Compressor housing, compressor and air conditioning device
By setting a recessed clearance surface inside the compressor housing, the problem of increased housing size caused by electrical safety distance is solved, enabling the compressor to be miniaturized and lightweight, meeting electrical safety standards, and improving the product's adaptability in compact spaces.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG MEIZHI PRECISION MFG
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-14
AI Technical Summary
In existing compressor designs, in order to meet electrical safety standards, the required distance between the stator winding and the inner wall of the casing increases the radial dimension of the casing, making it difficult to miniaturize the compressor.
A recessed clearance surface is provided inside the compressor housing to create a significant radial distance between the stator winding ends and the inner wall of the housing. By providing a recessed clearance surface locally on the inner wall of the housing, the electrical safety distance is ensured to meet the standard without increasing the radial dimension of the housing.
Without increasing the radial dimensions of the housing, the electrical creepage distance and air gap between the winding ends and the housing are improved, meeting electrical safety standards, enabling the miniaturization and lightweight design of the compressor, and enhancing the product's adaptability and competitiveness in compact spaces.
Smart Images
Figure CN224496705U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of compressor technology, and in particular to a compressor housing, a compressor, and an air conditioning device. Background Technology
[0002] In compressor design, to ensure electrical safety, a certain distance must be maintained between the stator winding and the inner wall of the casing to meet the necessary electrical safety standards. However, this will increase the overall size of the compressor casing, which is not conducive to the miniaturization of the compressor. Utility Model Content
[0003] The main purpose of this utility model is to propose a compressor housing, a compressor, and an air conditioning device. The design aims to avoid the stator winding end by using a concave relief surface, so that the distance between the two can meet electrical safety standards, thereby avoiding excessive increase in the radial dimension of the housing and facilitating the miniaturization design of the compressor.
[0004] To achieve the above objectives, the compressor housing proposed in this utility model includes a first housing portion, an inner peripheral side of which forms a receiving space, and an inner peripheral surface of the first housing portion including a stator mounting surface and a clearance surface distributed sequentially along the axial direction. The stator mounting surface is used for fixing the stator, and the clearance surface is recessed relative to the stator mounting surface and configured to allow the winding ends of the stator to face each other.
[0005] In one embodiment, a stepped structure is formed at the connection between the stator mounting surface and the clearance surface.
[0006] In one embodiment, the inner diameter of the first housing portion at the stator mounting surface is D1, and the inner diameter of the first housing portion at the clearance surface is D2, wherein D1 and D2 satisfy: D1-D2≥1mm.
[0007] In one embodiment, D1 and D2 satisfy: 1mm ≤ D1 - D2 ≤ 3mm.
[0008] In one embodiment, the housing further includes a second housing portion, the first housing portion and the second housing portion being distributed sequentially along the axial direction, the first housing portion having a first end and a second end opposite to each other in the axial direction, the first end having an opening, the outer peripheral surface of the first end being recessed to form a positioning step, and the second housing portion covering the first end at the position of the positioning step.
[0009] In one embodiment, the positioning step includes a first step surface extending axially, and the height H1 of the first step surface in the axial direction satisfies: 3mm≤H1≤5mm.
[0010] In one embodiment, the positioning step includes a second step surface extending radially, the radial width d of the second step surface satisfying: 0.05mm≤d≤0.25mm.
[0011] In one embodiment, the housing further includes a third shell portion, and the second end is also provided with an opening, the third shell portion covering the second end.
[0012] This utility model also proposes a compressor, including the aforementioned housing and a stator installed in the receiving space. The stator includes an iron core and a winding wound around the iron core. The stator is fixed to the stator mounting surface. The portion of the winding extending out of the iron core is the winding end, and the winding end is opposite to the clearance surface.
[0013] In one embodiment, the iron core has a projection falling on the clearance surface, and the axial height H2 of the projection satisfies: 0.5mm≤H2≤2mm.
[0014] This utility model also proposes an air conditioning device, including the aforementioned compressor.
[0015] In this invention, the recessed clearance surface relative to the stator mounting surface significantly increases the radial distance between the inner wall of the first housing and the winding end in this area. This structural design effectively improves the electrical creepage distance and air gap between the winding end and the first housing without increasing the radial dimension of the housing, thus making it easier to meet relevant electrical safety standards (such as IEC and UL requirements for insulation distance). In other words, by locally providing a recessed clearance surface on the inner wall of the first housing, spatial clearance for the winding end is achieved, avoiding the limitations of traditional designs that necessitate a significant increase in the radial dimension of the housing due to insufficient electrical safety distance. This invention cleverly utilizes structural optimization to effectively control the overall size of the compressor while ensuring electrical safety performance. It is particularly beneficial for achieving the design goals of miniaturization and lightweighting of the compressor, enhancing the product's adaptability and competitiveness in compact space applications. Attached Figure Description
[0016] 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.
[0017] Figure 1 A schematic diagram of the structure of an embodiment of the compressor provided by this utility model;
[0018] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;
[0019] Figure 3 A schematic diagram of the structure of the first shell portion of the compressor housing provided by this utility model;
[0020] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;
[0021] Figure 5 A schematic diagram of the structure of the first shell portion of the compressor housing provided by this utility model from another perspective.
[0022] Explanation of icon numbers:
[0023] 10. Housing; 20. Stator; 21. Core; 22. Winding end;
[0024] 100, First shell portion; 101, First end; 102, Second end; 110, Receiving space; 120, Stator mounting surface; 130, Clearance surface; 140, Connecting surface; 150, Positioning step; 151, First step surface; 152, Second step surface;
[0025] 200, Second shell section; 300, Third shell section.
[0026] 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
[0027] 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.
[0028] 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.
[0029] 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.
[0030] This utility model proposes a compressor housing.
[0031] Please see Figures 1 to 5 In one embodiment of the present invention, the housing 10 of the compressor includes a first housing portion 100, and a receiving space 110 is formed on the inner peripheral side of the first housing portion 100. The inner peripheral surface of the first housing portion 100 includes a stator mounting surface 120 and a clearance surface 130 distributed sequentially along the axial direction. The stator mounting surface 120 is used for fixing the stator, and the clearance surface 130 is recessed relative to the stator mounting surface 120 and is configured to be opposite to the winding end 22 of the stator.
[0032] It should be noted that the axial direction refers to the extension direction of the central axis. This central axis is not only the central axis of the housing 10, but also the central axis of the stator and rotor structures. The radial direction mentioned later is the direction perpendicular or approximately perpendicular to this axial direction. Both the stator mounting surface 120 and the clearance surface 130 are circumferentially closed structures, equivalent to cylindrical surfaces around the central axis. It can be understood that the direction in which the clearance surface 130 is recessed relative to the stator mounting surface 120 is away from the central axis.
[0033] The stator includes an iron core 21 and a winding wound on the iron core 21. The winding has an end that extends out of the iron core 21, that is, the winding end 22 is axially protruding relative to the end face of the iron core 21. Specifically, the stator is fixed to the stator mounting surface 120 by laser welding or heat fitting. After the stator is fixed, the stator mounting surface 120 and the iron core 21 of the stator are opposite each other, the winding end 22 will be opposite to the clearance surface 130, and the end face of the iron core 21 will be opposite to the connection position of the stator mounting surface 120 and the clearance surface 130, or even beyond the connection position, and opposite to the clearance surface 130.
[0034] In this invention, the recessed clearance surface 130 relative to the stator mounting surface 120 significantly increases the radial distance between the inner wall of the first housing portion 100 and the winding end 22 in this area. This structural design effectively improves the electrical creepage distance and air gap between the winding end 22 and the first housing portion 100 without increasing the radial dimension of the housing 10, thus making it easier to meet relevant electrical safety standards (such as IEC and UL requirements for insulation distance). In other words, by partially providing a recessed clearance surface 130 on the inner wall of the first housing portion 100, spatial clearance for the winding end 22 is achieved, avoiding the limitations of traditional designs that necessitate a significant increase in the radial dimension of the housing 10 due to insufficient electrical safety distance. This invention cleverly utilizes structural optimization to effectively control the overall volume of the compressor while ensuring electrical safety performance, which is particularly beneficial for achieving the design goals of miniaturization and lightweighting of the compressor, enhancing the product's adaptability and competitiveness in compact space applications.
[0035] In one implementation, please refer to Figure 3 and Figure 4 The stator mounting surface 120 and the clearance surface 130 form a stepped structure at their connection. It can be understood that the stator mounting surface 120 and the clearance surface 130 are connected by a connecting surface 140. In this embodiment, the connecting surface 140 is a plane perpendicular or approximately perpendicular to the central axis, thus forming a stepped structure at the connection between the stator mounting surface 120 and the clearance surface 130. In other embodiments, the connecting surface 140 between the stator mounting surface 120 and the clearance surface 130 can also be an inclined surface or a curved surface.
[0036] In one implementation, please refer to Figure 3 The inner diameter of the first housing portion 100 at the stator mounting surface 120 is D1, and the inner diameter of the first housing portion 100 at the clearance surface 130 is D2. D1 and D2 satisfy: D1-D2≥1mm. It can be understood that since the clearance surface 130 is recessed relative to the stator mounting surface 120, this diameter difference (D1-D2) directly determines the recess depth of the clearance surface 130. Specifically, the radial inward concavity distance of the clearance surface 130 relative to the stator mounting surface 120 is 0.5(D1-D2). Therefore, by reasonably controlling the difference between D1 and D2, the degree of concavity of the clearance surface 130 can be precisely controlled. In this embodiment, the radial concavity distance of the clearance surface 130 relative to the stator mounting surface 120 will be greater than or equal to 0.5mm, ensuring that at the position corresponding to the clearance surface 130, the inner circumference of the first housing 100 has sufficient space to accommodate the stator winding end 22, thereby ensuring that the radial distance between the winding end 22 and the clearance surface 130 can meet the requirements of electrical safety standards, so as to ensure the performance of the compressor.
[0037] Furthermore, D1 and D2 satisfy: 1mm ≤ D1 - D2 ≤ 3mm. Correspondingly, the radial concave distance of the clearance surface 130 relative to the stator mounting surface 120 will be greater than or equal to 0.5mm and less than or equal to 1.5mm. This concave distance can effectively avoid the risk of corona discharge, partial discharge or short circuit caused by the excessive distance between the winding end 22 and the inner wall surface of the first housing 100, and will not excessively weaken the structural strength of the first housing 100 at the location of the clearance surface 130 or increase unnecessary processing difficulty due to excessive concavity.
[0038] Of course, in other embodiments, provided that the relevant requirements are met, the value of (D1-D2) can also be less than 1 mm, such as 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, etc., or it can be greater than 3 mm, such as 3.2 mm, 3.5 mm, 3.8 mm, 4 mm, etc.
[0039] In one implementation, please refer to Figure 1 The housing 10 further includes a second housing portion 200. The first housing portion 100 and the second housing portion 200 are sequentially distributed along the axial direction. The first housing portion 100 has a first end 101 and a second end 102 that are axially opposite each other. The first end 101 is provided with an opening, and the outer peripheral surface of the first end 101 is recessed to form a positioning step 150. The second housing portion 200 is fitted over the first end 101 at the position of the positioning step 150. In this way, the positioning step 150 can provide a positioning function for the assembly of the first housing portion 100 and the second housing portion 200. Specifically, when assembling the first housing portion 100 and the second housing portion 200, the second housing portion 200 is fitted axially onto the mounting step of the first housing portion 100 and pushed axially until the second housing portion 200 and the first housing portion 100 are installed in place. In this process, the mounting step plays an auxiliary role in radial alignment and improves the overall assembly accuracy. Since the positioning step 150 is located on the outer periphery of the second shell 200 (i.e., in the visible area outside the shell 10), during the assembly process, operators or automated equipment can visually, tactilely, or use auxiliary measuring tools to detect the relative position between the second shell 200 and the axial support surface of the mounting step, intuitively determine whether the second shell 200 has been pushed into place, thereby effectively confirming whether the assembly is in place, avoiding assembly defects such as loose connection, misalignment, or lack of locking, and significantly improving assembly efficiency and reliability.
[0040] Please refer to Figure 3 and Figure 4The positioning step 150 includes a first step surface 151 extending axially and a second step surface 152 extending radially, the first step surface 151 and the second step surface 152 being connected. Further, a step structure is also formed on the inner circumferential side of the second shell portion 200, the step structure having two step surfaces located on the inner circumferential side of the second shell portion 200. After the first shell portion 100 and the second shell portion 200 are assembled in place, one step surface of the second shell portion 200 abuts against the first step surface 151, and the other step surface abuts against the end face of the first shell portion 100. The end face of the second shell portion 200 can abut against the second step surface 152, or it can be spaced apart from the second step surface 152. The axial alignment of the first shell portion 100 and the second shell portion 200 can be determined by whether the distance between the end face of the second shell portion 200 and the second step surface 152 is uniform in the circumferential direction, thus avoiding tilting between them.
[0041] Further, please refer to Figure 4 The axial height H1 of the first stepped surface 151 satisfies 3mm ≤ H1 ≤ 5mm to provide sufficient contact area and ensure the connection stability of the first shell 100 and the second shell 200. In other embodiments, provided that relevant requirements are met, H1 can also be less than 3mm, where H1 can be 2mm or 2.5mm, etc. Of course, H1 can also be greater than 5mm, where H1 can be 5.5mm, 6mm, 6.5mm, 7mm, etc.
[0042] Further, please refer to Figure 4 The radial width d of the second step surface 152 satisfies: 0.05mm ≤ d ≤ 0.25mm, to improve the positioning effect. In other embodiments, provided that relevant requirements are met, d can also be less than 0.05mm, where d can be 0.02mm, 0.03mm, or 0.04mm, etc. Of course, d can also be greater than 0.25mm, where d can be 0.3mm, 0.35mm, 0.4mm, etc.
[0043] In one implementation, please refer to Figure 1 The housing 10 further includes a third housing portion 300, and the second end 102 also has an opening, with the third housing portion 300 covering the second end 102. Specifically, the first housing portion 100 has openings on both axial sides, and the second housing portion 200 and the third housing portion 300 each cover one opening, thereby forming a closed receiving space 110 for stable installation of the internal structure. In other embodiments, the first housing portion 100 may have an opening only on one axial side, covered by the second housing portion 200, without the third housing portion 300.
[0044] Specifically, the second shell 200 and the third shell 300 are connected to the first shell 100 by welding, such as laser welding or argon arc welding. This ensures a reliable connection between the shells and guarantees the structural stability of the shell 10.
[0045] This utility model also proposes a compressor, including the aforementioned housing 10 and a stator installed in the receiving space 110. The stator includes an iron core 21 and a winding wound around the iron core 21. The stator is fixed to the stator mounting surface 120. The portion of the winding extending out of the iron core 21 is the winding end 22, and the winding end 22 is opposite to the clearance surface 130. This compressor adopts all the technical solutions of all the above embodiments, and therefore 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.
[0046] In one implementation, please refer to Figure 2 The iron core 21 has a projection falling on the avoidance surface 130 (corresponding to) Figure 2 (For the medium-thickness portion), the axial height H2 of the projection satisfies: 0.5mm ≤ H2 ≤ 2mm. That is, the end face of the core 21 is higher than the connecting surface 140 by a certain distance, which is H2. This ensures that the end face of the core 21 is opposite to the clearance surface 130, thus guaranteeing that the winding end 22 and the clearance surface 130 are opposite. Of course, in other embodiments, the end face of the core 21 can also be flush with the connecting surface 140.
[0047] This utility model also proposes an air conditioning device, which includes a compressor. The specific structure of the compressor housing is as described in the above embodiments. Since the air conditioning 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.
[0048] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection 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 scope of protection of the present utility model.
Claims
1. A compressor housing, characterized in that, The housing includes a first housing portion, the inner circumferential side of which forms a receiving space. The inner circumferential surface of the first housing portion includes a stator mounting surface and a clearance surface distributed sequentially along the axial direction. The stator mounting surface is used for fixing the stator, and the clearance surface is recessed relative to the stator mounting surface and configured to allow the winding ends of the stator to face each other.
2. The compressor housing as described in claim 1, characterized in that, The connection between the stator mounting surface and the clearance surface forms a stepped structure.
3. The compressor housing as described in claim 1, characterized in that, The inner diameter of the first housing portion at the stator mounting surface is D1, and the inner diameter of the first housing portion at the clearance surface is D2. D1 and D2 satisfy: D1-D2≥1mm.
4. The compressor housing as described in claim 3, characterized in that, The condition D1 and D2 satisfy the following: 1mm ≤ D1 - D2 ≤ 3mm.
5. The housing of the compressor as described in any one of claims 1 to 4, characterized in that, The housing further includes a second housing portion. The first housing portion and the second housing portion are distributed sequentially along the axial direction. The first housing portion has a first end and a second end that are opposite each other in the axial direction. The first end is provided with an opening. The outer peripheral surface of the first end is recessed to form a positioning step. The second housing portion covers the first end at the position of the positioning step.
6. The compressor housing as described in claim 5, characterized in that, The positioning step includes a first step surface extending along the axial direction, and the height H1 of the first step surface in the axial direction satisfies: 3mm≤H1≤5mm; And / or, the positioning step includes a second step surface extending radially, the radial width d of the second step surface satisfying: 0.05mm≤d≤0.25mm.
7. The compressor housing as described in claim 5, characterized in that, The housing also includes a third shell portion, and the second end is also provided with an opening, with the third shell portion covering the second end.
8. A compressor, characterized in that, The compressor includes a housing as described in any one of claims 1 to 7 and a stator mounted in the receiving space. The stator includes an iron core and a winding wound around the iron core. The stator is fixed to the stator mounting surface. The portion of the winding extending out of the iron core is the winding end, and the winding end is opposite to the clearance surface.
9. The compressor as claimed in claim 8, characterized in that, The iron core has a projection falling on the clearance surface, and the axial height H2 of the projection satisfies: 0.5mm≤H2≤2mm.
10. An air conditioning device, characterized in that, Includes the compressor described in claim 8 or 9.