Linear compressor resistant to high overloads

Abstract

The utility model relates to linear compressor technical field, concretely is a kind of linear compressor of high overload resistance, it mainly includes: shell;Cylinder seat, it is set in shell;Mover assembly, it is set in shell, and it is set on cylinder seat;Stator assembly, it is fixed on the cavity wall in shell, and it is set in mover assembly outside;First anti-collision part and second anti-collision part, both are set between the piston and the cylinder seat, first anti-collision part and the second anti-collision part are respectively used to limit the movement of mover assembly along axial two directions.The linear compressor of high overload resistance of the application by improving the structure of piston, on the basis of not changing original size, add first anti-collision part and second anti-collision part, so that piston can reduce mechanical collision risk when bearing high overload axial inertia force, to improve the reliability of refrigerating machine, ensure the service life of compressor.

Description

Technical Field

[0001] This utility model relates to the field of linear compressor technology, specifically to a linear compressor resistant to high overload. Background Technology

[0002] With the development of the times, linear Stirling refrigerators are increasingly widely used in civilian and military equipment such as infrared thermal imagers, infrared forward-looking and night vision, missile guidance, and space applications. The linear compressor is the core component of the linear Stirling refrigerator and is directly related to the performance of the entire refrigerator.

[0003] Conventional compressors use leaf springs as the source of mechanical stiffness for moving parts. When the compressor's rotor reciprocates, it drives the leaf spring to move as well. When the magnetic force on the rotor is greater than the spring force of the leaf spring, mechanical collision will occur. Mechanical collision increases the risk of damage to the compressor's mechanical structure, thereby reducing the compressor's lifespan. Utility Model Content

[0004] The purpose of this invention is to provide a linear compressor resistant to high overload, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-overload resistant linear compressor, comprising: shell; The cylinder block is located inside the housing; The mover assembly, housed within the housing, includes a piston, which is in sliding engagement with the cylinder seat; The stator assembly is fixed to the inner wall of the housing and sleeved outside the mover assembly; The first and second anti-collision components are both disposed between the piston and the cylinder seat. The first and second anti-collision components are used to restrict the movement of the mover assembly in two axial directions, respectively.

[0006] Preferably, the piston is annular, and an annular channel is provided on the cylinder seat. The cylinder seat has a compression core that extends into the piston. The compression core and the piston are fitted with a clearance, and the compression core and the piston enclose each other to form a compression chamber.

[0007] Preferably, a gas flow channel is provided through the axis of the compression core.

[0008] Preferably, a magnetic steel frame is welded to the end of the piston away from the cylinder seat, a large magnet is fixed on the inner wall of the magnetic steel frame, and an inner soft magnet is provided on the cylinder seat; a leaf spring is provided at the end of the magnetic steel frame away from the cylinder seat.

[0009] Preferably, the stator assembly includes a stator frame, which is fixed to the inner wall of the housing. A coil is disposed on the stator frame, and screw holes are provided on the stator frame. A corresponding through hole is provided on the leaf spring at the position corresponding to the stator frame.

[0010] Preferably, an outer soft magnet is provided on the stator frame, and the outer soft magnet is located between the coil and the outer shell.

[0011] Preferably, the linear compressor further includes an end cover, which is fixed to the end of the housing away from the cylinder seat; a first anti-collision member is used to prevent the piston from colliding with the end cover, and a second anti-collision member is used to prevent the piston from colliding with the cylinder seat.

[0012] Preferably, both the first and second anti-collision components are located near the end face of the piston close to the cylinder seat.

[0013] Preferably, the first anti-collision component includes a first placement groove, which is formed on the cylinder seat, and a second placement groove is formed at the position of the piston corresponding to the first placement groove. Small magnets are provided in the second placement groove and the first placement groove.

[0014] Preferably, the second anti-collision component includes a first protrusion connected to the cylinder seat and a second protrusion connected to the piston. A clearance groove is provided on the cylinder seat in the direction away from the piston. The second protrusion extends into the clearance groove, and the first protrusion extends toward the piston. Small magnets are provided at the ends of the first and second protrusions, and the two small magnets are arranged opposite to each other.

[0015] Preferably, the small magnets include a first pair of small magnets and a second pair of small magnets, both of which are radially magnetized. The first pair of small magnets is disposed in the second placement groove and the first placement groove, and the second pair of small magnets is disposed at the end of the second protrusion and the first protrusion.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This invention improves the piston structure by adding a first anti-collision component and a second anti-collision component without changing the original dimensions. Both the first and second anti-collision components are located between the piston and the cylinder seat, respectively, and are used to restrict the movement of the mover assembly in two axial directions. This reduces the risk of mechanical collision when the piston is subjected to high overload axial inertial force, thereby improving the reliability of the refrigeration machine and ensuring the life of the compressor. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a schematic diagram of the installation structure of the first small magnet pair; Figure 3 This is a schematic diagram of the installation structure for the second small magnet pair; Figure 4 This is a three-dimensional structural diagram of the cylinder block. Figure 5 This is a three-dimensional structural diagram of the moving part component.

[0018] In the diagram: 1. End cap; 2. Leaf spring; 3. Stator frame; 4. Coil; 5. Outer soft magnet; 6. Cylinder seat; 601. First placement slot; 602. First protrusion; 7. Outer shell; 8. Magnet frame; 9. Large magnet; 10. Piston; 1001. Second placement slot; 1002. Second protrusion; 11. Inner soft magnet; 12. Small magnet; 1201. First pair of small magnets; 1202. Second pair of small magnets. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0021] like Figures 1-5 As shown, this application provides a linear compressor resistant to high overload, comprising: a housing 7; a cylinder seat 6 disposed within the housing 7; a mover assembly disposed within the housing 7, including a piston 10, wherein the piston 10 is slidably engaged with the cylinder seat 6; a stator assembly fixed to the inner wall of the housing 7 and sleeved outside the mover assembly; a first anti-collision member and a second anti-collision member, both disposed between the piston and the cylinder seat 6, wherein the first anti-collision member and the second anti-collision member are respectively used to restrict the movement of the mover assembly in two axial directions.

[0022] Specifically, such as Figure 1 As shown, the piston 10 is annular, and an annular channel is provided on the cylinder seat 6. The cylinder seat 6 has a compression core that extends into the piston 10. The compression core and the piston 10 are clearance-fitted, and the compression core and the piston 10 enclose each other to form a compression cavity. A gas flow channel is provided through the axis of the compression core. A magnetic steel frame 8 is welded to the end of the piston 10 away from the cylinder seat 6. A large magnet 9 is fixed on the inner wall of the magnetic steel frame 8, and an inner soft magnet 11 is provided on the cylinder seat 6. A leaf spring 2 is provided at the end of the magnetic steel frame 8 away from the cylinder seat 6.

[0023] When the piston 10 moves away from the cylinder seat 6, the piston 10 draws gas into the compression chamber through the gas flow channel; conversely, it pushes the gas out through the air flow channel.

[0024] Specifically, such as Figure 1 As shown, the stator assembly includes a stator frame 3, which is fixed to the inner wall of the housing 7. A coil 4 is provided on the stator frame 3. Screw holes are provided on the stator frame 3, and corresponding through holes are provided on the leaf spring 2 at the corresponding positions of the stator frame 3. An external soft magnet 5 is provided on the stator frame 3, which is located between the coil 4 and the housing 7.

[0025] After the mover assembly is fully inserted, rotate the mover assembly so that the through hole on the leaf spring 2 coincides with the screw hole on the stator frame 3, thereby achieving the positioning effect. Then, fix the leaf spring 2 to the stator frame 3 with screws. Finally, seal the outer shell 7 with the end cover 1. When the coil 4 is energized with alternating current, a magnetic field is generated. The large magnet 9 is subjected to force, which drives the piston 10 and the leaf spring 2 to move together. The piston 10 and the leaf spring 2 move axially back and forth together.

[0026] Specifically, such as Figures 2-3 As shown, the linear compressor also includes an end cover 1, which is fixed to the end of the housing 7 away from the cylinder seat 6; a first anti-collision member is used to prevent the piston 10 from colliding with the end cover 1, and a second anti-collision member is used to prevent the piston 10 from colliding with the cylinder seat 6; both the first and second anti-collision members are located near the end face of the piston 10 close to the cylinder seat 6.

[0027] Specifically, such as Figure 2 As shown, the first anti-collision component includes a first placement groove 601, which is opened on the cylinder seat 6. The piston 10 is provided with a second placement groove 1001 at the position corresponding to the first placement groove 601. Small magnets 12 are provided in the second placement groove 1001 and the first placement groove 601.

[0028] Specifically, such as Figure 3 As shown, the second anti-collision component includes a first protrusion 602 connected to the cylinder seat 6 and a second protrusion 1002 connected to the piston 10. A clearance groove is provided on the cylinder seat 6 in the direction away from the piston 10. The second protrusion 1002 extends into the clearance groove. The first protrusion 602 extends toward the piston 10. Small magnets 12 are provided at the ends of the first protrusion 602 and the second protrusion 1002. The two small magnets 12 are arranged opposite to each other.

[0029] Specifically, such as Figures 2-3 As shown, the small magnet 12 includes a first small magnet pair 1201 and a second small magnet pair 1202, both of which are radially magnetized. The first small magnet pair 1201 is disposed in the second placement groove 1001 and the first placement groove 601, and the second small magnet pair 1202 is disposed at the end of the second protrusion 1002 and the first protrusion 602.

[0030] During assembly, the first small magnet pair 1201 is first bonded to the second placement groove 1001 and the first placement groove 601. After the first small magnet pair 1201 is assembled, the moving part assembly is assembled with the cylinder seat 6 at a certain angle to avoid interference between the first protrusion 602 and the second protrusion 1002, ensuring that the first protrusion 602 and the second protrusion 1002 of the "L"-shaped structure are staggered. When the piston 10 moves to the limit position in the direction of the end cover 1, the second small magnet pair 1202 is about to contact. The repulsive force of the magnetic field can generate a large axial rebound force to avoid mechanical collision. When the piston 10 moves to the limit position in the direction of the cylinder seat 6, the first small magnet pair 1201 is about to contact. The repulsive force of the magnetic field can generate a large axial rebound force to avoid mechanical collision.

[0031] The specific details of this plan are as follows: During assembly, the first small magnet pair 1201 is first bonded to the second placement groove 1001 and the first placement groove 601. After the first small magnet pair 1201 is assembled, the mover assembly is assembled with the cylinder seat 6 at a certain angle to avoid interference between the first protrusion 602 and the second protrusion 1002, and to ensure that the first protrusion 602 and the second protrusion 1002 of the "L" shaped structure are staggered. After the mover assembly is fully inserted, the mover assembly is rotated so that the through hole on the leaf spring 2 coincides with the screw hole on the stator frame 3, thereby achieving the positioning effect. The leaf spring 2 is fixed to the stator frame 3 by screws. Finally, the outer shell 7 is sealed by the end cover 1. When the coil 4 is energized with alternating current, it generates a magnetic field. The large magnet 9 is subjected to force, which drives the piston 10 and the leaf spring 2 to move together. The piston 10 and the leaf spring 2 reciprocate axially. When the piston 10 moves to its limit position towards the end cover 1, the second small magnet pair 1202 is about to contact. The repulsive force of the magnetic field can generate a large axial rebound force to avoid mechanical collision. When the piston 10 moves to its limit position towards the cylinder seat 6, the first small magnet pair 1201 is about to contact. The repulsive force of the magnetic field can generate a large axial rebound force to avoid mechanical collision. The above reciprocating motion will cause expansion and compression in the chamber between the piston 10 and the cylinder seat 6, which will drive the gas to flow through the air passage in the cylinder seat 6 and drive the expander piston. By improving the structure of the piston 10, without changing the original size, the first small magnet pair 1201 and the second small magnet pair 1202 are added, so that the piston 10 can reduce the risk of mechanical collision when subjected to high overload axial inertial force, thereby improving the reliability of the refrigeration machine and ensuring the life of the compressor.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; within the framework of this 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 this invention as described above, which are not provided in the details for the sake of brevity.

[0033] 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 linear compressor resistant to high overload, characterized in that, include: Outer shell (7); Cylinder seat (6) is disposed inside the housing (7); The actuator assembly, disposed within the housing (7), includes a piston (10), and the piston (10) is slidably engaged with the cylinder seat (6); The stator assembly is fixed on the inner wall of the housing (7) and sleeved on the outside of the mover assembly; The first anti-collision member and the second anti-collision member are both disposed between the piston and the cylinder seat (6). The first anti-collision member and the second anti-collision member are respectively used to restrict the movement of the moving part assembly in two axial directions.

2. A linear compressor resistant to high overload according to claim 1, characterized in that, The piston (10) is annular, and an annular channel is provided on the cylinder seat (6). The piston (10) is slidably disposed in the annular channel. The cylinder seat (6) has a compression core extending into the piston (10). The compression core and the piston (10) are in clearance fit. The compression core and the piston (10) enclose each other to form a compression cavity.

3. A linear compressor resistant to high overload according to claim 2, characterized in that, A gas flow channel is provided through the axis of the compression core.

4. A linear compressor resistant to high overload according to claim 1, characterized in that, A magnetic steel frame (8) is welded to the end of the piston (10) away from the cylinder seat (6). A large magnet (9) is fixed on the magnetic steel frame (8). An inner soft magnet (11) is provided on the cylinder seat (6). A leaf spring (2) is provided at the end of the magnetic steel frame (8) away from the cylinder seat (6).

5. A linear compressor resistant to high overload according to claim 4, characterized in that, The stator assembly includes a stator frame (3), which is fixed on the inner wall of the outer shell (7). A coil (4) is provided on the stator frame (3), and screw holes are provided on the stator frame (3). A corresponding through hole is provided on the leaf spring (2) at the position corresponding to the stator frame (3).

6. A linear compressor resistant to high overload according to claim 5, characterized in that, An external soft magnet (5) is provided on the stator frame (3), and the external soft magnet (5) is located between the coil (4) and the outer shell (7).

7. A linear compressor resistant to high overload according to claim 2, characterized in that, The linear compressor also includes an end cover (1), which is fixed to the end of the housing (7) away from the cylinder seat (6); the first anti-collision member is used to prevent the piston (10) from colliding with the end cover (1), and the second anti-collision member is used to prevent the piston (10) from colliding with the cylinder seat (6).

8. A linear compressor resistant to high overload according to claim 7, characterized in that, Both the first anti-collision member and the second anti-collision member are located near the end face of the piston (10) close to the cylinder seat (6).

9. A linear compressor resistant to high overload according to claim 8, characterized in that, The first anti-collision component includes a first placement groove (601), which is opened on the cylinder seat (6). The piston (10) is provided with a second placement groove (1001) at the position corresponding to the first placement groove (601). Small magnets (12) are provided in the second placement groove (1001) and the first placement groove (601).

10. A linear compressor resistant to high overload according to claim 8, characterized in that, The second anti-collision component includes a first protrusion (602) connected to the cylinder seat (6) and a second protrusion (1002) connected to the piston (10). The cylinder seat (6) is provided with a clearance groove along the direction away from the piston (10). The second protrusion (1002) extends into the clearance groove. The first protrusion (602) extends toward the piston (10). Small magnets (12) are provided at the ends of the first protrusion (602) and the second protrusion (1002). The two small magnets (12) are arranged opposite to each other.

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