EP2225464A1 - Linearverdichteraggregat - Google Patents
LinearverdichteraggregatInfo
- Publication number
- EP2225464A1 EP2225464A1 EP08861723A EP08861723A EP2225464A1 EP 2225464 A1 EP2225464 A1 EP 2225464A1 EP 08861723 A EP08861723 A EP 08861723A EP 08861723 A EP08861723 A EP 08861723A EP 2225464 A1 EP2225464 A1 EP 2225464A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- capsule
- linear compressor
- unit according
- chamber
- compressor unit
- 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
- 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
- F04B39/123—Fluid connections
-
- 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
-
- 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
- F04B39/127—Mounting of a cylinder block in a casing
Definitions
- the present invention relates to a compressor unit, in particular a linear compressor unit, which is suitable for compressing refrigerant in a refrigeration device.
- a compressor for a refrigerator represents a main energy consumer within the refrigerator, so it is desirable that the compressor achieves the highest possible efficiency.
- An important factor limiting the efficiency is energy losses that occur during the suction of the low-pressure refrigerant into the compressor.
- the power loss occurring in this case is proportional to ⁇ p dV / dt, where ⁇ p denotes the pressure drop at the inlet of the compressor and dV / dt the volume flow rate.
- a pressure drop at the compressor outlet is hardly significant due to the significantly lower volume throughput at the outlet.
- Another important cause of losses is a heating of the refrigerant before compression, because the heating reduces the mass of the refrigerant drawn in each cycle of the compressor.
- Such heating may occur, in particular, in the case of encapsulated compressors, such as, for example, from US Pat. No. 5,358,386 A1.
- the compressor is suspended in a capsule and sucks in refrigerant from the surrounding capsule. The longer the refrigerant stays in the capsule before it is aspirated, the more waste heat the compressor absorbs.
- a linear compressor unit according to the preamble of claim 1 is known from US Pat. No. 6,328,544 B1.
- a suction port of the compressor suspended in a capsule directly faces an inlet port of the capsule. This is to minimize the path of the refrigerant from the inlet port to the compressor, so that the refrigerant has little time to heat up in the capsule. Since the compressor oscillates during operation, the inlet connection and the suction connection are not constantly facing each other, so that the compressor also draws in warm refrigerant from the capsule during part of its movement. In addition, the movement of the compressor causes a mixing of freshly sucked in and already in the capsule located refrigerant.
- the object of the present invention is to provide a further optimized in terms of efficiency linear compressor unit.
- the object is achieved by limiting a pre-compression chamber of a first of the movable elements and a capsule-fixed element in a linear compressor unit comprising a capsule and a main compressor mounted in the capsule, which comprises a main compressor chamber delimited by two linearly oscillating elements.
- the oscillating movements of the moving elements cause vibration of the main compressor within the capsule. Since one of the movable elements together with a fixedly arranged on the capsule element forms the Vorverêtrhunt, the vibration of the main compressor against an inner wall of the capsule can be exploited to compress the refrigerant before it enters the main compressor.
- the associated reduction in volume reduces the losses ⁇ p dV / dt associated with the pressure drop at the inlet of the compressor. In addition, it dampens the vibration of the main compressor with respect to the capsule, which is a major cause of the operating noise of the compressor.
- Unnecessary pressure loss for the refrigerant flowing into the supercharger chamber can be avoided by not closing the precompressor chamber on the suction side by a valve.
- constructive advantages can be achieved by reducing the number of components.
- Vorverêtrsch communicates with a surrounding the movable elements of the interior of the capsule via a gap. So can a non-contact sliding of the precompression chamber forming components achieved and a noise minimization in the operation of the compressor can be effected. In addition, it is avoided that refrigerant leaking from the main compressor accumulates in the capsule.
- the gap is substantially closed when the booster chamber is in a first dead center configuration, and is open when the booster chamber is in a second dead center configuration.
- the first dead center configuration may be set, for example, at one end of an expansion phase of the main compressor chamber or a compression phase of the booster chamber
- the second dead center configuration may be at the beginning of the expansion phase of the main compressor chamber or the compression phase of the booster chamber.
- this effect can be enhanced by increasing the size of the gap with proximity to the second dead center configuration.
- At least one of the elements delimiting the precompression chamber has a circumferential surface diverging in the oscillation direction.
- 1 shows a schematic section through a linear compressor unit according to the invention
- 2 shows a schematic section through a pre-compression chamber in a first embodiment of the invention
- FIG. 3 shows a schematic section through the pre-compression chamber in a second embodiment of the invention
- FIG. 4 shows a schematic section through the pre-compression chamber in a third embodiment of the invention.
- Fig. 5 is a schematic section through the Vorverêtrhunt in a fourth embodiment of the invention.
- FIG. 1 is a schematic partial section through an inventive linear compressor unit is shown.
- a capsule 1 surrounds - hermetically except for a suction connection 19 and a pressure connection not shown in FIG. 1 - a linear compressor, of which essentially a cylinder 10 and a piston 21 which is movable in the cylinder 10 can be seen.
- a not shown drive unit of the linear compressor comprises in a conventional manner a connected via a piston rod 16 to the piston 21 permanent magnetic armature, which is suspended vibratable in an air gap of an electromagnet in the direction of the piston rod 16 and exposed to an oscillating magnetic field.
- the entire linear compressor, with drive unit, cylinder 10 and piston 21, in turn, is swingably suspended in the capsule. This has the consequence that when the piston 21 is driven by the drive unit to vibrate, the piston 21 and the cylinder 10 perform opposite movements.
- the cylinder has a tubular jacket 20 and an end wall of the shell 20 closing a suction passage 24 extends axially through the end wall 22.
- a check valve 25 is arranged at its in one of cylinder 10 and piston 21 limited main compressor chamber 23 opening end , which allows a flow of refrigerant only from the suction passage 24 into the main compressor chamber 23.
- the shell 20 and the end wall 22 are hollow, a limited cavity 30 communicates with the main compressor chamber 23 via a check valve 26, which allows a flow of refrigerant only from the main compressor chamber 23 into the cavity 30, and a plurality of on the inside of the shell 20 distributed holes 29th
- the suction passage 24 extends through a projecting from the end wall 22 to the suction port 19 of the capsule 1 out projection 31 which engages in a fixedly connected to the capsule 1 pipe section 32 axially displaceable.
- the projection 31 and the pipe section 32 define a booster chamber 33.
- a common axis of symmetry 34 of the primary and the main compressor chambers 33, 23 extends along the suction port 19 and the suction passage 24.
- the booster chamber 33 is not closed to the suction port 19 by a check valve.
- the compression taking place in the booster chamber 33 dampens the vibration of the compressor. Since both compression chambers 23, 33 have the same axis of symmetry 34, the forces occurring in the two chambers lie on a same line, and there are no torques that stimulate a rolling movement of the compressor and could lead to frictional contact of the mutually movable parts of the two chambers.
- FIGS. 2 to 5 show various embodiments of the invention, each of the figures showing an enlarged section through the pre-compression chamber 33 along the axis of symmetry 34.
- FIG. 2 is an enlarged view of the pre-compression chamber 33 of FIG. 1.
- the pipe section 32 has a constant diameter along the axis 34, as well as the protrusion 31 acting as a piston.
- the diameter of the protrusion 31 is slightly smaller than that of the pipe section 32 so that they do not touch each other in the course of their movement.
- a part of the refrigerant sucked in via the suction port 19 may pass through a gap 35 between the
- FIG. 2 shows the projection 31 in a bottom dead center position with maximum volume of the booster chamber 33 and as a dashed outline 31 'an upper dead center position of the projection 31 with a minimum volume of the booster chamber 33.
- the range of motion of the projection 31 relative to the pipe section 32 is set so that both never completely disengage. If the projection 31 could completely disengage from the pipe section 31, then a
- FIG. 3 An improved embodiment in this respect is shown in Fig. 3.
- an end of the projection 31 facing the suction port 19 is convexly curved, and the pipe portion 32 is convexly curved around the suction port to be complementary thereto.
- the curved end face of the projection 31 ensures that it reliably engages again in the pipe section 32.
- it is not even necessary to make the freedom of movement of the projection 31 so large because if at the bottom dead center of the curved portion of the projection 31 as shown in Fig. 3 at the level of the open end of the pipe section 32, the gap 35 is so wide in that it prevents the influx of refrigerant from the interior 18 into the pre-compression chamber
- the suction port 19 facing the end of the projection 31 has the shape of a truncated cone, wherein the small base of the truncated cone in the direction of the suction port 19 and the inner wall of the pipe section 32 has a diametrically opposed recess to the projection 31st take.
- An axis of the truncated cone coincides with the axis of symmetry
- a circumference of a lateral surface 36 of the Projection 31 diverges in the direction of the oscillatory movements of the compressor, wherein the smallest circumference of the projection 31 is reached at the blunt conical tip.
- This embodiment also allows a large range of movement of the projection 31 with respect to the pipe section 32.
- the sealing effect of the gap 35 is not as effective in the vicinity of the top dead center of the projection 31 at the end of the compression phase indicated by the dashed outline 31 'as in the embodiments Fig. 2 and Fig. 3.
- Diameter is continued, so that the lateral surface 36 has a gradation.
- Recess in the inner wall of the pipe section 32 also has in the region of the largest recess a section with a constant diameter, wherein the
- Inner wall of the gradation on the projection 31 has the same shape.
- the tube section 32 facing the interior 18 of the capsule 1 is firmly connected to the capsule 1, while the projection 31 acting as a piston is movable relative to the tube section 32 and thus relative to the capsule 1.
- projection 31 and pipe section 32 may also be reversed, in which case the end of the suction port 19 connected to the capsule 1 carries the projection 31, which protrudes into the interior 18, and that the suction port 19 facing end of the suction passage 24 carries the pipe section 32 which is movable against the projection 31 and thus against the capsule 1.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710060825 DE102007060825A1 (de) | 2007-12-18 | 2007-12-18 | Linearverdichteraggregat |
| PCT/EP2008/067111 WO2009077384A1 (de) | 2007-12-18 | 2008-12-09 | Linearverdichteraggregat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2225464A1 true EP2225464A1 (de) | 2010-09-08 |
| EP2225464B1 EP2225464B1 (de) | 2013-01-09 |
Family
ID=40429909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08861723A Not-in-force EP2225464B1 (de) | 2007-12-18 | 2008-12-09 | Linearverdichteraggregat |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2225464B1 (de) |
| CN (1) | CN101903656B (de) |
| DE (1) | DE102007060825A1 (de) |
| WO (1) | WO2009077384A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013213380A1 (de) * | 2013-07-09 | 2015-01-15 | BSH Bosch und Siemens Hausgeräte GmbH | Linearverdichter für ein Haushaltsgerät und Haushaltskältegerät |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH324505A (de) * | 1952-11-24 | 1957-09-30 | Heinrich Dipl Ing Doelz | Kolbenverdichter für Klein-Kältemaschinen |
| DE1136445B (de) * | 1957-02-18 | 1962-09-13 | Licentia Gmbh | Gekapselter elektromagnetischer Schwingverdichter |
| US4416594A (en) * | 1979-08-17 | 1983-11-22 | Sawafuji Electric Company, Ltd. | Horizontal type vibrating compressor |
| JPH0674154A (ja) | 1992-08-26 | 1994-03-15 | Matsushita Refrig Co Ltd | 密閉型圧縮機 |
| EP0784753B1 (de) * | 1995-08-21 | 2000-11-29 | Lg Electronics Inc. | Axiales strömungsventilsystem in kombination mit einem linearen kompressor |
| JP2000161212A (ja) | 1998-11-19 | 2000-06-13 | Matsushita Electric Ind Co Ltd | リニア圧縮機 |
| WO2002025111A1 (en) * | 2000-09-25 | 2002-03-28 | Empresa Brasileira De Compressores S.A. - Embraco | Reciprocating compressor driven by a linear motor |
-
2007
- 2007-12-18 DE DE200710060825 patent/DE102007060825A1/de not_active Withdrawn
-
2008
- 2008-12-09 WO PCT/EP2008/067111 patent/WO2009077384A1/de not_active Ceased
- 2008-12-09 CN CN200880121522.XA patent/CN101903656B/zh not_active Expired - Fee Related
- 2008-12-09 EP EP08861723A patent/EP2225464B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009077384A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009077384A1 (de) | 2009-06-25 |
| CN101903656B (zh) | 2013-03-13 |
| EP2225464B1 (de) | 2013-01-09 |
| CN101903656A (zh) | 2010-12-01 |
| DE102007060825A1 (de) | 2009-06-25 |
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