US20100119360A1 - Heatable part of a pump housing - Google Patents

Heatable part of a pump housing Download PDF

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Publication number
US20100119360A1
US20100119360A1 US12/617,186 US61718609A US2010119360A1 US 20100119360 A1 US20100119360 A1 US 20100119360A1 US 61718609 A US61718609 A US 61718609A US 2010119360 A1 US2010119360 A1 US 2010119360A1
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US
United States
Prior art keywords
housing part
pump housing
heating element
tubular heating
part according
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.)
Abandoned
Application number
US12/617,186
Inventor
Daniel Bredl
Ulrich Schlachter
Christian Spiegel
Armin Lang
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.)
Eichenauer Heizelemente GmbH and Co KG
Original Assignee
Eichenauer Heizelemente GmbH and Co KG
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40365773&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20100119360(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Eichenauer Heizelemente GmbH and Co KG filed Critical Eichenauer Heizelemente GmbH and Co KG
Assigned to EICHENAUER HELZELEMENTE GMBH & CO. KG reassignment EICHENAUER HELZELEMENTE GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BREDL, DANIEL, LANG, ARMIN, SCHLACHTER, ULRICH, SPIEGEL, CHRISTIAN
Publication of US20100119360A1 publication Critical patent/US20100119360A1/en
Abandoned 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • This invention refers to a heatable part of a pump housing on which a heat distribution sheet is fixed on which a tubular heating element is arranged.
  • a pump housing part is known from DE 199 03 951 A1.
  • Heatable pump housing parts are, for example, required for washing machines or dishwashers.
  • the pump housing known from DE 199 03 951 A1 has an aluminium heat distribution sheet fixed on a flat or conical cover surface.
  • the heat distribution sheet distributes the heat generated from a tubular heating element, which is soldered onto the plate, quickly over a large area and transmits it to the stainless steel housing part situated below it.
  • EP 1 507 914 B1 discloses another pump housing part.
  • a tubular heating element is arranged in a suitably shaped groove of the housing part.
  • joints and any free spaces between the tubular heating element and the walls and bottom of the groove are filled with a heat-conducting filler material.
  • filler material bonding agents or solders are mentioned.
  • a constant goal in the development of heatable pump housing parts for washing machines or dishwashers has always been to achieve with as little costs as possible a heat coupling as ideal and reliable as possible between the tubular heating element and the pump housing.
  • the better the heat coupling the faster is the rate, with which the heat generated by the tubular heating element is transmitted to the pump housing and from there to the fluid flowing through the pump housing.
  • the reliability of the coupling is at least as important as a good heat coupling of the tubular heating element. If the heat coupling deteriorates during the operation, the heat generated by the tubular heating element cannot be dissipated properly; as a result, the tubular heating element gets overheated.
  • a pump housing part according to this invention has a groove or step, which is covered by the heat distribution sheet.
  • the tubular heating element is fixed in this groove or step, its area of contact with the heat distribution sheet increases, which subsequently improves the dissipation of heat.
  • the tubular heating element of a housing part preferably has a more or less angular cross-section.
  • the tubular heating element can have an approximately rectangular, trapezoidal or triangular cross-section.
  • the lower side of the tubular heating element i.e. the side facing the pump housing, encases an angle less than 90°, particularly 60° to 80°, with an adjacent side.
  • a rounded tubular heating element can be fixed in an groove having a round bottom, e.g. in a groove with a semi-circular cross-section.
  • the heat distribution sheet extends on both the sides of the groove or step, so that the heat generated by the tubular heating element is spread quickly over a maximum possible area of the housing part.
  • the tubular heating element is arranged in a groove of the housing part that is covered by the heat distribution sheet.
  • This offers the advantage that an even larger area of contact can be created between the tubular heating element and the heat distribution sheet, as compared to the arrangement of the tubular heating element in a step, because a groove with a trapezoidal or rectangular cross-section is formed by two steps; and this enables the heat distribution sheet to touch the tubular heating element on three side faces.
  • FIG. 1 shows an embodiment of a pump housing part of this invention
  • FIG. 2 shows a sectional view of FIG. 1 ;
  • FIG. 3 shows a sectional view of another embodiment
  • FIG. 4 shows a sectional view of another embodiment
  • FIG. 5 shows a sectional view of another embodiment.
  • the pump housing part 1 shown in FIGS. 1 and 2 is a cap.
  • the housing part 1 has a base body made of stainless steel 2 forming a connecting tube 3 .
  • the pump housing part 1 can be heated with a U- or C-shaped tubular heating element 4 , which is soldered onto a heat distribution sheet 5 that spreads over a cover surface of the housing part and is soldered with it.
  • the heat distribution sheet 5 covers a U- or C-shaped groove in the housing part.
  • the groove can have an angular cross-section, particularly rectangular or trapezoidal, or a U-shaped cross-section.
  • the tubular heating element 4 is arranged in this groove, such that it touches both the side walls of the groove.
  • the heat distribution sheet 5 projects by more than 0.5 cm beyond the side walls of the groove.
  • An advantage of this is that a larger area of contact is created between the tubular heating element 4 and the heat distribution sheet 5 .
  • the heat distribution sheet primarily covers substantially the whole upper side of the housing part, especially at least 70% of this area. A part of the upper side, i.e. the part between the ends of the tubular heating element 4 , may remain uncovered since no heat is generated in this area.
  • the heat distribution sheet 5 has securing straps 6 .
  • the plate encompasses the tubular heating element 4 with the help of these straps.
  • the securing straps 6 are cut out from the heat distribution sheet 5 and bent upwards.
  • FIG. 3 shows another embodiment of a heatable pump housing part, which mainly differs from the embodiment shown in FIG. 2 only in that the groove does not have a uniform depth and hence, the tubular heating element 4 is tilted against the cover surface plane.
  • This has the advantage that the heat exchanger surface is the largest where the tubular heating element 4 is heated the most.
  • the tubular heating element is hotter in the centre areas than at the ends.
  • FIG. 4 shows another embodiment, which mainly differs from the aforementioned embodiment only in that the tubular heating element 4 , is fixed in a step. This also increases the area of contact between the tubular heating element 4 and the heat distribution sheet 5 , since the tubular heating element 4 is in contact with two surfaces of the heat distribution sheet 5 that run transverse to one another.
  • the tubular heating element 4 has an approximately trapezoidal cross-section and its footprint faces the heat distribution sheet 5 .
  • a tubular heating element 4 can also be arranged in a reverse orientation in the groove, i.e. with its footprint facing away from the bottom of the groove. In the latter case, the walls of the groove or the two steps, which form the groove, are arranged aslant to one another.
  • the tubular heating element 4 carries a support plate 7 , as shown in FIGS. 1 and 5 , for fixing a safety switch.
  • the support plate 7 is preferably made of aluminium or of a good heat-conducting aluminium alloy and enables a heat coupling between the tubular heating element 4 and a thermostatic protective switch or a thermostat, with which the tubular heating element 4 can be cut off when heated beyond a rated operating temperature.
  • Safety switches which feature a switching operation through the snapping of a bimetallic element, are particularly suitable.
  • the heat distribution sheet 5 has a thickness of 1 mm to 1.5 mm. In the embodiment displayed, the thickness of this plate is 1.2 mm.
  • the heat distribution sheet 5 is inductively soldered with the base body 2 and the tubular heating element 4 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The description relates to a heatable pump housing part comprising a heat distribution sheet fixed on the housing part and a tubular heating element fixed on the heat distribution sheet. According to the invention the tubular heating element is positioned in a groove or a step on the housing part that is covered by the heat distribution sheet.

Description

  • This invention refers to a heatable part of a pump housing on which a heat distribution sheet is fixed on which a tubular heating element is arranged. Such a pump housing part is known from DE 199 03 951 A1. Heatable pump housing parts are, for example, required for washing machines or dishwashers.
  • The pump housing known from DE 199 03 951 A1 has an aluminium heat distribution sheet fixed on a flat or conical cover surface. The heat distribution sheet distributes the heat generated from a tubular heating element, which is soldered onto the plate, quickly over a large area and transmits it to the stainless steel housing part situated below it.
  • Furthermore, EP 1 507 914 B1 discloses another pump housing part. A tubular heating element is arranged in a suitably shaped groove of the housing part. To facilitate a good heat coupling between the tubular heating element and the housing part, joints and any free spaces between the tubular heating element and the walls and bottom of the groove are filled with a heat-conducting filler material. As examples for such filler material, bonding agents or solders are mentioned.
  • The arrangement of a tubular heating element in a groove of a heatable pump housing part is also known from EP 1 201 933 B1, which discloses a cylinder- or ring-shaped stainless steel housing part that connects the cap and the bottom of a pump housing, and is positioned in a groove of a lateral surface area.
  • A constant goal in the development of heatable pump housing parts for washing machines or dishwashers has always been to achieve with as little costs as possible a heat coupling as ideal and reliable as possible between the tubular heating element and the pump housing. The better the heat coupling, the faster is the rate, with which the heat generated by the tubular heating element is transmitted to the pump housing and from there to the fluid flowing through the pump housing. Moreover, with a better heat coupling one can reduce the operating temperature of the tubular heating element further. Lower operating temperatures of the tubular heating element help reduce the free spaces between this element and other components in the washing machine or dishwasher and particularly allow the use of more economical plastics in the vicinity of the tubular heating element, since these have to withstand less high temperatures.
  • The reliability of the coupling is at least as important as a good heat coupling of the tubular heating element. If the heat coupling deteriorates during the operation, the heat generated by the tubular heating element cannot be dissipated properly; as a result, the tubular heating element gets overheated.
  • An object of the present invention is to show a way, in which the heat coupling between the tubular heating element and the pump housing can be improved in a reliable manner at minimum costs.
    • SUMMARY OF THE INVENTION
  • A pump housing part according to this invention has a groove or step, which is covered by the heat distribution sheet. When the tubular heating element is fixed in this groove or step, its area of contact with the heat distribution sheet increases, which subsequently improves the dissipation of heat.
  • It is generally known that the process of soldering a tubular heating element to a heat distribution sheet and the heat distribution sheet to a steel body causes relative movements between the tubular heating element and the heat distribution sheet as well as between the heat distribution sheet and the steel body due to the heating in a soldering furnace; these movements are unproblematic only in case of soldered joints on plane surfaces. Nonetheless it is possible to avoid reliably that the heat distribution sheet rises up from the underlying housing part or the tubular heating element rises up from the heat distribution sheet in critical areas like at the edge of a step or the bottom of a groove during the soldering process for manufacturing a pump housing part according to the present invention. For example, this can be avoided by inductive soldering. Another way of ensuring a large contact area and a proper fastening of the tubular heating element in the step or groove in a reliable manner is to cut out securing straps from the heat distribution sheet and bend them upwards. Such securing straps will encompass the tubular heating element and give additional hold.
  • To establish a large-surface contact between the tubular heating element and the heat distribution sheet in a reliable manner, the tubular heating element of a housing part according to this invention preferably has a more or less angular cross-section. For example, the tubular heating element can have an approximately rectangular, trapezoidal or triangular cross-section. In that case, it is preferred if the lower side of the tubular heating element, i.e. the side facing the pump housing, encases an angle less than 90°, particularly 60° to 80°, with an adjacent side. Thus, an enlarged contact area can be created easily and reliably between the tubular heating element and the heat distribution sheet. As another option, a rounded tubular heating element can be fixed in an groove having a round bottom, e.g. in a groove with a semi-circular cross-section.
  • Preferably, the heat distribution sheet extends on both the sides of the groove or step, so that the heat generated by the tubular heating element is spread quickly over a maximum possible area of the housing part.
  • Preferably, the tubular heating element is arranged in a groove of the housing part that is covered by the heat distribution sheet. This offers the advantage that an even larger area of contact can be created between the tubular heating element and the heat distribution sheet, as compared to the arrangement of the tubular heating element in a step, because a groove with a trapezoidal or rectangular cross-section is formed by two steps; and this enables the heat distribution sheet to touch the tubular heating element on three side faces.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Further details and advantages of the invention are explained with the help of embodiments with reference to the drawings attached herewith. In the figures:
  • FIG. 1 shows an embodiment of a pump housing part of this invention;
  • FIG. 2 shows a sectional view of FIG. 1;
  • FIG. 3 shows a sectional view of another embodiment;
  • FIG. 4 shows a sectional view of another embodiment; and
  • FIG. 5 shows a sectional view of another embodiment.
    •  DETAILED DESCRIPTION
  • The pump housing part 1 shown in FIGS. 1 and 2 is a cap. The housing part 1 has a base body made of stainless steel 2 forming a connecting tube 3. The pump housing part 1 can be heated with a U- or C-shaped tubular heating element 4, which is soldered onto a heat distribution sheet 5 that spreads over a cover surface of the housing part and is soldered with it.
  • As shown in the sectional view of FIG. 2, the heat distribution sheet 5 covers a U- or C-shaped groove in the housing part. The groove can have an angular cross-section, particularly rectangular or trapezoidal, or a U-shaped cross-section. The tubular heating element 4 is arranged in this groove, such that it touches both the side walls of the groove. On both the sides, the heat distribution sheet 5 projects by more than 0.5 cm beyond the side walls of the groove. An advantage of this is that a larger area of contact is created between the tubular heating element 4 and the heat distribution sheet 5. It is preferred that the heat distribution sheet primarily covers substantially the whole upper side of the housing part, especially at least 70% of this area. A part of the upper side, i.e. the part between the ends of the tubular heating element 4, may remain uncovered since no heat is generated in this area.
  • The heat distribution sheet 5 has securing straps 6. The plate encompasses the tubular heating element 4 with the help of these straps. The securing straps 6 are cut out from the heat distribution sheet 5 and bent upwards.
  • FIG. 3 shows another embodiment of a heatable pump housing part, which mainly differs from the embodiment shown in FIG. 2 only in that the groove does not have a uniform depth and hence, the tubular heating element 4 is tilted against the cover surface plane. This has the advantage that the heat exchanger surface is the largest where the tubular heating element 4 is heated the most. Generally, the tubular heating element is hotter in the centre areas than at the ends.
  • FIG. 4 shows another embodiment, which mainly differs from the aforementioned embodiment only in that the tubular heating element 4, is fixed in a step. This also increases the area of contact between the tubular heating element 4 and the heat distribution sheet 5, since the tubular heating element 4 is in contact with two surfaces of the heat distribution sheet 5 that run transverse to one another.
  • In the embodiments displayed, the tubular heating element 4 has an approximately trapezoidal cross-section and its footprint faces the heat distribution sheet 5. As seen in the embodiment displayed in FIG. 5, such a tubular heating element 4 can also be arranged in a reverse orientation in the groove, i.e. with its footprint facing away from the bottom of the groove. In the latter case, the walls of the groove or the two steps, which form the groove, are arranged aslant to one another.
  • The tubular heating element 4 carries a support plate 7, as shown in FIGS. 1 and 5, for fixing a safety switch. The support plate 7 is preferably made of aluminium or of a good heat-conducting aluminium alloy and enables a heat coupling between the tubular heating element 4 and a thermostatic protective switch or a thermostat, with which the tubular heating element 4 can be cut off when heated beyond a rated operating temperature. Safety switches, which feature a switching operation through the snapping of a bimetallic element, are particularly suitable.
  • The heat distribution sheet 5 has a thickness of 1 mm to 1.5 mm. In the embodiment displayed, the thickness of this plate is 1.2 mm. The heat distribution sheet 5 is inductively soldered with the base body 2 and the tubular heating element 4.
    • REFERENCE NUMBERS
    • 1 Pump housing
    • 2 Base body
    • 3 Connecting piece
    • 4 Tubular heating element
    • 5 Heat distribution sheet
    • 6 Securing straps
    • 7 Support plate

Claims (20)

1. Heatable pump housing part comprising;
a heat distribution sheet fixed on the housing part;
and a tubular heating element fixed on the heat distribution sheet, the tubular heating element being positioned in a groove or a step on the housing part covered by the heat distribution sheet.
2. Pump housing part according to claim 1, wherein the step forms one wall of a groove, in which the tubular heating element is positioned.
3. Housing part according to claim 2, wherein the tubular heating element touches both the walls of the groove.
4. Pump housing part according to claim 2, wherein the heat distribution sheet extends beyond the groove or step on both sides.
5. Pump housing part according to claim 2, wherein the heat distribution sheet projects above the groove or step on both sides by at least 0.5 cm.
6. Pump housing part according to claim 1, wherein the groove is U- or C-shaped.
7. Pump housing part according to claim 1, wherein the tubular heating element is positioned on a cover or bottom surface of the housing part.
8. Pump housing part according to claim 1, wherein the tubular heating element has a trapezoidal cross-section.
9. Pump housing part according to claim 1, wherein the groove or step has two surfaces running aslant to one another.
10. Pump housing part according to claim 1, wherein the groove or step has two surfaces running perpendicular to one another.
11. Pump housing part according to claim 1, wherein the heat distribution sheet comprises securing straps encompassing the tubular heating element.
12. Pump housing part according to claim 11, wherein the securing straps are cut out from the heat distribution sheet and bent upwards.
13. Pump housing part according to claim 1, wherein the tubular heating element includes a support plate for fixing a safety switch.
14. Pump housing part according to claim 1, wherein the pump housing part is in the form of a connecting tube, the connecting tube being surrounded by the tubular heating element.
15. Pump housing part according to claim 1, wherein the tubular heating element has a trapezoidal cross-section and is positioned on the heat distribution sheet with a trapezoidal footprint on the plate
16. Pump housing part according to claim 1, wherein the tubular heating element has a trapezoidal cross-section and is positioned on the heat distribution sheet with a surface opposite to the trapezoid footprint on the plate.
17. Pump housing part according to claim 1, wherein the heat distribution sheet is made of aluminium or an aluminium alloy.
18. Pump housing part according to claim 1, wherein the housing part is made of steel.
19. Pump housing part according to claim 1, wherein the heat distribution sheet has a thickness ranging from 1 mm to 1.5 mm.
20. Pump housing part according to claim 1, wherein the tubular heating element is in contact with at least two surfaces of the heat distribution sheet running diagonally to one another.
US12/617,186 2008-11-13 2009-11-12 Heatable part of a pump housing Abandoned US20100119360A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202008015058U DE202008015058U1 (en) 2008-11-13 2008-11-13 Heatable pump housing part
DE202008015058.2 2008-11-13

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DE (2) DE202008015058U1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
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CN103573674A (en) * 2013-08-20 2014-02-12 杭州热威机电有限公司 External heating heater for pump
US9371841B2 (en) 2012-03-05 2016-06-21 Electrolux Home Products, Inc. Safety arrangement for an integrated heater, pump, and motor for an appliance
JP2016522354A (en) * 2013-06-19 2016-07-28 エーゲーオー エレクトロ・ゲレーテバウ ゲーエムベーハー Heating device for pump and pump
KR20170010549A (en) * 2015-07-20 2017-02-01 엘지전자 주식회사 Pump and Dishwasher having the Same
CN106766117A (en) * 2015-11-24 2017-05-31 杭州三花家电热管理系统有限公司 A kind of electric heater for pipeline and the dish-washing machine with it
CN106930979A (en) * 2015-12-29 2017-07-07 杭州三花家电热管理系统有限公司 Fluid pump and household electrical appliance
CN107034651A (en) * 2017-04-17 2017-08-11 海宁美力针织有限公司 A kind of dress ornament presses the peristaltic pump self-lubricating structure of forming machine
KR20180103583A (en) * 2017-03-10 2018-09-19 엘지전자 주식회사 Pump and Dishwasher comprising the Same
CN108852232A (en) * 2018-06-15 2018-11-23 广东威灵电机制造有限公司 The pump body device of dish-washing machine and dish-washing machine with it
US11287161B2 (en) * 2016-06-20 2022-03-29 Bleckmann Gmbh & Co. Kg Heating system component providing a compact temperature sensor design
US11306945B2 (en) * 2018-09-07 2022-04-19 Bleckmann Gmbh & Co. Kg Heating system for heating a fluid medium
CN114738321A (en) * 2022-04-07 2022-07-12 贝克电热科技（深圳）有限公司 Blade formula heating pump cover and heat pump
US11684234B2 (en) 2014-08-22 2023-06-27 Lg Electronics Inc. Pump and dishwasher including the same
EP3751150B1 (en) * 2017-12-19 2024-04-03 Foshan Welling Washer Motor Manufacturing Co., Ltd. Heating pump and washing appliance

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DE102017118217A1 (en) 2017-08-10 2019-02-14 Eichenauer Heizelemente Gmbh & Co. Kg Heatable pump housing part

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9371841B2 (en) 2012-03-05 2016-06-21 Electrolux Home Products, Inc. Safety arrangement for an integrated heater, pump, and motor for an appliance
JP2016522354A (en) * 2013-06-19 2016-07-28 エーゲーオー エレクトロ・ゲレーテバウ ゲーエムベーハー Heating device for pump and pump
CN103573674A (en) * 2013-08-20 2014-02-12 杭州热威机电有限公司 External heating heater for pump
US11684234B2 (en) 2014-08-22 2023-06-27 Lg Electronics Inc. Pump and dishwasher including the same
KR20170010549A (en) * 2015-07-20 2017-02-01 엘지전자 주식회사 Pump and Dishwasher having the Same
KR20220146389A (en) * 2015-07-20 2022-11-01 엘지전자 주식회사 Pump and Dishwasher having the Same
KR102459276B1 (en) * 2015-07-20 2022-10-26 엘지전자 주식회사 Pump and Dishwasher having the Same
KR102570191B1 (en) * 2015-07-20 2023-08-24 엘지전자 주식회사 Pump and Dishwasher having the Same
CN106766117A (en) * 2015-11-24 2017-05-31 杭州三花家电热管理系统有限公司 A kind of electric heater for pipeline and the dish-washing machine with it
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US11287161B2 (en) * 2016-06-20 2022-03-29 Bleckmann Gmbh & Co. Kg Heating system component providing a compact temperature sensor design
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KR102332831B1 (en) * 2017-03-10 2021-11-29 엘지전자 주식회사 Pump and Dishwasher comprising the Same
KR20180103583A (en) * 2017-03-10 2018-09-19 엘지전자 주식회사 Pump and Dishwasher comprising the Same
CN107034651A (en) * 2017-04-17 2017-08-11 海宁美力针织有限公司 A kind of dress ornament presses the peristaltic pump self-lubricating structure of forming machine
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DE102009052019A1 (en) 2010-05-27
DE102009052019B4 (en) 2017-08-03
DE102009052019C5 (en) 2020-02-20

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