Air floating support structure of linear compressor and linear compressor

Abstract

The application discloses a kind of air floating support structures of linear compressor and linear compressor, the air floating support structure includes air floating cylinder, air floating support head and air floating support shaft.The one end of air floating cylinder is closed and the other end forms opening, air floating hole is equipped on the cylinder wall of air floating cylinder;Air floating support head is at least partially located in air floating cylinder, and annular air gap is formed between air floating support head and the cylinder wall of air floating cylinder, and annular air gap surrounds air floating support head;One end of air floating support shaft is used to connect the moving component of linear compressor, and the other end of air floating support shaft is connected with air floating support head;Wherein, air floating hole has air inlet and air outlet, air inlet is arranged towards the outside of air floating cylinder and is used to communicate with the exhaust cavity of linear compressor, and air outlet is arranged towards annular air gap;The opening of air floating cylinder is used to communicate with the suction cavity of linear compressor.According to the air floating support structure of the application, it is simple in structure, and can generate radial support to moving component, reduce wear.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, and particularly relates to an air-float support structure for a linear compressor and a linear compressor. Background Technology

[0002] A linear compressor is a type of reciprocating compressor that utilizes a linear motor. Currently, some existing compressor power components use leaf springs to provide axial support for the mover. However, leaf springs are difficult to meet the requirements of large strokes and are prone to fatigue fracture under long strokes. Other existing compressor power components use column springs to provide axial support for the mover. However, column springs do not provide radial force, which easily causes friction between the piston and cylinder, leading to a reduction in the lifespan of the piston or cylinder.

[0003] Therefore, there is room for improvement in the support structure of linear compressors regarding how to provide radial support for the mover. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, the first aspect of the present invention aims to provide an air-float support structure for a linear compressor, which is simple in structure and can provide radial support for the moving parts, thereby reducing wear on some components within the linear compressor during operation.

[0005] The second aspect of this invention aims to provide a linear compressor.

[0006] According to an embodiment of the present invention, an air-float support structure for a linear compressor includes an air-float cylinder, an air-float support head, and an air-float support shaft. One end of the air-float cylinder is closed, and the other end is open. Air-float holes are provided on the cylinder wall of the air-float cylinder. The air-float support head is at least partially located inside the air-float cylinder, and an circumferential air gap is formed between the air-float support head and the cylinder wall of the air-float cylinder, the circumferential air gap surrounding the air-float support head. One end of the air-float support shaft is used to connect to the moving part of the linear compressor, and the other end of the air-float support shaft is connected to the air-float support head. The air-float holes have an inlet and an outlet. The inlet faces the outside of the air-float cylinder and is used to communicate with the exhaust chamber of the linear compressor, and the outlet faces the circumferential air gap. The opening of the air-float cylinder is used to communicate with the intake chamber of the linear compressor.

[0007] According to an embodiment of the present invention, the air-bearing support structure of a linear compressor, through the cooperation of an air-bearing cylinder, an air-bearing support head, and an air-bearing support shaft, provides a simple and highly stable air-bearing support structure for the moving part. An circumferential air gap is formed between the air-bearing support head and the cylinder wall. Driven by the pressure difference between the exhaust chamber and the intake chamber, high-pressure gas in the exhaust chamber rushes into the circumferential air gap, forming radial support for the air-bearing support head. When the air-bearing support head reciprocates linearly along the axis, the outer circumferential surface of the air-bearing support head is separated from the inner circumferential surface of the air-bearing cylinder by the high-pressure gas, thereby reducing wear caused by radial compression between the air-bearing support head and the air-bearing cylinder.

[0008] When the moving component reciprocates along the axis, the air-bearing support head is linked with the moving component, and the high-pressure gas in the circumferential air gap provides radial support force to the moving component. When the power component reciprocates along the axis, the radial support of the air-bearing support structure reduces wear caused by radial compression between the power component and other parts of the motor assembly.

[0009] In a linear compressor, the moving part drives the piston to reciprocate along the axis relative to the cylinder. After the moving part obtains radial support, each piston also obtains radial support, thereby reducing wear caused by radial compression between the piston and the cylinder.

[0010] This air-bearing support structure is less expensive than rolling bearings, and the high-pressure gas also reduces wear, resulting in a longer service life compared to rolling bearings.

[0011] Compared to sliding bearings, this air-bearing support structure is less expensive, and the high-pressure airflow can dissipate heat, preventing overheating, fatigue spalling, and other issues, thus resulting in a longer service life compared to sliding bearings.

[0012] In addition, this method, under the premise of reasonably controlling the flow rate and position of the exhaust chamber to the air float, also helps to guide the coolant in the exhaust chamber to flow back along the air float support structure.

[0013] By connecting the air outlet in the air float hole to the intake chamber of the linear compressor, the gas discharged from the air float support structure enters the intake chamber of the linear compressor, preventing the gas generated in the air float support structure from entering the compression chamber of the piston. This prevents the gas from interfering with the compressed air and ensures that the exhaust pressure of the linear compressor is not affected.

[0014] According to some embodiments of the present invention, the air-float support structure of a linear compressor includes a plurality of air-float holes, which are divided into at least one ring on the air-float cylinder; each ring has at least two air-float holes, which are arranged circumferentially at intervals on the cylinder wall of the air-float cylinder.

[0015] According to some embodiments of the present invention, in the air-float support structure of a linear compressor, the area of ​​the air inlet on the air-float hole is larger than the area of ​​the air outlet.

[0016] Optionally, the air flotation hole includes a large hole section connecting to the air inlet and a small hole section connecting to the air outlet; the large hole section and the small hole section extend radially along the air flotation cylinder.

[0017] In some embodiments, the air flotation support head includes a support tube that extends axially along the air flotation cylinder, and the circumferential air gap is formed between the outer peripheral surface of the support tube and the inner peripheral surface of the air flotation cylinder.

[0018] Specifically, the air-bearing support head further includes: a connecting plate, the center of which is connected to the air-bearing support shaft, the edge of which is connected to the support tube, and the connecting plate is provided with perforations.

[0019] According to some embodiments of the present invention, the air-float support structure of a linear compressor is provided, wherein the air-float cylinder is a cylindrical cylinder, and the air-float support head is concentric with and equidistant from the air-float cylinder.

[0020] According to a second aspect of the present invention, a linear compressor includes a housing, a motor assembly, a compression assembly, and an air-float support structure for the linear compressor described above. The inner cavity of the housing constitutes the intake chamber of the linear compressor; the motor assembly is installed within the housing and includes a moving part that reciprocates linearly along the axial direction; the compression assembly is located within the housing and is disposed on at least one side of the motor assembly along the axial direction, the compression assembly including a cylinder and a piston, the cylinder defining a piston chamber, the piston connecting to the moving part and engaging within the piston chamber; the air-float support structure is disposed on at least one side of the motor assembly along the axial direction, the opening of the air-float cylinder facing the moving part, and the air-float support shaft connecting to the moving part; the linear compressor has an exhaust chamber, the exhaust port of the piston chamber and the inlet of the air-float cylinder both communicating with the exhaust chamber.

[0021] According to some embodiments of the linear compressor of the present invention, a communicating cavity is formed in the cylinder, the communicating cavity having a mating port at one end facing the moving part, the communicating cavity communicating with the exhaust cavity; the air float is located in the communicating cavity, and the wall of the air float is sealed to the mating port.

[0022] In some embodiments, the linear compressor further includes a moving disc and an elastomer. The moving disc is located within the housing and is disposed on at least one side of the motor assembly in the axial direction, and the moving disc is connected to the moving sub-component; the elastomer is connected to the side of the moving disc away from the moving sub-component, and the elastomer is used to support the moving sub-component; the piston and the air-bearing support shaft are both connected to the moving disc.

[0023] Specifically, the compression assembly is provided on both sides of the motor assembly, the air bearing support structure is provided on both sides of the motor assembly, the moving plate and the elastic body are provided on both sides of the motor assembly; the air bearing support shaft on the air bearing support structure on both sides is a single piece, and the air bearing support shaft passes through the moving plate and the motor assembly on both sides.

[0024] Optionally, the compression assembly further includes a ball head, through which the piston is connected to the moving part.

[0025] According to the linear compressor of the present invention, the air-bearing support structure can reduce the radial runout of the elastomer in the housing, realize the non-contact relative motion between the piston and the piston chamber, thereby reducing friction loss and improving the efficiency of the whole machine.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a cross-sectional schematic diagram of an air-float support structure according to some embodiments of this application;

[0029] Figure 2 This is a schematic diagram of the air-float support structure according to some embodiments of this application;

[0030] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;

[0031] Figure 4 This is a front view of a linear compressor according to some embodiments of this application;

[0032] Figure 5 yes Figure 4 Sectional view at point BB;

[0033] Figure 6 yes Figure 5 A magnified view of a section at point C;

[0034] Figure 7 This is a schematic diagram of the structure of a moving part according to some embodiments of this application;

[0035] Figure 8 This is a perspective view of a stator component according to some embodiments of this application;

[0036] Figure 9 This is a front view of a stator component according to some embodiments of this application;

[0037] Figure 10 yes Figure 9 Sectional view at point DD;

[0038] Figure 11 This is a schematic diagram of the connection between the piston and the ball head according to some embodiments of this application.

[0039] Figure label:

[0040] Linear compressor 100

[0041] Shell 1, intake chamber 11, exhaust chamber 12

[0042] Motor assembly 2, stator component 21, outer stator 211, coil 212, inner stator 213, mover component 22, permanent magnet 221, fixing component 222.

[0043] Compression assembly 3, cylinder 31, piston chamber 311, exhaust port 3110, connecting chamber 312, mating port 3121, piston 32, ball head 33

[0044] Air flotation support structure 4, air flotation cylinder 41, air flotation hole 42, air inlet 421, air outlet 422, large hole section 423, small hole section 424.

[0045] Air-bearing support head 43, support pipe 431, connecting plate 432, perforation 4321, circumferential air gap 44, air-bearing support shaft 45, moving disc 5, elastic body 6. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0047] The following is for reference. Figures 1-3 The air-float support structure 4 of the linear compressor 100 according to an embodiment of the present invention is described.

[0048] It is known that the linear compressor 100 includes a motor assembly 2 and an electronic assembly including a mover component 22 and a stator component 21.

[0049] An air-bearing support structure 4 of a linear compressor 100 according to an embodiment of the present invention. The air-bearing support structure 4 is used to support the moving part 22 in the linear compressor 100 so that the moving part 22 moves linearly reciprocally along its axial direction.

[0050] like Figures 1-2 As shown, the air-bearing support structure 4 of the linear compressor 100 includes an air-bearing cylinder 41, an air-bearing support head 43, and an air-bearing support shaft 45.

[0051] The air flotation cylinder 41 is closed at one end and open at the other end, and air flotation holes 42 are provided on the cylinder wall of the air flotation cylinder 41. Specifically, the air flotation cylinder 41 is a cylindrical structure that defines an open end. The air flotation holes 42 provided on the cylinder wall allow gas from the outer periphery of the cylinder wall of the air flotation cylinder 41 to enter the interior of the air flotation cylinder 41.

[0052] The air flotation support head 43 is at least partially located inside the air flotation cylinder 41, and an circumferential air gap 44 is formed between the air flotation support head 43 and the cylinder wall of the air flotation cylinder 41, the circumferential air gap 44 surrounding the air flotation support head 43.

[0053] Specifically, when the air-bearing support structure 4 of the linear compressor 100 draws in air, the moving part 22 drives the air-bearing support head 43 to move to one side, creating a pressure difference between the inner and outer sides of the air-bearing cylinder 41 within the air-bearing support structure 4 of the linear compressor 100. At this time, the air pressure inside the air-bearing cylinder 41 is lower, and the outer gas rushes into the air-bearing hole 42 under the drive of the pressure difference, forming high-pressure gas. The high-pressure gas then enters the circumferential air gap 44.

[0054] Since the circumferential air gap 44 is located between the inner wall of the air flotation cylinder 41 and the outer wall of the air flotation support head 43, the circumferential air gap 44 can radially push the air flotation support head 43, forming a circumferential support force. The circumferential support force prevents the air flotation support head 43 from sticking to the inner wall of the air flotation cylinder 41, and has a passive correction effect on the air flotation support head 43, effectively adjusting the position of the air flotation support head 43 inside the air flotation cylinder 41, ensuring that the air flotation support head 43 always remains in a coaxial position with the air flotation cylinder 41, and reducing the friction between the air flotation support head 43 and the air flotation cylinder 41.

[0055] One end of the air-bearing support shaft 45 is used to connect the moving part 22 of the linear compressor 100, and the other end of the air-bearing support shaft 45 is connected to the air-bearing support head 43. The air-bearing support shaft 45 connects the moving part 22 and the air-bearing support head 43, forming a rigid connection between them, so that the moving part 22 and the air-bearing support head 43 are in the same axial position. Therefore, the moving part 22 obtains better radial support effect during operation, which greatly improves the operational stability of the linear compressor 100.

[0056] The air flotation hole 42 has an air inlet 421 and an air outlet 422. The air inlet 421 is arranged facing the outside of the air flotation cylinder 41 and is used to connect the exhaust chamber 12 of the linear compressor 100. The air outlet 422 is arranged facing the circumferential air gap 44. The opening of the air flotation cylinder 41 is used to connect the intake chamber 11 of the linear compressor 100.

[0057] When the air-bearing support structure 4 of the linear compressor 100 draws in air, the gas can enter the circumferential air gap 44 from the exhaust chamber 12 of the linear compressor 100.

[0058] When the air float support structure 4 of the linear compressor 100 discharges air, the air float support head 43 compresses the air inside the air float cylinder 41. At this time, the air in the air float support structure 4 is discharged into the intake chamber 11 of the linear compressor 100.

[0059] The opening of the air float 41 is used to connect to the intake chamber 11 of the linear compressor 100. When the air float support structure 4 of the linear compressor 100 discharges gas, the gas enters the intake chamber 11 of the linear compressor 100 through the opening of the air float 41 to discharge the gas in preparation for the next intake.

[0060] like Figure 2 As shown, in the air-bearing support structure 4 of the linear compressor 100 according to some embodiments of the present invention, there are multiple air-bearing holes 42, which are arranged in at least one ring on the air-bearing cylinder 41. Each ring has at least two air-bearing holes 42, which are arranged circumferentially at intervals on the cylinder wall of the air-bearing cylinder 41. This facilitates the uniform distribution of high-pressure gas within the circumferential air gap 44, thereby facilitating the formation of a uniform circumferential support force on the air-bearing support head 43.

[0061] The distribution of the air flotation holes 42 facilitates the uniform distribution of gas entering the circumferential air gap 44, ensuring that the circumferential air gap 44 between the air flotation support head 43 and the air flotation cylinder 41 is evenly distributed and maintaining the centering position of the air flotation support head 43.

[0062] Optionally, the air flotation holes 42 are symmetrically distributed on the wall of the air flotation cylinder 41. This allows the high-pressure gas to provide symmetrical and uniform support force to the air flotation support head 43.

[0063] In some embodiments, such as Figure 3 As shown, the area of ​​the air inlet 421 on the air flotation hole 42 is larger than the area of ​​the air outlet 422. This ensures a more stable gas flow rate entering the circumferential air gap 44. As the area of ​​the air outlet 422 decreases, the gas velocity increases, resulting in a faster and more uniform gas flow rate entering the circumferential air gap 44. This helps provide stronger and more stable support for the air flotation support head 43, avoiding problems such as unstable support force in the circumferential air gap 44 caused by gas flow fluctuations.

[0064] Optionally, such as Figure 3 As shown, the air flotation orifice 42 includes a large orifice section 423 connecting to the air inlet 421 and a small orifice section 424 connecting to the air outlet 422. The large orifice section 423 has a large cross-section, allowing gas to flow in smoothly. The gas then enters the small orifice section 424, where the gas velocity increases due to the reduced cross-section. This arrangement ensures that the gas undergoes an acceleration process as it passes through the air flotation orifice 42, thereby creating high-pressure gas at the outlet of the air flotation orifice 42.

[0065] The large-aperture section 423 and the small-aperture section 424, extending radially along the air flotation cylinder 41, can change the flow direction of the gas. When the gas enters the large-aperture section 423, its direction is constrained by the large-aperture section 423. Subsequently, when the gas passes through the small-aperture section 424, because the small-aperture section 424 is radially oriented towards the air flotation cylinder 41, the generated high-pressure gas can also be ejected radially towards the air flotation cylinder 41. Therefore, the combined arrangement of the large-aperture section 423 and the small-aperture section 424 helps to guide the formation direction of the gas, so that the air flotation support head 43 is subjected to a stable and vertical force, ensuring that the movement of the air flotation support head 43 within the air flotation cylinder 41 is smoother, reducing unnecessary friction and vibration.

[0066] like Figure 2 As shown, the air-bearing support structure 4 of the linear compressor 100 according to some embodiments of the present invention includes an air-bearing support head 43 comprising a support tube 431. The support tube 431 extends axially along the air-bearing cylinder 41, and an circumferential air gap 44 is formed between the outer peripheral surface of the support tube 431 and the inner peripheral surface of the air-bearing cylinder 41. The support tube 431 increases the axial air contact length of the circumferential air gap 44, thereby improving the stability of the air-bearing support head 43.

[0067] In some embodiments, such as Figure 2 As shown, the air flotation support head 43 also includes a connecting plate 432. The center of the connecting plate 432 is connected to the air flotation support shaft 45, and the edge of the connecting plate 432 is connected to the support tube 431. The connecting plate 432 is provided with a through hole 4321.

[0068] It is worth noting that in some existing compressors, the gas discharged from the air-float support structure flows into the compressor's exhaust chamber. This uncompressed gas occupies the air volume in the exhaust chamber, reducing the amount of compressed gas in the exhaust chamber and causing the compressor's exhaust pressure to decrease.

[0069] The connecting plate 432 is located on the air flotation support head 43 near the intake chamber 11 of the linear compressor 100, which facilitates the gas discharged from the air flotation support structure 4 to enter the intake chamber 11 through the perforation 4321, thereby reducing the possibility of gas entering the exhaust chamber 12 and ensuring the normal performance of the linear compressor 100.

[0070] In some embodiments, the connecting plate 432 has a plurality of perforations 4321, and the plurality of perforations 4321 are arranged radially symmetrically. This allows the gas in the air-bearing support structure 4 to be discharged uniformly from these perforations 4321, better balancing the force on the air-bearing support head 43 and improving its support capacity and stability.

[0071] The air-bearing support structure 4 of the linear compressor 100 according to some embodiments of the present invention, such as Figures 1-2As shown, the air flotation cylinder 41 is cylindrical. This provides a more stable and uniform gas flow space.

[0072] The air flotation support head 43 and the air flotation cylinder 41 are concentric and equidistantly positioned to ensure a uniform annular air gap. A uniform air gap ensures that the supporting force on the air flotation support head 43 remains consistent in the circumferential direction, reducing friction between the air flotation support head 43 and the air flotation cylinder 41, thereby ensuring stable operation of the linear compressor 100. This also reduces abnormal vibrations of the linear compressor 100, thus lowering the resulting noise.

[0073] like Figure 4 As shown, a linear compressor 100 according to a second aspect embodiment of the present invention.

[0074] like Figure 5 As shown, the linear compressor 100 includes a housing 1, a motor assembly 2, a compression assembly 3, and an air-bearing support structure 4.

[0075] The inner cavity of the housing 1 forms the suction chamber 11 of the linear compressor 100. The motor assembly 2 is installed within the housing 1 and includes a moving part 22 that reciprocates linearly along the axial direction. The compression assembly 3 is located within the housing 1 and is disposed on at least one side of the motor assembly 2 along the axial direction. The compression assembly 3 includes a cylinder 31 and a piston 32. The cylinder 31 defines a piston chamber 311. The piston 32 is connected to the moving part 22 and engages within the piston chamber 311. The air-bearing support structure 4 is the air-bearing support structure 4 in the first aspect embodiment of this application. The air-bearing support structure 4 is disposed on at least one side of the motor assembly 2 along the axial direction. The opening of the air-bearing cylinder 41 faces the moving part 22, and the air-bearing support shaft 45 is connected to the moving part 22. The air-bearing support structure 4 can effectively support and balance the movement of the moving part 22. The air-bearing support shaft 45 can move freely within the air-bearing cylinder 41 to accommodate the reciprocating motion of the moving part 22 while reducing friction and resistance. The air-bearing support structure 4 makes the movement component 22 more stable and maintains a constant internal pressure in the linear compressor 100, which is beneficial to the constant output air pressure.

[0076] like Figure 6 As shown, the linear compressor 100 has an exhaust chamber 12, and the exhaust port 3110 of the piston chamber 311 and the air inlet 421 of the air float hole 42 are both connected to the exhaust chamber 12. The exhaust chamber 12 is used to store and discharge compressed gas. The air inlet 421 of the air float hole 42 is connected to the exhaust chamber 12, so that the discharged gas can smoothly enter the exhaust chamber 12 through these channels.

[0077] A linear compressor 100 according to some embodiments of the present invention, such as Figure 6 As shown, a connecting cavity 312 is formed inside the cylinder 31. The connecting cavity 312 has a mating port 3121 at one end facing the moving part 22. The connecting cavity 312 connects to the exhaust cavity 12.

[0078] The air flotation cylinder 41 is located inside the communicating cavity 312, and the cylinder wall of the air flotation cylinder 41 is sealed to the mating port 3121. This prevents gas from leaking out from the gap between the air flotation cylinder 41 and the mating port 3121, thereby improving the air intake efficiency of the air flotation cylinder 41 and enhancing the centering effect of the air flotation support head 43.

[0079] Optionally, a gasket may be provided between the fitting port 3121 and the cylinder wall of the air flotation cylinder 41 to improve the sealing performance.

[0080] A linear compressor 100 according to some embodiments of the present invention, such as Figures 5-7 As shown, it also includes a movable disc 5 and an elastic body 6. The movable disc 5 is located inside the housing 1 and is disposed on at least one side of the motor assembly 2 in the axial direction. The movable disc 5 is connected to the moving part 22. Since the linear compressor 100 will generate vibration when it is working, the function of the movable disc 5 is to improve the stability of the elastic body 6, thereby increasing mechanical stability.

[0081] The elastic body 6 is connected to the side of the moving disk 5 away from the moving part 22. The elastic body 6 supports the moving part 22. The piston 32 and the air float support shaft 45 are both connected to the moving disk 5. When the moving part 22 reciprocates, the elastic body 6 collides with the housing 1 and provides a spring force in the opposite direction to the acceleration impact. At the same time, the elastic body 6 can also prevent the moving part 22 of the linear compressor 100 from being damaged by cylinder impact during high acceleration impact, thus improving the impact resistance of the whole machine.

[0082] In some embodiments, such as Figure 7 As shown, the moving part 22 also includes a permanent magnet 221 and a fastener 222 for fixing the permanent magnet 221.

[0083] In some embodiments, such as Figure 5 , Figures 8-10 As shown, the motor assembly 2 also includes a stator component 21. The stator component 21 is disposed inside the housing 1 and includes an outer stator 211, a coil 212, and an inner stator 213. The magnetic field generated by the stator component 21 directly interacts with the magnetic field of the permanent magnet 221 to realize the operation of the compressor.

[0084] A linear compressor 100 according to some embodiments of the present invention, such as Figures 5-6 As shown, compression components 3 are provided on both axial sides of the motor assembly 2, air-bearing support structures 4 are provided on both axial sides of the motor assembly 2, and moving discs 5 and elastic bodies 6 are provided on both axial sides of the motor assembly 2. The air-bearing support shafts 45 on the air-bearing support structures 4 on both sides are integral pieces, and the air-bearing support shafts 45 pass through the moving discs 5 and the motor assembly 2 on both sides.

[0085] The air-bearing support shaft 45 drives the air-bearing support structures 4 at both ends to reciprocate. When the moving part 22 of the linear compressor 100 moves to the first side, gas enters the first-side air-bearing support structure 4, keeping the air-bearing support head 43 and the air-bearing cylinder 41 on the first side in a coaxial position to avoid friction. When the moving part 22 of the linear compressor 100 moves to the second side, the relative position of the air-bearing support head 43 and the air-bearing support cylinder on the first side changes, causing gas to be discharged from the first-side air-bearing support structure 4. At the same time, gas enters the second-side air-bearing support structure 4, keeping the second-side air-bearing support head 43 and the air-bearing cylinder 41 in a coaxial position to avoid friction and wear, thus ensuring the performance of the linear compressor 100.

[0086] like Figure 11 As shown, in some embodiments of the linear compressor 100 according to the present invention, the compression assembly 3 further includes a ball head 33, through which the piston 32 is connected to the moving part 22. The degree of freedom can be adjusted by the ball head 33 to reduce assembly difficulty.

[0087] Optionally, the ball head 33 has three rotational degrees of freedom and one radial displacement degree of freedom, enabling the moving part 22 to achieve adaptive assembly and operation.

[0088] Below, please refer to the appendix. Figures 1-11 This application describes a linear compressor 100 according to a specific embodiment of the present application.

[0089] Reference Figures 4-5 The linear compressor 100 includes a housing 1, a motor assembly 2, a compression assembly 3, an air-bearing support structure 4, a moving disc 5, and an elastomer 6.

[0090] The motor assembly 2, compression assembly 3, air flotation support structure 4, moving disc 5, and elastomer 6 are all housed within the housing 1.

[0091] Reference Figure 5 The housing 1 includes an intake chamber 11 and an exhaust chamber 12. The intake chamber 11 is formed by the inner cavity of the housing 1.

[0092] Reference Figure 5 The motor assembly 2 includes a stator component 21 and a mover component 22. The stator component 21 is disposed inside the housing 1, and the mover component 22 reciprocates linearly along the axial direction within the housing 1.

[0093] Reference Figure 7 The moving part 22 also includes a permanent magnet 221 and a fastener 222 for fixing the permanent magnet 221.

[0094] Reference Figures 8-10 The stator component 21 includes an outer stator 211, a coil 212, and an inner stator 213.

[0095] Reference Figure 7 The moving plate 5 is located on both sides of the motor assembly 2 along the axial direction, and the moving plate 5 is connected to the moving part 22.

[0096] Reference Figure 7 The elastic body 6 is connected to the side of the moving disk 5 away from the moving part 22, and the elastic body 6 is used to support the moving part 22.

[0097] Reference Figures 1-2 The air-float support structure 4 includes an air-float cylinder 41, an air-float support head 43, and an air-float support shaft 45.

[0098] The air-bearing support shaft 45 passes through the motor assembly 2. The motor assembly 2 has a compression assembly 3, a moving disc 5, an elastic body 6, and an air-bearing support structure 4 on both axial sides.

[0099] The air flotation cylinder 41 is a cylinder and is concentric and equidistant from the air flotation support head 43. One end of the air flotation cylinder 41 is closed and the other end is open. The opening of the air flotation cylinder 41 faces the moving part 22. The air flotation support shaft 45 is connected to the moving part 22.

[0100] Reference Figures 1-2 The air flotation cylinder 41 has multiple air flotation holes 42 on its cylinder wall. The multiple flotation holes are arranged circumferentially on the cylinder wall of the air flotation cylinder 41 at intervals and form multiple rings.

[0101] Reference Figure 3 The air flotation hole 42 includes an air inlet 421, an air outlet 422, a large hole section 423, and a small hole section 424.

[0102] The area of ​​the air inlet 421 is larger than the area of ​​the air outlet 422.

[0103] The large orifice section 423 is connected to the air inlet 421, and the small orifice section 424 is connected to the air outlet 422. The large orifice section 423 and the small orifice section 424 are arranged to extend radially along the air float cylinder 41.

[0104] Reference Figure 2 The air flotation support head 43 includes a support pipe 431 and a connecting plate 432.

[0105] The support tube 431 extends along the axial direction of the air flotation cylinder 41, and an circumferential air gap 44 is formed between the outer peripheral surface of the support tube 431 and the inner peripheral surface of the air flotation cylinder 41.

[0106] The center of the connecting plate 432 is connected to the air-bearing support shaft 45, and the edge of the connecting plate 432 is connected to the support tube 431. The connecting plate 432 is provided with a through hole 4321.

[0107] Reference Figures 5-6 The compression assembly 3 includes a cylinder 31, a piston 32, and a ball head 33.

[0108] Both piston 32 and air bearing support shaft 45 are connected to moving disc 5.

[0109] Piston 32 is connected to mover component 22 via ball head 33.

[0110] Reference Figure 6 The cylinder 31 defines a piston chamber 311. The piston 32 is connected to the moving part 22 and fits in the piston chamber 311. The exhaust port 3110 of the piston chamber 311 and the air inlet 421 of the air float hole 42 are both connected to the exhaust chamber 12.

[0111] Reference Figure 6 A connecting cavity 312 is formed inside the cylinder 31. The connecting cavity 312 has a mating port 3121 at one end facing the moving part 22. The air float 41 is located inside the connecting cavity 312. Part of the cylinder wall of the air float 41 is sealed to the mating port 3121. The connecting cavity 312 is connected to the exhaust cavity 12.

[0112] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0113] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0114] In the description of this specification, references to terms such as "embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, 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.

[0115] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air-bearing support structure for a linear compressor, characterized in that, include: An air flotation cylinder, wherein one end of the air flotation cylinder is closed and the other end is open, and the cylinder wall of the air flotation cylinder is provided with air flotation holes; An air-bearing support head, wherein at least part of the air-bearing support head is located inside the air-bearing cylinder, and an circumferential air gap is formed between the air-bearing support head and the cylinder wall of the air-bearing cylinder, the circumferential air gap surrounding the air-bearing support head; An air-bearing support shaft, one end of which is used to connect to the moving part of the linear compressor, and the other end of which is connected to the air-bearing support head; The air flotation hole has an air inlet and an air outlet. The air inlet is arranged facing the outside of the air flotation cylinder and is used to connect to the exhaust chamber of the linear compressor. The air outlet is arranged facing the circumferential air gap. The opening of the air flotation cylinder is used to connect to the intake chamber of the linear compressor; The air-bearing support head includes: A support tube extends along the axial direction of the air flotation cylinder, and the circumferential air gap is formed between the outer peripheral surface of the support tube and the inner peripheral surface of the air flotation cylinder. A connecting plate is provided, the center of which is connected to the air-bearing support shaft, and the edge of which is connected to the support tube. The connecting plate is provided with perforations, through which the gas discharged from the air-bearing support structure enters the air intake chamber.

2. The air-bearing support structure for the linear compressor according to claim 1, characterized in that, The air flotation holes are multiple, and the air flotation holes are divided into at least one circle on the air flotation cylinder; Each ring has at least two air flotation holes, which are arranged circumferentially on the wall of the air flotation cylinder.

3. The air-bearing support structure for the linear compressor according to claim 1, characterized in that, On the air flotation hole, the area of ​​the air inlet is larger than the area of ​​the air outlet.

4. The air-float support structure for the linear compressor according to claim 3, characterized in that, The air flotation hole includes a large hole section connected to the air inlet and a small hole section connected to the air outlet; The large-hole section and the small-hole section are arranged to extend radially along the air flotation cylinder.

5. The air-bearing support structure for a linear compressor according to any one of claims 1-4, characterized in that, The air flotation cylinder is a cylindrical shape, and the air flotation support head is concentric with and equidistant from the air flotation cylinder.

6. A linear compressor, characterized in that, include: The housing, the inner cavity of which constitutes the intake chamber of the linear compressor; A motor assembly, the motor assembly being installed within the housing, the motor assembly including a moving part that reciprocates linearly along the axial direction; A compression assembly, located within the housing and disposed on at least one side of the motor assembly in the axial direction, the compression assembly comprising: a cylinder and a piston, wherein a piston chamber is defined within the cylinder, and the piston is connected to the moving part and engages within the piston chamber; The air-bearing support structure of the linear compressor according to any one of claims 1-5, wherein the air-bearing support structure is disposed on at least one side of the motor assembly in the axial direction, the opening of the air-bearing cylinder faces the moving part, and the air-bearing support shaft is connected to the moving part; The linear compressor has an exhaust chamber, and the exhaust port of the piston chamber and the air inlet of the air float hole are both connected to the exhaust chamber.

7. The linear compressor according to claim 6, characterized in that, A connecting cavity is formed inside the cylinder, and the connecting cavity has a mating port at one end facing the moving part, and the connecting cavity communicates with the exhaust cavity; The air flotation cylinder is located inside the communicating cavity, and the cylinder wall of the air flotation cylinder is sealed to the mating port.

8. The linear compressor according to claim 6, characterized in that, Also includes: A movable disk, which is located inside the housing and is disposed on at least one side of the motor assembly in the axial direction, is connected to the moving part; An elastomer is connected to the side of the moving disk away from the moving part, and the elastomer is used to support the moving part; The piston and the air-bearing support shaft are both connected to the moving disc.

9. The linear compressor according to claim 8, characterized in that, The compression assembly is provided on both sides of the motor assembly, the air bearing support structure is provided on both sides of the motor assembly, and the moving plate and the elastic body are provided on both sides of the motor assembly. The air-bearing support shafts on both sides of the air-bearing support structure are integral pieces, and the air-bearing support shafts pass through the moving discs and the motor assemblies on both sides.

10. The linear compressor according to claim 6, characterized in that, The compression assembly also includes a ball head, through which the piston is connected to the moving part.

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