CN110566434B

CN110566434B - Linear compressor

Info

Publication number: CN110566434B
Application number: CN201910882463.8A
Authority: CN
Inventors: 陈洪月; 赵志群; 陈洪岩; 周加明; 张站立; 吴建令
Original assignee: Liaoning Technical University
Current assignee: Liaoning Technical University
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2021-02-26
Anticipated expiration: 2039-09-18
Also published as: CN110566434A

Abstract

The invention provides a linear compressor, which comprises a shell, wherein an outer yoke and a coil are clamped between a left end fixing block and a right end fixing block in the shell; the rotor component comprises a piston and a bearing permanent magnet bracket connected with the piston, a permanent magnet is embedded on the bearing permanent magnet bracket, and an air inlet silencing component is sleeved in the piston; the permanent magnet is positioned between the outer yoke and the inner yoke connected with the right end fixed block, and does gapless relative motion under the action of magnetic fields generated by the coil and alternately arranged in the positive and negative directions to drive the rotor component to do linear reciprocating oscillation motion. According to the invention, after high-speed airflow enters through the air inlet silencing assembly and the silencing exhaust structure, noise is reduced through the multistage embedded chamber; the outer side of the circumference of the piston is provided with an oil duct, so that lubrication between the piston and the cylinder is increased, heat generated by friction between the piston and the cylinder is reduced, the oil duct is arranged on the inner side and the outer side of the bearing permanent magnet rotor, the permanent magnet and the inner and outer magnet yokes can form close relative motion, and energy loss of a magnetic field is reduced.

Description

Linear compressor

Technical Field

The invention relates to the technical field of compressors, in particular to a linear compressor.

Background

A compressor is a driven fluid machine that raises low-pressure gas into high-pressure gas, and is a heart of a refrigeration system. At present, a small refrigerating device is usually provided with compact structure, light weight, oil-free lubrication and the like. The compressor is driven by a linear motor in a refrigerating system, wherein the shell is sealed, a core assembly is embedded in the shell and comprises a linear motor, a cylinder piston, a resonant assembly and an air suction and exhaust noise reduction assembly, in the assemblies, an exhaust valve plate forms a closed compressible cavity with the inner surface of a cylinder and an exhaust end head on the front end surface of the piston, the piston is a rotor which bears a permanent magnet and is driven to reciprocate by a magnetic field generated by the electrification of the linear motor, and the exhaust valve plate borne in front of the piston is continuously opened and closed, so that an air suction and exhaust process is formed, and in the air suction and exhaust process of the compressor, high-speed gas can impact a cavity and generate noise in a passing pipeline. In addition, friction is generated between the piston and the cylinder continuously to generate heat, if a gap between the rotor bearing the permanent magnet and the magnetic yoke is too large, energy loss is generated in a magnetic field, in the air inlet process, impurities enter the machine core of the compressor along with the rotor bearing the permanent magnet, the abrasion of the compressor is increased, the lubrication of the compressor is damaged, and the like, and finally the performance of the compressor is affected.

Disclosure of Invention

In view of the above technical problems, an object of the present invention is to provide a linear compressor, which has a reasonable structure, stable operation, less energy loss of a magnetic field, and good noise reduction and noise reduction effects.

In order to achieve the purpose, the invention provides a linear compressor, which comprises a casing, a left end fixing block, a right end fixing block and a rotor component, wherein the left end fixing block, the right end fixing block and the rotor component are positioned in the casing;

an outer yoke and a coil are clamped between the left end fixing block and the right end fixing block;

the rotor component comprises a piston positioned on the central axis of the casing and a bearing permanent magnet bracket connected with the piston, a permanent magnet is embedded on the bearing permanent magnet bracket, and an air inlet silencing component is sleeved in the piston;

the permanent magnet is positioned between the outer yoke and the inner yoke connected with the right end fixed block, and does gapless relative motion under the action of magnetic fields generated by the coil and alternately arranged in the positive and negative directions to drive the rotor component to do linear reciprocating oscillation motion.

Furthermore, one side of the bearing permanent magnet support, which is close to the air cylinder matched with the piston, is fixedly connected with a first resonant spring, one end of the first resonant spring is fixed on the air cylinder, the other end of the first resonant spring is fixed on a first resonant spring right end support, and the first resonant spring right end support is connected with the bearing permanent magnet support through a bolt;

one side that the amortization subassembly of admitting air was kept away from the cylinder is connected with second resonance spring, second resonance spring connects between second resonance spring flange support and second resonance spring right-hand member support, second resonance spring flange support pass through the bolt and admit air amortization subassembly leg joint, second resonance spring right-hand member support passes through bolted connection between interior yoke support and damping spring support.

Optionally, the intake silencing assembly is a multi-stage chamber and includes a first intake silencing embedded assembly, a second intake silencing embedded assembly, a third intake silencing embedded assembly and a fourth intake silencing embedded assembly which are coaxially assembled, and the second intake silencing embedded assembly, the third intake silencing embedded assembly and the fourth intake silencing embedded assembly are respectively and tightly embedded into the first intake silencing embedded assembly; the top of the piston is provided with an exhaust hole which is communicated with the inside of the cylinder.

Further, a cylinder is connected to the outer periphery of the piston in a sealing and sliding manner, the outer periphery of the cylinder is fixedly connected to the left end fixing block through a bolt, and one end, far away from the piston, of the cylinder is communicated with a silencing and exhausting structure.

Preferably, the silencing exhaust structure is internally provided with a first silencing cavity, a second silencing cavity and a third silencing cavity, the first silencing cavity is connected with the second silencing cavity through threads, and the third silencing cavity is tightly matched with the first silencing cavity and the second silencing cavity and is tightly pressed by an exhaust silencing cover plate to be connected with the cylinder.

Preferably, the air inlet of the compressor is connected with a first layer of filter screen, and the air inlet port of the air inlet silencing assembly is connected with a second layer of filter screen;

the first layer of filter screen is locked between the right end support of the second resonant spring and the damping spring support; and the second layer of filter screen is locked between the second resonant spring flange bracket and the air inlet silencing assembly.

Furthermore, an oil channel is arranged outside the circumference of the piston and used for reducing friction between the piston and the cylinder and heat generated by an electromagnetic system to the piston;

and the inner surface and the outer surface of the bearing permanent magnet bracket, which are respectively contacted with the inner yoke and the outer yoke, are respectively provided with an oil duct for lubricating the permanent magnet and the inner yoke and the outer yoke through the oil ducts to form seamless friction.

Preferably, the inner yoke is connected with the right end fixing block through an inner yoke support, and a first sealing ring is connected between the inner yoke support and the right end fixing block;

a second sealing ring is connected between the air cylinder and the left end fixing block;

and a third sealing ring is connected between the cylinder and the silencing exhaust structure.

Optionally, a front end cover of the silencing exhaust structure, which is close to the cylinder, is connected with a spring for preventing the piston from colliding with the cylinder, so that damage to the piston caused by collision of the piston with the cylinder due to too large stroke of the piston can be effectively avoided.

Furthermore, the shell is in a stepped cylindrical shape, and the interior of the shell is connected with the left end fixing block through a rubber fixing block; the air inlet end part of the compressor is provided with a damping spring.

Therefore, the linear compressor can prevent air dust from entering the compressor to increase the abrasion of the compressor and influence the performance of the compressor by arranging two filter screens, the cleanliness of discharged gas is higher, after high-speed airflow enters the linear compressor, the noise is reduced by the four-stage embedded cavity, the rear end of the front end cover of the noise reduction and exhaust structure is provided with a spring to prevent the piston from colliding with the cylinder to damage the piston due to overlarge stroke, the outer side of the circumference of the piston is provided with an oil duct to increase the lubrication between the piston and the cylinder and reduce the heat generated by the friction between the piston and the cylinder, and the inner side and the outer side of the bearing permanent magnet rotor are provided with the oil ducts to enable the permanent magnet and the inner magnet yoke to form.

Drawings

Fig. 1 is a schematic view of an internal structure of a linear compressor of the present invention;

FIG. 2 is a schematic structural view of a discharge valve plate of a piston of the linear compressor according to the present invention;

fig. 3 is a schematic structural view of a piston of a linear compressor of the present invention, in which (a) is one state and (b) is the other state;

fig. 4 is a schematic structural view of a muffling and exhausting structure of a linear compressor of the present invention, wherein (a) is a schematic view of a cylinder spring and a second muffling chamber 101 for preventing a piston from hitting, (b) is a schematic view of the second muffling chamber, (c) is a schematic view of a first muffling chamber and a third muffling chamber of the muffling and exhausting structure, and (d) is a schematic view of an exhaust muffling cover plate of the muffling and exhausting structure;

fig. 5 is a schematic structural view of a front end cover of a muffling and exhausting structure of a linear compressor according to the present invention;

fig. 6 is a schematic structural view of a cylinder of the linear compressor of the present invention;

fig. 7 is a schematic structural view of a first resonant spring of the linear compressor of the present invention;

fig. 8 is a structural view illustrating a right end bracket of a first resonant spring of the linear compressor of the present invention;

fig. 9 is a schematic end view of a cylinder of the linear compressor of the present invention;

fig. 10 is a schematic structural view of a second resonant spring flange bracket of the linear compressor of the present invention;

fig. 11 is a schematic structural view of a second resonant spring of the linear compressor of the present invention;

fig. 12 is a structural view illustrating a right end bracket of a second resonant spring of the linear compressor of the present invention;

fig. 13 is a schematic structural view of a damper spring bracket of a linear compressor according to the present invention;

fig. 14 is a schematic structural view of an intake silencer assembly supporter of a linear compressor according to the present invention, in which (a) is in one state and (b) is in another state;

fig. 15 is a schematic structural view of a second layer filter screen of the linear compressor of the present invention;

fig. 16 is a schematic view showing a first filter net of the linear compressor of the present invention;

fig. 17 is a structural view illustrating an inner yoke bracket of a linear compressor according to the present invention;

fig. 18 is a schematic structural view of a first seal ring of the linear compressor of the present invention;

fig. 19 is a schematic structural view of an outer compressor end cap of the linear compressor of the present invention;

fig. 20 is a schematic structural view of a carrier permanent magnet frame of a linear compressor of the present invention, in which (a) is one state and (b) is the other state;

fig. 21 is a schematic structural view of an intake silencer assembly of a linear compressor according to the present invention, wherein (a) is a schematic view of an intake silencer fourth embedded assembly, (b) is a schematic view of an intake silencer third embedded assembly, (c) is a schematic view of an intake silencer second embedded assembly, and (d) is a schematic view of an intake silencer first embedded assembly;

fig. 22 is a schematic structural view of an outer yoke of the linear compressor of the present invention;

fig. 23 is a schematic view showing a structure of a coil of the linear compressor of the present invention;

fig. 24 is a schematic structural view of a left end fixing block of the linear compressor of the present invention, in which (a) is one state and (b) is the other state;

fig. 25 is a schematic structural view of a right end fixing block of the linear compressor of the present invention, in which (a) is one state and (b) is the other state;

fig. 26 is an exploded view showing the overall structure of the linear compressor of the present invention.

Wherein, 1, an air inlet; 2. a first layer of filter screen; 3. a second layer of filter screen gas; 4. a fourth inlet silencing assembly; 5. a third embedded component for air intake and noise reduction; 6. a second embedded component for air intake and noise reduction; 7. a first inlet silencing embedded component; 8. a cylinder; 9. an exhaust valve plate; 10. a gas compression chamber; 11. a front end cover; 12. a silencing exhaust structure; 13. preventing the piston from hitting the cylinder spring; 14. a piston; 15. a piston outer oil gallery; 16. a first resonant spring; 17. a second seal ring; 18. a left end fixing block; 19. an external oil passage for bearing the permanent magnet support; 20. an outer yoke; 21. a permanent magnet; 22. a coil; 23. an inner yoke; 24. a right end fixing block; 25. a first seal ring; 26. a second resonant spring; 27. a compressor damping spring; 28. an inner yoke bracket; 29. a second resonant spring flange mount; 30-a, fixing a connecting piece by using rubber at the upper end of the compressor; 30-b, a rubber fixing connecting piece at the lower end of the compressor; 31. a housing; 32. a load bearing permanent magnet support; 33. an air outlet; 34. a housing air inlet; 35. an internal oil passage of the bearing permanent magnet bracket; 36. a first resonant spring right end bracket; 37. a second resonant spring right end bracket; 38. a damping spring support; 39. an intake silencer assembly support; 40. an outer end cover of the compressor; 41. a third seal ring; 102. a first muffling chamber; 101. a second muffling chamber; 103. a third sound-deadening chamber; 104. an exhaust silencing cover plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived from the embodiments of the present invention by a person skilled in the art without any creative effort, should be included in the protection scope of the present invention.

It should be noted that all the directional indicators (such as outer, inner, left and right … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly. Where "left" corresponds to the left side in fig. 1 and "right" corresponds to the right side in fig. 1.

Referring to fig. 1 to 26, the linear compressor of the present invention is described in detail, a casing 31 of the linear compressor of the present invention is in a stepped cylindrical shape, a frame of the linear compressor is fixed inside the casing 31, a second seal ring 17 is clamped between a cylinder 8 and a left end fixing block 18 and locked together by screws, a piston 14 is arranged inside the cylinder 8, a third seal ring 41 is placed between the cylinder 8 and a silencing exhaust structure 12 and locked together by bolts, a first seal ring 25 is clamped between a right end fixing block 24 and an inner yoke bracket 28 and locked together by screws, the whole machine is in a sealed state, and only one central hole in the direction of a flange connected with the right end fixing block 24 can be used for air intake.

The linear compressor of the invention is provided with the oil channel at the outer side of the circumference of the piston, oil lubrication is carried out between the cylinder 8 and the piston 14, and the frictional heat generation between the piston 14 and the cylinder 8 is reduced. The permanent magnet bearing bracket 32 is provided with oil ducts (permanent magnet bearing bracket external oil ducts 19, 1901) on both the inner and outer sides (as shown in fig. 20), the external oil ducts are distributed on both sides of the permanent magnet, and each circle of the external oil ducts is a semicircular oil duct, so that the permanent magnet 21 and the outer yoke 20 do not move in a gapless manner. The inner side of the permanent magnet bearing bracket 32 is still provided with a semicircular oil passage (the oil passage 35 inside the permanent magnet bearing bracket) which is two circles, so that the permanent magnet 21 and the inner yoke 23 form seamless relative motion, and therefore, the permanent magnet 21 and the inner yoke and the outer yoke move closely and relatively, and the energy loss of a magnetic field is reduced.

The part that interior yoke support 28 and right-hand member fixed block 24 are connected sets up first layer filter screen 2, places second layer filter screen 3 between second resonance spring flange support 29 and air

intake amortization subassembly

4, 5, 6, 7, avoids impurity to get into the core, sets up twice filter screen, avoids impurity to get into the friction that increases the compressor in the compressor core, influences the performance of compressor, ensures the high cleanliness factor of compressor combustion gas.

Referring to fig. 1, rubber fixing connectors 30-a and 30-b are provided at the upper and lower parts in a casing 31 of the linear compressor, and a damping spring 27 is further provided at the end of an air inlet to effectively damp the linear compressor. A through hole is arranged on the central axis of the right end fixing block 24 and communicated with the air inlet 1. The left end fixing block 18 and the right end fixing block 24 are fastened through bolts, an outer yoke 20 and a coil 22 are clamped between the left end fixing block and the right end fixing block, the coil 22 is electrically connected with alternating current, and the permanent magnet 21, an inner yoke 23 and the outer yoke 20 do not move in a gapless relative mode. The coil 22 generates a magnetic field with alternating positive and negative directions, so that the permanent magnet 21 drives the rotor component to do linear reciprocating oscillating motion under the action of the magnetic field.

As shown in fig. 2 and 3, the discharge valve plate 9 of the compressor is matched with the piston 14, the outer side of the circumference of the piston is provided with two circles of semicircular oil passages for lubricating action between the piston and the cylinder 8, the piston 14 and the boss 1409 thereof are cast parts and are locked in the threaded

holes

1401, 1402 of the piston through the

holes

901, 902 on the discharge valve plate 9 by

bolts

903, 904, the

fan blades

905, 906, 907, 908, 909 of the discharge valve plate 9 cover the

holes

1404, 1405, 1406, 1407, 1408 of the piston, when the inlet air pressure reaches a certain pressure, the discharge valve plate 9 is opened and enters the compression chamber 10 of the compressor through the

holes

1404, 1405, 1406, 1407, 1408, at this time, the piston performs compression movement in the cylinder 8, the discharge valve plate 9 is closed, and the discharge operation of the compressor is performed.

As shown in fig. 22 and 23, the outer yoke 20 is clamped between the

bumps

2201 and 2202, the

bumps

2202 and 2203, the

bumps

2203 and 2204, and the

bumps

2204 and 2201 of the coil housing on one side, and is symmetrically matched with the bumps to clamp the coil bracket on the other side, and is matched with the screw holes 1806, 1807, 1808, 1809, 1810, 1811 (as shown in fig. 24) on the left end fixing block 18 through the

holes

2407, 2408, 2409, 2410, 2411, 2412 on the right end fixing block 24 and the screw holes 2407, 2408, 1809, 1810, 1811 (as shown in fig. 24) by the

bolts

2401, 2402, 2403, 2404, 2405, 2406 (as shown in fig.

One side of the bearing permanent magnet bracket 32 close to the cylinder 8 is fixedly connected with first

resonant springs

16, 1601, 1602 and 1603, and one side of the

intake silencing assemblies

4, 5, 6 and 7 far away from the cylinder 8 is connected with a second resonant spring 26 for assisting the linear reciprocating oscillating motion of the rotor component. As shown in fig. 7, one end of the first

resonant spring

16, 1601, 1602, 1603 of the linear compressor is placed in the

cylinder

3601, 3602, 3603, 3604 of the first resonant spring right end bracket 36 (fig. 8), and the first resonant spring right end bracket 36 is locked together by

bolts

3609, 3610, 3611, 3612 through

holes

3205, 3606, 3607, 3608 of the

holes

3605, 3606, 3207, 3208 carrying the permanent magnet bracket 32 (fig. 20) and the threaded

holes

3908, 3909, 3910, 3911 of the intake silencer assembly bracket 39 (fig. 14). As shown in fig. 11, one end of the second resonant spring 26 of the linear compressor is placed on the second resonant spring flange support 29 (as shown in fig. 10) pressing the second filter screen 3 (as shown in fig. 15), and the other end is fixed on the second resonant spring right end support 37 (as shown in fig. 12), and the second resonant spring 26 is pressed by the second resonant spring flange support 29 and the second resonant spring right end support 37. The natural frequency of the first

resonant spring

16, 1601, 1602, 1603 and the second resonant spring 26 coincides with the resonant frequency at which the piston operates, and the stiffness of the first resonant spring (4) coincides with that of the second resonant spring 26 (1). The lengths of the

first resonance spring

16, 1601, 1602, 1603 and the second resonance spring 26 are kept consistent under the condition that the linear motor is not driven.

The second resonant spring flange mount 29 (fig. 10) locks the second layer of filter mesh 3 (fig. 15) in the threaded

holes

3902, 3903, 3904, 3905, 3906 (fig. 14) on the intake silencer assembly mount 39 by

bolts

2901, 2902, 2903, 2904, 2905, 2906 through the

holes

2907, 2908, 2909, 2910, 2911, 2912 and the

holes

301, 302, 303, 304, 305, 306 (fig. 15) on the second layer of filter mesh 3. The boss 401 of the intake silencer assembly (see fig. 21) mates with the recess 3901 of the intake silencer assembly mount 39. The first filter stage 2 (fig. 16) is locked by bolts (fig. 13)3802, 3803, 3804, 3805 through

holes

4001, 4002, 4003, 4004 (fig. 19) in the compressor outer end cover 40,

holes

3806, 3807, 3808, 3809 (fig. 13) in the damper spring bracket 38, holes 201, 202, 203, 204 in the first filter stage 2, holes 2802, 2803, 2804, 2805 (fig. 17) in the inner yoke bracket 28, and holes 2501, 2502, 2503, 2504 (fig. 18) in the first seal ring 2 into threaded

holes

3, 2414, 2415, 2416 (fig. 25) in the right end mounting block 24.

The air

inlet silencing components

4, 5, 6 and 7 are sleeved in the piston 14, the air

inlet silencing components

4, 5, 6 and 7 are multi-stage chambers, each chamber is provided with a plurality of vent holes, the vent holes are communicated with the piston 14, the top of the piston 14 is provided with an exhaust hole, an exhaust valve is arranged in the exhaust hole, the exhaust valve is opened in one direction and closed in the opposite direction, and the exhaust hole is communicated with the inside of the air cylinder 8. The air

inlet silencing components

4, 5, 6 and 7 comprise an air inlet silencing first embedded component 7, an air inlet silencing second embedded component 6, an air inlet silencing third embedded component 5 and an air inlet silencing fourth embedded component 4 which are tightly connected with the bearing permanent magnet bracket 32 through bolts and an air inlet silencing component bracket 39.

As shown in fig. 21, the boss 601 in the second inlet silencer assembly 6 is matched with the annular groove 706 in the first inlet silencer assembly 7, the boss 501 in the third inlet silencer assembly 5 is matched with the boss 601 in the second inlet silencer assembly 6, and finally the boss 403 in the fourth inlet silencer assembly 4 tightly presses the third inlet silencer assembly 5 and the second inlet silencer assembly 6 into the first inlet silencer assembly 7, and finally the third inlet silencer assembly 5 and the second inlet silencer assembly 6 are matched with the threaded holes 3902, 3903, 3904, 3905, 3906, 3907 in the silencer and inlet assembly bracket 39 through the bolts 2901, 2902, 2903, 2904, 2905, 2906, 2902, 2906, and the holes 301, 302, 303, 304, 305, 306 on the second inlet silencer assembly 3 and the first inlet silencer assembly 7 are pressed through the holes 2907, 2908, 2909, 2910, 2911, 2912 (as shown in fig. 10) and the holes 301, 302, 303, 304, 305, 306 on the second filter net 3, the first embedded component 7 for air intake and noise reduction, the second embedded component 6 for air intake and noise reduction, the third embedded component 5 for air intake and noise reduction and the fourth embedded component 4 for air intake and noise reduction are all coaxially assembled. In the air intake silencing process, firstly, air enters from a first silencing cavity of the air intake silencing fourth embedded component 4, enters into a second silencing cavity 503 of the air intake silencing third embedded component 5 through a hole 502 of the air intake silencing third embedded component 5, exits from

holes

504, 505, 506, 507, 508, 509, 5010 and 5011 of the second silencing cavity, enters into a third silencing cavity of the air intake silencing second embedded component 6, enters through a central hole 602, exits from

holes

602, 603, 604, 605, 606, 607, 608, 609 and 6010 of the third silencing cavity, enters into a fourth silencing cavity of the air intake silencing first embedded component 7, and finally exits from

holes

702, 703 and 704 of the fourth silencing cavity, and the air pushes open an exhaust valve plate 9 (shown in figure 2) and enters into a compression cavity 10.

The periphery of a piston 14 is hermetically and slidably connected with a cylinder 8, the periphery of the cylinder 8 is fixedly connected to a left end fixing block 18 through a bolt, and one end of the cylinder 8, which is far away from the piston 14, is communicated with a silencing exhaust structure 12. When the piston 14 is compressed in the compression chamber 10 of the cylinder and has a rigidity larger than that of the cylinder

collision preventing springs

13, 1301, 1302 and 1303 behind the exhaust front end cover 11, the gas enters the silencing exhaust structure 12. Third sealing washer 41 is accompany in amortization exhaust structure 12 and the cylinder 8 centre, be in the same place through bolt-up connection, be equipped with first amortization chamber 102 in the amortization exhaust structure 12, second amortization chamber 101 and third amortization chamber 103, first amortization chamber 102 passes through threaded connection with second amortization chamber 101 and is in the same place, third amortization chamber 103 closely cooperates with first amortization chamber 102 and second amortization chamber 101, compress tightly through exhaust amortization apron 104 at last and pass through bolted connection with cylinder 8 together, the air current gets into the amortization chamber after, through the natural frequency that makes the amortization chamber and the frequency that needs to offset reduce because of resonance, play the effect of noise reduction.

As shown in FIG. 4, one end of 4 piston crashing-proof springs 13, 1301, 1302, 1303 of the compressor is firstly installed in four

cylindrical barrels

10202, 10203, 10204, 10205 of a first sound-deadening chamber 102, the other end of the 4 springs 13, 1301, 1302, 1303 is placed in four

cylindrical barrels

1101, 1102, 1103, 1104 on a front end cover 11 of the sound-deadening and exhausting structure, a second sound-deadening chamber 101 is screwed on a threaded hole 10206 of the first sound-deadening chamber 102 of the exhaust sound-deadening through a thread 10102, the rear part of the second sound-deadening chamber 102 is tightly matched with the front part of a third sound-deadening chamber 103, finally, a gas-deadening cover plate 104 of the compressor is locked on threaded

holes

805, 806, 807, 808 of a cylinder 8 through

holes

01, 10402, 10403, 10404 through a

bolt

10405, 10406, 10407, 10408, a sealing ring 41 is clamped between the exhaust sound-deadening cover plate 104 and the cylinder 8, and a sealing ring 41 is clamped between the compression chamber 10 and the main exhaust, 1301. 1302, 1303 rigidity, the front cover 11 of the silencing and exhausting structure is opened, the gas enters the first silencing chamber 102, then enters the second silencing chamber through the

holes

10103, 10104, 10105, 10106, 10107, 10108, 10109, 10110 of the second silencing chamber 101, enters the tube 10305 of the third silencing chamber 103 through the central hole 10201 of the first silencing chamber, enters the tube 10305 of the third silencing chamber 103 through the

peripheral holes

10306, 10307, 10308, 10309, then enters the exhaust silencing cover plate 104 through the

holes

10301, 10302, 10303, 10304, and finally is exhausted through the exhaust hole 10409.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Firstly, after the coil 22 is powered on, the coil 22 generates a magnetic field with alternating positive and negative directions, the permanent magnet 21 drives the rotor component to do linear reciprocating oscillating motion under the action of the magnetic field with alternating positive and negative directions, meanwhile, the first resonant spring 16 and the second resonant spring 26 assist the rotor component to do linear reciprocating oscillating motion, high-speed gas enters the compressor, gas enters the compressor from the gas inlet 1, enters the compressor through the first layer of filter screen 2, enters the gas

inlet silencing components

4, 5, 6 and 7 through the second layer of filter screen 3 to be silenced, enters the compression cavity 10 through opening the exhaust valve plate 9 of the piston, along with the forward compression of the piston, the pressure in the cylinder increases, when the pressure in the cylinder is greater than the rigidity of the piston collision prevention cylinder spring 13 in the silencing exhaust structure 12, the front end cover 11 is opened, the gas enters the silencing exhaust structure 12, the natural frequency of the silencing cavity in the silencing exhaust structure and the frequency to be counteracted are resonated to reduce the noise.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The linear compressor is characterized by comprising a casing (31), a left end fixing block (18) positioned in the casing (31), a right end fixing block (24) and a rotor component;

an outer yoke (20) and a coil (22) are clamped between the left end fixing block (18) and the right end fixing block (24);

the rotor component comprises a piston (14) positioned on the central axis of the casing (31) and a bearing permanent magnet bracket (32) connected with the piston (14), a permanent magnet (21) is embedded on the bearing permanent magnet bracket, and an air inlet silencing component (4, 5, 6, 7) is sleeved in the piston (14);

the permanent magnet (21) is positioned between the outer yoke (20) and an inner yoke (23) connected with the right end fixing block (24), and does gapless relative motion under the action of magnetic fields which are generated by a coil (22) and alternate in positive and negative directions to drive the rotor component to do linear reciprocating oscillating motion;

one side, close to the cylinder (8) matched with the piston (14), of the bearing permanent magnet support (32) is fixedly connected with a first resonant spring (16, 1601, 1602, 1603), one end of the first resonant spring (16, 1601, 1602, 1603) is fixed on the cylinder (8), the other end of the first resonant spring is fixed on a first resonant spring right end support (36), and the first resonant spring right end support (36) is connected with the bearing permanent magnet support (32) through a bolt;

one side, far away from the cylinder (8), of the air inlet silencing assembly (4, 5, 6, 7) is connected with a second resonant spring (26), the second resonant spring (26) is connected between a second resonant spring flange support (29) and a second resonant spring right end support (37), the second resonant spring flange support (29) is connected with an air inlet silencing assembly support (39) through bolts, and the second resonant spring right end support (37) is connected between an inner yoke support (28) and a damping spring support (38) through bolts;

the air inlet silencing assembly (4, 5, 6, 7) is a multi-stage chamber and comprises an air inlet silencing first embedded assembly (4), an air inlet silencing second embedded assembly (5), an air inlet silencing third embedded assembly (6) and an air inlet silencing fourth embedded assembly (7) which are coaxially assembled, and the air inlet silencing second embedded assembly (5), the air inlet silencing third embedded assembly (6) and the air inlet silencing fourth embedded assembly (7) are respectively and tightly embedded into the air inlet silencing first embedded assembly (4); the top of the piston (14) is provided with an exhaust hole which is communicated with the inside of the cylinder (8).

2. The linear compressor according to claim 1, characterized in that a cylinder (8) is connected with the outer periphery of the piston (14) in a sealing and sliding manner, the outer periphery of the cylinder (8) is fixedly connected to the left end fixing block (18) through a bolt, and one end of the cylinder (8) far away from the piston (14) is communicated with a noise reduction and exhaust structure (12).

3. The linear compressor of claim 2, wherein a first silencing chamber (102), a second silencing chamber (101) and a third silencing chamber (103) are arranged in the silencing exhaust structure (12), the first silencing chamber (102) is connected with the second silencing chamber (101) through threads, and the third silencing chamber (103) is tightly matched with the first silencing chamber (102) and the second silencing chamber (101) and is tightly pressed by an exhaust silencing cover plate (104) to be connected with the cylinder (8).

4. The linear compressor according to claim 1, characterized in that the air inlet (1) of the compressor is connected with a first layer of filter screen (2), and the air inlet port of the air inlet silencing assembly (4, 5, 6, 7) is connected with a second layer of filter screen (3);

the first layer of filter screen (2) is locked between the second resonant spring right end support (37) and the damping spring support (38); the second layer of filter screen (3) is locked between the second resonance spring flange bracket (29) and the air inlet silencing component (4, 5, 6, 7).

5. Linear compressor according to claim 1, characterized in that the piston (14) is provided with oil channels on the outside of its circumference for reducing the friction between the piston (14) and the cylinder (8) and the heat generated by the electromagnetic system on the piston (14);

the bearing permanent magnet support (32) is respectively provided with oil ducts on the inner surface and the outer surface which are contacted with the inner yoke (23) and the outer yoke (20) and used for enabling the permanent magnet (21) and the inner and outer yokes to form seamless friction through the lubrication of the oil ducts.

6. The linear compressor of claim 2, wherein the inner yoke (23) is connected with the right end fixing block (24) through an inner yoke bracket (28), and a first sealing ring (25) is connected between the inner yoke bracket (28) and the right end fixing block (24);

a second sealing ring (17) is connected between the cylinder (8) and the left end fixing block (18);

and a third sealing ring (41) is connected between the cylinder (8) and the silencing exhaust structure (12).

7. Linear compressor according to claim 2, characterized in that a piston knock-preventing spring (13, 1301, 1302, 1303) is connected to the sound-deadening exhaust structure (12) near the front end cover (11) of the cylinder (8).

8. The linear compressor of claim 1, wherein the casing (31) has a stepped cylindrical shape, and the inside thereof is connected to the left end fixing block (18) by rubber fixing blocks (30-a, 30-b); the air inlet end part of the compressor is provided with a damping spring (27).