CN109424553B - Pump and method of operating the same - Google Patents
Pump and method of operating the same Download PDFInfo
- Publication number
- CN109424553B CN109424553B CN201710778432.9A CN201710778432A CN109424553B CN 109424553 B CN109424553 B CN 109424553B CN 201710778432 A CN201710778432 A CN 201710778432A CN 109424553 B CN109424553 B CN 109424553B
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- Prior art keywords
- wall
- pump
- stator assembly
- shell
- rotor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0673—Units comprising pumps and their driving means the pump being electrically driven the motor being of the inside-out type
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- 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
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2205—Conventional flow pattern
- F04D29/2222—Construction and assembly
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A pump comprises a pump shell, a cavity arranged in the pump shell, a liquid inlet and a liquid outlet which radially penetrate through the pump shell and are communicated with the cavity, a stator assembly accommodated in the cavity, a rotor assembly accommodated in the cavity and matched with the stator assembly, and a bearing rotationally connected with the rotor assembly. The bearing is housed within the stator assembly. The pump shell is provided with a bottom wall positioned at the bottom of the cavity, and the stator assembly is fixed on the bottom wall. The rotor assembly is provided with a rotor shell covering the stator assembly from top to bottom, a rotating shaft in rotating fit with the bearing and at least two blades extending into the cavity from the periphery of the rotor shell, and the at least two blades are arranged on the periphery of the rotor shell along the radial direction. Due to the arrangement, the pump is compact in structure, and the space occupation in the axial direction is greatly reduced.
Description
Technical Field
The invention relates to the field of household appliances, in particular to a pump.
Background
In the field of dishwashers, washing machines, the washing pump is one of the core components. However, since long time ago, the washing pump occupies most of the space inside the product, the conventional washing pump is provided with a driving motor and a washing impeller arranged at one end of the driving motor, in order to match with the washing impeller, the driving shaft of the driving motor obviously needs to be long in the axial direction, and meanwhile, in order to match with the washing impeller, the washing pump also needs to provide a large washing chamber for accommodating the washing impeller; in addition, since the drive motor needs to be waterproof, a water diversion disc for partitioning is also required between the washing chamber and the drive motor in the axial direction, so that the washing pump must have a large enough volume to provide enough space for installing the washing impeller and the water diversion disc. With the increasing miniaturization and compactness of white household appliances, the traditional washing pump is difficult to meet the space requirement, and the use experience of customers is influenced.
Disclosure of Invention
The invention aims to provide a pump with small volume.
In order to achieve the purpose, the invention adopts the following technical scheme: a pump comprises a pump shell, a cavity, a liquid inlet and a liquid outlet, a stator assembly, a rotor assembly and a bearing, wherein the cavity is located in the pump shell, the liquid inlet and the liquid outlet penetrate through the pump shell in the radial direction and are communicated with the cavity, the stator assembly is accommodated in the cavity, the rotor assembly is accommodated in the cavity and matched with the stator assembly, the bearing is rotatably connected with the rotor assembly, the bearing is accommodated in the stator assembly, the pump shell is provided with a bottom wall located at the bottom of the cavity, the stator assembly is fixed on the bottom wall, the rotor assembly is provided with a rotor shell, a rotating shaft and at least two blades, the rotor shell covers the stator assembly from top to bottom, the rotating shaft is matched with the bearing in a rotating mode, the rotating shaft extends into the cavity from the periphery of the rotor shell.
As a further improved technical solution of the present invention, the rotor casing is provided with a top wall opposite to the bottom wall and an annular casing wall extending downward from a peripheral edge of the top wall, the at least two blades are arranged at equal intervals outside the annular casing wall, and each blade extends upward and downward along an axial direction.
As a further improved technical scheme of the present invention, the pump case is provided with an annular wall extending upward from the periphery of the bottom wall and an inner wall located inside the annular wall, the inner wall is provided with a liquid guiding wall connected with the annular wall, an extending wall extending continuously and annularly from the liquid guiding wall, and a tail end connected with the annular wall, and a distance between the inner wall and the annular wall gradually decreases from a starting end to the tail end of the extending wall.
As a further improved technical scheme of the present invention, the pump housing is further provided with a blocking wall extending from the annular wall to the chamber between the liquid outlet and the liquid inlet, and a terminal edge of the blocking wall is close to an edge of a circumference where the at least two blades are located.
As a further improved technical solution of the present invention, the blocking wall is provided with a fixed end fixed on the annular wall and the tail end extending from the fixed end, and the fixed end is disposed close to the liquid outlet.
As a further improved technical solution of the present invention, the stator assembly is provided with a first hole for accommodating the bearing and a first inner surface located in the first hole and abutting against the bearing, the bearing is provided with a second hole penetrating vertically, and the rotating shaft is accommodated in the second hole in an interference fit from top to bottom.
As a further improved technical solution of the present invention, the pump is further provided with a coating layer for fixing the stator assembly on the bottom wall of the pump casing, and the coating layer entirely coats the stator assembly but does not coat the first inner surface.
As a further improved technical scheme of the invention, the material of the coating layer is epoxy resin.
As a further improved technical solution of the present invention, the rotor housing is provided with a receiving cavity between the top wall and the annular housing wall, the rotating shaft extends downward from the top wall, and the stator assembly is received in the receiving cavity.
As a further improved technical solution of the present invention, the rotor assembly is provided with at least two receiving slots and magnetic steel fixed in the at least two receiving slots in a recessed manner inside the annular casing wall, each magnetic steel is correspondingly fixed in each receiving slot, and the magnetic steel is circumferentially arranged around the stator assembly.
As a further improved technical solution of the present invention, the pump case is further provided with a cylindrical boss protruding upward from the bottom wall, the stator assembly includes a stator core and at least two windings mounted on the stator core, the stator core is provided with a main body portion and at least two arm portions extending radially outward from an outer periphery of the main body portion, one of the windings is correspondingly wound on one of the arm portions and annularly arranged, and the at least two windings abut against an outer periphery of the cylindrical boss.
According to the technical scheme, the pump has the advantages that the rotor assembly is arranged externally, and the at least two blades are arranged on the periphery of the rotor assembly, so that the outer rotor is used for driving the at least two blades to rotate to achieve the effect of replacing an impeller, the height of the pump is reduced in the axial direction, the size of the pump is reduced, and the miniaturization development of the pump is realized.
Drawings
Fig. 1 is a perspective view of the pump of the present invention.
Fig. 2 is a partially exploded schematic view of the pump of the present invention.
Fig. 3 is an exploded perspective view of the pump of the present invention.
Fig. 4 is an exploded perspective view of the pump of the present invention from another angle.
Fig. 5 is a schematic perspective view of the lower cap of the pump of the present invention.
Fig. 6 is a schematic cross-sectional view of the pump of the present invention taken along line a-a of fig. 1.
Reference numerals: 100-a pump; 1-a pump casing; 10-a chamber; 101-liquid inlet; 102-a liquid outlet; 11-upper cover; 12-lower cover; 121-bottom wall; 122-an annular wall; 123-inner wall; 1231-a liquid conducting wall; 1232-an extended wall; 1233-terminus; 124-cylindrical boss; 125-a retaining wall; 1251-fixed end; 1252-terminus; 13-sealing ring; 14-a liquid inlet pipeline; 15-liquid outlet pipeline; 2-a rotor assembly; 20-a containing cavity; 21-a rotor shell; 211-top wall; 212-annular housing wall; 2120-a housing groove; 213-blade; 22-a rotating shaft; 23-magnetic steel; 3-a stator assembly; 31-a stator core; 310-a first aperture; 311-a body portion; 3101-a first inner surface; 312-arm part; 313-a boot portion; 32-winding; 4-a bearing; 40-a second well; 41-an inner surface; 42-an outer surface; 5-coating layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 6, the present invention discloses a pump 100, which includes a pump casing 1, a cavity 10 located in the pump casing 1, a liquid inlet 101 and a liquid outlet 102 radially penetrating the pump casing 1 and communicating with the cavity 10, wherein the pump 100 further includes a rotor assembly 2 accommodated in the cavity 10, a stator assembly 3 engaged with the rotor assembly 2, and a bearing 4. In the present embodiment, the pump 100 is an outer rotor drive pump.
The pump shell 1 comprises an upper cover 11, a lower cover 12 which is vertically matched with the upper cover 11, and a sealing ring 13 which is hermetically arranged at the matching position of the upper cover 11 and the lower cover 12. The lower cover 12 is provided with a bottom wall 121 and an annular wall 122 extending upward from the periphery of the bottom wall 121, and the chamber 10 is an annular chamber located between the bottom wall 121 and the annular wall 122 and having an upward opening.
Referring to fig. 2, 5 and 6, the pump casing 1 further has an inner wall 123 located inside the annular wall 122, the inner wall 123 extends upward from the bottom wall 121, the inner wall 123 has a liquid guiding wall 1231 connected to the annular wall 122, an extending wall 1232 extending continuously and annularly from the liquid guiding wall 1231, and a terminal 1233 connected to the annular wall 122, and a distance between the inner wall 123 and the annular wall 122 gradually decreases from a starting end of the extending wall 1232 to the terminal 1233. The lower cover 12 is further provided with a cylindrical boss 124 protruding upward from the bottom wall 121.
The lower cover 12 is further provided with a blocking wall 125 extending from the annular wall 122 into the chamber 10 between the liquid outlet 102 and the liquid inlet 101, the blocking wall 125 is provided with a fixed end 1251 fixed on the annular wall 122 and a terminal 1252 extending from the fixed end 1251, and the fixed end 1251 is close to the liquid outlet 102.
The pump 100 is further provided with a liquid inlet pipeline 14 and a liquid outlet pipeline 15, and the liquid inlet pipeline 14 and the liquid outlet pipeline 15 both extend outwards and radially from the annular wall 122 of the pump shell 1. The liquid inlet pipe 14 is in radial communication with the chamber 10 through the liquid inlet 101, and the liquid outlet pipe 15 is in radial communication with the chamber 10 through the liquid outlet 102. By the arrangement, liquid media enter from the liquid inlet 101 arranged in the radial direction and are discharged from the liquid outlet 102 arranged in the radial direction, the liquid inlet and the liquid outlet designed in the radial direction can be conveniently installed and assembled, and the height of the pump is reduced.
Referring to fig. 3 and 4, the stator assembly 3 includes a stator core 31 and a plurality of windings 32 mounted on the stator core 31. The stator core 31 has a main body 311, a first hole 310 vertically penetrating the main body 311, a plurality of arm portions 312 radially extending outward from the outer periphery of the main body 311, a shoe portion 313 at the tip of each arm portion 312, and a first inner surface 3101 in the first hole 310. Each of the windings 32 is sleeved on each of the arm portions 312 in a one-to-one correspondence manner and is annularly arranged around the main body portion 311. The body portion 311 is supported upward by the cylindrical boss 124, and the inner sides of the plurality of windings 32 abut against the outer periphery of the cylindrical boss 124.
The bearing 4 is provided with a second bore 40 concentric with the first bore 310, an inner surface 41 facing the second bore 40 and an outer surface 42 on the outside. The bearing 4 is fixedly mounted in the first bore 310 of the stator 3, and the outer surface 42 is in abutting engagement with the first inner surface 3101.
Referring to fig. 2 to 6, the rotor assembly 2 is disposed in a flat shape, and has a rotor housing 21 with a downward opening and covering the stator assembly 3 from top to bottom, a receiving cavity 20 located in the rotor housing 21, and a rotating shaft 22 extending downward from the rotor housing 21. The rotating shaft 22 is received in the second hole 40 in an interference fit manner. The rotor case 21 is provided with a top wall 211, an annular case wall 212 extending downward from the periphery of the top wall 211, and a plurality of blades 213 extending outward from the annular case wall 212. The plurality of blades 213 are arranged at equal intervals. In the present embodiment, "a plurality" represents at least two. The housing cavity 20 is located between the top wall 211 and the annular housing wall 212. The rotor assembly 2 is provided with a plurality of receiving grooves 2120 and a plurality of magnetic steels 23 fixed in the receiving grooves 2120 in a recessed manner inside the annular housing wall 212, each magnetic steel 23 is correspondingly fixed in each receiving groove 2120, and the plurality of magnetic steels 23 are arranged around the stator assembly 3 in a surrounding manner. The plurality of blades 213 are arranged around the outer circumference of the annular housing wall 212 and exposed to the chamber 10, and the end edge of the blocking wall 125 is close to the edge of the circumference where the plurality of blades 213 are located. So configured, when the liquid medium rotates with the blades 213 and the end of the single blade 213 is close to the blocking wall 125 to be substantially in a straight line, the blocking wall 125 blocks the liquid medium, so that the liquid medium is directly discharged from the liquid outlet 102 in a radial direction, thereby improving the liquid discharge capacity of the pump 100. In addition, a large cavity can be formed between the adjacent blades 213 and the inner wall 123, so that foreign matters with large particle sizes in the liquid medium can be easily discharged, and the foreign matter passing performance of the pump 100 is high.
In the invention, the rotor shell 21 surrounds the stator assembly 3 on the outer side, the stator assembly 3 is fixed in the accommodating cavity 20, a rotating magnetic field is formed after the stator assembly 3 is electrified, magnetic steel, namely permanent magnet magnetic poles, are embedded on the rotor shell 21, the magnetic poles are arranged alternately according to an N pole and an S pole, the magnetic poles rotate under the excitation action of the magnetic field, the rotor shell 21 rotates to drive the outer blades 213, and when the blades 213 rotate, the liquid in the pump shell 1 is extruded to move according to an Archimedes spiral line to form certain pressure to be discharged. In the present invention, the stator assembly 3 is vertically covered by the rotor housing 21, and the washing impeller is replaced by the blades 213 directly disposed at equal intervals on the outer circumference of the rotor housing 21, so that a shaft transmission mechanism is omitted, the space occupied by the pump 100 in the axial direction is greatly reduced, and the miniaturization of the pump 100 is facilitated.
The pump 100 is further provided with a coating layer 5 for integrally coating and fixing the stator assembly 3 on the bottom wall 121 of the pump housing 1, wherein the coating layer 5 entirely coats the outer surface of the stator assembly 3 exposed in the chamber 10, except that the first inner surface 3101 for abutting against the outer surface 42 of the bearing 4 is not covered with the coating layer 5. The arrangement is such that the stator assembly 3 is stably fixed to the bottom wall 121. The rotor case 21 covers the stator assembly 3 and the bearing 4 from the top down, and the clad 5 isolates the rotor case 21 from the stator assembly 3. The stator assembly 3 is matched with the winding through the cylindrical boss 124 in the horizontal direction to achieve primary limiting, and then the stator assembly 3 is fixed on the bottom wall 121 through the coating layer. The coating layer 5 is made of epoxy resin.
In the invention, the pump 100 encapsulates the stator assembly 3 by the coating layer 5 by using the whole epoxy resin, the epoxy resin encapsulating layer is directly contacted with a liquid medium during working, the stator winding 32 transfers heat to the epoxy resin, the epoxy resin dissipates heat of the stator assembly 3 by using the high thermal conductivity of the epoxy resin, and the stator assembly 3 is insulated and protected by the high insulativity and the high strength of the epoxy resin, so that the pump 100 has a good heat dissipation effect, and from another perspective, the pump 100 has a good heat dissipation effect, the heat load of the winding 32 can be properly relaxed, namely the wire diameter of the winding 32 of the stator assembly 3 can be reduced, thereby saving the using amount of copper.
Terms such as "upper," "lower," "left," "right," "front," "rear," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims. In addition, the descriptor "horizontal" as used herein is not entirely equivalent to allowing an angular tilt along a direction perpendicular to the direction of gravity.
In addition, the above embodiments are only used for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the invention in detail by referring to the above embodiments, the ordinary skilled in the art should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.
Claims (10)
1. A pump comprising a pump housing, a chamber within the pump housing, a fluid inlet and a fluid outlet extending radially through the pump housing and communicating with the chamber, a stator assembly received within the chamber, a rotor assembly received within the chamber and cooperating with the stator assembly, and a bearing rotatably coupled to the rotor assembly, the bearing being received within the stator assembly, the pump comprising: the pump shell is provided with a bottom wall positioned at the bottom of the cavity, the stator assembly is fixed on the bottom wall, the rotor assembly is provided with a rotor shell covering the stator assembly from top to bottom, a rotating shaft in rotating fit with the bearing and at least two blades extending into the cavity from the periphery of the rotor shell outwards, and the at least two blades are distributed on the periphery of the rotor shell along the radial direction; the rotor shell is provided with a top wall opposite to the bottom wall and an annular shell wall formed by extending downwards from the peripheral edge of the top wall, the at least two blades are arranged on the outer side of the annular shell wall at equal intervals, and each blade is formed by extending upwards and downwards along the axial direction.
2. The pump of claim 1, wherein: the pump shell is provided with an annular wall extending upwards from the periphery of the bottom wall and an inner wall located on the inner side of the annular wall, the inner wall is provided with a liquid guide wall connected with the annular wall, an extending wall extending continuously and annularly from the liquid guide wall and a tail end connected with the annular wall, and the distance between the inner wall and the annular wall is gradually reduced from the starting end of the extending wall to the tail end.
3. The pump of claim 2, wherein: the pump shell is also provided with a baffle wall extending from the annular wall to the cavity between the liquid outlet and the liquid inlet, and the edge of the tail end of the baffle wall is close to the edge of the circumference where the at least two blades are located.
4. The pump of claim 3, wherein: keep off the wall and be equipped with to be fixed stiff end on the annular wall reaches certainly the stiff end extends the end, the stiff end is close to the liquid outlet sets up.
5. The pump of claim 1, wherein: the stator assembly is provided with a first hole for accommodating the bearing and a first inner surface which is positioned in the first hole and abutted to the bearing, the bearing is provided with a second hole which penetrates through the bearing from top to bottom, and the rotating shaft is accommodated in the second hole in an interference fit manner from top to bottom.
6. The pump of claim 5, wherein: the pump is further provided with a coating layer for fixing the stator assembly on the bottom wall of the pump shell, and the coating layer integrally coats the stator assembly but does not coat the first inner surface.
7. The pump of claim 6, wherein: the coating layer is made of epoxy resin.
8. The pump of claim 1, wherein: the rotor shell is provided with a containing cavity located between the top wall and the annular shell wall, the rotating shaft extends downwards from the top wall, and the stator assembly is contained in the containing cavity.
9. The pump of claim 8, wherein: the rotor assembly is provided with at least two containing grooves and magnetic steel fixed in the at least two containing grooves in a concave mode on the inner side of the annular shell wall, each magnetic steel is correspondingly fixed in each containing groove, and the magnetic steel is arranged around the stator assembly in a surrounding mode.
10. The pump of claim 1, wherein: the pump case is further provided with a cylindrical boss protruding upwards from the bottom wall, the stator assembly comprises a stator core and at least two windings arranged on the stator core, the stator core is provided with a main body part and at least two arms extending outwards and radially from the periphery of the main body part, one winding is correspondingly wound on one arm and is annularly arranged, and the at least two windings are abutted against the periphery of the cylindrical boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710778432.9A CN109424553B (en) | 2017-09-01 | 2017-09-01 | Pump and method of operating the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710778432.9A CN109424553B (en) | 2017-09-01 | 2017-09-01 | Pump and method of operating the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109424553A CN109424553A (en) | 2019-03-05 |
| CN109424553B true CN109424553B (en) | 2021-04-06 |
Family
ID=65512739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710778432.9A Active CN109424553B (en) | 2017-09-01 | 2017-09-01 | Pump and method of operating the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109424553B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN214092344U (en) * | 2020-11-27 | 2021-08-31 | 瑞声光电科技(常州)有限公司 | Miniature water pump |
| CN214092345U (en) * | 2020-11-27 | 2021-08-31 | 瑞声光电科技(常州)有限公司 | Miniature water pump |
| CN112502994A (en) * | 2020-11-27 | 2021-03-16 | 瑞声新能源发展(常州)有限公司科教城分公司 | Miniature water pump and electronic equipment |
| CN214092346U (en) * | 2020-11-27 | 2021-08-31 | 瑞声光电科技(常州)有限公司 | Miniature water pump |
| CN114526243B (en) * | 2022-01-14 | 2024-04-12 | 西安理工大学 | Hub-driven fluid machine |
| CN114517982B (en) * | 2022-03-18 | 2023-02-17 | Tcl空调器(中山)有限公司 | Heat exchange system, control method of heat exchange system and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0070529A1 (en) * | 1981-07-17 | 1983-01-26 | Friedrich Schweinfurter | Regenerative pump |
| FR2669207A1 (en) * | 1990-11-15 | 1992-05-22 | Zanussi Elettrodomestici | Dishwasher in which the motor of the pump unit is reversible |
| CN102900698A (en) * | 2011-07-25 | 2013-01-30 | 日本电产三协株式会社 | Cascade pump device |
| JP2015083815A (en) * | 2013-10-25 | 2015-04-30 | 日本電産サンキョー株式会社 | Pump device |
| DE102015224814A1 (en) * | 2015-12-10 | 2017-06-14 | BSH Hausgeräte GmbH | Switching valve arrangement for a water-conducting household appliance and water-conducting household appliance |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005344563A (en) * | 2004-06-01 | 2005-12-15 | Toshiba Corp | Pump |
| NL1027499C1 (en) * | 2004-11-12 | 2006-05-15 | Barend Jacob Zuiddam | Fan and ventilation strip provided with such a fan. |
-
2017
- 2017-09-01 CN CN201710778432.9A patent/CN109424553B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0070529A1 (en) * | 1981-07-17 | 1983-01-26 | Friedrich Schweinfurter | Regenerative pump |
| FR2669207A1 (en) * | 1990-11-15 | 1992-05-22 | Zanussi Elettrodomestici | Dishwasher in which the motor of the pump unit is reversible |
| CN102900698A (en) * | 2011-07-25 | 2013-01-30 | 日本电产三协株式会社 | Cascade pump device |
| JP2015083815A (en) * | 2013-10-25 | 2015-04-30 | 日本電産サンキョー株式会社 | Pump device |
| DE102015224814A1 (en) * | 2015-12-10 | 2017-06-14 | BSH Hausgeräte GmbH | Switching valve arrangement for a water-conducting household appliance and water-conducting household appliance |
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| Publication number | Publication date |
|---|---|
| CN109424553A (en) | 2019-03-05 |
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