EP1338794A1 - Kolbenpumpe, insbesondere für einen Kühlschrank mit Vakuumisolation - Google Patents

Kolbenpumpe, insbesondere für einen Kühlschrank mit Vakuumisolation Download PDF

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Publication number
EP1338794A1
EP1338794A1 EP02004225A EP02004225A EP1338794A1 EP 1338794 A1 EP1338794 A1 EP 1338794A1 EP 02004225 A EP02004225 A EP 02004225A EP 02004225 A EP02004225 A EP 02004225A EP 1338794 A1 EP1338794 A1 EP 1338794A1
Authority
EP
European Patent Office
Prior art keywords
reciprocating
valve
motion type
valves
pump
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.)
Withdrawn
Application number
EP02004225A
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English (en)
French (fr)
Inventor
Whirlpool Europe S.r.l. Grittner Gunter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Priority to EP02004225A priority Critical patent/EP1338794A1/de
Publication of EP1338794A1 publication Critical patent/EP1338794A1/de
Withdrawn legal-status Critical Current

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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
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/006—Micropumps
    • 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
    • F04B39/08—Actuation of distribution members
    • 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
    • F04B49/22—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 means of valves
    • F04B49/24—Bypassing
    • 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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means

Definitions

  • the present invention relates to a reciprocating-motion type pump comprising inlet and outlet valves.
  • the present invention refers particularly to vacuum pumps used in vacuum insulated domestic refrigerators, in which a double wall of the appliance is maintained in a vacuum condition for decreasing the overall energy consumption of the appliance.
  • Vacuum pumps have -although built in many different ways- at least one valve for the flow of the gas. These valves can be of different types, but have all the same function: to open a channel where the gas can pass only in certain moments of the working cycle, and to prevent the passage of gas during other phases of the working cycle. Most important characteristics of the valves are leak rates, reliability, cost and energetic loss. Energetic loss happens when fluids pass a valve that creates resistance to the fluid flow, by the amount of energy necessary to activate the valve, and through residual volumes where fluids are compressed/decompressed more than once, thus creating additional losses.
  • the present invention overcomes the above-mentioned problem by an electronically activated element that opens and closes the channel for the gas at the right moment and improves the pump characteristics by reducing both residual pressure difference and residual volume.
  • Such reduction of the residual pressure difference is obtained by an electrical or electronic drive of the valve.
  • the vacuum pump presents valve plates which are substantially flush with the head of the cylinder.
  • the vacuum pump according to the invention is mechanically simple and therefore it has a reduced cost that renders it suitable for the application in domestic appliances, particular domestic refrigerators and freezer.
  • Figure 1 a piston-type pump system is shown, that can either be used as compressor or as vacuum pump.
  • a rotational movement of a crankshaft 1 is translated into a reciprocating movement of a piston 2, moving back and forth in a cylinder 3.
  • the cylinder is closed by a cylinder head plate 4, that closes the working volume of the pump together with the piston 2 and the cylinder 3.
  • the cylinder head plate has two holes 6 and 7, which are the outlet and the inlet of the pump respectively and have also the function of valve seats.
  • a valve plate 10 is moved via a coil 8 that is attached to an electronic circuit 18 generating an electric signal 14 and it can close each hole.
  • the electric signal ( Figure 3) creates in a temporary controlled manner a magnetic field in the coil 8, that reacts on rod 9 made of ferromagnetic material and connected to the valve plate, thus moving such plate 10 to or from the holes 6, 7. In this way, the valve seats 6, 7 can be opened and closed in a controlled manner.
  • Each valve may be provided with a spring M for maintaining the holes 6 and 7 in a closed (or open) condition when the coil 8 or an alternative actuator is not energised.
  • valve plate 10 is shaped (frusto conical) in such a way that its front surface 10a is substantially flush with the surface of the head 4 of the cylinder 3.
  • valve seats 6 and 7 have a frusto conical shape which matches the shape of the valve plate 10.
  • the valve plate 10 closes the holes 6 and 7 in a way that the cylinder head plate 4 creates a flat surface that allows the piston 2, when moved in its upper position with reference to Figures 1 and 2, to substantially touch the cylinder head plate without opening the valve constituted by the valve plate 10 and hole 6, 7.
  • the valve plate 10, acting as a gasket fits perfectly into the hole 6, 7 reducing to a minimum the space between the piston 2 in its upper position and the valve plate 10, thus eliminating the 'residual volume' of the valve combination.
  • an embodiment of the valve has a housing 13 around at least one of the valves, preferably the inlet valve.
  • the housing 13 is connected to a connection tube 12 that allows the easy connection to suction or working tube.
  • the housing 13 is sealed to the cylinder head plate 4, and has a sealed passage 13a for the electric connection of the valve coil 8.
  • low-cost components can be used for the valve, without the need of airtight mechanical devices.
  • the electric signal 14 for controlling the valve is generated by an electronic control unit 18 (in figure 1 it is shown the link of the valve closing the suction hole 7 to the electronic control unit 18, but it is clear that also the valve closing the hole 6 is linked to the same control unit 18).
  • the control unit 18 may use signals taken from various possible sensors 19, 20, 21 to get information about the actual working condition of the pump (e.g. rpm, crankshaft and / or piston position, motor load etc.), or it may control both the valves and the motor 22 which drives the crankshaft of the pump, to assure a perfect synchronisation of the motor and valves.
  • the electric signal to the valves may work only with opening impulses 15 (when valves are kept closed by springs or the like, as in the embodiment shown in figure 2), and/or may use closing impulses 17 (shown in dotted lines in Figure 3) for a faster and more accurate control of the valves, as well.
  • Special current/voltage pulse peaks 16, of which an example is shown in Figure 3 may further improve the control of the valve.
  • the electronic control unit 18 may keep under certain conditions one or more valves open or closed for extended periods (longer than the normal work cycle), in order to reduce temporarily the workload of the motor or to regulate pressure or flow rate.
  • a further embodiment of this invention allows to change the operating mode very easily by electronic commands, for example from vacuum pump mode to compressor mode.
  • the control just changes the timing of the valves relative to the piston position and -movement.
  • Silicon-based valves may use different driving mechanisms as well, like thermal effects, electrostatic forces and other wellknown effects.
  • Another embodiment of the present invention works with piezo-ceramic material to drive the valves.
  • the vacuum pump according to the present invention is particularly useful for application to domestic refrigerators in which vacuum is used for decreasing the energy consumption of the appliance.
  • To maintain vacuum condition in the double wall of the refrigerator cabinet for more than few years is not always possible, especially for refrigerators having liners made of polymeric material.
  • a vacuum pump which can be activated periodically and/or when the pressure inside the double wall is higher than a predetermined value.
  • This solution has not been implemented mainly due to high cost of traditional vacuum pumps which are normally used in laboratories and which have high costs.
  • the vacuum pump according to the invention has been specifically designed for assuring a low cost and, at the same time, high performances in term of degree of vacuum.
  • the suction tube 12 of the pump In order to combine the vacuum pump of the invention and a vacuum insulated refrigerator, it is only necessary to connect the suction tube 12 of the pump to the double wall of the refrigerator or freezer cabinet; moreover the electronic control unit 18 can be linked to the central processing unit of the refrigerator and/or to pressure sensors inside the double wall of the appliance.
  • the vacuum pump according to the invention may be also used in refrigerators having one or more vacuum compartment and/or containers for improving food conservation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP02004225A 2002-02-26 2002-02-26 Kolbenpumpe, insbesondere für einen Kühlschrank mit Vakuumisolation Withdrawn EP1338794A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02004225A EP1338794A1 (de) 2002-02-26 2002-02-26 Kolbenpumpe, insbesondere für einen Kühlschrank mit Vakuumisolation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02004225A EP1338794A1 (de) 2002-02-26 2002-02-26 Kolbenpumpe, insbesondere für einen Kühlschrank mit Vakuumisolation

Publications (1)

Publication Number Publication Date
EP1338794A1 true EP1338794A1 (de) 2003-08-27

Family

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EP02004225A Withdrawn EP1338794A1 (de) 2002-02-26 2002-02-26 Kolbenpumpe, insbesondere für einen Kühlschrank mit Vakuumisolation

Country Status (1)

Country Link
EP (1) EP1338794A1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005093349A1 (en) * 2004-03-22 2005-10-06 Arcelik Anonim Sirketi A cooling device and a method for improving insulation
WO2008000698A2 (en) 2006-06-28 2008-01-03 Dott. Ing. Mario Cozzani S.R.L. Equipment for continuous regulation of the flow rate of reciprocating compressors
DE202010002145U1 (de) * 2010-02-09 2011-09-07 Vacuubrand Gmbh + Co Kg Membranvakuumpumpe
GB2490180A (en) * 2011-04-18 2012-10-24 Hyperspin Ltd Pump with actively driven valves
WO2013097006A1 (en) * 2011-12-26 2013-07-04 Whirlpool S.A. Semi-commanded valve system applied to compressor and method for modulating the capacity of a compressor provided with a semi-commanded valve system
WO2014124507A1 (en) * 2013-02-15 2014-08-21 Whirlpool S.A. Method for actuating valve and system for actuating valve for multi-suction alternative compressor
EP2738498A3 (de) * 2012-12-01 2017-02-15 BSH Hausgeräte GmbH Kühlschrank
DE102016109318A1 (de) * 2016-05-20 2017-11-23 Max Wild Gmbh Kolbenpumpe
RU2656202C2 (ru) * 2014-04-10 2018-05-31 Хэнон Системз Демпфирующее устройство и способ его изготовления
CN110332087A (zh) * 2019-07-09 2019-10-15 华中科技大学 一种双斜盘阀配流式柱塞泵

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57135280A (en) * 1981-02-12 1982-08-20 Kiichi Taga Highly efficient compressor with suction and discharge valve electrically operated
JPS6075782A (ja) * 1983-09-30 1985-04-30 Japan Steel Works Ltd:The 往復動圧縮機の無段階容量調節装置
US4815946A (en) * 1986-09-08 1989-03-28 Gte Valeron Corporation Magnetostrictive pump with reversible valves
US5277032A (en) * 1992-07-17 1994-01-11 Cfc Reclamation And Recycling Service, Inc. Apparatus for recovering and recycling refrigerants
DE19532037C1 (de) * 1995-08-31 1996-12-19 Eberhard Mayer Steuerung einer Pumpe oder eines Verdichters mit extern ansteuerbaren Saug- und Druckventilen, sowie Vorrichtung zum Durchführen dieses Verfahrens
US5630709A (en) * 1996-02-09 1997-05-20 California Institute Of Technology Pump having pistons and valves made of electroactive actuators
US5765379A (en) * 1994-01-19 1998-06-16 Elcold-Tectrade I/S Thermal insulation system of the vacuum type
US5988985A (en) * 1996-04-12 1999-11-23 Hoerbiger Ventilwerke Aktiengesellschaft Method and apparatus for controlling compressor valves in a piston compressor
WO2001035484A1 (en) * 1999-11-12 2001-05-17 The Trustees Of The University Of Pennsylvania Minute electromechanical actuation and fluid control devices and integrated systems based on low temperature co-fired ceramic (ltcc) tape technology

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57135280A (en) * 1981-02-12 1982-08-20 Kiichi Taga Highly efficient compressor with suction and discharge valve electrically operated
JPS6075782A (ja) * 1983-09-30 1985-04-30 Japan Steel Works Ltd:The 往復動圧縮機の無段階容量調節装置
US4815946A (en) * 1986-09-08 1989-03-28 Gte Valeron Corporation Magnetostrictive pump with reversible valves
US5277032A (en) * 1992-07-17 1994-01-11 Cfc Reclamation And Recycling Service, Inc. Apparatus for recovering and recycling refrigerants
US5765379A (en) * 1994-01-19 1998-06-16 Elcold-Tectrade I/S Thermal insulation system of the vacuum type
DE19532037C1 (de) * 1995-08-31 1996-12-19 Eberhard Mayer Steuerung einer Pumpe oder eines Verdichters mit extern ansteuerbaren Saug- und Druckventilen, sowie Vorrichtung zum Durchführen dieses Verfahrens
US5630709A (en) * 1996-02-09 1997-05-20 California Institute Of Technology Pump having pistons and valves made of electroactive actuators
US5988985A (en) * 1996-04-12 1999-11-23 Hoerbiger Ventilwerke Aktiengesellschaft Method and apparatus for controlling compressor valves in a piston compressor
WO2001035484A1 (en) * 1999-11-12 2001-05-17 The Trustees Of The University Of Pennsylvania Minute electromechanical actuation and fluid control devices and integrated systems based on low temperature co-fired ceramic (ltcc) tape technology

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 236 (M - 173) 25 November 1982 (1982-11-25) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 215 (M - 409) 3 September 1985 (1985-09-03) *

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005093349A1 (en) * 2004-03-22 2005-10-06 Arcelik Anonim Sirketi A cooling device and a method for improving insulation
US9611845B2 (en) 2006-06-28 2017-04-04 Dott.Ing. Mario Cozzani S.R.L. Equipment for continuous regulation of the flow rate of reciprocating compressors
WO2008000698A2 (en) 2006-06-28 2008-01-03 Dott. Ing. Mario Cozzani S.R.L. Equipment for continuous regulation of the flow rate of reciprocating compressors
WO2008000698A3 (en) * 2006-06-28 2008-02-14 Dott Ing Mario Cozzani Srl Equipment for continuous regulation of the flow rate of reciprocating compressors
CN101479479B (zh) * 2006-06-28 2011-11-02 工学博士马里奥·科扎尼有限责任公司 用于往复式压缩机的流量的连续调节的装备
DE202010002145U1 (de) * 2010-02-09 2011-09-07 Vacuubrand Gmbh + Co Kg Membranvakuumpumpe
EP2699800A4 (de) * 2011-04-18 2015-06-24 Hyperspin Ltd Fluidpumpe und verfahren zum pumpen eines fluids
GB2490180B (en) * 2011-04-18 2013-04-17 Hyperspin Ltd Valve assembly and method of pumping a fluid
GB2490180A (en) * 2011-04-18 2012-10-24 Hyperspin Ltd Pump with actively driven valves
WO2013097006A1 (en) * 2011-12-26 2013-07-04 Whirlpool S.A. Semi-commanded valve system applied to compressor and method for modulating the capacity of a compressor provided with a semi-commanded valve system
US10174747B2 (en) * 2011-12-26 2019-01-08 Whirlpool S.A. Semi-commanded valve system applied to compressor and method for modulating the capacity of a compressor provided with a semi-commanded valve system
CN104081050A (zh) * 2011-12-26 2014-10-01 惠而浦股份有限公司 适用于压缩机的半命令阀系统和用来调节设置有半命令阀系统的压缩机的容量的方法
US20140377082A1 (en) * 2011-12-26 2014-12-25 Whirlpool S.A. Semi-commanded valve system applied to compressor and method for modulating the capacity of a compressor provided with a semi-commanded valve system
JP2015507120A (ja) * 2011-12-26 2015-03-05 ワールプール・エシ・ア セミコマンド式弁システムを備える往復式圧縮機、および往復式圧縮機の容量を調節する方法
CN104081050B (zh) * 2011-12-26 2017-04-26 惠而浦股份有限公司 包括半命令阀系统的交替式压缩机和用来调节该压缩机的容量的方法
EP2738498A3 (de) * 2012-12-01 2017-02-15 BSH Hausgeräte GmbH Kühlschrank
US20160003233A1 (en) * 2013-02-15 2016-01-07 Whirlpool S.A. Method for actuating valve and system for actuating valve for multi-suction alternative compressor
CN105051365A (zh) * 2013-02-15 2015-11-11 惠而浦股份有限公司 用于致动阀的方法和用于致动用于多吸入交替型压缩机的阀的系统
CN105051365B (zh) * 2013-02-15 2017-05-24 惠而浦股份有限公司 一种用于致动交替型压缩机的半受控阀的方法及其系统
US20180274530A1 (en) * 2013-02-15 2018-09-27 Whirlpool S.A. Method for Actuating Semi-Commanded Valve and System for Actuating Semi-Commanded Valve for Multi-Suction Alternative Compressor
WO2014124507A1 (en) * 2013-02-15 2014-08-21 Whirlpool S.A. Method for actuating valve and system for actuating valve for multi-suction alternative compressor
US10731642B2 (en) * 2013-02-15 2020-08-04 Embraco—Industria De Compressores E Solucoes Em Refrigeracao Ltda. Method for actuating semi-commanded valve and system for actuating semi-commanded valve for multi-suction alternative compressor
US10774827B2 (en) * 2013-02-15 2020-09-15 Embraco Industria de Compressores e Solucoes em Refrigeracao Ltda. Method for actuating semi-commanded valve and system for actuating semi-commanded valve for multi-suction alternative compressor
RU2656202C2 (ru) * 2014-04-10 2018-05-31 Хэнон Системз Демпфирующее устройство и способ его изготовления
RU2677410C1 (ru) * 2014-04-10 2019-01-16 Хэнон Системз Демпфирующее устройство и способ его изготовления
DE102016109318A1 (de) * 2016-05-20 2017-11-23 Max Wild Gmbh Kolbenpumpe
CN110332087A (zh) * 2019-07-09 2019-10-15 华中科技大学 一种双斜盘阀配流式柱塞泵
CN110332087B (zh) * 2019-07-09 2024-03-19 华中科技大学 一种双斜盘阀配流式柱塞泵

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