CN102889192B - Linear compressor driven by moving magnet type linear oscillation motor - Google Patents
Linear compressor driven by moving magnet type linear oscillation motor Download PDFInfo
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- CN102889192B CN102889192B CN201110202468.5A CN201110202468A CN102889192B CN 102889192 B CN102889192 B CN 102889192B CN 201110202468 A CN201110202468 A CN 201110202468A CN 102889192 B CN102889192 B CN 102889192B
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- 230000010355 oscillation Effects 0.000 title claims description 13
- 239000004020 conductor Substances 0.000 claims abstract description 44
- 230000005284 excitation Effects 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 238000009434 installation Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The invention relates to the technical field of linear compressors, and discloses a linear compressor driven by a moving magnet type linear oscillating motor, which comprises a moving magnet type linear oscillating motor, a cylinder, a piston, an air suction and exhaust device and a resonance component, wherein the cylinder is arranged on the moving magnet type linear oscillating motor; the moving magnet type linear oscillating motor comprises a stator component, a rotor component, a first fixed connecting piece, a second fixed connecting piece and a third fixed connecting piece; the piston is arranged on the rotor component; the air suction and exhaust device is arranged at the end part of the cylinder; the resonance part is arranged between the rotor part and the third fixed connecting piece; the stator component comprises a first magnetic conductor and two second magnetic conductors, wherein the center pillar is wound with an excitation coil, the first magnetic conductor is positioned in the middle, and the two second magnetic conductors are positioned on two sides of the first magnetic conductor; two symmetrical air gaps are formed between the first magnetic conductor and the second magnetic conductors on two sides; the rotor part comprises two groups of sheet type permanent magnets which are respectively and symmetrically arranged in the two air gaps. The invention can improve the utilization rate of coil materials and is suitable for application in short spaces.
Description
Technical Field
The invention relates to a linear compressor, in particular to a linear compressor driven by a moving-magnet linear oscillating motor.
Background
The linear compressor is driven by a linear oscillating motor, a conversion device between rotary driving and reciprocating compression is omitted, the efficiency of the compressor is greatly improved, and the linear compressor also has the advantages of compact structure, light weight, no oil or less lubricating oil, excellent capacity-variable characteristic and the like. Therefore, linear compressors are widely used from air compressors, vacuum pumps, to small refrigeration devices such as refrigerators and freezers, and are a major development direction of efficient compressors for small refrigeration devices.
The linear oscillation motor comprises a moving magnet type linear oscillation motor and a moving coil type linear oscillation motor. The moving-magnet linear oscillating motor is a linear oscillating motor taking a permanent magnet material as a rotor, a constant magnetic field generated by the permanent magnet material and an alternating magnetic field generated by an excitation coil interact to push the permanent magnet material to do reciprocating alternate motion, and compared with a moving-coil linear oscillating motor taking the excitation coil as the rotor, the moving-magnet linear oscillating motor has the advantages that the rotor is smaller in mass, larger in thrust and higher in efficiency. With the development of novel permanent magnet materials, the advantages of the moving magnet type linear oscillation motor are more and more obvious.
Beale and Redlich et al in 1992, the us developed a moving magnet type linear oscillating motor of Redlich type construction, and the company Sunpower, at the end of the 90 s, developed a refrigerant compressor using a cylindrical Redlich linear oscillating motor. In 2003, the LGE company improved on the basis of the structure, and the commercialization of the linear compressor was achieved for the first time. The cylindrical moving magnet linear oscillation motor is characterized in that a magnetic conductive material is arranged on the circumference of an excitation coil to form a magnetic circuit structure of a cylindrical air gap concentric with the excitation coil, and a radially magnetized cylindrical permanent magnet reciprocates in the air gap. The magnetic conductive material consists of a cylindrical inner stator and a cylindrical outer stator, and the cylinder and the piston part are arranged in the cylinder of the inner stator.
Inville et al, New Zealand, 2000 proposed an oil-free linear compressor employing gas bearings, in which a moving-magnet linear oscillating motor employed in the linear compressor of this construction was formed with two sets of laminations stacked and symmetrically placed stators to form an air gap, and permanent magnets moved in the air gap between the two sets of stators. In 2010, the Brazilian Enbraco announced that the application development of the linear compressor with the structure on the refrigerator was completed. The leafy Yue of university of Zhejiang 2006 proposes a double-stator linear oscillating motor, and a stator of the double-stator linear oscillating motor is formed by overlapping annular stamped sheets. Compared with a cylindrical structure, the motor structure with the directly stacked punching sheets can reduce the processing and assembling difficulty.
The existing linear compressor adopting the cylindrical Redlich structure moving magnet type linear oscillating motor as a driver has the appearance characteristics that the design of a magnetic circuit structure is better, the loss of a magnetic circuit is small, the major axis is smaller, the deviation is short and high, and the assembly difficulty of the radiation distribution of an inner stator and an outer stator on the circumference is also higher. And the motor structure has small processing and assembling difficulty, but the magnetic path loss is relatively large.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is how to improve the utilization rate of coil materials; and how to adapt the compressor to low space applications.
(II) technical scheme
In order to solve the technical problem, the invention provides a linear compressor driven by a moving magnet type linear oscillating motor, which comprises the moving magnet type linear oscillating motor, a cylinder, a piston, an air suction and exhaust device and a resonance component, wherein the cylinder is arranged on the moving magnet type linear oscillating motor; wherein,
the moving magnet type linear oscillation motor comprises a stator component, a rotor component, a first fixed connecting piece, a second fixed connecting piece and a third fixed connecting piece; the piston is arranged on the rotor component; the air suction and exhaust device is arranged at the end part of the cylinder; the resonance part is arranged between the rotor part and the third fixed connecting piece;
the stator component comprises a first magnetic conductor and two second magnetic conductors, wherein the center pillar is wound with an excitation coil, the first magnetic conductor is located in the middle, and the two second magnetic conductors are located on two sides of the first magnetic conductor; two symmetrical air gaps are formed between the first magnetic conductor and the second magnetic conductors on two sides;
the rotor part comprises two groups of sheet type permanent magnets which are respectively and symmetrically arranged in the two air gaps.
Preferably, the mover member further includes a coupling member on which the sheet type permanent magnet is mounted.
Preferably, the first fixed connecting piece is a plate-shaped connecting piece provided with a mounting hole; the second fixed connecting piece is a plate-shaped connecting piece provided with an assembling hole and a strip seam; the third fixed connecting piece is a connecting piece provided with an assembling hole; the first fixed connecting piece and the second fixed connecting piece are assembled at two sides of the first magnetic conductor and the second magnetic conductor and fixedly connected through the first assembling hole group; the third fixed connecting piece and the second fixed connecting piece are fixedly assembled through a second assembling hole group; and the two groups of sheet permanent magnets are respectively inserted into the two air gaps of the stator component through the strip slots on the second fixed connecting piece.
Preferably, the piston is installed in the cylinder, and the piston and the cylinder are matched to realize the positioning of the sheet type permanent magnet in the air gap and the axial positioning of the rotor component.
Preferably, the resonance part is installed between the third fixed connection and the connection part, and between the second fixed connection and the connection part.
Preferably, the cylinder is arranged on the third fixed connecting piece, and the installation direction of the cylinder is the same as that of the piston.
Preferably, the two groups of sheet-type permanent magnets are parallel to each other, the two parallel groups of sheet-type permanent magnets are respectively assembled at two ends of one side of the connecting part, the other side of the connecting part is connected with the piston, and the piston is inserted into the cylinder.
Preferably, the air suction and exhaust device is arranged at the end of the cylinder and comprises an exhaust cavity, an air suction cavity, an exhaust valve and an air suction valve, the exhaust cavity and the air suction cavity are two independent cavities, and the air suction valve and the exhaust valve are arranged at the end of the cylinder in the same direction or at the end of a piston opposite to the exhaust valve.
Preferably, the cylinder is arranged on the second fixed connecting piece, and the installation direction is opposite to that of the piston.
Preferably, it is two sets of the piece formula permanent magnet is parallel to each other, and two sets of parallel piece formula permanent magnet assemblies are in adapting unit one side, one side that adapting unit was equipped with the piece formula permanent magnet with the piston links to each other, and the piston inserts in the cylinder, inhale exhaust apparatus and set up between cylinder and second fixed connection spare, including exhaust chamber, suction chamber, discharge valve and suction valve, exhaust chamber and suction chamber are two mutually independent cavitys, suction valve and discharge valve syntropy set up the tip at the cylinder or the tip of the piston that sets up relatively with discharge valve.
(III) advantageous effects
The magnetic circuit structure of the motor is symmetrically distributed (the two sheet type permanent magnets, the first magnetic conductor and the second magnetic conductor form a symmetrical magnetic circuit), the symmetrical magnetic circuit structure can reduce the magnetic circuit loss at the end part of the coil by increasing the length-width ratio of the coil, maximally utilize the periphery of the coil to generate a magnetic field, and improve the utilization rate of coil materials. The compression parts such as the cylinder and the piston are arranged on the outer side of the motor, so that the compressor is in a slender horizontal structure and is suitable for some low-space applications.
Drawings
FIG. 1 is a top view of a first embodiment of the present invention;
FIG. 2 is a schematic axial view of a first embodiment of the present invention;
FIG. 3 is a top view of a second embodiment of the present invention;
fig. 4 is a schematic axial view of a second embodiment of the present invention.
Wherein the first magnetic conductor 1; an excitation coil 2; a second magnetic conductor 3; an air gap 4; a first fixed connection 5; a second fixed connection 6; a sheet-type permanent magnet 7; a connecting member 8; a resonance member 9; a third fixed connection 10; a piston 11; a cylinder 12; an air suction and exhaust device 13; a first set of assembly holes 14; a second set of assembly holes 15; and a strip seam 16.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example one
As shown in fig. 1 and 2, the present embodiment includes a moving magnet linear oscillation motor, a cylinder 12, a piston 11, an intake/exhaust device 13, and a resonance component 9.
The moving magnet type linear oscillation motor comprises a stator component, a rotor component, a first fixed connecting piece 5, a second fixed connecting piece 6 and a third fixed connecting piece 10; the cylinder 12 is arranged on the third fixed connecting piece 10, and the installation direction of the cylinder is the same as that of the piston 11; the piston 11 is arranged on the rotor component; the air suction and exhaust device 13 is arranged at the end part of the cylinder 12; the resonance part 9 is installed between the mover part and the third fixed coupling 10.
The stator part comprises a first magnetic conductor 1 centrally arranged and centered around a central column with an excitation coil 2, and two second magnetic conductors 3 (approximately trapezoidal) arranged on either side of the first magnetic conductor 1. The longitudinal sections of the two first magnetic conductors 1 are like two 'mountain' shapes and are symmetrically arranged up and down in a face-to-face mode, and two symmetrical long strip-shaped air gaps 4 are formed between the first magnetic conductors 1 and the second magnetic conductors 3 on two sides. The first magnetic conductor 1 and the second magnetic conductor 3 are magnetic conductors formed by stacking silicon steel sheets or magnetic conductors formed by processing magnetic conductive materials such as ferrite powder, amorphous nanocrystalline alloy or beryllium-mullite alloy.
The rotor part comprises two sheet type permanent magnets 7 symmetrically arranged in the long-strip-shaped air gaps 4 on two sides and a connecting part 8 for assembling the permanent magnet sheets. Two groups of trapezoidal piece formula magnetic materials pile up along the direction of height, and the symmetry is placed in the both sides of first magnetic conductor 1, forms second magnetic conductor 3. Two groups of parallel sheet type permanent magnets 7 are assembled at two ends of one side of a connecting part 8, and the other side of the connecting part 8 is connected with a piston 11 with a smooth outer surface.
The fixed connection piece includes: a plate-shaped first fixing attachment 5 provided with an assembly hole, a plate-shaped second fixing attachment 6 provided with an assembly hole and a pair of parallel slits, and a third fixing attachment 10 provided with an assembly hole. The first and second fixed connectors 5 and 6 are fitted on both sides of the first and second magnetic conductors 1 and 3 and fixedly connected through the first set of fitting holes 14. The second fixed connection member 6 is provided with a pair of parallel slots 16 corresponding in height, width and position to the air gap 4. The sheet type permanent magnets 7 at two ends are respectively inserted into the air gap of the stator component through the strip slots 16 on the second fixed connecting piece 6, meanwhile, the piston 11 is inserted into the air cylinder 12 on the third fixed connecting piece 10, and the third fixed connecting piece 10 and the second fixed connecting piece 6 are fixedly assembled through the second assembling hole group 15. The positioning of the sheet permanent magnet 7 in the air gap is realized by the high-smoothness precision fit between the piston 11 and the cylinder 12.
And a piston 11 arranged on the mover component is matched and arranged in the cylinder 12, so that the axial positioning of the mover component is realized. A cylinder 12 is provided on the third fixed link 10.
The resonance part 9 is installed between the third fixed connector 10 and the connection part 8, and between the second fixed connector 6 and the connection part 8. The resonator member 9 consists of one or more cylindrical springs or plate springs.
The air suction and exhaust device 13 is arranged at the end of the cylinder 12 and comprises an exhaust cavity, an air suction cavity, an exhaust valve, an air suction valve and the like, the exhaust cavity and the air suction cavity are two mutually independent cavities, and the air suction valve and the exhaust valve are arranged at the end of the cylinder 12 in the same direction or at the end of the piston 11 opposite to the exhaust valve.
The working principle of the linear compressor is as follows:
the two sheet type permanent magnets 7 are symmetrically magnetized in the direction perpendicular to the length direction of the air gap 4, a symmetrical magnetic circuit is formed by the two sheet type permanent magnets, the excitation coil 2 wound around the center column of the first magnetic conductor 1 is connected with alternating current, so that a magnetic field with alternating positive and negative directions is generated in the long strip-shaped air gap 4, and the rotor component and the resonance component 9 do reciprocating oscillating motion along the length direction of the air gap 4 under the action of the alternating magnetic field. The piston 11 connected with the mover member reciprocates in the cylinder 12: the piston 11 moves to one side, when the pressure in the cylinder 12 is less than the suction pressure, the suction valve opens and sucks the gas, the piston 11 moves in the reverse direction, the gas is compressed, when the pressure in the cylinder 12 is more than the discharge pressure, the discharge valve opens and discharges the gas, and so on. The symmetrical magnetic circuit structure can reduce the magnetic circuit loss at the end part of the exciting coil by increasing the length-width ratio of the exciting coil, utilize the magnetic field generated at the periphery of the exciting coil to the maximum extent and improve the utilization rate of materials.
Example two
As shown in fig. 2, the structure of the moving-magnet linear oscillation motor of the present embodiment is the same as that of the moving-magnet linear oscillation motor of the first embodiment, except that: one side of the connecting member 8, on which the two sets of parallel plate-type permanent magnets 7 are fitted, is connected to a piston 11 having a smooth outer surface. The cylinder 12 is arranged on the second fixed connection 6 in the opposite direction to the piston 11. The piston 11 is inserted into a cylinder 12 on the second fixed connection 6. The suction and exhaust device 13 is provided between the cylinder 12 and the second fixed attachment 6.
The working principle of the second embodiment is the same as that of the first embodiment.
The above description is only an embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. A linear compressor driven by a moving magnet type linear oscillating motor is characterized by comprising the moving magnet type linear oscillating motor, a cylinder (12), a piston (11), an air suction and exhaust device (13) and a resonance component (9); wherein,
the moving magnet type linear oscillation motor comprises a stator component, a rotor component, a first fixed connecting piece (5), a second fixed connecting piece (6) and a third fixed connecting piece (10); the piston (11) is arranged on the rotor component; the air suction and exhaust device (13) is arranged at the end part of the cylinder (12); the resonance part (9) is arranged between the rotor part and the third fixed connecting piece (10);
the stator component comprises a first magnetic conductor (1) which is arranged in the middle and is provided with a central column wound with an excitation coil (2), and two second magnetic conductors (3) which are arranged on two sides of the first magnetic conductor (1); two symmetrical air gaps (4) are formed between the first magnetic conductor (1) and the second magnetic conductors (3) on two sides;
the rotor part comprises two groups of sheet type permanent magnets (7) which are respectively and symmetrically arranged in the two air gaps (4),
the first fixed connecting piece (5) is a plate-shaped connecting piece provided with an assembling hole; the second fixed connecting piece (6) is a plate-shaped connecting piece provided with an assembling hole and a strip seam (16); the third fixed connecting piece (10) is a connecting piece provided with an assembling hole; the first fixed connecting piece (5) and the second fixed connecting piece (6) are assembled at two sides of the first magnetic conductor (1) and the second magnetic conductor (3) and fixedly connected through a first assembling hole group (14); the third fixed connecting piece (10) is fixedly assembled with the second fixed connecting piece (6) through a second assembling hole group (15); two groups of sheet permanent magnets (7) are respectively inserted into two air gaps (4) of the stator component through strip slits (16) on the second fixed connecting piece (6).
2. Linear compressor according to claim 1, characterized in that the mover member further comprises a connecting member (8), the sheet type permanent magnet (7) being mounted on the connecting member (8).
3. Linear compressor according to claim 1, characterized in that the piston (11) is mounted in a cylinder (12) and cooperates with the latter to achieve the positioning of the lamellar permanent magnets (7) in the air gap (4) and the axial positioning of the mover member.
4. Linear compressor according to claim 2, characterized in that the resonant member (9) is mounted between the third fixed connection (10) and the connecting member (8), and between the second fixed connection (6) and the connecting member (8).
5. Linear compressor according to claim 1, characterized in that the cylinder (12) is arranged on the third fixed connection (10) in the same direction as the piston (11).
6. The linear compressor according to claim 2, wherein two sets of the sheet type permanent magnets (7) are parallel to each other, and the two sets of the sheet type permanent magnets (7) which are parallel are respectively assembled at both ends of one side of the connection member (8), the other side of the connection member (8) is connected to the piston (11), and the piston (11) is inserted into the cylinder (12).
7. Linear compressor according to any of claims 1 to 6, characterized in that the suction and exhaust means (13) are arranged at the end of the cylinder (12) and comprise a discharge chamber, a suction chamber, an exhaust valve and a suction valve, the discharge chamber and the suction chamber are two independent chambers, and the suction valve is arranged at the end of the cylinder (12) or at the end of the piston (11) opposite to the exhaust valve in the same direction as the exhaust valve.
8. Linear compressor according to claim 1, characterized in that the cylinder (12) is arranged on the second fixed connection (6) in the opposite direction to the piston (11).
9. The linear compressor according to any one of claims 1 to 4 and 8, wherein two sets of sheet-type permanent magnets (7) are parallel to each other, and the two sets of sheet-type permanent magnets (7) which are parallel to each other are assembled on one side of the connecting member (8), one side of the connecting member (8) on which the sheet-type permanent magnets (7) are assembled is connected with the piston (11), and the piston (11) is inserted into the cylinder (12), the suction and exhaust device (13) is disposed between the cylinder (12) and the second fixed connecting member (6) and comprises an exhaust chamber, a suction chamber, an exhaust valve and a suction valve, the exhaust chamber and the suction chamber are two independent chambers, and the suction valve and the exhaust valve are disposed at the end of the cylinder (12) or at the end of the piston (11) disposed opposite to the exhaust valve in the same direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110202468.5A CN102889192B (en) | 2011-07-19 | 2011-07-19 | Linear compressor driven by moving magnet type linear oscillation motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110202468.5A CN102889192B (en) | 2011-07-19 | 2011-07-19 | Linear compressor driven by moving magnet type linear oscillation motor |
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| CN102889192A CN102889192A (en) | 2013-01-23 |
| CN102889192B true CN102889192B (en) | 2015-03-18 |
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| CN103560639A (en) * | 2013-11-20 | 2014-02-05 | 东南大学 | High power factor linear reciprocating oscillation motor |
| CN107425621A (en) * | 2017-09-11 | 2017-12-01 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of flattening electric machine structure and compressor |
| CN110017258A (en) * | 2019-05-20 | 2019-07-16 | 台州市星亚科技股份有限公司 | A kind of straight line air compressor machine |
| CN113374668A (en) * | 2020-02-25 | 2021-09-10 | 中国科学院理化技术研究所 | Square linear compressor |
| CN113691099B (en) * | 2021-08-05 | 2022-12-09 | 河南理工大学 | High-efficient quick electric permanent magnetism stopper |
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