Motor and compressor

Abstract

The invention provides a motor and a compressor, and the motor comprises a stator core, and a stator tooth part of the stator core is provided with a through channel which longitudinally penetrates through the stator tooth part; the winding coil is longitudinally wound on the stator tooth part; the through pipe comprises a first pipeline and a connecting pipeline which are connected, the first pipeline is limited in the through pipeline, and the connecting pipeline is located between the stator tooth part and the winding coil; and the refrigerant entering the through pipe flows out from the upper end of the through pipe and the connecting pipeline so as to jointly cool the winding coil. By arranging the through pipe with the upper end opening and the lower end opening in the stator core, the refrigerant is guided to the inner side of the winding coil so as to cool the interior of the winding coil, the efficiency and the reliability of the motor are improved, the aging of the coil and an insulating part is delayed, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of compressor cooling, and in particular to a motor and a compressor. Background Art

[0002] The existing motor stator is composed of a stator core and winding coils. The winding coils have resistance, and when the motor is powered on, losses are generated. These losses are converted into heat energy, which increases the motor temperature. When the winding coil temperature is too high, not only will the motor efficiency drop significantly, but it will also accelerate the aging of the coils and insulation, affecting the reliability and service life of the motor.

[0003] In the existing compressor, when the refrigerant is discharged from the pump body and passes through the motor, it can take away part of the heat of the surface coil of the winding coil, so that the temperature of the surface coil is reduced, but it cannot solve the problem of high temperature of the inner coil of the winding.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In response to the problems in the prior art, the present invention provides a motor and a compressor that overcome the difficulties of the prior art. A through pipe with upper and lower openings is arranged inside the stator core to guide the refrigerant to the inner side of the winding coil to cool the inside of the winding coil, thereby improving the efficiency and reliability of the motor, delaying the aging of the coil and insulating parts, and extending the service life of the motor.

[0006] One aspect of an embodiment of the present invention provides a motor, comprising:

[0007] A stator core, wherein the stator teeth of the stator core are provided with a through passage which longitudinally penetrates the stator teeth;

[0008] A winding coil is longitudinally wound around the stator teeth;

[0009] A through pipe, comprising a first pipe and a connecting pipe connected to each other, wherein the first pipe is confined in the through pipe, and the connecting pipe is located between the stator teeth and the winding coil;

[0010] The refrigerant entering the through-tube flows out from the upper end of the through-tube and the connecting pipe to cool the winding coil together.

[0011] In some embodiments, the connecting pipe is located between the stator tooth portion and the lower end of the winding coil, and a spray hole is provided on a pipe wall of one side of the connecting pipe close to the lower end of the winding coil, and a refrigerant is sprayed from the spray hole to cool the lower end of the winding coil;

[0012] Among them, the injection range of the injection holes of the connecting pipe at least partially covers the lower end of the winding coil.

[0013] In some embodiments, the motor further includes:

[0014] A first insulating bracket, located between the upper surface of the stator core and the upper end of the winding coil, having a first insulating tooth portion matching the stator tooth portion, and the winding coil is wound around the stator tooth portion and the first insulating tooth portion.

[0015] In some embodiments, the upper end of the first pipe has an outlet, which is located in the middle inside the upper end of the winding coil, and the refrigerant flowing out of the outlet of the first pipe cools the upper end of the winding coil;

[0016] Among them, the injection range of the injection holes of the connecting pipe for the lower end of the winding coil is half of the length of the lower end of the winding coil.

[0017] In some embodiments, the through pipe further includes a fourth pipe, which is located between the stator tooth portion and the upper end of the winding coil, and the extending direction is parallel to the upper end of the winding coil;

[0018] One end of the fourth pipe is communicated with the upper end of the first pipe, and the other end is closed;

[0019] The pipe wall on the side of the fourth pipe close to the upper end of the winding coil is also provided with injection holes, and the refrigerant sprays out from the injection holes to cool the upper end of the winding coil.

[0020] In some embodiments, the injection range of the injection holes of the connecting pipe completely covers the lower end of the winding coil;

[0021] The injection range of the injection holes of the fourth pipe completely covers the upper end of the winding coil.

[0022] In some embodiments, the first insulating tooth portion has a first through hole, which is matched with the through channel, and the outlet of the first pipe passes through the first through hole.

[0023] In some embodiments, the motor further includes:

[0024] A second insulating bracket, located between the connecting pipe and the lower end of the winding coil, having a second insulating tooth portion matching the stator tooth portion, and the winding coil is wound around the first insulating tooth portion, the stator tooth portion and the second insulating tooth portion;

[0025] Among them, the second insulating tooth portion has a second through hole, and the second through hole is matched with the injection hole of the connecting pipe. The refrigerant ejected from the injection hole passes through the second through hole and flows to the lower end portion of the winding coil.

[0026] In some embodiments, the through pipe further has a second pipe located outside the bottom edge of the stator core. The connecting pipe communicates the first pipe and the second pipe, and the refrigerant flows into the through pipe from the second pipe.

[0027] Among them, the axes of the first pipe and the second pipe are parallel to the central axis of the stator core, and the axis of the connecting pipe is perpendicular to the central axis of the stator core.

[0028] In some embodiments, the stator core includes a plurality of stator punchings. Each punching tooth portion of the stator punching has a through hole. The stator punchings are aligned and stacked according to the position of the through hole and the external shape of the stator punching to form the stator core. A plurality of the through holes together form the through channel, and a plurality of the punching tooth portions together form the stator tooth portion.

[0029] In some embodiments, the through hole is triangular, and the two sides of the through hole close to the punching tooth portion are respectively parallel to the edge of the punching tooth portion to form a first bridging portion and a second bridging portion.

[0030] In some embodiments, the punching tooth portion further includes a main body portion connected to the first bridging portion and the second bridging portion. The first bridging portion, the second bridging portion, and the main body portion satisfy the following relationship: 0.8 ≤ (a + b) / c ≤ 1.2, where a represents the width of the first bridging portion, b represents the width of the second bridging portion, and c represents the width of the main body portion.

[0031] Another aspect of the embodiments of the present invention further provides a compressor, including the above-mentioned motor.

[0032] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present invention will become more apparent.

[0034] Figure 1 A schematic structural diagram of a motor showing an embodiment of the present invention is shown.

[0035] Figure 2 A cross-sectional view parallel to the plane where the stator core is located of the motor according to the first embodiment of the present invention is shown.

[0036] Figure 3 Show Figure 2 Partial enlarged view of the punching sheet tooth part and the winding coil.

[0037] Figure 4 Show Figure 2 Schematic structural diagram of the motor in the middle AA' section.

[0038] Figure 5 Schematic structural diagram of the through pipe according to the first embodiment of the present invention.

[0039] Figure 6 Schematic structural diagram of the connecting pipe of the through pipe according to the first embodiment of the present invention.

[0040] Figure 7 Schematic structural diagram of the first insulating bracket of the motor according to the first embodiment of the present invention.

[0041] Figure 8 Schematic structural diagram of the second insulating bracket of the motor according to the first embodiment of the present invention.

[0042] Figure 9 Schematic structural diagram of the stator punching sheet according to the first embodiment of the present invention.

[0043] Figure 10 Partial enlarged view of the punching sheet tooth part and the winding coil according to the second embodiment of the present invention.

[0044] Figure 11 Show Figure 10 Schematic structural diagram corresponding to the cross-section of the through pipe of the motor.

[0045] Reference numerals:

[0046] 1 Stator core

[0047] 11 Stator punching sheet

[0048] 111 Punching sheet tooth part

[0049] 112 Through hole

[0050] 113 First bridging part

[0051] 114 Second bridging part

[0052] 115 Main body part

[0053] 12 Stator tooth part

[0054] 2 Through channel

[0055] 3 Winding coil

[0056] 31 Upper end part

[0057] 32 Lower end part

[0058] 4 Through pipe

[0059] 41 First pipe

[0060] 42 Second pipe

[0061] 43 Connecting pipe

[0062] 44 Injection hole

[0063] 45 Third pipe

[0064] 5 First insulating bracket

[0065] 51 First insulating tooth part

[0066] 52 First through hole

[0067] 6 Second insulating bracket

[0068] 61 Second insulating tooth part

[0069] 62 Second through hole Detailed implementation manners

[0070] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote the same or similar structures, and thus their repetitive description will be omitted.

[0071] The terms "first", "second", and the like used in the detailed description do not denote any order, quantity, or importance, but are merely used to distinguish different components. In addition, in the description of this invention, the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for convenience of description and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this invention.

[0072] It should be noted that, without conflict, the features in the embodiments of this invention and those in different embodiments can be combined with each other.

[0073] Through careful and in-depth research, the applicant of this case has overcome the difficulties of the prior art and provided a solution. The present invention provides a motor and a compressor, wherein the motor at least includes: a stator core, and a through-channel longitudinally penetrating the stator teeth of the stator core is formed in the stator teeth of the stator core; a winding coil longitudinally wound around the stator teeth; a through-tube including a first tube and a connecting tube connected to each other, the first tube is limited in the through-channel, and the connecting tube is located between the stator teeth and the winding coil; wherein, the refrigerant entering the through-tube flows out from the upper end and the connecting tube of the through-tube to jointly cool the winding coil. By arranging a through-tube with openings at the upper end and the lower end inside the stator core, the present invention diverts the refrigerant to the inner side of the winding coil to cool the inside of the winding coil 3, improves the efficiency and reliability of the motor, delays the aging of the coil and the insulating member, and extends the service life of the motor.

[0074] The following further elaborates on the specific embodiments of the present invention with reference to the accompanying drawings.

[0075] Figure 1 The structural schematic diagram of a motor showing an embodiment of the present invention is presented. Figure 2 The sectional view parallel to the plane where the stator core is located of the motor in the first embodiment of the present invention is shown. Figure 3 Shown Figure 2 The partial enlarged view of the punched sheet teeth and the winding coil is presented. Figure 4 Shown Figure 2 The structural schematic diagram of the motor in the AA' cross-section is presented. As Figures 1 to 4 shown, the first embodiment of the present invention provides a motor, which at least includes: a stator core 1, a through-channel 2, a winding coil 3, and a through-tube 4.

[0076] In this embodiment, at least one through-channel 2 longitudinally penetrating the stator teeth 12 is formed on at least one stator tooth 12 of the stator core 1. Preferably, at least one through-channel 2 longitudinally penetrating the stator teeth 12 is formed on each stator tooth 12 of the stator core 1. The more the number of through-channels 2 formed on each stator tooth 12, the better the cooling effect on the upper end portion 31 and the lower end portion 32 inside the winding coil 3.

[0077] In this embodiment, the winding coil 3 is longitudinally wound around the stator teeth 12. The winding coil 3 is divided into three parts: an upper end portion 31, an in-slot winding, and a lower end portion 32. The present invention mainly focuses on the upper end portion 31 and the lower end portion 32 of the winding coil 3. The through-channel 2 is arranged inside the winding coil 3 to facilitate the cooling of the inside of the winding coil 3. The through-channel 2 is preferably arranged parallel to the axis direction of the stator core 1 to simplify the preparation of the stator core 1. The through-channel 2 can also be arranged obliquely as long as it is arranged inside the winding coil 3.

[0078] Figure 5Schematic structural diagram of the through pipe showing the first embodiment of the present invention. Figure 6 Schematic structural diagram of the connecting pipe of the through pipe showing the first embodiment of the present invention. In this embodiment, as Figures 1 to 6 shown, the through pipe 4 includes a first pipe 41, a second pipe 42, and a connecting pipe 43 connecting the two. The material of the through pipe 4 can be polybutylene terephthalate, but is not limited thereto.

[0079] The first pipe 41 is limited within the through passage 2. An outlet is provided at its upper end, and the upper end outlet and the part connected to the connecting pipe 43 at its lower end are exposed from the through passage 2. The outlet of the first pipe 41 is located in the middle inside the upper end portion 31 of the winding coil 3. The refrigerant flowing out from the outlet of the first pipe 41 cools the inside of the upper end portion 31 of the winding coil 3. The projection of the outlet of the first pipe 41 based on the stator core 1 is included in the projection of the upper end portion 31 of the winding coil 3 based on the stator core 1 to specifically limit the position of the upper end outlet of the first pipe 41. Preferably, the outlet of the first pipe 41 is located in the middle inside the upper end portion 31 of the winding coil 3 to achieve the best cooling effect of evenly cooling the left and right sides inside the upper end portion 31 of the winding coil 3. In some other embodiments, multiple first pipes 41 can be provided in one through passage 2 to increase the flow rate of the refrigerant and further improve the cooling effect on the upper end portion 31 of the winding coil 3.

[0080] The connecting pipe 43 is located between the stator tooth portion 12 and the lower end portion 32 of the winding coil 3, that is, the winding coil 3 is longitudinally wound around the lower end portion 32 of the stator tooth portion 12 and the connecting pipe 43. Among them, a spray hole 44 is provided on the pipe wall of the connecting pipe 43 close to the lower end portion 32 of the winding coil 3, and the refrigerant sprays out from the spray hole 44 to cool the inside of the lower end portion 32 of the winding coil 3. Further, when the through passage 2 is vertically arranged, the spraying range of the spray hole 44 on the lower end portion 32 of the winding coil 3 is half of the length of the lower end portion 32 of the winding coil 3. When the through passage 2 is inclined inward from top to bottom, the spraying range of the spray hole 44 on the lower end portion 32 of the winding coil 3 can also exceed half or even completely cover it to achieve a better cooling effect on the lower end portion 32 of the winding coil 3. Furthermore, when multiple first pipes 41 are provided in one through passage 2, there are multiple rows of spray holes 44 for cooling the lower end portion 32 of one winding coil 3, further improving the cooling effect.

[0081] The second pipe 42 is located outside the bottom edge of the stator core 1. The refrigerant flows into the through pipe 4 from the second pipe 42, and then sprays out from the spray holes 44 of the connecting pipe 43, and also flows out from the upper end outlet of the first pipe 41. The second pipe 42 is also located outside the winding coil 3. The position of the second pipe 42 is only set to suck the refrigerant from the high-pressure part of the refrigerant into the through pipe 4 for cooling the winding coil 3. Preferably, the axis of the second pipe 42 is located on the symmetry plane of the stator tooth part 12. In some preferred embodiments, the axes of the first pipe 41 and the second pipe 42 are parallel to the central axis of the stator core 1, but not limited thereto. The axis of the connecting pipe 43 is perpendicular to the central axis of the stator core 1, that is, parallel to the lower surface of the stator core 1. Preferably, the axis of the connecting pipe 43 is also parallel to the extending direction of the lower end part 32 of the winding coil 3 to achieve a uniform heat dissipation effect on the lower end part 32. In addition, the distance between the axis of the first pipe 41 and the central axis of the stator core 1 is less than the distance between the axis of the second pipe 42 and the central axis of the stator core 1.

[0082] Figure 7 Schematic diagram showing the structure of the first insulation bracket of the motor according to the first embodiment of the present invention. In this embodiment, as Figure 7 shown, the motor further includes: a first insulation bracket 5. The first insulation bracket 5 has a first insulation tooth part 51 matching the stator tooth part 12, and the winding coil 3 is wound around the stator tooth part 12 and the first insulation tooth part 51, that is, both the stator tooth part 12 and the first insulation tooth part 51 are located inside the winding coil 3. The first insulation tooth part 51 has a first through hole 52, and the first through hole 52 matches the position of the through channel 2 so that the upper end outlet of the first pipe 41 passes through the first through hole 52, and then cools the upper end part 31 of the winding coil 3. The cross-sectional shapes of the first through hole 52 and the through channel 2 are matched, specifically, they are the same in size and shape, but not limited thereto, as long as the upper end outlet of the first pipe 41 can pass through the first through hole 52.

[0083] Figure 8 Schematic diagram showing the structure of the second insulation bracket of the motor according to the first embodiment of the present invention. In this embodiment, as Figure 8As shown, the motor further includes: a second insulating bracket 6. The second insulating bracket 6 has a second insulating tooth portion 61 that matches the stator tooth portion 12. The winding coil 3 is wound around the first insulating tooth portion 51, the stator tooth portion 12, and the second insulating tooth portion 61, that is, the first insulating tooth portion 51, the stator tooth portion 12, and the second insulating tooth portion 61 are all located inside the winding coil 3. The second insulating tooth portion 61 is located between the connecting pipe 43 and the lower end portion 32 of the winding coil 3. That is, from top to bottom, the component structure at the lower end of the motor is in sequence: the lower surface of the stator core 1, the connecting pipe 43, the second insulating bracket 6, and the lower end portion 32 of the winding coil 3. The second insulating tooth portion 61 has a second through hole 62, and the position of the second through hole 62 matches the position of the injection hole 44, so that the refrigerant ejected from the injection hole 44 passes through the second through hole 62 and flows to the lower end portion 32 of the winding coil 3. Preferably, all the injection holes 44 are located within the projection of the second through hole 62 based on the lower surface of the stator core 1 based on the projection of the lower surface of the stator core 1, so as to achieve the best cooling effect on the lower end portion 32 of the winding coil 3. In addition, the second pipe 42 is distributed on the outer side surface of the second insulating bracket 6 to suck the refrigerant from the high-pressure refrigerant place into the through pipe 4 for cooling the winding coil 3.

[0084] Figure 9 The structural schematic diagram of the stator punch of the first embodiment of the present invention is shown. In this embodiment, as Figure 9 shown, the stator core 1 includes a plurality of stator punch sheets 11, and a plurality of punch tooth portions 111 together form the stator tooth portion 12. Each punch tooth portion 111 of the stator punch sheet 11 has a through hole 112. The stator punch sheets 11 are aligned and stacked according to the position of the through hole 112 and the outer shape of the stator punch sheet 11 to form the stator core 1. A plurality of through holes 112 together form a through channel 2, and the outer shape of the stator punch sheet 11 is regular. When the axis of the through channel 2 is parallel to the axis of the stator core 1, each stator punch sheet 11 can have the same structure. If the through channel 2 has a certain inclination, the positions of the through holes 112 of each stator punch sheet 11 are different to form an inclined through channel 2. In some other embodiments, the stator core 1 can also be prepared by molding injection or 3D printing, as long as the through channel 2 is formed.

[0085] In this embodiment, continue to refer to Figure 9, the through hole 112 is triangular or rounded triangular. The two sides of the through hole 112 close to the punching tooth part 111 are respectively parallel to the edge of the punching tooth part 111 to form a first bridging part 113 and a second bridging part 114. The punching tooth part 111 further includes a main body part 115 connected to the first bridging part 113 and the second bridging part 114. That is, a part of the edge of the stator slot close to the through hole 112 is bent towards the center of the stator slot, that is, the first bridging part 113 and the second bridging part 114, to form a non-parallel punching tooth part 111 structure relative to the winding coil 3. Combining with the main body part 115 parallel to the winding coil 3, that is, the parallel punching tooth part 111 structure, the whole stator slot is a structure of non-parallel tooth part plus parallel tooth part, thereby forming a bent stator slot to avoid affecting the magnetic circuit conduction of the winding coil 3. Preferably, the through hole 112 is an isosceles triangle, and the punching tooth part 111 is symmetrically arranged about the height line of the bottom edge of the through hole 112 so that the punching tooth part 111 is a symmetric structure.

[0086] In this embodiment, continue to refer to Figure 9 , the first bridging part 113, the second bridging part 114 and the main body part 115 satisfy the following relationship: 0.8 ≤ (a + b) / c ≤ 1.2, where a represents the width of the first bridging part 113, b represents the width of the second bridging part 114, and c represents the width of the main body part 115. Such a setting of the widths of the first bridging part 113, the second bridging part 114 and the main body part 115 is used to achieve the best balance among the cross-sectional area of the through channel 2, that is, the cooling effect, the strength of the stator core 1 and the magnetic circuit conduction of the winding coil 3. In some other embodiments, the through hole 112 can also be of other shapes, which is not limited thereto.

[0087] Figure 10 A partial enlarged view of the punching tooth part and the winding coil showing the second embodiment of the present invention. Figure 11 Show Figure 10 A schematic structural diagram of the cross-section of the through pipe corresponding to the motor. As Figure 1 , 9 and 10 show, the motor of the second embodiment of the present invention has the following differences from the first embodiment:

[0088] First, the through pipe 4 further includes a fourth pipe 45. The fourth pipe 45 is located between the stator tooth portion 12 and the upper end portion 31 of the winding coil 3, and its extending direction is parallel to the upper end portion 31 of the winding coil 3. One end of the fourth pipe 45 is communicated with the upper end of the first pipe 41, and the other end is closed. Injection holes 44 are also formed in the pipe wall on the side of the fourth pipe 45 close to the upper end portion 31 of the winding coil 3. The design with the other end closed enables the refrigerant to be ejected only from the injection holes 44 to cool the upper end portion 31 of the winding coil 3. Compared with the first embodiment, this embodiment improves the refrigerant injection range for the upper end portion 31 of the winding coil 3 and enhances the cooling effect on the upper end portion 31 of the winding coil 3. At the same time, since the through channel 2 is closer to the inner edge of the stator tooth portion 12, the injection range of the injection holes 44 of the connecting pipe 43 can completely cover the lower end portion 32 of the winding coil 3, and the injection range of the injection holes 44 of the fourth pipe 45 can also completely cover the upper end portion 31 of the winding coil 3, greatly enhancing the cooling effect on the winding coil 3.

[0089] Second, the first insulating tooth portion 51 does not need to be provided with a first through hole 52. In this embodiment, since there is no outlet provided at the upper end of the first pipe 41 but it is communicated with one end of the fourth pipe 45, the first insulating bracket 5 does not need to be provided with a corresponding first through hole 52.

[0090] For the motor of the second embodiment of the present invention, other aspects can be the same as those of the first embodiment, and the repeated parts will not be elaborated here.

[0091] For the motor of the present invention, by arranging a through pipe 4 with upper and lower openings inside the stator core 1, the refrigerant is diverted to the inner side of the winding coil 3 to cool the inside of the winding coil 3, improve the motor efficiency and reliability, delay the aging of the coil and the insulating part, and extend the service life of the motor.

[0092] Based on the same inventive concept, another aspect of the embodiment of the present invention further provides a compressor, including the above-mentioned motor. The related technical features and technical effects are as described above and will not be elaborated here.

[0093] In summary, for the motor and the compressor of the present invention, by arranging a through pipe with upper and lower openings inside the stator core, the refrigerant is diverted to the inner side of the winding coil to cool the inside of the winding coil, improve the motor efficiency and reliability, delay the aging of the coil and the insulating part, and extend the service life of the motor.

[0094] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the inventive concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A motor, characterized in that, Comprising: A stator core (1), in which a through-channel (2) longitudinally penetrating the stator tooth portion (12) is provided in the stator tooth portion (12) of the stator core (1); A winding coil (3), longitudinally wound around the stator tooth portion (12); A through pipe (4), including a connected first pipe (41) and a connecting pipe (43), the first pipe (41) is limited in the through-channel (2), and the connecting pipe (43) is located between the stator tooth portion (12) and the winding coil (3); Wherein, the refrigerant entering the through pipe (4) flows out from the upper end of the through pipe (4) and the connecting pipe (43) to jointly cool the interior of the winding coil (3).

2. The motor according to claim 1, characterized in that The connecting pipe (43) is located between the stator tooth portion (12) and the lower end portion (32) of the winding coil (3), and a spray hole (44) is provided on one side wall of the connecting pipe (43) close to the lower end portion (32) of the winding coil (3), and the refrigerant sprays out from the spray hole (44) to cool the lower end portion (32) of the winding coil (3); Wherein, the spraying range of the spray hole (44) of the connecting pipe (43) at least partially covers the lower end portion (32) of the winding coil (3).

3. The motor according to claim 2, characterized in that, The motor further includes: A first insulating bracket (5), located between the upper surface of the stator core (1) and the upper end portion (31) of the winding coil (3), having a first insulating tooth portion (51) matching the stator tooth portion (12), and the winding coil (3) is wound around the stator tooth portion (12) and the first insulating tooth portion (51).

4. The motor according to claim 3, characterized in that The upper end of the first pipe (41) has an outlet, located at the middle inside of the upper end portion (31) of the winding coil (3), and the refrigerant flowing out from the outlet of the first pipe (41) cools the upper end portion (31) of the winding coil (3); Wherein, the spraying range of the spray hole (44) of the connecting pipe (43) on the lower end portion (32) of the winding coil (3) is half of the length of the lower end portion (32) of the winding coil (3).

5. The motor according to claim 3, characterized in that The through pipe (4) further includes a fourth pipe (45), located between the stator tooth portion (12) and the upper end portion (31) of the winding coil (3), and the extending direction is parallel to the upper end portion (31) of the winding coil (3); One end of the fourth pipe (45) is communicated with the upper end of the first pipe (41), and the other end is closed; A spray hole (44) is also provided on one side wall of the fourth pipe (45) close to the upper end portion (31) of the winding coil (3), and the refrigerant sprays out from the spray hole (44) to cool the upper end portion (31) of the winding coil (3).

6. The motor according to claim 5, characterized in that The spraying range of the spray hole (44) of the connecting pipe (43) completely covers the lower end portion (32) of the winding coil (3); The injection range of the injection holes (44) of the fourth pipe (45) completely covers the upper end portion (31) of the winding coil (3).

7. The motor according to claim 4, wherein the first insulating tooth portion (51) has a first through hole (52), the first through hole (52) is matched with the through channel (2), and the outlet of the first pipe (41) passes through the first through hole (52).

8. The motor according to claim 3, wherein, The motor further comprises: a second insulating bracket (6), located between the connecting pipe (43) and the lower end portion (32) of the winding coil (3), having a second insulating tooth portion (61) matched with the stator tooth portion (12), and the winding coil (3) is wound around the first insulating tooth portion (51), the stator tooth portion (12) and the second insulating tooth portion (61); wherein, the second insulating tooth portion (61) has a second through hole (62), the second through hole (62) is matched with the injection hole (44) of the connecting pipe (43), and the refrigerant ejected from the injection hole (44) passes through the second through hole (62) and flows to the lower end portion (32) of the winding coil (3).

9. The motor according to claim 1, wherein the through pipe (4) further has a second pipe (42) located outside the bottom edge of the stator core (1), the connecting pipe (43) communicates the first pipe (41) and the second pipe (42), and the refrigerant flows into the through pipe (4) from the second pipe (42); wherein, the axes of the first pipe (41) and the second pipe (42) are parallel to the central axis of the stator core (1), and the axis of the connecting pipe (43) is perpendicular to the central axis of the stator core (1).

10. The motor according to claim 1, wherein the stator core (1) comprises a plurality of stator punching sheets (11), each punching tooth portion (111) of the stator punching sheet (11) has a through hole (112), the stator punching sheets (11) are aligned and stacked according to the positions of the through holes (112) and the outer shapes of the stator punching sheets (11) to form the stator core (1), a plurality of the through holes (112) together form the through channel (2), and a plurality of the punching tooth portions (111) together form the stator tooth portion (12).

11. The motor according to claim 10, wherein the through hole (112) is triangular, and two sides of the through hole (112) close to the punching tooth portion (111) are respectively parallel to the edge of the punching tooth portion (111) to form a first bridging portion (113) and a second bridging portion (114).

12. The motor according to claim 11, wherein The punching sheet tooth part (111) further includes a main body part (115) connected to the first bridging part (113) and the second bridging part (114), and the first bridging part (113), the second bridging part (114) and the main body part (115) satisfy the following relationship: 0.8 ≤ (a + b) / c ≤ 1.2, where a represents the width of the first bridging part (113), b represents the width of the second bridging part (114), and c represents the width of the main body part (115).

13. A compressor, characterized in that, An electric motor comprising the electric motor according to any one of claims 1 to 12.

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