Compressor and refrigeration apparatus

Abstract

The embodiment of the utility model provides a kind of compressor and refrigeration equipment, wherein, compressor includes: shell structure, motor cavity and compression cavity are equipped in shell structure along the first direction arrangement;Rack, be in compression cavity, and rack is fixedly connected with shell structure;Multiple compression cylinders, along the first direction of shell structure interval arrangement, one in multiple compression cylinders close to motor cavity is directly connected or indirectly connected with rack, at least one in remaining compression cylinder is fixedly connected with shell structure, and at least two adjacent compression cylinders between can be detachably connected.The technical scheme of the utility model, structure stability, vibration buffering, noise control and assembly convenience are considered, the performance optimization and life extension of multi-cylinder rotary compressor are realized.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to a compressor and a refrigeration device. Background Technology

[0002] Currently, compressor pump assemblies are typically fixed by welding the main bearing to the housing, but this method generates significant noise during operation. Related technologies connect multiple cylinders and weld them to the housing, but due to the excessive rigidity of the overall structure, noise is still produced during operation. Utility Model Content

[0003] The present invention aims to at least solve the technical problem of excessive operating noise in the prior art or related technologies.

[0004] In view of this, an embodiment of the present invention provides a compressor.

[0005] An embodiment of this utility model provides a refrigeration device.

[0006] To achieve the above objectives, embodiments of this utility model provide a compressor, comprising: a housing structure, wherein a motor cavity and a compression cavity are disposed within the housing structure along a first direction; a frame disposed within the compression cavity and fixedly connected to the housing structure; and a plurality of compression cylinders, spaced apart along the first direction of the housing structure, wherein one of the plurality of compression cylinders closest to the motor cavity is directly or indirectly connected to the frame, at least one of the remaining compression cylinders is fixedly connected to the housing structure, and at least two adjacent compression cylinders are detachably connected.

[0007] According to the compressor proposed in this utility model, by rationally arranging the motor cavity and compression cavity inside the outer shell structure, and setting a frame in the compression cavity, combined with the interval arrangement of multi-stage compression cylinders along the first direction, the stability of the compressor structure is improved, vibration and noise are effectively suppressed, assembly and maintenance are simplified, and service life is extended.

[0008] The frame and outer shell structure are fixedly connected, forming a rigid-flexible support foundation that ensures the overall structural stability and a reasonable distribution of rigidity, preventing excessive local rigidity that could lead to vibration transmission and noise. Multiple compression cylinders are spaced apart along the first direction, maximizing space utilization and achieving a rational cascading layout to ensure the continuity and efficiency of the gas compression process. Compression cylinders near the motor cavity are directly or indirectly connected to the frame, ensuring a rigid connection with the rotating bearing components, improving axial stability and positioning accuracy, and reducing relative vibration between moving parts. At least one of the remaining compression cylinders is fixedly connected to the outer shell structure, forming a stable foundation support through welding or other methods, enhancing the overall stability of the intermediate-stage compression cylinders and preventing loosening and deformation caused by long-term vibration. At least two adjacent compression cylinders are detachably connected, ensuring modularity and maintainability of the structure, facilitating assembly, adjustment, and subsequent maintenance, and reducing maintenance difficulty and time costs.

[0009] The overall solution takes into account structural stability, vibration damping, noise control, and ease of assembly, achieving performance optimization and lifespan extension for multi-cylinder rotary compressors.

[0010] In summary, this solution achieves a hierarchical stable structure through the rational arrangement and fixation of the outer shell, frame, and multi-stage compression cylinders. The fixed connection between the frame and the shell, as well as the welding fixation between the intermediate cylinders and the shell, significantly improves the cylinder screw holding force and reduces the risk of long-term loosening. In addition, the elastic connection design between the end cylinders and the frame effectively absorbs vibration, reduces noise transmission, and extends the life of bearings and machinery.

[0011] In some technical solutions, optionally, the compression cylinder includes: a first cylinder and a second cylinder respectively disposed at both ends of the compression chamber along a first direction, the first cylinder being close to the motor chamber; at least one third cylinder disposed between the first cylinder and the second cylinder, the at least one third cylinder being fixedly connected to the outer shell structure, the first cylinder and the third cylinder being detachably connected, and the second cylinder and the third cylinder being detachably connected; wherein, the first cylinder is directly or indirectly connected to the frame.

[0012] In this design, the first cylinder is positioned close to the motor cavity and connected to the frame to ensure the rigidity and positioning accuracy of the end structure. The third cylinder is positioned in the middle and welded to the outer shell structure to form a stable foundation support, significantly improving overall stability. The detachable connection between the first, second, and third cylinders enables modular assembly and convenient maintenance. The overall structure combines rigidity and flexibility, effectively suppressing vibration and noise, extending equipment life, and the structural design is reasonable, making assembly and maintenance simple.

[0013] In some technical solutions, the compressor may optionally include: a rotating shaft extending in a first direction; a first bearing sleeved on the rotating shaft and disposed near the motor cavity; and a second bearing sleeved on the rotating shaft and disposed away from the motor cavity; wherein the first cylinder is in contact with the first bearing, and the first bearing is detachably connected to the frame; or the first cylinder is detachably connected to the frame.

[0014] In this technical solution, the rotating shaft is supported at both ends by a first bearing and a second bearing, ensuring stable rotation of the shaft, reducing mechanical vibration and axial runout, and ensuring smooth mechanical operation. The first cylinder contacts the first bearing, forming a rigid end support structure. The cylinder body assists in bearing positioning, reducing axial deformation and vibration transmission. The first bearing is fixed to the frame via a detachable connection, and the frame is fixedly connected to the outer shell structure, forming a multi-layer rigid support system to ensure overall structural stability and ease of assembly and maintenance. Alternatively, the first cylinder can be directly or indirectly detachably connected to the frame, replacing the bearing-frame connection method, improving structural rigidity and assembly flexibility. This achieves a hierarchical fixed structure that combines rigidity and flexibility, providing both rigid support to ensure mechanical stability and detachable connections for convenient maintenance and adjustment.

[0015] This solution can achieve stable support and positioning of the rotating shaft, reduce vibration and mechanical wear. The first cylinder serves as a rigid end support, assists in bearing positioning, and improves mechanical rigidity. The frame serves as a rigid intermediate connector, ensuring the stability of the overall structure. The multi-layer rigid-flexible structure effectively reduces operating noise and improves the service life of the equipment.

[0016] In some technical solutions, the first cylinder may optionally be elastically connected to the frame.

[0017] In this design, the elastic connection between the first cylinder and the frame creates a hierarchical stable system with rigidity in the middle and flexibility at the ends, which balances structural rigidity, vibration isolation, assembly tolerance, and ease of maintenance, thus achieving comprehensive optimization of compressor performance and durability.

[0018] In some technical solutions, the compressor may optionally include: a welding hole located on the wall of the compression chamber, at least one third cylinder having its outer wall in contact with the wall of the compression chamber, the outer wall of the third cylinder covering the welding hole, and the welding hole enabling the welding of the third cylinder to the outer shell structure.

[0019] In this technical solution, by setting welding holes in the wall of the compression chamber and covering the welding holes with the outer wall of the third cylinder, the third cylinder is firmly welded to the outer shell structure using welding processes such as plug welding. This ensures the high-strength intermediate cylinder is fixed, significantly improving structural stability, effectively dispersing welding stress, reducing the risk of thermal deformation, facilitating automated welding and quality control, improving production efficiency, forming a multi-layered rigid-flexible combined stable support system, and improving the performance and lifespan of the compressor.

[0020] In some technical solutions, the frame may optionally include an inner wall and an outer wall arranged radially, the inner wall being provided with a first connector, and the first cylinder being connected to the frame through the first connector.

[0021] In this technical solution, the frame serves as the connecting hub, with its radial inner wall and outer wall forming a rigid annular structure that supports the cylinder and is tightly integrated with the housing to bear the overall mechanical load. The first connecting piece enables the first cylinder to achieve a rigid-flexible connection with the frame, ensuring structural rigidity while reducing vibration transmission through elastic buffering and improving mechanical performance. The connection is made through the first connecting piece on the inner wall, resulting in a compact structure and standardized assembly, facilitating high-precision positioning and modular design, and improving assembly efficiency and maintenance convenience.

[0022] In some technical solutions, optionally, the frame is provided with a reinforcing rib that protrudes inward along the radial direction, the first connector is provided in the reinforcing rib in the form of a hole, and the first connector extends along the first direction.

[0023] In this technical solution, by providing reinforcing ribs that protrude radially inward on the inner wall of the frame, and by creating a first connecting member with holes extending in a first direction on the reinforcing ribs, a high-strength, accurately positioned, and easily assembled connection between the first cylinder and the frame is achieved. This structural design effectively improves the rigidity and load-bearing capacity of the frame, optimizes the load transmission path, combines dynamic buffering and ease of maintenance, and significantly enhances the overall stability and durability of the compressor.

[0024] In some technical solutions, optionally, the frame is ring-shaped, and there are multiple first connectors, which are spaced apart on the inner wall of the frame.

[0025] In this design, the annular frame is provided with multiple first connectors evenly spaced along the inner wall, providing multi-point, rigid and accurately positioned connection support for the first cylinder. Combined with the design of reinforcing ribs and perforated connectors, the overall rigidity and load-bearing capacity of the frame are significantly improved, vibration control and noise suppression are optimized, and assembly and disassembly are convenient, meeting the structural requirements of high-performance multi-cylinder rotary compressors.

[0026] In some technical solutions, optionally, two adjacent compression cylinders are threaded together, one of the multiple compression cylinders closest to the motor cavity is threadedly connected to the frame, and at least one of the remaining compression cylinders is welded to the outer shell structure.

[0027] In this solution, modular connection is achieved by using threaded connections between adjacent compression cylinders. The cylinder closest to the motor cavity is fixed to the frame by threaded connections, and at least one of the remaining cylinders is fixed to the housing structure by welding. The above solution forms a multi-level support system that combines rigidity and flexibility, which not only ensures the stability and rigidity of the structure, but also takes into account vibration buffering and assembly convenience, significantly improving the performance, reliability and maintenance efficiency of the compressor.

[0028] An embodiment of this utility model provides a refrigeration device, including the aforementioned compressor.

[0029] The refrigeration equipment includes the aforementioned compressor. As the core power and gas compression unit of the refrigeration equipment, the compressor is connected to components such as the condenser, evaporator, and expansion valve of the refrigeration system to form a complete refrigeration cycle.

[0030] Since the refrigeration equipment includes any of the above-mentioned compressors, it has the beneficial effects of any of the above-mentioned compressors, which will not be elaborated here.

[0031] Additional aspects and advantages of this invention will become apparent in the following description or may be learned by practice of this invention. Attached Figure Description

[0032] Figure 1 A schematic diagram of the structure of a compressor according to an embodiment of the present invention is shown;

[0033] Figure 2 A schematic diagram of the structure of a compressor according to an embodiment of the present invention is shown;

[0034] Figure 3 A schematic diagram of the frame structure according to an embodiment of the present invention is shown.

[0035] Wherein, 1: compressor; 11: outer shell structure; 111: motor cavity; 112: compression cavity; 113: welding hole; 12: frame; 121: inner wall; 122: first connecting piece; 123: outer wall; 124: reinforcing rib; 13: compression cylinder; 131: first cylinder; 132: second cylinder; 133: third cylinder; 14: rotating shaft; 15: first bearing; 16: second bearing. Detailed Implementation

[0036] To better understand the above-mentioned objectives, features, and advantages of the embodiments of this utility model, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0038] Multi-cylinder rotary compressors typically face the following problems: insufficient connection stability between multiple compression cylinders, which can easily lead to loose cylinder bolts; excessive rigidity of the overall structure and lack of buffering, resulting in loud operating noise; and increased vibration after long-term operation, which can affect service life.

[0039] Conventional solutions typically employ rigid integral connections or increase the number of fixing points, but these methods have the following drawbacks: increased structural weight and complexity, ineffective solution to vibration transmission problems, and high maintenance and assembly difficulty.

[0040] The following reference Figures 1 to 3 Some embodiments of the present invention are described below.

[0041] like Figure 1 and Figure 2 As shown, this embodiment provides a compressor 1, which rationally arranges the motor cavity 111 and the compression cavity 112 inside the outer shell structure 11, and sets the frame 12 in the compression cavity 112. Combined with the multi-stage compression cylinders 13 arranged at intervals along the first direction, the compressor structure achieves improved stability, effective suppression of vibration and noise, simplified assembly and maintenance, and extended service life.

[0042] The frame 12 is fixedly connected to the outer shell structure 11, forming a rigid-flexible support foundation to ensure the overall structural stability and reasonable rigidity distribution, avoiding excessive local rigidity that could lead to vibration transmission and noise generation. Multiple compression cylinders 13 are spaced apart along the first direction, maximizing space utilization and achieving a reasonable cascaded compression layout, ensuring the continuity and efficiency of the gas compression process. The compression cylinder 13 closest to the motor cavity 111 is directly or indirectly connected to the frame 12, ensuring a rigid connection with the rotating shaft 14, improving axial stability and positioning accuracy, and reducing relative vibration between moving parts. At least one of the remaining compression cylinders 13 is fixedly connected to the outer shell structure 11, forming a stable foundation support through welding or other methods, improving the overall stability of the intermediate-stage compression cylinders 13, and preventing loosening and deformation caused by long-term vibration. At least two adjacent compression cylinders 13 are detachably connected, ensuring modularity and maintainability of the structure, facilitating assembly, adjustment, and subsequent maintenance, and reducing maintenance difficulty and time costs.

[0043] The overall solution takes into account structural stability, vibration damping, noise control, and ease of assembly, achieving performance optimization and lifespan extension for multi-cylinder rotary compressors.

[0044] Specifically, the outer shell structure 11 serves as the overall load-bearing frame of the compressor 1, covering and protecting the internal functional components, bearing internal pressure and external mechanical loads, while providing an installation interface and fixing points.

[0045] The outer shell structure 11 forms a sealed cavity to ensure airtightness during the compression process. Through its fixed connection with the frame 12, it transmits and disperses structural stress, avoiding local stress concentration.

[0046] The outer casing 11 contains a motor cavity 111 and a compression cavity 112 arranged along a first direction. The motor cavity 111 houses the drive motor, providing power input; the compression cavity 112 houses the compression cylinder 13 and related compression mechanisms, completing the gas compression process. Their arrangement along the first direction ensures a smooth power transmission path and a rational spatial layout. The motor cavity 111 and compression cavity 112 are isolated from each other, reducing the impact of motor vibration on the compression mechanism. The axial arrangement optimizes overall compactness and transmission efficiency, and facilitates zoned management of heat dissipation and lubrication.

[0047] The frame 12 is located within the compression chamber 112 and is fixedly connected to the outer shell structure 11. Serving as the load-bearing frame within the compression chamber 112, the frame 12 supports the installation and positioning of the compression cylinder 13 and bearings. The frame 12, through its fixed connection to the outer shell structure 11, forms a double-fixed structure, enhancing overall rigidity and stability. The frame 12 is fixed to the outer shell structure 11 by welding or bolts to ensure no loosening. It can also be designed with elastic buffers to absorb vibration, strengthening the installation reference of the compression cylinder 13, reducing relative movement and deformation. This combination of rigidity and flexibility reduces vibration transmission to the outer shell, decreases noise, supports modular assembly, and improves assembly accuracy and efficiency.

[0048] Multiple compression cylinders 13 are spaced apart along the first direction of the outer shell structure 11 to achieve multi-stage compression, improve compression efficiency and capacity. The spaced arrangement ensures that each compression cylinder 13 has enough space for thermal management, lubrication and mechanical movement. The axial sequence arrangement conforms to the power transmission and gas flow direction of the rotating shaft 14.

[0049] One of the multiple compression cylinders 13, located near the motor cavity 111, is directly or indirectly connected to the frame 12. This cylinder is typically an end cylinder, located near the power input end, and bears a larger mechanical load. Its connection to the frame 12 ensures a rigid connection between the compression cylinder 13 and the rotating shaft 14, which supports the components. Direct connections include, but are not limited to, rigid fixation via screws, keys, or other methods. Indirect connections include, but are not limited to, connections using elastic buffers or transition supports to achieve a degree of flexibility, balancing rigidity and vibration isolation.

[0050] At least one of the remaining compression cylinders 13 is fixedly connected to the outer shell structure 11. This cylinder is an intermediate side cylinder. The fixed connection with the outer shell structure 11 forms a stable foundation support. The non-removable connection method such as welding is used to ensure long-term stability, improve the stability of the intermediate stage compression cylinder 13, effectively prevent screw loosening and cylinder vibration, form a hierarchical stable structure, disperse mechanical stress, reduce structural deformation, and reduce the relative movement of the intermediate cylinder by welding fixation, thereby improving the overall rigidity.

[0051] At least two adjacent compression cylinders 13 are detachably connected. By connecting adjacent cylinders, the overall structure can work collaboratively while retaining the possibility of disassembly and maintenance. Specifically, screw connections, such as M6–M10 grade screws, can be used, ensuring both detachability and reliable fastening. This guarantees mechanical continuity and sealing between cylinders, facilitating the modular design of compressor 1, improving assembly and maintenance efficiency, and allowing for the inspection or replacement of individual cylinders without disassembling the entire device, thus reducing maintenance costs.

[0052] In summary, this solution, through the reasonable arrangement and fixation of the outer shell structure 11, frame 12 and multi-stage compression cylinders 13, and the fixed connection between the frame 12 and the shell, as well as the welding fixation between the intermediate cylinders and the shell, forms a hierarchical stable structure, which significantly improves the cylinder screw holding force and reduces the risk of long-term loosening. In addition, the elastic connection design between the end cylinders and the frame 12 effectively absorbs vibration, reduces noise transmission, and extends the life of bearings and machinery.

[0053] In some embodiments, the compression cylinder 13 may optionally include a first cylinder 131, a second cylinder 132, and at least one third cylinder 133. The first cylinder 131 is located at the end of the compression chamber 112 near the motor chamber 111, serving as an end cylinder. The first cylinder 131 is directly or indirectly connected to the frame 12, and the first cylinder 131 is detachably connected to at least one third cylinder 133. The first cylinder 131 is close to the motor chamber 111 and bears the mechanical load at the power input end. The frame 12 is connected to ensure its positioning accuracy and rigidity, preventing axial and radial vibration. When the first cylinder 131 is indirectly connected, an elastic buffer can be designed between the frame 12 and the first cylinder 131 to reduce vibration transmission and noise.

[0054] The second cylinder 132 serves as the end cylinder at the other end of the compression chamber 112, and is axially opposite to the first cylinder 131. The second cylinder 132 is detachably connected to at least one third cylinder 133. As the axial end cylinder at the other end, the second cylinder 132 cooperates with the first cylinder 131 to form an axial boundary, ensuring the integrity of the compression mechanism. It shares the axial load of the compression structure with the third cylinder 133.

[0055] The third cylinder 133 is located in the middle between the first cylinder 131 and the second cylinder 132. There may be one or more of them. At least one third cylinder 133 is fixedly connected to the outer shell structure 11, usually by welding. The third cylinder 133 is detachably connected to the first cylinder 131 and the second cylinder 132.

[0056] The third cylinder 133 is welded and fixed to the outer shell structure 11 to form a stable intermediate support point, which greatly improves the overall stability and rigidity of the compression mechanism. The intermediate cylinder is fixed by welding to avoid the loosening of screws or structural deformation caused by long-term vibration. The intermediate cylinder serves as a fixed layer, and the end cylinders are connected by screws to form a multi-layered stable system that combines rigidity and flexibility. The detachable end cylinders facilitate assembly and maintenance, and the welding and fixing of the intermediate cylinder ensures the basic stability of the overall structure.

[0057] The first cylinder 131 is directly or indirectly connected to the frame 12. The first cylinder 131 is fixed to the frame 12 by screws or other rigid connectors to ensure the positioning accuracy and rigidity of the end cylinder, support the bearing load, and prevent axial movement and radial sway.

[0058] Indirect connection is achieved through elastic buffer components (such as rubber bushings and spring washers), which absorb vibration and impact, reduce noise, ensure a combination of rigidity and flexibility, extend equipment life, improve the stability of the end cylinder and the bearing support performance, reduce vibration transmission, and improve operational stability.

[0059] The third cylinder 133 is fixedly connected to the outer shell structure 11 by external welding. Optionally, the weld points are evenly distributed (3-6) to ensure a firm connection and uniform stress distribution. The third cylinder 133 can form an intermediate stable reference point, increasing the cylinder screw holding force by more than 40%, reducing the loosening rate by more than 60%, preventing relative displacement and structural fatigue of the intermediate cylinder, and extending service life. Through reasonable distribution of fixed points, local deformation and stress concentration caused by welding are reduced.

[0060] The first cylinder 131 and the third cylinder 133, as well as the second cylinder 132 and the third cylinder 133, are detachably connected using M6–M10 grade 8.8–12.9 screws. Optionally, elastic washers can be added to prevent loosening. This ensures mechanical continuity and sealing between adjacent cylinders, prevents gas leakage, and allows for a modular design that facilitates disassembly, maintenance, and replacement of individual cylinders. It also allows for minor elastic deformation between cylinders, buffering vibrations and reducing stress concentration.

[0061] In summary, this solution ensures the rigidity and positioning accuracy of the end structure by having the first cylinder 131 close to the motor cavity 111 and connected to the frame 12; the third cylinder 133 is set in the middle and welded to the outer shell structure 11 to form a stable foundation support, significantly improving overall stability; the detachable connection between the first cylinder 131, the second cylinder 132 and the third cylinder 133 enables modular assembly and convenient maintenance. The overall structure combines rigidity and flexibility, effectively suppressing vibration and noise, extending equipment life, and the structural design is reasonable, making assembly and maintenance simple.

[0062] In some embodiments, optionally, a rotating shaft 14 is provided, specifically extending along a first direction, serving as the core component for power transmission of the compressor 1. This shaft connects the motor and the compression mechanism, enabling the transmission and conversion of mechanical energy. The axial extension conforms to the overall axial arrangement of the compressor 1, ensuring the shortest power transmission path and highest efficiency. This ensures matching of power input with the compression mechanism, reduces energy loss, and the axial arrangement provides a reasonable spatial layout for multi-stage cylinders, facilitating component installation and maintenance.

[0063] The first bearing 15 is sleeved on the outside of the rotating shaft 14 and is located near the motor cavity 111. The first bearing 15 supports the rotating shaft 14 near the power input end, bears radial and axial loads, ensures the rotational accuracy and stability of the rotating shaft 14, avoids axial sway and radial runout, improves the overall smoothness and reliability of the compressor 1, reduces mechanical vibration and noise, and extends the life of the bearing and related components.

[0064] The second bearing 16 is sleeved outside the rotating shaft 14 and positioned away from the motor cavity 111. The second bearing 16 supports the other end of the rotating shaft 14, bearing radial and axial loads, forming a double-end support for the shaft, ensuring the axial positioning and radial stability of the rotating shaft 14. The second bearing 16 cooperates with the first bearing 15 to jointly ensure the stable operation of the rotating shaft 14, distribute the bearing load, extend the bearing life, and reduce shaft deformation.

[0065] The first cylinder 131 contacts the first bearing 15, making the first cylinder 131 one of the rigid support points of the bearing and the rotating shaft 14. This allows the first cylinder 131 to not only act as a compression mechanism, but also to undertake mechanical positioning and load transmission functions, reduce the vibration amplitude of the bearing and the rotating shaft 14, improve the overall rigidity of the machine, reduce structural gaps through rigid connection, and improve power transmission efficiency.

[0066] The first bearing 15 is fixed to the frame 12 by detachable connectors such as screws to ensure accurate positioning and firm support of the bearing.

[0067] The first cylinder 131 and the frame 12 can also be detachably connected to replace or supplement the connection between the first bearing 15 and the frame 12, so that the first cylinder 131 becomes a rigid connection node of the frame 12, assisting in bearing positioning and support.

[0068] In summary, the rotating shaft 14 is supported at both ends by the first bearing 15 and the second bearing 16, ensuring stable rotation of the shaft, reducing mechanical vibration and axial runout, and ensuring smooth mechanical operation. The first cylinder 131 is in contact with the first bearing 15, forming a rigid end support structure. The cylinder body assists in bearing positioning, reducing axial deformation and vibration transmission. The first bearing 15 is detachably fixed to the frame 12, which is in turn fixedly connected to the outer shell structure 11, forming a multi-layer rigid support system to ensure overall structural stability and ease of assembly and maintenance. Alternatively, the first cylinder 131 can be directly or indirectly detachably connected to the frame 12, replacing the bearing-to-frame 12 connection method, improving structural rigidity and assembly flexibility. This achieves a hierarchical fixed structure that combines rigidity and flexibility, providing both rigid support to ensure mechanical stability and detachable connections for convenient maintenance and adjustment.

[0069] This solution can achieve stable support and positioning of the rotating shaft 14, reduce vibration and mechanical wear. The first cylinder 131 serves as an end rigid support, assists in bearing positioning, and improves mechanical rigidity. The frame 12 serves as an intermediate rigid connector to ensure the stability of the overall structure. The multi-layer rigid-flexible structure effectively reduces operating noise and improves the service life of the equipment.

[0070] In some embodiments, the first cylinder 131 and the frame 12 are optionally flexibly connected by elastic elements (such as elastic bushings, rubber damping pads, spring washers, etc.) instead of being directly connected by traditional rigid bolts. The elastic connection can effectively absorb and isolate the vibration and impact transmitted from the first cylinder 131 to the frame 12 during operation, prevent the vibration from being further transmitted to the outer shell structure 11, reduce the periodic impact and high-frequency vibration generated during the compression process, and significantly reduce the overall machine operating noise.

[0071] The elastic element absorbs part of the mechanical energy, reduces the direct impact between rigid structures, reduces fatigue damage to components such as cylinders and frame 12, and extends the service life of key components such as bearings, cylinders, and frame 12.

[0072] The first cylinder 131 is located at one end of the compression chamber 112, close to the motor chamber 111. The frame 12 is located inside the compression chamber 112 and serves as the supporting base for multiple compression cylinders 13. Elastic connecting parts, such as rubber gaskets and elastic bushings, are located at the connection points between the first cylinder 131 and the frame 12, specifically at the bolt connection points or between the annular support surfaces.

[0073] Due to the effective isolation of high-frequency vibrations by the elastic element, operating noise can be reduced by 3-5 decibels. Vibration transmission is weakened, and the loosening rate of the connection between the cylinder and frame 12 is reduced by more than 60%. Vibration impact is reduced, bearing life can be increased by about 30%, and fatigue damage to the overall structure is reduced.

[0074] In summary, the elastic connection between the first cylinder 131 and the frame 12 creates a hierarchical stable system with intermediate rigidity and end flexibility in the entire compressor structure. This system balances structural rigidity, vibration isolation, assembly tolerance, and ease of maintenance, achieving comprehensive optimization of the compressor 1's performance and durability.

[0075] In some embodiments, the welding holes 113 are optionally provided on the cavity wall of the compression cavity 112, i.e. the inner surface of the outer shell structure 11, and are usually multiple uniformly distributed small holes or openings. The hole diameter, number and distribution are optimized according to the welding strength and structural stress distribution.

[0076] The outer wall 123 of the third cylinder 133 is directly attached to the inner wall of the compression chamber 112, i.e., the chamber wall. The outer wall 123 covers the position of the welding hole 113 to ensure full material contact during welding. The third cylinder 133 is firmly welded to the outer shell structure 11 through the welding hole 113 using processes such as plug welding, spot welding or laser welding.

[0077] The welding hole 113 serves as a connection medium, enabling the third cylinder 133 to be welded and fixed to the outer shell structure 11 with high strength, forming a rigid connection point that cannot be disassembled. This avoids the risk of thermal deformation caused by traditional direct welding. The design of the welding hole 113 is beneficial for controlling heat input and welding stress.

[0078] The third cylinder 133, as an intermediate cylinder, is tightly fixed to the outer shell structure 11 through the welding hole 113, becoming a stable intermediate support point for the entire compression mechanism, effectively resisting the vibration and impact during the operation of the compressor 1, and reducing cylinder screw loosening and structural fatigue.

[0079] With the pre-set welding holes 113, the weld seam is formed uniformly and concentratedly, which makes it easy to achieve tooling positioning and automated welding, reduces welding deformation, and improves welding consistency and reliability.

[0080] Optionally, the diameter of the welding holes 113 is controlled between 3mm and 8mm, and the number is determined according to the cylinder size and stress analysis, usually 3 to 6 evenly distributed.

[0081] Optionally, the welding hole 113 is positioned to avoid the piston stroke area inside the cylinder and the sealing surface, ensuring that sealing and mechanical movement are not affected.

[0082] Optionally, the hole shape can be circular, elliptical, or oblong to facilitate the approach of the welding torch and the formation of the weld. The edges of the hole need to be deburred to ensure welding quality.

[0083] Optionally, the welding process employs plug welding technology, where weld metal fills the holes to form a strong weld joint. Welding heat input is controlled to prevent cylinder deformation and excessive thermal stress. Post-weld non-destructive testing, such as ultrasonic, radiographic, or penetrant testing, is performed to ensure weld quality and that the weld joint is free of cracks, porosity, and incomplete penetration.

[0084] The intermediate cylinder is welded and fixed through welding hole 113 to form a stable rigid foundation. It is detachably connected to the end cylinder by screws to form a hierarchical stable structure. The welding and fixing of the frame 12 and the outer shell structure 11 and the elastic connection of the first cylinder 131 and the frame 12 together construct a multi-level support system that combines rigidity and flexibility, which improves the overall stability and service life of the compressor 1, reduces vibration and noise, and ensures long-term operational reliability.

[0085] In summary, by setting welding holes 113 in the wall of the compression chamber 112 and covering the welding holes 113 with the outer wall 123 of the third cylinder 133, a strong weld is achieved between the third cylinder 133 and the outer shell structure 11 using welding processes such as plug welding. This secures the high-strength intermediate cylinder, significantly improves structural stability, effectively disperses welding stress, reduces the risk of thermal deformation, facilitates automated welding and quality control, improves production efficiency, forms a multi-layered rigid-flexible combined stable support system, and enhances the performance and lifespan of the compressor 1.

[0086] In some embodiments, optionally, such as Figure 3 As shown, the frame 12 has an inner wall 121 and an outer wall 123 arranged in the radial direction. The inner wall 121 faces the direction of the rotation axis 14, and the outer wall 123 faces the inner circumference of the housing. A first connecting member 122 is provided on the inner wall 121 of the frame 12, serving as a connection medium between the first cylinder 131 and the frame 12. The connecting member can be in the form of a screw seat, a connecting lug, a boss, or an elastic support member, etc.

[0087] The first cylinder 131 is connected to the frame 12 via the first connector 122. The connection method can be a rigid connection or an elastic connection (such as an elastic bushing, rubber gasket, etc.). The connector fixes the first cylinder 131 near the inner wall 121 of the frame 12, thereby achieving structural support and positioning.

[0088] The inner wall 121 serves as the support surface and connection reference for the installation of the first cylinder 131, ensuring accurate positioning of the cylinder along the radial direction, providing a rigid base, and bearing the mechanical load transmitted by the cylinder; the outer wall 123 is connected to the inner circumference of the housing by welding or other fixing methods, realizing the rigid fixation of the frame 12 as a whole; forming the basis for the structural rigidity and stability of the frame 12.

[0089] The first connector 122 serves as a connecting bridge between the first cylinder 131 and the frame 12, achieving mechanical fixation between the two. The connector can be designed as an elastic structure (elastic bushing, rubber gasket, etc.) to buffer vibration, or as a rigid structure to ensure positioning accuracy. The connector structure facilitates screw installation, improving assembly efficiency and positioning repeatability. The first connector 122 can transmit the axial and radial loads of the first cylinder 131 to the frame 12, and the frame 12 then transmits the loads to the housing, ensuring the overall structural stability.

[0090] The first cylinder 131 is rigidly supported by the frame 12 through the first connector 12, preventing relative displacement or loosening of the cylinder during operation; if the connector contains an elastic element, it can effectively buffer the vibration generated by the compression cylinder 13 during operation and reduce noise propagation; the first connector 122 makes the connection between the first cylinder 131 and the frame 12 clear and standardized, which is convenient for disassembly and maintenance; the inner wall 121 of the frame 12 serves as the installation reference surface, and together with the first connector 122, ensures the accuracy of the radial and axial positions of the cylinder installation, reducing mechanical errors and vibration.

[0091] In summary, the frame 12 serves as the connecting hub, with its radial inner wall 121 and outer wall 123 forming a rigid annular structure that supports the cylinder and is tightly integrated with the housing, bearing the overall mechanical load. The first connecting piece 122 enables the first cylinder 131 to achieve a rigid-flexible connection with the frame 12, ensuring structural rigidity while reducing vibration transmission through elastic buffering and improving mechanical performance. The connection via the first connecting piece 122 on the inner wall 121 results in a compact structure and standardized assembly, facilitating high-precision positioning and modular design, improving assembly efficiency and maintenance convenience.

[0092] In some embodiments, the reinforcing ribs 124 of the frame 12 are optionally provided to protrude radially inward on the inner wall 121 of the frame 12, that is, to protrude from the inner wall 121 of the frame 12 toward the rotation axis 14 to form the reinforcing ribs 124. The reinforcing ribs 124 serve as a local reinforcement structure for the frame 12, thereby improving the rigidity and load-bearing capacity of the frame 12.

[0093] The first connector 122 is hole-shaped, specifically a round or elliptical hole, and is provided on the reinforcing rib 124. The hole is usually a screw hole or a mounting hole. The hole extends along the first direction, that is, axially. The hole axis is consistent with the direction of the rotating shaft 14, so that screws or connectors can pass through axially. The connection part of the first cylinder 131 is aligned with the hole on the reinforcing rib 124, and the connection is achieved by screws or fasteners passing through the hole.

[0094] The reinforcing rib 124 protrudes radially inward to form a reinforcing rib, which significantly increases the load-bearing capacity of the frame 12 in the radial and axial directions, prevents the frame 12 from undergoing local deformation due to cylinder load, and ensures the stability and durability of the connection parts. As a reinforced channel for load transmission, the reinforcing rib 124 evenly transmits the load from the first cylinder 131 to the main body of the frame 12 and the outer shell structure 11, reducing stress concentration. Through the arrangement of the reinforcing rib 124, the overall structural rigidity of the frame 12 is improved, vibration and deformation are reduced, and mechanical performance is improved.

[0095] The first connector 122 is perforated on the reinforcing rib 124. This perforated connector provides an accurate positioning reference for the installation of the first cylinder 131 and the frame 12, ensuring the relative positional accuracy of the cylinder and the frame 12. The perforated design facilitates the passage of screws or fasteners, enabling a quick and reliable connection. The hole extends along the first direction, supporting axial installation and simplifying the assembly process. The first connector 122 is located on the reinforcing rib 124. Due to the rigid reinforcement of the reinforcing rib 124, the force on the edge of the hole is more even, preventing damage or deformation of the surrounding material due to excessive load.

[0096] The hole axis is in the same direction as the rotating shaft 14, and the screw or connector passes through axially to ensure that the connection force is transmitted axially and effectively support the axial load of the first cylinder 131. The hole-shaped connector design extending in the first direction, together with the radial structure of the frame 12, forms a three-dimensional rigid connection and improves the overall structural stability.

[0097] In addition, the hole size and hole wall can be designed to fit the elastic bushing, providing a certain degree of elastic connection while taking into account both rigid positioning and vibration buffering.

[0098] In summary, by providing reinforcing ribs 124 that protrude radially inward from the inner wall 121 of the frame 12, and by creating a first connecting member 122 with holes extending in the first direction on the reinforcing ribs 124, a high-strength, accurately positioned, and easily assembled connection between the first cylinder 131 and the frame 12 is achieved. This structural design effectively improves the rigidity and load-bearing capacity of the frame 12, optimizes the load transmission path, combines dynamic buffering and ease of maintenance, and significantly enhances the overall stability and durability of the compressor 1.

[0099] In some embodiments, the frame 12 is optionally annular in shape, arranged around the axis of the rotation shaft 14 to form a closed-loop rigid support structure, ensuring the overall rigidity and stability in the radial and circumferential directions; a plurality of first connectors 122 are disposed on the inner wall 121 of the frame 12, and are evenly spaced along the circumferential direction of the frame 12, with a certain distance between the connectors, and are evenly distributed on the inner wall 121 of the frame 12 to form a plurality of rigid mounting points.

[0100] The ring structure provides a closed rigid ring, which enhances the radial and circumferential stiffness of the frame 12, prevents deformation and torsion, and allows the load to be continuously transmitted along the circumferential direction, reducing local stress concentration and improving the durability of the frame 12 and the connecting cylinder. The ring structure serves as the mounting reference surface for the first cylinder 131 and other components, ensuring the positioning accuracy and repeatability of each connecting part.

[0101] The first cylinder 131 and the frame 12 are fixed at multiple points through multiple first connectors 122, which improves the stability and load-bearing capacity of the connection. The load is evenly distributed through multiple connections, avoiding excessive force at a single point that could cause local damage to the connectors or the frame 12. The vibration energy is dispersed through multiple connection points. Combined with the design of elastic connectors, the vibration transmission and noise are effectively reduced.

[0102] The connectors are spaced reasonably, which facilitates the installation and removal of fasteners such as screws, improving assembly efficiency and maintenance convenience.

[0103] The ring frame 12, combined with multi-point connectors, forms a stable and rigid support frame that effectively supports the first cylinder 131 and other compression mechanism components. The multi-point first connectors 122 are evenly spaced to ensure uniform load transfer and vibration dispersion, thereby improving the overall structural durability and operational stability. Combined with the design of reinforcing ribs 124 and perforated first connectors 122, it ensures high-strength connections while also taking into account the convenience of assembly and maintenance, achieving a highly efficient hierarchical structure that combines rigidity and flexibility, and meeting the comprehensive requirements of the multi-cylinder rotary compressor 1 for stability, noise control, and lifespan.

[0104] In general, the annular frame 12 is provided with a plurality of first connectors 122 evenly spaced along the inner wall 121, which provide multi-point, rigid and accurately positioned connection support for the first cylinder 131. Combined with the design of reinforcing ribs 124 and perforated connectors, the overall rigidity and load-bearing capacity of the frame 12 are significantly improved, vibration control and noise suppression are optimized, and assembly and disassembly are convenient, thus meeting the structural requirements of the high-performance multi-cylinder rotary compressor 1.

[0105] In some embodiments, optionally, all adjacent compression cylinders 13 are mechanically connected by threaded fasteners (such as high-strength bolts and nuts). The connection points are the connecting flanges or threaded ends corresponding to the outer walls 123 of the cylinders. Among the multiple compression cylinders 13, the end cylinders near the motor cavity 111 are fixed to the frame 12 by threaded connections. The frame 12 serves as a rigid structure, providing positioning and support for the cylinders. At least one of the remaining compression cylinders 13 is welded to the outer shell structure 11. Cylinders in the middle or other positions are fixed to the outer shell structure 11 by welding, forming a rigid and non-removable connection.

[0106] Threaded connections enable mechanical connection between cylinders and are detachable, facilitating assembly, debugging, and subsequent maintenance. The connection is designed with sealing structures, such as sealing rings and gaskets, to ensure no gas leakage. At the same time, threaded connections allow for slight elastic deformation, which helps to buffer mechanical vibration and reduce structural fatigue.

[0107] The frame 12 is a rigid ring structure. The threaded connection firmly positions the end cylinder and bears the axial load and vibration force. The connection can be designed with elastic buffers, such as elastic bushings and rubber gaskets, to achieve a combination of rigidity and flexibility and reduce vibration transmission.

[0108] By welding, the intermediate cylinder or other cylinders are fixed to the housing structure to form a stable rigid support reference. The welded connection ensures that there is no relative movement between the cylinder and the housing, which greatly improves the cylinder screw holding force and structural rigidity. Rigid welding reduces screw loosening and structural fatigue caused by long-term vibration, and extends the life of compressor 1.

[0109] In summary, the intermediate cylinder forms a rigid fixed foundation with the outer shell through welding, while the end cylinders achieve elastic support through threaded connection to the frame 12. The cylinders are modularly assembled through threaded connection. Rigid welding ensures the stability of the foundation, and the threaded connection, together with the elastic buffer, effectively reduces vibration transmission and noise. The threaded connection facilitates disassembly, while the welded connection ensures stability. The combination of the two takes into account both reliability and maintainability. The above connection scheme improves the stability of the cylinder connection, increases the cylinder screw holding force by more than 40%, reduces the loosening rate by 60%, and extends the bearing life by about 30%.

[0110] Modular connection is achieved by using threaded connections between adjacent compression cylinders 13. The cylinder closest to the motor cavity 111 is fixed to the frame 12 by threaded connection, and at least one of the other cylinders is fixed to the shell structure by welding. This forms a multi-level support system that combines rigidity and flexibility, which not only ensures the stability and rigidity of the structure, but also takes into account vibration buffering and assembly convenience, significantly improving the performance, reliability and maintenance efficiency of the compressor 1.

[0111] Another embodiment of this application provides a refrigeration device including the aforementioned compressor 1. The compressor 1 serves as the core power and gas compression unit of the refrigeration device and is connected to components such as the condenser, evaporator, and expansion valve of the refrigeration system to form a complete refrigeration cycle.

[0112] The multi-cylinder rotary compressor 1 adopts a combination of rigidity and flexibility in structure, which improves the stability of cylinder fixation and reduces the risk of screw loosening; the intermediate cylinder welded and fixed to the frame 12 and the shell provides a stable foundation, and the end cylinders are elastically connected to buffer vibration and reduce operating noise by 3dB–5dB; the bearings and rotating shaft 14 are reasonably supported, extending the bearing life by more than 30% and ensuring long-term stable operation.

[0113] The high-efficiency compressor 1 improves refrigerant compression efficiency and system energy efficiency ratio; reduces equipment noise and vibration, improving user experience; and has a compact structure, facilitating equipment integration and maintenance.

[0114] The refrigeration equipment of this application integrates a multi-cylinder rotary compressor 1 with the above-mentioned optimized structure, realizing a high-efficiency, stable, and low-noise refrigeration compression core, improving the overall performance and service life of the refrigeration system, and is easy to maintain, with broad application prospects.

[0115] This application also provides a specific embodiment of a rotary compressor 1, comprising: a housing portion; an electric motor portion; a rotating shaft 14; a plurality of compression mechanism portions, the compression mechanism body having at least three compression mechanism portions arranged to overlap each other in the axial direction of the rotating shaft 14; partition plates respectively disposed between adjacent compression mechanism portions; a main bearing and a secondary bearing supporting the rotating shaft 14 at both ends of the compression mechanism body along the axial direction of the rotating shaft 14; wherein each compression mechanism portion comprises a compression chamber 112 consisting of a cylinder, a piston, and a vane.

[0116] The housing is equipped with a frame 12 for screw fixing of the compression mechanism, and the frame 12 is fixed to the inner periphery of the housing by external welding.

[0117] The cylinders of the compression mechanism that are in contact with the main bearing and the auxiliary bearing are connected to the cylinders of the compression mechanism on the middle side by screws.

[0118] At least one cylinder of the compression mechanism on the middle side is fixed to the inside of the housing by welding to the outside of the housing.

[0119] The main bearing or the cylinder in contact with the main bearing is connected to the frame 12 inside the housing by screws.

[0120] The number of welding points between the cylinder and the housing in the intermediate side compression mechanism is 3-6.

[0121] The number of compression mechanism parts is 3-5, of which 1-2 intermediate cylinders are externally welded and fixed.

[0122] The frame 12 is a ring structure with reinforcing ribs 124, and its inner circumference is provided with three or more sets of screw connection seats.

[0123] The above structural design improves the overall stability of the compression mechanism by fixing the intermediate cylinders of multiple compression mechanisms to the housing, and by fixing the main bearing or cylinder closer to the motor unit to the frame 12 inside the housing with screws. This significantly increases the cylinder screw holding force. Furthermore, the method of fixing the screws to the frame 12 can provide flexible buffering, reducing compressor noise.

[0124] An improved rotary compressor structure is proposed to address the problems of unstable cylinder fixation and excessive noise in existing technologies. It employs a multi-layered, axially overlapping arrangement of cylinders. The intermediate cylinder (i.e., the third cylinder 133) is externally welded to form a stable foundation. The end cylinders (i.e., the first cylinder 131 and the second cylinder 132) are connected to the intermediate cylinder by screws and are also elastically connected to the frame 12. The frame 12 is externally welded to the inner circumference of the housing (i.e., the outer shell structure 11), forming a double-fixed structure.

[0125] Hybrid fixing method: a combination of welding and screw connection; elastic buffer design: the elastic fixing of the frame provides vibration absorption; hierarchical stabilizing structure: the intermediate welded layer provides basic stability.

[0126] This solution increases cylinder screw holding force by over 40% and reduces loosening rate by 60% after long-term operation. Operating noise is reduced by 3-5 decibels, and high-frequency vibration is significantly reduced.

[0127] Without adding extra weight, the assembly process is simplified, maintenance is convenient, vibration is reduced, bearing life is extended by 30%, and fatigue damage to the overall structure is reduced.

[0128] The housing section (i.e., the outer shell structure) is a cylindrical metal shell with frame welding positions machined on the inner surface. There are at least three compression mechanism sections, optionally three to five. Multiple compression mechanism sections overlap axially, and each compression mechanism section includes: a cylinder, a piston, a sliding vane, and a partition plate.

[0129] The intermediate cylinder is fixed by welding to the outside of the housing, and the end cylinder is connected to the intermediate cylinder by screws, specifically M6-M10 screws. The cylinder on the main bearing side (i.e. the first cylinder) is elastically connected to the frame.

[0130] The frame is a ring structure, externally welded and fixed, with screw connection holes inside.

[0131] During assembly, the frame is first welded and fixed to the inner circumference of the housing; multiple compression components, main and auxiliary bearings, and the crankshaft are aligned and installed to form the pump body. The pump body is then installed to the housing, secured by welding the cylinder of the intermediate compression section, and finally connected and fixed to the frame inside the housing with screws.

[0132] In this invention, the terms "sealed," "fixed," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installed," "connected," "joined," and "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0133] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0134] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0135] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A compressor, characterized in that, include: The outer casing structure includes a motor cavity and a compression cavity arranged along a first direction. A frame is disposed within the compression chamber, and the frame is fixedly connected to the outer shell structure; Multiple compression cylinders are spaced apart along a first direction of the outer shell structure. One of the compression cylinders closest to the motor cavity is directly or indirectly connected to the frame. At least one of the remaining compression cylinders is fixedly connected to the outer shell structure, and at least two adjacent compression cylinders are detachably connected.

2. The compressor according to claim 1, characterized in that, The compression cylinder includes: A first cylinder and a second cylinder are respectively disposed at both ends of the compression chamber along a first direction, with the first cylinder being close to the motor chamber; At least one third cylinder is disposed between the first cylinder and the second cylinder, and at least one third cylinder is fixedly connected to the housing structure. The first cylinder and the third cylinder are detachably connected, and the second cylinder and the third cylinder are detachably connected. The first cylinder is directly or indirectly connected to the frame.

3. The compressor according to claim 2, characterized in that, The compressor also includes: A rotation axis extends along the first direction; A first bearing is sleeved on the outside of the rotating shaft, and the first bearing is located close to the motor cavity; The second bearing is sleeved on the outside of the rotating shaft, and the second bearing is located away from the motor cavity; Wherein, the first cylinder is in contact with the first bearing, and the first bearing is detachably connected to the frame; or the first cylinder is detachably connected to the frame.

4. The compressor according to claim 2, characterized in that, The first cylinder is elastically connected to the frame.

5. The compressor according to claim 4, characterized in that, The compressor also includes: A welding hole is provided in the cavity wall of the compression chamber. The outer wall of at least one of the third cylinders is in contact with the cavity wall of the compression chamber. The outer wall of the third cylinder covers the welding hole, and the welding of the third cylinder to the outer shell structure is achieved through the welding hole.

6. The compressor according to claim 2, characterized in that, The frame includes an inner wall and an outer wall arranged radially. The inner wall is provided with a first connector, and the first cylinder is connected to the frame through the first connector.

7. The compressor according to claim 6, characterized in that, The frame is provided with a reinforcing rib that protrudes inward along the radial direction. The first connector is provided in the reinforcing rib in the form of a hole, and the first connector extends along the first direction.

8. The compressor according to claim 6, characterized in that, The frame is ring-shaped, and there are multiple first connectors, which are spaced apart on the inner wall of the frame.

9. The compressor according to any one of claims 1 to 7, characterized in that, The two adjacent compression cylinders are threaded together, one of the compression cylinders closest to the motor cavity is threadedly connected to the frame, and at least one of the remaining compression cylinders is welded to the outer shell structure.

10. A refrigeration device, characterized in that, Includes the compressor as described in any one of claims 1 to 9.

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