Motor, compressor and air conditioner

Abstract

The utility model relates to a motor, a compressor and an air conditioner, the motor comprises a casing, a stator core and a cooling jacket, and the stator core is accommodated in the casing; the cooling sleeve is sleeved on the stator iron core; in the radial direction of the stator core, the cooling sleeve is in clearance fit with the machine shell, the cooling sleeve is in clearance fit with the stator core, and a positioning hole is defined by the inner circumferential wall of the cooling sleeve and the outer circumferential wall of the stator core. According to the bearing, the cooling sleeve is arranged on the stator iron core in a sleeving mode, the positioning hole is defined by the inner circumferential wall of the cooling sleeve and the outer circumferential wall of the stator iron core, and the positioning hole can play a positioning role in the bearing installation process; the cooling sleeve is in clearance fit with the casing and the stator iron core, so that the casing, the cooling sleeve and the stator iron core can be assembled at normal temperature, and the situation that the position degree of a positioning hole is changed due to deformation of the cooling sleeve and the stator iron core in the hot charging process, so that the position degree of a bearing is changed, and the service life of the bearing is prolonged is avoided. And the phenomenon that the main shaft and the bearing are locked in the operation process of the motor is inhibited.

Description

Technical Field

[0001] This application relates to the field of air conditioning, and more particularly to an electric motor, a compressor, and an air conditioner. Background Technology

[0002] In recent years, with rising energy costs and stricter environmental protection requirements, energy conservation and environmental protection have become crucial issues that cannot be ignored. Steam compressors, due to their high efficiency, energy saving, and environmental friendliness, have been widely used in industry. Currently, steam compressors in China are widely used in salt production, environmental protection, distillation, food processing, pharmaceuticals, and drying industries. Steam compressors on the market are mainly divided into screw, torsion vane Roots, and centrifugal types. Screw steam compressors have good stability and high pressure ratio, but their volumetric flow rate is limited, making them suitable for systems with small flow rates and high pressure ratios. Roots compressors have low vibration and simple structure, but their pressure ratio and flow rate are relatively small, often used in systems with small to medium cooling capacity and large temperature rise. Centrifugal steam compressors, while having a large volumetric flow rate, have a small single-stage pressure ratio, resulting in significant temperature rise issues.

[0003] In related technologies, for steam compressors, the positional accuracy of the primary and secondary bearing supports is determined by drilling pin holes after boring, and the pins are used to ensure that the positional accuracy of the primary and secondary bearing supports is qualified. However, conventional cylinder and motor assembly methods are achieved through heat fitting. During the heating process of the cylinder, the cylinder is prone to deformation, which leads to changes in the positional accuracy of the pin holes on the cylinder, and consequently changes in the positional accuracy of the primary and secondary bearing supports. This can cause phenomena such as the main shaft and bearings seizing during compressor operation. Utility Model Content

[0004] The purpose of this application is to provide a motor, compressor, and air conditioner to solve the problem in related technologies where the bearing position is prone to change, leading to the seizing of the spindle and bearing.

[0005] To achieve the objectives of this application, the following technical solution is provided:

[0006] In a first aspect, this application provides an electric motor, comprising:

[0007] chassis;

[0008] The stator core is housed within the housing;

[0009] A cooling jacket is fitted onto the stator core;

[0010] In the radial direction of the stator core, the cooling sleeve is in clearance fit with the housing, and the cooling sleeve is in clearance fit with the stator core. The inner peripheral wall of the cooling sleeve and the outer peripheral wall of the stator core form a positioning hole.

[0011] In conjunction with the first aspect, in one possible implementation, a first gap is provided between the radially inner peripheral wall of the cooling sleeve and the radially outer peripheral wall of the stator core, a first groove is provided on the radially inner peripheral wall of the cooling sleeve, and a second groove is provided on the radially outer peripheral wall of the stator core, the first gap, the first groove and the second groove forming the positioning hole.

[0012] In conjunction with the first aspect, in one possible implementation, a bearing mounting position is provided inside the housing, the bearing mounting position is located on one side of the stator core along the axial direction, and the positioning hole is provided at one end of the stator core along the axial direction near the bearing mounting position.

[0013] In conjunction with the first aspect, in one possible implementation, the housing is provided with an inlet and an outlet, a second gap is formed between the outer peripheral wall of the cooling jacket along the radial direction and the inner wall of the housing, the cooling jacket is provided with a cooling groove, the cooling groove and the second gap form a cooling channel, and the cooling channel communicates with the inlet and the outlet.

[0014] In conjunction with the first aspect, in one possible implementation, the cooling tank is arranged in a spiral shape, the liquid inlet is located at one end of the extending direction of the cooling tank, and the liquid outlet is located at the other end of the extending direction of the cooling tank.

[0015] In conjunction with the first aspect, in one possible implementation, the liquid inlet and the liquid outlet are located on opposite sides of the cooling jacket along the radial direction.

[0016] In conjunction with the first aspect, in one possible implementation, the motor further includes a pin inserted into the positioning hole, the pin abutting against the cooling sleeve and the stator core in the radial direction of the stator core.

[0017] In conjunction with the first aspect, in one possible implementation, the motor further includes a gasket, which is connected between the end of the cooling jacket away from the positioning hole and the housing in the axial direction of the stator core.

[0018] In conjunction with the first aspect, in one possible implementation, the motor further includes a sealing ring, and the cooling sleeve has a third groove on its radially outer peripheral wall, the third groove being arranged along the axial direction of the cooling sleeve, the sealing ring being disposed in the third groove, and the sealing ring abutting against the inner wall of the housing.

[0019] In conjunction with the first aspect, in one possible implementation, the motor further includes a baffle, one axial end of the stator core abuts against the cooling sleeve, the baffle abuts against the other axial end of the stator core and the cooling sleeve, and the baffle is provided with a through hole communicating with the positioning hole.

[0020] Secondly, this application also provides a compressor including a motor as described in any of the various implementations of the first aspect.

[0021] Thirdly, this application also provides an air conditioner, including a compressor as described in the second aspect.

[0022] The technical solutions provided in this application have the following advantages compared with the prior art:

[0023] The motor provided in this application has a cooling jacket fitted onto the stator core. The inner circumferential wall of the cooling jacket and the outer circumferential wall of the stator core form a positioning hole, which can play a positioning role during bearing installation. The cooling jacket maintains a clearance fit with the housing and the stator core, which allows the housing, cooling jacket, and stator core to be assembled at room temperature. This avoids changes in the position of the positioning hole due to deformation of the cooling jacket and stator core during hot assembly, which in turn causes changes in the position of the bearing. This suppresses phenomena such as spindle and bearing seizure during motor operation. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0027] Figure 1 This is a cross-sectional view of an electric motor according to one embodiment of this application;

[0028] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0029] Figure 3 for Figure 1 A magnified view of a section at point B in the middle;

[0030] Figure 4 This is a partial structural cross-sectional view of the stator core and cooling jacket.

[0031] Figure 5 This is the front view of the cooling jacket;

[0032] Figure 6 for Figure 1 A magnified view of a section at point C;

[0033] Figure 7 for Figure 1 A magnified view of a section at point D.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Housing; 110. Bearing mounting position; 120. Liquid inlet; 130. Liquid outlet; 140. Second clearance;

[0036] 200. Stator core; 210. Second groove;

[0037] 300, Cooling jacket; 310, First gap; 320, First groove; 330, Cooling groove; 340, Third groove;

[0038] 400. Stator winding;

[0039] 500, positioning hole;

[0040] 600, pins;

[0041] 700, gasket;

[0042] 800, sealing ring;

[0043] 900, baffle; 910, through hole. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0046] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0047] An air conditioner is an air conditioner that regulates and controls the temperature and humidity of indoor or vehicle interior air. It generally consists of a main unit, water pump, fan, and piping system. The cooling principle of air conditioning largely utilizes the heat absorption during liquid vaporization and the heat release during condensation. The heating principle involves a compressor drawing in low-pressure gas, compressing it into high-temperature, high-pressure gas, thereby achieving a heating effect.

[0048] In recent years, with rising energy costs and stricter environmental protection requirements, energy conservation and environmental protection have become crucial issues that cannot be ignored. Steam compressors, due to their high efficiency, energy saving, and environmental friendliness, have been widely used in industry. Currently, steam compressors in China are widely used in salt production, environmental protection, distillation, food processing, pharmaceuticals, and drying industries. Steam compressors on the market are mainly divided into screw, torsion vane Roots, and centrifugal types. Screw steam compressors have good stability and high pressure ratio, but their volumetric flow rate is limited, making them suitable for systems with small flow rates and high pressure ratios. Roots compressors have low vibration and simple structure, but their pressure ratio and flow rate are relatively small, often used in systems with small to medium cooling capacity and large temperature rise. Centrifugal steam compressors, while having a large volumetric flow rate, have a small single-stage pressure ratio, resulting in significant temperature rise issues.

[0049] The working principle of a steam compressor air conditioner is based on a vapor compression refrigeration cycle. In this process, water vapor, as the refrigerant, is compressed into high-temperature, high-pressure vapor in the compressor, and then cooled and condensed into liquid by the condenser. Subsequently, the liquid refrigerant is throttled and depressurized through the expansion valve and enters the evaporator, where it absorbs heat from the indoor air and vaporizes, thereby achieving cooling. Finally, the low-temperature, low-pressure refrigerant vapor is drawn back into the compressor to begin the next cycle.

[0050] In related technologies, for steam compressors, the positional accuracy of the primary and secondary bearing supports is determined by drilling pin holes after boring, and the pins are used to ensure that the positional accuracy of the primary and secondary bearing supports is qualified. However, conventional cylinder and motor assembly methods are achieved through heat fitting. During the heating process of the cylinder, the cylinder is prone to deformation, which leads to changes in the positional accuracy of the pin holes on the cylinder, and consequently changes in the positional accuracy of the primary and secondary bearing supports. This can cause phenomena such as the main shaft and bearings seizing during compressor operation.

[0051] refer to Figure 1 , Figure 2 and Figure 3 This application provides an electric motor, including a housing 100, a stator core 200, and a cooling jacket 300.

[0052] The housing 100 is the external protective structure of the motor, providing protection for the coils, bearings, and other critical components inside the motor from damage by moisture, abrasive particles, and mechanical materials. Furthermore, the housing 100 protects other equipment and personnel from the high temperatures and heat generated by the motor. Simultaneously, the housing 100 is crucial for ensuring efficient cooling of the AC motor; motors operating in overheated conditions or in environments exceeding the recommended operating temperature will exhibit poor performance and shortened lifespan.

[0053] The stator core 200 is housed within the casing 100. The stator core 200 is a crucial component of the motor's magnetic circuit, forming, together with the rotor core, the air gap between the stator and rotor, the complete magnetic circuit of the motor. The stator core 200 is constructed from laminations and various fasteners. These laminations are typically made of silicon steel sheets, possessing excellent magnetic permeability and low-loss characteristics. The stator core 200 also houses the stator windings 400. During generator operation, the core is subjected to a combination of mechanical forces, thermal stress, and electromagnetic forces.

[0054] The cooling jacket 300 is fitted onto the stator core 200, that is, the cooling jacket 300 is located between the stator core 200 and the housing 100. The cooling jacket 300 is an important component for heat dissipation in the motor. It removes the heat generated by the motor by circulating a cooling medium (such as water or air) to ensure that the motor operates at a suitable temperature.

[0055] In the radial direction of the stator core 200, the cooling sleeve 300 is in clearance fit with the housing 100, and the cooling sleeve 300 is in clearance fit with the stator core 200. The inner peripheral wall of the cooling sleeve 300 and the outer peripheral wall of the stator core 200 form a positioning hole 500.

[0056] The motor provided in this application is fitted onto the stator core 200 with a cooling sleeve 300. The inner circumferential wall of the cooling sleeve 300 and the outer circumferential wall of the stator core 200 form a positioning hole 500, which can play a positioning role during bearing installation. The cooling sleeve 300, the housing 100, and the stator core 200 are all in clearance fit, which allows the housing 100, the cooling sleeve 300, and the stator core 200 to be assembled at room temperature. This avoids the deformation of the cooling sleeve 300 and the stator core 200 during hot assembly, which would cause changes in the position of the positioning hole 500 and thus the position of the bearing. This suppresses phenomena such as spindle and bearing seizure during motor operation.

[0057] refer to Figure 1 , Figure 2 and Figure 4 A first gap 310 exists between the inner radial wall of the cooling sleeve 300 and the outer radial wall of the stator core 200. A first groove 320 is provided on the inner radial wall of the cooling sleeve 300, and a second groove 210 is provided on the outer radial wall of the stator core 200. The first gap 310, the first groove 320, and the second groove 210 form a positioning hole 500. Specifically, the first gap 310 is provided to facilitate the fitting of the cooling sleeve 300 onto the stator core 200, allowing the cooling sleeve 300 and the stator core 200 to be assembled at room temperature, reducing assembly difficulty. The first groove 320 and the second groove 210 correspond to each other and, together with the first gap 310, form the positioning hole 500. The positioning hole 500 can serve as a positioning reference during motor assembly, facilitating the installation and adjustment of other motor components, such as bearings and fans, thereby improving the overall assembly accuracy and stability of the motor.

[0058] In one embodiment, the compressor provided in this application is a steam compressor. The compressor also includes a primary bearing (not shown), a secondary bearing (not shown), and an impeller (not shown). A motor rotor (not shown) is installed inside the stator core 200. The primary bearing and the secondary bearing are both sleeved on the motor rotor. The primary bearing and the secondary bearing are located on opposite sides of the stator core 200 along the axial direction. The impeller is connected to one end of the motor rotor. The motor rotor drives the impeller to rotate, thereby driving airflow.

[0059] The primary and secondary bearings support the motor rotor. A bearing mounting position 110 is provided within the housing 100, located on one axial side of the stator core 200. A positioning hole 500 is located at the axial end of the stator core 200 near the bearing mounting position 110. The primary or secondary bearing is installed through the bearing mounting position 110, ensuring its secure installation within the motor. The positioning hole 500 is positioned as close as possible to the bearing mounting position 110 to further improve the positioning accuracy of the bearing installation.

[0060] refer to Figure 1 , Figure 3 and Figure 5 The housing 100 is provided with a liquid inlet 120 and a liquid outlet 130. A second gap 140 exists between the radially outer peripheral wall of the cooling jacket 300 and the inner wall of the housing 100. The cooling jacket 300 is provided with a cooling groove 330, which, together with the second gap 140, forms a cooling channel that communicates with the liquid inlet 120 and the liquid outlet 130. Through the design of the liquid inlet 120 and the liquid outlet 130, the coolant can form a continuous circulation flow inside the motor. This flow pattern ensures that the coolant can fully contact and remove heat from inside the motor, thereby improving cooling efficiency. The second gap 140 between the cooling groove 330 on the cooling jacket 300 and the inner wall of the housing 100 forms a cooling channel. This design increases the flow area of ​​the coolant, allowing more coolant to participate in the cooling process simultaneously, further improving cooling efficiency.

[0061] In one embodiment, the cooling tank 330 is arranged in a spiral shape, with the inlet 120 located at one end of the extending direction of the cooling tank 330 and the outlet 130 located at the other end of the extending direction of the cooling tank 330. The spiral design of the cooling tank 330 allows for a longer flow path of the coolant inside the motor, thereby increasing the contact area between the coolant and the heat inside the motor. Furthermore, positioning the inlet 120 and outlet 130 at opposite ends of the extending direction of the cooling tank 330 enables a more uniform flow of coolant inside the motor, improving the motor's cooling efficiency and heat dissipation performance.

[0062] The inlet 120 and outlet 130 are located on opposite radial sides of the cooling jacket 300, allowing for smoother coolant flow within the jacket and reducing pressure loss caused by abrupt changes in flow direction. This improves coolant flow efficiency and enhances cooling performance. After entering the cooling jacket 300 from one side, the coolant passes through spiral or other shaped cooling channels 330 and exits from the other side. This flow path ensures that the coolant evenly covers the entire cooling jacket 300.

[0063] In actual use, the inlet 120 is located above the housing 100, and the outlet 130 is located below the housing 100, which allows the coolant to flow more smoothly, helps to reduce the flow resistance of the coolant inside the motor, and improves the cooling efficiency.

[0064] Continue to refer to Figure 1 , Figure 2 and Figure 4 The motor also includes a pin 600, which is inserted into a positioning hole 500. In the radial direction of the stator core 200, the pin 600 abuts against the cooling sleeve 300 and the stator core 200. By inserting into the positioning hole 500, the pin 600 can precisely fix the position of key components such as the stator core 200 and the cooling sleeve 300. Simultaneously, in the radial direction of the stator core 200, the pin 600 can restrict radial movement between the stator core 200 and the cooling sleeve 300, and can also restrict relative rotation between the stator core 200 and the cooling sleeve 300.

[0065] Optionally, multiple positioning holes 500 are provided, and the multiple positioning holes 500 are arranged around the circumference of the stator core 200. Multiple pins 600 are provided, and the multiple pins 600 are provided in a one-to-one correspondence with the multiple positioning holes 500, so as to further improve the stability between the stator core 200 and the cooling jacket 300.

[0066] refer to Figure 1 , Figure 2 , Figure 6 and Figure 7 The motor also includes a gasket 700, which is connected between the end of the cooling jacket 300 away from the positioning hole 500 and the housing 100 along the axial direction of the stator core 200. Specifically, the gasket 700 is installed on the inner wall of the housing 100 by fasteners such as screws and bolts. The presence of the gasket 700 can effectively fill the gap between the cooling jacket 300 and the housing 100, preventing coolant or other liquids from leaking during motor operation.

[0067] The motor also includes a sealing ring 800. A third groove 340 is provided on the radially outer peripheral wall of the cooling jacket 300, and the third groove 340 is arranged axially along the cooling jacket 300. The sealing ring 800 is disposed in the third groove 340 and abuts against the inner wall of the housing 100. The sealing ring 800, disposed in the third groove 340 of the cooling jacket 300 and in tight contact with the inner wall of the housing 100, can effectively prevent leakage of coolant or other liquids in the cooling channels.

[0068] In the axial direction of the stator core 200, one end of the cooling channel is sealed by a gasket 700, and the other end of the cooling channel is sealed by a sealing ring 800, thereby sealing both ends of the cooling channel and further suppressing the leakage of coolant in the cooling channel.

[0069] In one embodiment, the motor further includes a baffle 900. One axial end of the stator core 200 abuts against the cooling sleeve 300, and the baffle 900 abuts against the other axial end of the stator core 200 and the cooling sleeve 300. The baffle 900 has a through hole 910 communicating with the positioning hole 500. A screw hole is machined at the axial end of the cooling sleeve 300 away from the gasket 700. The baffle 900 is fastened by the engagement of screws with the screw holes. The baffle 900 abuts against the axial end of the stator core 200 to limit axial movement of the stator core 200 and further ensure the positional accuracy of the positioning hole 500. The through hole 910 is used for one end of the pin 600 to pass through the baffle 900 and be inserted into the positioning hole 500. During bearing installation, the through hole 910 is provided to enable the bearing support to engage with the pin 600.

[0070] The motor, compressor, and air conditioner provided in this application have their front and rear bearing positions controlled entirely by the position of the positioning hole 500 or the pin 600. The housing 100 and the cooling sleeve 300, as well as the cooling sleeve 300 and the stator core 200, are all fitted with clearance fits. This allows the housing 100, cooling sleeve 300, and stator core 200 to be assembled at room temperature, preventing changes in the position of the positioning hole 500 during hot assembly, which could cause compressor malfunctions during operation.

[0071] Meanwhile, since the compressor operates at a high temperature, a cooling jacket 300 is installed inside the motor. The cooling jacket 300, together with the stator core 200 and the housing 100, allows cooling to flow into the cooling channel of the cooling jacket 300 through the liquid inlet 120 and out through the liquid outlet 130, thereby achieving the effect of cooling the stator core 200.

[0072] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0073] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0074] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An electric motor, characterized in that, include: chassis; The stator core is housed within the housing; A cooling jacket is fitted onto the stator core; In the radial direction of the stator core, the cooling sleeve is in clearance fit with the housing, and the cooling sleeve is in clearance fit with the stator core. The inner peripheral wall of the cooling sleeve and the outer peripheral wall of the stator core form a positioning hole.

2. The motor according to claim 1, characterized in that, There is a first gap between the inner peripheral wall of the cooling sleeve along the radial direction and the outer peripheral wall of the stator core along the radial direction. A first groove is provided on the inner peripheral wall of the cooling sleeve along the radial direction, and a second groove is provided on the outer peripheral wall of the stator core along the radial direction. The first gap, the first groove and the second groove form the positioning hole.

3. The motor according to claim 1, characterized in that, The housing is provided with a bearing mounting position, which is located on one side of the stator core along the axial direction. The positioning hole is provided at one end of the stator core along the axial direction near the bearing mounting position.

4. The motor according to claim 1, characterized in that, The housing is provided with a liquid inlet and a liquid outlet. The outer peripheral wall of the cooling jacket along the radial direction has a second gap with the inner wall of the housing. The cooling jacket is provided with a cooling groove, which forms a cooling channel with the second gap. The cooling channel is connected to the liquid inlet and the liquid outlet.

5. The motor according to claim 4, characterized in that, The cooling tank is arranged in a spiral shape, with the liquid inlet located at one end of the extending direction of the cooling tank and the liquid outlet located at the other end of the extending direction of the cooling tank.

6. The motor according to claim 4, characterized in that, The liquid inlet and the liquid outlet are located on opposite sides of the cooling jacket along the radial direction.

7. The motor according to claim 1, characterized in that, The motor also includes a pin, which is inserted into the positioning hole and abuts against the cooling sleeve and the stator core in the radial direction of the stator core.

8. The motor according to claim 1, characterized in that, The motor also includes a gasket, which is connected between the end of the cooling jacket away from the positioning hole and the housing in the axial direction of the stator core.

9. The motor according to claim 1, characterized in that, The motor also includes a sealing ring. The cooling sleeve has a third groove on its radial outer peripheral wall. The third groove is arranged along the axial direction of the cooling sleeve. The sealing ring is disposed in the third groove and abuts against the inner wall of the housing.

10. The motor according to claim 1, characterized in that, The motor also includes a baffle. One end of the stator core along the axial direction abuts against the cooling sleeve. The baffle abuts against the other end of the stator core along the axial direction and the cooling sleeve. The baffle is provided with a through hole that communicates with the positioning hole.

11. A compressor, characterized in that, Including the motor as described in any one of claims 1-10.

12. An air conditioner, characterized in that, Includes the compressor as described in claim 11.

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