EP2754900B1 - Impellerpumpe mit Heizeinrichtung - Google Patents

Impellerpumpe mit Heizeinrichtung Download PDF

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Publication number
EP2754900B1
EP2754900B1 EP13199635.7A EP13199635A EP2754900B1 EP 2754900 B1 EP2754900 B1 EP 2754900B1 EP 13199635 A EP13199635 A EP 13199635A EP 2754900 B1 EP2754900 B1 EP 2754900B1
Authority
EP
European Patent Office
Prior art keywords
pump chamber
impeller
pump
heating device
outlet
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.)
Active
Application number
EP13199635.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2754900A1 (de
Inventor
Jörn Friedrichs
Tobias Albert
Volker Block
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau 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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to PL13199635T priority Critical patent/PL2754900T3/pl
Publication of EP2754900A1 publication Critical patent/EP2754900A1/de
Application granted granted Critical
Publication of EP2754900B1 publication Critical patent/EP2754900B1/de
Active 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
    • 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
    • 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

Definitions

  • the invention relates to an impeller pump for conveying a medium.
  • an annular pump chamber is provided with a circular cylindrical shape, which surrounds an inlet in the pump chamber and arranged in the pump chamber impeller, wherein an outer wall of the pump chamber is formed by a heating device.
  • an outlet from the pump chamber is provided, from which the heated and conveyed medium emerges.
  • Another impeller pump is out of the DE 102011003464 A1 known. Again, an outer wall of a pump chamber is formed by a heater which is tubular and straight. At the end portions, the heater may have widenings or beads for improved sealing engagement.
  • the invention has for its object to provide an impeller pump mentioned above, can be eliminated with the problems of the prior art and it is particularly possible to improve a heating of a pumped by the impeller medium.
  • the impeller pump has a pump housing with a pump chamber, inlet and outlet.
  • an impeller is provided in the conveying path of the medium behind the inlet and in front of the outlet.
  • a tubular heating device is provided for heating the conveyed medium, which forms at least part of an outer wall of the pump chamber.
  • the impeller is arranged on or above a pump chamber floor.
  • the pump chamber extends annularly around the impeller and away from the pump chamber bottom, advantageously along the axial direction or the longitudinal center axis.
  • the outlet is arranged on a region of the pump chamber facing away from the pump chamber bottom in this axial direction of the impeller pump.
  • the cross-sectional area of the pump chamber is reduced in the axial direction of the longitudinal center axis of the impeller pump away from the pump chamber bottom toward the outlet or toward the outlet.
  • This reduction in the cross-sectional area of the pump chamber increases the flow rate of the pumped medium downstream or toward the outlet. So on the one hand overheating of the heater can be avoided.
  • the conveyed medium can be heated as well as possible. According to the invention, this is achieved in that the heating device is conically tapered away from the pump chamber bottom and thus causes the reduction of the cross-section or the cross-sectional area.
  • the cross-sectional area of the pump chamber in the axial direction or along the longitudinal central axis of the impeller pump away from the pump chamber bottom toward the outlet monotonically decrease. More preferably, it can be strictly monotonically reduced, so it has a steadily decreasing cross-section.
  • the reduction can be achieved by an inclined wall of the pump chamber, namely inner wall and / or the outer wall.
  • An angle of the oblique wall of the pump chamber to the longitudinal central axis of the impeller pump can be low, advantageously ranging from 3 ° to 25 °, particularly advantageously from 5 ° to 15 °.
  • At least the outer wall of the pump chamber is so inclined or inclined inwards with a corresponding angle.
  • the heater or the outer wall the pump chamber rotationally symmetrical to the longitudinal central axis. So a favorable shape for an advantageous flow is achieved. Furthermore, such a good manufacturability is given.
  • an outer wall can extend obliquely to the longitudinal center axis or causes the reduction of the cross-sectional area of the pump chamber, but also a radially inner inner wall of the pump chamber can be made obliquely. In this case, it is advantageously tilted outwards for an even smaller cross-sectional area.
  • An angle can lie here in an aforementioned range.
  • the inner wall of the pump chamber is straight, so that it runs parallel to the longitudinal center axis of the impeller pump.
  • the cross section formed by her or her radius should be the same, this should also apply to their shape.
  • a surface power of the heating can remain the same, so that less heating power is generated overall in this area because of the reduced area.
  • the area performance may increase, advantageously by 5% to 25% or even 50%. It can be provided, for example, that in the axial direction of the pump, a power per unit height remains approximately the same for the heater. So there is also near the outlet from the pump chamber before an increased area performance and thus because of the increased flow rate here, the pumped medium is heated even more.
  • the heater may extend from the bottom of the pump chamber to just before the axial height of the outlet. It projects beyond the impeller advantageous at least in the axial direction to the outlet, advantageously by a multiple of the height of the impeller. In the axial direction away from the outlet, the heater may also slightly project beyond the impeller, but here advantageously only slightly. In particular, a heating or a heating element of the heating device in this direction should only project slightly beyond the impeller, since in this area the delivery of medium is less.
  • the heating device or a heating or a heating element of the heating device should at least circulate around the largest part of the pump chamber. This is advantageous at least 70%, particularly advantageous it runs completely.
  • the term heating device is understood to mean both a carrier and a heating arranged on it or one or more heating elements.
  • a heating of the heating device is provided on a surface or distributed over a surface, for example in tracks or in fields.
  • one or more heating elements may be provided, which, however, the person skilled in the art knows from the prior art and which are advantageously thin-film or thick-film heating elements.
  • the heating should be provided on the side of the heater outside the pump chamber. So corrosion problems and insulation problems are avoided or are less and an electrical connection is easier.
  • the inlet may extend into the pump chamber until just before the impeller. It can work at less than 50% of the height of the pump chamber in the axial direction, for example at about 20% or 30% to 40%. Thus, the inlet is just close to the impeller.
  • the pump chamber has essentially only the one hand on the area in which the impeller runs or needs the impeller, and on the other hand, the area which extends around the annular ring around the impeller and in the conveying path of the medium adjoins this.
  • an impeller pump 11 according to the invention is shown in a sectional side view.
  • the pump 11 has a pump housing 12 with a pump chamber 13.
  • An inlet 15 leads centrally into the pump chamber 13 and an outlet 16 at the upper edge out. It can be seen that the inlet 15 is aligned axially with the dashed longitudinal center axis 17, while the outlet 16, as well as the plan view of the Fig. 3 shows, perpendicular thereto or tangent to the rotating pump chamber 13.
  • the pump chamber 13 is substantially of an outer wall 19 and an inner wall 20 and of Limits a pump chamber bottom 21 down. It can also be seen that the height of the pump chamber 13 in the axial direction about four to six times the width of the pump chamber 13 close to the pump chamber bottom 21, in the radial direction, has.
  • an impeller 23 rotates, which extends almost to the inlet 15, wherein it is driven by a motor shaft 24 by a pump motor, not shown.
  • the direction of rotation of the impeller 23 is in the Fig. 3 counterclockwise and in the Fig. 1 left of the impeller 23 out of the plane and right into the plane, as represented by corresponding symbols.
  • the structure of the pump 11 substantially corresponds to the above-mentioned prior art in the form of EP 2150165 B1 ,
  • To be conveyed and heated liquid, especially water in a dishwasher, washing machine or the like, is introduced to the inlet 15 along the longitudinal center axis 17 and discharged from the rotating impeller 23 in the radial direction, just above the pump chamber bottom 21.
  • the liquid has a circulation direction in accordance with the direction of rotation of the impeller 23. At the same time, it continues to rise in the pump chamber 13 upwards, mainly along the outer wall 19, until finally, after several revolutions, advantageously three to ten revolutions, it is conveyed out to the outlet 16. In the pump chamber 13, it is heated. This is illustrated in each case by the three arrows, wherein the arrow in the pump chamber 13 shows only the movement component upwards and not the by far predominant component of movement in the direction of rotation in the pump chamber 13.
  • the pump housing 12 is substantially rotationally symmetrical except for the outlet 16, that the cross section of the pump chamber 13, which is always the same along the circumferential direction at an axial height, tapers from the pump chamber bottom 21 and from the impeller 23 and toward the outlet 16.
  • the width of the pump chamber 13 at the top below the apex point or shortly before the outlet 16 is only about 40% of the width at the level of the impeller 23. This is thus a significant reduction in the cross-sectional area of the pump chamber 13.
  • the inner wall 20 is perpendicular to the plane of the pump chamber bottom 21, and the angle ⁇ between its course and the perpendicular to the pump chamber bottom 21 and to the longitudinal central axis 17 is 0 °.
  • the inner wall 20 is also straight.
  • the inner wall 20 is integrally formed with the inlet 15 and the upper, quasi designed as a lid region of the pump housing 12, from which also the outlet 16 in one piece.
  • This part is advantageously made of plastic.
  • the largest portion of the outer wall 19 is formed as a heater 26, as it is in principle also of the outer wall of the EP 2150165 B1 is known. However, there is the heater just round cylindrical and straight, so with a constant cross-sectional area, which is just not the case here.
  • the left in the Fig. 1 shown heating device 26 has a support as part of the outer wall 19, which advantageously consists of metal or is a stainless steel. It is on its outside, as again known from the prior art, at least partially provided with an insulation, on which in turn heating elements are applied.
  • heating elements 28a to 28e which are designed, for example, as substantially circumferential resistance paths, advantageously in a thick-film heating elements. They can be electrically connected in parallel with each other. It can be seen that the width of the heating elements 28 decreases away from the pump chamber bottom 21 to the outlet 16 and thus increases the heat generation upwards.
  • a heating device 26 'with a flat heating element 28' is shown. This should be illustrated above all that here, unlike on the left side, the area performance in the direction away from the pump chamber bottom 21 for the heater 26 'remains the same.
  • the main technical effect of the reduction of the cross-sectional area or the taper of the pump chamber 13 from bottom to top is that here the flow velocity is increased. This favors a heat dissipation from the heater 26. Especially in connection with the heating device 26 shown on the left with increasing surface area of the heating, this is advantageous. Thus, a better heating of the pumped medium or the conveyed liquid can be achieved without local overheating of the heater 26th
  • the outer wall 19 above the heating device 26 is formed by the plastic part of the pump housing 12.
  • a sealed connection between these two parts is easy to realize for the expert, for example by means of rubber seals.
  • the heater 26 could be led even higher, but then there are design problems because of the outlet 16.
  • a seal also take place between the lower region of the heating device 26 or 26 'and the pump chamber bottom 21.
  • a pump housing 112 is provided with a pump chamber 113, as well as an inlet 115, an outlet 116 and a dashed longitudinal center axis 117.
  • An outer wall 119 is in turn inclined to the longitudinal central axis 117 and to a pump chamber bottom 121.
  • the angle ⁇ ' is less than in Fig. 1 and advantageously only 5 °.
  • an inner wall 120 of the pump housing 112 is inclined, obliquely outwards.
  • An angle ⁇ 'here is also 5 ° corresponding to the angle ⁇ ', although this need not be mandatory.
  • a pump chamber 113 with a reduced cross-sectional area in the direction away from the pump chamber bottom 121, ie, an upwardly tapered pump chamber 113 is also produced as a result.
  • heating device 126 As the major part of the outer wall 119 of the pump chamber 113, only a flat heating element 128 is generally shown. For this heating element 128, the same design possibilities as in the Fig. 1 apply or even more.
  • the plan view of the pump 11 according to Fig. 1 in the Fig. 3 is to illustrate, in essence, to what extent the pump 11 and the pump housing 12 without the outlet 16 is rotationally symmetrical, so circular. This applies above all to the outer wall 19 and the inner wall 20. However, this rotational symmetry does not necessarily have to be, and it is simple and advantageous for the production of the pump, in particular as regards the production of the heating device 26 as an essential part of the outer wall 19.

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)
EP13199635.7A 2013-01-10 2013-12-27 Impellerpumpe mit Heizeinrichtung Active EP2754900B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13199635T PL2754900T3 (pl) 2013-01-10 2013-12-27 Pompa wirowa z urządzeniem grzejnym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013200280.7A DE102013200280A1 (de) 2013-01-10 2013-01-10 Impellerpumpe

Publications (2)

Publication Number Publication Date
EP2754900A1 EP2754900A1 (de) 2014-07-16
EP2754900B1 true EP2754900B1 (de) 2016-10-12

Family

ID=49916925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13199635.7A Active EP2754900B1 (de) 2013-01-10 2013-12-27 Impellerpumpe mit Heizeinrichtung

Country Status (6)

Country Link
US (1) US9771950B2 (es)
EP (1) EP2754900B1 (es)
CN (1) CN103925247B (es)
DE (1) DE102013200280A1 (es)
ES (1) ES2608335T3 (es)
PL (1) PL2754900T3 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013201319A1 (de) 2013-01-28 2014-07-31 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung, Herstellungsverfahren für eine Heizeinrichtung und Pumpe
EP3901466B1 (en) * 2020-04-24 2023-10-25 E.G.O. Elektro-Gerätebau GmbH Method for operating a pump

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069735A (en) * 1960-03-18 1962-12-25 Ohio Commw Eng Co Method and apparatus for sterilizing water
US4420160A (en) * 1980-03-10 1983-12-13 The Garrett Corporation Face seal system
JPS5872699A (ja) 1981-10-27 1983-04-30 Mitsubishi Electric Corp 電動ポンプ
US4810174A (en) * 1986-12-12 1989-03-07 Flint & Walling, Inc. Motor and pump assembly
US5011371A (en) * 1987-04-29 1991-04-30 General Motors Corporation Centrifugal compressor/pump with fluid dynamically variable geometry diffuser
US5813758A (en) * 1993-12-10 1998-09-29 Ahlstrom Machinery Inc. Concentric ring fluidizing mixer
DE19858137B4 (de) * 1998-12-16 2016-12-15 BSH Hausgeräte GmbH Heizung zum Erwärmen der Spülflüssigkeit in einer Geschirrspülmaschine
DE102007017271A1 (de) 2007-04-12 2008-10-16 BSH Bosch und Siemens Hausgeräte GmbH Pumpe mit Heizeinrichtung
DE102007060193A1 (de) 2007-12-14 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Wasserführendes Haushaltsgerät
DE102010043727A1 (de) 2010-11-10 2012-05-10 E.G.O. Elektro-Gerätebau GmbH Pumpe
DE102011003464A1 (de) * 2011-02-01 2012-04-26 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung für eine Pumpe und Pumpe
DE102011003467A1 (de) 2011-02-01 2012-08-02 E.G.O. Elektro-Gerätebau GmbH Heizeinrichtung für eine Pumpe und Pumpe
DE102011005138A1 (de) * 2011-03-04 2012-09-06 E.G.O. Elektro-Gerätebau GmbH Pumpe
CN102748329B (zh) 2011-04-15 2017-02-22 德昌电机(深圳)有限公司 加热泵
DE102012210554A1 (de) 2012-06-22 2013-12-24 E.G.O. Elektro-Gerätebau GmbH Pumpe

Also Published As

Publication number Publication date
CN103925247B (zh) 2018-01-19
EP2754900A1 (de) 2014-07-16
US20140193247A1 (en) 2014-07-10
DE102013200280A1 (de) 2014-07-10
US9771950B2 (en) 2017-09-26
PL2754900T3 (pl) 2017-07-31
ES2608335T3 (es) 2017-04-07
CN103925247A (zh) 2014-07-16

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