High-efficiency and energy-saving reciprocating permanent magnet linear compressor

Abstract

The present invention relates to a high-efficiency and energy-saving reciprocating permanent magnet linear compressor, including a power mechanism and a compressor mechanism, wherein the power mechanism includes a rotor assembly and a stator assembly having an excitation coil and arranged in pairs. The rotor assembly includes a rotor body and a magnet assembly, wherein the rotor body is composed of two or more separately arranged parts, and along the moving direction of the rotor body, it presses against the magnet assembly from both sides to form a linkage, and the rotor body is linked to the piston rod. In the present invention, the separately arranged rotor body presses against the magnet assembly from both sides along the moving direction of the rotor body to form a linkage, and there is no need to provide support for the magnet assembly in the thickness direction, so the thickness of the magnet assembly part and the air gap spacing will not be additionally increased, which is more conducive to improving the magnetic field strength between the air gaps, enhancing the effective magnetic field of the compressor motor, and effectively improving the thrust and efficiency.

Description

Technical Field

[0001] The invention relates to a reciprocating permanent magnet linear compressor, in particular to a high-efficiency and energy-saving reciprocating permanent magnet linear compressor. Background Art

[0002] The existing reciprocating permanent magnet linear compressor generally includes a power mechanism and a compressor mechanism. The power mechanism includes a stator assembly and a mover assembly arranged in pairs with an excitation coil; the compressor mechanism includes a cylinder, a piston and a piston rod. The mover assembly includes a mover body and an annular magnet assembly, the annular magnet assembly is fixedly arranged on the mover body and is in the air gap between the two stator assemblies arranged in pairs, and the piston rod is fixedly connected to the mover body. By inputting an excitation current into the excitation coil, the stator assembly arranged in pairs generates a magnetic field, and under the interaction of the magnetic field and the annular magnet assembly, the mover assembly is driven to reciprocate and drive the piston rod and the piston to complete the cyclic suction and compression process. It can be seen from the principle of the reciprocating permanent magnet linear compressor that the stronger the magnetic field intensity generated by the stator assembly, the greater the power of the compressor. Without increasing the excitation current, reducing the air gap between the two stator assemblies will help to increase the magnetic field intensity, thereby increasing the power. However, in the existing reciprocating permanent magnet linear compressor, the annular magnet assembly in the rotor assembly is usually attached to the surface of the rotor body. Especially for the annular magnet assembly arranged in a ring shape, due to the thickness of the rotor body itself, the air gap between the two stator assemblies is increased, affecting the magnetic field strength, thereby reducing the power. Especially for high-power permanent magnet linear compressors, larger annular magnet assemblies are required, and thus thicker rotor body support is required, which has a greater impact on the power of the permanent magnet linear compressor. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a reciprocating permanent magnet linear compressor with a reasonable structure and higher efficiency.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency and energy-saving reciprocating permanent magnet linear compressor, comprising a power mechanism and a compressor mechanism, wherein the power mechanism comprises a rotor assembly and a stator assembly having an excitation coil and arranged in pairs, and the gap between the stator assemblies arranged in pairs forms an air gap; the rotor assembly comprises a rotor body and a magnet assembly, and the compressor mechanism comprises a cylinder body, a piston and a piston rod; it is characterized in that: the rotor body is composed of two or more separately arranged parts, the magnet assembly is movably arranged in the air gap of the stator assembly arranged in pairs, the two or more separately arranged parts of the rotor body are against the magnet assembly from both sides along the movement direction of the rotor body to form a linkage, the rotor assembly is movably arranged, and the rotor body is linked to the piston rod.

[0005] In the technical solution of the present invention, the separately arranged mover body presses against the magnet assembly from both sides along the movement direction of the mover body to form a linkage, and there is no need to provide support for the magnet assembly from the thickness direction. Therefore, the thickness of the magnet assembly part and the air gap spacing will not be increased additionally, which is more conducive to improving the magnetic field strength between the air gaps and enhancing the effective magnetic field of the compressor motor, thereby effectively improving the thrust and efficiency.

[0006] As a further configuration of the present invention: the stator assembly arranged in pairs is composed of an inner stator assembly and an outer stator assembly, the inner stator assembly and the outer stator assembly are both annular as a whole, the outer diameter of the inner stator assembly is smaller than the inner diameter of the outer stator assembly, the inner stator assembly is sleeved in the center of the outer stator assembly, and the gap between the inner stator assembly and the outer stator assembly constitutes an annular air gap; the magnet assembly is annular to constitute an annular magnet assembly, and the two parts of the separately arranged mover body are against the two side end faces of the annular magnet assembly from both axial sides to form a linkage. The inner stator assembly and the outer stator assembly are both annular as a whole, which is more conducive to obtaining greater thrust and power in a smaller overall machine volume.

[0007] As a further configuration of the present invention: the reciprocating permanent magnet linear compressor is provided with a group of stator assemblies arranged in pairs, a group of the compressor mechanisms, a linkage shaft and a base assembly; a stator cavity is fixedly provided on the base assembly, the stator assembly is arranged in the stator cavity, the linkage shaft is slidably arranged on the base assembly, the mover body is fixedly connected to the linkage shaft, the linkage shaft is linkage-connected to the piston rod, constituting a linkage connection between the mover body and the piston rod, forming a reciprocating permanent magnet linear single-cylinder compressor.

[0008] As a further arrangement of the present invention: the base assembly comprises a shaft sleeve, a left end plate and a right end plate that are adapted for the inner hole of the linkage shaft, the centers of the left end plate and the right end plate are provided with a shaft hole for the linkage shaft to penetrate, the left end plate and the right end plate are respectively fixedly arranged at the two ends of the shaft sleeve, the annular space surrounded by the left end plate, the right end plate and the shaft sleeve constitutes a stator cavity, the inner stator assembly and the outer stator assembly are arranged in the stator cavity, and the annular magnet assembly is arranged in the air gap between the inner stator assembly and the outer stator assembly; the mover body is composed of two separately arranged left movers and right movers, the left mover and the right mover are both cylindrical components with one end open and the other end provided with a bottom, the cross-sectional shape of the barrel wall of the left mover and the right mover is the same as the cross-sectional shape of the air gap and is clearance-matched, and a plurality of axial grooves are provided on the barrel wall at the open end of the left mover and the right mover, so that the front shape of the barrel wall of the left mover and the right mover The left and right movable members are provided with a plurality of top claws, and the corresponding positions of the left and right end plates are provided with slot holes matching the gaps of the top claws, and the top claws of the left mover and the right mover are respectively inserted into the air gaps from the slot holes of the left and right end plates, and press against the two end surfaces of the annular magnet assembly from both sides to form an axial linkage; the bottom centers of the left and right movers are provided with through holes for the linkage shaft to pass through, and the linkage shaft passes through the shaft sleeve, the shaft holes in the centers of the left and right end plates, and the through holes in the centers of the bottoms of the left and right movers, and the linkage shaft and the shaft sleeve are axially slidable relative to each other, and the two ends of the linkage shaft are respectively fixedly connected to the left mover and the right mover to form an axial linkage; the cylinder body is a cylindrical member with one end open and the other end provided with a bottom, and a cylinder chamber is provided inside, the open end of the cylinder body is opposite to and fixedly connected to the left end plate, the piston is arranged in the cylinder chamber, and the end of the linkage shaft passes through the through hole and is connected to the piston rod to form a linkage. Through the above arrangement, the mover body can well resist against the two end surfaces of the annular magnet assembly to form an axial linkage, and the structure is simple and the operation is reliable.

[0009] As a further configuration of the present invention: the reciprocating permanent magnet linear compressor is provided with a group of stator assemblies, linkage shafts, base assemblies and two groups of compressor mechanisms which are arranged in pairs; the two groups of compressor mechanisms respectively include a left cylinder body, a left piston and a left piston rod and a right cylinder body, a right piston and a right piston rod; a stator cavity is fixedly provided on the base assembly, the stator assembly is arranged in the stator cavity, the linkage shaft is slidably arranged on the base assembly, the mover body is fixedly connected to the linkage shaft, and the two ends of the linkage shaft are respectively linked to the left piston rod and the right piston rod, constituting a linkage connection between the mover body and the piston rod to form a reciprocating permanent magnet linear double-cylinder compressor.

[0010] As a further configuration of the present invention: the base assembly includes a shaft sleeve whose inner hole is adapted to the linkage shaft, a left end plate and a right end plate, the centers of the left end plate and the right end plate are provided with shaft holes for the linkage shaft to penetrate, the left end plate and the right end plate are respectively fixedly arranged at the two ends of the shaft sleeve, the annular space surrounded by the left end plate, the right end plate and the shaft sleeve constitute a stator cavity, the inner stator assembly and the outer stator assembly are arranged in the stator cavity, and the annular magnet assembly is arranged between the inner stator assembly and the outer stator assembly The mover body is composed of two separate left and right movers, each of which is a cylindrical member with an open end and a bottom at the other end. The cross-sectional shape of the cylinder wall of the left and right movers is the same as the cross-sectional shape of the air gap and is clearance-matched. The cylinder wall at the open end of the left and right movers is provided with a plurality of axial grooves, so that a plurality of top claws are formed at the front of the cylinder wall of the left and right movers, and the corresponding positions of the left end plate and the right end plate are provided with the top claws. The top claws of the left mover and the right mover are respectively inserted into the air gap from the slot holes of the left end plate and the right end plate, and press against the two end surfaces of the annular magnet assembly from both sides to form a linkage; a through hole for a linkage shaft to pass through is provided at the bottom center of the left mover and the right mover, and the linkage shaft passes through the shaft sleeve, the shaft hole in the center of the left end plate and the right end plate, and the through hole in the bottom center of the left mover and the right mover, and the linkage shaft and the shaft sleeve can be axially relatively slidably arranged, and the two ends of the linkage shaft are respectively The left mover and the right mover are fixedly connected to form an axial linkage; the left cylinder body and the right cylinder body are both cylindrical components with one end open and the other end provided with a bottom, and the left cylinder chamber and the right cylinder chamber are respectively provided inside, and the left cylinder body and the right cylinder body are arranged at the left and right ends, and the left cylinder body and the right cylinder body open ends are respectively opposite to and fixedly connected to the left end plate and the right end plate, and the left piston and the right piston are respectively arranged in the left cylinder chamber and the right cylinder chamber, and the two ends of the linkage shaft pass through the through hole and are respectively connected to the left piston rod and the right piston rod to form a linkage. Through the above arrangement, this high-efficiency and energy-saving reciprocating permanent magnet linear compressor can constitute a dual compressor, bidirectional work, and higher efficiency.

[0011] As a further configuration of the present invention: the reciprocating permanent magnet linear compressor is provided with two groups of stator assemblies arranged in pairs, two groups of annular magnet assemblies, a linkage shaft, a base assembly and two groups of compressor mechanisms; the two groups of compressor mechanisms respectively include a left cylinder body, a left piston and a left piston rod and a right cylinder body, a right piston and a right piston rod; two stator cavities are fixedly provided on the base assembly, the two groups of stator assemblies arranged in pairs are respectively arranged in the two stator cavities, the linkage shaft is slidably arranged on the base assembly, the mover body is fixedly connected to the linkage shaft, and the two ends of the linkage shaft are respectively linked to the left piston rod and the right piston rod, constituting a linkage connection between the mover body and the piston rod to form a reciprocating permanent magnet linear double-cylinder compressor.

[0012] As a further configuration of the present invention: the base assembly includes a shaft sleeve, a left end plate, a left middle plate, a right middle plate, and a right end plate, the inner hole of which is compatible with the linkage shaft; the mover body is composed of a left mover, a middle mover, and a right mover that are separately arranged; the centers of the left end plate, the left middle plate, the right middle plate, and the right end plate are provided with shaft holes for the linkage shaft to pass through, and the left end plate, the left middle plate, the right middle plate, and the right end plate are respectively and sequentially fixed on the shaft sleeve, and the annular space surrounded by the left end plate, the left middle plate, and the shaft sleeve constitute the left stator cavity, and the annular space surrounded by the right middle plate, the right end plate, and the shaft sleeve constitute the right stator cavity, and the left stator cavity The left and right stator cavities constitute the two stator cavities, the two groups of paired stator assemblies are respectively arranged in the left stator cavity and the right stator cavity, the two groups of annular magnet assemblies are respectively arranged in the air gaps of the two groups of stator assemblies, the left mover and the right mover are both cylindrical components with one end open and the other end provided with a bottom as a whole, the middle mover is a straight cylindrical component, the left mover, the middle mover and the right mover have the same diameter, and the cross-sectional shape of the cylinder wall is the same as the cross-sectional shape of the air gap and is clearance-matched, a plurality of axial grooves are provided on the cylinder walls at the open ends of the left mover and the right mover, so that a plurality of top claws are formed on the front parts of the cylinder walls of the left and right movers, and the two middle movers have the same diameter. The cylinder wall at the ends is also provided with a plurality of axial grooves to form a plurality of top claws, the middle mover is arranged between the left middle plate and the right middle plate, and the corresponding positions of the left end plate, the left middle plate, the right middle plate and the right end plate are provided with slot holes matching the gaps of the top claws, the top claws of the left mover, the middle mover and the right mover are respectively inserted into the air gap from the slot holes of the left end plate, the left middle plate, the right middle plate and the right end plate, and respectively press against the two end surfaces of the two groups of annular magnet assemblies from both sides to form a linkage; the bottom centers of the left mover and the right mover are provided with through holes for the linkage shaft to pass through, and the linkage shaft passes through the shaft sleeve, the left end plate, the left middle plate, the right middle plate The shaft hole in the center of the plate and the right end plate and the through hole in the center of the bottom of the left mover and the right mover and the inner hole of the middle mover, the linkage shaft and the shaft sleeve can be axially relatively slidably arranged, and the two ends of the linkage shaft are respectively fixedly connected with the left mover and the right mover to form an axial linkage; the left cylinder body and the right cylinder body are both cylindrical components with one end open and the other end provided with a bottom, and the left cylinder chamber and the right cylinder chamber are respectively provided inside, the open ends of the left cylinder body and the right cylinder body are respectively opposite to and fixedly connected with the left end plate and the right end plate, the left piston and the right piston are respectively arranged in the left cylinder chamber and the right cylinder chamber, and the two ends of the linkage shaft pass through the through hole and are respectively connected with the left piston rod and the right piston rod to form a linkage. By setting two groups of stator assemblies arranged in pairs and two groups of the annular magnet assemblies, the dual compressor can obtain double thrust, further improving the power.

[0013] As a further configuration of the present invention: the left cylinder body and the right cylinder body are both provided with a spring cavity, and an elastic member is provided in the spring cavity, and the elastic member respectively enables the mover assembly to have an elastic damping force opposite to the movement direction of the mover assembly, so that the piston, the elastic member and the mover assembly form an elastic system. Through the above configuration, when the excitation current frequency used by the stator is the same as the resonant frequency of the elastic system, the maximum compression stroke of the compressor can be achieved with the minimum energy consumption, so it is most efficient and energy-saving.

[0014] As a further configuration of the present invention: the elastic member is a helical compression spring, and a stepped shaft-shaped cavity is provided in the left cylinder body and the right cylinder body. The cavity with a smaller diameter in the stepped shaft-shaped cavity constitutes the cylinder chamber, and the cavity with a larger diameter in the stepped shaft-shaped cavity constitutes the spring cavity. The diameter of the spring cavity is clearance-matched with the diameter of the compression spring, the left mover and the right mover. One end of the compression spring elastically rests on the shoulder step of the cavity, and the other end elastically rests on the end face of the left mover or the right mover to form the elastic system.

[0015] As a further configuration of the present invention: a groove is provided on the shoulder of the cavity to match the clearance of the end of the compression spring, one end of the compression spring is in the groove, and the other end elastically rests on the end surface of the left mover or the right mover to form the elastic system.

[0016] As a further configuration of the present invention: the magnet assembly as a whole is composed of permanent magnets.

[0017] As a further configuration of the present invention: the magnet assembly includes a bracket and a plurality of permanent magnets, and the plurality of permanent magnets are embedded in the bracket. The bracket is composed of an annular component whose thickness matches the air gap and whose clearance matches. A plurality of rectangular notches are evenly spaced on the edge of the bracket, and arc-shaped grooves are arranged on both sides of the notch. The permanent magnet is a tile-shaped one whose shape and thickness match the notch, and whose curvature matches the diameter of the bracket. The cross-section of the edges on both sides is arc-shaped, which matches the arc-shaped grooves on both sides of the notch. The permanent magnet is inserted in the notch to form the annular magnet assembly. By arranging a bracket to embed a plurality of permanent magnets to form a magnet assembly, the cost can be reduced and the manufacturing can be facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a cross-sectional view of the internal structure of a specific embodiment 1 of the present invention;

[0019] Figure 2 This is a cross-sectional view of the internal structure of a specific embodiment 2 of the present invention;

[0020] Figure 3 This is one of the partial exploded views of the structure of the specific embodiment 2 of the present invention;

[0021] Figure 4This is the second partial exploded view of the structure of the specific embodiment 2 of the present invention;

[0022] Figure 5 This is the third partial exploded view of the structure of the specific embodiment 2 of the present invention;

[0023] Figure 6 This is a schematic diagram of the three-dimensional structure of a base assembly according to a specific embodiment 2 of the present invention;

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of a specific embodiment of the left mover and the right mover of the present invention;

[0025] Figure 8 This is a schematic diagram of the three-dimensional structure of the appearance of specific embodiment 3 of the present invention;

[0026] Fig. 9 This is a cross-sectional view of the internal structure of a specific embodiment 3 of the present invention;

[0027] Fig.10 Schematic diagram of the three-dimensional structure of the base assembly of the specific embodiment 3 of the present invention

[0028] Fig.11 This is one of the partial exploded views of the structure of the specific embodiment 3 of the present invention;

[0029] Fig.12 This is the second partial exploded view of the structure of the specific embodiment 3 of the present invention;

[0030] Fig.13 It is a schematic diagram of the three-dimensional structure of a specific embodiment of a magnet assembly of the present invention;

[0031] Fig.14 It is a structural exploded view of a specific embodiment of the magnet assembly of the present invention. DETAILED DESCRIPTION

[0032] The high-efficiency and energy-saving reciprocating permanent magnet linear compressor of the present invention comprises a power mechanism and a compressor mechanism, wherein the power mechanism comprises a mover assembly and a stator assembly having an excitation coil and arranged in pairs. The stator assemblies arranged in pairs can be arranged in pairs up and down or in pairs inside and outside of a concentric ring, and the gap between the stator assemblies arranged in pairs forms an air gap. The compressor mechanism comprises a cylinder body, a piston and a piston rod. The mover assembly comprises a mover body and a magnet assembly, wherein the mover body is composed of two or more parts arranged separately, wherein the two or more parts arranged separately press against the magnet assembly from both sides along the moving direction of the mover body to form a linkage, wherein the mover assembly is movably arranged, wherein the magnet assembly is movably arranged in the air gap of the stator assembly arranged in pairs, wherein the mover body is linked to the piston rod, and the piston rod and the piston are driven to reciprocate to complete the compressor function. If the compressor mechanism is arranged at only one end, a single-cylinder reciprocating permanent magnet linear compressor can be constituted, and if the compressor mechanism is arranged at both ends, a double-cylinder reciprocating permanent magnet linear compressor can be constituted.

[0033] The stator assembly arranged in pairs of concentric annular inner and outer parts is preferably composed of an inner stator assembly and an outer stator assembly, the inner stator assembly and the outer stator assembly are both annular as a whole, preferably circular, the outer diameter of the inner stator assembly is smaller than the inner diameter of the outer stator assembly, the inner stator assembly is concentrically sleeved in the center of the outer stator assembly, and the gap between the inner stator assembly and the outer stator assembly constitutes the air gap; the magnet assembly is annular to constitute an annular magnet assembly, and the two parts of the separately arranged mover body press against the two side end faces of the annular magnet assembly from both sides of the axial direction to form a linkage.

[0034] The present invention will be further described below in conjunction with the accompanying drawings and preferred specific embodiments. Specific embodiment 1:

[0036] This specific embodiment takes a high-efficiency and energy-saving reciprocating permanent magnet linear single-cylinder compressor as an example, which includes a power mechanism, a linkage shaft 4, a base assembly and a set of compressor mechanisms.

[0037] like Figure 1 As shown, the base assembly includes a shaft sleeve 1, an inner hole of which is adapted to the linkage shaft 4, a left end plate 2 and a right end plate 3. The diameters of the left end plate 2 and the right end plate 3 are preferably the same as the diameter of the outer stator assembly. The left end plate 2 and the right end plate 3 are symmetrically arranged. The centers of the left end plate 2 and the right end plate 3 are provided with shaft holes 17 for the linkage shaft 4 to pass through. The left end plate 2 and the right end plate 3 can be fixedly arranged at both ends of the shaft sleeve 1 by means of tightening nuts 5 or tight fitting. The annular space enclosed by the left end plate 2, the right end plate 3 and the shaft sleeve 1 constitutes a stator cavity 6.

[0038] The power mechanism includes a moving component and a stator component having an excitation coil and arranged in pairs. The stator component is composed of an inner stator component 7 and an outer stator component 8. The inner stator component 7 and the outer stator component 8 are both annular in shape. The outer diameter of the inner stator component 7 is smaller than the inner aperture of the outer stator component 8. The inner stator component 7 is concentrically sleeved in the center of the outer stator component 8. The inner aperture of the inner stator component 7 is matched with the outer diameter of the shaft sleeve 1. The stator component composed of the inner stator component 7 and the outer stator component 8 is arranged in the stator cavity 6. The gap between the inner stator component 7 and the outer stator component 8 constitutes the air gap 9.

[0039] The mover assembly includes a mover body and a magnet assembly 10. The magnet assembly 10 is annular and constitutes an annular magnet assembly 10. The diameter and thickness of the magnet assembly 10 match the air gap 9 and the clearance fits, so that it can reciprocate in the air gap 9. The magnet assembly 10 can be composed of an annular permanent magnet of a corresponding shape as a whole; the magnet assembly 10 can also include a bracket 1001 and a plurality of permanent magnets 1002, and the plurality of permanent magnets 1002 are embedded in the bracket 1001. This specific embodiment adopts this method. Specifically, the bracket 1001 can be composed of an annular component with a thickness matching the air gap 9 and a clearance matching, preferably composed of a metal ring made of non-magnetic metal such as a stainless steel strip. A number of rectangular notches 1003 are evenly spaced at the edge of the bracket 1001, and arc-shaped grooves are arranged on both sides of the notch 1003. The permanent magnet 1002 is in the shape and thickness matching the notch 1003, and the curvature matches the diameter of the bracket 1001. The cross-sections of the edges on both sides are arc-shaped, matching the arc-shaped grooves on both sides of the notch 1003. The permanent magnet 1002 is inserted in the notch 1003 to form the annular magnet assembly 10, and the annular magnet assembly 10 is arranged in the air gap 9 between the inner stator assembly 7 and the outer stator assembly 8.

[0040] In this specific embodiment, Figure 7As shown, the mover body is composed of two separate left movers 11 and right movers 12. The left mover 11 and the right mover 12 are both cylindrical components with one end open and the other end provided with a bottom, and the two are symmetrically arranged. The cross-sectional shape of the cylinder wall of the left mover 11 and the right mover 12 is the same as the cross-sectional shape of the air gap 9 and the diameters are matched to form a clearance fit. The cylinder wall of the open end of the left mover 11 and the right mover 12 is provided with a plurality of axial grooves 13, and the grooves 13 are preferably evenly distributed, so that the front part of the cylinder wall of the left mover 11 and the right mover 12 is formed with a plurality of top claws 14, and the corresponding positions of the left end plate 2 and the right end plate 3 are provided with slot holes 16 matching the gap of the top claws 14, and the top claws 14 of the left mover 11 and the right mover 12 are respectively inserted into the air gap 9 from the slot holes 16 of the left end plate 2 and the right end plate 3, and form an axial linkage by pressing against the two side end faces of the annular magnet assembly 10 from both sides.

[0041] A through hole 15 for the linkage shaft 4 to pass through is provided at the bottom center of the left mover 11 and the right mover 12. The left mover 11 and the right mover 12 are coaxially arranged on the outside of the left end plate 2 and the right end plate 3. The linkage shaft 4 passes through the shaft sleeve 1, the shaft hole 17 in the center of the left end plate 2 and the right end plate 3, and the through hole 15 in the bottom center of the left mover 11 and the right mover 12. The linkage shaft 4 and the shaft sleeve 1 are axially slidable relative to each other, and the two ends of the linkage shaft 4 are respectively fixedly connected to the left mover 11 and the right mover 12 to form an axial linkage.

[0042] The compressor mechanism includes a cylinder body 18, a piston 19 and a piston rod 20. The cylinder body 18 is a cylindrical component with an opening at one end and a bottom at the other end, and a cylinder chamber 1801 is provided inside. The diameter of the open end is preferably the same as the diameter of the left end plate 2 and the right end plate 3. The open end of the cylinder body 18 is opposite to and fixedly connected to the left end plate 2 or the right end plate 3. In this specific embodiment, the open end of the cylinder body 18 is opposite to and fixedly connected to the right end plate 3, and an end cover 34 is fixedly connected to the left end plate 2. The center of the end cover 34 is provided with an axial hole that slides with the end of the linkage shaft 4. The piston 19 is arranged in the cylinder chamber 1801, and the two ends of the linkage shaft 4 pass through the through hole 15. One end is connected to the piston rod 20 to form a linkage, and the other end slides in the axial hole in the center of the end cover 34 to form a reciprocating permanent magnet linear single-cylinder compressor. Specific embodiment 2:

[0044] This specific embodiment takes a high-efficiency and energy-saving reciprocating permanent magnet linear double-cylinder compressor as an example. Figure 2As shown, the high-efficiency and energy-saving reciprocating permanent magnet linear twin-cylinder compressor comprises a power mechanism, a linkage shaft 4, a base assembly and two sets of compressor mechanisms. The base assembly is fixedly provided with a stator cavity, the stator assembly is arranged in the stator cavity, the linkage shaft is slidably arranged on the base assembly, the mover body is fixedly connected to the linkage shaft, and the two ends of the linkage shaft are respectively linked to the left piston rod and the right piston rod, forming a linkage connection between the mover body and the piston rod to form a reciprocating permanent magnet linear twin-cylinder compressor.

[0045] like Figure 3-5 As shown, in this specific embodiment, the base assembly includes a shaft sleeve 1, a left end plate 2 and a right end plate 3, the diameters of the left end plate 2 and the right end plate 3 are preferably the same as the diameter of the outer stator assembly, the left end plate 2 and the right end plate 3 are symmetrically arranged, and the centers of the left end plate 2 and the right end plate 3 are provided with shaft holes 17 for the linkage shaft 4 to penetrate, the left end plate 2 and the right end plate 3 can be fixedly arranged at both ends of the shaft sleeve 1 by means of a clamping nut 5 or a tight fit, and the annular space enclosed by the left end plate 2, the right end plate 3 and the shaft sleeve 1 constitutes a stator cavity 6, as shown in FIG. Figure 6 shown.

[0046] The power mechanism includes a moving component and a stator component having an excitation coil and arranged in pairs. The stator component is composed of an inner stator component 7 and an outer stator component 8. The inner stator component 7 and the outer stator component 8 are both annular in shape. The outer diameter of the inner stator component 7 is smaller than the inner aperture of the outer stator component 8. The inner stator component 7 is concentrically sleeved in the center of the outer stator component 8. The inner aperture of the inner stator component 7 is matched with the outer diameter of the shaft sleeve 1. The stator component composed of the inner stator component 7 and the outer stator component 8 is arranged in the stator cavity 6. The gap between the inner stator component 7 and the outer stator component 8 constitutes the air gap 9.

[0047] The mover assembly includes a mover body and a magnet assembly 10. The magnet assembly 10 is annular and constitutes an annular magnet assembly 10. The diameter and thickness of the magnet assembly 10 match the air gap 9 and the clearance fits, so that it can reciprocate in the air gap 9. The magnet assembly 10 can be composed of corresponding annular permanent magnets as a whole; the magnet assembly 10 can also include a bracket 1001 and a plurality of permanent magnets 1002, and the plurality of permanent magnets 1002 are embedded in the bracket 1001. This specific embodiment adopts this method. Specifically, the bracket 1001 can be composed of an annular component with a thickness matching the air gap 9 and a clearance fit. A number of rectangular notches 1003 are evenly spaced on the edge of the bracket 1001, and arc-shaped grooves are arranged on both sides of the notch 1003. The permanent magnet 1002 is a tile-shaped component with a shape and thickness matching the notch 1003, and a curvature matching the diameter of the bracket 1001. The cross-sections of the edges on both sides are arc-shaped, matching the arc-shaped grooves on both sides of the notch 1003. The permanent magnet 1002 is inserted in the notch 1003 to form the annular magnet assembly 10, and the annular magnet assembly 10 is arranged in the air gap 9 between the inner stator assembly 7 and the outer stator assembly 8.

[0048] In this specific embodiment, the mover body is composed of two separate left movers 11 and right movers 12. The left mover 11 and the right mover 12 are both cylindrical components with one end open and the other end provided with a bottom, and the two are symmetrically arranged. The cross-sectional shape of the cylinder wall of the left mover 11 and the right mover 12 is the same as the cross-sectional shape of the air gap 9 and the diameters are matched to form a clearance fit. The cylinder wall of the open end of the left mover 11 and the right mover 12 is provided with a plurality of axial grooves 13, and the grooves 13 are evenly distributed, so that the front part of the cylinder wall of the left mover 11 and the right mover 12 is formed with a plurality of top claws 14, and the corresponding positions of the left end plate 2 and the right end plate 3 are provided with slot holes 16 matching the gap of the top claws 14, and the top claws 14 of the left mover 11 and the right mover 12 are respectively inserted into the air gap 9 from the slot holes 16 of the left end plate 2 and the right end plate 3, and the two side end faces of the annular magnet assembly 10 are pressed against each other from both sides to form an axial linkage.

[0049] A through hole 15 for the linkage shaft 4 to pass through is provided at the bottom center of the left mover 11 and the right mover 12. The left mover 11 and the right mover 12 are coaxially arranged on the outside of the left end plate 2 and the right end plate 3. The linkage shaft 4 passes through the shaft sleeve 1, the shaft hole 17 in the center of the left end plate 2 and the right end plate 3, and the through hole 15 in the bottom center of the left mover 11 and the right mover 12. The linkage shaft 4 and the shaft sleeve 1 are axially slidable relative to each other, and the two ends of the linkage shaft 4 are respectively fixedly connected to the left mover 11 and the right mover 12 to form an axial linkage.

[0050] The two groups of compressor mechanisms respectively include a left cylinder 21, a left piston 22 and a left piston rod 23 and a right cylinder 24, a right piston 25 and a right piston rod 26; the left cylinder 21 and the right cylinder 24 are both cylindrical components with an opening at one end and a bottom at the other end. The left cylinder 21 and the right cylinder 24 preferably have the same structure and are symmetrically arranged. The diameters of the opening ends of the left cylinder 21 and the right cylinder 24 are preferably the same as the diameters of the left end plate 2 and the right end plate 3. The left cylinder 21 is provided with a left Cylinder chamber 2101, the right cylinder body 24 is provided with a left cylinder chamber 2401 inside, the opening ends of the left cylinder body 21 and the right cylinder body 24 are respectively opposite to and fixedly connected with the left end plate 2 and the right end plate 3, the left piston 22 is arranged in the left cylinder chamber 2101, the right piston 23 is arranged in the right cylinder chamber 2401, the end of the linkage shaft 4 passes through the through hole 15 and is respectively connected with the left piston rod 23 and the right piston rod 26 to form a linkage, forming a reciprocating permanent magnet linear double cylinder compressor. After forming a double compressor, it can work in both directions, and the efficiency is higher.

[0051] In order to further improve the efficiency of the compressor, it is preferred that a spring cavity 27 is provided in the left cylinder body 21 and the right cylinder body 24, and an elastic member 28 is provided in the spring cavity 27. The elastic member 28 respectively enables the mover assembly to have an elastic damping force opposite to the movement direction of the mover assembly, so that the piston, the piston rod, the elastic member 28 and the mover assembly form an elastic system.

[0052] Specifically, in this embodiment, the elastic member 28 is a helical compression spring, and a stepped shaft-shaped cavity is provided in the left cylinder body 21 and the right cylinder body 24. The cavity with a smaller diameter in the stepped shaft-shaped cavity constitutes the cylinder chamber, and the cavity with a larger diameter in the stepped shaft-shaped cavity constitutes the spring cavity 27. The diameter of the spring cavity 27 is matched with the diameter clearance of the compression spring, the left mover 11 and the right mover 12. One end of the compression spring elastically rests on the shoulder step 29 of the cavity, and the other end elastically rests on the end face of the left mover 11 or the right mover 12 to form the elastic system.

[0053] A groove 30 is provided on the shoulder 29 of the cavity to match the clearance of the end of the compression spring. One end of the compression spring is in the groove 30, and the other end elastically rests on the end surface of the left mover 11 or the right mover 12 to form the elastic system.

[0054] The high-efficiency and energy-saving permanent magnet linear twin-cylinder compressor of the present invention sets a pair of elastic parts in the linear motor twin-cylinder compressor, respectively making the mover have an elastic damping force opposite to the moving direction of the mover, so that the piston, the pair of elastic parts and the mover form an elastic system, and the excitation current frequency of the stator matches the resonant frequency of the elastic system. Through the above arrangement, when the excitation current frequency used by the stator is the same as the resonant frequency of the elastic system, the maximum compression stroke of the compressor can be achieved with the minimum energy consumption, so it is most efficient and energy-saving. Specific embodiment 3:

[0056] The present invention can also conveniently increase the thrust and improve the compressor power by increasing the number of stator assemblies. That is, two groups of stator assemblies arranged in pairs, two groups of annular magnet assemblies, linkage shafts, base assemblies and two groups of compressor mechanisms are provided in the reciprocating permanent magnet linear compressor; the two groups of compressor mechanisms respectively include a left cylinder body, a left piston and a left piston rod and a right cylinder body, a right piston and a right piston rod; two stator cavities are fixedly provided on the base assembly, the two groups of stator assemblies arranged in pairs are respectively arranged in the two stator cavities, the linkage shaft is slidably provided on the base assembly, the mover body is fixedly connected to the linkage shaft, and the two ends of the linkage shaft are respectively linked to the left piston rod and the right piston rod, forming a linkage connection between the mover body and the piston rod, forming a reciprocating permanent magnet linear double-cylinder compressor.

[0057] This specific embodiment takes a dual-thrust reciprocating permanent magnet linear double-cylinder compressor as an example, which includes a power mechanism, a linkage shaft 4, a base assembly and two sets of compressor mechanisms.

[0058] like Figure 8-12As shown, the base assembly includes a shaft sleeve 1, a left end plate 2, a left middle plate 32, a right middle plate 33 and a right end plate 3, the diameters of the left end plate 2, the left middle plate 32, the right middle plate 33 and the right end plate 3 are preferably the same as the diameter of the outer stator assembly, the left middle plate 32 and the right middle plate 33 and the left end plate 2 and the right end plate 3 are respectively symmetrically arranged, the shaft sleeve 1 includes a left shaft sleeve 101 and a right shaft sleeve 102, the centers of the left end plate 2, the left middle plate 32, the right middle plate 33 and the right end plate 3 are provided with a shaft hole 17 for the linkage shaft 4 to penetrate, the left end plate 2 and the left middle plate 32 can be fixedly arranged at the two ends of the left shaft sleeve 101 by means of a tightening nut 5 or a tight fit, and the annular space surrounded by the left end plate 2, the left middle plate 32 and the left shaft sleeve 101 constitutes the left stator cavity 601; the right middle plate 33 and the right end plate 3 can be fixedly arranged at the two ends of the right shaft sleeve 102 by means of a tightening nut 5 or a tight fit, and the annular space surrounded by the right middle plate 33, the right end plate 3 and the right shaft sleeve 102 constitutes the right stator cavity 602, and the left stator cavity 601 and the right stator cavity 602 constitute the two stator cavities.

[0059] In this specific embodiment, the power mechanism includes a mover assembly and two groups of stator assemblies, namely a left stator assembly and a right stator assembly. The left stator assembly is composed of a left inner stator assembly 701 and a left outer stator assembly 801. The left inner stator assembly 701 and the left outer stator assembly 801 are both annular in shape as a whole. The outer diameter of the left inner stator assembly 701 is smaller than the inner aperture of the left outer stator assembly 801. The left inner stator assembly 701 is concentrically sleeved in the center of the left outer stator assembly 801. The inner aperture of the left inner stator assembly 701 is matched with the outer diameter of the left shaft sleeve 101. The left stator assembly composed of the left inner stator assembly 701 and the left outer stator assembly 801 is arranged in the left stator cavity 601. The gap between the left inner stator assembly 701 and the left outer stator assembly 801 constitutes the air gap 9.

[0060] Similarly, the right inner stator assembly 702 and the right outer stator assembly 802 are both circular in shape as a whole, the outer diameter of the right inner stator assembly 702 is smaller than the inner aperture of the right outer stator assembly 802, the right inner stator assembly 702 is concentrically sleeved in the center of the right outer stator assembly 802, the inner aperture of the right inner stator assembly 702 is adapted to the outer diameter of the right shaft sleeve 102, the right stator assembly composed of the right inner stator assembly 702 and the right outer stator assembly 802 is arranged in the right stator cavity 602, and the gap between the right inner stator assembly 702 and the right outer stator assembly 802 constitutes the air gap 9.

[0061] The mover assembly includes a mover body and two sets of magnet assemblies 10, and the two sets of magnet assemblies 10 preferably have the same structure. The magnet assembly 10 is annular, and the diameter and thickness of the magnet assembly 10 match the air gap 9 and the clearance is matched, so that it can reciprocate in the air gap 9. The magnet assembly 10 can be composed of corresponding annular permanent magnets as a whole, such as Fig.13 , 14 As shown, the magnet assembly 10 may also be composed of a bracket 1001 and a plurality of permanent magnets 1002, wherein the plurality of permanent magnets 1002 are embedded in the bracket 1001, and this specific embodiment adopts this method. Specifically, the bracket 1001 may be composed of an annular member having a thickness matching the air gap 9 and a clearance match, a plurality of rectangular notches 1003 are evenly spaced at the edge of the bracket 1001, and arc-shaped grooves are arranged on both sides of the notch 1003, the permanent magnet 1002 is a tile-shaped member having a shape and thickness matching the notch 1003, and a curvature matching the diameter of the bracket 1001, and the cross-section of the edges on both sides is an arc, matching the arc-shaped grooves on both sides of the notch 1003, and the permanent magnet 1002 is inserted in the notch 1003 to form the annular magnet assembly 10, and the annular magnet assembly 10 is arranged in the air gap 9 between the inner stator assembly 7 and the outer stator assembly 8.

[0062] In this specific embodiment, the mover body is composed of three separate parts: a left mover 11, a middle mover 31, and a right mover 12. The left mover 11 and the right mover 12 are both straight cylindrical components with one end open and the other end provided with a bottom, and the two are symmetrically arranged. The middle mover 31 is a straight cylindrical component with two ends open. The left mover, the middle mover 31, and the right mover have the same diameter, and the cross-sectional shape of the cylinder wall is the same as the cross-sectional shape of the air gap and the clearance is matched.

[0063] The cylinder walls at the open ends of the left mover and the right mover are provided with a plurality of axial grooves, so that a plurality of top claws are formed at the front of the cylinder walls of the left mover and the right mover. The middle mover 31 is arranged between the left middle plate and the right middle plate. The cylinder walls at both ends of the middle mover 31 are also provided with a plurality of axial grooves to form a plurality of top claws. The corresponding positions of the left end plate, the left middle plate, the right middle plate and the right end plate are provided with slot holes matching the gaps of the top claws. The top claws of the left mover, the middle mover 31 and the right mover are respectively connected from the left end plate, the left middle plate, the right middle plate and the left end plate. The slot holes of the middle plate and the right end plate are inserted into the air gap, and the two end surfaces of the two groups of annular magnet assemblies are respectively pressed against each other from both sides to form a linkage; a through hole for the linkage shaft to pass through is provided at the bottom center of the left mover and the right mover, and the linkage shaft passes through the shaft sleeve, the left end plate, the left middle plate, the right middle plate and the shaft hole in the center of the right end plate, the through hole in the center of the bottom of the left mover and the right mover, and the inner hole of the middle mover 31, and the linkage shaft and the shaft sleeve can be axially relatively slidably arranged, and the two ends of the linkage shaft are respectively fixedly connected to the left mover and the right mover to form an axial linkage;

[0064] The two groups of compressor mechanisms respectively include a left cylinder 21, a left piston 22 and a left piston rod 23 and a right cylinder 24, a right piston 25 and a right piston rod 26; the left cylinder 21 and the right cylinder 24 are both cylindrical components with an opening at one end and a bottom at the other end. The left cylinder 21 and the right cylinder 24 preferably have the same structure and are symmetrically arranged. The diameters of the opening ends of the left cylinder 21 and the right cylinder 24 are preferably the same as the diameters of the left end plate 2 and the right end plate 3. The left cylinder 21 is provided with a left Cylinder chamber 2101, a left cylinder chamber 2401 is provided inside the right cylinder body 24, the opening ends of the left cylinder body 21 and the right cylinder body 24 are respectively opposite to and fixedly connected with the left end plate 2 and the right end plate 3, the left piston 22 is arranged in the left cylinder chamber 2101, the right piston 23 is arranged in the right cylinder chamber 2401, the end of the linkage shaft 4 passes through the through hole 15 and is respectively connected with the left piston rod 23 and the right piston rod 26 to form a linkage, forming a reciprocating permanent magnet linear double-cylinder compressor.

[0065] In order to further improve the efficiency of the compressor, in this specific embodiment, it is also preferably arranged so that the piston, the piston rod, the elastic member 28 and the mover assembly form an elastic system. The specific structure is the same as the above embodiment and will not be repeated here.

[0066] The present invention is not limited to the above-mentioned specific implementation modes, but also includes other various equivalent specific implementation modes that can be adopted by those skilled in the art based on the contents disclosed in the present invention. Any simple changes or modifications made by adopting the design structure and concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-efficiency and energy-saving reciprocating permanent magnet linear compressor, comprising a power mechanism and a compressor mechanism, wherein the power mechanism comprises a mover assembly and a stator assembly having an excitation coil and arranged in pairs, wherein the gap between the stator assemblies arranged in pairs forms an air gap; the mover assembly comprises a mover body and a magnet assembly, and the compressor mechanism comprises a cylinder body, a piston and a piston rod; characterized in that: The mover body is composed of two or more separately arranged parts, the magnet assembly is movably arranged in the air gap of the stator assembly arranged in pairs, the two or more separately arranged parts of the mover body press against the magnet assembly from both sides along the moving direction of the mover body to form a linkage, the mover assembly is movably arranged, and the mover body is linked with the piston rod; the stator assembly arranged in pairs is composed of an inner stator assembly and an outer stator assembly, the inner stator assembly and the outer stator assembly are both annular as a whole, the outer diameter of the inner stator assembly is smaller than the inner diameter of the outer stator assembly, the inner stator assembly is sleeved in the center of the outer stator assembly, and the gap between the inner stator assembly and the outer stator assembly constitutes an annular air gap; the magnet The assembly is annular and constitutes an annular magnet assembly. The two parts of the split mover body are against the end faces of the annular magnet assembly from both sides of the axial direction to form a linkage; the reciprocating permanent magnet linear compressor is provided with a group of stator assemblies arranged in pairs, a group of compressor mechanisms, a linkage shaft and a base assembly; a stator cavity is fixedly provided on the base assembly, the stator assembly is arranged in the stator cavity, the linkage shaft is slidably arranged on the base assembly, the mover body is fixedly connected to the linkage shaft, and the linkage shaft is linked to the piston rod, forming a linkage connection between the mover body and the piston rod to form a reciprocating permanent magnet linear single-cylinder compressor; the base assembly includes a shaft sleeve with an inner hole adapted to the linkage shaft, a left The left and right end plates are each provided with an axial hole for the linkage shaft to pass through in the center thereof, and the left and right end plates are respectively fixedly arranged at the two ends of the shaft sleeve, and the annular space surrounded by the left and right end plates and the shaft sleeve constitutes a stator cavity, and the inner stator assembly and the outer stator assembly are arranged in the stator cavity, and the annular magnet assembly is arranged in the air gap between the inner stator assembly and the outer stator assembly; the mover body is composed of two separately arranged left and right movers, and the left and right movers are both cylindrical components that are integrally formed with one end open and the other end provided with a bottom, and the cross-sectional shape of the cylinder wall of the left and right movers is the same as the cross-sectional shape of the air gap and is clearance-matched, and the cylinder wall of the left and right movers at the open end thereof is provided with A plurality of axial grooves are provided so that a plurality of top claws are formed on the front part of the cylinder wall of the left mover and the right mover, and slot holes matching the gaps of the top claws are provided at corresponding positions of the left end plate and the right end plate, and the top claws of the left mover and the right mover are respectively inserted into the air gap from the slot holes of the left end plate and the right end plate, and press against the two end surfaces of the annular magnet assembly from both sides to form an axial linkage; a through hole is provided at the bottom center of the left mover and the right mover for the linkage shaft to pass through, and the linkage shaft passes through the shaft sleeve, the shaft hole at the center of the left end plate and the right end plate, and the through hole at the bottom center of the left mover and the right mover, and the linkage shaft and the shaft sleeve can be axially slidably arranged relative to each other, and the two ends of the linkage shaft are respectively fixedly connected to the left mover and the right mover to form an axial linkage;The cylinder body is a cylindrical member with one end open and the other end provided with a bottom, and a cylinder chamber is provided inside. The open end of the cylinder body is opposite to and fixedly connected with the left end plate, and the piston is arranged in the cylinder chamber. The end of the linkage shaft passes through the through hole and is connected with the piston rod to form a linkage. ; 2. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 1 is characterized in that: The reciprocating permanent magnet linear compressor is provided with a set of stator assemblies, linkage shafts, base assemblies and two sets of compressor mechanisms which are arranged in pairs; the two sets of compressor mechanisms respectively include a left cylinder body, a left piston and a left piston rod and a right cylinder body, a right piston and a right piston rod; a stator cavity is fixedly provided on the base assembly, the stator assembly is arranged in the stator cavity, the linkage shaft is slidably arranged on the base assembly, the mover body is fixedly connected to the linkage shaft, and the two ends of the linkage shaft are respectively linked to the left piston rod and the right piston rod, so that the mover body and the piston rod are linked and connected to form a reciprocating permanent magnet linear double-cylinder compressor.

3. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 2 is characterized in that: The base assembly includes a shaft sleeve whose inner hole is adapted to the linkage shaft, a left end plate and a right end plate, wherein the centers of the left end plate and the right end plate are provided with shaft holes for the linkage shaft to penetrate, and the left end plate and the right end plate are respectively fixedly arranged at the two ends of the shaft sleeve, and the annular space surrounded by the left end plate, the right end plate and the shaft sleeve constitute a stator cavity, the inner stator assembly and the outer stator assembly are arranged in the stator cavity, and the annular magnet assembly is arranged in the air gap between the inner stator assembly and the outer stator assembly; The sub-body is composed of two separate left and right movers, and the left and right movers are both cylindrical components with one end open and the other end provided with a bottom. The cross-sectional shape of the cylinder wall of the left and right movers is the same as the cross-sectional shape of the air gap and the clearance is matched. The cylinder wall of the open end of the left and right movers is provided with a plurality of axial grooves, so that the front part of the cylinder wall of the left and right movers is formed with a plurality of top claws, and the corresponding positions of the left end plate and the right end plate are provided with slots matching the clearance of the top claws The top claws of the left mover and the right mover are respectively inserted into the air gap from the slot holes of the left end plate and the right end plate, and press against the two end surfaces of the annular magnet assembly from both sides to form a linkage; a through hole is provided at the bottom center of the left mover and the right mover for the linkage shaft to pass through, and the linkage shaft passes through the shaft sleeve, the shaft hole in the center of the left end plate and the right end plate, and the through hole in the bottom center of the left mover and the right mover, and the linkage shaft and the shaft sleeve can be axially slidably arranged relative to each other, and the two ends of the linkage shaft are respectively connected to the left mover It is fixedly connected to the right mover to form an axial linkage; the left cylinder body and the right cylinder body are both cylindrical components with an open end and a bottom at the other end, and a left cylinder chamber and a right cylinder chamber are respectively provided inside. The left cylinder body and the right cylinder body are arranged at the left and right ends, and the open ends of the left cylinder body and the right cylinder body are respectively opposite to and fixedly connected to the left end plate and the right end plate, the left piston and the right piston are respectively arranged in the left cylinder chamber and the right cylinder chamber, and the two ends of the linkage shaft pass through the through hole and are respectively connected to the left piston rod and the right piston rod to form a linkage.

4. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 3 is characterized in that: The left cylinder body and the right cylinder body are both provided with a spring cavity, in which an elastic member is provided. The elastic member respectively enables the movable subassembly to have an elastic damping force opposite to the movement direction of the movable subassembly, so that the piston, the elastic member and the movable subassembly form an elastic system.

5. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 4 is characterized in that: The elastic member is a helical compression spring, and a stepped shaft-shaped cavity is provided in the left cylinder body and the right cylinder body. The cavity with a smaller diameter in the stepped shaft-shaped cavity constitutes the cylinder chamber, and the cavity with a larger diameter in the stepped shaft-shaped cavity constitutes the spring cavity. The diameter of the spring cavity is matched with the diameter clearance of the compression spring, the left mover and the right mover. One end of the compression spring elastically rests on the shoulder step of the cavity, and the other end elastically rests on the end face of the left mover or the right mover to form the elastic system.

6. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 5 is characterized in that: A groove is provided on the shoulder of the cavity to match the clearance of the end of the compression spring. One end of the compression spring is in the groove, and the other end elastically rests on the end surface of the left mover or the right mover to form the elastic system.

7. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to any one of claims 1 to 6, characterized in that: The magnet assembly comprises a bracket and a plurality of permanent magnets, and the plurality of permanent magnets are embedded in the bracket.

8. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 7 is characterized in that: The bracket is composed of an annular component with a thickness matching the air gap and a clearance matching. A number of rectangular notches are evenly spaced at the edge of the bracket, and arc-shaped grooves are arranged on both sides of the notches. The permanent magnet is in the shape and thickness matching the notches, and the curvature matches the diameter of the bracket. The cross-sections of the edges on both sides are arc-shaped, matching the arc-shaped grooves on both sides of the notches. The permanent magnet is inserted in the notch to form the annular magnet assembly.

9. A high-efficiency and energy-saving reciprocating permanent magnet linear compressor, characterized in that: It comprises a power mechanism and a compressor mechanism, wherein the power mechanism comprises a mover assembly and a stator assembly having an excitation coil and arranged in pairs, wherein the gap between the stator assemblies arranged in pairs forms an air gap; the mover assembly comprises a mover body and a magnet assembly, and the compressor mechanism comprises a cylinder body, a piston and a piston rod; The mover body is composed of two or more separately arranged parts, the magnet assembly is movably arranged in the air gap of the stator assembly arranged in pairs, the two or more separately arranged parts of the mover body are pressed against the magnet assembly from both sides along the moving direction of the mover body to form a linkage, the mover assembly is movably arranged, and the mover body is linked to the piston rod; The stator assembly arranged in pairs is composed of an inner stator assembly and an outer stator assembly, the inner stator assembly and the outer stator assembly are both annular as a whole, the outer diameter of the inner stator assembly is smaller than the inner diameter of the outer stator assembly, the inner stator assembly is sleeved in the center of the outer stator assembly, and the gap between the inner stator assembly and the outer stator assembly constitutes an annular air gap; the magnet assembly is annular to constitute an annular magnet assembly, and the two parts of the separately arranged mover body are against the two side end faces of the annular magnet assembly from both sides of the axial direction to form a linkage; The reciprocating permanent magnet linear compressor is provided with two groups of stator assemblies arranged in pairs, two groups of annular magnet assemblies, a linkage shaft, a base assembly and two groups of compressor mechanisms; the two groups of compressor mechanisms respectively include a left cylinder body, a left piston and a left piston rod and a right cylinder body, a right piston and a right piston rod; two stator cavities are fixedly provided on the base assembly, the two groups of stator assemblies arranged in pairs are respectively arranged in the two stator cavities, the linkage shaft is slidably arranged on the base assembly, the mover body is fixedly connected to the linkage shaft, and the two ends of the linkage shaft are respectively linked to the left piston rod and the right piston rod, forming a linkage connection between the mover body and the piston rod to form a reciprocating permanent magnet linear double-cylinder compressor; The base assembly includes a shaft sleeve, a left end plate, a left middle plate, a right middle plate, and a right end plate, the inner hole of which is matched with the linkage shaft; the mover body is composed of a left mover, a middle mover and a right mover which are separately arranged; the centers of the left end plate, the left middle plate, the right middle plate and the right end plate are provided with shaft holes for the linkage shaft to pass through, and the left end plate, the left middle plate, the right middle plate and the right end plate are respectively fixedly arranged on the shaft sleeve in sequence, and the annular space surrounded by the left end plate, the left middle plate and the shaft sleeve constitutes the left stator cavity, and the annular space surrounded by the right middle plate, the right end plate and the shaft sleeve constitutes the right stator cavity, the left stator cavity and the right stator cavity constitute the two stator cavities, and the two groups of stator assemblies arranged in pairs are respectively arranged on the left In the stator cavity and the right stator cavity, the two groups of annular magnet assemblies are respectively arranged in the air gaps of the two groups of stator assemblies, the left mover and the right mover are both cylindrical components with one end open and the other end provided with a bottom, the middle mover is a straight cylindrical component, the left mover, the middle mover and the right mover have the same diameter, and the cross-sectional shape of the cylinder wall is the same as the cross-sectional shape of the air gap and the clearance fits, a plurality of axial grooves are arranged on the cylinder walls at the open ends of the left mover and the right mover, so that a plurality of top claws are formed on the front parts of the cylinder walls of the left mover and the right mover, and a plurality of axial grooves are also arranged on the cylinder walls at both ends of the middle mover to form a plurality of top claws, the middle mover is arranged between the left middle plate and the right middle plate, and the left end plate, the left middle plate, and the right middle plate Slot holes matching the gaps of the top claws are provided at corresponding positions of the intermediate plate and the right end plate, and the top claws of the left mover, the middle mover and the right mover are respectively inserted into the air gaps from the slot holes of the left end plate, the left middle plate, the right middle plate and the right end plate, and respectively press against the two end surfaces of the two groups of annular magnet assemblies from both sides to form a linkage; a through hole for a linkage shaft to pass through is provided at the bottom center of the left mover and the right mover, and the linkage shaft passes through the shaft sleeve, the left end plate, the left middle plate, the right middle plate and the shaft hole in the center of the right end plate, the through hole in the center of the bottom of the left mover and the right mover, and the inner hole of the middle mover, and the linkage shaft and the shaft sleeve can be axially slidably arranged relative to each other, and the two ends of the linkage shaft are respectively fixedly connected to the left mover and the right mover to form an axial linkage;The left cylinder body and the right cylinder body are both cylindrical components with one end open and the other end provided with a bottom, and the left cylinder chamber and the right cylinder chamber are respectively provided inside. The open ends of the left cylinder body and the right cylinder body are respectively opposite to and fixedly connected with the left end plate and the right end plate, and the left piston and the right piston are respectively arranged in the left cylinder chamber and the right cylinder chamber, and the two ends of the linkage shaft pass through the through hole and are respectively connected with the left piston rod and the right piston rod to form a linkage. ; 10. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 9, characterized in that: The left cylinder body and the right cylinder body are both provided with a spring cavity, in which an elastic member is provided. The elastic member respectively enables the movable subassembly to have an elastic damping force opposite to the movement direction of the movable subassembly, so that the piston, the elastic member and the movable subassembly form an elastic system.

11. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 10, characterized in that: The elastic member is a helical compression spring, and a stepped shaft-shaped cavity is provided in the left cylinder body and the right cylinder body. The cavity with a smaller diameter in the stepped shaft-shaped cavity constitutes the cylinder chamber, and the cavity with a larger diameter in the stepped shaft-shaped cavity constitutes the spring cavity. The diameter of the spring cavity is matched with the diameter clearance of the compression spring, the left mover and the right mover. One end of the compression spring elastically rests on the shoulder step of the cavity, and the other end elastically rests on the end face of the left mover or the right mover to form the elastic system.

12. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 11, characterized in that: A groove is provided on the shoulder of the cavity to match the clearance of the end of the compression spring. One end of the compression spring is in the groove, and the other end elastically rests on the end surface of the left mover or the right mover to form the elastic system.

13. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to any one of claims 9 to 12, characterized in that: The magnet assembly comprises a bracket and a plurality of permanent magnets, and the plurality of permanent magnets are embedded in the bracket.

14. The high-efficiency and energy-saving reciprocating permanent magnet linear compressor according to claim 13, characterized in that: The bracket is composed of an annular component with a thickness matching the air gap and a clearance matching. A number of rectangular notches are evenly spaced at the edge of the bracket, and arc-shaped grooves are arranged on both sides of the notches. The permanent magnet is in the shape and thickness matching the notches, and the curvature matches the diameter of the bracket. The cross-sections of the edges on both sides are arc-shaped, matching the arc-shaped grooves on both sides of the notches. The permanent magnet is inserted in the notch to form the annular magnet assembly.

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