Variable frequency motor

Abstract

The utility model relates to the technical field of motors, and particularly discloses a variable frequency motor, which comprises an inner shell, an outer shell and a frequency converter shell, a cooling part and a wire passing part are arranged on the outer side of the inner shell along the axial direction of the inner shell, the wire passing part is provided with a first wire passing hole for a three-phase wire to pass through, and the cooling part is provided with a cooling liquid groove. The groove wall of the cooling liquid groove and the inner side wall of the outer shell form a cooling liquid flow channel, cooling liquid flows in the cooling liquid flow channel, and at least part of the frequency conversion control panel is attached to the outer side of the outer shell, so that the stator and the frequency conversion control panel can be cooled through the inner shell and the outer shell respectively, the internal space of the inner shell does not need to be additionally occupied, and the axial size of the whole machine is small. And the method can be applied to more use scenes. The frequency converter shell covers the shell and is detachably connected with the shell, the frequency converter shell is provided with a containing space, the frequency conversion control panel is located in the containing space, and the first wire passing hole is communicated with the containing space. And the frequency conversion control panel can be maintained only by disassembling the frequency converter shell, so that the maintenance difficulty and the workload are reduced.

Description

Technical Field

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

[0002] The variable-frequency integrated motor integrates the frequency converter and the motor, thereby improving the structural compactness and facilitating operation. The traditional variable-frequency integrated motor usually adopts an air-cooling cooling method, and a frequency converter heat dissipation plate is arranged between the frequency converter and the motor, thereby greatly increasing the overall height, and the center of gravity of the whole machine is deviated outward during installation, and the vibration noise during operation increases.

[0003] In response to this, a water-cooling technical solution is provided in the prior art. The relevant functional modules of the frequency converter are arranged inside the motor housing, and a water channel is arranged in the motor housing, so as to realize cooling of the stator and the frequency converter at the same time, so as to reduce the overall height and overcome the problem of outward deviation of the center of gravity. However, the arrangement of the frequency converter inside the motor increases the axial dimension of the motor, resulting in limited application scenarios of the motor. In addition, when maintaining the frequency converter, the whole machine needs to be disassembled to complete, which increases the maintenance difficulty and workload. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a variable-frequency motor to solve the problems of increased axial dimension of the motor and greater maintenance difficulty existing in the prior art.

[0005] The utility model provides a variable-frequency motor, which includes a variable-frequency control board and a stator. The variable-frequency control board is electrically connected to the stator through three-phase wires. It also includes an inner shell and an outer shell. The outer shell is fixedly sleeved outside the inner shell. The stator is arranged inside the inner shell. A cooling part and a wire passing part are arranged along the axial direction on the outer side of the inner shell. The wire passing part is provided with a first wire passing hole for the three-phase wires to pass through. The cooling part is provided with a coolant tank. A coolant flow channel is formed between the tank wall of the coolant tank and the inner side wall of the outer shell. Coolant flows in the coolant flow channel, and the coolant is used to cool the inner shell and the outer shell. At least part of the variable-frequency control board is attached to the outer side of the outer shell;

[0006] A frequency converter housing covers the outer shell and is detachably connected to the outer shell. The frequency converter housing has an accommodation space. The variable-frequency control board is located in the accommodation space, and the first wire passing hole is communicated with the accommodation space.

[0007] As a preferred technical solution of the variable-frequency motor, it further includes an adapter. The frequency converter housing is provided with a positioning hole. At least part of the adapter is matched with the hole wall of the positioning hole. The adapter is fixedly connected to the wire passing part. The adapter is provided with a second wire passing hole for the three-phase wires to pass through, and the second wire passing hole is communicated with the first wire passing hole.

[0008] As a preferred technical solution of the variable-frequency motor, the wire passing part is provided with threaded holes, the adapter is provided with connection holes, the connection holes are arranged as waist-shaped holes or elliptical holes, and the screws pass through the connection holes and are threadedly connected with the threaded holes.

[0009] As a preferred technical solution of the variable-frequency motor,

[0010] One of the cooling part and the housing is provided with two first sealing grooves, the two first sealing grooves are respectively located at both ends of the coolant tank and are spaced from the coolant tank, and first sealing members are arranged in the first sealing grooves for sealing the housing and the inner shell;

[0011] One of the wire passing part and the adapter is provided with a second sealing groove, and a second sealing member is arranged in the second sealing groove for sealing the adapter and the wire passing part;

[0012] One of the adapter and the frequency converter housing is provided with a third sealing groove, and a third sealing member is arranged in the third sealing groove for sealing the adapter and the frequency converter housing.

[0013] As a preferred technical solution of the variable-frequency motor, the adapter is provided with a plurality of third sealing grooves, the plurality of third sealing grooves are spaced along the axial direction of the adapter, and third sealing members are arranged in the plurality of third sealing grooves.

[0014] As a preferred technical solution of the variable-frequency motor, the housing is provided with a heat dissipation seat and a mounting seat, the variable-frequency control board is fixedly mounted on the mounting seat, the heat dissipation seat is provided with a heat dissipation plane, and at least part of the variable-frequency control board is attached to the heat dissipation plane.

[0015] As a preferred technical solution of the variable-frequency motor, the housing is further provided with heat dissipation ribs, the heat dissipation ribs include a plurality of heat dissipation sub-ribs that crisscross each other, and the heat dissipation ribs are used for dissipating heat from the variable-frequency control board.

[0016] As a preferred technical solution of the variable-frequency motor, the housing is provided with a positioning groove, the frequency converter housing is provided with a positioning boss, and the positioning boss can be inserted into the positioning groove and fit with the groove wall of the positioning groove.

[0017] As a preferred technical solution of the variable-frequency motor, it further includes a frequency converter cover plate, the frequency converter housing is further provided with a cover plate opening, and the frequency converter cover plate is fixedly connected to the frequency converter housing and seals the cover plate opening.

[0018] As a preferred technical solution of the variable-frequency motor, the coolant tank is arranged as a spiral structure, the housing is provided with two coolant connectors, the two coolant connectors are respectively communicated with both ends of the coolant flow channel, one of the coolant connectors is used for supplying coolant to the coolant flow channel, and the other coolant connector is used for discharging the coolant in the coolant flow channel.

[0019] The beneficial effects of the present utility model are:

[0020] The present utility model provides a variable-frequency motor. A coolant flow channel is formed by an inner shell and an outer shell. The coolant cools the inner shell and the outer shell simultaneously. The stator and the variable-frequency control board can be cooled through the inner shell and the outer shell respectively, without additionally occupying the internal space of the inner shell. Thus, the axial dimension of the whole machine is relatively small, and it can be applied to more usage scenarios. And a frequency converter housing detachably connected to the outer shell is provided to accommodate the variable-frequency control board. Only by detaching the frequency converter housing can the maintenance of the variable-frequency control board be realized, reducing the difficulty and workload of maintenance. Description of the Drawings

[0021] Figure 1 Schematic structural diagram of the variable-frequency motor in an embodiment of the present utility model;

[0022] Figure 2 Cross-sectional view of the variable-frequency motor in an embodiment of the present utility model;

[0023] Figure 3 For Figure 2 Partial enlarged view of part A in

[0024] Figure 4 Schematic structural diagram of the inner shell in an embodiment of the present utility model;

[0025] Figure 5 Cross-sectional view of the inner shell in an embodiment of the present utility model;

[0026] Figure 6 For Figure 5 Partial enlarged view of part B in

[0027] Figure 7 Schematic structural diagram of the outer shell in an embodiment of the present utility model;

[0028] Figure 8 Cross-sectional view of the outer shell in an embodiment of the present utility model;

[0029] Figure 9 Schematic structural diagram of the frequency converter housing in a first perspective in an embodiment of the present utility model;

[0030] Figure 10 Schematic structural diagram of the frequency converter housing in a second perspective in an embodiment of the present utility model;

[0031] Figure 11 Schematic structural diagram of the adapter in an embodiment of the present utility model;

[0032] Figure 12 Cross-sectional view of the adapter in an embodiment of the present utility model;

[0033] Figure 13 Schematic structural diagram of the frequency converter cover plate in an embodiment of the present utility model;

[0034] Figure 14 This is a cross-sectional view of the frequency converter cover plate in the embodiment of the present utility model;

[0035] Figure 15 It is Figure 14 a partial enlarged view of part C in

[0036] In the figure:

[0037] 100, stator;

[0038] 1, inner shell; 11, first sealing groove; 12, coolant groove; 13, second sealing groove; 14, threaded hole; 15, first wire passing hole;

[0039] 2, outer shell; 21, heat dissipation seat; 22, heat dissipation rib; 23, mounting seat; 24, positioning groove; 25, coolant connector;

[0040] 3, frequency conversion control board;

[0041] 4, frequency converter housing; 41, positioning boss; 42, cover plate opening; 43, positioning hole;

[0042] 5, adapter; 51, third sealing groove; 52, connection hole; 53, limiting boss; 54, second wire passing hole;

[0043] 61, first sealing member; 62, second sealing member; 63, third sealing member;

[0044] 7, screw;

[0045] 8, frequency converter cover plate; 81, flange; 811, chamfer. Detailed implementation manners

[0046] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0047] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0048] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0049] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0050] As Figures 1-15As shown in the figure, the present utility model provides a variable frequency motor. The variable frequency control board 3 of this variable frequency motor is integrated on the motor housing, and the variable frequency control board 3 and the stator 100 are cooled simultaneously through the housing, so as to reduce the overall height and overcome the problem of out-of-balance center of gravity, and reduce vibration and noise during operation. The variable frequency motor in this embodiment includes a variable frequency control board 3 and a stator 100. The variable frequency control board 3 and the stator 100 are electrically connected through three-phase wires, so that the rotation speed and direction of the motor output shaft can be controlled through the variable frequency control board 3. The housing of the variable frequency motor includes an inner housing 1 and an outer housing 2. The outer housing 2 is fixedly sleeved outside the inner housing 1, and the length of the outer housing 2 is less than the length of the inner housing 1, that is, a part of the inner housing 1 extends out of the outer housing 2. The stator 100 is arranged inside the inner housing 1. A cooling part and a wire passing part are arranged along the axial direction on the outer side of the inner housing 1. In this embodiment, the outer housing 2 is sleeved on the cooling part of the inner housing 1, and the wire passing part of the inner housing 1 extends out of the outer housing 2. The wire passing part is provided with a first wire passing hole 15 for the three-phase wires to pass through. The cooling part is provided with a coolant tank 12. The tank wall of the coolant tank 12 can form a coolant flow channel with the inner side wall of the outer housing 2. Coolant flows in the coolant flow channel, and the coolant is used to cool the inner housing 1 and the outer housing 2. Two seals are also arranged between the inner housing 1 and the outer housing 2, and the two seals are respectively located at both ends of the coolant flow channel for sealing. At least part of the variable frequency control board 3 is attached to the outer side of the outer housing 2. When the coolant flowing in the coolant flow channel takes away the heat from the stator 100 and the variable frequency control board 3, the stator 100 and the variable frequency control board 3 can be cooled simultaneously. The coolant in this embodiment can be antifreeze or cooling water, and those skilled in the art can select according to the use environment. For example, if the use environment temperature is relatively low, antifreeze can be selected to avoid freezing. The variable frequency control board 3 in this embodiment is arranged on the outer side of the outer housing 2, which can realize simultaneous cooling with the stator 100 without additionally occupying the internal space of the inner housing 1, so the axial dimension of the whole machine is small and it can be applied to more use scenarios. The variable frequency motor is also provided with a frequency converter housing 4 for protecting the variable frequency control board 3 and installing operation buttons or a screen. The frequency converter housing 4 covers the outer housing 2 and is detachably connected to the outer housing 2. The connection method can be snap connection or connection using fasteners. The frequency converter housing 4 has an accommodating space. When the frequency converter housing 4 covers the outer housing 2 and is connected to the outer housing 2, the variable frequency control board 3 is located in the accommodating space, and the first wire passing hole 15 of the wire passing part of the inner housing 1 is communicated with the accommodating space. When the variable frequency control board 3 needs to be maintained, only the frequency converter housing 4 needs to be disassembled to realize the maintenance of the frequency converter, reducing the difficulty and workload of maintenance.

[0051] Specifically, in other embodiments, the coolant tank 12 can also be arranged on the inner side wall of the outer shell 2. When it cooperates with the outer side wall of the inner shell 1, a coolant flow channel can also be formed. Considering the convenience of processing, in this embodiment, it is preferably to arrange the coolant tank 12 on the outer side wall of the inner shell 1. The coolant tank 12 is preferably arranged in a spiral structure. There are two cooling joints arranged on the outer shell 2, and the two cooling joints are respectively communicated with both ends of the coolant flow channel. One of the coolant joints 25 is used to supply coolant to the coolant flow channel, and the other coolant joint 25 is used to discharge the coolant in the coolant flow channel. The two coolant structures are respectively connected to the inlet and outlet of the circulation pump to achieve circulation. And a heat dissipation device can be arranged on the circulation flow path between the coolant joint 25 and the circulation pump to improve the cooling effect of the coolant. The specific structure and connection method are not elaborated in this embodiment.

[0052] Further, as Figures 1-4 shown, the wire passing part of the inner shell 1 extends out of the outer shell 2. To ensure that the first wire passing hole 15 can be reliably communicated with the accommodation space in the frequency converter housing 4, the variable frequency motor further includes an adapter 5. The adapter 5 is used to connect the inner shell 1 and the frequency converter housing 4, while realizing the communication between the first wire passing hole 15 and the accommodation space and ensuring good sealing performance at the connection joint. Specifically, please refer to Figures 2-3 , and in combination with Figure 10 , the frequency converter housing 4 is provided with a positioning hole 43, and at least part of the adapter 5 cooperates with the hole wall of the positioning hole 43. The adapter 5 is fixedly connected to the wire passing part, so as to realize the connection between the inner shell 1 and the frequency converter housing 4. The adapter 5 is provided with a second wire passing hole 54 for the three-phase wire to pass through, and the second wire passing hole 54 is communicated with the first wire passing hole 15. When the adapter 5 is fixedly connected to the wire passing part, the second wire passing hole 54 is aligned with the first wire passing hole 15 to ensure the smooth passing of the three-phase wire. The adapter 5 and the frequency converter housing 4 can be sealed by setting a sealing member or interference fit, and the adapter 5 and the wire passing part can be sealed by setting a sealing member or welding. In this embodiment, to improve the interchangeability of parts, the adapter 5 and the frequency converter housing 4 and the wire passing part are both sealed by sealing members.

[0053] Specifically, as Figures 2-4 shown, and in combination with Figures 11-12 , the adapter 5 and the wire passing part are fixedly connected by screws 7. Correspondingly, the adapter 5 is provided with a connection hole 52 for the screws 7 to pass through, and the wire passing part is provided with a threaded hole 14 for threaded connection with the screws 7. Since the frequency converter housing 4 is connected to the outer shell 2, and at the same time the frequency converter housing 4 is connected to the inner shell 1 through the adapter 5, to avoid the situation that the connection hole 52 and the threaded hole 14 are misaligned due to excessive restraint and cannot be installed, the connection hole 52 is set as a waist-shaped hole or an elliptical hole to ensure that the screws 7 can pass through the connection hole 52 smoothly and be threadedly connected with the threaded hole 14.

[0054] Specifically, one of the cooling part and the housing 2 is provided with two first sealing grooves 11. Both of the two first sealing grooves 11 are annular structures. The two first sealing grooves 11 are respectively located at both ends of the coolant tank 12 and are arranged at intervals with the coolant tank 12. A first sealing member 61 is arranged in the first sealing groove 11. The first sealing member 61 can be set as a sealing ring for sealing the housing 2 and the inner housing 1. In this embodiment, the first sealing groove 11 is arranged on the cooling part, as Figure 5 shown. In other embodiments, the first sealing groove 11 can also be arranged on the inner side wall of the housing 2. Please refer to Figures 2-6 shown. One of the wire passing part and the adapter 5 is provided with a second sealing groove 13. The second sealing groove 13 is provided with a second sealing member 62 for sealing the adapter 5 and the connecting part. In this embodiment, the second sealing groove 13 is preferably arranged on the wire passing part. A platform structure is machined at the position where the wire passing part is connected to the adapter 5. On the one hand, it is convenient to connect the adapter 5, and on the other hand, it can ensure the sealing effect of the second sealing member 62. The second sealing groove 13 is an annular structure and wraps around the outside of the first wire passing hole 15 and the threaded hole 14, so as to ensure that the second sealing member 62 provides reliable sealing at the connection position between the adapter part and the wire passing part. Please refer to Figures 2-3 and in combination with Figures 10-12 , one of the adapter 5 and the frequency converter housing 4 is provided with a third sealing groove 51. A third sealing member 63 is arranged in the third sealing groove 51 for sealing the adapter 5 and the frequency converter housing 4. In this embodiment, the third sealing groove 51 is arranged on the adapter 5 for easy machining. The third sealing groove 51 is set as an annular structure, and the third sealing member 63 is set as a sealing ring to provide reliable sealing at the connection position between the adapter 5 and the frequency converter housing 4. Optionally, the adapter 5 is provided with a plurality of third sealing grooves 51. The plurality of third sealing grooves 51 are distributed at intervals along the axial direction of the adapter 5. Third sealing members 63 are arranged in all of the plurality of third sealing grooves 51. By arranging a plurality of third sealing grooves 51, the sealing effect between the adapter 5 and the frequency converter housing 4 is further improved. The number of the third sealing grooves 51 can be set to two or three according to requirements. In this embodiment, the third sealing groove 51 is preferably set to two. The adapter 5 is also provided with a reinforcing boss. When the adapter 5 is connected to the wire passing part, as the screw 7 is screwed in, the reinforcing boss gradually presses the second sealing member 62, thereby achieving sealing. By arranging the reinforcing boss, on the premise of meeting the sealing requirements, the weight of the adapter 5 is reduced, which is beneficial to improving the light weight.

[0055] Furthermore, as Figures 7-8 shown and in combination with Figure 2, to ensure the cooling effect on the variable-frequency control board 3, a heat dissipation seat 21 and a mounting seat 23 are provided on the outer shell 2. The mounting seats 23 are provided in multiple numbers and respectively correspond to the corner positions of the variable-frequency control board 3, and the variable-frequency control board 3 is fixedly installed on the mounting seats 23. The heat dissipation seat 21 is provided with a heat dissipation plane, and at least part of the variable-frequency control board 3 is attached to the heat dissipation plane. The heat dissipation seat 21 is preferably arranged in the area with higher heat generation of the variable-frequency control board 3, which can improve the cooling effect and avoid local overheating. The outer shell 2 is also provided with heat dissipation ribs 22, and the heat dissipation ribs 22 include multiple intersecting heat dissipation sub-ribs. The heat dissipation ribs 22 are used to dissipate heat from the variable-frequency control board 3. The heat dissipation ribs 22 can be in contact with the variable-frequency control board 3 or have a gap. By using the heat dissipation ribs 22 to assist in heat dissipation, the cooling effect on the variable-frequency control board 3 can be further improved. Moreover, since the heat dissipation ribs 22 are provided as multiple intersecting heat dissipation sub-ribs, the lightweight level of the outer shell 2 can also be improved to a certain extent.

[0056] Furthermore, as Figures 7-10 shown, a positioning groove 24 is provided on the outer shell 2, and a positioning boss 41 is provided on the frequency converter housing 4. The positioning boss 41 can be inserted into the positioning groove 24 and fit with the groove wall of the positioning groove 24. By setting the positioning groove 24 and the positioning boss 41 to cooperate, the quick positioning of the frequency converter housing 4 and the outer shell 2 can be realized, improving the assembly convenience and installation accuracy.

[0057] Optionally, as Figures 13-15 shown and combined with Figure 2 , for the convenience of maintenance, a frequency converter cover 8 is also provided on the variable-frequency motor in this embodiment. A cover opening 42 is provided on the frequency converter housing 4, and the frequency converter cover 8 is fixedly connected to the frequency converter housing 4 and seals the cover opening 42. A plurality of flanges 81 are provided on the frequency converter cover 8, and a chamfer 811 is provided on one side of the flange 81. When installing the frequency converter cover 8, the chamfer 811 of the flange 81 contacts the inner side wall of the cover opening 42 and aligns the frequency converter cover 8 with the cover opening 42, ensuring the sealing effect on the cover opening 42. Thus, when the variable-frequency control board 3 and / or the three-phase line need to be maintained, only the frequency converter cover 8 needs to be disassembled, further improving the convenience of maintenance.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A variable-frequency motor, comprising a variable-frequency control board (3) and a stator (100), wherein the variable-frequency control board (3) is electrically connected to the stator (100) through three-phase wires, and is characterized in that, It further includes: An inner shell (1) and an outer shell (2), the outer shell (2) is fixedly sleeved outside the inner shell (1), the stator (100) is arranged inside the inner shell (1), a cooling part and a wire passing part are arranged on the outer side of the inner shell (1) along its axial direction, a first wire passing hole (15) is formed in the wire passing part, and the first wire passing hole (15) is used for the three-phase wires to pass through. A coolant tank (12) is arranged in the cooling part, and the tank wall of the coolant tank (12) can form a coolant flow channel with the inner side wall of the outer shell (2). Coolant flows in the coolant flow channel, and the coolant is used to cool the inner shell (1) and the outer shell (2). At least part of the variable frequency control board (3) is attached to the outer side of the outer shell (2); A frequency converter housing (4), the frequency converter housing (4) is covered on the outer shell (2) and is detachably connected to the outer shell (2). The frequency converter housing (4) has an accommodation space, and the variable frequency control board (3) is located in the accommodation space. The first wire passing hole (15) communicates with the accommodation space.

2. The variable-frequency motor according to claim 1, wherein It further includes an adapter (5). The frequency converter housing (4) is provided with a positioning hole (43), at least part of the adapter (5) is matched with the hole wall of the positioning hole (43), the adapter (5) is fixedly connected to the wire passing part, and the adapter (5) is provided with a second wire passing hole (54) for the three-phase wires to pass through. The second wire passing hole (54) communicates with the first wire passing hole (15).

3. The variable-frequency motor according to claim 2, characterized in that, The wire passing part is provided with a threaded hole (14), the adapter (5) is provided with a connection hole (52), the connection hole (52) is set as a waist-shaped hole or an oval hole, and a screw (7) passes through the connection hole (52) and is threadedly connected to the threaded hole (14).

4. The variable frequency motor according to claim 3, wherein One of the cooling part and the outer shell (2) is provided with two first sealing grooves (11), the two first sealing grooves (11) are respectively located at both ends of the coolant tank (12) and are spaced from the coolant tank (12). A first sealing member (61) is arranged in the first sealing groove (11) for sealing the outer shell (2) and the inner shell (1); One of the wire passing part and the adapter (5) is provided with a second sealing groove (13), and a second sealing member (62) is arranged in the second sealing groove (13) for sealing the adapter (5) and the wire passing part; One of the adapter (5) and the frequency converter housing (4) is provided with a third sealing groove (51), and a third sealing member (63) is arranged in the third sealing groove (51) for sealing the adapter (5) and the frequency converter housing (4).

5. The variable-frequency motor according to claim 4, wherein The adapter (5) is provided with a plurality of the third sealing grooves (51), the plurality of third sealing grooves (51) are spaced along the axial direction of the adapter (5), and the third sealing members (63) are arranged in all the plurality of third sealing grooves (51).

6. The variable-frequency motor according to claim 1, characterized in that, The housing (2) is provided with a heat dissipation seat (21) and a mounting seat (23). The variable frequency control board (3) is fixedly mounted on the mounting seat (23). The heat dissipation seat (21) is provided with a heat dissipation plane, and at least part of the variable frequency control board (3) is attached to the heat dissipation plane.

7. The variable-frequency motor according to claim 6, characterized in that, The housing (2) is further provided with heat dissipation ribs (22). The heat dissipation ribs (22) include a plurality of crisscrossed heat dissipation sub-ribs. The heat dissipation ribs (22) are used for dissipating heat from the variable frequency control board (3).

8. The variable-frequency motor according to claim 1, wherein, The housing (2) is provided with a positioning groove (24). The frequency converter housing (4) is provided with a positioning boss (41). The positioning boss (41) can be inserted into the positioning groove (24) and fit with the groove wall of the positioning groove (24).

9. The variable-frequency motor according to claim 1, wherein, It further includes a frequency converter cover plate (8). The frequency converter housing (4) is further provided with a cover plate opening (42). The frequency converter cover plate (8) is fixedly connected to the frequency converter housing (4) and seals the cover plate opening (42).

10. The variable-frequency motor according to any one of claims 1-9, characterized in that, The coolant tank (12) is arranged in a spiral structure. The housing (2) is provided with two coolant connectors (25). The two coolant connectors (25) are respectively communicated with both ends of the coolant flow channel. One of the coolant connectors (25) is used for supplying coolant to the coolant flow channel, and the other coolant connector (25) is used for discharging the coolant in the coolant flow channel.

Images