CN107762769B - Linear compressor and control method thereof - Google Patents
Linear compressor and control method thereof Download PDFInfo
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- CN107762769B CN107762769B CN201610687695.4A CN201610687695A CN107762769B CN 107762769 B CN107762769 B CN 107762769B CN 201610687695 A CN201610687695 A CN 201610687695A CN 107762769 B CN107762769 B CN 107762769B
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- linear compressor
- stator
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- compressor
- cylinder
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- 238000000034 method Methods 0.000 title claims description 18
- 239000003507 refrigerant Substances 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 6
- 238000007906 compression Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/005—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders with two cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0005—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The invention provides a linear compressor, which comprises a shell, wherein two end parts of the shell are respectively provided with a motor module, each motor module comprises a cylinder, a piston, a stator, a coil, a rotor and a permanent magnet, the piston is arranged on the rotor and is arranged in the cylinder in a sliding manner, the stator is provided with the coil, the stator is arranged on the cylinder, and the permanent magnet is arranged on the rotor and is positioned in a magnetic field range formed by the coil; a resonant plate spring is arranged between the two motor modules, and the rotor is fixed on the resonant plate spring. The overall structure of the linear compressor is simplified to facilitate rapid assembly and to improve the motor efficiency of the linear compressor.
Description
Technical Field
The present invention relates to a compressor, and more particularly, to a linear compressor and a control method thereof.
Background
At present, a compressor used in a refrigeration device has two types, namely a rotary type compressor and a linear type compressor, and a linear compressor in the prior art generally comprises a shell, a stator, a coil, a rotor, a piston, a cylinder, a spring rear baffle, a spring and other components; the rotor is provided with a magnet, the magnet is inserted into a magnetic field space formed by the stator, a coil is arranged in the stator, one end of the piston is connected to the rotor, and the other end of the piston is inserted into an inner cavity of the cylinder. In the using process, the coil is electrified to generate an alternating magnetic field to drive the rotor to drive the piston to reciprocate at high frequency. However, only one stroke is useful work during the reciprocating motion of the piston, and the other stroke is useless work, and chinese patent No. 200720087539.0 discloses a double-cylinder electromagnetic compressor, which performs useful work during the reciprocating motion of the piston, but the technical solutions disclosed in the above patents have resonant plate springs disposed at both ends of the housing, and two coils disposed at the middle of the housing. The invention aims to solve the technical problem of how to design a linear compression molding machine which is simple in structure, convenient to assemble and high in motor efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a linear compressor and a control method thereof are provided to simplify an overall structure of the linear compressor for a rapid assembly and to improve a motor efficiency of the linear compressor.
The invention provides a technical scheme that the linear compressor comprises a shell and is characterized in that two end parts of the shell are respectively provided with a motor module, each motor module comprises a cylinder, a piston, a stator, a coil, a rotor and a permanent magnet, the piston is arranged on the rotor and is arranged in the cylinder in a sliding manner, the stator is provided with the coil, the stator is arranged on the cylinder, and the permanent magnet is arranged on the rotor and is positioned in a magnetic field range formed by the coil; a resonant plate spring is arranged between the two motor modules, and the rotor is fixed on the resonant plate spring.
Further, two of the coils are connected in series.
Furthermore, the number of winding turns of the two coils is the same, and the winding directions of the two coils are opposite.
Further, the magnetic poles of the permanent magnets on two sides of the rotor are opposite.
Further, the motor modules are fixedly connected together through a connecting piece.
Furthermore, the connecting piece includes first connecting block and second connecting block, first connecting block with one of them stator fixed connection, the second connecting block with another stator fixed connection, first connecting block with second connecting block detachable links together.
Further, the stator comprises an inner stator and an outer stator, the coil is arranged on the inner stator, the inner stator and the outer stator are fixed on the corresponding air cylinders, and the connecting piece is welded or bonded on the outer stator.
Further, the two rotors are of two independent split structures, or the two rotors are of an integral structure.
Further, the plate spring is a concentric vortex arm plate spring, an eccentric vortex arm plate spring or a linear arm plate spring.
The present invention also provides a control method of a linear compressor, the linear compressor adopts the above linear compressor, two end portions of the linear compressor are a first end portion and a second end portion respectively, the control method is:
when the linear compressor is not electrified, the permanent magnet on the rotor is positioned at the middle position of the corresponding stator;
after the linear compressor is introduced with positive alternating current, coils in the stator generate an alternating magnetic field, the permanent magnets on the two rotors generate magnetic force towards the direction of the first end part of the linear compressor in the corresponding alternating magnetic fields, the air cylinder positioned at the position of the first end part of the linear compressor compresses refrigerant gas, and the air cylinder positioned at the position of the second end part of the linear compressor absorbs the refrigerant gas;
after the linear compressor is electrified with reverse alternating current, coils in the stators generate alternating magnetic fields, the permanent magnets on the two rotors generate magnetic forces towards the direction of the second end of the linear compressor in the corresponding alternating magnetic fields, the air cylinder positioned at the first end of the linear compressor absorbs refrigerant gas, and the air cylinder positioned at the second end of the linear compressor compresses the refrigerant gas.
the invention provides a linear compressor and a control method thereof.A cylinder is respectively arranged at two end parts of a shell, stators are correspondingly arranged on the cylinder, a rotor is arranged between the two stators, so that the distance between the two stators is large enough, magnetic fields generated by the two coils are not influenced mutually, the magnetic field saturation generated by the mutual influence between the coils on the two stators is reduced, two permanent magnets do work simultaneously, the motor force of the compressor during gas compression is doubled, the current I of the compressor is doubled when the input power of the compressor is kept unchanged according to the input power P = F v = α I v, F is the motor force, v is the rotor speed, on one hand, the higher harmonic loss of the compressor is reduced when the current is reduced, the motor efficiency is improved, on the other hand, the motor efficiency is higher when the current is reduced, the demagnetization of the permanent magnets of the compressor can be avoided, a resonant plate spring of the compressor is arranged in a space between the rotor and the stator and is not influenced by the inner diameter size of the stators, so that the whole structure is simple and convenient to assemble, and the motor efficiency of the linear compressor is effectively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of an embodiment of a linear compressor according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the linear compressor of the present embodiment includes a housing 1, motor modules are respectively disposed at two ends of the housing 1, each motor module includes a cylinder 3, a piston 4, a stator 5, a coil 6, a mover 2 and a permanent magnet 8, the two ends of the housing 1 are respectively provided with the cylinders 3, the mover 2 is fixedly connected to the piston 4, the piston 4 is slidably disposed in the corresponding cylinder 3, one side of each cylinder 3 is provided with the stator 5, each stator 5 is provided with the coil 6, the mover 2 is further provided with the permanent magnet 7 corresponding to the stator 5, a resonant plate spring 8 is disposed between the two motor modules, and the mover 2 is fixed to the resonant plate spring 8.
specifically, in the linear compressor of the embodiment, cylinders 3 are arranged at two ends of a shell 1, each cylinder 3 is provided with a stator 5, a piston 4 and a permanent magnet 7 are arranged on a rotor 2, the pistons 4 reciprocate in the corresponding cylinders 3, in the actual use process, the two stators 5 are spaced from each other, so that magnetic fields generated by coils 6 in the stators 5 cannot interfere with each other, in addition, by controlling the alternating current phase of each coil 6 and the magnetic pole direction of the permanent magnet 7, the two permanent magnets 7 can generate magnetic forces in the same direction in the respective magnetic fields, so that superposed forces in the same direction are generated in the two rotors 2 to increase the motor force generated by the rotor 2, for the cylinder 3 at one end, if in a state of compressing refrigerant gas, the cylinder 3 at the other end is in a state of absorbing gas, and according to the input power P = F v = l, F is the motor force, v is the rotor speed, when the input power of the compressor is kept unchanged, the current I of the compressor is reduced by one time, on the one hand, the harmonic loss of the compressor is reduced, the benefit of improving the higher current efficiency, the motor efficiency, the integral type of the motor can be realized by adopting a spring, the structure of a split type of a spring, the motor 2, the stator 5 can also be adopted, the structure of a split type of a spring is adopted, the motor 2, and a structure can be adopted, the stator 5, and a structure of a split type of a fixed spring can be adopted, and a front arm 3, and a structure can be adopted, and a structure.
in order to simplify the control mode, two coils 6 are connected in series, the number of windings of the two coils 6 is the same, the winding directions of the two coils 6 are opposite, and the magnetic poles of the permanent magnets 7 on both sides of the mover 2 are opposite, specifically, when one piston 4 of the compressor performs a compression process, the other piston 4 performs an air suction process, the leads in the two coils 6 of the compressor are in a series structure, the currents in the two energized coils 6 are the same (I is the current), the directions are opposite, the formed magnetic fields are opposite, the two permanent magnets 7 act on the two permanent magnets 7 with opposite magnetic pole directions, the two permanent magnets 7 respectively generate motor forces in the same direction (F1 = α 1I, F2= α 2I, α 1, α 2 are the motor coefficients of the motor), and the permanent magnets 7 cause the mover 2 to move and act on the piston 4, so that the motor force on the piston 4 is doubled (F = F1+ F2= α 1+ I + α 2I).
Still further, the stators 5 are fixed on the corresponding cylinders 3, and the two stators 5 are fixedly connected together through a connecting piece 9. Specifically, each cylinder 3 and the stator 5 and the coil 6 connected thereto form an independent motor module, and in the actual assembly process, the two motor modules are fixedly connected together and installed in the housing 1 through the connecting member 9, wherein the connecting member 89 includes a first connecting block 91 and a second connecting block 92, the first connecting block 91 is fixedly connected with one of the stators 5, the second connecting block 92 is fixedly connected with the other stator 5, the first connecting block 91 and the second connecting block 92 are detachably and fixedly connected together through bolts, interference fit, clamping and the like, in the actual operation process, the connecting blocks can be fixed on the corresponding stators 5 first, and the connecting blocks and the stators 5 can be connected through fixing methods such as welding or bonding, wherein the stator 5 includes an inner stator 51 and an outer stator 52, the inner stator 51 is provided with the coil 6, the inner stator 51 and the outer stator 52 are fixed to the corresponding cylinder 3, and the connecting member 9 is welded or bonded to the outer stator 52.
The present invention also provides a control method of a linear compressor, the linear compressor adopts the above linear compressor, two end portions of the linear compressor are a first end portion and a second end portion respectively, the control method is:
when the linear compressor is not electrified, the permanent magnet on the rotor is positioned at the middle position of the corresponding stator;
after the linear compressor is introduced with positive alternating current, coils in the stator generate an alternating magnetic field, the permanent magnets on the two rotors generate magnetic force towards the direction of the first end part of the linear compressor in the corresponding alternating magnetic fields, the air cylinder positioned at the position of the first end part of the linear compressor compresses refrigerant gas, and the air cylinder positioned at the position of the second end part of the linear compressor absorbs the refrigerant gas;
after the linear compressor is electrified with reverse alternating current, coils in the stators generate alternating magnetic fields, the permanent magnets on the two rotors generate magnetic forces towards the direction of the second end of the linear compressor in the corresponding alternating magnetic fields, the air cylinder positioned at the first end of the linear compressor absorbs refrigerant gas, and the air cylinder positioned at the second end of the linear compressor compresses the refrigerant gas.
the invention provides a linear compressor and a control method thereof.A cylinder is respectively arranged at two end parts of a shell, stators are correspondingly arranged on the cylinder, a rotor is arranged between the two stators, so that the distance between the two stators is large enough, magnetic fields generated by the two coils are not influenced mutually, the magnetic field saturation generated by the mutual influence between the coils on the two stators is reduced, two permanent magnets do work simultaneously, the motor force of the compressor during gas compression is doubled, the current I of the compressor is doubled when the input power of the compressor is kept unchanged according to the input power P = F v = α I v, F is the motor force, v is the rotor speed, on one hand, the higher harmonic loss of the compressor is reduced when the current is reduced, the motor efficiency is improved, on the other hand, the motor efficiency is higher when the current is reduced, the demagnetization of the permanent magnets of the compressor can be avoided, a resonant plate spring of the compressor is arranged in a space between the rotor and the stator and is not influenced by the inner diameter size of the stators, so that the whole structure is simple and convenient to assemble, and the motor efficiency of the linear compressor is effectively.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A linear compressor comprises a shell and is characterized in that two end parts of the shell are respectively provided with a motor module, each motor module comprises a cylinder, a piston, a stator, a coil, a rotor and a permanent magnet, the piston is arranged on the rotor and is arranged in the cylinder in a sliding manner, the stator is provided with the coil, the stator is arranged on the cylinder, and the permanent magnet is arranged on the rotor and is positioned in a magnetic field range formed by the coil; a resonant plate spring is arranged between the two motor modules, and the rotor is fixed on the resonant plate spring.
2. A linear compressor as claimed in claim 1 wherein two of said coils are connected together in series.
3. The linear compressor of claim 2, wherein the two coils have the same number of winding turns and have opposite winding directions.
4. A linear compressor as claimed in claim 3, wherein the permanent magnets on both sides of the mover have opposite poles.
5. The linear compressor of claim 1, wherein the motor modules are fixedly connected together by a connecting member.
6. The linear compressor of claim 5, wherein the connecting member includes a first connecting block fixedly connected to one of the stators and a second connecting block fixedly connected to the other of the stators, the first and second connecting blocks being detachably connected together.
7. The linear compressor of claim 5, wherein the stator includes an inner stator on which the coil is disposed and an outer stator fixed to the corresponding cylinder, and the connecting member is welded or bonded to the outer stator.
8. The linear compressor of claim 1, wherein the two movers are of two independent split type structures, or the two movers are of an integral structure.
9. The linear compressor of claim 1, wherein the resonant leaf spring is a concentric scroll arm plate spring, an eccentric scroll arm plate spring, or a linear arm plate spring.
10. A control method of a linear compressor, wherein the linear compressor according to any one of claims 1 to 9 is used, and both end portions of the linear compressor are a first end portion and a second end portion, respectively, the control method comprising:
when the linear compressor is not electrified, the permanent magnet on the rotor is positioned at the middle position of the corresponding stator;
after the linear compressor is introduced with positive alternating current, coils in the stator generate an alternating magnetic field, the permanent magnets on the two rotors generate magnetic force towards the direction of the first end part of the linear compressor in the corresponding alternating magnetic fields, the air cylinder positioned at the position of the first end part of the linear compressor compresses refrigerant gas, and the air cylinder positioned at the position of the second end part of the linear compressor absorbs the refrigerant gas;
after the linear compressor is electrified with reverse alternating current, coils in the stators generate alternating magnetic fields, the permanent magnets on the two rotors generate magnetic forces towards the direction of the second end of the linear compressor in the corresponding alternating magnetic fields, the air cylinder positioned at the first end of the linear compressor absorbs refrigerant gas, and the air cylinder positioned at the second end of the linear compressor compresses the refrigerant gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687695.4A CN107762769B (en) | 2016-08-19 | 2016-08-19 | Linear compressor and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687695.4A CN107762769B (en) | 2016-08-19 | 2016-08-19 | Linear compressor and control method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN107762769A CN107762769A (en) | 2018-03-06 |
| CN107762769B true CN107762769B (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610687695.4A Active CN107762769B (en) | 2016-08-19 | 2016-08-19 | Linear compressor and control method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5163818A (en) * | 1990-02-05 | 1992-11-17 | Ametek, Inc. | Automatic constant air flow rate pump unit for sampling air |
| CN1138889A (en) * | 1994-11-14 | 1996-12-25 | 安东·施泰格尔 | Device for guiding and centering a machine component |
| US6889596B2 (en) * | 2002-01-29 | 2005-05-10 | Thales Nederland B.V. | Compressor cooler and its assembly procedure |
| CN101240793A (en) * | 2008-03-14 | 2008-08-13 | 刘新春 | Linear motor double cylinder compression pump |
| CN201116519Y (en) * | 2007-10-09 | 2008-09-17 | 何正文 | Double-cylinder electromagnetic compressor |
| CN101839229A (en) * | 2010-04-09 | 2010-09-22 | 黄道兴 | Dual-inlet and dual-outlet double cylinder electromagnetic air compressor |
| CN103696934A (en) * | 2013-12-20 | 2014-04-02 | 安鲁荣 | Double-cylinder linear compressor |
-
2016
- 2016-08-19 CN CN201610687695.4A patent/CN107762769B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5163818A (en) * | 1990-02-05 | 1992-11-17 | Ametek, Inc. | Automatic constant air flow rate pump unit for sampling air |
| CN1138889A (en) * | 1994-11-14 | 1996-12-25 | 安东·施泰格尔 | Device for guiding and centering a machine component |
| US6889596B2 (en) * | 2002-01-29 | 2005-05-10 | Thales Nederland B.V. | Compressor cooler and its assembly procedure |
| CN201116519Y (en) * | 2007-10-09 | 2008-09-17 | 何正文 | Double-cylinder electromagnetic compressor |
| CN101240793A (en) * | 2008-03-14 | 2008-08-13 | 刘新春 | Linear motor double cylinder compression pump |
| CN101839229A (en) * | 2010-04-09 | 2010-09-22 | 黄道兴 | Dual-inlet and dual-outlet double cylinder electromagnetic air compressor |
| CN103696934A (en) * | 2013-12-20 | 2014-04-02 | 安鲁荣 | Double-cylinder linear compressor |
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| Publication number | Publication date |
|---|---|
| CN107762769A (en) | 2018-03-06 |
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Effective date of registration: 20201110 Address after: 266101 No. 1 Haier Road, Laoshan District, Shandong, Qingdao Patentee after: QINGDAO HAIER SMART TECHNOLOGY R&D Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER SMART TECHNOLOGY R&D Co.,Ltd. |
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