Inner stator structure, outer stator structure and linear compressor
By designing a multi-layer inner stator ring and a sleeved outer stator ring, combined with the inter-block gap and the filling structure of the supplementary block, the problem of increasing magnetic resistance between the inner and outer stator lamination gaps of the linear compressor is solved, and the effect of improving the motor efficiency is achieved.
Patent Information
- Application Number
- CN202422209588.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The laminate gaps between the inner and outer stators of existing linear compressors increase magnetoresistance, resulting in a decrease in motor efficiency.
An inner and outer stator structure is designed, in which the inner stator ring consists of a plurality of inner stator laminates, the outer stator ring is sleeved outside the inner stator ring, and by setting the gap between the inner stator blocks and the outer stator blocks, the gap is filled with the outer stator supplementary block and the insulating fixing block to increase magnetic permeability.
By increasing the lamination coefficient of the inner and outer stators, the magnetoresistance is reduced, the saturation working point of the motor is improved, and the motor efficiency is improved.
Smart Images
Figure CN223039718U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of compressors, and particularly relates to an inner and outer stator structure and a linear compressor. Background Art
[0002] In order to reduce the eddy current loss of the inner and outer stators, the inner and outer stator yokes of the existing linear compressor are formed by sequentially stacking a plurality of stator sheet groups in the circumferential direction. The inner stator is generally composed of silicon steel sheets of the same thickness. Due to the different inner and outer diameters of the group rings, a certain angle will be formed between adjacent inner stator sheets, and the larger the diameter difference, the larger the angle. For the outer stator, it is generally composed of multiple stator blocks in the same sector shape, and the block gap between the stator blocks is larger than the angle gap. The lamination gap of the inner and outer stators will increase the magnetic resistance, thereby reducing the efficiency of the compressor motor.
[0003] Therefore, it is urgent to design an inner and outer stator structure and a linear compressor to solve the above-mentioned problems. Summary of the Utility Model
[0004] The purpose of the utility model is to provide an inner and outer stator structure and a linear compressor, which have the advantages of increasing the lamination coefficient of the inner and outer stators and reducing the magnetic resistance, and solve the problems mentioned in the background art.
[0005] To achieve the above purpose, the specific technical solutions of an inner and outer stator structure and a linear compressor of the utility model are as follows:
[0006] An inner and outer stator structure includes an inner stator ring and an outer stator ring. The outer stator ring is sleeved outside the inner stator ring. The inner stator ring includes a plurality of inner stator laminations, and the plurality of inner stator laminations are fixedly connected to form the inner stator ring. The specific number of the inner stator rings is at least two, and the adjacent inner stator rings are sequentially sleeved.
[0007] Further, an inner stator block gap is provided between the circumferentially adjacent inner stator laminations, and the inner stator block gap of the inner stator ring on the inner side is connected to the inner stator laminations of the adjacent outer stator ring on the outer side.
[0008] Further, the inner stator laminations of the inner stator ring on the inner side are radially connected to the inner stator laminations of the outer stator ring on the outer side.
[0009] Further, the outer circumferential end of the inner stator ring on the inner side is fixedly connected to the inner circumferential end of the adjacent outer stator ring on the outer side.
[0010] Further, the outer stator ring includes a plurality of outer stator blocks, and the plurality of outer stator blocks are fixedly connected to form the outer stator ring.
[0011] Further, an outer stator block gap is provided between the adjacent outer stator blocks, and a plurality of outer stator supplementary blocks and an insulating fixing block are respectively connected to the plurality of outer stator block gaps.
[0012] Furthermore, the outer stator block is fixedly connected to its adjacent outer stator supplementary block.
[0013] Furthermore, the outer stator block includes a first outer stator block and a second outer stator block. The first outer stator block and the second outer stator block are located at both ends of the winding, and the first outer stator block and the second outer stator block are fixedly connected to the winding.
[0014] Furthermore, inner stator pressing plates are connected to both ends of the inner stator ring, and outer stator pressing plates are connected to both ends of the outer stator ring. The inner stator pressing plates and the outer stator pressing plates are fixed by stator connection plates.
[0015] A linear compressor includes inner and outer stator structures. A mover is provided in the inner and outer stator structures, and the mover moves linearly through electromagnetic principles. The linear compressor further includes a compression part, and the compression part is driven by the mover.
[0016] The utility model has the following advantages: the stacking factor of the inner and outer stators is increased, the magnetic resistance is reduced, the saturation working point of the motor is improved, and it is beneficial to improve the motor efficiency. Description of the Drawings
[0017] Figure 1 is a schematic diagram of the overall structure of the linear compressor of the utility model;
[0018] Figure 2 is a schematic diagram of the structure of the inner stator of the utility model;
[0019] Figure 3 is a schematic diagram of the structures of the outer stator, the outer stator supplementary block, and the insulation fixing block of the utility model;
[0020] Figure 4 is a schematic diagram of the structures of the first outer stator block, the winding, and the second outer stator block of the utility model;
[0021] Marking description in the figure: 1, inner stator ring; 11, inner stator lamination; 12, clearance between inner stator blocks; 2, outer stator ring; 21, outer stator supplementary block; 22, insulation fixing block; 23, clearance between outer stator blocks; 24, first outer stator block; 25, winding; 26, second outer stator block; 3, outer stator pressing plate; 31, inner stator pressing plate; 32, stator connection plate. Detailed Embodiments
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.
[0023] Those skilled in the art can understand that although some of the embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present utility model and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.
[0024] The following will Figure 1 refer to the appended Figure 4 drawings to describe an inner and outer stator structure and a linear compressor of the present utility model.
[0025] The working components of the linear compressor mainly include two parts: a motor and a compressor.
[0026] The motor part is composed of a stator and a mover. The stator is fixed on the compressor housing, and the mover moves linearly through the electromagnetic principle. The interaction between the mover and the stator generates a magnetic field, and then linear motion occurs, which is the basis for the operation of the linear compressor.
[0027] Among them, the stator is the inner and outer stator structure in the present utility model.
[0028] The compressor part mainly consists of a cylinder and a piston. The cylinder is fixed on the compressor housing, and the piston is connected to the motor mover through a connecting rod. When the motor mover moves linearly, this vibration is transmitted to the piston through the connecting rod, causing the piston to reciprocate in the cylinder. This motion realizes the compression and release of the refrigerant, thereby completing the refrigeration or heating process.
[0029] Currently, the existing inner stator is generally composed of silicon steel sheets of the same thickness. Due to the different inner and outer diameters of the group ring, a certain angle will be formed between adjacent inner stator sheets, and the larger the diameter difference, the larger the angle. The lamination gap of the inner stator will increase the magnetic resistance, resulting in a reduction in the efficiency of the compressor motor.
[0030] Therefore, this inner and outer stator structure includes an inner stator ring 1 and an outer stator ring 2. The outer stator ring 2 is sleeved outside the inner stator ring 1. The inner stator ring 1 includes a plurality of inner stator laminations 11, and the plurality of inner stator laminations 11 are fixedly connected to form the inner stator ring 1. The specific number of the inner stator rings 1 is at least two, and adjacent inner stator rings 1 are sequentially sleeved.
[0031] Preferably, the specific number of the inner stator laminations 11 is multiple. When the diameter of the inner stator ring 1 is fixed, the more the number of the inner stator laminations 11, the smaller the distance of the inner stator block gap 12.
[0032] Preferably, the specific number of the inner stator rings 1 is at least two. The specific number of the inner stator rings 1 can be determined according to the diameter difference of the inner stator and the processing technology. Of course, the more the number of the inner stator rings 1, the smaller the distance of the inner stator block gap 12.
[0033] By splitting the inner stator into at least two inner stator rings 1 in the radial direction, and the inner stator rings 1 are composed of multiple inner stator laminations 11, and the inner stator laminations 11 are kept in a thinner state. With the superposition of these two methods, the diameter difference of a single ring is reduced, the lamination gap of the inner stator can be significantly reduced, the magnetic resistance is reduced, and the saturation working point of the motor is improved.
[0034] Specifically, the diameter differences of the inner stator laminations 11 of the inner stator rings 1 in different layers are the same, that is, the sizes of the inner stator laminations 11 are the same. Thus, only the number of the laminations between the inner and outer rings of the inner stator is different, reducing the die cost.
[0035] Preferably, the fixed connection method of the multiple inner stator laminations 11 and the fixed connection method of the adjacent inner stator rings 1 are preferably adhesive bonding. In other embodiments of the present invention, other fixed connection methods such as screwing can also be used, as long as the fixed connection of the multiple inner stator laminations 11 and the fixed connection of the adjacent inner stator rings 1 can be satisfied.
[0036] Preferably, as Figure 2 shown, an inner stator block gap 12 is provided between the circumferentially adjacent inner stator laminations 11. The inner stator block gap 12 of the inner side inner stator ring 1 is connected to the inner stator laminations 11 of the adjacent outer side inner stator ring 1, and the inner stator laminations 11 of the inner side inner stator ring 1 are radially connected to the inner stator laminations 11 of the outer side inner stator ring 1, further reducing the magnetic resistance.
[0037] The first and third pieces of every three pieces of the inner stator laminations 11 of the inner side inner stator ring 1 and the first and fourth pieces of every four pieces of the inner stator laminations 11 of the outer side inner stator ring 1 are located on the same radial line. The second piece of every three pieces of the inner stator laminations 11 of the inner side inner stator ring 1 separates two inner stator block gaps 12, and the second and third pieces of every four pieces of the inner stator laminations 11 of the outer side inner stator ring 1 are respectively located between the two inner stator block gaps 12.
[0038] When the inner stator laminations 11 of the inner side inner stator ring 1 are arrayed by every three pieces, the third piece coincides with the first piece. When the inner stator laminations 11 of the outer side inner stator ring 1 are arrayed by every four pieces, the fourth piece coincides with the first piece.
[0039] Regarding the connection method of adjacent inner stator rings 1, it is preferably fixedly connected between the outer circumferential end of the inner inner stator ring 1 and the inner circumferential end of its adjacent outer inner stator ring 1.
[0040] When there are two inner stator rings 1, the stacking factor is 0.9. When there is one inner stator ring 1, the stacking is 0.84. From this comparison, it can be seen that the magnetic conductivity of the inner stator is increased.
[0041] Specifically, the outer stator ring 2 includes a plurality of outer stator blocks. The plurality of outer stator blocks are fixedly connected to form the outer stator ring 2. There are outer stator block gaps 23 between adjacent outer stator blocks. An outer stator supplementary block 21 and an insulating fixing block 22 are respectively connected to the plurality of outer stator block gaps 23. By providing the outer stator supplementary block 21 connected to the outer stator block gap 23, the outer stator block gap 23 of the outer stator ring 2 composed of outer stator blocks is filled by the outer stator supplementary block 21, increasing the magnetic conductivity of the outer stator.
[0042] Specifically, the specific number of the insulating fixing blocks 22 is one.
[0043] Preferably, the shape of the outer stator supplementary block 21 is triangular to fill the outer stator block gap 23. In other embodiments of the present invention, the outer stator supplementary block 21 can also be fan-shaped, etc., as long as it can fill the outer stator block gap 23.
[0044] Preferably, the specific number of the outer stator supplementary blocks 21 is one less than the number of the outer stator block gaps 23. One of the reduced outer stator block gaps 23 is filled with the insulating fixing block 22. In other embodiments of the present invention, the specific number of the outer stator supplementary blocks 21 can also be multiple, as long as it can enhance the magnetic conductivity of the outer stator.
[0045] Preferably, the outer stator block and the adjacent outer stator supplementary block 21 are fixedly connected by an adhesive. In other embodiments of the present invention, other fixed connection methods such as screwing can also be used, as long as it can satisfy the fixed connection between the outer stator block and its adjacent outer stator supplementary block 21.
[0046] Regarding when the outer stator block gap 23 is filled by the outer stator supplementary block 21, the stacking factor is 0.93. When there is no outer stator supplementary block 21 between the outer stator block gaps 23, the stacking factor is 0.83. From this comparison, it can be seen that the magnetic conductivity of the outer stator is increased.
[0047] Specifically, the outer stator block includes a first outer stator block 24 and a second outer stator block 26. The first outer stator block 24 and the second outer stator block 26 are located at both ends of the winding 25. The first outer stator block 24 and the second outer stator block 26 are fixedly connected to the winding 25. Through the insulating fixing block 22, a winding space for the winding 25 is left.
[0048] Specifically, both ends of the inner stator ring 1 are connected with inner stator pressing plates 31, and the inner stator ring 1 is fixed by the inner stator pressing plates 31. Both ends of the outer stator ring 2 are connected with outer stator pressing plates 3, and the outer stator ring 2 is fixed by the outer stator pressing plates 3. The inner stator pressing plates 31 and the outer stator pressing plates 3 are fixed by a stator connecting plate 32, and the inner stator and the outer stator are fixed by the stator connecting plate 32.
[0049] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.
Claims
1. An inner and outer stator structure, characterized in that: It includes an inner stator ring and an outer stator ring. The outer stator ring is sleeved outside the inner stator ring. The inner stator ring includes a plurality of inner stator laminations. The plurality of inner stator laminations are fixedly connected to form the inner stator ring. The specific number of the inner stator rings is at least two, and adjacent inner stator rings are sleeved in sequence.
2. The inner and outer stator structures according to claim 1 are characterized in that: An inner stator block gap is provided between the inner stator laminations adjacent to each other in the circumferential direction, and the inner stator block gap of the inner inner stator ring is connected to the inner stator lamination of the outer inner stator ring adjacent to the inner stator ring.
3. The inner and outer stator structures according to claim 2 are characterized in that: The inner stator laminations of the inner inner stator ring are radially connected to the inner stator laminations of the adjacent outer inner stator ring.
4. The inner and outer stator structures according to claim 1 are characterized in that: The outer circumferential end of the inner inner stator ring is fixedly connected to the inner circumferential end of the adjacent outer inner stator ring.
5. The inner and outer stator structures according to claim 1, characterized in that: The outer stator ring includes a plurality of outer stator blocks, and the plurality of outer stator blocks are fixedly connected to form the outer stator ring.
6. The inner and outer stator structures according to claim 5, characterized in that: Inter-external stator block gaps are provided between adjacent external stator blocks, and a plurality of external stator block gaps are respectively connected to a plurality of external stator supplementary blocks and an insulating fixing block.
7. The inner and outer stator structures according to claim 6, characterized in that: The outer stator block is fixedly connected to its adjacent outer stator supplementary block.
8. The inner and outer stator structures according to claim 5, characterized in that: The outer stator block includes a first outer stator block and a second outer stator block. The first outer stator block and the second outer stator block are located at two ends of the winding. The first outer stator block and the second outer stator block are fixedly connected to the winding.
9. The inner and outer stator structures according to claim 5, characterized in that: The two ends of the inner stator ring are connected with inner stator pressure plates, the two ends of the outer stator ring are connected with outer stator pressure plates, and the inner stator pressure plates and the outer stator pressure plates are fixed by stator connecting plates.
10. A linear compressor, characterized in that: It comprises the inner and outer stator structures as described in any one of claims 1 to 9 above, wherein a mover is provided in the inner and outer stator structures, and the mover moves linearly by electromagnetic principle, and also comprises a compression part, and the compression part is driven by the mover.