EP1900942B1 - Membranvakuumpumpe - Google Patents

Membranvakuumpumpe Download PDF

Info

Publication number
EP1900942B1
EP1900942B1 EP07116000A EP07116000A EP1900942B1 EP 1900942 B1 EP1900942 B1 EP 1900942B1 EP 07116000 A EP07116000 A EP 07116000A EP 07116000 A EP07116000 A EP 07116000A EP 1900942 B1 EP1900942 B1 EP 1900942B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
vacuum pump
rolling plate
point
type vacuum
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.)
Not-in-force
Application number
EP07116000A
Other languages
English (en)
French (fr)
Other versions
EP1900942A1 (de
Inventor
Hee-Sung Cho
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.)
Po-S TECH Co Ltd
Lock and Lock Co Ltd
Original Assignee
Po-S TECH Co Ltd
Lock and Lock Co Ltd
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 Po-S TECH Co Ltd, Lock and Lock Co Ltd filed Critical Po-S TECH Co Ltd
Publication of EP1900942A1 publication Critical patent/EP1900942A1/de
Application granted granted Critical
Publication of EP1900942B1 publication Critical patent/EP1900942B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/04—Pumps having electric drive

Definitions

  • the present invention relates to a diaphragm type vacuum pump, and in particular, to the structure of a vacuum pump that is compact in size and can be manufactured at low cost without using lubricant by using a small electric motor and a diaphragm type pump.
  • Vacuum pumps are widely used to reduce the internal pressure of a container and various types of vacuum pumps, depending on the use, have been known in the art.
  • a vacuum pump that is used to reduce the internal pressure of an electric rice cooker to satisfy various conditions, such as, it should be a dry type without lubricant, manufactured to have a compact and small-sized configuration and disposed in a case of the electric rice cooker, and the manufacturing cost is low.
  • a vacuum pump in which a connecting rod is reciprocated by rotation of an eccentric shaft.
  • a diaphragm is actuated by the reciprocation of the connecting rod to repeat intake and exhaust, and a vacuum pump includes a diaphragm that is reciprocated by a vacuum pump to repeat intake and exhaust.
  • a diaphragm type vacuum pump having the structural features as defined in the preamble of claim 1 is known e.g. from DE 3 718 967 A1 .
  • a diaphragm type vacuum pump includes: a pin that is radially spaced from the rotational center of a motor and inclined to the rotational center, a rolling plate that is combined with the pin, a three-point diaphragm that is combined with the rolling plate, and intake and exhaust valves.
  • the rolling plate shakes up and down while being inclined by the inclination angle of the pin, the three-point diaphragm is repeatedly moved up and down by the shaking, and intake and exhaust of air are repeated by changes in the internal volume due to the motion of the three-point diaphragm, thereby forming a vacuum.
  • FIG. 1 is a perspective view of a diaphragm type vacuum pump according to an embodiment of the invention
  • FIG. 2 is an exploded perspective view of FIG. 1
  • FIG. 3A is a perspective view of an air port with guide rings connected according to an embodiment of the invention
  • FIG. 3B is a bottom view of the air port
  • FIG. 3C is a perspective view of the guide ring
  • FIG. 4 is a conceptional view illustrating an intake process a and an exhaust process b in the operation according to an embodiment of the invention.
  • a vacuum pump is formed by sequentially assembling a motor 1, a housing 2, a diaphragm guide 3, an air port 4, a cover 5, screws 6, and bolts 7, and a fixture 8 that is connected to the shaft of the motor 1 is provided in the housing 2.
  • a three-point diaphragm 10 that is combined with a rolling plate 9 is provided in the diaphragm guide 3, and intake valves 11 and guide rings 12 are combined with the air port 4.
  • An inclined pin 13 that is inclined to the rotational center is fixed at a predetermined distance from the rotational center in the fixture 8 connected to the shaft of the motor 1.
  • the inclined pin 13 is inserted in an insertion hole formed at the center of the rolling plate 9 and makes the rolling plate 9 eccentrically shake up and down by turning around the rotational center by rotation of the fixture 8.
  • the three-point diaphragm 10 When the rolling plate 9 is perpendicular to the rotational center, the three-point diaphragm 10 is compressed, and when the rolling plate 9 is inclined from the rotational center, the three-point diaphragm 10 is decompressed.
  • the inside air pushes an exhaust valve 15 through exhaust passages 14 formed at a side of the insertion wall of the guide ring 12 and is then exhausted out of an exhaust port 17 through an exhaust hole 16.
  • the air that flows through an intake port 18 formed at the cover 5 flows along grooves 19 formed on the upper surface of the air port 4 into the three-point diaphragm 10 through the intake valves 11.
  • the three-point diaphragm 10, the intake valves 11, and the exhaust valve 15 are formed of a flexible material, such that they can be easily deformed by external force, and the three-point diaphragm 10 and exhaust valve 15 are integrally formed.
  • the guide ring 12 is fixed in an insert groove 21 formed on the bottom of the air port 4 such that the exhaust passage 14 formed through the insertion wall faces the exhaust hole 16 and contacts the exhaust valve 15 extending from the three-point diaphragm 10 to the outside of the exhaust passage 14. Therefore, the exhaust valve 15 is closed by contacting the exhaust passage 14 in the intake process and pushed by the pressure of air in the exhaust process to exhaust the air.
  • the guide ring 12 prevents the outer wall of the three-point diaphragm 10 from deforming inside by negative pressure in the intake process by strongly pressing the outside of the three-point diaphragm 10 against the wall of the diaphragm guide 3.
  • a boss 20 that contacts to the center of the rolling plate 9 that eccentrically shakes under the diaphragm guide 3 is provided; therefore, it is possible to prevent the rolling plate from being sucked up in the intake process of the three-point diaphragm 10.
  • the present invention provides a vacuum pump equipped with a diaphragm that is manufactured at low cost and effectively operates in a compact size.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Claims (2)

  1. Vakuumpumpe vom Membrantyp, umfassend:
    einen schrägen Stift 13, der in einem vorgegebenen Abstand radial von dem Drehmittelpunkt eines Motors 1 angeordnet ist und sich um den Drehmittelpunkt dreht;
    eine Rollplatte 9, die mit dem schrägen Stift verbunden ist und exzentrisch auf und ab rüttelt; und
    eine Dreipunkt-Membran 10, die mit der Rollplatte kombiniert und zwischen einer Membranführung 3 und einer Luftöffnung 4 angeordnet ist,
    wobei das Vakuumpumpen durch das Wiederholen von Ansaug- und Ausströmvorgängen entsprechend Änderungen des inneren Volumens der Dreipunkt-Membran 10 durchgeführt wird, dadurch gekennzeichnet, dass die Außenseite der Dreipunkt-Membran 10 durch Führungsringe 12, die in die Luftöffnung 4 eingesetzt werden, in engem Kontakt mit der Wand der Membranführung 3 steht.
  2. Vakuumpumpe vom Membrantyp nach Anspruch 1, dadurch gekennzeichnet, dass ein Ansatz 20, der von dem Mittelpunkt der Membranführung 3 vorragt, mit dem Rüttelmittelpunkt der Rollplatte 9 in Kontakt steht.
EP07116000A 2006-09-11 2007-09-10 Membranvakuumpumpe Not-in-force EP1900942B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2006087250 2006-09-11

Publications (2)

Publication Number Publication Date
EP1900942A1 EP1900942A1 (de) 2008-03-19
EP1900942B1 true EP1900942B1 (de) 2009-03-11

Family

ID=38721127

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07116000A Not-in-force EP1900942B1 (de) 2006-09-11 2007-09-10 Membranvakuumpumpe

Country Status (3)

Country Link
EP (1) EP1900942B1 (de)
AT (1) ATE425362T1 (de)
DE (1) DE602007000678D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015113724B4 (de) 2015-08-19 2021-09-30 Kongsberg Automotive Ab Membranpumpe
CN107752751B (zh) * 2016-08-19 2022-02-25 佛山市顺德区美的电热电器制造有限公司 电烹饪装置
CN108324142B (zh) * 2018-05-10 2023-07-25 莱克电气股份有限公司 手动旋转的真空破壁机管架装置
CN110856594B (zh) * 2018-08-24 2021-07-20 佛山市顺德区美的电热电器制造有限公司 烹饪器具以及烹饪器具的烹饪控制方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801249A (en) * 1986-06-09 1989-01-31 Ohken Seiko Co., Ltd. Small-sized pump
JP2761314B2 (ja) * 1991-12-10 1998-06-04 シャープ株式会社 保温釜
US5235903A (en) * 1992-03-17 1993-08-17 Tippmann Eugene R Subatmospheric pressure cook-and-hold steaming oven
JP3200693B2 (ja) * 1992-11-05 2001-08-20 応研精工株式会社 ダイヤフラムポンプ
WO1996028589A1 (en) * 1995-03-16 1996-09-19 Matsushita Electric Industrial Co., Ltd. Gas-permselective pneumatic pump and incubator using the same
JPH11218082A (ja) * 1998-02-02 1999-08-10 Ouken Seiko Kk 減圧ポンプ
EP1308622B1 (de) * 2001-11-06 2013-12-18 Oken Seiko Co., Ltd. Membranpumpe

Also Published As

Publication number Publication date
ATE425362T1 (de) 2009-03-15
EP1900942A1 (de) 2008-03-19
DE602007000678D1 (de) 2009-04-23

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