EP2738498A2 - Kühlschrank - Google Patents

Kühlschrank Download PDF

Info

Publication number
EP2738498A2
EP2738498A2 EP13194636.0A EP13194636A EP2738498A2 EP 2738498 A2 EP2738498 A2 EP 2738498A2 EP 13194636 A EP13194636 A EP 13194636A EP 2738498 A2 EP2738498 A2 EP 2738498A2
Authority
EP
European Patent Office
Prior art keywords
air
piston
refrigerator
pump
cavity
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Withdrawn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
EP13194636.0A
Other languages
English (en)
French (fr)
Other versions
EP2738498A3 (de
Inventor
Wentao Diao
Benhe Dou
Jianfeng Zhang
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2738498A2 publication Critical patent/EP2738498A2/de
Publication of EP2738498A3 publication Critical patent/EP2738498A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/042—Air treating means within refrigerated spaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/04—Treating air flowing to refrigeration compartments
    • F25D2317/043—Treating air flowing to refrigeration compartments by creating a vacuum in a storage compartment

Definitions

  • the present invention relates to a refrigerator, and more particularly to a refrigerator having a storage space capable of keeping a low-pressure state.
  • a refrigerator capable of preserving articles in a low-pressure environment is known in the prior art.
  • a refrigerator generally has a storage chamber capable of being evacuated (also referred to as "vacuum chamber” in the industry). By exhausting at least part of air in the storage chamber, air content in the storage chamber is reduced so as to weaken oxidation of food, thereby prolonging preservation time and quality of the food.
  • Chinese Invention Patent CN 101331970 B discloses a vacuum preservation system and a control method thereof, including a low-pressure chamber/vacuum chamber, a vacuum pump and an air exhaust path connected between the vacuum pump and the low-pressure chamber, wherein when the vacuum pump operates, air in the low-pressure chamber can be exhausted through the air exhaust path.
  • a vacuum pump for a refrigerator includes a motor, a cylinder, a crank rod mechanism driven by the motor, and a piston accommodated in the cylinder and driven by the crank rod mechanism to reciprocate in the cylinder.
  • a vacuum pump has a relatively large volume and a high cost.
  • One objective of the present invention is to solve at least one of the above technical problems, thereby providing a refrigerator having a more reliable low-pressure storage system.
  • the refrigerator includes: a storage space capable of keeping a low-pressure state; a vacuum pump, including a pump body for defining a pump cavity, an air inlet communicating with the pump cavity, an air outlet communicating with the pump cavity, a piston accommodated in the pump cavity, and a driving device for driving the piston to move in the pump cavity; and an air exhaust path, connected to the storage space and the air inlet;
  • the refrigerator is characterized in that, the driving device includes a coil, wherein the coil is capable of generating an electromagnetic force for driving the piston to move in the pump cavity, so as to suck air in the storage space into the pump cavity via the air inlet and discharge air out of the pump cavity via the air outlet.
  • the piston is directly driven to move in the pump cavity through an electromagnetic force, and therefore it is unnecessary to use a motor or a transmission mechanism to drive the piston, which helps to greatly reduce the volume and parts of the vacuum pump, so that it can be expected to obtain a small and relatively inexpensive vacuum pump.
  • the coil is fixed to the pump body.
  • the coil is disposed around the pump cavity.
  • the coil is fixed to an end portion of the pump body.
  • the refrigerator includes two groups of coils each fixed to a corresponding end of the pump body.
  • the two groups of coils supply power simultaneously or alternately.
  • the pump body includes a cylinder barrel and an end cover connected to an end portion of the cylinder barrel, and the air inlet and/or the air outlet is located on the end cover
  • the pump body includes a first end and a second end opposite each other, the piston is located between the first end and the second end, and the first end and the second end are each disposed with at least one air inlet and at least one air outlet.
  • the air exhaust path includes a multi-way pipe connected to each of the air inlets, and the multi-way pipe includes a plurality of branches connected in parallel and each connected to each of the air inlets.
  • the pump body includes a first end and a second end opposite each other, the piston is located between the first end and the second end, the first end is disposed with at least one air inlet and at least one air outlet, and the second end is kept in communication with air.
  • the piston includes a magnet.
  • the refrigerator includes a shock attenuation device for buffering a motion of the piston.
  • the shock attenuation device includes a magnet and/or a spring connected to the piston.
  • the refrigerator includes a reset magnet arranged along a middle portion of the pump cavity.
  • a refrigerator 1 has a heat-insulating inner space 10.
  • the inner space 10 may be defined by a cabinet (not shown) having heat-insulating materials, and is closed or opened through a door (not shown) connected to the cabinet.
  • the refrigerator 1 has a storage space 2 capable of keeping a low-pressure state.
  • the storage space 2 may be formed by a storage unit 11 mounted in the inner space 10, and also may be directly defined by the inner space 10.
  • the refrigerator 1 has an air exhaust system 12 for at least partially exhausting air in the storage space 2.
  • the air exhaust system 12 includes a vacuum pump 3 and an air exhaust path 4 connected between the storage space 2 and the vacuum pump 3.
  • the air exhaust path 4 may be defined by at least one pipe and at least one pipe joint.
  • the air exhaust system 12 may include a mechanical valve 8 located in the air exhaust path 4 and for stopping external air from entering the storage space 2.
  • the mechanical valve 8 may be disposed on the storage unit 11.
  • the mechanical valve 8 may have a deformable valve plate, and under the action of a difference between internal and external pressures, the valve plate is deformed and sealed in an air exhaust channel on the storage unit 11.
  • the mechanical valve 8 may adopt the existing scheme, for example, the scheme disclosed in Patent Application No. CN200910028963.1 submitted by the applicant, which is therefore not described more herein.
  • the air exhaust system 12 includes a detection unit 9 for judging whether the storage space 2 has reached a preset pressure.
  • the detection unit 9 may include a pressure sensor for detecting an air pressure.
  • the detection unit 9 is connected to the air exhaust path 4, which judges a pressure in the storage space 2 by detecting a pressure of the air exhaust path 4. In an alternative embodiment, the detection unit 9 also may directly detect the pressure of the storage space 2.
  • the air exhaust system 12 further includes a branch 5 connected with the air exhaust path 4.
  • One end of the branch 5 is in fluid communication with the air exhaust path 4, while the other end is connected with external air, i.e., connected with an atmospheric pressure.
  • the effect of the branch 5 lies in that, after the vacuum pump 3 ends work, the branch 5 is opened so that air flows to the air exhaust path 4 through the branch 5, the pressure in the air exhaust path 4 is equivalent to the atmospheric pressure, and therefore a pressure differential is established on two sides of the mechanical valve 8, and the mechanical valve 8 may be closed, thereby preventing air from entering the storage space 2 from the air exhaust channel.
  • the branch 5 is provided with a solenoid valve 7 for controlling opening or closing of the branch 5.
  • the solenoid valve 7 is connected with a controller 6 through work, and decides whether to open or close the branch according to a signal from the controller 6.
  • FIG. 2 is a schematic structural view of a vacuum pump according to one preferred embodiment of the present invention.
  • the vacuum pump 3 includes a pump body 31 defining a pump cavity 30, at least one air inlet 321, 322, at least one air outlet 331, 332, a piston 36 accommodated in the pump cavity 30, and a driving device for driving the piston 36 to reciprocate in the pump cavity 30.
  • the pump body 31 may include a cylinder barrel 311 and end covers 3121, 3122 connected to end portions of the cylinder barrel 311.
  • two ends of the cylinder barrel 311 are open and are respectively closed by the end covers 3121, 3122 connected to a corresponding end of the cylinder barrel 311, and when two end walls of the vacuum pump 3 are provided with air inlets or air outlets, such a construction is particularly advantageous.
  • the piston 36 is accommodated in the pump cavity 30 and is capable of reciprocating along the pump cavity 30.
  • the pump cavity 30 is partitioned into a first cavity 301 located on one side of the piston 36 and a second cavity 302 located on the other side of the piston 36.
  • a peripheral surface of the piston 36 and an inner wall surface of the pump cavity 30 are preferably sealed therebetween.
  • the piston 36 includes a magnet.
  • the vacuum pump 3 includes an air inlet check valve 323 capable of closing the corresponding air inlet 32.
  • the air exhaust path 4 may include a multi-way pipe (not shown) connected with each of the air inlets 321, 322, and the multi-way pipe includes a plurality of branches connected in parallel and each connected to each of the air inlets 321, 322.
  • the vacuum pump 3 is provided with two air inlets 321, 322, each of the air inlets 321, 322 is located at a corresponding end portion of the pump body 31, and communicates with a corresponding one of the first cavity 301 and the second cavity 302.
  • each of the air inlets 321, 322 is located on the corresponding end covers 3121, 3122.
  • each of the air outlets 321, 322 may be in fluid communication with a corresponding portion of the pump cavity 30, and the other end is in fluid communication with the outside. Air in the pump cavity 30 may be exhausted through the air outlets 331, 332.
  • the vacuum pump 3 includes an air exhaust check valve 333 capable of respectively closing the air outlets 331, 332.
  • the vacuum pump 3 is provided with two air outlets 331, 332, each of the air outlets 331, 332 is located at a corresponding end portion of the pump body 31, and communicates with a corresponding one of the first cavity 301 and the second cavity 302. Similar to the air inlets 321, 322, each of the air outlets 331, 332 is located on the corresponding end covers 3121, 3122.
  • the driving device includes coils 381, 382 for directly driving the piston 36 to move in the pump cavity 30 through an electromagnetic force.
  • the coils 381, 382 are respectively fixed to a first end 315 and a second end 316 of the pump body 31. Arrangement manners (directions) of the coils 381, 382 are exactly the same, and when the two coils 381, 382 are powered with an alternating current at the same time, distributions of magnetic lines of force of the coils 381, 382 located on two sides of the piston 36 are exactly the same.
  • the piston 36 may move to the first end 315, at this time, the first cavity 301 adjacent to the first end 315 is an exhaust stroke, air in the first cavity 301 is exhausted out of the first cavity 301 through the opened air outlet 331, and the air inlet 321 communicating with the first cavity 301 is closed; the second cavity 302 adjacent to the second end 316 is a suction stroke, that is, the air inlet 322 communicating with the second cavity 302 is opened, air can be sucked into the second cavity 302 from the storage space 2 through the opened air inlet 322, and the air outlet 332 keeps closed; when the current is reversed, the magnetic field generated by the coil 381 has a repellent effect on the piston 36, and the magnetic field generated by the coil 382 has an attractive effect on the piston 36,
  • the vacuum pump 3 may include a shock attenuation device fixed to each of the end covers 3121, 3122 and used for buffering the piston 36 to move.
  • the shock attenuation device includes magnets 391, 392 fixed onto each of the end covers 3121, 3122 and with poles opposite to those of the piston 36.
  • the stroke of the piston 36 may not be great. Meanwhile, the repellent effect of the shock attenuation magnets 391, 392 at two sides on the piston 36 may facilitate the piston 36 to be located at a central position of the pump cavity 30 when in the stationary status.
  • a reset magnet 40 is added to a central position of the cylinder barrel 311.
  • poles of the reset magnet 40 are opposite to those of the piston 36, which may avoid a situation where the piston 36 cannot be restored to the central position when in the stationary status.
  • the rest work principles of the embodiment shown in FIG. 3 are identical to those in FIG. 2 , which are not repeated herein.
  • the coils located at two ends of the pump body 31 also may supply power alternately and alternately generate an electromagnetic field having an attractive force on the piston having a magnet.
  • the two coils are supplied with a direct current, so as to easily control magnetic fields generated by the coils.
  • the piston no longer includes a magnet, but is made of iron, and when one of the two coils located in the pump body 31 is powered, the magnetic field generated by the coil generates an attractive force on the piston made of iron, and the piston moves towards the coil; when the coil on the other end is powered, the piston moves towards the other coil on the other end of the pump body, and reciprocate in this way so that the vacuum pump sucks air from the storage space and exhausts the air to the outside.
  • FIG. 4 is a schematic structural view of a vacuum pump 3a according to another preferred embodiment of the present invention.
  • a difference between this embodiment and the embodiments shown in FIG. 2 and FIG. 3 lies in the position of the coil.
  • the coil 38a surrounds the cylinder barrel 311 externally.
  • an electromagnetic field generated by the coil 38a may affect the piston 36 including a magnet.
  • the electromagnetic field generated by the coil 38a makes the piston 36 move to the first end 315, at this time, the first cavity 301 is an exhaust stroke, and the second cavity 302 is a suction stroke; when the current is reversed, the piston 36 may move to the second end 316, at this time, the first cavity 301 is a suction stroke, and the second cavity 302 is an exhaust stroke. Due to the use of the alternating current, a change of the magnetic line of force is 50 Hz/s or 60 Hz/s, therefore the stroke of the piston 36 may not be great, and under the action of the middle reset magnet 40, the piston 36 can be located at a central position when in the stationary status.
  • the shock attenuation magnets 391, 392 fixed on two ends of the pump body 31 also may be cancelled.
  • the shock attenuation device is formed by a magnet, however, in an alternative embodiment, the shock attenuation device 39 also may be formed by a spring connected to the piston 36, for example, a spring disposed in the first cavity and/or the second cavity and connected to the piston 36.
  • the vacuum pump includes two air inlets and two air outlets, however, the present invention should not be limited thereto, and may have other embodiments.
  • the vacuum pump 3b only includes a pair of air inlet 321 and air outlet 331 communicating with the first cavity 301.
  • the second cavity 302 is kept in communication with air, and an air inlet capable of communicating with the storage space 2 is no longer included.
  • the coil 38b capable of being supplied with an alternating current is fixed to the first end 315 having an air inlet 321 and an air outlet 321 at the pump body 31.
  • the vacuum pump 3b may include shock attenuation springs 391b, 392b respectively connected between a corresponding side of the piston 36 and the first end 315 or the second end 316.
  • the embodiment shown in FIG. 6 serves as a variation of the embodiment shown in FIG. 5 , and the coil 38c located at the first end of the pump body 31 is intermittently supplied with a direct current.
  • the coil 38c When the coil 38c is powered, a magnetic field generated by the coil 38c generates an attractive force on the piston 36 including a magnet, so that the piston 36 moves towards the first end, the first cavity 301 is an exhaust stroke, the air inlet 32 is closed, and the air outlet 33 is opened; when the coil 38c is disconnected, the piston 36 moves towards the second end of the pump body 31 under the repellent force of the shock attenuation magnet 391.
  • the repellent force of the shock attenuation magnet 391 on the piston 36 also may act on the piston 36 located at the rightmost end of the pump cavity 30.
  • the docking position of the piston 36 and the stroke of the piston 36 may be determined depending on a joint force of the magnet on the piston 36 and the shock attenuation magnet 391.
  • the refrigerator may further include a reset magnet 40 located at a middle position of the pump body 31.
  • REFERENCE NUMERALS Refrigerator 1 Inner space 10 Storage unit 11 Air exhaust system 12 Storage space 2 Vacuum pump 3, 3a, 3b, 3c Air exhaust path 4 Mechanical valve 8 Detection unit 9 Branch 5 Solenoid valve 7 Controller 6 Pump cavity 30 Pump body 31 Air inlet 321, 322 Air outlet 331, 332 Piston 36 Cylinder barrel 311 End cover 3121, 3122 First cavity 301 Second cavity 302 Air inlet check valve 323 Air exhaust check valve 333 Coil 381, 382, 38a, 38b, 38c First end 315 Second end 316 Shock attenuation magnet 391, 392 Reset magnet 40 Shock attenuation spring 391b, 392b

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)
EP13194636.0A 2012-12-01 2013-11-27 Kühlschrank Withdrawn EP2738498A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012206668982U CN203286843U (zh) 2012-12-01 2012-12-01 冰箱

Publications (2)

Publication Number Publication Date
EP2738498A2 true EP2738498A2 (de) 2014-06-04
EP2738498A3 EP2738498A3 (de) 2017-02-15

Family

ID=49543202

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13194636.0A Withdrawn EP2738498A3 (de) 2012-12-01 2013-11-27 Kühlschrank

Country Status (2)

Country Link
EP (1) EP2738498A3 (de)
CN (1) CN203286843U (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108613471B (zh) * 2016-12-09 2021-05-04 博西华电器（江苏）有限公司 抽气装置以及具有抽气装置的冰箱
CN108613470A (zh) * 2016-12-09 2018-10-02 博西华电器（江苏）有限公司 抽气装置以及具有抽气装置的冰箱

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101331970B (zh) 2007-06-28 2011-04-27 博西华家用电器有限公司 真空保鲜***及其控制方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2109002A (en) * 1936-07-03 1938-02-22 Stanton C Stimmel Refrigerator
EP1338794A1 (de) * 2002-02-26 2003-08-27 Whirlpool Corporation Kolbenpumpe, insbesondere für einen Kühlschrank mit Vakuumisolation
GB2490180B (en) * 2011-04-18 2013-04-17 Hyperspin Ltd Valve assembly and method of pumping a fluid

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101331970B (zh) 2007-06-28 2011-04-27 博西华家用电器有限公司 真空保鲜***及其控制方法

Also Published As

Publication number Publication date
CN203286843U (zh) 2013-11-13
EP2738498A3 (de) 2017-02-15

Similar Documents

Publication Publication Date Title
JP7077097B2 (ja) エアサスペンションシステム、および、カメラ洗浄システム
EP0909896B1 (de) Oszillierender Kompressor
KR102050182B1 (ko) 에어 서스펜션 시스템
KR101955977B1 (ko) 압축기 제어 장치와 방법, 및 이를 포함한 냉장고
KR20100002176U (ko) 고효율 유체펌프
KR102350313B1 (ko) 공기압 드라이브 극저온 냉동기
GB2490180B (en) Valve assembly and method of pumping a fluid
EP2738498A2 (de) Kühlschrank
KR101588686B1 (ko) 복동전자식 펌프
KR102249282B1 (ko) 벨로우즈 펌프 장치
CN110242536A (zh) 双向电磁驱动空气压缩机
CN104454440A (zh) 双气缸变容量线性压缩机
CN109356812B (zh) 一种制冷设备及其压缩机
AU2018290227A1 (en) Hydraulic diaphragm control using a solenoid valve
US20180230992A1 (en) Linear pumping system and methods for controlling the same
TW201522778A (zh) 排液裝置
JP2009500552A (ja) 冷媒圧縮機及び冷媒圧縮機用制御弁
JP3248728B2 (ja) 磁気直接駆動往復動ポンプ装置及び圧力検出方法
WO2005090786A1 (ja) 電磁式ポンプ
JP4206248B2 (ja) 電磁式ポンプ
KR100529944B1 (ko) 리니어 압축기의 오일 급유 장치
KR100529947B1 (ko) 리니어 압축기
JP2005054638A (ja) 電磁式ポンプ
JP2006097592A (ja) 圧縮機
CN116792282A (zh) 电磁控制装置及流体控制***

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20131127

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BSH HAUSGERAETE GMBH

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: F25D 17/04 20060101AFI20170111BHEP

R17P Request for examination filed (corrected)

Effective date: 20170816

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20190207