EP3019748A1 - Linearverdichter für ein haushaltsgerät und haushaltskältegerät - Google Patents
Linearverdichter für ein haushaltsgerät und haushaltskältegerätInfo
- Publication number
- EP3019748A1 EP3019748A1 EP14734096.2A EP14734096A EP3019748A1 EP 3019748 A1 EP3019748 A1 EP 3019748A1 EP 14734096 A EP14734096 A EP 14734096A EP 3019748 A1 EP3019748 A1 EP 3019748A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- linear compressor
- cylinder
- cylinder inner
- piston outer
- appliance
- 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
- 238000005057 refrigeration Methods 0.000 title claims abstract description 15
- 229910000734 martensite Inorganic materials 0.000 claims abstract description 9
- 150000001247 metal acetylides Chemical class 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000012791 sliding layer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod 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
-
- 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
- F04B39/125—Cylinder heads
Definitions
- WO 2008/055810 A1 and WO 2006/089582 A1 each show a linear compressor for a domestic appliance, with one in the longitudinal direction of a cylinder between an upper and lower Pressure point position movable piston, the piston outer surface is to form a gas pressure bearing in the radial direction of the cylinder contactless with respect to a corresponding cylinder inner surface storable.
- the linear compressor shown there are used in respective refrigeration cycles of household appliances.
- gas Due to the refrigeration cycle, gas is sucked from a low-pressure side of the refrigeration circuit by the linear compressor and pumped into a high-pressure side of the refrigeration circuit.
- the gas pressure bearing used in the linear compressor is normally supplied from the high pressure side of the refrigeration cycle to prevent contact between the piston and the cylinder.
- the gas pressure bearing can therefore not be designed accordingly and the piston outer surface has contact with the corresponding cylinder inner surface in the first seconds after the start of the linear compressor.
- WO 2006/069881 A1 likewise shows a linear compressor for a household appliance, with a longitudinal direction of a cylinder between an upper and lower dead center position movable piston, the piston outer surface is to form a gas pressure bearing in the radial direction of the cylinder contactless with respect to a corresponding cylinder inner surface storable.
- the mutually facing side surfaces of the piston and the cylinder are provided with an abrasion-resistant sliding layer.
- this is associated with considerable additional effort and corresponding costs in the production of the linear compressor.
- the linear compressor according to the invention for a domestic appliance comprises a piston which can be moved between an upper and lower dead center position in the longitudinal direction of a cylinder, the piston outer surface of which can be mounted in contact with a corresponding cylinder inner surface in a contactless manner with the formation of a gas pressure bearing in the radial direction of the cylinder.
- the piston outer surface and the cylinder inner surface have a martensitic microstructure at least in a respective predetermined area.
- the piston outer surface and the cylinder inner surface are formed of a martensitic steel at least in the respective predetermined region.
- linear compressor according to the invention in other applications than in household appliances, in particular wherever self-powered gas pressure bearing or dynamic bearings, such as turbines, are used.
- the linear compressor according to the invention can be used in corresponding devices of the aerospace industry and in plants for power generation.
- the piston outer surface and the cylinder inner surface each include a single of the predetermined areas where a contact of the piston outer surface with the cylinder inner surface is possible if no gas pressure bearing is formed or the gas pressure bearing has fallen below a predetermined pressure threshold.
- the respective predetermined areas are formed with the martensitic microstructure only where there is a risk that at an insufficient pressure supply of the linear compressor, a contact of the piston outer surface with the cylinder inner surface is even possible.
- a complex complete machining of the piston outer surface and the cylinder inner surface can be saved, which has a positive effect on the manufacturing costs of the respective components.
- the cylinder comprises a bush, which has the cylinder inner surface.
- the corresponding predetermined range with the martensitic microstructure on the cylinder must also be formed only on the socket, whereby the production of the cylinder can be considerably facilitated because a corresponding surface treatment must be made only on the socket and not on the entire cylinder.
- the respective predetermined areas are formed of a steel with the alloy X15T.N. As a result, a particularly abrasion-resistant and low-wear surface is provided at the respective predetermined areas.
- the microstructures of the respective predetermined regions comprise homogeneously distributed, spherical carbides.
- spherical is to be understood as meaning that the carbides have a substantially spherical shape, that is to say they have a maximum deviation from a theoretically optimum spherical shape in the range of approximately 10 to 15% within the usual manufacturing tolerances.
- a further advantageous embodiment of the invention provides that the carbides have a diameter of 1 to 2 ⁇ .
- the carbides have a diameter of 1 to 2 ⁇ .
- the respective predetermined areas are tempered, surface hardened and / or press-hardened.
- a corresponding cover layer can be formed in the respective predetermined areas, which essentially has no porous surface, whereby the desired wear-resistant and tough layer can be formed on the respective surfaces.
- the corresponding microstructure can be formed in a particularly simple manner by tempering, surface hardening and / or press hardening.
- the domestic refrigerator according to the invention with a refrigeration cycle and a compressor is characterized in that the compressor is designed as the linear compressor according to the invention or as an advantageous embodiment of the linear compressor according to the invention.
- FIG. 1 is a schematic longitudinal sectional view of an embodiment of a household refrigerator with a linear compressor
- FIG. 2 is a side sectional view of the linear compressor having an in
- Longitudinal direction of a cylinder between an upper and lower dead center position movable piston comprises.
- a domestic refrigerator 10 is shown in Fig. 1 in a schematic longitudinal sectional view, which may be a refrigerator, a freezer or a combined refrigerated-freezer.
- the household refrigeration appliance 10 comprises an interior space 12 which is designed to receive food.
- This interior space 12 may be a refrigerated compartment, a freezer compartment or a no-frost compartment or at least two of these compartments.
- the domestic refrigeration appliance 10 comprises a refrigeration cycle 14, which comprises a linear compressor 16.
- the linear compressor 16 is preferably arranged in a machine room 18, which is located in the lower and rear region of the domestic refrigerator 10.
- the linear compressor 16 is thus used in the refrigeration cycle 14, 16 sucked gas from an unspecified low-pressure side of the linear compressor and pumped into an unspecified high-pressure side.
- the linear compressor 16 comprises a piston 24, which is movable in the longitudinal direction 20 of a cylinder 22 between an upper and lower dead center position, whose piston outer surface 26 can be mounted in contact with a corresponding cylinder inner surface 30 without contact in the radial direction 28 of the cylinder 22, forming a gas pressure bearing.
- the cylinder 22 comprises a bushing 32, through which the cylinder inner surface 30 is formed. Via a multiplicity of bores 34 extending through the bush 32, pressurized gas can pass from a cavity 36 into a working chamber 38 and form there the gas pressure bearing in the form of a gas cushion between the piston outer surface 26 and the cylinder inner surface 30 in order to contact them radially in the radial direction 28 to store.
- the piston outer surface 26 and the cylinder inner surface 30 are formed in a respective predetermined region 40, 42 by a martensitic microstructure.
- the predetermined regions 40, 42 are formed where a contact of the piston outer surface 26 with the cylinder inner surface 30 is possible if no gas pressure bearing is formed or the gas pressure bearing has fallen below a predetermined pressure threshold. This is particularly the case when the linear compressor 16 is switched on after a standstill phase, in which case the pressure on the high pressure side and on the low pressure side is normally balanced. In such a case, the gas pressure layer is not yet or not completely formed, ie with a correspondingly required pressure, so that the piston outer surface 26 and the cylinder inner surface 30 can come into contact with one another in the first seconds after the start of the linear compressor 16.
- the predetermined area 40 is formed at those areas of the piston outer surface 26 which are arranged parallel to the cylinder inner surface 30.
- the given area 42 in the present case is the whole Cylinder inner surface 30 of the sleeve 32 is formed.
- the predetermined regions 40, 42 may also be formed only partially on the piston outer surface 26 and on the cylinder inner surface 30.
- the shape of the piston outer surface 26 and / or the cylinder inner surface 30 may be such that they can touch only in certain sections. In such cases, the predetermined regions 40, 42 are also formed only at these points of the cylinder inner surface 30 and on the piston outer surface 26.
- the respective predetermined regions 40, 42 are formed of a steel with the alloy X15T.N.
- the microstructure of the respective predetermined regions 42, 40 comprise homogeneously distributed, spherical carbides.
- the carbides have a diameter of 1 to 2 ⁇ .
- the predetermined regions 40, 42 may be tempered, surface hardened and / or press-hardened in order to form the correspondingly described martensitic microstructure with the spherical carbides.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Compressor (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013213380.4A DE102013213380A1 (de) | 2013-07-09 | 2013-07-09 | Linearverdichter für ein Haushaltsgerät und Haushaltskältegerät |
| PCT/EP2014/063348 WO2015003901A1 (de) | 2013-07-09 | 2014-06-25 | Linearverdichter für ein haushaltsgerät und haushaltskältegerät |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3019748A1 true EP3019748A1 (de) | 2016-05-18 |
| EP3019748B1 EP3019748B1 (de) | 2017-03-29 |
Family
ID=51033192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14734096.2A Not-in-force EP3019748B1 (de) | 2013-07-09 | 2014-06-25 | Linearverdichter für ein haushaltsgerät und haushaltskältegerät |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20160153446A1 (de) |
| EP (1) | EP3019748B1 (de) |
| CN (1) | CN105378281B (de) |
| DE (1) | DE102013213380A1 (de) |
| WO (1) | WO2015003901A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101409B (zh) * | 2017-05-17 | 2018-01-23 | 宁利平 | 双作用α型斯特林制冷机 |
| DE102019104856A1 (de) * | 2019-02-26 | 2020-08-27 | Wabco Gmbh | Kolbenkompressor |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB763492A (en) * | 1954-03-29 | 1956-12-12 | Wellworthy Ltd | Improvements in or relating to cylinder liners |
| US4202710A (en) * | 1978-12-01 | 1980-05-13 | Kabushiki Kaisha Komatsu Seisakusho | Carburization of ferrous alloys |
| GB2235212B (en) * | 1989-07-25 | 1993-08-11 | Nippon Seiko Kk | Rolling bearing |
| JP2003148294A (ja) * | 2001-11-12 | 2003-05-21 | Hitachi Ltd | 燃料ポンプ及び筒内噴射エンジン |
| EP1788264B1 (de) * | 2004-08-02 | 2018-05-16 | NTN Corporation | Wälzlager für schwinge |
| DE102004061940A1 (de) | 2004-12-22 | 2006-07-06 | Aerolas Gmbh, Aerostatische Lager- Lasertechnik | Kolben-Zylinder-Einheit |
| DE102004062303A1 (de) | 2004-12-23 | 2006-07-13 | BSH Bosch und Siemens Hausgeräte GmbH | Linearverdichter |
| US20080000348A1 (en) * | 2004-12-23 | 2008-01-03 | Bsh Bosch Und Siemens Hausgerate Gmbh | Linear Compressor |
| DE102006009274A1 (de) * | 2006-02-28 | 2007-08-30 | BSH Bosch und Siemens Hausgeräte GmbH | Linearverdichter bzw. Kältegerät umfassend eine Abflusseinrichtung für Fluidkondensat |
| DE102006052427A1 (de) * | 2006-11-07 | 2008-05-08 | BSH Bosch und Siemens Hausgeräte GmbH | Gasdrucklager und Lagerbuchse dafür |
| DE102006052447A1 (de) * | 2006-11-07 | 2008-05-08 | BSH Bosch und Siemens Hausgeräte GmbH | Linearverdichter und Gasdrucklager dafür |
| DE102006052450A1 (de) * | 2006-11-07 | 2008-05-08 | BSH Bosch und Siemens Hausgeräte GmbH | Gasdrucklager und Verfahren zu seiner Herstellung |
| DE102007060825A1 (de) * | 2007-12-18 | 2009-06-25 | BSH Bosch und Siemens Hausgeräte GmbH | Linearverdichteraggregat |
| WO2011162713A1 (en) * | 2010-06-24 | 2011-12-29 | Superior Metals Sweden Ab | A metal-base alloy product and methods for producing the same |
| CN201925154U (zh) * | 2010-12-10 | 2011-08-10 | 云南昆钢联合激光技术有限公司 | 一种表面强化活塞杆 |
| US20140013915A1 (en) * | 2011-03-25 | 2014-01-16 | Nisshin Steel Co., Ltd. | Steel plate with excellent durability for band-shaped die-cutting blade, and band-shaped die-cutting blade |
| BRPI1105471A2 (pt) * | 2011-11-16 | 2015-11-10 | Whirlpool Sa | restritor e processo de produção de um restritor de vazão de um fluido para mancais aerostáticos |
| DE102014200981A1 (de) * | 2014-01-21 | 2015-07-23 | BSH Hausgeräte GmbH | Verdichter für einen Kältekreislauf eines Haushaltskältegeräts, Haushaltskältegerät mit einem Verdichter und Verfahren zum Betreiben eines Verdichters eines Haushaltskältegeräts |
-
2013
- 2013-07-09 DE DE102013213380.4A patent/DE102013213380A1/de not_active Withdrawn
-
2014
- 2014-06-25 CN CN201480037835.2A patent/CN105378281B/zh not_active Expired - Fee Related
- 2014-06-25 EP EP14734096.2A patent/EP3019748B1/de not_active Not-in-force
- 2014-06-25 US US14/904,113 patent/US20160153446A1/en not_active Abandoned
- 2014-06-25 WO PCT/EP2014/063348 patent/WO2015003901A1/de not_active Ceased
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2015003901A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015003901A1 (de) | 2015-01-15 |
| CN105378281B (zh) | 2018-01-16 |
| DE102013213380A1 (de) | 2015-01-15 |
| CN105378281A (zh) | 2016-03-02 |
| US20160153446A1 (en) | 2016-06-02 |
| EP3019748B1 (de) | 2017-03-29 |
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