the side adjacent to the liquid inlet connector (2) to the side away from the liquid inlet connector (2).

3. A centrifugal nozzle motor according to claim 1, characterized in that: The outer side of the middle shell (4) is provided with a plurality of annular heat dissipation fins (41), the inner ring of each annular heat dissipation fin (41) is formed on the outer side of the middle shell (4), and each annular heat dissipation fin (41) is spaced apart along the numerical direction.

4. A centrifugal nozzle motor according to claim 2, characterized in that: The inner shell (4) is provided with an upward-facing heat dissipation groove (42), a mounting cavity (43), and a sealing partition (44) for separating the heat dissipation groove (42) and the mounting cavity (43). The motor assembly (7) is located in the mounting cavity (43). The heat dissipation groove (42) and the upper shell (3) enclose the upper heat dissipation chamber (11). The outer edge of the sealing partition (44) is circumferentially formed on the inner wall of the inner shell (4). A sealing boss (441) is provided at the center of the upper end face of the sealing partition (44). The upper end face of the sealing boss (441) abuts against the lower end face of the upper shell (3). A first sealing ring (47) is provided between the sealing boss (441) and the upper shell (3). A lower mounting post (443) is provided at the center of the lower end face of (44). The lower mounting post (443) has a rotating shaft hole (444) that vertically penetrates the lower mounting post (443), the sealing partition (44) and the upper sealing platform. The driving shaft (8) is rotatably installed in the rotating shaft hole (444). The sealing boss (441) also has a lower wire hole (442). The lower end face of the upper shell (3) has an upper wire hole (331) that communicates with the inner cavity of the upper shell (3). The upper wire hole (331) and the lower wire hole (442) are aligned. The electric speed controller (6) is connected to the motor assembly (7) with a wire. The wire passes through the upper wire hole (331) and the lower wire hole (442).

5. A centrifugal nozzle motor according to claim 4, characterized in that: The lower part of the middle shell (4) is fixedly installed with a lower sealing cover (45), and a second sealing ring (48) is provided between the lower sealing cover (45) and the middle shell (4). The drive shaft (8) passes through the lower sealing cover (45) and is connected to the centrifugal atomizing component (9). An oil seal (451) is provided between the drive shaft (8) and the lower sealing cover (45).

6. A centrifugal nozzle motor according to claim 4, characterized in that: The upper shell (3) includes a connecting pipe (31), a conical shell (32) and an upper sealing cover (33). The lower end of the connecting pipe (31) is integrally formed with the upper end of the conical shell (32). The upper sealing cover (33) is fixedly installed on the lower end face of the conical shell (32). The upper sealing cover (33) and the heat dissipation groove (42) enclose the upper heat dissipation chamber (11). The upper end face of the middle shell (4) is provided with a sealing groove (445) along the contour direction. A third sealing ring (49) is embedded in the sealing groove (445). The upper part of the third sealing ring (49) protrudes out of the sealing groove (445) and abuts against the upper sealing cover (33). The lower end face of the upper sealing cover (33) is provided with a downward protruding sealing ring (332), which is fitted onto the sealing boss (441). The first sealing ring (47) is located between the sealing boss (441) and the sealing ring (332). A lower connecting part (46) extends from one side of the upper part of the middle shell (4). An upper connecting part (333) corresponding to the lower connecting part (46) is provided on one side of the upper sealing cover (33). The upper connecting part (333) is located above the lower connecting part (46). A connecting hole (334) is opened in the upper connecting part (333). The liquid inlet connector (2) is fixedly installed in the connecting hole (334).

7. A centrifugal nozzle motor according to claim 6, characterized in that: The upper end face of the upper sealing cover (33) is provided with a plurality of fixing posts (335), each fixing post (335) having an upward-facing threaded hole (336). The electric speed controller (6) is fixedly installed on each upper mounting post by screws. A thermally conductive gap (337) is provided between the electric speed controller (6) and the upper sealing cover (33), and the thermally conductive gap (337) is filled with thermally conductive silicone.

8. A centrifugal nozzle motor according to claim 4, characterized in that: The lower shell (5) includes an annular shell (51) and a circular shell (52). The lower part of the annular shell (51) is formed around the outer edge of the circular shell (52). The annular shell (51) is fitted onto the lower part of the middle shell (4). A fourth sealing ring (53) is provided between the outer side of the middle shell (4) and the inner side of the annular shell (51). The lower end faces of the annular shell (51), the circular shell (52), and the lower shell (5) enclose and form the lower heat dissipation chamber (13). An outer water-blocking ring (521) is provided in the middle of the upper end face of the shell (52), and each of the liquid outlets (131) is provided on the outer periphery of the outer water-blocking ring (521). An inner water-blocking ring (452) with downward protrusion is provided on the lower end face of the middle shell (4). The inner water-blocking ring (452) is inserted into the inner ring of the outer water-blocking ring (521). The upper part of the outer water-blocking ring (521) abuts against the middle shell (4), and the lower edge of each liquid outlet (131) extends downward to form a drainage part (132).

9. A centrifugal nozzle motor according to any one of claims 4 to 8, characterized in that: The motor assembly (7) includes a rotor (71), a stator (72), a magnetic yoke (73), a coil, and multiple magnets (74). The rotor (71) is fixedly installed on the lower part of the drive shaft (8), the stator (72) is fixedly installed on the lower mounting post (443), the coil is wound on the stator (72), the magnetic yoke (73) is fixedly installed on the outer periphery of the rotor (71), the upper part of the rotor (71) is provided with multiple upwardly protruding spacer teeth (711) at equal intervals along the circumferential direction, each spacer tooth (711) is located on the inner side of the magnetic yoke (73), each magnet (74) is provided between two adjacent spacer teeth (711), and the middle part of the rotor (71) is provided with multiple motor heat dissipation holes (712) that penetrate the rotor (71) at intervals along the circumferential direction. At least two bearings (81) are provided between the rotating shaft hole (444) and the drive shaft (8). The two bearings (81) are located at the upper and lower ends of the rotating shaft hole (444) respectively. A retaining ring (82) is provided at the upper end of the drive shaft (8). A retaining ring (83) is provided between the retaining ring (82) and the bearing (81).

10. A centrifugal nozzle motor according to claim 9, characterized in that: The centrifugal atomizing component (9) includes an upper centrifugal hood (91) and a lower centrifugal disc (92). The lower centrifugal disc (92) is located inside the upper centrifugal hood (91). The upper centrifugal hood (91) and the lower centrifugal disc (92) are connected by multiple centrifugal columns (921). Multiple downward-protruding turbulence columns (911) are provided on the outer periphery of the upper centrifugal hood (91). Each turbulence column (911) is spaced apart along the circumferential direction. A connecting protrusion (922) is provided in the middle of the lower centrifuge shroud. The lower end of the drive shaft (8) passes through the upper centrifuge shroud (91) and is fixedly connected to the connecting protrusion (922). Multiple arc-shaped guide protrusions (923) are provided at intervals along the circumferential direction on the upper part of the lower centrifuge shroud. Each arc-shaped guide protrusion (923) has a shearing protrusion (924) at its outer end. Multiple cutting teeth (925) are provided along the circumferential direction on the outer edge of the lower centrifuge shroud.

Images