Compressor and refrigeration equipment

Abstract

The invention discloses a compressor and refrigeration equipment, and relates to the technical field of compressors, and the compressor comprises a machine shell, a stator iron core and an end plate; the stator iron core is fixed in the machine shell, a plurality of oil return holes are distributed in the stator iron core in the circumferential direction, and the oil return holes penetrate through the stator iron core in the axial direction. The end plate is arranged on the side part of the stator core in the axial direction; wherein at least one of the stator core, the casing and the end plate is provided with a plurality of interception parts, the interception parts and the oil return holes are at least partially opposite in the axial direction, and at least part of the oil return holes or part of the oil return holes are exposed from the interception parts. According to the technical scheme, the oil level in the compressor is controlled to be at the reasonable height, and the operation stability of the compressor is guaranteed.

Description

Technical Field

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

[0002] In a compressor, the oil level is a key indicator affecting compressor operation. When the oil level is too high, the refrigeration lubricant can be carried by the refrigerant into heat exchangers such as the condenser and evaporator, reducing their heat transfer efficiency. When the oil level is too low, the compressor's mechanical structure suffers from oil starvation, causing wear and tear. It can also lead to insufficient heat dissipation from the compressor's motor, resulting in overheating and damage. Summary of the Invention

[0003] The main purpose of the present invention is to provide a compressor and a refrigeration device, which are designed to control the oil level in the compressor to a reasonable height and ensure the operating stability of the compressor.

[0004] To achieve the above object, the present invention provides a compressor comprising: chassis; a stator core, the stator core being fixed in the housing, the stator core being provided with a plurality of oil return holes distributed along the circumferential direction, the oil return holes being provided through the stator core in the axial direction; and an end plate, the end plate being provided on a side portion of the stator core in the axial direction; At least one of the stator core and the end plate is provided with a plurality of intercepting portions, the intercepting portions and the oil return holes are at least partially opposite to each other in the axial direction, the distance between the top of the intercepting portion and the center of the stator core is L1, the maximum distance between the oil return hole and the center of the stator core is L2, and the minimum distance between the oil return hole and the center of the stator core is L3. In the circumferential direction of the stator core, the number of the oil return holes distributed is n1, and the number of the intercepting portions distributed is n2. , ; satisfy: , ; or, satisfy: , at least part of L1 satisfies: .

[0005] In one embodiment, the intercepting portion is protruding from the outer periphery of the end plate.

[0006] In one embodiment, the compressor further comprises a rotor and a fixing member, wherein the rotor is rotatably arranged on the inner circumference of the stator core, the rotating shaft of the rotor is connected to the fixing member, and the fixing member is located below the rotor, the outer circumference of the stator core and the outer circumference of the fixing member are fixedly connected to the inner circumference of the casing, the fixing member is circumferentially distributed with a plurality of oil holes, the central angles of the plurality of intercepting portions corresponding to the axis of the compressor are θ1, θ2, ···, θn, respectively, the maximum distance from the oil hole to the axis of the compressor is M1, the minimum distance from the oil hole to the axis of the compressor is M2, the central angles of the plurality of oil holes corresponding to the axis of the compressor are R1, R2, ···, Rn, respectively, the axial height of the cylinder of the compressor is H1, the inner diameter of the cylinder is D1, and at the position of the minimum distance from the oil return hole to the axis of the compressor, the height of the intercepting portion protruding radially toward the outer circumference of the stator core is L4, satisfying: .

[0007] In one embodiment, the compressor further includes a bearing and the cylinder, and the fixing member is configured as the bearing or the cylinder.

[0008] In one embodiment, the oil through hole is arc-shaped and extends along the circumference of the compressor.

[0009] To achieve the above object, the present invention further provides a compressor, comprising: chassis; a stator core, the stator core being fixed in the housing, the stator core being provided with a plurality of oil return holes distributed along the circumferential direction, the oil return holes being provided through the stator core in the axial direction; and an end plate, the end plate being provided on a side portion of the stator core in the axial direction; The inner circumference of the housing is provided with a plurality of intercepting portions along the circumferential direction. The intercepting portions and the oil return holes are at least partially opposite to each other along the axial direction. The distance between the top of the intercepting portion and the center of the stator core is L5, the maximum distance between the oil return hole and the center of the stator core is L2, and the minimum distance between the oil return hole and the center of the stator core is L3. In the circumferential direction of the stator core, the number of the oil return holes distributed is n1, and the number of the intercepting portions distributed is n2. , ; satisfy: , ; or, satisfy: , at least part of L5 meets: .

[0010] In one embodiment, the compressor further comprises a rotor and a fixing member, wherein the rotor is rotatably arranged on the inner periphery of the stator core, the rotating shaft of the rotor is connected to the fixing member, and the fixing member is configured to be located in a bearing or cylinder of the rotor, the outer periphery of the stator core and the outer periphery of the fixing member are fixedly connected to the inner periphery of the casing, the fixing member is circumferentially distributed with a plurality of oil holes, the central angles of the plurality of intercepting portions corresponding to the axis of the compressor are θ1, θ2, ···, θn, respectively, the maximum distance from the oil hole to the axis of the compressor is M1, the minimum distance from the oil hole to the axis of the compressor is M2, the central angles of the plurality of oil holes corresponding to the axis of the compressor are R1, R2, ···, Rn, respectively, the axial height of the cylinder of the compressor is H1, the inner diameter of the cylinder is D1, and at the position of the minimum distance from the oil return hole to the axis of the compressor, the height of the intercepting portion protruding radially toward the outer periphery of the stator core is L4, satisfying: .

[0011] In one embodiment, the intercepting portion covers the corresponding oil return hole in the circumferential direction of the stator core.

[0012] In one embodiment, a plurality of stator teeth are distributed circumferentially on the inner circumference of the stator core. In the circumferential direction of the stator core, the number of stator teeth distributed is n3, satisfying: ,in, , .

[0013] In one embodiment, the oil return hole is formed as a recessed shape from the outer circumference of the stator core.

[0014] In one embodiment, the compressor further includes a winding, the end plate is fixed to the axial side of the stator core, the end plate is adapted to the stator tooth setting of the stator core, the winding is wound around the stator teeth, and is axially wound between the opposite sides of the two end plates.

[0015] In one embodiment, the end plate is made of an insulating material.

[0016] The present invention also provides a refrigeration device, which includes the compressor as described above.

[0017] The technical solution of the present invention is to provide an intercepting portion corresponding to at least one of the multiple return holes distributed circumferentially on the stator core. The intercepting portion can be formed on one or more of the end plate, the stator core and the casing, so as to control the area of ​​the return oil hole for the circulation of the refrigeration lubricating oil under the influence of the intercepting portion, thereby forming a regulating effect on the return path of the lubricating oil during the operation of the compressor. When the compressor is operating normally, the refrigeration lubricating oil circulates with the refrigerant into the cavity formed by the casing and the upper end of the stator core, and flows back downward through the return oil hole to the oil pool below the casing to cool the stator core and lubricate the moving parts. In this process, since the intercepting portion reduces the circulation area of ​​the oil return hole, the refrigeration lubricating oil reflux speed is slowed down, which is balanced with the rising speed of the oil, so that the refrigeration lubricating oil circulates at a predetermined flow rate. In this way, on the one hand, the rapid backflow of the refrigeration lubricant is limited, so that the oil level of the compressor is maintained within a reasonable height range, so that the refrigeration lubricant can maintain a circulation flow at an appropriate flow rate; on the other hand, the interception part still ensures that the return hole has a sufficient flow channel for the flow of the refrigeration lubricant, and the refrigeration lubricant that continues to pass through the oil return hole can flow back to the oil pool under the casing at a predetermined rate, preventing the refrigeration lubricant from being carried out of the compressor in large quantities, while maintaining the stability of the circulation flow of the refrigeration lubricant, thereby ensuring the stability of the oil film on the surface of the moving parts in the compressor, which is reflected in the fact that the oil level in the compressor is always at a reasonable height, so as to ensure the balance and stability of the lubrication and cooling functions in the compressor, thereby ensuring the operating stability of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a compressor provided by the present invention; Figure 2 for Figure 1 Schematic diagram of the structure of the stator core, end plates and windings; Figure 3 for Figure 1 The relationship between the oil discharge volume of the compressor and the length of L1; Figure 4 for Figure 1 Schematic diagram of the structure of the middle end plate; Figure 5 for Figure 1 Schematic diagram of the structure of the stator core; Figure 6 for Figure 1 Schematic diagram of the structure of the middle bearing; Figure 7 A schematic structural diagram of a cylinder in an embodiment of a compressor provided by the present invention; Figure 8 A diagram showing the relationship between the oil discharge volume and the length L1 of another embodiment of the compressor provided by the present invention; Figure 9 A diagram showing the relationship between the oil discharge volume and the length of L5 according to another embodiment of the compressor provided by the present invention; Figure 10 A diagram showing the relationship between the oil discharge volume and the length of L5 according to another embodiment of the compressor provided by the present invention; Figure 11 This is a diagram showing the area relationship between the oil through hole and the oil return hole of the compressor provided by the present invention.

[0020] Description of Figure Numbers: 100, housing; 200, stator core; 210, oil return hole; 220, stator teeth; 300, end plate; 310, intercepting part; 400, winding; 501, bearing; 502, cylinder; 510, oil hole; 600, rotor.

[0021] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The present invention provides a compressor.

[0026] Please refer to Figure 1 、 Figure 3 、 Figures 8 to 10 In one embodiment of the present invention, the compressor includes a casing 100, a stator core 200 and an end plate 300; the stator core 200 is fixed in the casing 100, and the stator core 200 has a plurality of oil return holes 210 distributed along the circumferential direction, and the oil return holes 210 are arranged axially through the stator core 200; the end plate 300 is arranged on the side of the stator core 200 in the axial direction; wherein, at least one of the stator core 200, the casing 100 and the end plate 300 is provided with a plurality of intercepting portions 310, and the intercepting portions 310 and the oil return holes 210 are at least partially opposite to each other along the axial direction. When all the oil return holes 210 are provided with the intercepting portions 310, at least part of at least part of the oil return holes 210 is exposed from the intercepting portions 310. When some of the oil return holes 210 may not be provided with the intercepting portions 310, the oil return holes 210 provided with the intercepting portions 310 may be completely intercepted by the intercepting portions 310, or may be partially intercepted.

[0027] The technical solution of the present invention is to set an intercepting portion 310 corresponding to at least one of the multiple return holes distributed circumferentially on the stator core 200. The intercepting portion 310 can be formed on one or more of the end plate 300, the stator core 200 and the casing 100, so as to control the area of ​​the return oil hole 210 for the circulation of the refrigeration lubricating oil under the influence of the intercepting portion 310, thereby forming a regulating effect on the return path of the lubricating oil during the operation of the compressor. When the compressor is operating normally, the refrigeration lubricating oil circulates with the refrigerant into the cavity formed by the upper end of the casing 100 and the stator core 200, and flows downward through the return oil hole 210 to the oil pool below the casing 100 to cool the stator core 200 and lubricate the moving parts. In this process, since the intercepting portion 310 reduces the flow area of ​​the return oil hole 210, the refrigeration lubricating oil refrigeration speed is slowed down, which is balanced with the rising speed of the oil, so that the refrigeration lubricating oil circulates at a predetermined flow rate. In this way, on the one hand, the rapid backflow of the refrigeration lubricant is limited, so that the oil level of the compressor is maintained within a reasonable height range, so that the refrigeration lubricant can maintain a circulation flow at an appropriate flow rate; on the other hand, the interception part 310 still ensures that the return hole has a sufficient flow channel for the flow of the refrigeration lubricant, and the refrigeration lubricant that continues to pass through the oil return hole 210 can flow back to the oil pool below the casing 100 at a predetermined rate, preventing the refrigeration lubricant from being carried out of the compressor in large quantities, while maintaining the stability of the circulation flow of the refrigeration lubricant, thereby ensuring the stability of the oil film on the surface of the moving parts in the compressor, which is reflected in the fact that the oil level in the compressor is always at a reasonable height, so as to ensure the balance and stability of the lubrication and cooling functions in the compressor, thereby ensuring the operating stability of the compressor.

[0028] It should be noted that the compressor of this embodiment is configured as a vertical compressor. The upper portion of the casing 100 and the upper side of the stator core 200 form an upper cavity. A rotor 600 is provided on the inner circumference of the stator core 200. The stator core 200 is wound with a winding 400 to form a motor. Components such as bearings 501 and a cylinder 502 are provided below the stator core 200. An oil pool is formed in the lower portion of the casing 100. The rotor 600 is supported by the bearings 501 or the cylinder 502. The refrigerant circulates into the compressor from the position of the cylinder 502. After the cylinder 502 performs work, the refrigerant flows along the gaps and through-holes between the rotor 600 and the stator core 200 to the upper cavity of the casing 100. The refrigerant then leaves the compressor from the upper cavity of the casing 100 and enters the refrigerant circulation. The refrigeration lubricating oil forms an oil circulation between the rotor core and the stator core 200, and the refrigeration lubricating oil flows from bottom to top between the rotor core and the rotor core and the stator core 200, and from top to bottom between the stator core 200 and the casing 100. In the related art, an oil baffle is also provided on the upper part of the rotor 600 to suppress the refrigeration lubricating oil from rising, but this method increases the structural complexity, has a long development cycle, and is costly. The present solution provides an interception portion 310 to act on the flow rate of the refrigeration lubricating oil circulation, ensure the circulation stability of the refrigeration lubricating oil, and thus maintain the oil level of the compressor at a reasonable height, thereby preventing the refrigeration lubricating oil from being brought into the heat exchanger and suppressing the wear of the moving parts in the compressor due to lack of oil.

[0029] In one embodiment, please refer to Figure 1 and Figures 3 to 5 At least one of the stator core 200 and the end plate 300 is provided with a plurality of intercepting portions 310. The distance between the top of the intercepting portion 310 and the center of the stator core 200 is L1. The maximum distance between the oil return hole 210 and the center of the stator core 200 is L2. The minimum distance between the oil return hole 210 and the center of the stator core 200 is L3. In the circumferential direction of the stator core, the number of oil return holes 210 distributed is n1, and the number of intercepting portions 310 distributed is n2. , ,satisfy: , It can be understood that the oil return hole 210 occupies a certain size in the radial direction of the stator core 200. For any oil return hole 210, the distance between the position of the oil return hole 210 closest to the center of the stator core 200 and the center of the circle is L2. Similarly, the distance between the position of the oil return hole 210 farthest from the center of the stator core 200 and the center of the circle is L3. Correspondingly, the distance between the position of the intercepting portion 310 farthest from the center of the stator core 200 and the center of the circle is L1. The oil return hole 210 can be a through hole and independently formed at a position close to the outer periphery of the stator core 200. The oil return hole 210 can also be a through slot, located on the outer periphery of the stator core 200, and assembled with the housing 100. Furthermore, the number n2 of intercepting portions 310 distributed is understood to mean that, on the axial projection of the stator core 200, the number of intercepting portions 310 distributed in the circumferential direction of the stator core 200 can be equal to the number of intercepting portions 310, such as when one intercepting portion 310 is provided at any circumferential position of the stator core 200, or it can be less than the number of intercepting portions 310, such as when two intercepting portions 310 are axially distributed at at least one circumferential position of the stator core 200. The intercepting portions 310 of this embodiment can be provided on the stator core 200 or on the end plate 300, such that at least a portion of the intercepting portions 310 and the corresponding oil return holes 210 are axially opposed to each other in the stator core 200.

[0030] like Figure 3 As shown, the oil discharge volume of the compressor reflects the oil level of the compressor. If the oil discharge volume of the compressor is controlled to be at an ideal oil discharge volume, it means that the oil level of the compressor is at a reasonable level. In the circumferential direction of the stator core 200, the number of oil return holes 210 is greater than the number of interception parts 310, which means that at least one oil return hole 210 is not intercepted by the interception part 310. Based on this scenario, for the length value of L1, L1 is limited to between 1.05 times L3 and L2, which means that L2 is at least greater than 1.05 times L3. The interception part 310 can partially intercept the corresponding oil return hole 210, or it can completely intercept the corresponding oil return hole 210. At this time, the oil discharge volume of the compressor can be maintained between the ideal oil discharge volumes, thereby ensuring that the oil level of the compressor is at a reasonable position. It should be noted that for the formula For example, L1, L2, and L3 are parameters of the intercepting portion 310 and the oil return hole 210 in which the intercepting portion 310 is set, and the same also applies to other intercepting portions 310 and the oil return holes 210 in which the intercepting portions 310 are set. The value of L1 can be 1.05L3, 1.1L3, 0.97L2 or L2.

[0031] In another embodiment, please refer to Figure 1 and Figure 8At least one of the stator core 200 and the end plate 300 is provided with a plurality of intercepting portions 310. The distance between the top of the intercepting portion 310 and the center of the stator core 200 is L1. The maximum distance between the oil return hole 210 and the center of the stator core 200 is L2. The minimum distance between the oil return hole 210 and the center of the stator core 200 is L3. In the circumferential direction of the stator core, the number of oil return holes 210 distributed is n1, and the number of intercepting portions 310 distributed is n2. , ,satisfy: , at least part of L1 satisfies: Among them, the shapes of L1, L2, L3, n2, the oil return hole 210 and the location of the interception part 310 refer to the Figure 3 The description of the embodiment will not be repeated here. It can be understood that Figure 8 As shown, the oil discharge volume of the compressor reflects the oil level of the compressor. If the oil discharge volume of the compressor is controlled to be at an ideal oil discharge volume, it means that the oil level of the compressor is at a reasonable level. In the circumferential direction of the stator core 200, the number of oil return holes 210 is equal to the number of interception parts 310, showing that one oil return hole 210 is intercepted by at least one interception part 310. Based on this scenario, for the length value of L1, at least part of L is limited to be greater than or equal to 1.05 times L3 and less than L2, indicating that at least part of the interception part 310 can partially intercept the corresponding oil return hole 210, but cannot completely intercept the corresponding oil return hole 210. At this time, the oil discharge volume of the compressor can be maintained between the ideal oil discharge volumes, thereby ensuring that the oil level of the compressor is at a reasonable position. It should be noted that at least part of L1 is understood as at least one L1 or multiple L1s, which can be L1 with n2 equal to the number n1, but not in the case of n2=n1, where no L1 satisfies the formula , showing that the oil return hole 210 is not completely blocked by the interception portion 310. For example, L1, L2, and L3 are parameters of the intercepting portion 310 and the oil return hole 210 in which the intercepting portion 310 is set, and the same also applies to other intercepting portions 310 and the oil return holes 210 in which the intercepting portions 310 are set. The value of L1 can be 1.05L3, 1.1L3, 0.97L2 or 0.99L2. Of course, n2=n1 can also be used, and some L1s satisfy: , some L1s satisfy: .

[0032] Regarding the location of the intercepting portion 310, in one embodiment, please refer to Figure 2 and Figure 4The intercepting portion 310 is protruding from the outer periphery of the end plate 300. It should be noted that the outer diameter of the end plate 300 is smaller than the outer diameter of the stator core 200. The intercepting portion 310 is protruding from the outer periphery of the end plate 300, extending radially outward from the end plate 300 and located at the axial end surface of the stator core 200, so that the intercepting portion 310 and the oil return hole 210 on the stator core 200 are at least partially opposite in the axial direction. The end portions are provided on both axial end surfaces of the stator core 200. The intercepting portion 310 can be provided on the end plate 300 at one axial end surface of the stator core 200, or on both end plates 300. In this embodiment, the end plate 300 on the upper side of the stator core 200 is provided with an interception portion 310. The interception portion 310 forms an obstacle to the refrigeration lubricating oil entering the oil return hole 210, which is equivalent to providing a throttling barrier on the oil return path, thereby slowing down the refrigeration speed and flow rate of the oil, matching the speed and flow rate of the refrigeration lubricating oil flowing as the refrigerant rises, thereby suppressing the rapid rise of the oil level and preventing the oil level from falling rapidly, thereby stably controlling the oil level height within a reasonable range and preventing excessive entry of refrigeration oil into the refrigeration cycle system. Among them, the end plate 300 is a standard component, and the interception portion 310 can be integrally formed by stamping or casting processes, without adding additional parts or changing the structure of the stator core 200, thereby reducing manufacturing costs and assembly complexity. Of course, in other embodiments, the interception portion 310 can also be provided on the stator core 200.

[0033] In one embodiment, please refer to Figure 6 、 Figure 7 and Figure 11 The compressor further includes a rotor 600 and a fixing member. The rotor 600 is rotatably arranged on the inner periphery of the stator core 200. The rotating shaft of the rotor 600 is connected to the fixing member. The fixing member is located below the rotor 600. The outer periphery of the stator core 200 and the outer periphery of the fixing member are fixedly connected to the inner periphery of the casing 100. The fixing member has a plurality of oil holes 510 distributed along the circumferential direction. The central angles of the plurality of intercepting portions 310 corresponding to the axis of the compressor are θ1, θ2, ..., θn respectively. The oil holes 510 to The maximum distance between the compressor axis is M1, the minimum distance between the oil hole 510 and the compressor axis is M2, the central angles of the multiple oil holes 510 relative to the compressor axis are R1, R2, ..., Rn, respectively, the axial height of the compressor cylinder 502 is H1, the inner diameter of the cylinder 502 is D1, and at the position of the minimum distance between the oil return hole 210 and the compressor axis, the height of the intercepting portion 310 protruding radially toward the outer periphery of the stator core 200 is L4, satisfying the following: .

[0034] It can be understood that the stator core 200 is fixedly connected to the housing 100, and the stator core 200 can maintain stability within the housing 100. The fixed member is fixedly connected to the housing 100, and the rotor 600 is connected to the fixed member below via a rotating shaft, so that the rotor 600 can also maintain stability within the housing 100. Oil holes 510 are provided on the periphery of the fixed member. The refrigeration lubricating oil in the oil pool below flows upward from the axis of the compressor to between the fixed member and the stator core 200, where it is divided into two cycles: one continues to flow toward the rotor 600, forming a cooling cycle around the rotor 600 and stator, and the other flows back toward the oil holes 510, forming a lubrication cycle around movable parts such as the cylinder 502 and the bearing 501. The oil hole 510 is located below the oil return hole 210. This embodiment limits the relationship between the total area of ​​the plurality of intercepting portions 310 and the total area of ​​the plurality of oil holes 510 to balance the stability of the two cycles, thereby ensuring that the oil level in the compressor is within an ideal range and also ensuring that the compressor's energy efficiency is within a high range. Of course, in other embodiments, a boss may be provided at the oil hole 510 to adapt to the above-mentioned formula requirement for the total area of ​​the intercepting portions 310.

[0035] It should be noted that The total area of ​​the intercepting portions 310 is expressed as the total area of ​​the intercepting portions 310. The calculation method for each intercepting portion 310 is similar to a rectangle: the product of the arc length and the radial width is calculated, and then the sum of the areas of the multiple intercepting portions 310 is calculated to form the total area of ​​the intercepting portions 310. The ratios of π, θ1, θ2, ..., θn to π are simplified in the above formula. It can be seen that It is expressed as one sixth of the total area of ​​the plurality of oil holes 510, wherein the ratios of π, R1, R2, ..., Rn to π have been simplified in the above formula. It can also be seen that, Expressed as The total area of ​​the plurality of oil holes 510 is taken under this limited coefficient, wherein, regarding π, the ratios of R1, R2, ..., Rn to π have been simplified in the above formula. Figure 11 , reflecting the relationship between the total area of ​​the plurality of intercepting parts 310 and the total area of ​​the plurality of oil holes 510, limiting the total area of ​​the plurality of intercepting parts 310 to 1 / 6 of the total area of ​​the plurality of oil holes 510 The total area of ​​the multiple oil holes 510 can ensure that the oil level of the compressor is close to the ideal oil level, and at the same time ensure that the energy efficiency of the compressor is in the peak range, ensuring that the compressor can operate stably in the high efficiency range. It is the limiting coefficient of the maximum proportion of the total area of ​​the plurality of intercepting parts 310 to the total area of ​​the plurality of oil holes 510, which is reflected in the cylinder 502 being the main working component of the compressor. The height-to-diameter ratio of the cylinder 502 reflects the output force of the cylinder 502, the movement frequency of the piston in the cylinder 502, the refrigerant consumption, etc., and has a great relationship with the energy efficiency of the compressor. By introducing this limiting coefficient into this formula, it can ensure the ideal oil level height range and can also achieve higher compressor energy efficiency. In addition, the central angles of the plurality of intercepting parts 310 corresponding to the axis of the compressor are θ1, θ2,..., θn, which are the number of intercepting parts 310 on the axial projection surface of the stator core 200; at the position of the minimum distance from the oil return hole 210 to the axis of the compressor, the height L4 of the intercepting part 310 protruding radially toward the outer periphery of the stator core 200 = L1-L3.

[0036] In one embodiment, please refer to Figure 6 and Figure 7 The compressor further includes a bearing 501 and a cylinder 502, and the fixing member is configured as a bearing 501 or a cylinder 502. It can be seen that the component supporting the rotor 600 is configured as a bearing 501 or a cylinder 502, which avoids the need for additional independent components to support the rotor 600 and simplifies the internal structure of the compressor. At the same time, the structural strength of the bearing 501 and the cylinder 502 can also maintain the stability of the rotor 600 in the housing 100. In this embodiment, please continue to refer to Figure 6 and Figure 7 The oil hole 510 is in an arc shape and extends along the circumference of the compressor. It can be a completely arc-shaped through hole, or the side extending in the circumference can be bent, but the whole is in an arc-shaped extension along the circumference. , which can better reflect the total area of ​​the multiple oil holes 510, while also facilitating adaptation to the inner circumference of the housing 100, allowing the refrigerant lubricant to flow through the oil holes 510 to the oil pool below. Of course, in other embodiments, components below the stator core 200 other than the bearing 501 and cylinder 502 can also be configured as fixed components, or additional components can be added to form such fixed components; alternatively, the oil holes 510 can be located on the periphery of the fixed components and enclosed with the housing 100.

[0037] In another embodiment, please refer to Figure 1 and Figure 9 The inner circumference of the housing 100 is provided with a plurality of intercepting portions 310 along the circumferential direction. The distance between the top of the intercepting portion 310 and the center of the stator core 200 is L5. The maximum distance between the oil return hole 210 and the center of the stator core 200 is L2. The minimum distance between the oil return hole 210 and the center of the stator core 200 is L3. In the circumferential direction of the stator core 200, the number of oil return holes 210 distributed is n1, and the number of intercepting portions 310 distributed is n2. , ,satisfy: , Regarding the shapes of L2, L3, n2, the oil return hole 210 and the location of the interception portion 310, please refer to the Figure 3 The description of the embodiment will not be repeated here. However, the value of L5 is the distance from the top of the intercepting portion 310, which is raised on the inner circumference of the housing 100, to the center of the stator core 200. It is understood that the oil discharge volume of the compressor reflects the oil level in the compressor. Controlling the oil discharge volume of the compressor to an ideal level indicates that the oil level in the compressor is at a reasonable level. In the circumferential direction of the stator core 200, the number of oil return holes 210 is greater than the number of intercepting parts 310, indicating that at least one oil return hole 210 is not intercepted by the intercepting part 310. Based on this scenario, for the length value of L5, L5 is limited to between L3 and 0.97L2, indicating that 0.97 times of L2 is at least greater than L3. The outer side of the oil return hole 210 of the intercepting part 310, that is, one side of the casing 100, can partially intercept the corresponding oil return hole 210, or completely intercept the corresponding oil return hole 210. At this time, the oil discharge volume of the compressor can be maintained between the ideal oil discharge volumes, thereby ensuring that the oil level of the compressor is at a reasonable position. It should be noted that for the formula For example, L5, L2, and L3 are parameters of the intercepting portion 310 and the oil return hole 210 in which the intercepting portion 310 is set, and the same also applies to other intercepting portions 310 and the oil return holes 210 in which the intercepting portions 310 are set. The value of L5 can be L3, 1.05L3, 0.95L2 or 0.97L2.

[0038] In yet another embodiment, please refer to Figure 1 and Figure 10 The inner circumference of the housing 100 is provided with a plurality of intercepting portions 310 along the circumferential direction. The distance between the top of the intercepting portion 310 and the center of the stator core 200 is L5. The maximum distance between the oil return hole 210 and the center of the stator core 200 is L2. The minimum distance between the oil return hole 210 and the center of the stator core 200 is L3. In the circumferential direction of the stator core 200, the number of oil return holes 210 distributed is n1, and the number of intercepting portions 310 distributed is n2. , ,satisfy: , at least part of L5 meets: Regarding the shapes of L2, L3, n2, the oil return hole 210 and the location of the interception portion 310, please refer to the Figure 3 For the description of the embodiment, please refer to the description of L5. Figure 8 The embodiment description is omitted here.

[0039] It is understandable that, Figure 10As shown, the oil discharge volume of the compressor reflects the oil level of the compressor. If the oil discharge volume of the compressor is controlled to be at an ideal oil discharge volume, it means that the oil level of the compressor is at a reasonable level. In the circumferential direction of the stator core 200, the number of oil return holes 210 is equal to the number of interception parts 310, showing that one oil return hole 210 is intercepted by at least one interception part 310. Based on this scenario, for the length value of L5, at least part of L is limited to be greater than L3 and less than or equal to 0.97 times L2, indicating that at least part of the interception part 310 can partially intercept the corresponding oil return hole 210, but cannot completely intercept the corresponding oil return hole 210. At this time, the oil discharge volume of the compressor can be maintained between the ideal oil discharge volumes, thereby ensuring that the oil level of the compressor is at a reasonable position. It should be noted that at least part of L5 is understood as at least one L5 or multiple L5s, which can be L5 with n2 equal to the number n1, but not in the case of n2=n1, where no L5 satisfies the formula , showing that the oil return hole 210 is not completely blocked by the interception portion 310. For example, L5, L2, and L3 are parameters of the intercepting portion 310 and the oil return hole 210 in which the intercepting portion 310 is set, and the same also applies to other intercepting portions 310 and the oil return holes 210 in which the intercepting portions 310 are set. The value of L5 can be 1.05L3, 1.1L3, 0.95L2 or 0.97L2. Of course, n2=n1 can also be used, and some L1 satisfies: , some L1s satisfy: .

[0040] In one embodiment, the intercepting portion 310 is provided on the housing 100. Figure 6 、 Figure 7 and Figure 11 The compressor further includes a rotor 600 and a fixing member. The rotor 600 is rotatably arranged on the inner periphery of the stator core 200. The rotating shaft of the rotor 600 is connected to the fixing member. The fixing member is configured to be located at a bearing 501 or a cylinder 502 of the rotor 600. The outer periphery of the stator core 200 and the outer periphery of the fixing member are fixedly connected to the inner periphery of the casing 100. The fixing member has a plurality of oil holes 510 distributed along the circumferential direction. The central angles of the plurality of intercepting portions 310 corresponding to the axis of the compressor are θ1, θ2, ..., θn, respectively. The maximum distance between the oil hole 510 and the axis of the compressor is M1, the minimum distance between the oil hole 510 and the axis of the compressor is M2, the central angles of the multiple oil holes 510 relative to the axis of the compressor are R1, R2, ..., Rn, respectively, the axial height of the cylinder 502 of the compressor is H1, the inner diameter of the cylinder 502 is D1, and at the position of the minimum distance between the oil return hole 210 and the axis of the compressor, the height of the intercepting portion 310 protruding radially toward the outer periphery of the stator core 200 is L4, satisfying the following: .

[0041] The present embodiment is largely consistent with the above description regarding the total area of ​​the intercepting portion 310 and the total area of ​​the oil through hole 510 , with the following differences: The total area of ​​the multiple intercepting portions 310 in this embodiment is expressed as follows: assuming that a single intercepting portion 310 is a rectangle, the total area of ​​the intercepting portions 310 is calculated by multiplying the arc length by the radial width, and then calculating the sum of the areas of the multiple intercepting portions 310. The ratios of π, θ1, θ2, ..., θn to π are simplified in the above equations. Furthermore, the height L4 of the intercepting portion 310 protruding radially toward the outer periphery of the stator core 200 at the minimum distance between the oil return hole 210 and the compressor axis is L2 - L5. For other details, refer to the above description of the total area of ​​the intercepting portions 310 and the total area of ​​the oil through hole 510, and will not be repeated in this embodiment.

[0042] In one embodiment, no matter the intercepting portion 310 is disposed on any one or more of the end plate 300, the stator core 200, or the housing 100, please refer to Figure 2 and Figure 4 , along the circumference of the stator core 200, the intercepting portion 310 covers the corresponding oil return hole 210. It can be understood that the intercepting portion 310 and the oil return hole 210 are axially opposed, and the size of the intercepting portion 310 along the circumference of the stator core 200 is equal to or greater than the length of the oil return hole 210 in the same direction, thereby ensuring that the oil return hole 210 is fully covered within the circumferential range or at least completely contained within the shielding area of ​​the intercepting portion 310. In this way, the oil must flow back through the radial gap between the intercepting portion 310 and the oil return hole 210, ensuring the stability of the intercepting portion 310's interception of the oil return hole 210. At the same time, the probability of the refrigeration lubricating oil circulating direction deviating along the circumferential direction is reduced, thereby ensuring the stability of the oil circulation flow. As described above regarding the relationship between the total area of ​​the intercepting portion 310 and the total area of ​​the oil through hole 510, reference should also be made to the intercepting portion 310 covering the corresponding oil return hole 210 along the circumference of the stator core 200. Of course, in other embodiments, the intercepting portion 310 and the oil return hole 210 may be partially offset in the circumferential direction.

[0043] Regarding the molding position of the oil return hole 210, in one embodiment, please refer to Figure 2, the oil return hole 210 is formed by being recessed from the outer periphery of the stator core 200. It can be understood that a plurality of evenly distributed groove-type oil return holes 210 are provided along the axial direction on the outer periphery of the stator core 200, and the oil return hole 210 is recessed inwardly from the outer periphery to a certain depth, forming an axial channel extending from the outside to the inside, and after the stator core 200 and the housing 100 are fixedly connected, the oil return hole 210 is enclosed with the housing 100. In this way, a channel path for the refrigeration lubricating oil to flow back downward can be provided while reducing the impact on the structural strength of the stator core 200. Of course, in other embodiments, the oil return hole 210 can also be provided at a position near the outer periphery of the stator core 200, and the oil return hole 210 is not provided through the outer periphery of the stator core 200.

[0044] In one embodiment, please refer to Figure 1 and Figure 2 The compressor also includes windings 400. End plates 300 are fixed to the axial sides of the stator core 200. The end plates 300 are adapted to fit the stator teeth 220 of the stator core 200. The windings 400 are wound around the stator teeth 220 and axially between the opposing sides of the two end plates 300. It can be understood that the stator core 200 is composed of multiple laminated silicon steel sheets, and its inner circumference is provided with multiple stator teeth 220 extending inward to support and position the windings 400. Each stator tooth 220 is wound with windings 400 made of enameled wire, forming the armature portion of the motor. The two end plates 300 are respectively mounted at the axial ends of the stator core 200. The shape of their inner edges matches the distribution of the stator teeth 220, ensuring that the end plates 300 do not interfere with the windings 400 during assembly, while also providing axial support and fixation for the stator core 200. The coil portion of the winding 400 is primarily distributed on the stator teeth 220, while its axially extending end (i.e., the end of the winding 400) is located between the two end plates 300 and is axially supported by the end plates 300. This prevents the end plates 300 from shifting and affecting the relative position between the oil return hole 210 and the intercepting portion 310. Furthermore, the effective restraint and support of the end of the winding 400 limits the axial freedom of the winding 400, preventing axial movement or deformation, thereby improving the electrical safety and service life of the motor. The end plates 300 can be connected to the stator core 200 by plugging.

[0045] Further, in this embodiment, please refer to Figure 1 and Figure 2, the material of the end plate 300 is configured as an insulating material. It can be understood that during the operation of the compressor, a high-voltage current flows through the winding 400. If the end plate 300 is a metal conductor and is not subjected to additional insulation treatment, then under conditions of vibration, thermal expansion and contraction, or aging of the insulation layer, the end of the winding 400 may contact the end plate 300, and then form a conductive loop with the stator core 200 or the casing 100 through the end plate 300, resulting in serious faults such as ground short circuit, increased leakage current, and even motor burning. In this embodiment, the end plate 300 made of insulating material avoids the risk of leakage and improves the electrical safety and operational reliability of the motor and compressor. Among them, the material of the end plate 300 can specifically be plastic, insulating resin, or ceramic composite material.

[0046] Regarding the number of intercepting portions 310 distributed along the circumferential direction, in one embodiment, please refer to Figure 2 , a plurality of stator teeth 220 are distributed circumferentially on the inner circumference of the stator core 200 at intervals. In the circumferential direction of the stator core 200 , the number of stator teeth 220 distributed is n3, satisfying: ,in, , . It can be understood that the number of intercepting parts 310 distributed is not less than the ratio of the number of oil return holes 210 to the number of stator teeth 220. For example, when the number of stator teeth 220 in the stator core 200 is 6 and the number of oil return holes 210 is 12, the number of intercepting parts 310 distributed is at least 2, forming a connection between the number of intercepting parts 310 and the number of stator teeth 220. When the number of stator teeth 220 is high, the power of the motor is high, which is reflected in the strong work done by the cylinder 502. The efficiency of the upward flow of the refrigeration lubricating oil from the rotor 600 is high. Correspondingly, the efficiency of the refrigeration lubricating oil returning from the oil return hole 210 also needs to be maintained at a high level. Therefore, at this time, the number of intercepting parts 310 should not be too many. When the number of stator teeth 220 is high, it can be seen from the ratio of n1 to n3 that the number of intercepting parts 310 distributed can also be low. In this way, it is limited , the number of intercepting portions 310 is adapted to the power of the motor. This results in a higher number of stator teeth 220, higher motor and compressor power, and a higher rate of refrigerant oil circulation. The smaller the number of intercepting portions 310, the more efficient the refrigerant oil circulation efficiency and compressor power. Correspondingly, a larger number of oil return holes 210 results in a faster rate of refrigerant oil return, which can easily lower the compressor's oil level and affect compressor operation. In this case, increasing the number of intercepting portions 310 effectively suppresses the refrigerant oil return efficiency, ensuring the compressor's oil level remains within a reasonable range, thereby improving compressor operational stability.

[0047] The present invention further provides a refrigeration device including a compressor. The specific structure of the compressor is similar to that of the above-described embodiments. Since the present refrigeration device utilizes all the technical solutions of all the above-described embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-described embodiments, and therefore will not be described in detail here. The refrigeration device can be configured as an air conditioner, a refrigerator, etc.

[0048] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformation made by using the contents of the present invention description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the scope of protection of the present invention.

Claims

1. A compressor, characterized in that: include: chassis; A stator core, the stator core being fixed in the housing, the stator core having a plurality of oil return holes distributed along the circumferential direction, the oil return holes being arranged to penetrate the stator core along the axial direction; as well as an end plate, the end plate being provided on a side portion of the stator core in the axial direction; At least one of the stator core and the end plate is provided with a plurality of intercepting portions, the intercepting portions and the oil return holes are at least partially opposite to each other in the axial direction, the distance between the top of the intercepting portion and the center of the stator core is L1, the maximum distance between the oil return hole and the center of the stator core is L2, and the minimum distance between the oil return hole and the center of the stator core is L3. In the circumferential direction of the stator core, the number of the oil return holes distributed is n1, and the number of the intercepting portions distributed is n2. , ; satisfy: , ; or, satisfy: , at least part of L1 satisfies: .

2. The compressor according to claim 1, wherein The intercepting portion is protruding from the outer periphery of the end plate.

3. The compressor according to claim 1, wherein The compressor further includes a rotor and a fixing member, wherein the rotor is rotatably arranged on the inner periphery of the stator core, the rotating shaft of the rotor is connected to the fixing member, and the fixing member is located below the rotor. The outer periphery of the stator core and the outer periphery of the fixing member are fixedly connected to the inner periphery of the casing, the fixing member is circumferentially distributed with a plurality of oil holes, the central angles of the plurality of intercepting portions corresponding to the axis of the compressor are θ1, θ2, ···, θn, respectively, the maximum distance from the oil hole to the axis of the compressor is M1, the minimum distance from the oil hole to the axis of the compressor is M2, the central angles of the plurality of oil holes corresponding to the axis of the compressor are R1, R2, ···, Rn, the axial height of the cylinder of the compressor is H1, the inner diameter of the cylinder is D1, and at the position of the minimum distance from the oil return hole to the axis of the compressor, the height of the intercepting portion protruding radially toward the outer periphery of the stator core is L4, satisfying: 。 4. The compressor according to claim 3, wherein The compressor further includes a bearing (501) and the cylinder, and the fixing member is configured as the bearing (501) or the cylinder; And / or, the oil through hole is arc-shaped and extends along the circumference of the compressor.

5. A compressor, characterized in that: include: chassis; A stator core, the stator core being fixed in the housing, the stator core having a plurality of oil return holes distributed along the circumferential direction, the oil return holes being arranged to penetrate the stator core along the axial direction; as well as an end plate, the end plate being provided on a side portion of the stator core in the axial direction; The inner circumference of the housing is provided with a plurality of intercepting portions along the circumferential direction. The intercepting portions and the oil return holes are at least partially opposite to each other along the axial direction. The distance between the top of the intercepting portion and the center of the stator core is L5, the maximum distance between the oil return hole and the center of the stator core is L2, and the minimum distance between the oil return hole and the center of the stator core is L3. In the circumferential direction of the stator core, the number of the oil return holes distributed is n1, and the number of the intercepting portions distributed is n2. , ; satisfy: , ; or, satisfy: , at least part of L5 meets: .

6. The compressor according to claim 5, characterized in that The compressor further comprises a rotor and a fixing member, wherein the rotor is rotatably arranged on the inner periphery of the stator core, the rotating shaft of the rotor is connected to the fixing member, and the fixing member is configured to be located at a bearing (501) or a cylinder of the rotor, the outer periphery of the stator core and the outer periphery of the fixing member are fixedly connected to the inner periphery of the casing, the fixing member is circumferentially distributed with a plurality of oil holes, the central angles of the plurality of intercepting portions corresponding to the axis of the compressor are θ1, θ2, ···, θn, respectively, the maximum distance between the oil hole and the axis of the compressor is M1, the minimum distance between the oil hole and the axis of the compressor is M2, the central angles of the plurality of oil holes corresponding to the axis of the compressor are R1, R2, ···, Rn, the axial height of the cylinder of the compressor is H1, the inner diameter of the cylinder is D1, and at the position of the minimum distance between the oil return hole and the axis of the compressor, the height of the intercepting portion protruding radially toward the outer periphery of the stator core is L4, satisfying: 。 7. The compressor according to claim 1 or 5, characterized in that In the circumferential direction of the stator core, the intercepting portion covers the corresponding oil return hole; And / or, a plurality of stator teeth are distributed circumferentially on the inner circumference of the stator core at intervals, and the number of stator teeth distributed in the circumferential direction of the stator core is n3, satisfying: ,in, , .

8. The compressor according to claim 1 or 5, characterized in that The oil return hole is concavely formed from the outer periphery of the stator core.

9. The compressor according to claim 1 or 5, characterized in that The compressor further includes a winding, wherein the end plate is fixed to the side of the stator core in the axial direction, the end plate is adapted to be arranged on the stator teeth of the stator core, and the winding is wound around the stator teeth and axially wound between opposite sides of the two end plates; And / or, the material of the end plate is configured as insulating material.

10. A refrigeration device, characterized in that: Comprising the compressor according to any one of claims 1 to 9.

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