EP3126679B1 - Centrifugal pump for household appliances - Google Patents
Centrifugal pump for household appliances Download PDFInfo
- Publication number
- EP3126679B1 EP3126679B1 EP15720441.3A EP15720441A EP3126679B1 EP 3126679 B1 EP3126679 B1 EP 3126679B1 EP 15720441 A EP15720441 A EP 15720441A EP 3126679 B1 EP3126679 B1 EP 3126679B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centrifugal pump
- impeller
- pumping chamber
- fins
- axis
- 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
Links
- 238000005086 pumping Methods 0.000 claims description 45
- 239000007788 liquid Substances 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000002093 peripheral effect Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000004851 dishwashing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
- F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
-
- 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 present invention relates to a centrifugal pump, or turbo pump, in particular for household appliances, with pumping chamber in which the liquid crossing it is heated.
- a liquid typically water
- forced circulation and heated for the operations for which they are designed.
- centrifugal pump which pumping chamber accommodates a bladed impeller, which impresses a centrifugal push to the water.
- a centrifugal pump having a bladed impeller is disclosed in DE-A-102007017271 .
- the suction of the water in centrifugal pumps takes place in axial direction, while the delivery is in radial or tangential direction.
- the water crosses an axial suction conduit thus reaching the pumping chamber, where it acquires kinetic energy and pressure energy, to then cross a delivery conduit with axis which is substantially orthogonal to the suction conduit and directed tangentially to the perimeter of the pumping chamber.
- Centrifugal pumps for household appliances operate together with a heating element, such as for example, a heating resistor.
- the heating element is generally at the upper part of the pumping chamber, that is approximately at the axial elevation of the outlet of the suction conduit.
- the main disadvantage associated with traditional centrifugal pumps relates to heating the liquid circulating inside the pumping chamber, and in particular relates to the heat exchange that takes place between the heating element and the liquid. Indeed, while the liquid which is close to the heating element is effectively heated, the efficiency of the heat exchange decreases with the distance of the liquid from the heating element.
- a further disadvantage of traditional centrifugal pumps relates to the establishment of a turbulent flow inside the pumping chamber, with the relative formation of flow vortexes, which negatively affects the efficiency of the centrifugal pump, furthermore generating undesired vibrations and deteriorating the overall performance of the household appliance. For this reason, snail-shell shaped pumping chambers have been proposed.
- centrifugal pumps for household appliances are not known in which the efficiency of the heat exchange is optimized between the heating element and the liquid circulating inside the pumping chamber and in which good circulation of the fluid is promoted.
- the main object of the present invention is to provide a centrifugal pump for household appliances, in which the heat exchange is optimized between the water circulating in the centrifugal pump and the heating element adapted to heat the liquid which is typically the water.
- a further object of the present invention is to provide a centrifugal pump in which there is increased circulation of the water inside the pumping chamber.
- centrifugal pump comprising:
- the heat exchange between the heating element and the liquid crossing the centrifugal pump according to the invention is indeed significantly optimized due to the presence of the helical fins.
- the centrifugal pump 1 comprises a substantially cylindrical pumping chamber 20, or flow channel, delimited by a substantially cylindrical tubular body 2. Inside the pumping chamber 20 there is a bladed impeller 3 defining an axis Y, which is keyed onto a rotating shaft arranged in a relative housing. Axis Y passes through the middle of the tubular body 2, and is parallel to the cylindrical lateral wall. On the cylindrical lateral wall of the pumping chamber 20, and therefore of the tubular body 2 delimiting it, there is an opening from which a delivery conduit 5 branches off of the fluid to be pumped, which is typically water. The axis of the delivery conduit 5 is approximately orthogonal with respect to axis Y and parallel to the tangent at the outer perimeter of the pumping chamber 20 at the point in which the delivery conduit 5 branches off.
- a suction conduit 4,or inlet conduit of the fluid having a first stretch coaxial to the longitudinal axis Y, to then bend by approximately 90° thus forming a second stretch.
- the suction conduit 4 may be straight, or may not be present.
- the diameter of the suction conduit 4 is less than the diameter of the pumping chamber 2.
- the tubular body 2 has a lower closing element or closing disk, not shown, which is fixed to a lower end 8 of the tubular body 2.
- the term height or the term elevation is intended as the distance along the longitudinal axis Y, taking as reference the lower end 8 of the tubular body 2.
- the tubular body 2 is provided with an upper closing element, or cover 7, provided with a central opening.
- the peripheral edge of cover 7 is restrained to the upper peripheral edge of the tubular body 2, and the central opening of the cover 7 is restrained about the lower end of the suction conduit 4, which is the end where there is the opening from which the fluid leaves the suction conduit 4 to be emitted into the pumping chamber 20.
- the lower closing element and cover 7 provide an airtight closure of the pumping chamber 20.
- Cover 7 is provided with an annular groove 9, that is a substantially circular groove, if seen in plan view, which extends deep toward direction parallel to axis Y and toward the pumping chamber 20.
- the extension of the pumping chamber 20 along axis Y is constant at the annular groove 9.
- a heating element preferably a heating resistor, of substantially annular shape is accommodated inside the annular groove 9 of cover 7.
- Cover 7 is preferably made of material with adequate heat conductivity for such a function, for example a metallic material.
- Impeller 3 is accommodated between an upper covering 10 and a lower covering 11, while laterally it faces directly into the pumping chamber 20, so that there is, between the upper covering 10 and the lower covering 11, a section from which the liquid is ejected by the blades of impeller 3.
- the upper covering 10 has a central opening, or inlet section, coaxial to axis Y, which lets in the liquid originating from the suction conduit 4; the liquid is then pushed by impeller 3 in direction transversal to axis Y.
- the outlet of the suction conduit 4 can be partly inside the inlet section of the upper covering 10, or facing the latter without overlapping.
- the inner surface of the cylindrical wall of the tubular body 2 is provided with two helical profile fins 6a, 6b, which extend radially in transversal direction with respect to the lateral wall of the pumping chamber 20.
- the fins 6a, 6b extend radially starting from the inner surface of the cylindrical lateral wall, toward impeller 3.
- the fins 6a, 6b can be arranged at a height along axis Y equal to approximately half of the height of the pumping chamber 20, at the annular groove 9.
- the radial extension, that is along a direction substantially orthogonal to axis Y, of the fins 6a, 6b can be greater than or equal to the radial extension of the annular groove 9.
- each fin 6a, 6b increases constantly and progressively in clockwise direction, so that each fin 6a, 6b has a lower end 21, 21', having a minimum elevation along axis Y, and an upper end 22, 22' having a maximum elevation along axis Y.
- the lower ends 21, 21' are distal from cover 7 and the upper ends 22, 22' are proximal to cover 7.
- the two fins 6a, 6b are spaced from each other by a predetermined angular distance with respect to the longitudinal axis Y.
- the fins 6a, 6b are arranged so that the minimum elevation of the first fin 6a corresponds to approximately the minimum elevation of the second fin 6b, and so that the maximum elevation of the first fin 6a corresponds to the maximum elevation of the second fin 6b.
- each fin is arranged approximately at the peripheral edge of the lower covering 11 of impeller 3.
- the fins 6a, 6b are integral to the tubular body 2 and therefore to the inner lateral wall of the pumping chamber 20.
- the fins 6a, 6b each have an inner edge 23, 23' and each inner edge is spaced radially from the peripheral edge of the lower covering 11 of impeller 3.
- the peripheral edge of impeller 3 faces directly onto the inner edge 23, 23' of each fin 6a, 6b.
- the presence of the fins 6a, 6b and the arrangement thereof with respect to impeller 3 is particularly advantageous. Indeed, the liquid that is pushed by impeller 3 is emitted into the pumping chamber 20 and is guided by the fins 6a, 6b. In particular, the fins 6a, 6b guide and support the liquid let into the centrifugal pump 1 so that most thereof remains in the upper portion of the pumping chamber 20 for the longest time possible.
- the upper portion of the pumping chamber 20, which is substantially the portion above the fins 6a, 6b, is the closest to the heat source provided by the heating resistor accommodated in the annular groove 9 of cover 7 of the tubular body 2. Thereby, the heat exchange between the heating element, that is the heating resistor, and the liquid that crosses the pumping chamber 20, is significantly optimized due to the presence of the fins 6a, 6b inside the pumping chamber 20.
- the liquid then continues the path of forced circulation by crossing the delivery conduit 5.
- the presence of the fins 6a, 6b is furthermore advantageous because it eliminates, or at least significantly reduces, the establishment of a turbulent flow operation, with which undesired flow vortexes are associated.
- the centrifugal pump 1 allows the heating of the liquid circulating in the pumping chamber 20 to be optimized, the volume of the pumping chamber being equal and the speed of rotation of the impeller being equal.
- the mass of water, and therefore the flow rate, that can be processed by the centrifugal pump of the invention is equal to the mass of water that can be processed with a traditional centrifugal pump, but by using the centrifugal pump of the invention, the heating of the liquid is obtained in significantly more efficient manner. Further construction variants apparent to a field technician do not depart from the scope of the present invention.
- the number of fins can be varied, for example using a single fin or a plurality of fins, for example three or four fins. Preferably, there are only two fins.
- Other construction details which can be varied without departing from the scope of the present invention are, solely by way of non-limiting example, the angular distance between the fins, the radial extension of the fins, the height of the fins along axis Y, and the difference in elevation between the upper end and the lower end of each fin.
- the inner surface of the cylindrical lateral wall of the tubular body is preferably smooth, with the exception of the protrusions which are formed by the fins.
- the fins 6a, 6b can also be reversibly restrained to the inner surface of the lateral wall of the pumping chamber 20 so as, for example, to be replaced should they deteriorate.
- the fins can be engaged on, and detached from the inner surface of the cylindrical wall.
- the fins can be welded or brazed to the inner surface of the cylindrical wall.
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- 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)
Description
- The present invention relates to a centrifugal pump, or turbo pump, in particular for household appliances, with pumping chamber in which the liquid crossing it is heated.
- In common household appliances, such as for example washing machines and dishwashing machines, a liquid, typically water, is subjected to forced circulation and heated for the operations for which they are designed.
- The forced circulation of the water in such household appliances takes place by means of a centrifugal pump, which pumping chamber accommodates a bladed impeller, which impresses a centrifugal push to the water. An example of a centrifugal pump having a bladed impeller is disclosed in
DE-A-102007017271 . The suction of the water in centrifugal pumps takes place in axial direction, while the delivery is in radial or tangential direction. - Due to the vacuum created by the rotation of the impeller, the water crosses an axial suction conduit thus reaching the pumping chamber, where it acquires kinetic energy and pressure energy, to then cross a delivery conduit with axis which is substantially orthogonal to the suction conduit and directed tangentially to the perimeter of the pumping chamber.
- Centrifugal pumps for household appliances operate together with a heating element, such as for example, a heating resistor. The heating element is generally at the upper part of the pumping chamber, that is approximately at the axial elevation of the outlet of the suction conduit.
- The main disadvantage associated with traditional centrifugal pumps relates to heating the liquid circulating inside the pumping chamber, and in particular relates to the heat exchange that takes place between the heating element and the liquid. Indeed, while the liquid which is close to the heating element is effectively heated, the efficiency of the heat exchange decreases with the distance of the liquid from the heating element.
- A further disadvantage of traditional centrifugal pumps relates to the establishment of a turbulent flow inside the pumping chamber, with the relative formation of flow vortexes, which negatively affects the efficiency of the centrifugal pump, furthermore generating undesired vibrations and deteriorating the overall performance of the household appliance. For this reason, snail-shell shaped pumping chambers have been proposed.
- Nevertheless, such a solution does not completely resolve the problem of the circulation of the liquid and the heating of the liquid is not particularly optimized.
- To date, centrifugal pumps for household appliances are not known in which the efficiency of the heat exchange is optimized between the heating element and the liquid circulating inside the pumping chamber and in which good circulation of the fluid is promoted.
- The main object of the present invention is to provide a centrifugal pump for household appliances, in which the heat exchange is optimized between the water circulating in the centrifugal pump and the heating element adapted to heat the liquid which is typically the water.
- A further object of the present invention is to provide a centrifugal pump in which there is increased circulation of the water inside the pumping chamber.
- Therefore a centrifugal pump is provided, according to
claim 1, comprising: - an inlet conduit for letting a liquid into the centrifugal pump,
- a delivery conduit for letting the liquid out of the centrifugal pump,
- a bladed impeller, defining an axis Y, for circulating the liquid and ejecting it into a direction transversal to said axis Y,
- a tubular body coaxial to said axis Y which delimits a pumping chamber in which the impeller is accommodated, having a cylindrical lateral wall with an inner surface,
- a cover which closes the pumping chamber and comprises an annular groove,
- a heating element arranged inside the annular groove,
- The heat exchange between the heating element and the liquid crossing the centrifugal pump according to the invention is indeed significantly optimized due to the presence of the helical fins.
- Further features and advantages of the invention will be more apparent in light of the detailed description of a preferred, but not exclusive, embodiment of a centrifugal pump according to the invention, shown by way of non-limiting example, with the aid of the accompanying drawings, wherein:
-
Fig. 1 shows a sectional view of a centrifugal pump according to the present invention; -
Fig. 2 shows a top view of the centrifugal pump ofFig. 1 ; -
Fig. 3 shows a sectional view of a pumping chamber of the pump ofFig. 1 ; -
Fig. 4 shows a perspective view of a detail of the centrifugal pump ofFig. 1 ; -
Fig. 5 shows a top view of a further detail of the centrifugal pump ofFig. 1 . - The
centrifugal pump 1 according to the present invention comprises a substantiallycylindrical pumping chamber 20, or flow channel, delimited by a substantially cylindricaltubular body 2. Inside thepumping chamber 20 there is abladed impeller 3 defining an axis Y, which is keyed onto a rotating shaft arranged in a relative housing. Axis Y passes through the middle of thetubular body 2, and is parallel to the cylindrical lateral wall. On the cylindrical lateral wall of thepumping chamber 20, and therefore of thetubular body 2 delimiting it, there is an opening from which a delivery conduit 5 branches off of the fluid to be pumped, which is typically water. The axis of thedelivery conduit 5 is approximately orthogonal with respect to axis Y and parallel to the tangent at the outer perimeter of thepumping chamber 20 at the point in which the delivery conduit 5 branches off. - At the top of the
pumping chamber 20, there is emitted asuction conduit 4,or inlet conduit of the fluid, having a first stretch coaxial to the longitudinal axis Y, to then bend by approximately 90° thus forming a second stretch. - Alternatively, the
suction conduit 4 may be straight, or may not be present. - The diameter of the
suction conduit 4 is less than the diameter of thepumping chamber 2. - The
tubular body 2 has a lower closing element or closing disk, not shown, which is fixed to alower end 8 of thetubular body 2. - Within this context, unless otherwise specified, the term height or the term elevation is intended as the distance along the longitudinal axis Y, taking as reference the
lower end 8 of thetubular body 2. - The
tubular body 2 is provided with an upper closing element, orcover 7, provided with a central opening. The peripheral edge ofcover 7 is restrained to the upper peripheral edge of thetubular body 2, and the central opening of thecover 7 is restrained about the lower end of thesuction conduit 4, which is the end where there is the opening from which the fluid leaves thesuction conduit 4 to be emitted into thepumping chamber 20. The lower closing element andcover 7 provide an airtight closure of thepumping chamber 20. -
Cover 7 is provided with anannular groove 9, that is a substantially circular groove, if seen in plan view, which extends deep toward direction parallel to axis Y and toward thepumping chamber 20. - The extension of the
pumping chamber 20 along axis Y is constant at theannular groove 9. - A heating element, preferably a heating resistor, of substantially annular shape is accommodated inside the
annular groove 9 ofcover 7. - Thereby, the heat generated by the heating resistor is transferred to the
annular groove 9 ofcover 7, which by heating up, in turn transfers the heat to the liquid in thepumping chamber 20 below, and in particular to the liquid close to theannular groove 9.Cover 7 is preferably made of material with adequate heat conductivity for such a function, for example a metallic material. -
Impeller 3 is accommodated between anupper covering 10 and alower covering 11, while laterally it faces directly into thepumping chamber 20, so that there is, between theupper covering 10 and thelower covering 11, a section from which the liquid is ejected by the blades ofimpeller 3. Theupper covering 10 has a central opening, or inlet section, coaxial to axis Y, which lets in the liquid originating from thesuction conduit 4; the liquid is then pushed byimpeller 3 in direction transversal to axis Y. - The outlet of the
suction conduit 4 can be partly inside the inlet section of theupper covering 10, or facing the latter without overlapping. - Advantageously, the inner surface of the cylindrical wall of the
tubular body 2 is provided with twohelical profile fins pumping chamber 20. In particular, thefins impeller 3. Thefins pumping chamber 20, at theannular groove 9. - The radial extension, that is along a direction substantially orthogonal to axis Y, of the
fins annular groove 9. - As shown in
Figures 3 ,4 and5 , the elevation of eachfin fin lower end 21, 21', having a minimum elevation along axis Y, and anupper end 22, 22' having a maximum elevation along axis Y. In other words, thelower ends 21, 21' are distal fromcover 7 and theupper ends 22, 22' are proximal to cover 7. The twofins - More specifically, the
fins first fin 6a corresponds to approximately the minimum elevation of thesecond fin 6b, and so that the maximum elevation of thefirst fin 6a corresponds to the maximum elevation of thesecond fin 6b. - The
upper end 22, 22' of each fin is arranged approximately at the peripheral edge of thelower covering 11 ofimpeller 3. According to the present embodiment of the invention, thefins tubular body 2 and therefore to the inner lateral wall of the pumpingchamber 20. Thefins inner edge 23, 23' and each inner edge is spaced radially from the peripheral edge of thelower covering 11 ofimpeller 3. - Preferably, the peripheral edge of
impeller 3 faces directly onto theinner edge 23, 23' of eachfin - The presence of the
fins impeller 3 is particularly advantageous. Indeed, the liquid that is pushed byimpeller 3 is emitted into the pumpingchamber 20 and is guided by thefins fins centrifugal pump 1 so that most thereof remains in the upper portion of the pumpingchamber 20 for the longest time possible. As described above, the upper portion of the pumpingchamber 20, which is substantially the portion above thefins annular groove 9 ofcover 7 of thetubular body 2. Thereby, the heat exchange between the heating element, that is the heating resistor, and the liquid that crosses the pumpingchamber 20, is significantly optimized due to the presence of thefins chamber 20. - The liquid then continues the path of forced circulation by crossing the
delivery conduit 5. - It shall be noted that the contrivance of positioning the upper end of each fin at the outlet of the liquid from the blades of
impeller 3 determines that most of the liquid coming out from the blades ofimpeller 3 advantageously is guided and supported by thefins - The presence of the
fins - Due to the fact that the
fins tubular body 2 of the pumpingchamber 20, there are no intermediate parts or rings, thus reducing the construction complexity of the centrifugal pump according to the invention with respect to the state of the art. Furthermore, by comparing acentrifugal pump 1 according to the present invention with a pumpingchamber 20 provided with theaforesaid fins pumping chamber 20 to be optimized, the volume of the pumping chamber being equal and the speed of rotation of the impeller being equal. In other words, the mass of water, and therefore the flow rate, that can be processed by the centrifugal pump of the invention is equal to the mass of water that can be processed with a traditional centrifugal pump, but by using the centrifugal pump of the invention, the heating of the liquid is obtained in significantly more efficient manner. Further construction variants apparent to a field technician do not depart from the scope of the present invention. - For example, the number of fins can be varied, for example using a single fin or a plurality of fins, for example three or four fins. Preferably, there are only two fins. Other construction details which can be varied without departing from the scope of the present invention are, solely by way of non-limiting example, the angular distance between the fins, the radial extension of the fins, the height of the fins along axis Y, and the difference in elevation between the upper end and the lower end of each fin.
- The inner surface of the cylindrical lateral wall of the tubular body is preferably smooth, with the exception of the protrusions which are formed by the fins.
- The
fins chamber 20 so as, for example, to be replaced should they deteriorate. In other words, the fins can be engaged on, and detached from the inner surface of the cylindrical wall. Alternatively, the fins can be welded or brazed to the inner surface of the cylindrical wall.
in which at least one fin is provided fixed to the inner surface of the cylindrical lateral wall, at an outlet section of said impeller so that the liquid ejected by the impeller is channelled at least initially into a portion of the pumping chamber in contact with the cover when the pump is operating.
Claims (7)
- A centrifugal pump (1) comprising:- an inlet conduit (4) for letting a liquid into the centrifugal pump,- a delivery conduit (5) for letting the liquid out of the centrifugal pump,- a bladed impeller (3), defining an axis (Y), for circulating the liquid and ejecting it into a direction transversal to said axis (Y),- a tubular body (2) coaxial to said axis (Y) which delimits a pumping chamber (20) wherein the impeller (3) is accommodated, having a cylindrical lateral wall with an inner surface,characterized in that said pump (1) comprises:- a cover (7) which closes the pumping chamber (20) and comprises an annular groove (9),- a heating element arranged inside the annular groove (9),wherein the extension of the pumping chamber (20) along the axis (Y) is constant at said annular groove (9),
wherein the centrifugal pump (1) comprises a plurality of fins (6a, 6b) fixed to the inner surface of the cylindrical lateral wall, at an outlet section of said impeller (3) wherein the fins (6a, 6b) have a helical profile with axis of the helix corresponding to the axis (Y) of the impeller, and
wherein the fins (6a, 6b) are spaced from each other by a predetermined angular distance,
so that the liquid ejected by the impeller (3) is channelled at least initially into a portion of the pumping chamber (20) in contact with the cover (7) when the centrifugal pump is operating. - A centrifugal pump (1) according to claim 1, wherein each fin (6a, 6b) has a lower end (21, 21'), which is distal from the cover (7), and an upper end (22, 22'), which is proximal to the cover (7).
- A centrifugal pump (1) according to claim 2, wherein said upper end (22, 22') is arranged at the outlet section of the impeller (3).
- A centrifugal pump (1) according to any one of the preceding claims, wherein each fin is spaced radially from the outlet section of the impeller (3).
- A centrifugal pump (1) according to any one of the preceding claims, wherein each fin (6a, 6b) has a smaller or equal radial extension than the radial extension of the annular groove (9).
- A centrifugal pump (1) according to any one of the preceding claims, wherein each fin (6a, 6b) is restrained to the wall of the tubular body (2).
- A centrifugal pump (1) according to any one of the preceding claims, comprising two fins (6a, 6b).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITRM20140157 | 2014-03-26 | ||
PCT/IB2015/052240 WO2015145386A1 (en) | 2014-03-26 | 2015-03-26 | Centrifugal pump for household appliances |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3126679A1 EP3126679A1 (en) | 2017-02-08 |
EP3126679B1 true EP3126679B1 (en) | 2020-02-19 |
Family
ID=50819880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15720441.3A Active EP3126679B1 (en) | 2014-03-26 | 2015-03-26 | Centrifugal pump for household appliances |
Country Status (2)
Country | Link |
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EP (1) | EP3126679B1 (en) |
WO (1) | WO2015145386A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108533529B (en) * | 2017-03-06 | 2021-04-06 | 三花亚威科电器设备(芜湖)有限公司 | Integrated heating pump |
CN107514392B (en) * | 2017-08-31 | 2019-04-05 | 广东威灵电机制造有限公司 | Fluid pumping apparatus and household electrical appliance |
CN107514391B (en) * | 2017-08-31 | 2020-03-31 | 广东威灵电机制造有限公司 | Fluid pumping device and household appliance |
CN114673690A (en) * | 2022-04-22 | 2022-06-28 | 山东建筑大学 | Gap drainage blade type diffuser for centrifugal pump |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007017271A1 (en) * | 2007-04-12 | 2008-10-16 | BSH Bosch und Siemens Hausgeräte GmbH | Pump with heating device |
ES2351271B1 (en) * | 2009-01-26 | 2011-11-15 | Coprecitec, S.L. | FLUID CIRCULATION PUMP ADAPTED TO AN APPLIANCES. |
DE102011005139B4 (en) * | 2011-03-04 | 2014-05-28 | E.G.O. Elektro-Gerätebau GmbH | Flow guide for a pump and pump |
CN103089710B (en) * | 2011-10-28 | 2016-07-06 | 德昌电机(深圳)有限公司 | Heat pump |
DE102012202065B3 (en) * | 2012-02-10 | 2013-05-29 | E.G.O. Elektro-Gerätebau GmbH | Pump and method for heating a pump |
DE102012202491B3 (en) * | 2012-02-17 | 2013-08-08 | E.G.O. Elektro-Gerätebau GmbH | Guide wheel for an impeller pump and impeller pump |
-
2015
- 2015-03-26 EP EP15720441.3A patent/EP3126679B1/en active Active
- 2015-03-26 WO PCT/IB2015/052240 patent/WO2015145386A1/en active Application Filing
Non-Patent Citations (1)
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Publication number | Publication date |
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EP3126679A1 (en) | 2017-02-08 |
WO2015145386A1 (en) | 2015-10-01 |
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