CN107061221B - Linear compressor - Google Patents
Linear compressor Download PDFInfo
- Publication number
- CN107061221B CN107061221B CN201710356265.9A CN201710356265A CN107061221B CN 107061221 B CN107061221 B CN 107061221B CN 201710356265 A CN201710356265 A CN 201710356265A CN 107061221 B CN107061221 B CN 107061221B
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- cylinder
- vacuum
- valve
- rotor
- linear compressor
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- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 239000003507 refrigerant Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- 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
- F04B49/12—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 by varying the length of stroke of the working members
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention provides a linear compressor, which comprises a shell, a stator, a piston, a cylinder, a rotor, a spring and a back baffle, wherein the stator, the piston, the cylinder, the rotor, the spring and the back baffle are arranged in the shell, the head of the piston is arranged in the cylinder in a sliding manner, the piston is fixed on the rotor, the spring is arranged between the rotor and the back baffle as well as between the rotor and the stator, and one side of the shell, which is positioned on the back baffle, is also provided with an air suction tube; under the drive of the rotor, the vacuum cylinder body and the movable plug move relatively. The efficiency of the linear compressor is improved and the energy consumption is reduced.
Description
Technical Field
The invention relates to a compressor, in particular to a linear compressor.
Background
At present, a compressor used in a refrigeration device has two types, namely a rotary type compressor and a linear type compressor, and the linear compressor in the prior art generally comprises a shell, a stator, a coil, a rotor, a piston, a cylinder, a 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, the head of the piston is slidably arranged in an inner cavity of the cylinder, and the shell is also provided with an air suction tube. Chinese patent No. 021020825 discloses a gas compression device of a reciprocating compressor, which realizes the position adjustment of a piston by adopting a mode that a variable piston is matched with an original position control cylinder, high-pressure gas output by a cylinder is shunted to the original position control cylinder, and the shunted gas is used for adjusting the position of the piston, so as to meet the requirement of minimum operation of a clearance between the piston and the cylinder under different load conditions, thereby achieving the purpose of improving efficiency. However, in the actual use process, the original position control cylinder divides the pressure of the compressed gas, so that the loss of high load is caused, meanwhile, the temperature of the whole motor and the exhaust cavity with high load is increased, so that the temperature of the sucked gas is also increased, the sucked gas amount is reduced under the unit sucked gas amount, and the efficiency is relatively reduced. The invention aims to solve the technical problem of how to design a linear compressor with low energy loss and high motor efficiency.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provided is a linear compressor which can improve the efficiency of the linear compressor and reduce the energy consumption.
The invention provides a technical scheme that the linear compressor comprises a shell, a stator, a piston, a cylinder, a rotor, a spring and a back baffle which are arranged in the shell, wherein the head of the piston is arranged in the cylinder in a sliding manner, the piston is fixed on the rotor, the spring is arranged between the rotor and the back baffle as well as between the rotor and the stator, an air suction cylinder is also arranged on one side of the back baffle on the shell, a first valve for opening and closing the air suction cylinder is arranged on the air suction cylinder, a vacuum cavity assembly is also arranged between the rotor and the back baffle, the vacuum cavity assembly comprises a vacuum cylinder body and a movable plug which is arranged in the vacuum cylinder body in a sliding manner, and the vacuum cavity assembly also comprises a second valve for opening and closing the vacuum cylinder body; under the drive of the rotor, the vacuum cylinder body and the movable plug move relatively.
Furthermore, the vacuum cylinder body is fixed on the rear baffle, an air hole is formed in the vacuum cylinder body, the second valve is connected to the air hole, and the movable plug is fixed on the rotor.
Furthermore, a vent pipe communicated with the vacuum cylinder body is arranged on the rear baffle, and the second valve is arranged on the vent pipe.
Further, the movable plug is fixed on the rear baffle, the movable plug is provided with an air hole communicated with the vacuum cylinder body, the second valve is connected to the air hole, and the vacuum cylinder body is fixed on the rotor.
Furthermore, the movable plug is of a hollow structure, a vent pipe of the inner cavity of the movable plug is arranged on the rear baffle, and the second valve is arranged on the vent pipe.
Furthermore, the air suction cylinder is connected with the vacuum cavity component through a tee joint.
Further, the tee is connected between the first valve and the second valve.
According to the linear compressor provided by the invention, the vacuum cavity assembly is arranged between the rear baffle and the rotor, the vacuum cavity assembly can adjust the internal vacuum degree through the matching of the two valves, the vacuum degrees of the vacuum cavity assembly are different, and the acting forces applied to the rotor through the movable plug are different, so that the stroke of the rotor driving the piston to move is changed, the clearance minimum operation between the piston and the cylinder is met under different load conditions, the capacity of the cylinder is automatically adjusted along with the load change, and the purpose of improving the efficiency is achieved; more importantly, as the vacuum cavity component utilizes a low-pressure gas partial pressure method, more heat cannot be generated in the operation process, so that the temperature of air suction is kept in a lower range, the air suction quantity of the air suction cylinder is improved, the vacuum cavity component is matched with two valves, the required vacuum degree can be easily achieved, and the loss improvement effect is more obvious.
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;
FIG. 2 is a schematic view of a first embodiment of a linear compressor according to the present invention;
fig. 3 is a schematic view of a partial structure of a linear compressor according to an embodiment of 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, and a piston 2, a cylinder 3, a stator 4, a coil 6, a mover 7, a spring 81, and a back plate 8, which are disposed in the housing 1, wherein a head 21 of the piston 2 is capable of sliding in the cylinder 3, an exhaust valve 31 is disposed on the cylinder 3, the piston 2 is fixed on the mover 7, the spring 81 is positioned by the back plate 8, the mover 7 is connected to the spring 81, the coil 6 is mounted on the stator 4, and the housing 1 is further provided with a suction tube 5. In order to realize the volume adjustability of the cylinder 3 in the compressor, a first valve 51 for opening and closing the suction cylinder 5 is arranged on the suction cylinder 5, a vacuum cavity assembly 9 is further arranged between the mover 7 and the back plate 8, the vacuum cavity assembly 9 comprises a vacuum cylinder 91 and a movable plug 92 slidably arranged in the vacuum cylinder 91, and the vacuum cavity assembly 9 further comprises a second valve 93 for opening and closing the vacuum cylinder 91; the vacuum cylinder 91 and the movable plug 92 are relatively moved by the mover 7.
Specifically, the suction tube 5 of the true linear compressor of the present embodiment is configured with the first valve 51, and the vacuum chamber assembly 9 is configured with the second valve 93, when the load increases, by closing the first valve 51, the pressure in the vacuum cylinder 91 also decreases, and after the pressure decreases to a set value, the second valve 93 is closed, the vacuum degree of the vacuum cylinder 91 is maintained, for the mover 7 connected to the movable plug 92, the mover 7 is pulled, under the action of the negative pressure, the mover 7 together with the piston 2 moves in the direction away from the exhaust valve plate 31, the compression space of the piston 2 in the cylinder 3 increases, when the TDC position is maintained, the effective volume increases, and a greater amount of cooling can be exerted, so that the increase of the cooling capacity required by the increase of the load of the refrigeration equipment can be satisfied; when the load of the refrigeration equipment system is reduced, the second valve 93 is opened, the refrigerant can enter the vacuum cylinder 91, the vacuum degree is reduced, the effect of gas elasticity is achieved, the mover 7 is pushed, the mover 7 and the piston 2 move towards the direction close to the exhaust valve plate 31, the compression space of the piston 2 in the cylinder 3 is reduced, when the TDC position is kept in operation, the effective volume is reduced, the exerted cold quantity is reduced, and the synchronization with the load reduction is achieved.
Among them, there are various ways for installing the vacuum cylinder 91 and the movable plug 92 in the vacuum chamber assembly 9, for example: as shown in fig. 2, the vacuum cylinder 91 is fixed to the backplate 8, the vacuum cylinder 91 is provided with an air hole, the second valve 93 is connected to the air hole, the movable plug 92 is fixed to the mover 7, specifically, an air pipe (not labeled) communicating with the vacuum cylinder 91 may be provided on the backplate 8, and the second valve 93 is provided on the air pipe. Or, as shown in fig. 3, the movable plug 92 is fixed on the backplate 8, the movable plug 9 is provided with an air hole communicated with the vacuum cylinder 91, the second valve 93 is connected to the air hole, the vacuum cylinder 91 is fixed on the mover 7, specifically, the movable plug 92 is a hollow structure, the backplate 8 is provided with a vent pipe (not marked) connected with an inner cavity of the movable plug 92, and the second valve 93 is arranged on the vent pipe. In addition, as shown in fig. 3, the suction cylinder 5 and the vacuum chamber assembly 9 may be connected by a tee 52, and the tee 52 is connected between the first valve 51 and the second valve 93.
In the actual control process, after the controller of the linear compressor automatically finds the top dead center, the position of the top dead center is compared with the stroke or the power, and the volume of the cylinder is adjusted by using the parameters of the stroke or the power, which is specifically as follows:
the control and regulation method based on the stroke comprises the following steps: when the linear compressor is in a top dead center state, judging the size of the current stroke X of the piston and the size of the reference stroke X0 of the piston; if X is less than X0, the refrigerant in the shell enters the vacuum cylinder body to reduce the vacuum degree in the vacuum cylinder body by opening the first valve and the second valve, and the movable plug pushes the piston to move towards the direction of the exhaust valve plate of the cylinder through the stator; if X > X0, through closing first valve and opening the second valve, outside the refrigerant discharge shell completely through linear compressor's suction and exhaust effect with the shell in to improve the vacuum in the vacuum cylinder body, then, close the second valve again to open first valve, the movable plug drags the piston through the stator and removes to the exhaust valve piece direction of keeping away from the cylinder. Specifically, the stroke can be divided into a plurality of gears, the gear is more than or equal to 2, namely X1, X2, … … Xn-1, Xn, and the reference stroke X0, so that the opening and closing of the first valve 51 and the second valve 93 are adjusted, when reaching the top dead center, it is judged that when Xn is less than X0, it indicates that a clearance exists, the vacuum degree in the vacuum cavity should be reduced, and by opening the second valve, a part of refrigerant enters the vacuum cylinder body, so that the pressure of the vacuum cylinder body is increased, and the piston is pushed to move towards the exhaust valve plate 18 of the cylinder; on the contrary, when Xn is larger than X0, it indicates that the clearance is exceeded and the phenomenon of collision with the exhaust valve plate occurs, the vacuum degree in the vacuum cylinder body should be increased, the refrigerant is not allowed to flow back into the shell by closing the first valve, the second valve is opened, the refrigerant in the shell is completely discharged out of the shell by the suction and exhaust effects of the compressor, so that the vacuum degree in the vacuum cylinder body is also increased, at this time, the second valve is closed again, the vacuum degree in the vacuum cylinder body is maintained, the first valve is opened again, negative pressure is generated in the vacuum cylinder body, and the piston is pulled to move towards the direction of the exhaust valve plate far.
The power-based control and regulation method comprises the following steps: when the linear compressor is in a top dead center state, judging the current power P of the linear compressor and the reference power P0 of the linear compressor; if P is less than P0, the refrigerant in the shell enters the vacuum cylinder body to reduce the vacuum degree in the vacuum cylinder body by opening the first valve and the second valve, and the movable plug pushes the piston to move towards the direction of the exhaust valve plate of the cylinder through the stator; if P > P0, through closing first valve and opening the second valve, outside the refrigerant discharge shell completely through linear compressor's suction and exhaust effect with the shell in to improve the vacuum in the vacuum cylinder body, then, close the second valve again to open first valve, the movable plug drags the piston through the stator and removes to the exhaust valve piece direction of keeping away from the cylinder. Specifically, the power may be divided into a plurality of gears, the gear is greater than or equal to 2, i.e., P1, P2, … … Pn-1, Pn, and the reference power P0, and the specific process refers to the above-mentioned stroke control method, which is not described herein again.
According to the linear compressor provided by the invention, the vacuum cavity assembly is arranged between the rear baffle and the rotor, the vacuum cavity assembly can adjust the internal vacuum degree through the matching of the two valves, the vacuum degrees of the vacuum cavity assembly are different, and the acting forces applied to the rotor through the movable plug are different, so that the stroke of the rotor driving the piston to move is changed, the clearance minimum operation between the piston and the cylinder is met under different load conditions, the capacity of the cylinder is automatically adjusted along with the load change, and the purpose of improving the efficiency is achieved; more importantly, as the vacuum cavity component utilizes a low-pressure gas partial pressure method, more heat cannot be generated in the operation process, so that the temperature of air suction is kept in a lower range, the air suction quantity of the air suction cylinder is improved, the vacuum cavity component is matched with two valves, the required vacuum degree can be easily achieved, and the loss improvement effect is more obvious.
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 (7)
1. A linear compressor comprises a shell, a stator, a piston, a cylinder, a rotor, a spring, a coil and a rear baffle which are arranged in the shell, the head of the piston is arranged in the cylinder in a sliding way, the piston is fixed on the mover, a spring is arranged between the rotor and the rear baffle and between the rotor and the stator, an air suction tube is also arranged on one side of the rear baffle on the shell, an exhaust valve plate is arranged on the air cylinder, the coil is arranged on the stator, it is characterized in that a first valve for opening and closing the air suction cylinder is arranged on the air suction cylinder, a vacuum cavity component is also arranged between the rotor and the rear baffle plate, the vacuum cavity assembly comprises a vacuum cylinder body and a movable plug which is slidably arranged in the vacuum cylinder body, and the vacuum cavity assembly also comprises a second valve for opening and closing the vacuum cylinder body; under the drive of the rotor, the vacuum cylinder body and the movable plug move relatively.
2. The linear compressor of claim 1, wherein the vacuum cylinder is fixed to the backplate, the vacuum cylinder has an air hole, the second valve is connected to the air hole, and the movable plug is fixed to the mover.
3. The linear compressor of claim 2, wherein the backplate is provided with a vent pipe communicating with the vacuum cylinder, and the second valve is provided on the vent pipe.
4. The linear compressor of claim 1, wherein the movable plug is fixed to the backplate, the movable plug is provided with an air hole communicated with the vacuum cylinder, the second valve is connected to the air hole, and the vacuum cylinder is fixed to the mover.
5. The linear compressor of claim 4, wherein the movable plug is a hollow structure, a vent pipe is disposed on the back plate and is connected with the inner cavity of the movable plug, and the second valve is disposed on the vent pipe.
6. The linear compressor of claim 1, wherein the suction cylinder is connected to the vacuum chamber assembly by a tee joint.
7. The linear compressor of claim 6, wherein the tee is connected between the first valve and the second valve.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710052380 | 2017-01-24 | ||
| CN2017100523807 | 2017-01-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107061221A CN107061221A (en) | 2017-08-18 |
| CN107061221B true CN107061221B (en) | 2020-03-31 |
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ID=59610346
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710356265.9A Active CN107061221B (en) | 2017-01-24 | 2017-05-19 | Linear compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107061221B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4000016A1 (en) * | 1990-01-02 | 1991-07-04 | Hartmann Jordan Dipl Ing Fh | Stepless controllable piston vacuum pump - involves eccentrically mounted worm drive mechanism |
| CN102741551A (en) * | 2009-12-14 | 2012-10-17 | Acc奥地利有限公司 | Coolant compressor with linear drive |
| CN103748359A (en) * | 2011-06-14 | 2014-04-23 | 罗特康普压缩机有限责任公司 | Piston compressor |
| WO2015021117A1 (en) * | 2013-08-08 | 2015-02-12 | Emerson Climate Technologies, Inc. | Variable capacity reciprocating compressor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100461233B1 (en) * | 2001-12-03 | 2004-12-14 | 삼성광주전자 주식회사 | Apparatus for compressing fluid |
| CN206957893U (en) * | 2017-01-24 | 2018-02-02 | 青岛海尔智能技术研发有限公司 | Linear compressor |
-
2017
- 2017-05-19 CN CN201710356265.9A patent/CN107061221B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4000016A1 (en) * | 1990-01-02 | 1991-07-04 | Hartmann Jordan Dipl Ing Fh | Stepless controllable piston vacuum pump - involves eccentrically mounted worm drive mechanism |
| CN102741551A (en) * | 2009-12-14 | 2012-10-17 | Acc奥地利有限公司 | Coolant compressor with linear drive |
| CN103748359A (en) * | 2011-06-14 | 2014-04-23 | 罗特康普压缩机有限责任公司 | Piston compressor |
| WO2015021117A1 (en) * | 2013-08-08 | 2015-02-12 | Emerson Climate Technologies, Inc. | Variable capacity reciprocating compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107061221A (en) | 2017-08-18 |
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Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China 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. Patentee before: Qingdao Haier Joint Stock Co.,Ltd. |
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