Motor, compressor and refrigeration equipment

Abstract

The utility model discloses a motor, a compressor and refrigeration equipment, the motor comprises a stator assembly, a rotor assembly and a shell, the stator assembly sleeves the rotor assembly, and the shell sleeves the stator assembly; a plurality of grooves are formed between the stator assembly and the shell, the sum of the axial projection areas of the grooves is S1, the through-flow area of the rotor assembly is S2, the outer diameter of the stator assembly is D1, the outer diameter of the rotor assembly is D2, the distance between the upper end face of the stator assembly and the upper end face of the shell is L1, the axial size of a stator iron core of the stator assembly is L2, and | S1-S2 | * L2 is smaller than or equal to pi / 8 * (D12-D22) * L1. According to the motor, the oil discharge amount can be reduced, the oil amount in the area between the upper end face of the stator assembly and the upper end face of the shell cannot be too high, it can be ensured that oil can quickly return to an oil pool through the flow field channel, the dynamic balance of the oil is improved, the lubrication, heat dissipation and sealing effects in the motor are improved, and the overall performance and reliability of the motor are improved.

Description

Technical Field

[0001] The present application relates to the technical field of motor manufacturing, and in particular to a motor, a compressor, and a refrigeration device. Background Art

[0002] In refrigeration equipment such as air conditioners and refrigerators, the compressor transfers energy by compressing the refrigerant cycle. During this process, part of the oil in the oil pool at the bottom of the compressor is driven by the refrigerant to participate in the internal circulation of the compressor, providing the necessary lubrication, sealing, and heat dissipation for the motor and bearings in the compressor. With the continuous advancement of refrigeration system technology, higher requirements have been placed on the quality and technology of compressors. However, in related technologies, during the operation of compressors, it is easy to encounter oil shortages or low oil levels due to excessive oil discharge from the compressor. This causes the motor and other components in the compressor to wear out in a high-temperature and high-pressure environment, and the heat dissipation and sealing performance are poor, seriously affecting the reliability, stability and life of the motor and compressor. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a motor that can reduce the amount of oil discharged while ensuring that the oil volume in the area between the upper end surface of the stator assembly and the upper end surface of the housing is not too high, ensuring that the oil can quickly return to the oil pool through the flow field channel, improving the dynamic balance of the oil, enhancing the lubrication, heat dissipation, and sealing effects within the motor, and improving the overall performance and reliability of the motor.

[0004] The present application also provides a compressor having the above motor.

[0005] The present application also provides a refrigeration device having the above compressor.

[0006] According to the motor of the first aspect of the present application, the motor includes: a stator assembly, a rotor assembly and a housing, the stator assembly is sleeved outside the rotor assembly, and the housing is sleeved outside the stator assembly; wherein a plurality of grooves are provided between the stator assembly and the housing, the sum of the axial projection areas of the plurality of grooves is S1, the flow area of ​​the rotor assembly is S2, the outer diameter of the stator assembly is D1, the outer diameter of the rotor assembly is D2, the distance between the upper end surface of the stator assembly and the upper end surface of the housing is L1, the axial dimension of the stator core of the stator assembly is L2, and satisfies: |S1-S2|*L2≤π / 8*(D1 2 -D2 2 )*L1.

[0007] According to the motor of the present application, by optimizing the proportional relationship between the groove area of ​​the stator assembly, the flow area of ​​the rotor assembly, the axial size of the stator core, the outer diameter of the stator assembly, the outer diameter of the rotor assembly, and the distance between the upper end face of the stator assembly and the upper end face of the shell, the oil discharge volume can be reduced, and at the same time, the oil volume in the area between the upper end face of the stator assembly and the upper end face of the shell can be prevented from being too high, which can ensure that the oil can quickly return to the oil pool through the flow field channel, improve the dynamic balance of the oil, thereby effectively improving the lubrication, heat dissipation and sealing effects of the internal components of the motor, and improving the overall performance and reliability of the motor.

[0008] According to some embodiments of the present application, the number of the grooves is N, the number of teeth of the stator assembly is Q, and N≤Q is satisfied.

[0009] In some embodiments, the groove includes: a first groove and a second groove, the first groove and the second groove are arranged sequentially in the circumferential direction of the stator assembly, and the sum of the axial projection areas of the plurality of first grooves is S11, the sum of the axial projection areas of the plurality of second grooves is S12, S11+S12=S1, the number of the first grooves is N1, the number of the second grooves is N2, N1+N2=N.

[0010] Furthermore, the central angle corresponding to the first groove is a1, and satisfies: 0°<a1<(360 / Q)°; the central angle corresponding to the second groove is a2, and satisfies: 0°<a2<(360 / Q)°.

[0011] According to some embodiments of the present application, 1≤S11 / S12≤1.5.

[0012] In some embodiments, a through-hole is provided on the rotor assembly, and the outer contour of the through-hole is one or more of circular, waist-shaped, triangular, and rectangular.

[0013] According to the compressor of the second embodiment of the present application, the compressor includes: the motor described in any one of the above embodiments.

[0014] According to the refrigeration equipment of the third embodiment of the present application, the refrigeration equipment includes: the compressor described in the above embodiment.

[0015] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1is a schematic structural diagram of a compressor according to an embodiment of the present application;

[0018] Figure 2 is a partial structural sectional view of a compressor according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of the coordination between the stator assembly and the housing according to an embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a rotor assembly according to an embodiment of the first aspect of the present application;

[0021] Figure 5 is a schematic diagram of a rotor assembly according to an embodiment of the second aspect of the present application;

[0022] Figure 6 is a schematic diagram of a rotor assembly according to an embodiment of the third aspect of the present application;

[0023] Figure 7 This is a diagram showing the relationship between the volume of oil in the upper cavity and the ratio of S1 / S2 according to an embodiment of the present application.

[0024] Reference numerals:

[0025] 1000, compressor;

[0026] 10. Stator assembly; 12a. First groove; 12b. Second groove; 14. Tooth;

[0027] 20. Rotor assembly; 22. Through hole;

[0028] 30. Shell; 30a. Upper cavity;

[0029] 200, crankshaft;

[0030] 300, main bearing;

[0031] 400, cylinder;

[0032] 500, piston;

[0033] 600, auxiliary bearing;

[0034] 700. Liquid reservoir. DETAILED DESCRIPTION

[0035] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0037] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0039] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0040] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do 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 therefore should not be understood as a limitation on the present application.

[0042] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0043] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0044] The term "plurality" used in this application refers to two or more (including two).

[0045] Reference below Figure 1-Figure 7 The motor, the compressor 1000 and the refrigeration device according to the embodiments of the present application are described.

[0046] like Figure 1 As shown, the motor according to the embodiment of the first aspect of the present application includes: a stator assembly 10, a rotor assembly 20 and a housing 30.

[0047] The stator assembly 10 is sleeved outside the rotor assembly 20, and the housing 30 is sleeved outside the stator assembly 10; there are multiple grooves between the stator assembly 10 and the housing 30, the sum of the axial projection areas of the multiple grooves is S1, the flow area of ​​the rotor assembly 20 is S2, the outer diameter of the stator assembly 10 is D1, the outer diameter of the rotor assembly 20 is D2, the distance between the upper end surface of the stator assembly 10 and the upper end surface of the housing 30 is L1, the axial dimension of the stator core of the stator assembly 10 is L2, and the following conditions are satisfied: |S1-S2|*L2≤π / 8*(D1 2 -D2 2 )*L1.

[0048] Specifically, the rotor assembly 20, the stator assembly 10 and the housing 30 are arranged in sequence from the inside to the outside in the radial direction. The stator assembly 10 can generate a magnetic field through electromagnetic induction. The rotor assembly 20 and the magnetic field generated by the stator assembly 10 cooperate to generate electromagnetic torque, thereby realizing the operation of the motor. The housing 30 is wrapped around the stator assembly 10 and the rotor assembly 20, and can play a good role in fixing and protecting the stator assembly 10, the rotor assembly 20 and other components in the motor. Among them, there are multiple grooves between the outer periphery of the stator assembly 10 and the housing 30, and the multiple grooves are spaced apart in the circumferential direction of the stator assembly 10. The grooves separate at least part of the stator assembly 10 from the housing 30 by a certain space, and this space can be used for oil flow, so that the grooves can optimize the oil flow and cooling effect while maintaining good structural rigidity and stability of the motor; multiple channels can be formed on the rotor assembly 20, and the total flow area of ​​the multiple channels is S2. These channels are used to realize the circulation of oil between the rotor assembly 20 and the stator assembly 10, etc., so as to lubricate and dissipate heat for the motor.

[0049] It should be pointed out that the distance between the upper end face of the stator assembly 10 and the upper end face of the shell 30 can be understood as the stator shrink fit height, and the cavity defined by the shell 30 corresponding to the stator shrink fit height is the upper cavity 30a; the axial dimension of the stator core of the stator assembly 10 can be understood as the thickness of the stator core. In the embodiment of the present application, the distance L1 between the upper end face of the stator assembly 10 and the upper end face of the shell 30, the axial dimension L2 of the stator core of the stator assembly 10, the outer diameter D1 of the stator assembly 10, the outer diameter D2 of the rotor assembly 20, the sum of the axial projection areas S1 of the multiple grooves, and the flow area S2 of the rotor assembly 20 satisfy the relationship ∣S1-S2∣*L2≤π / 8*(D1 2 -D2 2 )*L1, to limit the spatial relationship between the groove area of ​​the stator assembly 10, the flow area of ​​the rotor assembly 20 and the upper cavity 30a, to ensure that the distribution and flow of oil inside the motor remain within a reasonable range, thereby reducing the amount of oil accumulation in the upper cavity 30a, and further achieving a dynamic balance of oil between the stator assembly 10, the rotor assembly 20 and the upper cavity 30a.

[0050] According to the motor of the present application, by optimizing the proportional relationship between the groove area of ​​the stator assembly 10, the flow area of ​​the rotor assembly 20, the axial size of the stator core, the outer diameter of the stator assembly 10, the outer diameter of the rotor assembly 20, and the distance between the upper end face of the stator assembly 10 and the upper end face of the housing 30, the oil discharge volume can be reduced, and at the same time, the oil volume in the area between the upper end face of the stator assembly 10 and the upper end face of the housing 30 can be prevented from being too high, which can ensure that the oil can quickly return to the oil pool through the flow field channel, improve the dynamic balance of the oil, thereby effectively improving the lubrication, heat dissipation and sealing effects of the internal components of the motor, and improving the overall performance and reliability of the motor.

[0051] In addition, in some specific embodiments of the present application, Figure 7 As shown, the relationship between the amount of oil accumulated in the upper cavity 30a and the ratio of the total area of ​​the grooves of the stator assembly 10 to the flow area of ​​the rotor assembly 20 is reflected. By adjusting the total area of ​​the grooves of the stator assembly 10 and the flow area of ​​the rotor assembly 20, the amount of oil in the upper cavity 30a can be reduced, thereby improving the lubrication, cooling and sealing effects of the motor, reducing noise, and improving energy efficiency.

[0052] like Figure 3 As shown, according to some embodiments of the present application, the number of grooves is N, the number of teeth of the stator assembly 10 is Q, and N≤Q is satisfied.

[0053] Specifically, the stator assembly 10 may have a plurality of teeth 14 on a side radially away from the housing 30, and the plurality of teeth 14 are spaced apart in the circumferential direction of the stator assembly 10. The number of teeth 14 (i.e., the number of teeth) Q of the stator assembly 10 is greater than or equal to the number of grooves N. For example, in some embodiments, the number of teeth may be 9, and the number of grooves may be 4 or 6, etc. By limiting N≤Q, on the one hand, it is possible to ensure that the teeth 14 of the stator assembly 10 occupy a dominant position, which is beneficial to improving the efficiency of the motor magnetic field distribution and energy conversion. At the same time, a reasonable number of grooves allows the outer periphery of the stator assembly 10 between adjacent grooves to be in intermittent contact with the housing 30, which can also improve the heat conduction path and flow effect between the stator assembly 10 and the housing 30, thereby improving heat dissipation efficiency and operational reliability. On the other hand, by reducing the number of grooves (relative to the number of teeth), the portion of the outer periphery of the stator assembly 10 in direct contact with the housing 30 is correspondingly reduced, which can optimize the overall structure of the stator assembly 10. While maintaining the necessary contact with the housing 30 to ensure stability, the stator assembly 10 can also reduce unnecessary contact, thereby reducing potential vibration noise and assembly difficulty. Therefore, by setting N≤Q, a good flow effect can be achieved, while improving the stiffness of the stator assembly 10 and improving vibration and noise reduction performance.

[0054] like Figure 3 As shown, according to some embodiments of the present application, the groove includes: a first groove 12a and a second groove 12b, the first groove 12a and the second groove 12b are arranged sequentially in the circumferential direction of the stator assembly 10, and the sum of the axial projection areas of the multiple first grooves 12a is S11, the sum of the axial projection areas of the multiple second grooves 12b is S12, S11+S12=S1, the number of first grooves 12a is N1, the number of second grooves 12b is N2, N1+N2=N.

[0055] Specifically, the outer periphery of the stator assembly 10 is provided with a first groove 12a and a second groove 12b arranged in sequence at intervals, and the areas of the first groove 12a and the second groove 12b are different. For example, the area of ​​the first groove 12a is constructed to be larger than the area of ​​the second groove 12b. It can be understood that the first groove 12a with a relatively large area can guide more oil through certain specific areas, and the second groove 12b with a relatively small area helps to maintain the stability of the stator assembly 10 and can be used for local adjustment or enhancement of the stiffness of the stator assembly 10. Therefore, by setting the first groove 12a and the second groove 12b, it is beneficial to provide more possibilities for the motor performance and improve the adaptability of the motor in different working conditions.

[0056] It should be pointed out that the contact portion between the outer periphery of the stator assembly 10 and the housing 30 is defined between two adjacent grooves. Providing different first grooves 12a and second grooves 12b is also conducive to improving the design flexibility of the contact portion between the outer periphery of the stator assembly 10 and the housing 30, so as to balance the contact force and flow performance between the stator assembly 10 and the housing 30, and optimize the overall mechanical properties, stiffness and working performance of the motor.

[0057] like Figure 3 As shown, according to some embodiments of the present application, the central angle corresponding to the first groove 12a is a1, and satisfies: 0°<a1<(360 / Q)°, and the central angle corresponding to the second groove 12b is a2, and satisfies: 0°<a2<(360 / Q)°.

[0058] Specifically, the size of the central angle of the first groove 12a and the second groove 12b directly affects the opening area thereof, thereby affecting the flow effect of the oil inside the motor. At the same time, the opening of the first groove 12a and the second groove 12b will also weaken the structural rigidity of the stator assembly 10 to a certain extent. When the central angle corresponding to the first groove 12a and the second groove 12b is greater than or equal to (360 / Q)°, it is easy to cause insufficient holding force between the stator assembly 10 and the housing 30, reduce the rigidity and modal performance of the motor, increase the vibration and noise of the motor, and affect the running stability and life of the motor. In the embodiment of the present application, by setting the first groove 12a and the second groove 12b, the stator assembly 10 and the housing 30 are not provided with a plurality of grooves. The central angles corresponding to b are both greater than 0° and less than (360 / Q)°. For example, if the number of teeth Q is constructed to be 9, the central angles corresponding to the first groove 12a and the second groove 12b should both be greater than 0° and less than 40°, so that the first groove 12a and the second groove 12b have a suitable size range in the circumferential direction of the stator assembly 10, which can ensure that the grooves are neither too large to affect the stator stiffness nor too small to limit the fluid flow effect, thereby achieving a balanced relationship between the fluid flow effect and the improvement of the stiffness of the stator assembly 10, ensuring the stiffness of the stator assembly 10, and ensuring the flow of the stator assembly 10, which is conducive to enhancing the oil return rate and maintaining a sufficient amount of oil in the upper cavity 30a.

[0059] like Figure 3 As shown, according to some embodiments of the present application, 1≤S11 / S12≤1.5.

[0060] Specifically, a relatively large groove area is conducive to the storage and rapid flow of fluid, but it will also weaken the structural rigidity of the stator assembly 10 to a certain extent, while a relatively small groove area may limit the flow rate of the fluid, but it helps to maintain the stability of the stator assembly 10. When the ratio of the sum of the areas of the multiple first grooves 12a to the sum of the areas of the multiple second grooves 12b is too large, for example, S11 / S12 is 2, 2.5 or 3, etc., the contact area between the stator assembly 10 and the housing 30 will be reduced, resulting in insufficient holding force of the stator assembly 10 and a risk of failure. At the same time, if the area of ​​the first groove 12a is too large, it will also weaken the rigidity of the surrounding structure, resulting in the problem of increased vibration or noise during the operation of the motor. By increasing the area of ​​the multiple first grooves 12a The ratio of the sum of the areas of the first grooves 12a and the second grooves 12b is set within a range of 1 to 1.5, ensuring a reasonable area ratio between the first grooves 12a and the second grooves 12b. This improves the integrity and stability of the magnetic circuit, ensuring that the motor can generate sufficient electromagnetic force during operation, thereby meeting performance requirements. Furthermore, the appropriate distribution of the areas of the first and second grooves 12a and 12b further improves the vibration characteristics of the stator assembly 10, enhancing the overall stability and durability of the stator, and reducing vibration and noise. Furthermore, by controlling the S11 / S12 ratio range, the fluid can flow smoothly within the motor, improving lubrication and heat dissipation efficiency. This helps improve motor operating efficiency, reduce wear, and extend motor service life. Therefore, by optimizing the area ratio range between the first and second grooves 12a and 12b, the stiffness and flow rate of the stator assembly 10 can be improved while ensuring magnetic circuit conditions, thereby achieving the goal of reducing noise.

[0061] like Figure 4-Figure 6 As shown, according to some embodiments of the present application, a through hole 22 is provided on the rotor assembly 20 , and the outer contour of the through hole 22 is one or more of a circle, a waist, a triangle, and a rectangle.

[0062] Specifically, the rotor assembly 20 may be formed with a plurality of through-holes 22, and the plurality of through-holes 22 may be spaced apart in the circumferential direction of the rotor assembly 20. The plurality of through-holes 22 may also be configured to be arranged in an array on the rotor assembly 20. The outer contours of the plurality of through-holes 22 (i.e., the projected contours in the axial direction of the rotor assembly 20) may be the same. For example, the outer contours of the plurality of through-holes 22 may all be configured as follows: Figure 4 The waist shape shown here can be understood as an approximately elliptical shape, and the outer contours of the plurality of through-flow holes 22 can also be constructed as follows Figure 5The triangle shown here can be understood as an approximate triangle, rather than an absolute triangle shape. The outer contours of the plurality of through-holes 22 can also be constructed as follows: Figure 6 The circle shown in FIG. 2 , in some other embodiments, the outer contours of the plurality of through-flow holes 22 can also be constructed as a rectangle; the outer contours of the plurality of through-flow holes 22 can also be different, and the outer contours of the plurality of through-flow holes 22 can include a circle, a waist shape, a triangle and a rectangle. For example, the outer contour of at least a portion of the through-flow holes 22 can be constructed as a circle, and the outer contour of at least another portion of the through-flow holes 22 can be constructed as a waist shape or a triangle, etc.

[0063] It should be noted that the circular through-holes 22 have good fluid dynamics, which can reduce the resistance to fluid flow and allow the fluid to pass through with minimal energy loss, ensuring that the rotor assembly 20 has sufficient fluid flow while reducing the heat accumulation caused by fluid resistance. The waist-shaped through-holes 22 can provide a relatively large flow area, which helps to improve efficiency in applications requiring directional fluid flow. For example, when it is necessary to enhance the cooling effect in a specific direction, the waist-shaped through-holes 22 can more effectively guide the fluid flow and ensure that the rotor assembly 20 obtains sufficient cooling in that direction. The rectangular through-holes 22 can be relatively easily aligned with other rectangular or linear structures (such as the cooling channels inside the motor) to improve manufacturing convenience and save production costs, while the triangular through-holes 22 can provide a more uniform fluid flow pattern under certain specific fluid distribution requirements and improve the uniformity of oil distribution. By combining the use of through-holes 22 of different shapes, uniform fluid distribution can be achieved on the rotor assembly 20, and the direction and speed of the fluid flow can be adjusted as needed, which is conducive to ensuring that all areas around the rotor assembly 20 can obtain sufficient fluid support.

[0064] By configuring the outer contour of the flow hole 22 to be one or more of circular, waist-shaped, triangular, and rectangular, optimization can be achieved in terms of fluid dynamics efficiency, fluid distribution uniformity, and design flexibility, thereby ensuring a good flow rate of the rotor assembly 20 and improving the overall performance and energy efficiency of the motor.

[0065] like Figure 1 and Figure 2As shown, according to the compressor 1000 of the second aspect embodiment of the present application, the compressor 1000 includes: a motor described in any one of the above embodiments. Since the compressor 1000 according to the second aspect embodiment of the present application is provided with the motor described in any one of the above embodiments, the motor of the compressor 1000 can reduce the oil discharge volume, while ensuring that the oil volume in the area between the upper end surface of the stator assembly 10 and the upper end surface of the shell 30 is not too high, so as to improve the dynamic balance of the oil, thereby enhancing the lubrication, heat dissipation and sealing effects of the internal components of the motor. Moreover, the stator assembly 10 in the motor of the compressor 1000 has good retention force and flow field circulation capacity, which can improve the stiffness, modal performance and flow capacity of the motor, thereby improving the operating stability, reliability and service life of the compressor 1000.

[0066] In addition, in some specific embodiments of the present application, the compressor 1000 further includes: a crankshaft 200, a power unit, a main bearing 300, a cylinder 400, a piston 500, a secondary bearing 600, and a liquid reservoir 700. Among them, one end of the crankshaft 200 is passed through the rotor assembly 20 and is connected to the rotor assembly 20. The crankshaft 200 is also connected to the power unit. The power unit is configured to drive the crankshaft 200 to rotate. When the power unit is working, it can drive the crankshaft 200 to rotate, and then drive the rotor assembly 20 to rotate. The main bearing 300, the cylinder 400, and the secondary bearing 600 are all sleeved on the outer periphery of the crankshaft 200, and are arranged in sequence away from the rotor assembly 20 in the axial direction of the crankshaft 200. The main bearing 300 and the secondary bearing 600 can be respectively at different positions on the crankshaft 200 to support the crankshaft 20. 0 and reduces friction and wear during its rotation, which helps to improve the running stability of the compressor 1000; a piston 500 is provided in the cylinder 400, and the piston 500 is connected to the crankshaft 200. The rotation of the crankshaft 200 can drive the piston 500 to reciprocate in the cylinder 400, thereby ensuring that the compression work of the compressor 1000 is effectively completed and energy consumption is saved; the liquid accumulator 700 is used to store, separate gas and liquid, filter, muffle noise and buffer the refrigerant in the compressor 1000 to ensure the normal operation of the compressor 1000.

[0067] like Figure 1-Figure 7 As shown, according to the refrigeration equipment of the third embodiment of the present application, the refrigeration equipment includes: the compressor 1000 described in the above embodiment, and the technical effects produced are consistent with those in the above embodiment, which will not be repeated here.

[0068] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A motor, characterized in that: include: A stator assembly, a rotor assembly, and a housing, wherein the stator assembly is sleeved outside the rotor assembly, and the housing is sleeved outside the stator assembly; in There are multiple grooves between the stator assembly and the housing, the sum of the axial projection areas of the multiple grooves is S1, the flow area of ​​the rotor assembly is S2, the outer diameter of the stator assembly is D1, the outer diameter of the rotor assembly is D2, the distance between the upper end surface of the stator assembly and the upper end surface of the housing is L1, the axial dimension of the stator core of the stator assembly is L2, and the following conditions are satisfied: |S1-S2|*L2≤π / 8*(D1 2 -D2 2 )*L1.

2. The motor according to claim 1, characterized in that The number of the grooves is N, the number of teeth of the stator assembly is Q, and N≤Q is satisfied.

3. The motor according to claim 1 or 2, characterized in that The grooves include: a first groove and a second groove, the first groove and the second groove are arranged sequentially in the circumferential direction of the stator assembly, and the sum of the axial projection areas of the multiple first grooves is S11, and the sum of the axial projection areas of the multiple second grooves is S12, S11+S12=S1, the number of the first grooves is N1, the number of the second grooves is N2, N1+N2=N.

4. The motor according to claim 3, characterized in that The central angle corresponding to the first groove is a1, and satisfies: 0°<a1<(360 / Q)°; the central angle corresponding to the second groove is a2, and satisfies: 0°<a2<(360 / Q)°.

5. The motor according to claim 3, characterized in that 1≤S11 / S12≤1.

5.

6. The motor according to claim 1, characterized in that The rotor assembly is provided with a through-hole, and the outer contour of the through-hole is one or more of circular, waist-shaped, triangular, and rectangular.

7. A compressor, characterized in that: include: The motor according to any one of claims 1 to 6.

8. A refrigeration device, characterized in that: include: The compressor according to claim 7.

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