CN117432656A

CN117432656A - Washing pump and washing electric appliance with same

Info

Publication number: CN117432656A
Application number: CN202210854076.5A
Authority: CN
Inventors: 尹必行
Original assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2024-01-23

Abstract

The invention discloses a washing pump and a washing electric appliance with the same. The wash pump includes a pump housing assembly, an impeller, and a drive motor. The pump shell assembly comprises a pump cover, a first guide body and a second guide body which are sequentially arranged along the horizontal direction. There are impeller appearance chamber and first annular chamber in the first water conservancy diversion, and impeller appearance chamber both ends have installing port and water inlet, and first annular chamber encircles the water inlet setting, and first annular chamber has upstream annular wall, downstream annular wall, interior annular wall and outer annular wall, is equipped with on the upstream annular wall and holds the first import in chamber and intercommunication impeller appearance with the installing port relatively, is equipped with first export on the downstream annular wall. The pump cover is installed at the installation opening. The second fluid guide body defines a second annular cavity therein and communicates with the first outlet. The impeller is arranged in the impeller accommodating cavity. The transmission shaft of the driving motor is connected with the impeller. The washing pump provided by the embodiment of the invention is convenient to maintain and overhaul, is beneficial to reducing the height, reducing the overall size, improving the structural strength and reducing the working loss.

Description

Washing pump and washing electric appliance with same

Technical Field

The invention relates to the field of household appliances, in particular to a washing pump and a washing appliance with the same.

Background

The washing pump is a core component of a washing appliance such as a dish washer. Taking a dish washer as an example, the dish washer is driven by electricity, uses water or mixed washing liquid as a main medium, washes and dries household tableware such as bowls, dishes, cups, spoons and the like, and can be safely operated without professional training. The dishwasher has great advantages in the aspects of releasing hands, saving energy, protecting environment, washing, sterilizing and the like. With the increasing demands of people for quality of life, dish washers have become a necessity for households in the coming years.

The washing pump is a main power source of a circulating waterway in the whole dish-washing machine, and the performance index and the energy efficiency level of the washing pump directly influence the visual feelings of the dish-washing machine, such as washing efficiency, energy consumption, vibration noise and the like.

The washing pump disclosed in the prior art is unreasonable in design on the diffusion part, so that unsmooth flow guiding or great diffusion loss is caused, and a great part of pressure water head is consumed. Some washing pumps occupy a lot of space and are inconvenient to use and install.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a washing pump which can improve the operation efficiency in a limited space.

The invention also aims at providing a washing electric appliance with the washing pump.

A washing pump according to an embodiment of the present invention includes: the pump shell assembly comprises a pump cover, a first guide body and a second guide body which are sequentially arranged along the horizontal direction; the first guide body is internally provided with an impeller accommodating cavity and a first annular cavity, the horizontal two ends of the impeller accommodating cavity are respectively provided with a mounting opening and a water inlet, the first annular cavity is arranged around the water inlet, the axial two side walls of the first annular cavity are respectively an upstream annular wall and a downstream annular wall, the radial two side walls of the first annular cavity are respectively an inner annular wall and an outer annular wall, the upstream annular wall is provided with a first inlet which is opposite to the mounting opening and is communicated with the impeller accommodating cavity, and the downstream annular wall is provided with a first outlet; the pump cover is arranged at the mounting opening and provided with an assembly hole; a second annular cavity is defined in the second fluid guide body and is communicated with the first outlet; the impeller is arranged in the impeller accommodating cavity and is provided with a central inlet and a circumferential outlet, and the central inlet and the water inlet are arranged in the same direction; the driving motor is arranged on the pump cover, and a transmission shaft of the driving motor penetrates through the assembly hole and is connected with the impeller.

According to the washing pump provided by the embodiment of the invention, the pump shell component forms a horizontal structure with at least three sections, which is transverse, so that the washing pump is convenient to maintain and overhaul, and is beneficial to reducing the height. The structure limitation of the first guide body and the second guide body is utilized, so that the water outlet guide structure can be conveniently sleeved on the water inlet guide structure, the whole size can be reduced, and the structural strength is improved. The first annular cavity is arranged on the first current carrier, and particularly the upstream annular wall is arranged for blocking, so that the rapid pressure relief of water pressure at the circumferential outlet of the impeller can be avoided, and the acting loss is reduced.

In some embodiments, the first inlet and the first outlet are coaxial annular shapes, and an inner diameter of the first inlet is larger than an outer diameter of the first outlet.

Specifically, the inner diameter of the first outlet is larger than the diameter of the central inlet, the outer diameter of the first outlet is smaller than the diameter of the impeller, and the inner diameter of the first inlet is larger than the diameter of the impeller.

In some embodiments, the first fluid director is further provided with a vane within the first annular cavity, the vane extending helically around the inner annular wall.

Specifically, the upstream annular wall and the inner annular wall are integrally machined, the guide vane is fixedly connected with at least one of the upstream annular wall and the inner annular wall, and the guide vane is fixedly connected with at least one of the outer annular wall and the downstream annular wall.

Further, the axial length of the outer annular wall is larger than that of the inner annular wall, the outer annular wall is spliced with the pump cover, and the outer annular wall and the downstream annular wall are integrally processed.

In some embodiments, the impeller comprises: the hub is connected with the transmission shaft; the rear cover plate is connected with the hub; a front cover plate which is annular and is arranged around the axis of the hub, the front cover plate is positioned on the front side of the rear cover plate, an inner edge surrounding part of the front cover plate is formed into the central inlet, and the circumferential outlet is formed between the outer edge of the front cover plate and the outer edge of the rear cover plate; impeller blades connected between the front cover plate and the rear cover plate; at least one of the front surface of the front cover plate and the rear surface of the rear cover plate is provided with ribs extending along the radial direction.

Specifically, the ribs are perpendicular to the axis of the hub, or the ribs are spirally extended around the axis of the hub.

Further, when the rib is positioned on the front surface of the front cover plate, a gap between the rib and the upstream annular wall is 1-3mm;

When the ribs are positioned on the rear surface of the rear cover plate, the gap between the ribs and the pump cover is 1-3mm.

In some embodiments, the front cover plate includes: the front end pipe extends along the front-back direction, and the front end pipe orifice of the front end pipe is the central inlet; the front end of the reducing pipe is connected with the rear end of the front end pipe, and the diameter of the reducing pipe is gradually increased from front to back; the cone ring plate is arranged opposite to the rear cover plate, the inner edge of the cone ring plate is connected with the rear end of the reducer pipe, the circumferential outlet is formed between the outer edge of the cone ring plate and the outer edge of the rear cover plate, and the distance between the cone ring plate and the rear cover plate in the direction from inside to outside is gradually reduced so that the circumferential outlet is formed into a necking.

The inner annular wall and the upstream annular wall are connected through arc transition, and the front end of the front end pipe is positioned on the inner side of the inner annular wall.

Specifically, the inner annular wall surrounding area is an inflow guide channel so as to be opposite to the central inlet of the impeller;

the washing pump further includes: and the rectifying piece is arranged in the inflow guide channel.

In some embodiments, the second fluid director comprises: the pump inner pipe is connected with the inner annular wall at one end and is communicated with the water inlet; the pump outer tube, the pump outer tube cover is in the pump inner tube outside, the second annular chamber is located the pump inner tube with between the pump outer tube, the one end of pump outer tube with outer annular wall meets, the other end of pump outer tube with the pump inner tube links to each other in order to constitute the blind end.

Specifically, the washing pump further comprises a middle pipe arranged between the inner pump pipe and the outer pump pipe, the middle pipe is connected with the downstream annular wall, the second annular cavity is formed between the middle pipe and the inner pump pipe, a third annular cavity is formed between the middle pipe and the outer pump pipe, and the third annular cavity is communicated with the second annular cavity at one end far away from the first current-carrying body.

In some embodiments, the wash pump further comprises a heating element disposed at least within the second fluid guide.

The washing appliance comprises the washing pump.

According to the washing electric appliance provided by the embodiment of the invention, the internal structure layout is more convenient, the height is reduced, and the washing effect is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a cross-sectional view of a wash pump according to one embodiment of the invention;

FIG. 2 is an external view of a washing pump according to an embodiment of the present invention;

FIG. 3 is a schematic view showing an internal construction of a washing pump according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a flow-directing diffuser structure according to an embodiment of the present invention;

FIG. 5 is a schematic perspective view of a first flow conductor in one embodiment;

FIG. 6 is a perspective view of an impeller according to an embodiment of the present invention;

FIG. 7 is a side view of an impeller according to an embodiment of the present invention;

fig. 8 is a structural view of a washing appliance provided with a washing pump.

Reference numerals:

a washing pump 1000,

Drive motor 100, drive shaft 110,

Flow guiding and diffusing structure 200, central line L,

A first flow guide 210, a first annular chamber 211, a first inlet 212, a first outlet 213, an upstream annular wall 214, a downstream annular wall 215, an inner annular wall 216, an outer annular wall 217, guide vanes 218, an inlet guide passage 219,

An inner diameter phi 1 of the first outlet, an outer diameter phi 2 of the first outlet, an inner diameter phi 3 of the first inlet, an inner diameter phi 4 of the first inlet, a diameter phi 5 of the central inlet, a diameter phi 6 of the impeller,

The axial length E1 of the outer annular wall, the axial length E2 of the inner annular wall,

A second baffle 220, a second annular chamber 221, a second inlet 222, a second outlet 223, a third annular chamber 224, a third inlet 225, a third outlet 226, a downstream baffle 227,

A fairing 230, an upstream baffle 231,

Impeller 300, central inlet 301, circumferential outlet 302,

Hub 310,

A back cover plate 320,

Front cover plate 330, front end tube 331, reducer tube 332, conical ring plate 333,

Impeller blades 340,

Rib 350, front cover rib 351, rear cover rib 352,

Pump housing assembly 400, mounting port 401, water inlet 402, water outlet 403, mounting hole 409, impeller housing V1, pump inner tube 410, pump outer tube 420, intermediate tube 430, pump cover 440, water outlet tube 450,

A front wheel gap c1, a rear wheel gap c2,

A back flow direction p1, a front cover rib driving flow direction p2,

A heating element 600,

Washing the electric appliance A.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

A washing pump 1000 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

The washing pump 1000 according to an embodiment of the present invention, as shown in fig. 1 to 3, includes: a pump housing assembly 400, an impeller 300, and a drive motor 100. The pump case assembly 400 includes a pump cover 440, a first current collector 210, and a second current collector 220, which are sequentially disposed in a horizontal direction.

Referring to fig. 1 and 3, the first baffle 210 defines therein an impeller accommodating chamber V1 and a first annular chamber 211, the impeller accommodating chamber V1 being formed at horizontal both ends thereof with a mounting port 401 and a water inlet 402, respectively, and the first annular chamber 211 being disposed around the water inlet 402. Features defined herein as "first", "second" may include one or more such features, either explicitly or implicitly.

The two axial side walls of the first annular cavity 211 are an upstream annular wall 214 and a downstream annular wall 215 respectively, the two radial side walls of the first annular cavity 211 are an inner annular wall 216 and an outer annular wall 217 respectively, a first inlet 212 opposite to the mounting port 401 is arranged on the upstream annular wall 214, the first inlet 212 is communicated with the impeller accommodating cavity V1, and a first outlet 213 is arranged on the downstream annular wall 215. The pump cover 440 is installed at the installation opening 401, and the pump cover 440 is provided with an assembly hole 409. The second baffle 220 defines a second annular chamber 221 therein, the second annular chamber 221 being in communication with the first outlet 213.

The impeller 300 is arranged in the impeller accommodating cavity V1, the impeller 300 is provided with a central inlet 301 and a circumferential outlet 302, and the central inlet 301 and the water inlet 402 are arranged in the same direction. The driving motor 100 is mounted on the pump cover 440, and the driving shaft 110 of the driving motor 100 is penetrated at the assembly hole 409 and connected with the impeller 300.

That is, the entire washing pump 1000 has a horizontal structure, and the axis of the washing pump 1000 is disposed substantially in the horizontal direction. In this way, the overall height of the washing pump 1000 can be effectively controlled, which helps to reduce the overall height of the washing appliance a. Taking the washing appliance a shown in fig. 8 as an example of a dishwasher, the washing pump 1000 is disposed at the bottom of the dishwasher, and a pump, a pipe, a valve, etc. are required to be disposed in the bottom space. The washing pump 1000 adopts a horizontal structure, the height of the washing pump 1000 is reduced, and even if the horizontal area of the washing pump 1000 is increased, the washing pump can be reasonably arranged with surrounding pipelines and valves, so that the bottom space is not required to be excessively high, and the overall height of the washing electric appliance A can be reduced. The washing pump 1000 may pump water, washing liquid, or the like, and the washing pump 1000 pumps water will be described below for simplicity of explanation.

Here, the washing pump 1000 has the axis of the impeller 300 as the axis of the whole washing pump 1000, hereinafter referred to as a central axis L, which is also referred to as the axis of the impeller 300 or the axis of the hub 310 when referred to hereinafter. In the following description of the structures such as the first current collector 210 and the second current collector 220, the center line L is used to describe a part of the structure position, and the center line L is not limited to be circular in cross section, but may be nearly circular (such as ellipse, etc.).

And is described herein with the center line L disposed in the front-rear direction and the center inlet 301 of the impeller 300 located at the front end of the impeller 300 as a reference orientation in which the later-mentioned front-rear positional relationship is also defined. Of course, when the center line L is arranged in the left-right direction or in other directions, the positional relationship of the structures of each part of the impeller 300 still corresponds in the reference orientation when the center line L is arranged in the left-right direction or in other directions, and therefore, the reference orientation will be described hereinafter. The inner and outer directions referred to herein mean directions approaching the center line L are inward and directions departing from the center line L are outward in the radial direction of the impeller 300, and the inner edges of the structures referred to herein mean edges approaching the center line L and the outer edges of the structures mean edges departing from the center line L.

The terms "center," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like refer to an azimuth or positional relationship based on that shown in the drawings, merely to facilitate description of the invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular azimuth, be configured and operated in a particular azimuth, and thus should not be construed as limiting the invention.

In this application, the impeller 300 is connected to the driving motor 100, and the driving motor 100 drives the whole impeller 300 to rotate around the center line L. When the impeller 300 rotates, the water in the impeller 300 is pushed to rotate around the center line L, so that the water is centrifuged and is thrown from inside to outside in the radial direction. Since the central inlet 301 of the impeller 300 is located at the radially inner end of the impeller 300 and the circumferential outlet 302 of the impeller 300 is located at the radially outer end of the impeller 300, after the impeller 300 rotates, the pressure at the central inlet 301 drops and draws in more water and the pressure at the circumferential outlet 302 rises to drain outwardly.

Due to the continuous nature of the water flow, the front side of the impeller 300 is continuously drawn into the impeller 300 from the central inlet 301 and the water flow is continuously discharged from the circumferential outlet 302, the discharged water flow obtains velocity energy and pressure energy, and the impeller 300 performs work on the water flow, so that the wash pump 1000 has a certain head. Here, head refers to the increase in energy per unit weight of water flow from the inlet to the outlet of the pump.

Obviously, the flow velocity and direction of the water discharged from the circumferential outlet 302 are complex, both tangential flow component velocity rotating about the center line L and radial flow component velocity obtained by being discharged toward the circumferential outlet 302. And the water flow in the impeller 300 enters the central inlet 301 from front to back and is agitated by the rotating impeller 300, the water flow discharged from the circumferential outlet 302 also has an axial flow component velocity.

By providing the first annular chamber 211 downstream of the impeller receiving chamber V1 in this application, the first annular chamber 211 backside is separated from the impeller receiving chamber V1 by an upstream annular wall 214, and the first inlet 212 is located on the front side of the circumferential outlet 302 of the impeller 300. The impeller 300 rotates to expel the water flow from the circumferential outlet 302 and then through the first inlet 211 into the first annular chamber 211, where it is directed by the first annular chamber 211 to expel the water flow from the first outlet 213. Because of the obstruction of the upstream annular wall 214, the water flow discharged from the impeller 300 cannot directly pass through the upstream annular wall 214 to enter the first annular cavity 211 and needs to enter from the first inlet 212, so that rapid pressure relief at the circumferential outlet 302 can be avoided, and the water flow is led by the downstream first annular cavity 211 and the downstream second annular cavity 224 in turn to convert the speed energy into a pressure water head.

Due to the spacing of the upstream annular wall 214, a small forward wheel clearance c1 is formed between the front surface of the impeller 300 and the upstream annular wall 214, and the central inlet 301 and the circumferential outlet 302 of the impeller 300 cannot be directly communicated. Thus, the provision of the upstream annular wall 214 may effectively limit the backflow of water from the circumferential outlet 302 back to the central inlet 301 (the backflow direction is indicated by the arrow p1 in fig. 7). In this way, the work loss of the impeller 300 can be reduced.

Since the first inlet 211 is provided in the upstream annular wall 214, the flow medium exiting the circumferential outlet 302 of the impeller 300 can directly enter the first annular chamber 211 without bypassing.

The rear side of the first current-guiding body 210 is provided with the mounting opening 401, so that the impeller 300 can be conveniently mounted into the impeller accommodating cavity V1 from the mounting opening 401, the assembly convenience is improved, and the maintenance and the overhaul are convenient.

The first and second annular cavities 211, 221 are mostly located on the front side of the impeller 300 when the water inlet 401 is located on the front side of the impeller 300, which is defined by the positions of the first and second flow conductors 210, 220 in the present application. The water inlet side and the water outlet side of the impeller 300 are positioned on the same side of the impeller 300, and the water outlet guide structure can be sleeved on the water inlet guide structure, so that the overall size can be reduced, and the structural strength can be improved.

The first diversion body 210 can diversion water from the front end, and the water outlet direction of the second diversion body 220 can be flexibly set, for example, can be set at the side surface, and can realize the end inlet side outlet of the washing pump 1000, thereby being convenient for reducing the overall height of the washing pump 1000.

The pump housing assembly 400 is at least a three-piece construction in this application. The pump cover 440 is a first segment and the driving motor 100 is mounted on the pump cover 440, and when the pump cover 440 is detached, both the driving motor 100 and the impeller 300 can be detached together. The first current carrier 210 may generally form a second section and the second current carrier 220 may generally form a third section. The multi-section structure can be designed and processed according to sections during design, so that the tightness and the convenience of assembly are improved.

In some embodiments, the upstream first inlet 212 is adjacent the outer annular wall 217 and the downstream first outlet 213 is adjacent the inner annular wall 216, i.e., the first inlet 212 is relatively far from the centerline L, the first outlet 213 is relatively near from the centerline L, or the radial distance of the first inlet 212 from the centerline L is greater than the radial distance of the first outlet 213 from the centerline L. In comparing the radial distances of the first inlet 212 and the first outlet 213 from the center line L, the radial distances of the outer edge of the first inlet 212 and the outer edge of the first outlet 213 from the center line L are compared. When the outer edge is circular arc with its center on the center line L, the radial distance is equal to the radius of the circular arc. Otherwise, the radial distance refers to the distance between the point in the outer edge and the center line L.

The first annular cavity 211 has a first inlet 211 adjacent to the outer annular wall 217 and a first outlet 213 adjacent to the inner annular wall 216, which guides the water flow from the outside to the inside, and the water flow is contracted to the inside, so that the space of the first annular cavity 211 on the washing pump 1000 can fully utilize the radial distance difference between the central inlet 301 and the circumferential outlet 302 on the impeller 300, and the radial dimension of the washing pump 1000 is hardly increased by the arrangement of the first annular cavity 211, thereby being beneficial to reducing the occupied space of the first annular cavity 211.

It will be appreciated that the water flow exiting the outlet 302 at the periphery of the impeller 300 not only has a large radius of rotation, but also has a very large tangential and radial flow component. When the water flow flows into the first annular cavity 211, the rotation radius of the water flow is gradually contracted during the rotation around the inner annular arm 216, the tangential split speed and the radial flow split speed of the water flow are gradually reduced, at least the energy of the tangential split speed and the radial flow split speed of the water flow can be gradually converted into a pressure water head, and the first diversion body 210 has diversion and diffusion effects on the water flow. Since the tangential and radial speeds of the water flow are weakened, turbulence generated when the water flow flows in the downstream pipeline is reduced, and thus the flow consumption can be reduced.

Thus, the first flow guiding body 210 and the second flow guiding body 220 in the present application perform the flow guiding and diffusing functions, and the first flow guiding body 210 and the second flow guiding body 220 and the like form the flow guiding and diffusing structure 200 of the washing pump 1000. The flow guiding and diffusing structure 200 accords with the flow characteristics of the washing pump 1000, can convert the energy of water flow into a pressure water head more efficiently, and can enable the washing pump 1000 to generate higher lift in a smaller space, thereby improving the washing effect. The structure of the first current collector 210 is beneficial to reducing the occupied volume of the washing pump 1000, enabling the washing pump 1000 to have higher integration level, and being beneficial to optimizing the layout of the washing pump 1000 in the washing equipment.

Here, the specific structure of the first annular chamber 211 may be flexibly changed. For example, the first inlet 212 may be annular, and the center of the first inlet 212 is located on the center line L. For another example, the first inlet 212 may include a plurality of circular arc inlets, each circular arc inlet having a center located on the center line L. Also for example, the first inlet 212 may be irregularly curved, etc. Also, the first outlet 213 may be annular, and the center of the first outlet 213 is located on the center line L. For another example, the first outlet 213 may include a plurality of circular arc outlets, each circular arc outlet having a center located on the center line L. Also for example, the first outlet 213 may be irregularly curved, etc. Optionally, the first inlet 212 and the first outlet 213 are coaxially arranged in a ring shape.

In some embodiments, the first inlet 212 and the first outlet 213 are coaxial annular, as shown in fig. 4, the inner diameter Φ3 of the first inlet 212 is larger than the outer diameter Φ2 of the first outlet 213, so that the first inlet 212 and the first outlet 213 are not coincident in the axial direction, and water flow is difficult to pass directly to the first outlet 213 in the radial direction after entering from the first inlet 212, and needs to be contracted inwards in the axial direction under the guidance of the guide vane 218 to reduce speed energy.

Specifically, the inner diameter φ 1 of the first outlet 213 is greater than the diameter φ 5 of the central inlet 301, which provides room for the inner annular wall 216 to be positioned between the first annular chamber 211 and the impeller receptacle V1, thereby reducing assembly difficulty.

Further, the outer diameter Φ2 of the first outlet 213 is smaller than the diameter of the impeller 300, which further defines the radial space dimension of the impeller 300 for the first annular chamber 211, so that the water flow can shrink from outside to inside in the first annular chamber 211, thereby gradually reducing the tangential velocity energy of the water flow and the radial velocity energy of the water flow, so as to convert more pressure head.

Still further, the inner diameter φ 4 of the first inlet 212 is greater than the diameter φ 6 of the impeller 300. It will be appreciated that at the circumferential outlet 302 of the impeller 300, the water flow has a radial split from inside to outside, whereby the water flow may enter the first inlet 212 more smoothly, reducing excessive turbulent internal consumption at the inner edge of the first inlet 212.

Optionally, the inner annular wall 216 and the outer annular wall 217 are respectively circular tube-shaped and coaxially arranged, thereby reducing the processing difficulty.

Optionally, the upstream annular wall 214 and the downstream annular wall 215 are disposed parallel to each other, thereby reducing processing difficulty, and facilitating assembly with the impeller 300, reducing space occupation.

Further alternatively, the axes of the first inlet 212, the outer annular wall 217, the first outlet 213, and the inner annular wall 216 are all coincident with the center line L, the outer diameter Φ4 of the first inlet 212 is equal to the diameter of the outer annular wall 217, and the inner diameter Φ1 of the first outlet 213 is equal to the diameter of the inner annular wall 216.

Here, the outer diameter Φ4 of the first inlet 212 is equal to the diameter of the outer annular wall 217, such that the outer edge of the first inlet 212 is as large as possible on the first flow conductor 210, allowing the water flow discharged from the circumferential outlet 302 of the impeller 300 to enter the first inlet 212 directly during rotation, avoiding excessive turbulence at the outer edge of the first inlet 212.

The inner diameter phi 1 of the first outlet 213 is equal to the diameter of the inner annular wall 216, and the inner edge of the first outlet 213 is as small as possible on the first flow conductor 210, so that the tangential and radial split of the water flow can be reduced as much as possible, and excessive turbulence at the inner edge of the first outlet 213 is avoided.

This makes it possible to utilize the energy conversion capability of the first annular chamber 211 to the greatest extent possible, thereby improving the conversion efficiency.

In some embodiments, as shown in FIG. 3, the axial length E1 of the outer annular wall 217 is greater than the axial length E2 of the inner annular wall 216, the outer annular wall 217 is spliced with the pump cap 440, and the outer annular wall 217 is integrally machined with the downstream annular wall 215.

Therefore, no other pump shell structure is needed to be additionally arranged on the radial outer side of the impeller 300, and after the outer annular wall 217 and the downstream annular wall 215 are integrally processed, the impeller containing cavity V1 and the first annular cavity 211 can achieve good sealing effect except for an inlet and an outlet through splicing of the outer annular wall 217 and the pump cover 440, and the structure is compact.

In some embodiments, as shown in fig. 5, the first baffle 210 is further provided with a guide vane 218 in the first annular cavity 211, and the flow speed and direction of the water flow are affected under the guidance of the guide vane 218, so that the water flow can be smoothly discharged from the first outlet 213.

Specifically, vanes 218 are disposed in a helical extension around inner annular wall 216, i.e., vanes 218 are disposed in a helical extension around centerline L. It will be appreciated that, since the water flow has a tangential and radial split when exiting the circumferential outlet 302, the tangential and radial split of the water flow may be gradually reduced in the helical flow by the water flow spiraling along the vane 218 after entering the first annular chamber 211. Therefore, the stability of water flow energy conversion can be improved, the conversion efficiency is high, and the probability of generating turbulence in the conversion process is low.

Further, inlet angle α1 of guide vane 218 is less than outlet angle α2. The inlet angle α1 is set smaller in that the outlet angle of the discharge from the impeller 300 is smaller, facilitating the smooth entry of the water flow discharged from the impeller 300 into the first inlet 212. Whereas the water flow exiting from the first annular chamber 211 is directed substantially gradually in axial direction, the first outlet α2 is thus arranged larger, which is advantageous for directing the flow velocity of the water flow in axial direction. In some alternative implementations, the inlet angle α1 may be substantially equal to 12 ° and the outlet angle α2 of the vane 218 is selected to be 51 °.

Optionally, the vanes 218 are plural and circumferentially spaced apart. The plurality of guide vanes 218 can enhance the function, a single channel is formed between two adjacent guide vanes 218, and the plurality of guide vanes 218 form a plurality of single channels, so that the water flow entering the first annular cavity 211 can be divided into a plurality of strands, and the stranding work not only reduces the internal consumption caused by turbulence, but also is beneficial to stranding and guiding the speed energy of the water flow towards the direction converted into the pressure water head.

Further, the radial ends of the guide vanes 218 are respectively connected to the inner annular wall 216 and the outer annular wall 217, and the axial ends of the guide vanes 218 are respectively connected to the upstream annular wall 214 and the downstream annular wall 215. Such that the vanes 218 are able to completely separate the water flow on both sides, reducing turbulence created by the water flow streams on both sides of the vanes 218.

Of course, the vane 218 may have other shapes in the present application, such as being spaced apart from one of the inner annular wall 216, the outer annular wall 217, the upstream annular wall 214, and the downstream annular wall 215, and may also perform a certain supercharging function.

Optionally, the upstream annular wall 214 and the inner annular wall 216 are connected in a circular arc transition, such that the connection surfaces therebetween form circular arc guiding surfaces for guiding the water flow therein in the axial direction toward the first outlet 213.

Alternatively, the downstream annular wall 215 and the outer annular wall 217 are in transition with the circular arc such that the junction therebetween forms a circular arc shaped guide surface for guiding the water flow therein radially toward the first outlet 213.

Optionally, the outer edge of the first outlet 213 is tapered in diameter in the direction of flow of the water, so that a circular arc-shaped guide surface is formed therein, guiding the water flow toward the first outlet 213, reducing the probability of turbulence being generated therein.

In the present embodiment, the first current collector 210 needs to be assembled in consideration of the water impact problem.

For this reason, the upstream annular wall 214 and the inner annular wall 216 may be integrally formed in the present application, which may improve the reliability of the connection therebetween, and only one of them may be fixed in the pump housing assembly 400, so that the other may be fixed at the same time, thereby reducing the difficulty of fixing.

Specifically, vane 218 is fixedly connected to at least one of upstream annular wall 214 and inner annular wall 216, and vane 218 is fixedly connected to at least one of outer annular wall 217 and downstream annular wall 215. It will be appreciated that the outer and downstream annular walls 217, 215 may be fixedly mounted externally when the first current collector 210 is assembled, and even the outer and downstream annular walls 217, 215 may be integrally formed. At this time, the inner and outer structures of the first current collector 210 are fixed by the guide vane 218, and thus the fixing process can be reduced.

For example, in one alternative, the upstream annular wall 214 is integrally formed (e.g., integrally cast) with the inner annular wall 216, the outer annular wall 217 and the downstream annular wall 215 are integrally formed (e.g., integrally cast), the plurality of vanes 218 are fixedly attached (e.g., welded) to the inner annular wall 216, the outer annular wall 217 is finally slipped over the plurality of vanes 218, and the plurality of vanes 218 are fixedly attached (e.g., welded) to the outer annular wall 217. For example, in another alternative, the downstream annular wall 214, the downstream annular wall 215, the inner annular wall 216, the outer annular wall 217, and the guide vane 218 may be integrally formed directly by casting or the like, which may reduce the assembly process.

In some embodiments, the inner annular wall 216 surrounds the area of the inlet guide passage 219, one end of the inlet guide passage 219 defining the water inlet 401 and the other end being disposed opposite the central inlet 301 of the impeller 300. The surrounding area of the inner annular wall 216 is set as an inflow guide passage 219, the guide passage is formed by the structure of the first guide body 210, a volute is not required to be arranged for the impeller 300, the structural compactness of the washing pump 1000 is further improved, and water flows enter the impeller 300 through the inflow guide passage 219, so that the flow stability of the water before entering is improved.

Specifically, as shown in fig. 1, the flow guiding diffusion structure 200 further includes: and a rectifying member 230, the rectifying member 230 being provided in the inflow guide passage 219. Therefore, the water flow can be rectified before entering the impeller 300, the overlarge burden on the impeller 300 caused by the excessively complex water flow condition is avoided, the rotation stability of the impeller 300 can be improved and the abrasion is reduced under a more stable flow state.

Specifically, as shown in fig. 3, the fairing 230 includes a plurality of upstream baffles 231, and radially inner ends of the plurality of upstream baffles 231 are connected. Therefore, the rectifier 230 has a simple structure, can generate a better supporting effect on the first current collector 210, and improves the structural strength thereof.

In some embodiments, a second annular cavity 221 is defined in the second flow conductor 220 around the centerline L, and the second annular cavity 221 is flanked by a second inlet 222 and a second outlet 223, with the second inlet 222 communicating with the first outlet 213. The second annular chamber 221 is provided to sufficiently release the pressure head. The first annular chamber 211 and the second annular chamber 221 are each annular in shape and surround a channel, i.e., the inlet guide channel 219, for guiding the flow of water toward the central inlet 301 of the impeller 300.

Optionally, at least a section of the second annular chamber 221 increases in diameter gradually in a direction towards the second outlet 223. That is, there is a gradual transition of a segment in the second annular chamber 221. In the direction of water flow, the diameter of the gradual change section gradually increases, and the diameter of the corresponding inward flow guide channel 219 gradually decreases, so that the flow characteristics of water flow are met.

Specifically, as shown in fig. 3 and 4, the second conductive body 220 further defines a third annular cavity 224 therein, the third annular cavity 224 is sleeved on the radial outer side of the second annular cavity 221, one end of the third annular cavity 224 away from the first annular cavity 211 is a third inlet 225, and the third inlet 225 is communicated with the second annular cavity 221. Thus, the water flows around the second diversion body 220, and the pressure water head is further released. Moreover, due to the characteristics of the inlet and outlet positions of the first annular cavity 211, the radial dimension of the second annular cavity 221 is not too large, and the third annular cavity 224 is sleeved on the radial outer side of the second annular cavity 221, so that the overall dimension is smaller, the second annular cavity 221 and the third annular cavity 224 are limited in a smaller space, and the integration level of the washing pump 1000 is further improved.

Optionally, the end of the third annular cavity 224 adjacent to the first annular cavity 211 is a third outlet 226, and the third outlet 226 may be connected to a drain. Further, the water discharge direction of the third outlet 226 is perpendicular to the central axis L.

Further, the second annular chamber 221 and the third annular chamber 224 are connected through a circular arc transition, for example, as shown in fig. 4, and the cross section of the connection part of the second annular chamber 221 and the third annular chamber is semicircular, so that a large amount of water flow can be guided into the third annular chamber 224. The water flow probability turns 180 degrees, and the speed components in other directions of the water flow can be consumed as much as possible in the turning process and converted into axial flow speed and pressure water head.

Further, the second baffle 220 also includes a downstream baffle 227 disposed within the second annular chamber 221. The downstream baffle 227 is beneficial to increasing the flow stability of the water flow in the second annular chamber 221, and changing the direction of the water flow in the second annular chamber 221 to the axial flow as much as possible, thereby further reducing the radial flow split speed.

Optionally, the downstream baffle 227 is a straight plate disposed along the center line L, so that the downstream baffle 227 has no radial guiding function, and has a simple structure, which can improve the structural supporting function on the second baffle 220 and improve the structural strength.

In some embodiments, as shown in fig. 1, the second current carrier 220 includes: a pump inner tube 410 and a pump outer tube 420, one end of the pump inner tube 410 being connected to the inner annular wall 216 and communicating with the water inlet 402. The outer pump tube 420 is sleeved outside the inner pump tube 410, the second annular cavity 221 is located between the inner pump tube 410 and the outer pump tube 420, one end of the outer pump tube 420 is connected with the outer annular wall 217, and the other end of the outer pump tube 420 is connected with the inner pump tube 410 to form a closed end.

The space enclosed by the pump inner tube 410 is an extension of the inlet guide passage 219 or corresponds to another part of the inlet guide passage 219, so that both can be conveniently taken over when the outlet guide structure is sleeved with the inlet guide structure. The space between the pump inner tube 410 and the pump outer tube 420 is used for discharging water flow, as in fig. 1, the pump outer tube 420 is provided with a water outlet tube 450 at the third outlet 226, and the water outlet tube 450 ends with a water outlet 403 for taking over the water discharge.

Further, the second flow conductor 220 further includes an intermediate tube 430 disposed between the inner pump tube 410 and the outer pump tube 420, the intermediate tube 430 being positioned between the inner pump tube 410 and the outer pump tube 420, the intermediate tube 430 being connected to the downstream annular wall 215. The third annular chamber 224 communicates with the second annular chamber 221 at an end remote from the first flow conductor 210 for creating a return flow when the water flow is discharged. A second annular chamber 221 is defined between the intermediate tube 430 and the pump inner tube 410, a third annular chamber 224 is defined between the intermediate tube 430 and the pump outer tube 420, and a third outlet 226 is provided in the pump outer tube 420.

Alternatively, intermediate tube 430 may be connected to at least one of inner pump tube 410 and outer pump tube 420, for example, intermediate tube 430 may be connected to inner pump 410 via downstream baffle 227, and the three may be integrally formed.

Further alternatively, the intermediate pipe 430, the inner pump pipe 410 and the outer pump pipe 420 are integrally formed, so that the structural strength can be improved, and the fracture probability under the impact of water flow can be reduced.

In some embodiments, the wash pump 1000 further includes a heating member 600 so that the wash pump 1000 can discharge hot water. Alternatively, the heating element 600 may be disposed within the second annular chamber 221, or within the third annular chamber 224, with the heating element 600 disposed within the tube wall.

Specifically, the heating element 600 is disposed after the water flow is pressurized and stabilized, and the heating element 600 is disposed at least in the second current guide body 220.

Alternatively, the heating member 600 is a heating tube, which may include a plurality of sub-tubes arranged in parallel or a spiral tube having a uniform pitch. Therefore, the heating uniformity of the heating pipe can be improved, and the heating area of the heating pipe can be increased, so that the heating efficiency of the heating pipe can be improved.

Alternatively, the heating element 600 is a heating coil, and one turn of heating coil may be used as the heating coil, or a plurality of turns of heating coil may be used as the heating coil.

In the present embodiment, the impeller 300 is a centrifugal impeller, and the impeller 300 may be a straight blade type, a combined blade type, a semi-open type impeller, or the like. The impeller 300 has impeller blades 340, and the number of impeller blades 340 is practically adjustable, and may be selected from 4 to 8, for example.

In some embodiments, as shown in fig. 1, 6 and 7, the impeller 300 includes: hub 310, back cover plate 320, front cover plate 330, and impeller blades 340, impeller blades 340 being connected between front cover plate 330 and back cover plate 320.

Rear cover plate 320 is coupled to hub 310 and front cover plate 330 is positioned on the front side of rear cover plate 320. The front cover plate 330 is annular and disposed about the axis L of the hub 310, the inner peripheral surrounding portion of the front cover plate 330 being the central inlet 301 of the impeller 300, the outer edge of the front cover plate 330 and the outer edge of the rear cover plate 320 forming the peripheral outlet 302 of the impeller 300.

For ease of understanding, the structural feature definitions of the impeller 300 are named above in the reference orientations. The front cover plate 330 on the impeller 300 and the rear cover plate 320 are also referred to herein as "front surface" and "rear surface" are also defined in reference to the orientation.

Specifically, at least one of the front surface of the front cover plate 330 and the rear surface of the rear cover plate 320 is provided with ribs 350 extending in a radial direction. Wherein the ribs 350 on the front surface of the front cover 330 are referred to as front cover ribs 351, and the ribs 350 on the rear surface of the rear cover 320 are referred to as rear cover ribs 352.

When the rib 350 includes the front cover rib 351, since the front cover rib 351 is not circular any more, when the impeller 300 rotates, the front cover rib 351 pushes the fluid medium in the front gap c1 of the impeller to rotate around the axis L, so that the fluid medium is centrifuged and flicked radially from inside to outside. The pressure at the radially inner end of the front cover rib 351 is reduced and more fluid medium is sucked in the wheel front clearance c1, and the pressure at the radially outer end of the front cover rib 351 is increased to discharge the fluid medium outwards, the flow direction being shown as p2 in fig. 7. Due to the continuous nature of the fluid medium, the fluid medium on the front side of the impeller 300 is continuously sucked into the front wheel gap c1, and the fluid medium is continuously discharged from the outer end of the front wheel gap c1, and the discharged fluid medium also obtains velocity energy and pressure energy. The energy carried by this portion of the fluid medium is converted to a head of water and the fluid medium exiting the circumferential outlet 302 merges, increasing the effective head of the impeller 300.

Therefore, the front cover rib 351 is arranged to prevent leakage loss caused by backflow in the front wheel clearance c1, and the front cover rib 351 can apply work to fluid medium in the front wheel clearance c 1.

In addition, when the front cover rib 351 is provided on the impeller 300, the flow direction of the fluid medium on the front and rear surfaces of the front cover 330 is consistent when the impeller 300 rotates, and the fluid medium on the front and rear surfaces can generate backward pressure on the impeller 300 when flowing, so that the probability that the impeller 300 is stuck to the upstream annular wall 214 forward is reduced. If random backflow occurs at the wheel forward clearance c1, the impeller 300 is unbalanced in force. The agitation of the front cover rib 351 is more evenly distributed in the circumferential direction relative to the water flow without agitation, so that the acting force of the fluid medium on the impeller 300 in the front wheel gap c1 is also more evenly distributed in the circumferential direction, the probability of axial deflection of the impeller 300 during operation is reduced, and the probability of eccentric wear of the impeller 300 is reduced.

In this embodiment, the shape of the front cover rib 351 is not limited, and may be linear or curved.

When the front cover rib 351 is linear, the relative relationship between the front cover rib 351 and the axis L of the hub 310 may be flexibly set, and may be vertically set or alternatively set. In some embodiments, as shown in FIG. 3, the front cover rib 351 is perpendicular to the axis L of the hub 310, so that not only is the front cover rib 351 simple in structure and easy to machine, but the front cover rib 351 is radially disposed to define a shorter flow path. In some embodiments, the front cover rib 351 extends helically around the axis L of the hub 310, and is also effective to drive the flow of fluid medium. When the impeller blades 340 of the impeller 300 are also spirally arranged, the spiral directions of the front cover rib 351 and the impeller blades 340 may be the same or opposite, which is not limited herein.

Optionally, the front cover rib 351 is integrally formed on the front cover plate 330, so that the processing procedure can be reduced, and the structural strength of the joint between the front cover rib 351 and the front cover plate 330 is high, so that the front cover rib 351 can bear a large bending moment and is not easy to break. Of course, the present application does not exclude that the front cover rib 351 is fixed to the front cover 330 by welding or the like.

In the present application, the impeller blades 340 are multiple and the impeller blades 340 are distributed at intervals along the circumferential direction, so that the working capacity of the impeller 300 on the flowing medium is strong, the stress of the single impeller blade 340 is reduced, the single impeller blade 340 is not easy to bend, and the service life is long. The impeller blades 340 in the present application may adopt impeller blade structures disclosed in the prior art, and the shapes and the number of the impeller blades 340 are not limited herein.

Specifically, the number of the front cover ribs 351 is also plural, and the plural front cover ribs 351 are distributed at intervals along the circumferential direction, so that the working capacity of the front side of the impeller 300 on the flowing medium is also stronger, the stress of the single front cover rib 351 is reduced, the single front cover rib 351 is not easy to bend, and the service life is long.

Further, the front cover rib 351 is equal in number to the impeller blades 340, which is advantageous for more equalizing the internal and front side stresses of the impeller 300.

When the rear cover plate 320 has rear cover ribs 361 on the rear surface, the rear cover ribs 361 extend radially along the impeller 300. The arrangement of the rear cover rib 361 can further increase the stress balance of the impeller 300.

Specifically, as shown in FIG. 1 with the impeller 300 positioned within the pump housing assembly 400, the pump cover 440 is positioned on the rear side of the impeller 300. To avoid scraping the pump cover 440 when the impeller 300 rotates, the rear surface of the rear cover plate 320 is typically spaced apart from the pump cover 440 to form a wheel rear gap c2. Typically, the wheel-back gap c2 is also annular, and the pressure in the wheel-back gap c2 is greater at the radially outer end than at the radially inner end, and some of the fluid medium discharged from the circumferential outlet 302 may flow centrally along the wheel-back gap c2.

Because the rear cover rib 361 is no longer annular, when the impeller 300 rotates, the rear cover rib 361 pushes the fluid medium in the rear gap c2 of the impeller to rotate around the axis L, so that the fluid medium is centrifuged and is thrown radially from inside to outside. The pressure in the wheel rear clearance c2 decreases and draws more fluid medium in at the radially inner end of the rear cover rib 361, and the pressure at the radially outer end of the rear cover rib 361 increases to discharge the fluid medium radially outward, which also obtains velocity energy and pressure energy. The energy carried by this portion of the fluid medium can also be converted to a head of water and the fluid medium exiting the circumferential outlet 302 merges, increasing the effective head of the impeller 300. That is, the arrangement of the rear cover rib 361 in the present application prevents leakage loss caused by backflow in the rear wheel gap c2, and the rear cover rib 361 can apply work to the fluid medium in the rear wheel gap c 2. Therefore, the provision of the rear cover rib 361 can also reduce energy dissipation, improve the volumetric efficiency of the washing pump 1000, increase the drainage pressure, and make the impeller 300 generate a larger lift in a limited space.

When the rear cover rib 361 is arranged on the impeller 300, the fluid medium in the rear clearance c2 of the impeller can generate forward supporting force on the impeller 300 when flowing, so that the probability that the impeller 300 is attached to the pump cover 440 backwards is reduced. The stress of the impeller 300 is balanced in the circumferential direction, and the eccentric wear probability of the impeller 300 is reduced.

In addition, when the transmission shaft 110 is assembled to the pump housing assembly 400, a sealing structure is required to be provided at the assembly hole 409, and the assembly hole 409 may be filled with a material such as lubricating oil. By providing the rear cover rib 361 such that the radially inner end pressure of the wheel rear gap c2 is lower than the radially outer end, the problem of leakage caused by extrusion of the flowing medium into the fitting hole 409 is reduced, and contamination is also reduced.

In this embodiment, the shape of the rear rib 361 is not limited, and may be linear or curved.

When the rear cover rib 361 is linear, the relative relationship between the rear cover rib 361 and the axis L of the hub 310 may be flexibly set, and may be vertically set or alternatively set. In some embodiments, as shown in FIG. 4, the rear ribs 361 are perpendicular to the axis L of the hub 310, so that not only is the rear ribs 361 simple in structure and easy to machine, but the rear ribs 361 are radially arranged to define a shorter flow path. In some embodiments, the rear rib 361 extends spirally around the axis L of the hub 310, and is effective to drive the fluid medium.

When the impeller blades 340 of the impeller 300 are also spirally arranged, the spiral directions of the rear shroud 361 and the impeller blades 340 may be the same or opposite, which is not limited herein.

Optionally, the rear cover rib 361 is integrally formed on the rear cover plate 320, so that the processing procedure can be reduced, and the structural strength of the joint between the rear cover rib 361 and the rear cover plate 320 is high, so that the rear cover rib 361 can bear a large bending moment and is not easy to break. When the rear cover rib 361 and the rear cover 320 are integrally formed, they may be integrally formed by die casting, or the rear cover rib 361 may be formed by punching on the rear cover 320 when the rear cover 320 is processed, which is not limited herein. Of course, the present application does not exclude that the rear cover rib 361 is fixed to the rear cover 320 by welding or the like.

Further, the back plate 320 and the hub 310 are integrally formed, so that the back plate 320 and the hub 310 have high structural strength and high torque resistance at the joint.

Specifically, as shown in fig. 7, one end of the rear cover rib 361 is flush with the outer edge of the rear cover plate 320, that is, the radially outer end of the rear cover rib 361 extends to the circumferential outlet 302, so that the flowing medium in the wheel rear gap c2 is still acted on before converging with the flowing medium in the impeller 300.

Further, the other end of the rear cover rib 361 is connected to the hub 310, and the radially inner end of the rear cover rib 361 is disposed in a direction away from the central inlet 301. It will be appreciated that there is room within the pump housing assembly 400 for the hub 310, and therefore, the rear cover rib 361 is connected to the hub 310 to make full use of the space.

In this application, the arrangement of the front cover rib 351 and the rear cover rib 361 can further increase the structural strength.

In the present application, the number of the rear cover ribs 361 is plural, and the plural rear cover ribs 361 are distributed at intervals along the circumferential direction, so that the working capacity of the rear side of the impeller 300 to the flowing medium is also strong, the stress of the single rear cover rib 361 is reduced, the bending is not easy, and the service life is long.

Further, the rear cover ribs 361 are equal in number to the impeller blades 340, which is advantageous for more equalizing the internal and rear stresses of the impeller 300.

In some embodiments, when the ribs 350 are located on the front surface of the front cover plate 330, the gap between the front cover rib 351 and the upstream annular wall 214 is 1-3mm. The reasonable gap can avoid the front cover rib 351 from scraping the upstream annular wall 214, the flowing speed in the front wheel gap c1 is higher, the surface tension of the flowing medium can exert stronger bearing force, and stronger force balance effect is maintained.

When the ribs 350 are located on the rear surface of the back plate 320, the gap between the back plate ribs 352 and the pump cover 440 is 1-3mm. The reasonable gap can avoid the rear cover rib 361 from scraping the pump cover 440, and can maintain a relatively tension balance effect.

In some embodiments, as shown in fig. 1, 6 and 7, the front cover 330 includes: a front end tube 331, a reducer tube 332, and a cone ring plate 333. The front tube 331 is extended in the front-rear direction, and the front tube orifice of the front tube 331 is the center inlet 301. The front end of the reducer 332 is connected to the rear end of the front end tube 331, and the diameter of the reducer 332 gradually increases from front to rear. The cone ring plate 333 is arranged opposite to the back cover plate 320, the inner edge of the cone ring plate 333 is connected with the back end of the reducer 332, and a circumferential outlet 302 is arranged between the outer edge of the cone ring plate 333 and the outer edge of the back cover plate 320.

The front cover 330 is tubular at the front end, e.g., the front tube 331 may be a circular tube. This facilitates control of the clearance between the front cover plate 330 at the front end and the inner wall surface of the pump housing assembly 400 during assembly. Taking the example of fig. 1, the front tube 331 is inserted inside the inner annular wall 216. Thus, the gap between the outer peripheral surface of the front end tube 331 and the inner annular wall 216 also belongs to the wheel-front gap c1. So arranged, when the fluid medium flows into the inlet of the front wheel gap c1, the inner annular wall 216 and the front end pipe 331 can guide the fluid medium to flow along the axial direction, so that excessive turbulence is reduced when the fluid medium enters the front wheel gap c1. The same is true of the tubular shape of the front tube 331, and the shape of the front tube 331 guides the fluid medium to flow in the axial direction, reducing excessive turbulence when entering the central inlet 301.

In addition, the provision of the front end pipe 331 can effectively control the size of the gap between the front side surface of the impeller 300 and the inner wall surface of the pump housing assembly 400. At reasonable gap sizes, the fluid medium, after entering the wheel front gap c1, exerts pressure on the front surface of the impeller 300 by the surface tension of the fluid medium.

The conical ring plate 333 is shaped closer to the plate body, so that the conical ring plate is conveniently matched with the rear cover plate 320 to define the circumferential outlet 302, the circumferential outlet 302 is formed on the outer circumferential surface of the impeller 300, so that fluid medium can be discharged along the circumferential direction, and the overall acting force of the fluid medium on the impeller 300 is balanced in the circumferential direction during discharging.

The reducer 332 is provided in that it is a transition structure between the nose tube 331 and the cone-ring plate 33. By gradually increasing the diameter of the reducer 332 from front to back, the reducer 332 can guide the fluid medium to flow more smoothly, reduce the disturbance generated by the fluid medium during reversing, and reduce the flow resistance and power consumption.

Further, the inner annular wall 216 and the upstream annular wall 214 are connected through an arc transition, and the front end of the front end pipe 331 is located inside the inner annular wall 216. The gap size of the front wheel gap c1 at the reducing pipe 332 is uniform, and the water flow can be guided to flow at the inner wall and the outer wall of the reducing pipe, so that the local turbulence is less, and the flow is smoother.

Specifically, the distance between the cone ring plate 333 and the back cover plate 320 gradually decreases in the inside-to-outside direction so that the circumferential outlet 302 is formed as a constriction. In this way, the energy carried by the fluid medium can be converted into a greater head of water as it flows to the circumferential outlet 302 due to the elevated flow rate.

Further, the front end tube 331, the reducer 332 and the conical ring 333 are integrally formed, so that the front end tube 331, the reducer 332 and the conical ring 333 have high structural strength at the joint, relatively low internal stress, high pressure bearing capability, and difficult breakage and leakage.

Specifically, the front end tube 331 is a circular tube, the cross section of the reducer tube 332 is circular, and the cross section of the conical ring plate 333 is also circular. The cross section here refers to a cross section perpendicular to the axis L. The guiding and distributing of the flowing medium are balanced and the stress is even in all parts of the front cover plate 330 in the circumferential direction, which is beneficial to improving the rotation stability of the impeller 300.

In some embodiments, as shown in fig. 6, the front cover rib 351 is located on the front surface of the cone ring plate 333. The radially outer ends of the front cover ribs 351 are flush with the outer edge of the front cover plate 330, i.e., the radially outer ends of the front cover ribs 351 extend to the circumferential outlet 302, so that the flow medium in the wheel front clearance c1 is still subjected to work before converging with the flow medium in the impeller 300.

Reference is now made to the construction of a wash pump 1000 in one embodiment of FIGS. 1-3.

The washing pump 1000 has a horizontal structure as a whole and a three-stage structure.

The first section of the washing pump 1000 includes a pump cover 440 and a driving motor 100 and an impeller 300 installed at both sides of the pump cover 440 at the rearmost end, and the driving motor 100 and the impeller 300 can be simultaneously removed after the pump cover 440 is removed, thereby facilitating maintenance, observing a loss position, etc.

The second section of the wash pump 1000 is located on the front side of the first section and includes the first current carrier 210 and the fairings 230 mounted thereon. The first baffle 210 includes an upstream annular wall 214, a downstream annular wall 215, an inner annular wall 216, an outer annular wall 217, and a vane 218. The upstream annular wall 214, the downstream annular wall 215, the inner annular wall 216, and the outer annular wall 217 can enclose the first annular cavity 211, and the guide vane 218 is located in the first annular cavity 211 and connects the walls together. The space surrounded by the outer annular wall 217 is located behind the upstream annular wall 214 and is an impeller cavity V1, and when the pump cover 440 is mounted on the outer annular wall 217, the impeller 300 is mounted in the impeller cavity V1. Is located within the space enclosed by the inner annular wall 216.

The third section of the washing pump 1000 is located at the front side of the second section, and includes the second current carrier 220 and the heating member 600 mounted thereon, etc. The second current carrier 220 includes a pump inner tube 410, a pump outer tube 420, and a middle tube 430, forming the second annular chamber 221 and the third annular chamber 224, changing the direction of water flow, and the heating member 600 is mounted on the middle tube 430.

When the washing pump 1000 is assembled, the three sections are assembled in sequence, and the internal structure can be checked quickly after each section is separated.

When the washing pump 1000 works, the motor is directly connected to drive the impeller 300 to rotate at a high speed, negative pressure is generated at the front end of the impeller 300, and water flow is sucked in through the water inlet 402 due to water flow continuity and enters the impeller 300 after being rectified by the cross grid-shaped rectifying piece 230. Under the centrifugal force of the high-speed rotation of the impeller blades 340, the aqueous medium is thrown out by the impeller 300, and a certain speed water head is obtained. After being thrown out from the impeller 300, the water medium enters the first annular cavity 211, and under the diversion and diffusion effects of the guide vanes 218, the speed water head energy in the water medium is converted into the pressure water head required by the washing pump 1000 due to the law of conservation of energy. The water medium diffused by the guide vane 218 enters the second annular cavity 221 and the third annular cavity 224, is heated by the heating coil, increases the water temperature, and is finally discharged from the water outlet 403.

Compared with the existing washing pressure, the technical scheme of the invention has the advantage that the washing pressure is improved by 2.5 times, and a better washing effect can be obtained.

Compared with the existing washing pump, the technical scheme of the invention has the advantages that the efficiency is improved by 20%, the lower energy consumption brings lower use cost, and the energy is saved and the environment is protected.

The technical scheme of the invention adopts the integrated layout design of the impeller 300 and the guide vane 218, and the volume of the washing pump is reduced by 40% compared with the existing washing pump while the pump pressure is improved by 2.5 times.

A washing appliance a according to an embodiment of the present invention is described below with reference to fig. 1 to 8.

The washing electric appliance a is internally provided with a washing pump, which is the washing pump 1000 described in the above embodiment, and the structure of the washing pump 1000 will not be described again here.

According to the washing electric appliance A provided by the embodiment of the invention, by arranging the washing pump 1000, the washing pump 1000 has high volumetric efficiency, high drainage pressure and sufficient lift, and can generate a stronger washing effect.

Specifically, the washing appliance a may be a dishwasher, a washing machine, or the like, or may be other devices that require the provision of the washing pump 1000, which is not limited herein. The washing electric appliance A has good integral washing effect and long service life.

In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wash pump, comprising:

the pump shell assembly comprises a pump cover, a first guide body and a second guide body which are sequentially arranged along the horizontal direction; the first guide body is internally provided with an impeller accommodating cavity and a first annular cavity, the horizontal two ends of the impeller accommodating cavity are respectively provided with a mounting opening and a water inlet, the first annular cavity is arranged around the water inlet, the axial two side walls of the first annular cavity are respectively an upstream annular wall and a downstream annular wall, the radial two side walls of the first annular cavity are respectively an inner annular wall and an outer annular wall, the upstream annular wall is provided with a first inlet which is opposite to the mounting opening and is communicated with the impeller accommodating cavity, and the downstream annular wall is provided with a first outlet; the pump cover is arranged at the mounting opening and provided with an assembly hole; a second annular cavity is defined in the second fluid guide body and is communicated with the first outlet;

The impeller is arranged in the impeller accommodating cavity and is provided with a central inlet and a circumferential outlet, and the central inlet and the water inlet are arranged in the same direction;

the driving motor is arranged on the pump cover, and a transmission shaft of the driving motor penetrates through the assembly hole and is connected with the impeller.

2. The wash pump of claim 1 wherein the first inlet and the first outlet are concentric annular shapes, the first inlet having an inner diameter greater than an outer diameter of the first outlet.

3. The wash pump of claim 2 wherein the first outlet has an inner diameter greater than the diameter of the central inlet, the first outlet has an outer diameter less than the diameter of the impeller, and the first inlet has an inner diameter greater than the diameter of the impeller.

4. The washing pump of claim 1 wherein said first fluid director is further provided with a vane within said first annular chamber, said vane extending helically around said inner annular wall.

5. The washing pump as claimed in claim 4 wherein said upstream annular wall is integrally formed with said inner annular wall, said vane is fixedly connected to at least one of said upstream annular wall and said inner annular wall, and said vane is fixedly connected to at least one of said outer annular wall and said downstream annular wall.

6. The wash pump of claim 1 wherein the outer annular wall has an axial length greater than the axial length of the inner annular wall, the outer annular wall being spliced with the pump cap, the outer annular wall being integrally machined with the downstream annular wall.

7. The wash pump of claim 1, wherein the impeller comprises:

the hub is connected with the transmission shaft;

the rear cover plate is connected with the hub;

a front cover plate which is annular and is arranged around the axis of the hub, the front cover plate is positioned on the front side of the rear cover plate, an inner edge surrounding part of the front cover plate is formed into the central inlet, and the circumferential outlet is formed between the outer edge of the front cover plate and the outer edge of the rear cover plate;

impeller blades connected between the front cover plate and the rear cover plate;

at least one of the front surface of the front cover plate and the rear surface of the rear cover plate is provided with ribs extending along the radial direction.

8. The washing pump as claimed in claim 7 wherein said ribs are perpendicular to the axis of said hub or said ribs extend helically about the axis of said hub.

9. The washer pump of claim 7, wherein a gap between the ribs and the upstream annular wall is 1-3mm when the ribs are located on the front surface of the front cover plate;

10. The wash pump of claim 7 wherein the front cover plate comprises:

the front end pipe extends along the front-back direction, and the front end pipe orifice of the front end pipe is the central inlet;

the front end of the reducing pipe is connected with the rear end of the front end pipe, and the diameter of the reducing pipe is gradually increased from front to back;

the cone ring plate is arranged opposite to the rear cover plate, the inner edge of the cone ring plate is connected with the rear end of the reducer pipe, the circumferential outlet is arranged between the outer edge of the cone ring plate and the outer edge of the rear cover plate, and the distance between the cone ring plate and the rear cover plate in the direction from inside to outside is gradually reduced so that the circumferential outlet is formed into a necking;

11. The wash pump of claim 1 wherein said inner annular wall surrounding area is an inflow guide channel to be disposed directly opposite a central inlet of said impeller;

12. The wash pump of claim 1 wherein the second flow conductor comprises:

the pump inner pipe is connected with the inner annular wall at one end and is communicated with the water inlet;

the pump outer tube, the pump outer tube cover is in the pump inner tube outside, the second annular chamber is located the pump inner tube with between the pump outer tube, the one end of pump outer tube with outer annular wall meets, the other end of pump outer tube with the pump inner tube links to each other in order to constitute the blind end.

13. The wash pump of claim 12 further comprising an intermediate tube disposed between the inner and outer pump tubes, the intermediate tube being contiguous with the downstream annular wall, the intermediate tube forming the second annular chamber with the inner pump tube, the intermediate tube forming a third annular chamber with the outer pump tube, the third annular chamber communicating with the second annular chamber at an end remote from the first flow conductor.

14. The washer pump of claims 1-13, further comprising a heating element disposed at least within the second fluid guide.

15. A washing appliance comprising a washing pump according to any one of claims 1-14.