Compressor and refrigeration apparatus

Abstract

The utility model discloses a kind of compressor and refrigeration equipment, it is related to refrigeration equipment technical field, wherein, compressor includes main casing, secondary casing, stator and multiple fixing pieces, secondary casing is installed in main casing interior, and the inner peripheral wall of secondary casing is spaced apart and is provided with multiple installation grooves along its circumferential direction;Stator is located in secondary casing interior, and stator includes stator core, and the outer peripheral wall of stator core is gap fit between the inner peripheral wall of secondary casing, and the material of stator core is amorphous alloy material;Multiple fixing pieces are set up one by one with installation groove, and are partially contained in installation groove, and fixing piece is under the action of fastener and abuts stator core.The technical scheme provided by the utility model is gap fit between secondary casing and stator core, and abuts stator core under the action of fastener by fixing piece, reduces the extrusion to amorphous alloy stator core, to be favorable to solve the problem that amorphous alloy stator core is easily extruded damage and leads to energy efficiency loss in the application of compressor.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a compressor and refrigeration equipment. Background Technology

[0002] With the improvement of people's living standards and the introduction of dual-carbon goals, the requirements for the energy efficiency of air conditioner compressors are becoming increasingly stringent. Due to the high resistivity of amorphous materials, using them to make the stator core significantly reduces eddy current losses, greatly improving motor energy efficiency. However, for compressor motors, the motor needs to be interference-fitted with the compressor housing. The compression of the amorphous stator core by the housing severely affects its performance, making it difficult to improve compressor energy efficiency. Utility Model Content

[0003] The main purpose of this invention is to provide a compressor and refrigeration equipment that aims to improve the energy efficiency of the compressor.

[0004] To achieve the above objectives, the compressor proposed in this utility model includes: main housing; A secondary housing is installed inside the main housing, and the inner peripheral wall of the secondary housing is provided with a plurality of mounting grooves spaced apart along its circumference; A stator, disposed inside the sub-housing, includes a stator core, the outer peripheral wall of the stator core being clearance-fitted with the inner peripheral wall of the sub-housing, and the stator core being made of an amorphous alloy material; and Multiple fasteners are provided, each corresponding to a mounting slot. A portion of each fastener is accommodated within a mounting slot, and the fastener abuts against the stator core under the action of fasteners.

[0005] In one embodiment, the outer peripheral wall of the stator core is provided with a positioning groove corresponding to the mounting groove, and the fixing member is inserted into the positioning groove and abuts against the bottom of the positioning groove.

[0006] In one embodiment, the thickness of the fastener in the radial direction of the sub-housing is h3, the outer peripheral wall of the stator core has an abutment surface corresponding to the mounting groove for the fastener to abut, and the distance between the bottom of the mounting groove and the abutment surface is h4, where h3 and h4 satisfy: 0.8≤h3 / h4≤0.94.

[0007] In one embodiment, the maximum width of the fastener in the circumferential direction of the sub-housing is W1, and the maximum width of the positioning groove or the mounting groove in its circumferential direction is W2, wherein W1 and W2 satisfy: 0.9≤W1 / W2≤0.96.

[0008] In one embodiment, the stator core includes a stator yoke and stator teeth. A plurality of stator teeth are spaced apart along the inner circumference of the stator yoke. Each stator tooth includes a parallel tooth portion and a tooth shoe portion. One end of the parallel tooth portion is connected to the stator yoke, and the other end is connected to the tooth shoe portion. The width of the parallel tooth portion in the circumferential direction of the stator core is W. c The width of the stator yoke in the radial direction of the stator core is W. e The maximum width of the positioning groove in its circumferential direction is W2, and the depth of the positioning groove is h5. c W e W2 and h5 satisfy: 0.55 ≤ W2 / W c ≤0.8, 0.3≤h5 / W e ≤0.6.

[0009] In one embodiment, both axial end faces of the stator core are located between the two axial end faces of the sub-casing.

[0010] In one embodiment, the distance between the two end faces of the sub-housing in the axial direction is h1, and the distance between the two end faces of the stator core in the axial direction is h2, where h1 and h2 satisfy: 1.1≤h1 / h2≤1.5.

[0011] In one embodiment, the sub-housing housing is further provided with a mounting hole through which the fastener passes. The mounting hole is provided corresponding to the mounting groove and extends through the bottom of the mounting groove and the outer peripheral wall of the sub-housing housing.

[0012] In one embodiment, the compressor further includes a support member and a pump body. The pump body is disposed within the main housing. The support member includes a support portion and a connecting portion that intersect and connect. The connecting portion is connected to the inner peripheral wall of the secondary housing. The support portion abuts against the side of the stator core near the pump body.

[0013] In one embodiment, the connecting portion is connected to the sub-housing by welding or bonding.

[0014] In one embodiment, the secondary housing is fixed to the main housing by a heat-shrink fitting.

[0015] This utility model also proposes a refrigeration device, including the aforementioned compressor.

[0016] The technical solution of this utility model sets a clearance fit between the sub-shell and the stator core, and uses a fixing component to abut against the stator core under the action of fasteners to fix the stator core. This achieves a stable installation of the stator while reducing the compression of the amorphous alloy stator core, fully protecting the integrity of the amorphous alloy material, and ensuring that its low iron loss characteristics are brought into play. This helps to solve the problem of energy efficiency loss caused by the compression damage of amorphous alloy stator core in compressor applications. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the compressor provided by this utility model; Figure 2 A schematic diagram of the assembly of the sub-shell and stator according to one embodiment; Figure 3 for Figure 2 A magnified view of the area after the fasteners and fixtures were removed at point A. Figure 4 This is an assembly diagram of another embodiment of the sub-casing and stator; Figure 5 A schematic diagram of the structure of an embodiment of the motor provided by this utility model; Figure 6 This is a comparison chart of the energy efficiency of the compressors in this application and existing technologies.

[0019] Explanation of icon numbers: 100. Main housing; 200. Secondary housing; 300. Stator core; 400. Fixing component; 500. Fastener; 600. Support component; 700. Pump body; 210. Mounting groove; 220. Mounting hole; 310. Positioning groove; 320. Stator yoke; 330. Stator teeth; 331. Parallel teeth; 332. Gear shoe; 610. Support part; 620. Connecting part.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] This utility model proposes a compressor.

[0025] Please see Figures 1 to 3 In one embodiment of this utility model, the compressor includes a main housing 100, a secondary housing 200, a stator, and a plurality of fixing members 400. The secondary housing 200 is installed inside the main housing 100, and the inner peripheral wall of the secondary housing 200 is provided with a plurality of mounting grooves 210 spaced apart along its circumference. The stator is disposed inside the secondary housing 200 and includes a stator core 300. The outer peripheral wall of the stator core 300 is clearance-fitted with the inner peripheral wall of the secondary housing 200. The stator core 300 is made of amorphous alloy material. The plurality of fixing members 400 are provided one-to-one with the mounting grooves 210 and are partially accommodated in the mounting grooves 210. The fixing members 400 abut against the stator core 300 under the action of fasteners 500.

[0026] Specifically, the main housing 100 serves as the external main structure of the compressor, providing overall support and sealing. The secondary housing 200 is installed inside the main housing 100, serving as the stator mounting structure. Its inner circumferential wall has multiple circumferentially spaced mounting grooves 210 for accommodating fixing components 400. The stator is located inside the secondary housing 200, and its stator core 300 is made of amorphous alloy material. Amorphous alloy materials are special alloy materials whose internal atomic arrangement does not possess a long-range ordered crystal structure. Amorphous alloys have high resistivity; using amorphous materials to make the stator core 300 can significantly reduce eddy current losses, thereby improving motor efficiency. The outer peripheral wall of the stator core 300 and the inner peripheral wall of the secondary housing 200 are in a clearance fit, meaning they do not directly contact each other or have only a small gap. This avoids the direct rigid contact and stress transmission between the main housing 100 and the stator core 300 in traditional interference fits, and also avoids direct compression of the stator core 300 by the secondary housing 200. As a result, the amorphous alloy material is less prone to microcracks or stress distortion during assembly and operation, effectively protecting the brittle stator core 300 and preserving its low eddy current loss characteristics, thus truly realizing its high energy efficiency advantages.

[0027] Multiple fasteners 400 are correspondingly installed in mounting slots 210 on the sub-housing 200. Before the sub-housing 200 and stator are assembled, the fasteners 400 can be partially or fully accommodated in the mounting slots 210. The walls of the mounting slots 210 provide positioning and support for the fasteners 400, facilitating easier operation of the fasteners 400 during assembly. During assembly, fasteners 500 press the fasteners 400 against the stator core 300, causing the fasteners 400 to abut against and press against the stator core 300, thus securing the stator. This securing method achieves reliable stator fixation through local point contact or line contact, avoiding the large-area compression caused by overall interference fit, and maximizing the preservation of the excellent electromagnetic properties of the amorphous alloy material, thereby improving the compressor's energy efficiency.

[0028] Please refer to Table 1 and Figure 6 Table 1 compares the energy efficiency of the compressors in this application and those in the prior art under different operating conditions. Figure 6 This is a comparison chart of the energy efficiency of the compressors in this application and those in the prior art under different operating conditions.

[0029] Table 1: Energy efficiency comparison of the compressors in this application and existing technologies under different operating conditions

[0030] SEER (Seasonal Energy Efficiency Ratio) is an indicator of air conditioner cooling efficiency. It represents the energy efficiency test conditions at 30%, 60%, and 90% of rated speed, indicating the compressor's operating status under different load conditions. Compressor energy efficiency refers to motor efficiency, which is the ratio of output mechanical power to input electrical power. However, the compressor energy efficiency here is a comprehensive energy efficiency index calculated based on SEER, not a traditional efficiency percentage. Therefore, the "%" here should be understood as an energy efficiency rating unit relative to a benchmark or a dimensionless efficiency indicator.

[0031] From Table 1 and Figure 6 As can be seen from the energy efficiency data under different operating conditions, this application achieves reliable assembly by using the secondary housing 200 and the clearance fit design combined with the fixing component 400 for partial fixation, which avoids the amorphous alloy stator core 300 from being crushed and damaged, and allows the low loss characteristics of the amorphous alloy material to be effectively utilized in the entire operating range.

[0032] Specifically, under low-speed operating conditions (SEER 30), the energy efficiency value of this application is 658.50%, which is 2.10 percentage points higher than the 656.40% of the prior art, representing an improvement of approximately 0.32%. Although the absolute value of the improvement is small, it still achieves a positive gain under low-load operating conditions, indicating that the compressor of this invention has better energy utilization efficiency under light loads, which helps to extend the high-efficiency operating time of the compressor under partial loads.

[0033] Under medium-speed operating conditions (SEER 60), the energy efficiency of this application reaches 411.20%, which is 3.60 percentage points higher than the 407.60% of the prior art, representing an improvement of approximately 0.88%. This is the most significant improvement among the three operating conditions. This indicates that under the medium-load conditions where the compressor operates most frequently, the compressor of this invention can more fully utilize the advantages of the low eddy current loss of the amorphous alloy material, effectively reduce core loss, and thus effectively improve motor efficiency, thereby achieving an effective improvement in compressor energy efficiency.

[0034] Under high-speed operating conditions (SEER 90), the energy efficiency of this application is 247.10%, which is better than the 245.30% of the prior art, representing an improvement of 1.80 percentage points, or approximately 0.73%. Despite the increased electromagnetic load and mechanical stress at high speeds, this application still maintains a stable energy efficiency improvement, indicating that its fixing structure is reliable in protecting the integrity of the amorphous alloy stator core 300, and that the material properties have not degraded due to assembly or operating stress.

[0035] The technical solution of this utility model sets the secondary housing 200 and the stator core 300 in a clearance fit, and uses the fixing member 400 to abut against the stator core 300 under the action of the fastener 500 to fix the stator core 300. This achieves a stable installation of the stator while reducing the compression of the amorphous alloy stator core 300, fully protecting the integrity of the amorphous alloy material, and ensuring that its low iron loss characteristics can be brought into play. This helps to solve the problem that the amorphous alloy stator core 300 is easily damaged by compression in compressor applications, resulting in energy efficiency loss.

[0036] In one implementation, please refer to Figure 4 and Figure 5 The stator core 300 has a positioning groove 310 on its outer peripheral wall corresponding to the mounting groove 210. The fixing member 400 is inserted into the positioning groove 310 and abuts against the bottom of the positioning groove 310.

[0037] The stator core 300 has positioning grooves 310 on its outer peripheral wall corresponding to each mounting groove 210, thereby achieving axial positioning and circumferential limiting between the stator core 300 and the fastener 400. This ensures that the fastener 400 can accurately and stably act in the predetermined position during the fastening process, avoiding displacement or misalignment. By inserting the fastener 400 into the positioning groove 310 on the stator core 300 and abutting against the bottom of the groove, a clear force fulcrum is formed. The preload applied by the fastener 500 can be evenly transmitted to the fastener 400. The fastener 400 abuts against the bottom of the positioning groove 310, so that the preload can be evenly applied to the bottom surface of the positioning groove 310. The force-bearing area of ​​the bottom surface of the groove is large and the pressure is small, effectively preventing the amorphous alloy material from cracking or deforming due to point contact or edge extrusion. Meanwhile, the mating structure of the positioning groove 310 and the fixing member 400 enhances the overall structural rigidity of the stator within the sub-housing 200, suppresses vibrations and displacements that may occur during motor operation, improves the stability of the rotating magnetic field, and helps reduce additional mechanical losses and electromagnetic noise.

[0038] In one implementation, please refer to Figures 2 to 4 The thickness of the fastener 400 in the radial direction of the sub-housing 200 is h3. The outer peripheral wall of the stator core 300 has an abutment surface for the fastener 400 to abut against the mounting groove 210. The distance between the bottom of the mounting groove 210 and the abutment surface is h4. h3 and h4 satisfy: 0.8≤h3 / h4≤0.94.

[0039] By limiting the range of the h3 / h4 ratio, the fastener 400 can be installed within the mounting slot 210, while simultaneously restricting its range of motion. This ensures that the fastener 400 can effectively transmit preload during assembly, allowing it to firmly abut against the contact surface of the stator core 300, thus achieving stable stator fixation and preventing circumferential sliding or axial movement during operation. When h3 is too small (i.e., h3 / h4 < 0.4), the fastener 400 may not fully contact the contact surface, resulting in insufficient preload and an unstable stator fixation, affecting the motor's operational stability. Conversely, when h3 is too large (i.e., h3 / h4 > 0.47), the fastener 400 protrudes excessively radially, potentially applying excessive local pressure to the amorphous alloy stator core 300 during assembly. This could lead to microcracks or stress concentration in the brittle material, increasing iron loss, raising temperature, and even causing premature failure, thus diminishing the energy efficiency advantages of amorphous materials. By controlling h3 / h4 between 0.8 and 0.94, it is ensured that the fastener 400 has sufficient structural strength and load-bearing capacity, while avoiding the deterioration of the amorphous alloy performance due to excessive extrusion, thus maximizing its excellent electromagnetic characteristics with low eddy current loss.

[0040] The measurement method for h3 is as follows: Place the fastener 400 flat on the measuring platform and measure its maximum thickness in the radial direction using an outside micrometer or optical profilometer. The measurement position is located at the middle section to avoid interference from edge flash. The measurement method for h4 is as follows: Measure the radial distance between the bottom of the mounting slot 210 and the abutment surface of the stator core 300 using a coordinate measuring machine or a special inspection tool. It is necessary to ensure that the relative position of the stator and the sub-housing 200 simulates the actual assembly state to obtain accurate functional dimensional data.

[0041] Further explanation is needed regarding the contact surface: In one implementation, please refer to Figure 3 The stator core 300 does not have a positioning groove 310 on its outer peripheral wall. At this time, the contact surface is located on the outer cylindrical surface of the stator core 300. In fact, h4 is the minimum distance from the bottom of the mounting groove 210 to the outer cylindrical surface of the stator core 300.

[0042] In another implementation, please refer to Figure 4 The stator core 300 has a positioning groove 310 on its outer peripheral wall. The contact surface is located at the bottom of the positioning groove 310. In fact, h4 is the distance from the bottom of the mounting groove 210 to the bottom of the positioning groove 310.

[0043] In one implementation, please refer to Figure 5 The maximum width of the fastener 400 in the circumferential direction of the sub-housing 200 is W1, and the maximum width of the positioning groove 310 or the mounting groove 210 in its circumferential direction is W2. W1 and W2 satisfy: 0.9≤W1 / W2≤0.96.

[0044] By controlling the range of the W1 / W2 ratio, a suitable circumferential limiting fit is ensured between the fixing component 400 and the positioning groove 310 or mounting groove 210. When W1 / W2 ≥ 0.9, the fixing component 400 occupies most of the installation space in the circumferential direction, effectively reducing its swaying gap in the positioning groove 310 or mounting groove 210, thereby improving the stator's anti-torsion ability during operation, preventing micro-oscillations caused by vibration or electromagnetic torque fluctuations, and improving the smoothness and reliability of motor operation. At the same time, controlling the upper limit of W1 / W2 to within 0.96 ensures that a certain assembly allowance is still maintained between the fixing component 400 and the groove wall of the positioning groove 310 or mounting groove 210, avoiding assembly difficulties and local stress concentration caused by interference fit. In addition, it is worth mentioning that amorphous alloy materials have high hardness but poor toughness. If the fixing component 400 completely fills the positioning groove 310 in the circumferential direction, it is very easy to be squeezed and deformed or cracked at the edges during the press-fitting process, which would damage the integrity of the stator core 300. Thus, by limiting 0.9≤W1 / W2≤0.96, good limiting performance is ensured while also taking into account assembly feasibility and material safety.

[0045] Measurement method for W1: Use a high-precision image measuring instrument or digital caliper to measure the maximum width W1 along its circumference at the widest point of the fastener 400. The measuring plane should be perpendicular to the axis of the fastener 400, and the measurement should be performed at the middle section to avoid the influence of edge burrs, ensuring that the data reflects the actual assembly dimensions. Measurement method for W2: Use an image measuring instrument with depth measurement function or a small plug gauge to insert into the positioning groove 310 or mounting groove 210 and measure its maximum opening width in the circumferential direction. The measuring plane should be located at the center of the groove to avoid errors caused by the inlet chamfer, ensuring that the value corresponds to the actual assembly space of the fastener 400.

[0046] In one implementation, please refer to Figure 5 The stator core 300 includes a stator yoke 320 and stator teeth 330. Multiple stator teeth 330 are spaced apart along the inner circumference of the stator yoke 320. Each stator tooth 330 includes a parallel tooth portion 331 and a tooth shoe portion 332. One end of the parallel tooth portion 331 is connected to the stator yoke 320, and the other end is connected to the tooth shoe portion 332. The width of the parallel tooth portion 331 in the circumferential direction of the stator core 300 is W. c The width of the stator yoke 320 in the radial direction of the stator core 300 is W. e The maximum width of the positioning groove 310 in its circumferential direction is W2, and the groove depth of the positioning groove 310 is h5. c W e W2 and h5 satisfy: 0.55 ≤ W2 / W c ≤0.8, 0.3≤h5 / W e ≤0.6.

[0047] W2 / W c This reflects the relative size between the circumferential space occupied by the positioning groove 310 and the width of the stator tooth 330. If W2 is too small (i.e., W2 / W...), c If W2 is less than 0.55, the positioning groove 310 will be too narrow, which may cause the fastener 400 to not be fully inserted or to have insufficient contact, resulting in uneven preload transmission and affecting the fixing effect; at the same time, it may also cause cracking of the amorphous material due to local stress concentration. If W2 is too large (i.e., W2 / W...), c If the value is greater than 0.8, the positioning groove 310 is too wide. Due to the high brittleness of the amorphous alloy material, the stator core 300 will form a large stress concentration area in the stator tooth 330 area. Especially under the conditions of high-speed rotation or frequent start-stop of the motor, it is easy to cause fatigue crack propagation or even fracture.

[0048] By controlling 0.55≤W2 / W c With a diameter ≤0.8, the positioning groove 310 is wide enough to accommodate the fixing component 400 and provide sufficient contact area, ensuring that the fixing component 400 can effectively abut against the stator core 300 during tightening, achieving reliable axial clamping and circumferential limiting, and preventing the stator from shifting or loosening during operation. Simultaneously, the width of the positioning groove 310 does not exceed 80% of the width of a single stator tooth 330, thus avoiding excessive weakening of the structural strength around the stator core 300. Furthermore, it maintains the magnetic circuit continuity of the stator core 300, reduces magnetic flux leakage, and avoids increased local magnetic flux density or eddy current losses due to excessively large structural slots, further ensuring the efficient operation of the motor.

[0049] h5 / W e The proportional relationship is used to adjust the depth h5 of the positioning groove 310 and the thickness W of the stator yoke 320. e The matching relationship between them. The stator yoke 320 is an important part that supports the stator teeth 330 and constitutes the main magnetic circuit, and its thickness W e This directly affects the magnetic circuit performance and structural stiffness. If h5 is too small (i.e., h5 / W) e <0.3), the groove depth of positioning slot 310 is too shallow, and the fastener 400 is only slightly pressed in, resulting in limited positioning effect. This may lead to loosening under vibration or thermal expansion conditions, affecting long-term operational stability. If h5 is too large (i.e., h5 / W), e (>0.3) If the depth of the positioning groove 310 is too large, the stator yoke 320 will be significantly reduced in terms of bending and shear resistance due to the electromagnetic force, centrifugal force, and assembly stress. This may lead to deformation or breakage, especially at high speeds. In addition, an excessively deep positioning groove 310 may also disrupt the magnetic circuit path, increase magnetic reluctance, and affect motor efficiency.

[0050] By controlling 0.3≤h5 / W eWith a thickness of ≤0.6, the positioning groove 310 has a certain depth, allowing the fastener 400 to be deeply embedded in the stator core 300, enhancing the contact stability and resistance to disengagement between the fastener 400 and the stator core 300, and improving the overall mechanical reliability of the structure. Simultaneously, the deeper positioning groove 310 also helps to disperse stress during the fastening process, avoiding localized stress on the surface. Furthermore, by limiting the depth of the positioning groove 310 to no more than 60% of the thickness of the stator yoke 320, excessive weakening of the structural strength of the stator yoke 320 is prevented.

[0051] W c Measurement method: Use an optical projector or precision calipers to measure the distance between the two sides of the parallel tooth 331 extending radially. Select at least three different parallel tooth sections 331, and for each parallel tooth section 331, select at least three measurement points at different locations for measurement to avoid the influence of edge defects. Take the average value of the results to ensure that they meet the design tolerance requirements. W e Measurement method: Obtain cross-sectional images of the stator yoke 320 by slicing or 3D scanning. Measure the distance from the outer circle to the center of the stator core 300 under a microscope. Then measure the maximum distance from the bottom of the stator slot to the center of the stator core 300. Calculate the difference between the two values ​​to obtain W. e Alternatively, a special fixture can be used with a dial indicator for non-destructive measurement. The measurement method for h5 is as follows: Using a depth micrometer or laser rangefinder, measure the depth vertically from the outer surface of the stator core 300 to the bottom of the positioning groove 310. During measurement, keep the probe away from the groove wall, select multiple points for measurement, and take the average value to eliminate the influence of machining deviations on the results.

[0052] In one implementation, please refer to Figure 2 The two axial ends of the stator core 300 are located between the two axial ends of the secondary housing 200.

[0053] Both axial end faces of the stator core 300 are located between the axial end faces of the sub-housing 200, completely housing the stator core 300 within the sub-housing 200. The sub-housing 200 provides effective axial protection for the stator core 300, preventing it from being subjected to external mechanical impacts during assembly or operation. This is particularly beneficial for protecting the brittle and environmentally sensitive amorphous alloy stator core 300, ensuring the stability of its electromagnetic performance. Simultaneously, this arrangement enhances the overall structural rigidity of the stator assembly, effectively suppressing axial vibrations and displacements that may occur during high-frequency start-stop or high-speed operation of the motor, thus improving operational smoothness.

[0054] In one implementation, please refer to Figure 2 The distance between the two end faces of the secondary housing 200 in the axial direction is h1, and the distance between the two end faces of the stator core 300 in the axial direction is h2. h1 and h2 satisfy: 1.1≤h1 / h2≤1.5.

[0055] If h1 / h2 is too small, the secondary housing 200 will not be axially flush with or sufficiently aligned with the stator core 300, making it difficult to provide effective protection and prone to stress concentration at the ends due to thermal expansion or vibration. If h1 / h2 is too large, it will not only increase the overall size and weight of the compressor, hindering miniaturization design, but may also affect the assembly coordination of the main housing 100 with other components. Furthermore, an excessively long secondary housing 200 is more prone to deformation or coaxiality deviation during manufacturing, thus reducing assembly quality.

[0056] By controlling 1.1≤h1 / h2≤1.5, the sub-shell 200 is significantly longer than the stator core 300 in the axial direction. This ensures that the entire axial length of the stator core 300 is entirely within the sub-shell 200, providing ample axial coverage space. This enhances the overall integrity and protection of the structure, preventing the ends of the stator core 300 from being exposed and subjected to mechanical damage or environmental influences. Simultaneously, it provides sufficient axial positioning space for the installation of the fastener 400, improving assembly accuracy and connection reliability. Furthermore, it avoids material waste and structural redundancy caused by excessive extension of the sub-shell 200.

[0057] Measurement method for h1: Use a high-precision digital caliper or coordinate measuring machine to measure the straight-line distance between the two end faces along the axis of the sub-housing 200. Ensure the end faces are clean and burr-free during measurement, with the probe perpendicular to the end face. Take the average of multiple measurements to ensure data accuracy. Measurement method for h2: Place the stator core 300 on a flat platform and measure the distance between its two axial end faces using a digital height gauge or outside micrometer. Avoid chamfered areas during measurement. Measure at 3-6 points evenly distributed around the circumference, and take the minimum value as h2.

[0058] In one implementation, please refer to Figure 3 and Figure 4 The sub-shell 200 is also provided with mounting holes 220 through which fasteners 500 pass. The mounting holes 220 are provided corresponding to the mounting groove 210 and penetrate the bottom of the mounting groove 210 and the outer peripheral wall of the sub-shell 200.

[0059] The mounting hole 220 is positioned corresponding to the mounting groove 210 inside the sub-housing 200, with its axis passing through the bottom of the mounting groove 210. This allows fasteners 500 (such as screws or bolts) to be inserted radially or obliquely from outside the sub-housing 200, passing through the mounting hole 220 in sequence and acting on the fixing member 400 located within the mounting groove 210. By tightening the fastener 500, the fixing member 400 is pushed to move towards the stator core 300 within the mounting groove 210 until its inner end face firmly abuts against the bottom of the positioning groove 310 on the outer peripheral wall of the stator core 300, thereby achieving radial compression and circumferential limiting of the stator core 300.

[0060] The design of the mounting hole 220 penetrating the bottom of the mounting groove 210 and the outer peripheral wall of the sub-housing 200 facilitates direct assembly and disassembly of the fastener 500, improving assembly efficiency and maintenance convenience. Secondly, the axial preload of the fastener 500 is precisely transmitted to the fixing component 400 through the mounting hole 220, and then acts on the stator core 300, avoiding the large-area compressive stress caused by traditional interference fits, effectively protecting the brittle amorphous alloy material. Through the coordinated layout of the mounting hole 220 and the mounting groove 210, multiple fixing components 400 are evenly distributed circumferentially, forming a symmetrical multi-point fixing structure, further improving the uniformity of force distribution and vibration resistance of the stator, preventing loosening or displacement caused by electromagnetic force fluctuations or rotational imbalance during motor operation.

[0061] In one implementation, please refer to Figures 1 to 4 The compressor also includes a support member 600 and a pump body 700. The pump body 700 is located inside the main housing 100. The support member 600 includes a support portion 610 and a connecting portion 620 that are intersecting and connected. The connecting portion 620 is connected to the inner peripheral wall of the secondary housing 200. The support portion 610 abuts against the side of the stator core 300 near the pump body 700.

[0062] The compressor also includes a support member 600 and a pump body 700. The pump body 700 is disposed inside the main housing 100 and serves as the core working component of the compressor for gas compression. The support member 600 supports the stator core 300, achieving axial positioning and support for the stator core 300. A connecting portion 620 is fixedly connected to the inner circumferential wall of the secondary housing 200, ensuring reliable assembly between the support member 600 and the secondary housing 200. The support portion 610 extends radially or circumferentially and abuts against the end face (i.e., the axial end face) of the stator core 300 near the pump body 700, thereby applying axial positioning constraints to the stator assembly.

[0063] When the compressor is running, there is an electromagnetic attraction between the stator and rotor, and the pump body 700 also generates axial force during compression. These forces may cause axial displacement or vibration of the stator. By abutting the stator end face with the support part 610, the axial movement of the stator towards the pump body 700 side can be effectively limited, improving the air gap stability between the stator and rotor and avoiding electromagnetic noise, efficiency reduction, or even the risk of rotor rubbing caused by eccentricity or axial movement. At the same time, the connection between the connecting part 620 and the inner wall of the secondary housing 200 transmits the supporting force to the entire structure of the secondary housing 200, and then it is supported by the main housing 100, forming a clear force transmission path and improving the overall structural rigidity.

[0064] In one embodiment, the connecting part 620 is connected to the sub-housing 200 by welding.

[0065] The connecting part 620 and the sub-shell 200 can be firmly bonded to the inner peripheral wall of the connecting part 620 and the sub-shell 200 through precision welding processes such as laser welding, resistance welding, or micro-arc welding, forming a permanent metallurgical connection. This connection method has advantages such as high connection strength, high temperature resistance, and good vibration resistance, and can effectively withstand the mechanical vibration, thermal stress, and electromagnetic force generated by the compressor during long-term operation, ensuring that the support component 600 does not loosen or deform under complex working conditions. At the same time, the welded connection does not require additional fasteners 500, resulting in a compact structure that helps reduce space occupation and improve overall integration.

[0066] In another embodiment, the connecting part 620 is connected to the sub-housing 200 by adhesive bonding.

[0067] The connecting part 620 and the sub-housing 200 can be bonded and fixed to the inner wall of the connecting part 620 and the sub-housing 200 using high-strength structural adhesive. The stress distribution on the bonding surface of the two is uniform, avoiding local thermal deformation or residual stress that may occur during welding. Moreover, the use of a heat-free bonding process helps to prevent changes in the magnetic properties of the stator core 300 due to heat, thereby protecting the overall performance of the motor. In addition, the adhesive layer also has a certain degree of elasticity, which can play a role in vibration damping and cushioning, further improving the smoothness of operation.

[0068] In one embodiment, the secondary housing 200 is fixed to the main housing 100 by means of heat fitting.

[0069] The auxiliary housing 200 is installed inside the main housing 100 by heat fitting. The heat fitting connection process is an important technical means to achieve reliable integration of the multi-layer structure inside the compressor. The basic principle of the heat fitting process is to first heat the auxiliary housing 200 to expand its inner diameter, and then fit it into the inner circumference of the main housing 100 at room temperature. After the auxiliary housing 200 cools and shrinks, a tight interference fit is formed between its inner circumferential wall and the outer circumferential wall of the main housing 100, thereby generating uniform radial pressure and strong bonding force, achieving a firm connection between the two.

[0070] In this way, a high-strength mechanical connection between the secondary housing 200 and the main housing 100 can be achieved without the use of additional screws or welding. The structure is compact and highly reliable, effectively avoiding the risk of structural failure due to loose bolts or cracked welds. Secondly, the interference fit generated by the heat-fitting process has excellent torsional and vibration resistance, and can withstand the complex mechanical stresses generated by the compressor during high-frequency start-stop, high-speed rotation, and load fluctuations, ensuring that the secondary housing 200 maintains positional stability during long-term operation.

[0071] The stress from the heat-fitting process mainly acts on the contact interface between the sub-shell 200 and the main shell 100, while the stator core 300 and the sub-shell 200 are fitted with a clearance fit, and the outer periphery of the stator core 300 does not directly participate in the interference fit. Therefore, the radial compressive stress generated during assembly is effectively isolated by the sub-shell 200 and will not be transmitted to the internal amorphous alloy stator core 300, thereby avoiding the risk of performance degradation or cracking of the amorphous material due to mechanical stress and fully protecting its excellent electromagnetic characteristics with low eddy current loss.

[0072] This utility model also proposes a refrigeration device, which includes a compressor. The specific structure of the compressor is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0073] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A compressor, characterized in that, include: main housing; A secondary housing is installed inside the main housing, and the inner peripheral wall of the secondary housing is provided with a plurality of mounting grooves spaced apart along its circumference; A stator is disposed inside the sub-housing. The stator includes a stator core, and the outer peripheral wall of the stator core is clearance-fitted with the inner peripheral wall of the sub-housing. The stator core is made of an amorphous alloy material. as well as Multiple fasteners are provided, each corresponding to a mounting slot. A portion of each fastener is accommodated within a mounting slot, and the fastener abuts against the stator core under the action of fasteners.

2. The compressor as described in claim 1, characterized in that, The outer peripheral wall of the stator core is provided with a positioning groove corresponding to the mounting groove, and the fixing member is inserted into the positioning groove and abuts against the bottom of the positioning groove.

3. The compressor as described in claim 1 or 2, characterized in that, The thickness of the fastener in the radial direction of the sub-housing is h3. The outer peripheral wall of the stator core has an abutment surface corresponding to the mounting groove for the fastener to abut. The distance between the bottom of the mounting groove and the abutment surface is h4. h3 and h4 satisfy: 0.8≤h3 / h4≤0.

94.

4. The compressor as described in claim 2, characterized in that, The maximum width of the fastener in the circumferential direction of the sub-housing is W1, and the maximum width of the positioning groove or the mounting groove in its circumferential direction is W2. W1 and W2 satisfy: 0.9≤W1 / W2≤0.

96.

5. The compressor as described in claim 4, characterized in that, The stator core includes a stator yoke and stator teeth. A plurality of stator teeth are spaced apart along the inner circumference of the stator yoke. Each stator tooth includes a parallel tooth portion and a tooth shoe portion. One end of the parallel tooth portion is connected to the stator yoke, and the other end is connected to the tooth shoe portion. The width of the parallel tooth portion in the circumferential direction of the stator core is W. c The width of the stator yoke in the radial direction of the stator core is W. e The maximum width of the positioning groove in its circumferential direction is W2, and the depth of the positioning groove is h5. c W e W2 and h5 satisfy: 0.55 ≤ W2 / W c ≤0.8, 0.3≤h5 / W e ≤0.

6.

6. The compressor as claimed in claim 1, characterized in that, Both axial end faces of the stator core are located between the two axial end faces of the secondary housing.

7. The compressor as described in claim 6, characterized in that, The distance between the two end faces of the sub-shell in the axial direction is h1, and the distance between the two end faces of the stator core in the axial direction is h2. h1 and h2 satisfy: 1.1≤h1 / h2≤1.

5.

8. The compressor as claimed in claim 1, characterized in that, The sub-housing also has mounting holes for the fasteners to pass through. The mounting holes are provided corresponding to the mounting groove and penetrate the bottom of the mounting groove and the outer peripheral wall of the sub-housing.

9. The compressor as claimed in claim 1, characterized in that, The compressor also includes a support member and a pump body. The pump body is disposed inside the main housing. The support member includes a support portion and a connecting portion that intersect and connect. The connecting portion is connected to the inner peripheral wall of the secondary housing. The support portion abuts against the side of the stator core near the pump body.

10. The compressor as claimed in claim 9, characterized in that, The connecting part is connected to the sub-shell by welding or bonding.

11. The compressor as claimed in claim 1, characterized in that, The secondary housing is fixed to the main housing by a heat-shrink fitting.

12. A refrigeration device, characterized in that, Includes the compressor as described in any one of claims 1 to 11.

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