Compression part structure and linear compressor

Abstract

The utility model discloses a compression part structure and a linear compressor, which belong to the technical field of compressors, the compression part structure comprises a cylinder assembly and a piston assembly, the cylinder assembly is sleeved outside the piston assembly, the piston assembly can slide relative to the cylinder assembly, and the cylinder assembly and the piston assembly are integrated. The integrated piston assembly and the integrated air cylinder assembly are coaxially assembled. The utility model further discloses a linear compressor. According to the linear compressor, the integrated piston assembly and the integrated air cylinder assembly are coaxially assembled, coaxial assembly of five parts is reduced to two parts, the assembly requirement is lowered, the coaxial assembly efficiency is improved, meanwhile, the integrated design is more beneficial to batch production and manufacturing, the production efficiency is improved, the axial length of the linear compressor can be reduced, and the production cost is reduced. And miniaturization design of the compressor is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to a compression part structure and a linear compressor. Background Art

[0002] A linear compressor is a piston compressor that applies a linear motor. At present, in the structure of high-power oil-free linear compressors (1 kW or higher), a gas-floating piston, a shaft-supported motor, and a ball head connecting the shaft and the piston are generally used. Although this solution solves the friction problem between the piston and the cylinder, the existence of the ball head universal adjustment and the service life problem of the shaft and the bearing have not been solved and need to be replaced periodically. Due to the existence of the ball head or the universal joint, the solution of the piston gas-floating support motor cannot be realized. If directly assembled, the coaxial assembly of the two ends of the piston, the shaft and the two ends of the cylinder cannot be guaranteed, and the motor gas-floating cannot be realized either.

[0003] Therefore, in order to solve the problems of difficult coaxial assembly of multiple pistons and multiple cylinders and piston gas-floating support for the motor, it is urgent to design a compression part structure and a linear compressor to solve the above-mentioned problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a compression part structure and a linear compressor, which have the advantages of reducing the assembly requirements of the compressor and improving the coaxial assembly efficiency, and solve the problems mentioned in the background art.

[0005] To achieve the above purpose, the specific technical solutions of a compression part structure and a linear compressor of the utility model are as follows:

[0006] A compression part structure includes a cylinder assembly and a piston assembly. The cylinder assembly is sleeved outside the piston assembly, and the piston assembly can slide relative to the cylinder assembly. Both the cylinder assembly and the piston assembly are integrated, and the integrated piston assembly is coaxially assembled with the integrated cylinder assembly.

[0007] Further, the piston assembly includes two pistons and a support shaft. The two pistons are fixedly connected through the support shaft, and the integrated piston assembly is formed by fixedly connecting the two pistons and the support shaft.

[0008] Further, the piston is provided with gas-floating holes.

[0009] Further, the cylinder assembly includes two cylinders. The two cylinders are fixedly connected, and the integrated cylinder assembly is formed by fixedly connecting the two cylinders.

[0010] Further, the cylinder includes a compression chamber and a connection chamber. The compression chamber and the connection chamber are communicated. The two cylinders are communicated through the connection chamber to form a cylinder assembly, and the cylinder is slidably connected with the corresponding piston through the compression chamber.

[0011] Furthermore, intake and exhaust end cover assemblies are respectively connected to the end portions of the compression chambers of the two cylinders.

[0012] A linear compressor includes the above-described compression section structure and also includes a motor section structure. The motor section structure includes a stator assembly and a rotor assembly. The rotor assembly drives the piston assembly to move linearly through electromagnetic principles.

[0013] Furthermore, the rotor assembly includes a connecting bracket. The connecting bracket is fixedly connected to the support shaft. One end of the connecting bracket away from the support shaft is connected with a magnet assembly. The magnet assembly is sleeved outside the piston assembly.

[0014] Furthermore, a sliding groove is provided on the connecting cavity. The connecting bracket passes through the sliding groove and is fixedly connected to the support shaft.

[0015] Furthermore, the stator assembly includes an inner stator and an outer stator. The inner stator is sleeved outside the cylinder assembly, and the outer stator is sleeved outside the inner stator.

[0016] The utility model has the following advantages: By coaxially assembling the integrated piston assembly and the integrated cylinder assembly, the coaxial assembly of 5 parts is reduced to 2 parts, reducing the assembly requirements, improving the coaxial assembly efficiency. At the same time, the integrated design is more conducive to mass production and manufacturing, improving production efficiency, and can reduce the axial length of the linear compressor, which is beneficial to the miniaturized design of the compressor. Description of the Drawings

[0017] Figure 1 It is a schematic cross-sectional structure diagram of the compression section structure of the utility model;

[0018] Figure 2 It is a schematic structure diagram of the integrated piston assembly of the utility model;

[0019] Figure 3 It is a schematic structure diagram of the integrated cylinder assembly of the utility model;

[0020] Figure 4 It is a schematic cross-sectional structure diagram of the integrated cylinder assembly of the utility model;

[0021] Figure 5 It is a schematic structure diagram of the linear compressor of the utility model;

[0022] Figure 6 It is a schematic connection structure diagram of the integrated piston assembly and the rotor assembly of the utility model;

[0023] Figure 7 It is a schematic connection structure diagram of the integrated cylinder assembly and the inner stator assembly of the utility model;

[0024] Figure 8 It is a schematic structure diagram of the opposed linear compressor of the utility model;

[0025] Description of the reference numerals in the figure: 1. Cylinder assembly; 11. Cylinder; 12. Compression chamber; 13. Connection chamber; 14. Slide groove; 2. Piston assembly; 21. Piston; 22. Support shaft; 23. Aerostatic hole; 3. Rotor assembly; 31. Magnet assembly; 32. Connection bracket; 4. Inner stator assembly; 41. Inner yoke; 5. Outer stator assembly; 6. Spring assembly; 7. Inlet and exhaust end cover assembly. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] Those skilled in the art can understand that although some of the embodiments herein include certain features included in other embodiments but not other features, the combination of the features of different embodiments means that it is within the scope of the present utility model and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0028] [[ID=1> Figure 1 to Figure 8 Describe a compression part structure and a linear compressor of the present utility model.

[0029] The linear compressor includes a motor part structure and a compression part structure.

[0030] The motor part structure includes a stator assembly and a rotor assembly 3. The stator assembly is fixed on the compressor housing, and the rotor moves linearly through the electromagnetic principle. The interaction between the rotor assembly 3 and the stator assembly generates a magnetic field, and then the rotor assembly 3 moves linearly. [[ID=>

[0031] The compression part structure includes a cylinder assembly 1 and a piston assembly 2. The cylinder assembly 1 is sleeved outside the piston assembly 2, and the piston assembly 2 can slide relative to the cylinder assembly 1. The rotor assembly 3 drives the piston assembly 2 to move linearly through the electromagnetic principle.

[0032] The rotor assembly 3 includes a connection bracket 32. The connection bracket 32 is connected to the cylinder assembly 1. A magnet assembly 31 is connected to one end of the connection bracket 32 away from the support shaft 22. The magnet assembly 31 is sleeved outside the piston assembly 2. Specifically, the magnet assemblies 31 are all connected with fixing rings to be fixed to the connection bracket 32.

[0033] ​The stator assembly includes an inner stator 4 and an outer stator 5. The inner stator 4 is sleeved outside the cylinder assembly 1, and the outer stator 5 is sleeved outside the inner stator 4.

[0034] Specifically, the inner stator 4 includes an inner yoke 41. The inner yoke 41 is sleeved outside the cylinder assembly 1, and the inner yoke 41 is located at the connection of the two connection cavities 13. The inner yoke 41 is limited by a snap ring and fixed by a pressing plate.

[0035] The linear compressor further includes a spring assembly 6. The spring assembly 6 includes a spring and a spring seat. The two ends of the spring are respectively fixedly connected to the connection bracket 32 and the spring seat.

[0036] Currently, although the existing technical solutions have solved the friction problem between the piston 21 and the cylinder 11, the problems of the existence of the ball head universal joint adjustment and the service life of the shaft and the bearing have not been solved and need to be replaced periodically. Due to the existence of the ball head or the universal joint, the scheme of the piston air-floating support motor cannot be realized. If directly assembled, the coaxial assembly of the two pistons, the shaft and the two cylinders at both ends cannot be guaranteed, and the motor air-floating cannot be realized either.

[0037] Therefore, both the cylinder assembly 1 and the piston assembly 2 are integrally formed. The integrally formed piston assembly 2 and the integrally formed cylinder assembly 1 are coaxially assembled, reducing the coaxial assembly of 5 parts to 2 parts, reducing the assembly requirements, improving the coaxial assembly efficiency. At the same time, the integrated design is more conducive to mass production and manufacturing, improving production efficiency, and can reduce the axial length of the linear compressor, which is beneficial to the miniaturized design of the compressor.

[0038] Moreover, the present utility model uses the piston assembly 2 to support the mover assembly 3, making the entire mover assembly 3 in an air suspension state, structurally solving the problem of oil-free friction of the ball head, the shaft and the bearing, and ensuring the service life of the oil-free operation of the compressor.

[0039] Preferably, the mating dimensions of the integrally formed piston assembly 2 and the integrally formed cylinder assembly 1 are ensured by machining. In other embodiments of the present utility model, the mating dimensions can also be ensured by other means as long as the mating dimensions of the integrally formed piston assembly 2 and the integrally formed cylinder assembly 1 meet the requirements.

[0040] The piston assembly 2 includes two pistons 21 and a support shaft 22. The two pistons 21 are fixedly connected by the support shaft 22. The integrally formed piston assembly 2 is formed by fixedly connecting the two pistons 21 and the support shaft 22, and after forming the integrally formed piston assembly 2, it is integrally machined to the designed dimensions.

[0041] Preferably, the two pistons 21 are welded to the support shaft 22 to ensure sufficient connection strength. In other embodiments of the present invention, the two pistons 21 and the support shaft 22 can also be fixed in other ways, as long as the sufficient connection strength between the two pistons 21 and the support shaft 22 can be ensured.

[0042] Specifically, the piston 21 is provided with an air floating hole 23, and the high-pressure gas compressed by the end face of the piston 21 is used to suspend the piston assembly 2 and the mover assembly 3.

[0043] The cylinder assembly 1 includes two cylinders 11, and the two cylinders 11 are fixedly connected. The integrated cylinder assembly 1 is formed by fixedly connecting the two cylinders 11, and after the integrated cylinder assembly 1 is formed, it is machined to the designed dimensions.

[0044] Specifically, the cylinder 11 includes a compression chamber 12 and a connection chamber 13. The compression chamber 12 and the connection chamber 13 are communicated. The two cylinders 11 are communicated through the connection chamber 13 to form the cylinder assembly 1. The cylinder 11 is slidably connected to the corresponding piston 21 through the compression chamber 12. A chute 14 is opened on the connection chamber 13, and the connection bracket 32 passes through the chute 14 and is fixedly connected to the support shaft 22.

[0045] Preferably, the clearance between the compression chamber 12 of the cylinder 11 and the piston 21 is 0.02 mm.

[0046] Specifically, the end parts of the compression chambers 12 of the two cylinders 11 are respectively connected with an air inlet and outlet end cover assembly 7.

[0047] By comparing the existing split design and the integrated design of the present invention, it is found that the integrated design of the single-group compressor of the present invention reduces the axial length of the whole machine by at least 20%, which is beneficial to the design of a miniaturized compressor.

[0048] As Figure 8 shown, the single-group compressors can be opposed, and the air inlet and outlet are connected between the two groups of compressors, which can not only solve the problem of large overall vibration of the single-group compressor, but also increase the power of a single compressor. The modular and batch production of the compressor can be realized.

[0049] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A compression part structure, characterized in that, It includes a cylinder assembly and a piston assembly. The cylinder assembly is sleeved outside the piston assembly, and the piston assembly can slide relative to the cylinder assembly. Both the cylinder assembly and the piston assembly are integrally formed, and the integrally formed piston assembly is coaxially assembled with the integrally formed cylinder assembly.

2. The compression part structure according to claim 1, characterized in that The piston assembly includes two pistons and a support shaft. The two pistons are fixedly connected by the support shaft, and the integrally formed piston assembly is formed by the fixed connection of the two pistons and the support shaft.

3. The compression part structure according to claim 2, wherein, The piston is provided with air floating holes.

4. The compression part structure according to claim 1, characterized in that, The cylinder assembly includes two cylinders. The two cylinders are fixedly connected, and the integrally formed cylinder assembly is formed by the fixed connection of the two cylinders.

5. The compression part structure according to claim 2 or 4, characterized in that The cylinder includes a compression chamber and a connection chamber. The compression chamber and the connection chamber are communicated. The two cylinders are communicated through the connection chamber to form the cylinder assembly, and the cylinder is slidably connected to the corresponding piston through the compression chamber.

6. The compression part structure according to claim 5, characterized in that Exhaust end covers are respectively connected to the ends of the compression chambers of the two cylinders.

7. A linear compressor, characterized in that, It includes the compression part structure according to any one of the above claims 1-6, and also includes a motor part structure. The motor part structure includes a stator assembly and a rotor assembly, and the rotor assembly drives the piston assembly to move linearly through electromagnetic principles.

8. The linear compressor according to claim 7, wherein The rotor assembly includes a connection bracket. The connection bracket is fixedly connected to the support shaft, and a magnet assembly is connected to one end of the connection bracket away from the support shaft. The magnet assembly is sleeved outside the piston assembly.

9. The linear compressor according to claim 8, wherein A sliding groove is formed on the connection chamber, and the connection bracket passes through the sliding groove and is fixedly connected to the support shaft.

10. The linear compressor according to claim 7, characterized in that, The stator assembly includes an inner stator and an outer stator. The inner stator is sleeved outside the cylinder assembly, and the outer stator is sleeved outside the inner stator.

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