Linear compressor with long service life

Abstract

The utility model relates to the field of linear compressors, in particular to a long-service-life linear compressor which comprises a shell, a piston rod, a piston rod and a piston rod. The stator assembly comprises a stator framework, and the stator framework is connected with the air cylinder seat; the rotor assembly is arranged in the stator assembly and comprises a piston, a first plate spring and a second plate spring are arranged at the two ends of the piston respectively, and the first plate spring and the second plate spring are connected with the stator framework; the piston is in a hollow shape and arranged outside the air cylinder seat in a sleeving mode. The first plate spring and the second plate spring are directly connected with the piston by improving an internal movement structure of the compressor, and the consequence of abrasion increase caused by machining and assembling errors can be reduced; the first plate spring and the second plate spring directly support the left and right sides of the piston, so that the radial supporting effect can be improved, abrasion of the compressor in the operation process is reduced, and the service life of the compressor is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of linear compressors, specifically a long-life linear compressor. Background Technology

[0002] Linear Stirling refrigerators are widely used in civilian and military equipment such as infrared thermal imagers, infrared forward-looking and night vision, missile guidance, and space applications. As the core component of Stirling refrigerators, linear compressors are the power source that maintains the normal flow of working fluid.

[0003] With the continuous development of modern technology, the lifespan requirements for refrigeration machines are getting longer and longer. How to ensure that refrigeration machines can operate with low wear and long lifespan is a current research hotspot.

[0004] A compressor compresses gas through internal moving parts, which in turn drives an expander to produce a cooling effect. Conventional compressors use a piston and a magnetic steel frame as a single unit, with leaf springs directly supporting the magnetic steel frame. The magnetic steel frame is subjected to force, which drives the leaf springs and piston to move and compress the gas. This can lead to assembly errors and the radial force of the motor being superimposed, resulting in increased wear and reduced lifespan of the refrigeration unit. Utility Model Content

[0005] The purpose of this invention is to provide a long-life linear compressor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A long-life linear compressor, comprising:

[0008] The housing has a cylinder seat inside, the cylinder seat including a base and a cylinder connected to the base;

[0009] A stator assembly, the stator assembly including a stator frame, the stator frame being connected to the base;

[0010] A mover assembly is disposed inside the stator assembly. The mover assembly includes a piston, and a first leaf spring and a second leaf spring are respectively disposed at both ends of the piston. The first leaf spring and the second leaf spring are connected to the stator frame.

[0011] The piston is hollow and is fitted onto the outside of the cylinder.

[0012] Preferably, the stator assembly further includes a coil, which is looped on the outer surface of the stator frame, and a matching external soft magnet is fitted around the outside of the coil, which is connected to the stator frame.

[0013] Preferably, the inner rings of the first and second leaf springs are fixed to the piston by screws, and the outer rings of the first and second leaf springs are fixed to the stator frame by screws.

[0014] Preferably, the end of the piston away from the base is closed, and the closed end surrounds the cylinder to form a compression chamber.

[0015] Preferably, a gas flow channel is provided axially inside the cylinder, and an air outlet channel is provided radially on the base, the gas flow channel connecting the compression chamber and the air outlet channel.

[0016] Preferably, a matching inner soft magnet is bonded to the outer surface of the piston at a position corresponding to that of the coil.

[0017] Preferably, the outer surface of the piston has a groove, the inner soft magnet is embedded in the groove, and multiple sets of the inner soft magnet are bonded together, with the multiple sets of the inner soft magnet continuously wrapping around the outer surface of the piston.

[0018] Preferably, multiple sets of magnets are bonded to the outer surface of the inner soft magnet, and the multiple sets of magnets are spliced ​​together to surround the inner soft magnet.

[0019] Preferably, both ends of the outer casing are sealed with matching end caps, the end caps having an arc-shaped structure and an inner recess.

[0020] Preferably, the piston is welded and fixed to the first leaf spring and the second leaf spring, and the piston is made of the same material as the first leaf spring and the second leaf spring.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] In this invention, the piston is sleeved on the outside of the cylinder. At the same time, the magnetic steel frame structure is eliminated, allowing the first and second leaf springs to be directly connected to the piston, which can reduce the increased wear caused by processing and assembly errors.

[0023] The first and second leaf springs directly support the left and right sides of the piston, which can improve the radial support effect, thereby reducing wear during compressor operation and extending compressor life. Attached Figure Description

[0024] Figure 1 This is a cross-sectional schematic diagram of the linear compressor of this utility model;

[0025] Figure 2 This is a schematic diagram of the moving part component of this utility model.

[0026] In the diagram: 1. End cap; 2. First leaf spring; 3. Stator frame; 4. Coil; 5. Outer soft magnet; 6. Second leaf spring; 7. Cylinder seat; 8. Screw; 9. Magnet; 10. Inner soft magnet; 11. Piston; 12. Outer shell. Detailed Implementation

[0027] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0028] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0029] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" 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 element 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.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0031] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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 this utility model. 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.

[0032] Example 1:

[0033] Please see Figures 1 to 2 This utility model provides a long-life linear compressor, comprising:

[0034] The housing 12 has a cylinder seat 7 inside, which includes a base and a cylinder connected to the base.

[0035] A stator assembly, the stator assembly including a stator frame 3, the stator frame 3 being connected to the base;

[0036] A mover assembly is disposed inside the stator assembly. The mover assembly includes a piston 11, which is hollow and sleeved on the outside of the cylinder. A first leaf spring 2 and a second leaf spring 6 are respectively disposed at both ends of the piston 11, and the first leaf spring 2 and the second leaf spring 6 are connected to the stator frame 3.

[0037] By mounting the piston outside the cylinder and eliminating the need for a magnetic steel frame structure, the first and second leaf springs can be directly connected to the piston, which can reduce the increased wear caused by machining and assembly errors.

[0038] The first and second leaf springs directly support the left and right sides of the piston, which can improve the radial support effect, thereby reducing wear during compressor operation and extending compressor life.

[0039] Example 2:

[0040] like Figures 1-2 As shown, the long-life linear compressor disclosed in Embodiment 2 of this utility model has a structure that is basically the same as that in Embodiment 1, except that;

[0041] The stator assembly also includes a coil 4, which is looped on the outer surface of the stator frame 3. A matching external soft magnet 5 is fitted around the outside of the coil 4, and the external soft magnet 5 is connected to the stator frame 3.

[0042] The external soft magnet 5 can fix and protect the coil 4. At the same time, the coil 4 will generate a magnetic field when energized.

[0043] A matching inner soft magnet 10 is bonded to the outer surface of the piston 11 at a position corresponding to that of the coil 4. Preferably, the outer surface of the piston 11 has a groove, and the inner soft magnet 10 is embedded in the groove to reduce the space occupied by the inner soft magnet. To facilitate the installation of the inner soft magnet, multiple sets of inner soft magnets 10 are bonded together, and multiple sets of inner soft magnets 10 continuously wrap around the outer surface of the piston. For example, the inner soft magnet 10 has a semi-cylindrical structure, and two inner soft magnets 10 are spliced ​​together to just wrap around the outer surface of the piston.

[0044] Multiple sets of magnets 9 are bonded to the outer surface of the inner soft magnet 10. The magnets 9 are arranged in a tile-like manner, and the multiple sets of magnets 9 are spliced ​​together to surround the inner soft magnet 10.

[0045] When the coil 4 is energized with alternating current, it generates a magnetic field. The magnet 9 is subjected to force, which drives the inner soft magnet 10 to move together with the piston 11. The first leaf spring 2 and the second leaf spring 6 play the role of radial support and axial restoring force during the movement of the piston 11, ensuring that the center position of the piston 11 does not shift during the movement.

[0046] In a more detailed embodiment, the piston 11 is closed at one end away from the base, and the closed end forms a compression chamber with the cylinder.

[0047] The cylinder has an axially arranged gas flow channel, and the base has a radially arranged gas outlet channel. The gas flow channel connects the compression chamber and the gas outlet channel.

[0048] The magnet 9 drives the piston 11 to reciprocate axially, thereby generating compressed gas in the compression chamber between the piston 11 and the cylinder seat 7, and driving the compressed gas through the gas flow channel in the cylinder to the outlet channel on the base, and then driving the expander after being discharged through the connecting pipe.

[0049] Both ends of the outer casing 12 are sealed with matching end caps 1. The end caps 1 have an arc-shaped structure and the inner side of the end caps 1 is recessed to prevent the piston 11 from colliding with the end caps 1.

[0050] In one embodiment, the inner rings of the first leaf spring 2 and the second leaf spring 6 are fixed to the piston 11 by screws 8, and the outer rings of the first leaf spring 2 and the second leaf spring 6 are fixed to the stator frame 3 by screws 8. In other embodiments, the piston 11 can also be welded to the first leaf spring 2 and the second leaf spring 6, and the piston 11 is made of the same material as the first leaf spring 2 and the second leaf spring 6, thereby enabling better welding and fixing.

[0051] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0052] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A long-life linear compressor characterized by, The utility model relates to a kind of motor, including: Housing (12), the inside of the housing (12) is provided with cylinder seat (7), the cylinder seat (7) includes base and cylinder connected with base; Stator assembly, the stator assembly includes stator skeleton (3) connected with the base; Mover assembly, arranged in the inside of the stator assembly, the mover assembly includes piston (11), the both ends of the piston (11) are provided with first leaf spring (2) and second leaf spring (6) respectively, and the first leaf spring (2) and the second leaf spring (6) are connected with the stator skeleton (3); The piston (11) is hollow, and the piston (11) is set on the outside of cylinder.

2. Linear compressor with long life according to claim 1, characterized in that, The stator assembly further includes coil (4), the coil (4) is annularly set on the outer surface of the stator skeleton (3), the outside of the coil (4) is set with matched outer soft magnetic (5), and the outer soft magnetic (5) is connected with the stator skeleton (3).

3. Linear compressor with long life according to claim 1, characterized in that, The inner ring of the first leaf spring (2) and the second leaf spring (6) is fixed with piston (11) by screw (8), and the outer ring of the first leaf spring (2) and the second leaf spring (6) is fixed with stator skeleton (3) by screw (8).

4. The long-life linear compressor of claim 1, wherein The end of the piston (11) away from the base is closed, and the closed end is surrounded with the cylinder to form compression cavity.

5. The long-life linear compressor of claim 4, wherein, Gas flow channel is arranged in the cylinder along the axial direction, and gas outlet channel is arranged on the base along the radial direction, and the gas flow channel is communicated with the compression cavity and the gas outlet channel.

6. The long-life linear compressor of claim 2, wherein, The outer surface of the piston (11) is bonded with matched inner soft magnetic (10) corresponding to the position of the coil (4).

7. Linear compressor with long life according to claim 6, characterized in that The outer surface of the piston (11) has a groove, and the inner soft magnetic (10) is embedded in the groove, and the inner soft magnetic (10) is bonded with multiple groups, and multiple groups of the inner soft magnetic (10) are continuously wrapped around the outer surface of the piston.

8. Linear compressor with long life according to claim 6, characterized in that The outer surface of the inner soft magnetic (10) is bonded with multiple groups of magnetic steel (9), and multiple groups of magnetic steel (9) are spliced together to surround the inner soft magnetic (10) one round.

9. The long-life linear compressor of claim 1, wherein, Both ends of the housing (12) are sealingly provided with matched end cover (1), the end cover (1) is arc-shaped structure, and the inner side of the end cover (1) is recessed.

10. The long-life linear compressor of claim 1, wherein, The piston (11) is welded and fixed with the first leaf spring (2) and the second leaf spring (6), and the material of the piston (11) and the material of the first leaf spring (2) and the second leaf spring (6) are same.

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