PCB motor

Abstract

The utility model belongs to the technical field of motors, and discloses a PCB motor. The PCB motor comprises a shell, a stator and a heat dissipation structure, the stator and the heat dissipation structure are both arranged in the shell, the heat dissipation structure comprises an evaporation part and a condensation part, the evaporation part is provided with an evaporation channel, the condensation part is provided with a condensation channel, and the evaporation channel and the condensation channel are communicated end to end to form a cooling circulation loop. A gas-liquid phase change medium is arranged in the cooling circulation loop; the evaporation part is attached to the stator, and the condensation part is attached to the inner wall of the shell. According to the heat dissipation structure of the PCB motor, heat generated by the stator can be dissipated through the shell, the performance of the PCB motor is further ensured, the structure is simple, and the size advantage of the PCB motor can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a PCB motor. Background Art

[0002] Compared to other motor types, axial motors with PCB (printed circuit board) stators offer advantages in manufacturing, structure, and performance. Because the windings are located on the PCB, they can be easily mass-produced using the highly mature PCB manufacturing industry. Furthermore, the PCB-structured winding coils further shorten the motor's axial dimensions, making the structure more compact. This also reduces motor weight, improves efficiency, and significantly increases power density.

[0003] For PCB disc motors, in order to compress the axial size of the PCB disc motor, glass fiber materials with poor thermal conductivity are used, resulting in a more significant temperature rise in the motor. Thermal performance is an important indicator for measuring motor performance. A higher motor temperature rise not only affects the service life but also damages the insulation material, affecting the safe and reliable operation of the motor.

[0004] Therefore, a PCB motor is needed to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a PCB motor with a heat dissipation structure, which can have a good heat dissipation effect and ensure the performance of the PCB motor.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A PCB motor includes a housing, a stator, a motor, a rotor and a heat dissipation structure. The motor shaft is rotatably arranged in the housing. The stator, the rotor and the heat dissipation structure are all arranged inside the housing. The heat dissipation structure includes an evaporation portion and a condensation portion. The evaporation portion is provided with an evaporation channel, and the condensation portion is provided with a condensation channel. The evaporation channel and the condensation channel are connected end to end to form a cooling circulation loop. A gas-liquid phase change medium is provided in the cooling circulation loop. The evaporation portion and the stator are arranged in close contact with each other, and the condensation portion is arranged in close contact with the inner wall of the housing.

[0008] As an optional technical solution, the evaporation portion is annular and closely attached to the end surface of the stator, and the condensation portion is connected to an end of the evaporation portion away from the motor shaft.

[0009] As an optional technical solution, two heat dissipation structures are provided, and the two heat dissipation structures are respectively located at two ends of the stator in the axial direction.

[0010] As an optional technical solution, the evaporation part is provided with a liquid collecting chamber and an air collecting chamber, the air collecting chamber is located above the liquid collecting chamber, the upper end of the evaporation channel is connected to the air collecting chamber, the lower end of the evaporation channel is connected to the liquid collecting chamber, the upper end of the condensation channel is connected to the air collecting chamber, and the lower end of the condensation channel is connected to the liquid collecting chamber.

[0011] As an optional technical solution, the volume of the gas collecting chamber is smaller than the volume of the liquid collecting chamber.

[0012] As an optional technical solution, the condensation part is provided with a first transition chamber and a second transition chamber, the first transition chamber is provided between the gas collecting chamber and the condensation channel, and the second transition chamber is provided between the liquid collecting chamber and the condensation channel.

[0013] As an optional technical solution, a plurality of evaporation channels are provided, and the plurality of evaporation channels are arranged at intervals.

[0014] As an optional technical solution, the condensation channel is a wave-shaped channel extending along the circumference of the stator.

[0015] As an optional technical solution, the heat dissipation structure is symmetrically arranged about a preset plane, the central axis of the stator is located in the preset plane, and the preset plane is a vertical plane.

[0016] As an optional technical solution, the inner cavity of the shell forms an air channel, the shell is provided with an air inlet and an air outlet, the two ends of the air channel are respectively connected to the air inlet and the air outlet, and a cooling fan is provided in the air channel.

[0017] Beneficial effects of the utility model:

[0018] The utility model discloses a PCB motor, which includes a shell, a stator and a heat dissipation structure. The stator and the heat dissipation structure are both arranged inside the shell. The heat dissipation structure includes an evaporation part and a condensation part. The evaporation part is provided with an evaporation channel, and the condensation part is provided with a condensation channel. The evaporation channel and the condensation channel are connected end to end to form a cooling circulation loop. A gas-liquid phase change medium is provided in the cooling circulation loop. The evaporation part and the stator are arranged in affixed manner, and the condensation part is arranged in affixed manner to the inner wall of the shell. The gas-liquid phase change medium and the heat conduction medium move between the evaporation part and the condensation part to conduct heat. The evaporation part and the stator are arranged in affixed manner, and the condensation part and the shell are arranged in affixed manner. Therefore, the heat dissipation structure of the PCB motor can dissipate the heat generated by the stator through the shell, thereby ensuring the performance of the PCB motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the PCB motor in an embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the PCB motor in the embodiment of the present utility model;

[0021] Figure 3 This is a front view of the PCB motor in the embodiment of the present utility model;

[0022] Figure 4 yes Figure 3 Cross-sectional view of AA;

[0023] Figure 5 yes Figure 4 A partial enlarged view of B in the middle;

[0024] Figure 6 is a schematic diagram of a first housing according to an embodiment of the present utility model;

[0025] Figure 7 It is a schematic diagram of the heat dissipation structure of an embodiment of the utility model;

[0026] Figure 8 This is a perspective view of the heat dissipation structure of an embodiment of the present utility model;

[0027] Figure 9 This is a side view of the heat dissipation structure of an embodiment of the utility model;

[0028] Figure 10 yes Figure 9 Cross-sectional view of CC;

[0029] Figure 11 yes Figure 9 Cutaway perspective view of DD.

[0030] In the picture:

[0031] 10. Housing; 11. First housing; 111. Accommodation slot; 12. Second housing;

[0032] 20. stator; 21. protrusion;

[0033] 30. Heat dissipation structure; 31. Evaporation unit; 311. Evaporation channel; 312. Liquid collecting chamber; 313. Gas collecting chamber; 32. Condensation unit; 321. Condensation channel; 322. First transition chamber; 323. Second transition chamber;

[0034] 40. Motor shaft; 41. Connecting portion;

[0035] 50. Rotor;

[0036] 60. Bearings. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0038] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0041] like Figures 1 to 11As shown, this embodiment provides a PCB motor, which includes a housing 10, a stator 20, and a heat dissipation structure 30. The stator 20 and the heat dissipation structure 30 are both disposed within the housing 10. The heat dissipation structure 30 includes an evaporation portion 31 and a condensation portion 32. The evaporation portion 31 is provided with an evaporation channel 311, and the condensation portion 32 is provided with a condensation channel 321. The evaporation channel 311 and the condensation channel 321 are connected end to end to form a cooling circuit. A gas-liquid phase change medium is disposed within the cooling circuit. The evaporation portion 31 and the stator 20 are disposed in contact with each other, and the condensation portion 32 is disposed in contact with the inner wall of the housing 10. The gas-liquid phase change medium can be an existing phase change material such as docosane or hexadecane, and the phase change temperature is required to be between 50°C and 80°C.

[0042] Specifically, in this embodiment, the stator 20 of the PCB motor is fixed to the inner wall of the shell 10, the evaporation part 31 of the heat dissipation structure 30 is fitted with the stator 20, and the condensation part 32 of the heat dissipation structure 30 is fitted with the inner wall of the shell 10. An evaporation channel 311 is provided inside the evaporation part 31, and a condensation channel 321 is provided inside the condensation part 32. The gas-liquid phase change medium provided in the cooling circulation loop formed by connecting the evaporation channel 311 and the condensation channel 321 end to end circulates back and forth between the evaporation channel 311 and the condensation channel 321, thereby transferring the heat of the stator 20 to the shell 10, thereby ensuring that the temperature rise of the stator 20 will not affect the performance of the PCB motor.

[0043] Furthermore, if Figures 7 to 11 As shown, the evaporation portion 31 is annular and closely attached to the end face of the stator 20, and the condensation portion 32 is connected to the end of the evaporation portion 31 away from the motor shaft 40. Specifically, in this embodiment, this arrangement enables the evaporation portion 31 to be attached to the axial end face of the stator 20, and the evaporation portion 31 is annular, that is, extends along the radial direction of the stator 20, which can increase the contact area between the evaporation portion 31 and the stator 20, which is beneficial to the improvement of the heat transfer effect, and the condensation portion 32 is connected to the end of the evaporation portion 31 away from the motor shaft 40, which facilitates the condensation portion 32 to be attached to the housing 10, so that the stator 20, the evaporation portion 31 and the condensation portion 32 are arranged along a certain direction, thereby allowing heat to be transferred along a fixed direction, ensuring that the heat gradually decreases, which is beneficial to the heat transfer.

[0044] Furthermore, two heat dissipation structures 30 are provided, and the two heat dissipation structures 30 are respectively located at the two ends of the stator 20 along the axial direction. Specifically, in this embodiment, the PCB motor further includes a motor shaft 40 and a rotor 50. The two rotors 50 are provided on the motor shaft 40, and the two rotors 50 are provided at intervals. The stator 20 is provided between the two rotors 50. The two heat dissipation structures 30 are respectively located at the two ends of the stator 20 along the axial direction. The condensation parts 32 of the two heat dissipation structures 30 are attached to the housing 10, and the evaporation parts 31 of the two heat dissipation structures 30 are respectively attached to both sides of the stator 20 for absorbing the heat of the stator 20. The two heat dissipation structures 30 are used to dissipate heat from both ends of the stator 20 at the same time, thereby improving the efficiency of heat transfer from the stator 20 and ensuring the temperature of the stator 20 during use.

[0045] For further information, please refer to Figure 10 The evaporation portion 31 is provided with a liquid collecting chamber 312 and an air collecting chamber 313. The air collecting chamber 313 is located above the liquid collecting chamber 312. The upper end of the evaporation channel 311 is connected to the air collecting chamber 313, and the lower end of the evaporation channel 311 is connected to the liquid collecting chamber 312. The upper end of the condensation channel 321 is connected to the air collecting chamber 313, and the lower end of the condensation channel 321 is connected to the liquid collecting chamber 312.

[0046] Specifically, in this embodiment, the liquid collecting chamber 312 is used to accommodate a gas-liquid phase change medium in a liquid state, and the gas collecting chamber 313 is used to accommodate a gas-liquid phase change medium in a gaseous state. When the PCB motor stops working, the temperature of the gas-liquid thermal conductive medium is low and is in a liquid state, so it will be accommodated in the liquid collecting chamber 312. When the PCB motor is working, the temperature of the stator 20 rises, and the gas-liquid thermal conductive medium in the liquid collecting chamber 312 is converted into a gaseous state. The gaseous gas-liquid thermal conductive medium will enter the gas collecting chamber 313 along the evaporation chamber, and then transfer the heat of the stator 20.

[0047] For further information, please refer to Figure 10 The volume of the gas collecting chamber 313 is smaller than that of the liquid collecting chamber 312. Specifically, in this embodiment, as the temperature of the stator 20 increases, the gas-liquid heat conducting medium in a liquid state gradually transforms into a gaseous state. The gas collecting chamber 313 is used to accommodate the gas-liquid heat conducting medium in a gaseous state. As more and more gaseous gas-liquid heat conducting medium enters the gas collecting chamber 313, the pressure of the gas collecting chamber 313 increases, which helps the gas-liquid heat conducting medium in the gas collecting chamber 313 enter the condensation channel 321, thereby improving the efficiency of temperature transfer.

[0048] For further information, please refer to Figure 8The condensation portion 32 is provided with a first transition chamber 322 and a second transition chamber 323. The first transition chamber 322 is provided between the gas collecting chamber 313 and the condensation channel 321, and the second transition chamber 323 is provided between the liquid collecting chamber 312 and the condensation channel 321. Specifically, in this embodiment, the first transition chamber 322 is provided between the gas collecting chamber 313 and the condensation channel 321, and is used to transition between the gas collecting chamber 313 and the condensation channel 321. It can provide a buffer between the gas collecting chamber 313 and the condensation channel 321, which is conducive to the gas-liquid phase change medium in a gaseous state entering the condensation channel 321; the second transition chamber 323 is provided between the liquid collecting chamber 312 and the condensation channel 321, and is used to provide a buffer between the liquid collecting chamber 312 and the condensation channel 321, which is conducive to the gas-liquid phase change medium in a liquid state entering the liquid collecting chamber 312.

[0049] Furthermore, a plurality of evaporation channels 311 are provided, and the plurality of evaporation channels 311 are spaced apart. Specifically, in this embodiment, the plurality of evaporation channels 311 are arc-shaped and concentrically spaced apart on the circumferential surface of the evaporation portion 31, thereby providing guidance for the gas-liquid heat transfer medium in a gaseous state and improving the transport efficiency of the gas-liquid heat transfer medium in a gaseous state.

[0050] For further information, please refer to Figure 11 The condensation channel 321 is a wavy channel extending along the circumference of the stator 20. Specifically, in this embodiment, the condensation channel 321 is a rectangular wave, which can increase the contact area between the condensation channel 321 and the housing 10, ensuring the heat conduction effect between the condensation portion 32 and the housing 10.

[0051] Furthermore, the heat dissipation structure 30 is symmetrically arranged about a predetermined plane, and the central axis of the stator 20 lies in the predetermined plane, which is a vertical plane. Specifically, in this embodiment, the central axis of the stator 20 extends horizontally and lies within the predetermined plane. The symmetrical arrangement of the heat dissipation structure 30 about the predetermined plane can improve the phase transition smoothness of the gas-liquid phase change medium, ensure the thermal conductivity of the gas-liquid phase change medium, and thus ensure heat transfer from the stator 20.

[0052] In this embodiment, please refer to Figure 4 The motor shaft 40 includes a connecting portion 41 having a connecting hole, a through hole provided on one rotor 50, and a threaded hole provided on the other rotor 50. Bolts pass through the through holes and the connecting hole and are then threadedly connected to the threaded holes to connect the two rotors 50 to the motor shaft 40. Specifically, in this embodiment, the rotors 50 are connected to the motor shaft 40 using a bolted connection method, which provides a stable connection and facilitates disassembly.

[0053] In other embodiments, the rotor 50 is directly press-fitted onto the motor shaft 40 , or the rotor 50 and the motor shaft 40 are connected via a key, which will not be described in detail here.

[0054] In this embodiment, please refer to Figure 2 and Figure 6 The housing 10 includes a first housing 11 and a second housing 12. One of the first housing 11 and the second housing 12 is provided with a receiving groove 111. The stator 20 is provided with a protrusion 21, which is received in the receiving groove 111. Specifically, in this embodiment, the first housing 11 is provided with the receiving groove 111, and the stator 20 is provided with the protrusion 21. The protrusion 21 is received in the receiving groove 111, thereby limiting the position of the stator 20 and ensuring the function of the stator 20.

[0055] In this embodiment, one of the first housing 11 and the second housing 12 is provided with a connecting through-hole, and the other of the first housing 11 and the second housing 12 is provided with a connecting threaded hole. A locking screw passes through the connecting through-hole and is threadedly connected to the connecting threaded hole, thereby connecting the first housing 11 and the second housing 12. Specifically, in this embodiment, the use of the locking screw to connect the first housing 11 and the second housing 12 provides a stable connection and facilitates assembly and disassembly.

[0056] In this embodiment, the motor shaft 40 is rotatably disposed in the first housing 11 and the second housing 12 via a bearing 60. Specifically, in this embodiment, the motor shaft 40 is rotatably disposed in the first housing 11 and the second housing 12 via a bearing 60, thereby ensuring normal rotation of the motor shaft 40 and normal use of the motor.

[0057] Furthermore, the inner cavity of the housing 10 forms an air passage, and the housing 10 is provided with an air inlet and an air outlet. The two ends of the air passage are connected to the air inlet and the air outlet respectively, and a cooling fan is provided in the air passage. Specifically, in this embodiment, a cooling fan is provided in the air passage inside the housing 10. When the cooling fan is in operation, it can draw cold air from the air inlet, exchange heat with the housing 10 after passing through the housing 10, and then be discharged through the air outlet, thereby improving the heat dissipation efficiency of the housing 10. The installation of the cooling fan is consistent with that of existing air-cooled motors and will not be described in detail here.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. PCB motor, characterized in that, The PCB motor comprises a housing (10), a stator (20), a motor shaft (40), a rotor (50) and a heat dissipation structure (30); the motor shaft (40) is rotatably arranged on the housing (10); the stator (20), the rotor (50) and the heat dissipation structure (30) are all arranged inside the housing (10); the heat dissipation structure (30) comprises an evaporation portion (31) and a condensation portion (32); the evaporation portion (31) is provided with an evaporation channel (311); the condensation portion (322) is provided with a condensation channel (321); the evaporation channel (311) and the condensation channel (321) are connected end to end to form a cooling circulation loop; a gas-liquid phase change medium is arranged in the cooling circulation loop; the evaporation portion (31) and the stator (20) are arranged in close contact with each other, and the condensation portion (32) is arranged in close contact with the inner wall of the housing (10).

2. The PCB motor according to claim 1, characterized in that: The evaporation portion (31) is annular and closely attached to the end surface of the stator (20), and the condensation portion (32) is connected to an end of the evaporation portion (31) away from the motor shaft (40).

3. The PCB motor according to claim 2, characterized in that: Two heat dissipation structures (30) are provided, and the two heat dissipation structures (30) are respectively located at two ends of the stator (20) along the axial direction.

4. The PCB motor according to claim 1, characterized in that: The evaporation portion (31) is provided with a liquid collecting chamber (312) and an air collecting chamber (313), the air collecting chamber (313) is located above the liquid collecting chamber (312), the upper end of the evaporation channel (311) is communicated with the air collecting chamber (313), the lower end of the evaporation channel (311) is communicated with the liquid collecting chamber (312), the upper end of the condensation channel (321) is communicated with the air collecting chamber (313), and the lower end of the condensation channel (321) is communicated with the liquid collecting chamber (312).

5. The PCB motor according to claim 4, characterized in that: The volume of the gas collecting chamber (313) is smaller than the volume of the liquid collecting chamber (312).

6. The PCB motor according to claim 4, characterized in that: The condensation portion (32) is provided with a first transition chamber (322) and a second transition chamber (323), wherein the first transition chamber (322) is provided between the gas collecting chamber (313) and the condensation channel (321), and the second transition chamber (323) is provided between the liquid collecting chamber (312) and the condensation channel (321).

7. The PCB motor according to claim 1, characterized in that: A plurality of evaporation channels (311) are provided, and the plurality of evaporation channels (311) are arranged at intervals.

8. The PCB motor according to claim 7, characterized in that: The condensation channel (321) is a wave-shaped channel extending along the circumference of the stator (20).

9. The PCB motor according to any one of claims 1 to 8, characterized in that: The heat dissipation structure (30) is symmetrically arranged about a preset plane, the central axis of the stator (20) is located on the preset plane, and the preset plane is a vertical plane.

10. The PCB motor according to claim 9, characterized in that: The inner cavity of the shell (10) forms an air channel, and the shell (10) is provided with an air inlet and an air outlet. The two ends of the air channel are respectively connected to the air inlet and the air outlet, and a cooling fan is provided in the air channel.

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