EP1991783A1 - Verfahren zum justieren eines kolbens in einem linearverdichter - Google Patents
Verfahren zum justieren eines kolbens in einem linearverdichterInfo
- Publication number
- EP1991783A1 EP1991783A1 EP07704139A EP07704139A EP1991783A1 EP 1991783 A1 EP1991783 A1 EP 1991783A1 EP 07704139 A EP07704139 A EP 07704139A EP 07704139 A EP07704139 A EP 07704139A EP 1991783 A1 EP1991783 A1 EP 1991783A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- winding
- end position
- current
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- F04B35/045—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 using solenoids
Definitions
- the present invention relates to a method for operating a linear compressor, in particular for a refrigeration device.
- a linear compressor is e.g. from US 506032B2 and
- US 6642377B2 known. It comprises a reversing linear drive with a winding and an armature displaceable by a magnetic field generated by the winding against a spring force and a compression chamber in which a piston is coupled to the armature movable.
- the winding is subjected to an alternating current in order to drive a swinging motion of the armature.
- the amplitude of movement of the piston is strictly predetermined, this is not the case with a linear compressor.
- the armature can oscillate with different amplitudes depending on the winding supplied electrical drive power, and accordingly, the piston stroke is variable.
- the amplitude of the armature can become so great that the piston strikes a boundary of the compression chamber. This leads to a strong noise and possibly also to a damage of the compressor. In addition, the vibration of the armature and the driving alternating current get out of phase, so that for this reason the drive loses effectiveness. In order to be able to operate a linear compressor stably with good efficiency, it is therefore necessary to monitor the amplitude of the armature and to control the alternating current applied to the winding in such a way that the amplitude always remains just below a limit when it is exceeded the piston abuts a boundary.
- Tolerances in the manufacture of the linear compressors can cause the path that the armature can travel from its equilibrium position until the piston encounters a limit can vary from one linear compressor to another. If, taking into account the manufacturing tolerances of the armature stroke for all linear compressor is uniformly determined so that the piston can not hit the limit, resulting from one compressor to another significantly different dead volumes and thus different efficiencies.
- the equilibrium position in which the armature is with the compressor off, depending on the pressure prevailing in the compression chamber, acting on the piston pressure may be different. Different pressures can easily occur when using the linear compressor for compressing refrigerant in a refrigerator, depending on how the average temperature or the ratio of gaseous to liquid refrigerant in the refrigerant circuit of the device. If a refrigeration unit is put into operation new or after a long standstill and the refrigerant circuit has to be cooled down from room temperature, the pressure in the refrigerant circuit is initially higher than in an operating unit in which the cold room and consequently also at least part of the refrigerant clearly colder than room temperature.
- a vibration amplitude, which results in a usable device, a useful, small dead volume may be insufficient in the case of restart, since here the rest position, by which the armature oscillates, is shifted. If this results in a large dead volume, the efficiency of the compressor can be so far affected in extreme cases that a proper cooling down of the device is not possible.
- the object of the present invention is to provide a method for operating a linear compressor which avoids the problems described above.
- the object is achieved by a linear compressor comprising a linear drive with a winding and a displaceable by the magnetic field of the coil against a spring force armature and a compressor chamber in which a piston is coupled to the armature movable, wherein in operation, the winding is applied with an alternating current to drive a swinging motion of the armature, this winding is acted upon before operation with a direct current with a first sign to move the armature from a rest position by a first end position, the armature under the action of the Direct current is measured, measured, and during operation, the magnitude of the alternating current, with which the winding is energized, is controlled so that the armature does not reach the first end position or with vanishing speed.
- the first sign of the DC current is set so that is moved by the resulting from the action of the DC current displacement of the piston, the piston on a valve plate of the compression chamber, since in this direction, the freedom of movement of the piston is necessarily limited and accurate control of the piston stroke is required to ensure a small dead volume and thus a good efficiency.
- the winding is further supplied with a direct current opposite to the sign of the first sign before commencement of operation, that a second end position which the armature reaches under the effect of this direct current is measured, and that during operation
- the strength of the alternating current that energizes the winding is controlled so that the armature does not reach the second end position either at or with vanishing speed. In this way, the freedom of movement of the piston is measured in both directions, and the available - A -
- the strength of the DC current is expediently increased gradually to avoid that the piston abuts a boundary at high speed.
- the position of the armature is repeatedly measured, and as the end position, a position of the armature is determined over which the armature does not move with a further increase of the current strength. For as long as the deflection counteracts only the spring force and possibly the pressure in the compression chamber, it can be assumed that an increase in the current of the
- Direct current also leads to an increase in the deflection, unless the piston has reached the limit.
- a position of the armature can be determined as the end position in which it triggers a proximity sensor.
- a proximity sensor may for example be a light barrier.
- Fig. 1 is a schematic view, partly in plan view, partly in section, of a linear compressor
- Fig. 2 shows the time evolution of a given to the windings of the linear compressor of FIG. 1 direct current and the resulting measured value of
- Fig. 3 shows the time evolution of the oscillation amplitude and the charge quantities of the positive and negative half-waves of the winding current when starting the
- Fig. 1 shows schematically a linear compressor with a linear drive 1 and a compressor unit 2, which are held in a U-shaped frame 3 shown here.
- Iron cores 4 of E-shaped cross-section and windings 5 are mounted on two parallel legs of the frame 3 facing each other.
- An armature 6 is suspended in an air gap between the iron cores 4 by means of diaphragm springs 7, which keep the armature 6 slightly movable in the longitudinal direction of the air gap and rigid in the transverse direction.
- the armature 6 includes two antiparallel poled permanent magnets 8, 9, which endeavor to align themselves in a magnetic field generated by the windings 5 and the armature 6 thus depending on the direction of current flow through the windings 5 the armature in the perspective of FIG. Left or right float.
- the compressor unit 2 comprises a compression chamber 10, which is bounded on one side by a movable piston 1 1.
- the piston 1 1 is rigidly connected to the armature 6 via a piston rod 12.
- a support plate 13 is mounted, which is alternately provided with reflective or light-absorbing strip.
- a first light barrier with a light source 14 which emits a focused light beam onto the carrier plate 13 and a light sensor 15 aligned with the carrier plate 13 is mounted on one of the iron cores 4.
- the light sensor 15 receives more or less light.
- a comb-like structure may also be mounted on the armature 6, and light source 14 and light sensor 15 of the light barrier are mounted on the iron cores 4 on both sides of the comb structure, so that depending on the position of the armature 6, a tine of the comb structure the light sensor 15th shaded or the beam of the
- Light source 14 reaches the light sensor 15 through a gap between two prongs.
- a comb structure may also be provided a transparent support which is provided with spaced light-impermeable strips.
- a second photoelectric switch is around a quarter of a regular period
- Strip arrangement arranged offset.
- a control circuit 16 is connected, which supplies the windings 5 with electricity.
- the control circuit 16 receives from the outside, for example from a thermostat control of a refrigerator, in which the linear compressor of FIG. 1 is installed, a start-up command.
- the control circuit 16 then acts on the windings 5 with a direct current whose current intensity I, as shown by a dashed line in the diagram of Fig. 2, increases linearly with time t. Proportional to the current I increases the force acting on the armature 6 magnetic force, which drives the armature 6 in the perspective of FIG. 1 to the right.
- a direct current whose current intensity I, as shown by a dashed line in the diagram of Fig. 2
- Proportional to the current I increases the force acting on the armature 6 magnetic force, which drives the armature 6 in the perspective of FIG. 1 to the right.
- the control circuit 16 With increasing displacement of the armature 6 a strip of the carrier plate 13 after the other passes the photocells.
- the control circuit 16 detects the direction in which the armature 6 moves and increments (decrements, depending on the detected direction of movement) each time a stripe passes the first photoelectric switch 14,15 ) the control circuit 16 has a counter whose count n is thus representative of the distance traveled by the armature 6 from its rest position.
- the count value n thus forms a step function of the time t likewise shown in the diagram of FIG.
- the count value n will no longer increase even if the current strength continues to increase. This is detected by the control circuit 16 at a time indicated at d in FIG. 2, at which the current intensity I reaches a value 1 (n max ), to an increment of n which is to be expected when the previously observed relationship between I and n is continued absent.
- the freedom of movement of the armature 6, measured in steps of said counter, a fixed predetermined and stored in the control circuit 16 integer N.
- the control circuit corresponding to the contact of the piston 1 1 with the valve plate 17 count with the number N overwrites, a calibration of the position measurement is achieved: the limits of the permissible range of movement of the armature 6 correspond to a count of 0 or N.
- the control circuit 16 By counting up or down the detected by the light barrier strips, depending on the direction of movement of the armature 6, "knows" the control circuit 16 at all times the location of the armature. 6
- the control circuit reduces the current I in the windings 5 from the point in time d to a reversal of their signs, and in the opposite direction counts the strips which pass through the photoelectric barrier from zero upwards. This happens until again increasing the amount of current no longer leads to a further increase in the meter reading.
- the counter reading N thus obtained thus represents a measured value of the actual freedom of movement of the armature 6; he will be in the used the same way, as stated above for the fixed preset count N and explained in more detail below.
- the diagrams of Fig. 3 illustrate the recording of the oscillating operation of the linear compressor.
- the middle diagram schematically shows the time evolution of the position of the armature 6 and its target reversal points, the upper and the lower diagram respectively corresponding to the time evolution of the charge quantities Q + , Q ' of positive and negative half-waves of one of the control circuit 16 to the windings 5 output excitation current.
- the control circuit In order now to bring the oscillating movement of the armature 6 in motion, the control circuit first sets the armature position, which corresponds to the count N / 2, as the center of the oscillatory motion. The initial resting position of the armature then corresponds to a count denoted n 0 , which will generally be different from N / 2. At time t 2 in Fig. 3, the control circuit starts to excite the swinging motion.
- ⁇ represents a safety distance of a few meter steps, which serves to reliably avoid a collision of the piston at a boundary in stationary operation.
- a typical sequence of the armature movement is shown as curve p in the middle diagram of FIG. 3.
- the control circuit 16 initially acts on the windings only with positive half waves to raise the armature.
- the time evolution of the amount of charge Q + of the upper half-waves is shown in the upper diagram of Fig. 3; it starts with an initial value Q + (t 2 ) at time t 2 , which is proportional to the deviation between the armature rest position n 0 and the desired midpoint N / 2 of its swinging motion, and decreases as the target reverse position U + position with time t too.
- the target position of the lower reversal point u ' crosses the rest position n 0 .
- control circuit 16 starts to output negative half-waves.
- the time evolution of their charge quantity Q " is shown in the lower diagram of FIG.
- the charge quantities Q + , Q ' increase until the desired interpretations u + , u ' have reached the end positions N- ⁇ and ⁇ , respectively, and thus the stationary operating state of the linear compressor is reached.
- charge amounts of the positive and negative half-waves are still different in order to compensate for the deviation between the rest position n 0 of the armature 6 and the center position N / 2 of the armature movement influenced by the pressure of the refrigerant in the compression chamber.
- control circuit 16 reduces the charge amount of the positive half-waves when it detects a movement of the armature beyond the upper target turning point N- ⁇ and accordingly increases the amount of charge of the lower half-waves, such a displacement of the movement is avoided, so that the compressor unit works at any time with a minimum dead volume, without it comes to striking the piston 1 1 in the compression chamber 10.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Linear Motors (AREA)
- Compressor (AREA)
- Materials For Medical Uses (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Dental Preparations (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006009230A DE102006009230A1 (de) | 2006-02-28 | 2006-02-28 | Verfahren zum Justieren eines Kolbens in einem Linearverdichter |
PCT/EP2007/050745 WO2007099000A1 (de) | 2006-02-28 | 2007-01-25 | Verfahren zum justieren eines kolbens in einem linearverdichter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1991783A1 true EP1991783A1 (de) | 2008-11-19 |
EP1991783B1 EP1991783B1 (de) | 2010-11-03 |
Family
ID=37909822
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07704139A Not-in-force EP1991783B1 (de) | 2006-02-28 | 2007-01-25 | Verfahren zum justieren eines kolbens in einem linearverdichter |
Country Status (8)
Country | Link |
---|---|
US (1) | US7868566B2 (de) |
EP (1) | EP1991783B1 (de) |
CN (1) | CN101389862B (de) |
AT (1) | ATE487061T1 (de) |
DE (2) | DE102006009230A1 (de) |
ES (1) | ES2354027T3 (de) |
RU (1) | RU2413873C2 (de) |
WO (1) | WO2007099000A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004010403A1 (de) * | 2004-03-03 | 2005-09-22 | BSH Bosch und Siemens Hausgeräte GmbH | Reversierender Linearantrieb mit Mitteln zur Erfassung einer Ankerposition |
BRPI0704947B1 (pt) * | 2007-12-28 | 2018-07-17 | Whirlpool Sa | conjunto de pistão e cilindro acionado por motor linear com sistema de reconhecimento de posição de cilindro e compressor de motor linear |
MX2013012930A (es) * | 2011-05-06 | 2014-05-28 | Electrolux Home Prod Corp | Montaje de bomba reciprocante para liquidos. |
CN103216419B (zh) * | 2013-04-17 | 2015-04-22 | 覃瑞昌 | 直线压缩机 |
US9528505B2 (en) * | 2014-02-10 | 2016-12-27 | Haier Us Appliance Solutions, Inc. | Linear compressor |
US9562525B2 (en) * | 2014-02-10 | 2017-02-07 | Haier Us Appliance Solutions, Inc. | Linear compressor |
CN104533750A (zh) * | 2014-11-04 | 2015-04-22 | 天津探峰科技有限公司 | 线性压缩机 |
CN105262298A (zh) * | 2015-08-25 | 2016-01-20 | 同济大学 | 一种直线电机及具有该直线电机的压缩机 |
CN105332891B (zh) * | 2015-11-19 | 2018-01-16 | 沈阳工业大学 | 直驱式直接磁悬浮直线压缩机 |
CN105515278A (zh) * | 2015-12-10 | 2016-04-20 | 皖西学院 | 一种散热性好的开关磁阻电机 |
CN105464943A (zh) * | 2016-01-22 | 2016-04-06 | 珠海格力节能环保制冷技术研究中心有限公司 | 一种活塞驱动杆、活塞缸组件和压缩机 |
RU174245U1 (ru) * | 2017-06-13 | 2017-10-09 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный технический университет" | Компрессор с линейным приводом |
US20200362842A1 (en) * | 2019-05-15 | 2020-11-19 | Haier Us Appliance Solutions, Inc. | Linear compressor and methods of setpoint control |
CN111089042B (zh) * | 2019-12-04 | 2021-07-09 | 杭州电子科技大学 | 一种采用双线圈结构的动圈式线性压缩机 |
CN112413919B (zh) * | 2020-12-21 | 2022-06-07 | 深圳供电局有限公司 | 一种低温制冷机 |
Family Cites Families (17)
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CH604004A5 (en) * | 1976-03-30 | 1978-08-31 | Robert Troxler | Air compressor for tyre inflation |
US5032772A (en) * | 1989-12-04 | 1991-07-16 | Gully Wilfred J | Motor driver circuit for resonant linear cooler |
CN1083939C (zh) * | 1996-07-09 | 2002-05-01 | 三洋电机株式会社 | 线性压缩机 |
WO1999018649A1 (en) * | 1997-10-04 | 1999-04-15 | Z & D Limited | Linear motor compressor |
KR100480086B1 (ko) * | 1998-01-12 | 2005-06-08 | 엘지전자 주식회사 | 리니어 압축기의 흡입손실 저감구조 |
US6084320A (en) * | 1998-04-20 | 2000-07-04 | Matsushita Refrigeration Company | Structure of linear compressor |
JP3083518B2 (ja) * | 1998-07-03 | 2000-09-04 | 三星電子株式会社 | リニア圧縮機の内側コア及びシリンダブロックの構造並びに結合方法 |
HUP0202283A3 (en) * | 1999-07-30 | 2003-10-28 | Eisai Co Ltd | Process for the preparation of basic antibiotic-inorganic acid addition salts and intermediate oxalates |
FR2801645B1 (fr) * | 1999-11-30 | 2005-09-23 | Matsushita Electric Ind Co Ltd | Dispositif d'entrainement d'un compresseur lineaire, support et ensemble d'informations |
JP2001227461A (ja) * | 2000-02-14 | 2001-08-24 | Matsushita Electric Ind Co Ltd | リニア圧縮機 |
JP4129126B2 (ja) * | 2001-06-26 | 2008-08-06 | 松下電器産業株式会社 | リニア圧縮機の駆動制御方法及び車両用リニア圧縮機の駆動制御方法 |
DE10312234A1 (de) * | 2002-03-20 | 2003-12-18 | Lg Electronics Inc | Betriebssteuervorrichtung und -verfahren für einen Linearkompressor |
JP2003339188A (ja) * | 2002-05-21 | 2003-11-28 | Matsushita Electric Ind Co Ltd | リニアモータの駆動装置 |
JP4745768B2 (ja) * | 2005-05-06 | 2011-08-10 | エルジー エレクトロニクス インコーポレイティド | リニア圧縮機 |
DE102006009271A1 (de) * | 2006-02-28 | 2007-08-30 | BSH Bosch und Siemens Hausgeräte GmbH | Linearantrieb mit reduzierter axialer Kraftkomponente sowie Linearverdichter und Kältegerät |
DE102006009256A1 (de) * | 2006-02-28 | 2007-08-30 | BSH Bosch und Siemens Hausgeräte GmbH | Linearantrieb und Linearverdichter mit anpassbarer Leistung |
DE102006009259A1 (de) * | 2006-02-28 | 2007-08-30 | BSH Bosch und Siemens Hausgeräte GmbH | Verfahren zum prädiktiven Regeln eines Linearantriebs bzw. eines Linearverdichters sowie prädiktiv geregelter Linearantrieb bzw. Linearverdichter |
-
2006
- 2006-02-28 DE DE102006009230A patent/DE102006009230A1/de not_active Withdrawn
-
2007
- 2007-01-25 AT AT07704139T patent/ATE487061T1/de active
- 2007-01-25 ES ES07704139T patent/ES2354027T3/es active Active
- 2007-01-25 DE DE502007005553T patent/DE502007005553D1/de active Active
- 2007-01-25 EP EP07704139A patent/EP1991783B1/de not_active Not-in-force
- 2007-01-25 US US12/224,515 patent/US7868566B2/en not_active Expired - Fee Related
- 2007-01-25 CN CN2007800069113A patent/CN101389862B/zh not_active Expired - Fee Related
- 2007-01-25 RU RU2008138130/06A patent/RU2413873C2/ru not_active IP Right Cessation
- 2007-01-25 WO PCT/EP2007/050745 patent/WO2007099000A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007099000A1 * |
Also Published As
Publication number | Publication date |
---|---|
US7868566B2 (en) | 2011-01-11 |
ES2354027T3 (es) | 2011-03-09 |
DE502007005553D1 (en) | 2010-12-16 |
RU2413873C2 (ru) | 2011-03-10 |
DE102006009230A1 (de) | 2007-08-30 |
RU2008138130A (ru) | 2010-04-10 |
US20090153081A1 (en) | 2009-06-18 |
WO2007099000A1 (de) | 2007-09-07 |
CN101389862B (zh) | 2010-09-08 |
ATE487061T1 (de) | 2010-11-15 |
CN101389862A (zh) | 2009-03-18 |
EP1991783B1 (de) | 2010-11-03 |
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