CN117905730A - Drainage pump shell, pump shell assembly and washing pump and washing electrical appliance with same - Google Patents

Abstract

The invention discloses a drainage pump shell, a pump shell assembly, a washing pump with the drainage pump shell and a washing electric appliance. The drainage pump shell is internally provided with a water inlet drainage cavity, the outer circumferential surface of the water inlet drainage cavity is a drainage cavity circumferential surface, a pump suction inlet is formed on the drainage cavity circumferential surface, and the two axial ends of the drainage cavity circumferential surface are respectively a first end and a second end. The drainage pump shell is provided with a drainage boss at the first end, the section of the drainage boss in the direction perpendicular to the axis of the water inlet drainage cavity is a boss section, and the outer contour area of the boss section is gradually reduced in the direction towards the second end. The second end of the drainage pump shell is provided with a mounting port communicated with the water inlet drainage cavity, and the mounting port is used for being connected with a main pump shell of the washing pump. According to the drainage pump shell provided by the embodiment of the invention, the whole size is not required to be excessively large, so that the washing pump can obtain higher flow efficiency, and vibration and noise during operation are reduced.

Description

Drainage pump shell, pump shell assembly and washing pump and washing electrical appliance with same

Technical Field

The invention relates to the technical field of washing appliances, in particular to a drainage pump shell, a pump shell assembly, a washing pump with the drainage pump shell and a washing appliance.

Background

The washing pump is a core component of the washing electric appliance. Taking a dish washer and a washing machine as examples, the washing pump takes charge of the power source of the whole circulating waterway, and the performance index and the energy efficiency level of the washing pump directly influence the visual feelings of the washing efficiency, the energy consumption, the vibration noise and the like of the dish washer and the washing machine.

On washing pumps in real life, a pump inlet is positioned at one axial end of an impeller, and water flows into the impeller along the axial direction. The overall axial dimension of the washing pump is very large, which can cause the washing appliance to be too wide if the washing pump is transversely arranged at the bottom of the washing appliance, and can cause the washing appliance to be too wide if the washing pump is vertically arranged to avoid the inner cavity of the washing appliance. In some washing pumps, a pump intake is provided on the side of the washing pump, and the water flows into the washing pump in the radial direction, turns 90 degrees, and flows to the impeller. This results in water flow entering the impeller with swirl flow, flow confusion, impact loss, high vibration noise, and low efficiency.

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 the drainage pump shell of the washing pump, and the drainage pump shell is used for guiding water flow to the impeller so as to reduce impact loss of the water flow in the washing pump, so that the water flow entering the impeller is more stable, and the working stability of the washing pump is improved.

The present invention is also directed to a pump housing assembly for a washing pump having the above-described drain pump housing.

The present invention is also directed to a washing pump having the pump housing assembly described above.

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

According to the drainage pump shell of the washing pump, the water inlet drainage cavity is formed in the drainage pump shell, the outer peripheral surface of the water inlet drainage cavity is a drainage cavity peripheral surface, a pump suction inlet is formed in the drainage cavity peripheral surface, and two axial ends of the drainage cavity peripheral surface are respectively a first end and a second end. The drainage pump shell is provided with a drainage boss at the first end, the section of the drainage boss in the direction perpendicular to the axis of the water inlet drainage cavity is a boss section, and the outer contour area of the boss section is gradually reduced in the direction towards the second end. The drainage pump shell is provided with a mounting port communicated with the water inlet drainage cavity at the second end, and the mounting port is used for being connected with a main pump shell of the washing pump.

According to the drainage pump shell of the washing pump, the drainage boss is arranged in the drainage pump shell, so that water flow can be split after entering the drainage pump shell and flows along the drainage boss and the peripheral surface of the drainage cavity, the washing pump obtains stable inflow conditions, and the water flow is guided to the impeller along the axial direction as much as possible. The drainage boss limits the flow area of water flow, avoids rapid drop of the flow speed of water flow and rapid rise of water pressure, and ensures that the flow condition of water flow is stable in the guided process. The two flows meet after the water flow is split, the impact forces of the two flows can be mutually offset, and the two flows are mutually extruded to be beneficial to eliminating rotational flow generated when the flow is converted, so that the integral vibration of the drainage pump shell is reduced, and the noise is reduced. The water flow is guided by the peripheral surface of the guide cavity and the guide boss, has a certain flowing distance to turn, and the flowing state tends to be stable in flowing, so that the impact loss is reduced, the rotational flow is reduced before the water flow enters the impeller, and the impeller is more stable in rotation. The overall size of the drainage pump shell is not required to be too large, so that the washing pump can obtain higher flow efficiency, and vibration and noise during operation are reduced.

In some embodiments, the drainage boss is a solid of revolution, the drainage cavity circumferential surface is a cylindrical surface, and the drainage boss is coaxially arranged with the drainage cavity circumferential surface.

Specifically, the end part of the drainage boss is a spherical crown surface protruding towards the mounting opening.

Further, the cross section of the drainage boss passing through the axis of the drainage boss is two symmetrical drainage curves, and each drainage curve comprises: the inner convex arc line segments and the outer convex arc line segments are connected, the outer convex arc line segments of the two drainage curves are connected at one end close to the mounting opening, and the inner convex arc line segments of the two drainage curves are arc line segments protruding towards the axis direction.

In some embodiments, a tongue-separating protrusion is provided on the peripheral surface of the cavity, and the tongue-separating protrusion is spaced from the pump intake.

Specifically, the tongue-separating lug extends along the direction parallel to the axis of the water inlet guide cavity, and the tongue-separating lug is arranged opposite to the pump suction port.

Further, the direction of the axis of the water inlet guide cavity is the height direction, and the height of the drainage boss is at least half of the height of the water inlet guide cavity.

A pump housing assembly of a washing pump according to an embodiment of the present invention includes: the impeller comprises a main pump shell, wherein an impeller cavity is defined in the main pump shell, one end of the main pump shell is provided with an inner inlet, and the impeller cavity is used for installing an impeller and enabling the water inlet end of the impeller to be arranged towards the inner inlet; the drainage pump casing is the drainage pump casing of the washing pump according to any embodiment, and an installation opening of the drainage pump casing is connected with the inner inlet.

According to the pump shell assembly of the washing pump, water flows through the drainage pump shell, flows into the impeller in the impeller cavity of the main pump shell through the inner inlet after being drained, so that water flowing in the radial direction is converted into water flowing in the axial direction, and rotational flow is reduced. Therefore, hydraulic loss can be reduced, the effects of the impeller and the washing pump can be improved, and vibration noise can be reduced.

Specifically, the inner inlet is towards the edge line of one end of the water inlet guide cavity, the end part of the drainage boss forms an inner conical cavity, the cross-sectional area of the inner conical cavity passing through the axis of the drainage boss is E1, the cross-sectional area of the pump inlet in the direction perpendicular to the axis of the pump inlet is E2, half of the cross-sectional area E2 is E3, and the following conditions are satisfied: e1 is within 90% -110% of E3.

In some embodiments, one end face of the main pump housing is an auxiliary guiding end face, the inner inlet is arranged on the auxiliary guiding end face, and the auxiliary guiding end face is positioned in the mounting opening. The auxiliary guiding end face is annular and is a curved surface, and extends towards the first end of the guiding cavity peripheral face along the radial inward direction.

Optionally, in a direction from the first end to the second end, the inner inlet is a straight port with a constant cross-sectional area, or the inner inlet is a flaring with a gradually increasing cross-sectional area, or the inner inlet is a necking with a gradually decreasing cross-sectional area.

In some embodiments, the pump housing assembly further includes a fairing rib disposed within the inner inlet. The arrangement of the rectifying ribs can further eliminate radial rotational flow entering the inner inlet.

The washing pump comprises the pump shell assembly of the washing pump and an impeller, wherein the impeller is arranged in an impeller cavity of a main pump shell of the pump shell assembly.

According to the washing pump provided by the embodiment of the invention, by arranging the pump shell assembly of the washing pump of any embodiment, the flow of water flow in the washing pump is smoother, the driving effect of the pump shell assembly on the water flow can be improved, and meanwhile, the vibration generated by the operation of the pump shell assembly is reduced. Thereby improving the cleaning effect of the washing pump through the water flow and reducing the vibration of the washing pump during operation.

In some embodiments, the wash pump further comprises: the heater is arranged in the water inlet guide cavity, and at least part of the heater is arranged around the guide boss. Thereby, the water flow can be heated before the water is fed.

The washing appliance according to the embodiment of the invention comprises the washing pump according to any one of the embodiments.

According to the washing electric appliance provided by the embodiment of the invention, by arranging the washing pump of any embodiment, the flow of water flow in the washing pump is smoother, the driving effect of the pump shell assembly on the water flow can be improved, and meanwhile, the vibration generated by the operation of the pump shell assembly is reduced. Thereby improving the cleaning effect of the washing electric appliance through the water flow and reducing the vibration during the working.

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 perspective view of a drainage pump casing of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the flow-through pump housing of an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a pump housing of an embodiment of the present invention taken perpendicular to the axis;

FIG. 4 is a schematic cross-sectional view of a pump housing of another embodiment of the present invention taken perpendicular to the axis;

fig. 5 is a schematic structural view of a main pump housing of a washing pump according to an embodiment of the present invention;

Fig. 6 is a schematic structural view of a washing pump according to an embodiment of the present invention;

Fig. 7 is a structural view of a washing appliance provided with a washing pump.

Reference numerals:

Washing electric appliance A, washing pump B,

Pump housing assembly 1000, axis L of the pump housing assembly,

A drainage pump casing 100,

The water inlet drainage cavity 10, the upper drainage channel 101, the lower drainage channel 102, the drainage cavity peripheral surface S1, the drainage cavity end surface S2, the mounting opening 13, the pump inlet 14, the first end p1, the second end p2, the inner conical cavity 11, the axis L1 of the water inlet drainage cavity, the axis L2 of the pump inlet,

A drainage boss 16, a boss section S5, an outer contour n1 of the boss section, a drainage curve m0, an inner convex arc line segment m1, an outer convex arc line segment m2,

A tongue-separating lug 17,

Main pump housing 200, impeller chamber 210, inner inlet 220, edge line n2,

Auxiliary leading end face S3, rectifying rib 250,

Impeller 300, water inlet 301,

Heater 600, drive motor 700.

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.

In the description of the present invention, it should be understood that the terms "center," "vertical," "transverse," "length," "left," "right," "inner," "outer," "axial," "radial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

A drainage pump casing 100 of a washing pump according to an embodiment of the present invention is described below with reference to the accompanying drawings.

The drain pump housing 100 is a part of the pump housing assembly 1000 of the washing appliance a, and the drain pump housing 100 is connected to an input end of the main pump housing 200. A water intake guide chamber 10 is formed in the guide pump housing 100, and the water intake guide chamber 10 has a mounting port 13 and a pump intake port 14.

As shown in fig. 6, the drainage pump housing 100 serves to guide the inflow liquid into the main pump housing 200 after being diverted. It will be appreciated that the liquid pumped by the wash pump is typically water or an aqueous solution, but may be other anhydrous liquids, and for simplicity of illustration, the wash pump will be described below as being used to pump a water stream. When the washing pump is installed in the apparatus to perform water flow driving, since the volume of the apparatus is limited and the installation space provided for the washing pump is also limited, the water flow faces a turning problem in such a small space. If the water flow steering is not smooth enough, too severe rotational flow is generated, so that not only is the water flow resistance increased and the energy consumption of the washing pump is overlarge, but also the rotational flow is excessively harmful to the impact of the impeller, and the service life of the impeller is reduced.

In order to solve the above problems, the present application proposes a drainage pump casing 100 that makes the diversion of the water flow smoother when the water flow is introduced into a main pump casing 200 equipped with an impeller 300.

Referring to fig. 1 and 3, the outer peripheral surface of the intake guide chamber 10 is a guide chamber peripheral surface S1, and a pump intake port 14 is formed in the guide chamber peripheral surface S1. The two axial ends of the cavity guiding peripheral surface S1 are respectively a first end p1 and a second end p2. The drainage pump housing 100 is provided with a mounting opening 13 at the second end p2 for communicating with the water inlet drainage chamber 10, the mounting opening 13 being adapted to be connected to the main pump housing 200 of the washing pump B. Thus, the water flow can enter the water intake guide chamber 10 through the pump intake port 14, and the water flow installation port 13 flows from the water intake guide chamber 10 into the main pump case 200 after turning.

As shown in fig. 2 and 3, the drainage pump housing 100 is provided with a drainage boss 16 at the first end p1, the section of the drainage boss 16 in the direction perpendicular to the axis L1 of the water inlet guide chamber 10 is a boss section S5, and the outer contour area of the boss section S5 gradually decreases in the direction toward the second end p 2. As shown in fig. 3, the outer contour area of the boss section S5 refers to the area surrounded by the outer contour n1 of the boss section S5. Note that, the direction of the axis L1 of the water intake guide chamber 10 is mentioned here, and the shape of the water intake guide chamber 10 is not limited. Since the water intake guide chamber 10 functions to divert the water flow to the second end p2 in the axial direction and thus to the impeller 300 in the axial direction, the direction of the axis L1 of the water intake guide chamber 10 refers to the direction from the first end p1 to the second end p 2.

To understand the function of the drainage boss 16, this is further described herein with reference to the orientation of the embodiment of fig. 1-3. As shown in fig. 1 to 3, the drainage pump casing 100 is disposed in the front-rear direction, the first end p1 is a front end, the second end p2 is a rear end, the pump intake 14 is located on the left side of the drainage pump casing 100, and the rear end of the drainage pump casing 100 is provided with the mounting opening 13 and is connected to the main pump casing 200. At this time, the drainage pump housing 100 serves to guide the water flowing in from the left side rearward, turning the water flow by 90 degrees.

If the drainage boss 16 is not provided in the drainage pump case 100, the water flows from the left and then flows toward the right segment of the drainage cavity peripheral surface S1. During the rightward flow, although some water flows backward under the drive of water pressure, a large amount of water flows impact the guide chamber circumferential surface S1 rightward. The impact force of the water flow is large, and the impact force also fluctuates to a certain extent, so that large vibration and noise are generated in the whole drainage pump shell 100. And the water flow can generate a certain rotational flow when turning, the rotational flow is unfavorable for the stable operation of the impeller 300, and vibration and noise are unavoidable in the operation.

In the scheme of the application, after the drainage boss 16 is arranged, multiple guiding effects can be generated on water flow steering:

First, since the outer contour area of the boss section S5 gradually decreases in a direction toward the second end p2, i.e., the drainage boss 16 gradually tapers from front to back, the outer surface of the drainage boss 16 corresponds to a kind of guide surface. After a part of the water flow (flow direction is shown as a1 in fig. 1 and 2) flowing into the pump inlet 14 is directly rushed towards the drainage boss 16, the drainage boss 16 can guide the part of the water flow to flow backwards, so that the water flow can flow along the drainage boss 16 to the mounting port 13 (flow direction is shown as a2 in fig. 2), and the water flow can flow into the impeller 300 in the main pump casing 200 in the axial direction.

The water flow (flow direction shown as a1 in fig. 1 and 2) flowing into the pump intake 14 is largely split into two by the flow guide boss 16. An upper drainage channel 101 is formed between the drainage boss 16 and the upper section of the drainage cavity peripheral surface S1, and a lower drainage channel 102 is formed between the drainage boss 16 and the lower section of the drainage cavity peripheral surface S1. After the partial water flow is split upwards, the partial water flow flows rightward through the upper drainage channel 101 (the flow direction is shown as a3 in fig. 2 and 3). After being split down, a portion of the water flows rightward through the down-flow channel 102 (flow direction is shown as a4 in fig. 2 and 3). After the two streams are split, the impact force on the drainage pump housing 100 to the right is reduced. When the two water flows meet, the impact forces are opposite in direction, so that a part of the impact forces can be offset, and the impact force on the drainage pump casing 100 in the up-down direction is small. Therefore, compared with the scheme without the drainage boss 16, the scheme of the application can greatly reduce the vibration and noise of the drainage pump shell 100.

Moreover, when the upper water flow meets the lower water flow, the upper water flow is forced to turn by the upward impact force of the lower water flow. As the upward and continuous branch flows downwards, the branch is forced to flow backwards only under the clamping of the upward and downward water flows, so that the water flow smoothly turns from the spiral flow to the axial flow and flows towards the mounting opening 13 of the second end p 2. Also, when the lower water flow encounters the upper water flow, the lower water flow is forced to turn by the downward impact force of the upper water flow. As the downward and continuous branch flows upwards, the branch is forced to flow backwards only under the clamping of the upward and downward water flows, so that the water flow smoothly turns from the spiral flow to the axial flow and flows towards the mounting opening 13 of the second end p 2.

Of course, in the process of flowing along the upper drainage channel 101 and the lower drainage channel 102 from left to right respectively, the water flow is driven by the water pressure, the guiding action of the drainage boss 16 and the extrusion action of the backflow water flow are reversed, so that the water flow direction can smoothly flow from the radial direction to the mounting opening 13 of the second end p2 along the axial direction (the flow direction is shown as a5 in fig. 1 and 2).

The flow guide boss 16 is utilized to guide the water flow flowing in from the pump inlet 14 to the upper flow guide channel 101 and the lower flow guide channel 102 after being split, compared with a scheme without the flow guide boss 16, the scheme with the flow guide boss 16 reduces the flow area of the water flow, so that the water flow entering from the pump inlet 14 is not rapidly slowed down to cause rapid rising of the water pressure, and the water flow impact acting force is slowed down.

In summary, the drainage pump casing 100 is provided with the drainage boss 16, so that water flow is guided in the water inlet guide cavity 10 in a diversion manner, the flow area of the water flow is limited, rapid drop of the flow speed and rapid rise of the water pressure of the water flow are avoided, and the flow condition of the water flow in the guided water flow is stable. The diversion of the single water flow is easier, and the impact force generated by the two water flows on the drainage pump shell 100 during the diversion can be partially offset. In particular, the drainage boss 16 is surrounded by the upper drainage channel 101 and the lower drainage channel 102, the water flow state in the upper drainage channel 101 and the lower drainage channel 102 is stable, the impact generated by the water flow steering in the drainage boss 16 is buffered by the water flow in the upper drainage channel 101 and the lower drainage channel 102, and the impact force released outwards is reduced. Therefore, it is advantageous to reduce the overall vibration of the drainage pump casing 100 and to reduce noise.

The rotational flow generated during reversing is smaller and the flow is smoother under the guidance of the guide cavity peripheral surface S1 and the guide boss 16, so that the radial rotational flow generated during the direction conversion of the water flow is eliminated as much as possible, and the impact loss in the flow channel is reduced.

And the flow guide boss 16 smoothly guides the flow of water to the main pump housing 200, and the flow of water is diverted with a certain flow distance before entering the main pump housing 200, during which the flow of water can be stabilized. The water flow is concentrated toward the water inlet end 301 of the impeller 300, so that the washing pump B obtains a smoother inflow condition. For example, the water flows to the impeller 300 along the axial direction, so that the probability of axial deflection of the impeller 300 after being impacted by rotational flow is reduced, the abrasion to the rotation of the impeller 300 is reduced, and the service life of the impeller 300 is prolonged.

The overall size of the pump housing 100 is thus not excessive, and high flow efficiency of the wash pump B is achieved, reducing vibration and noise during operation.

In the present embodiment, the drainage boss 16 may be a solid block, for example, in the example of fig. 3, the boss section S5 of the drainage boss 16 is a circular surface (or other shape surface, such as an elliptical surface, a diamond surface, etc.) of the hatched portion in fig. 3. In fig. 3, the outer contour n1 of the boss section S5 is circular, and the outer contour area of the boss section S5 refers to the circular area formed by the outer contour n 1.

In the solution of the application, the drainage boss 16 may also be a hollow structure, for example, the drainage boss 16 is formed by recessing a portion of the wall of the drainage pump casing 100 at the first end p1 toward the second end p 2. In the example of fig. 4, the boss section S5 of the drainage boss 16 is an elliptical annular face (or other shape, etc.) of the hatched portion in fig. 4. In fig. 4, the outer contour n1 of the boss section S5 is elliptical, and the outer contour area of the boss section S5 refers to the elliptical area formed by the outer contour n1, rather than the annular area.

In either direction, the flow directing boss 16 tapers in a direction from the first end p1 to the second end p2, which facilitates the flow of water gradually toward the center as it flows along the flow directing boss 16 toward the second end p2, and further facilitates the flow of water axially toward the impeller 300.

In the solution of the present application, the end surface of the water inlet guide cavity 10 at the first end p1 may be a guide cavity end surface S2, and the guide boss 16 is disposed on the guide cavity end surface S2.

In some embodiments, the cavity guiding end surface S2 may be planar, so that machining is convenient, and positioning and installation are convenient for connecting other components. In some embodiments, the cavity end surface S2 is an arc surface, such as a hemispherical surface.

Specifically, the circular arc transition connection between the drainage boss 16 and the drainage cavity end surface S2 is beneficial to guiding the water flow to smoothly and steadily flow to the drainage boss 16 along the circular arc transition surface, and then flow to the second end p2 through the guidance of the drainage boss 16.

Specifically, the circumferential surface S1 of the cavity is in arc transition connection with the end surface S2 of the cavity, so that the flow of water can be smoothly and stably guided along the arc transition surface to flow to the circumferential surface S1 of the cavity, and then guided by the circumferential surface S1 of the cavity to flow to the second end p 2.

In some embodiments, as shown in fig. 1, the drainage boss 16 is a solid of revolution, so that when the water flows along the drainage boss 16 in a rotating manner, the flow is smoother, the water flow resistance is smaller, and thus, the water flow flows along the drainage boss 16 to the second end p2 more smoothly.

In some embodiments, as shown in FIG. 1, the cavity guiding circumferential surface S1 is a cylindrical surface. Thus, when the water flows along the guiding cavity peripheral surface S1 in a rotating way, the flowing is smoother, the water flow resistance is smaller, and the water flows along the guiding cavity peripheral surface S1 to the second end p2 in a smoother way.

In some embodiments, as shown in fig. 1, the drainage boss 16 is a solid of revolution, the cavity guiding circumferential surface S1 is a cylindrical surface, and the drainage boss 16 is coaxially disposed with the cavity guiding circumferential surface S1. The upper and lower guide channels 101 and 102 formed therebetween are circular arc-shaped. Therefore, when water flows along the upper drainage channel 101 and the lower drainage channel 102, the flow and the flow speed are more stable, the water flow is uniformly stressed in the circumferential direction, and the water flow is smoothly reversed and flows towards the second end p 2.

It will be appreciated that the drainage boss 16 and the drainage cavity circumferential surface S1 may be coaxially disposed, and the axis L1 of the water inlet drainage cavity 10 coincides with the axis of the drainage boss 16. The drainage boss 16 and the drainage cavity peripheral surface S1 may be different, and the axes of the drainage boss and the drainage cavity peripheral surface S1 may be parallel or even have a certain included angle, which is not limited herein.

In some embodiments, the end of the drainage boss 16 is a spherical cap surface that is convexly disposed toward the mounting port 13. This facilitates the full angle water flow around the drainage boss 16 to gather rapidly along the spherical crown face towards the axis of the drainage boss 16 as it flows over the spherical crown face, which facilitates the restriction of water flow to flow in the axial direction.

Specifically, as shown in fig. 2, the cross section of the drainage boss 16 passing through the axis of the drainage boss 16 is two symmetrical drainage curves m0. In fig. 2, the axis of the drainage boss 16 coincides with the axis L1 of the water inlet and drainage chamber 10, and the section of the drainage boss 16 passing through the axis L1 is two symmetrical drainage curves m0.

Each drainage curve m0 comprises: the inner convex arc line m1 and the outer convex arc line m2 which are connected, the outer convex arc line m2 of the two drainage curves m0 is connected at one end close to the mounting opening 13, and the inner convex arc line m1 of the two drainage curves m0 is an arc line protruding towards the axis direction. The two drainage curves m0 are similar to parabolas, wherein the two outer convex arc segments m2 can form the spherical cap surface by rotating around the axis of the drainage boss 16 for one circle.

When the water flows over the surface of the portion of the drainage boss 16 corresponding to the inner convex arc segment m1, the water flow can be rapidly turned from the radial direction to the axial direction. When water flows through the surface of the drainage boss 16 corresponding to the outer convex arc section m2, the water flow is favorably gathered rapidly. So configured, the closer the drainage boss 16 is to the second end p2, the less space is occupied. While the water flow gradually flows axially as it flows towards the second end p2, this design is advantageous in that the resistance of the water flow decreases as it flows axially.

In some alternative embodiments, as shown in fig. 2, the axis L1 of the water intake guide chamber 10 is in a height direction, and the height h3 of the drainage boss 16 is at least half the height h2 of the water intake guide chamber 10.

The height h3 of the drainage boss 16 is at least half of the height h2 of the water inlet drainage cavity 10, i.e. h3 is greater than or equal to half of h 2. The guide boss 16 thus serves as much as possible to guide the water flow to the main pump housing 200.

Of course, in some schemes, the height h3 of the drainage boss 16 can be set shorter, and a certain flow guiding and rotation reducing effect can be achieved.

In some embodiments, as shown in FIG. 1, a tongue-separating protrusion 17 is provided on the cavity circumferential surface S1, and the tongue-separating protrusion 17 is spaced apart from the pump intake port 14. Therefore, the rotational flow formed when the water flows along the guide cavity peripheral surface S1 can be further weakened, and the direction of the water flow reversing and flowing along the axial direction can be promoted.

Specifically, the tongue-shaped protrusion 17 is extended in a direction parallel to the axis L1 of the water inlet guide chamber 10, which further promotes the flow direction change direction of the water flow in the axial direction. Optionally, the tongue-separating lug 17 is opposite to the pump inlet 14, the tongue-separating lug 17 and the pump inlet 14 are located at two radial ends of the drainage boss 16 and are just located at the position where the two water flows are converged, so that the relative impact force of the two water flows can be reduced, and the two water flows can be kept in a split state and then are reversed under relative extrusion. The tongue-separating projections 17 located here therefore not only do not generate water flow resistance, but also have a stronger axial guiding action on the water flow.

Of course, the present application is not limited thereto, and there are some embodiments in which the plurality of tongue-separating protrusions 17 may be provided, and the plurality of tongue-separating protrusions 17 are circumferentially spaced apart.

In one embodiment, as shown in FIG. 1, the drainage pump housing 100 is cylindrical, forming a cylindrical cavity, the intake drainage cavity 10. A pump intake 14 is provided on the peripheral wall of the drainage pump casing 100, and a drainage boss 16 is provided inside. The drainage boss 16 is in the shape of a revolution, tapering towards the mounting opening 13. Such a drainage pump housing 100 allows for better inflow conditions for the wash pump B, allowing water to flow generally axially into the impeller 300.

A pump housing assembly 1000 of a washing pump according to an embodiment of the present invention is described below with reference to fig. 1 to 6.

A pump housing assembly 1000 of a washing pump according to an embodiment of the present invention includes: a main pump housing 200 and a drainage pump housing 100.

The main pump housing 200 defines an impeller chamber 210 therein, and the main pump housing 200 is provided at one end with an inner inlet 220, the impeller chamber 210 being for mounting the impeller 300 with the water inlet end 301 of the impeller 300 disposed toward the inner inlet 220. The drainage pump casing 100 is the drainage pump casing 100 of the washing pump of any one of the above embodiments, and the mounting port 13 of the drainage pump casing 100 is connected to the inner inlet 220.

It will be appreciated that the acceleration effect of the impeller 300 on the water flow is affected by the stability of the water flow flowing into the impeller 300, when the speed of the water flow flowing into the impeller 300 is unstable, the pressure of the water flow received by the impeller 300 at different positions is different, and the pressure difference received by the impeller 300 may generate resistance to the rotation of the impeller 300, so as to affect the acceleration effect of the impeller 300 on the water flow, and meanwhile, the pressure difference may also cause the impeller 300 to vibrate during rotation, so as to increase the noise of the rotation of the impeller 300.

In the pump housing assembly 1000 of the washing pump of the application, water flow enters the drainage pump housing 100 through the pump inlet 14, and the water flow in the drainage pump housing 100 flows to the water inlet end 301 of the impeller 300 through the inner inlet 220, so that the water flow flows into the impeller 300 to accelerate and pump. By adopting the drainage pump casing 100 of any one of the embodiments, the drainage pump casing 100 has the functions of steering water flow and enabling the water flow to be more stable, so that the water flow flowing into the impeller 300 from the mounting opening 13 of the drainage pump casing 100 is more stable, the pressure difference suffered by the impeller 300 during rotation can be reduced, the driving effect of the impeller 300 on the water flow is improved, the flow efficiency of the water flow in the pump casing assembly 1000 is ensured, meanwhile, the vibration generated by rotation of the impeller 300 can be reduced, and the vibration and noise generated by the operation of the pump casing assembly 1000 are reduced.

In some embodiments, as shown in fig. 5 and 6, one end surface of the main pump housing 200 is an auxiliary guide end surface S3, and the inner inlet 220 is provided on the auxiliary guide end surface S3, and the auxiliary guide end surface S3 is located in the mounting port 13. The auxiliary guiding end surface S3 is annular and curved, and the auxiliary guiding end surface S3 extends toward the first end p1 of the guiding cavity peripheral surface S1 in the radial inward direction.

By the cooperation of the auxiliary leading end surface S3 and the drainage pump shell 100, the water inlet leading cavity 10 is formed into a closed cavity, so that water flow is ensured not to leak out of the drainage pump shell 100 when flowing in the water inlet leading cavity 10, and only flows to the main pump shell 200. The auxiliary guiding end surface S3 is similar to a horn shape in shape, on one hand, the water flow is promoted to gather towards the center along the auxiliary guiding end surface S3 so as to guide the water flow to the inner inlet 220, turbulence caused by the radial outward flow of the water flow is reduced, and the water flow is restrained to flow to the impeller 300 along the axial direction as much as possible. On the other hand, when the water flow entering the water inlet guide cavity 10 meets the auxiliary guide end surface S3, the water flow flows along the upper guide channel 101 and the lower guide channel 102 as much as possible under the guidance of the auxiliary guide end surface S3, so that the water flow is guided to the main pump shell 200 along the guide boss 16 as much as possible. Therefore, the auxiliary guiding end surface S3 also has the function of converging the water flow, which is beneficial to weakening the radial rotational flow of the water flow and enabling the water flow to the impeller 300 along the axial direction.

The shape of the secondary end face S3 in the present application in a cross section through the axis L of the pump housing assembly 1000 is two lines, each line being referred to herein as an end face plain line. The shape of each end surface element line can be selected in various ways. In some alternatives, the end face element line is a straight line segment or curve, with one end of the end face element line being forward and the other end being rearward, the rearward end being closer to the axis L of the pump housing assembly 1000. In other alternatives, the end face element line is composed of a plurality of line segments, and the like.

Specifically, the auxiliary leading end surface S3 is similar to a conical cylindrical surface as a whole. The auxiliary leading end surface S3 may or may not be changed in the same diameter in the direction toward the leading end surface S2.

In the present embodiment, the inner inlet 220 is opposite to the water inlet 301 of the impeller 300 according to the characteristics of the washing pump B, so that the water flows axially toward the impeller 300. The washing pump B has the axis of the impeller 300 as the axis L of the whole washing pump B and is also the axis L of the pump housing assembly 1000.

The shape of the inner inlet 220 in a cross section perpendicular to the axis of the inner inlet 220 is circular or nearly circular. The cross-sectional shape of the inner inlet 220 may be the same or different throughout its axis, where the cross-sectional shape of the inner inlet 220 is the shape of the cross-section perpendicular to the axis. For example, the shape of the inner inlet 220 adjacent to the end of the pilot pump casing 100 may be elliptical, and the shape of the inner inlet 220 adjacent to the end of the impeller 300 may be circular. Preferably, the cross-sectional shape of the inner inlet 220 is circular throughout the axis. Alternatively, the inner inlet 220 axis coincides with the axis L of the pump housing assembly 1000, i.e., with the axis of the impeller 300.

Alternatively, the cross-sectional dimensions of the inner inlet 220 may be the same or different throughout the axis. Further alternatively, the inner inlet 220 may vary in size in cross section throughout the law.

The trend of the variation in the cross-sectional size in the axial direction of the inner inlet 220 is not limited. For example, in a direction from the first end p1 to the second end p2, the inner inlet 220 is a straight port having a constant cross-sectional area, and the inner inlet 220 is a straight pipe type. For another example, in the example of fig. 6, the inner inlet 220 is a constriction with a gradually decreasing cross-sectional area in the direction from the first end p1 to the second end p2, and the inner inlet 220 is a constriction. At this time, since the flow rate of the water flowing into the inner inlet 220 is stable, the cross section of the inner inlet 220 gradually decreases along the flow direction of the water flow to accelerate the flow rate of the water flow, so that the water flow is accelerated to flow into the impeller 300, and the acceleration of the impeller 300 to the water flow is improved. For another example, the inner inlet 220 is a constriction with a gradually decreasing cross-sectional area, and the inner inlet 220 is a diverging. Such a structure of the inner inlet 220 may serve to slow down the flow rate of water when the flow rate of water flowing into the inner inlet 220 is excessively large.

In some embodiments, as shown in FIG. 5, the pump housing assembly 1000 further includes a fairing 250 disposed within the inner inlet 220.

It can be appreciated that the rectifying rib 250 has a blocking effect on the water flow of the rotational flow in the inner inlet 220, and does not block the water flow flowing in the inner inlet 220, so that the rotational flow generated in the inner inlet 220 is reduced, the water flow is ensured to flow into the impeller 300 from the water inlet end 301 of the impeller 300 along the axial direction of the inner inlet 220, the hydraulic loss of the water flow caused by the rotational flow is reduced, the driving effect of the impeller 300 on the water flow is improved, and the flowing efficiency of the water flow in the pump housing assembly 1000 is improved.

In the present application, the arrangement of the rectifying rib 250 is not limited, and the structure of the rectifying rib 250 needs to have a blocking effect on the water flow flowing in the inner direction of the inner inlet 220, and does not block the water flow flowing in the inner direction of the inner inlet 220. For example, in the example of fig. 5, the ribs 250 are provided as cross partitions extending in the axial direction of the inner inlet 220. For another example, the flow straightener 250 may also be provided as a "well" cross-baffle extending axially of the inner inlet 220 within the inner inlet 220. Even further, the flow straightening ribs 250 may be provided as mesh-like partitions extending in the axial direction of the inner inlet 220 within the inner inlet 220.

Alternatively, the rectifying rib 250 may be cross-shaped or in-line, and the rectifying rib 250 may be other shapes, which are not limited herein.

In some embodiments, as shown in fig. 6, the inner inlet 220 forms an inner cone 11 at an end edge line n2 toward the water inlet guide chamber 10 to an end of the guide boss 16, the inner cone 11 has a cross-sectional area E1 passing through an axis of the guide boss 16, the pump inlet 14 has a cross-sectional area E2 in a direction perpendicular to an axis L2 of the pump inlet 14, and half of the cross-sectional area E2 is E3, and it is satisfied that: e1 is within 90% -110% of E3.

Even further, E1 is equal to E3, i.e. the cross-sectional area E1 of the inner cone 11 passing through the axis of the drainage boss 16 is half the cross-sectional area E2 of the pump intake 14 in a direction perpendicular to the axis L2 of the pump intake 14. Thus, the flow cross-sectional area of the flow guide boss 16 can be limited to approximately half the flow area of the pump intake 14, whereby a good acceleration and depressurization can be achieved, allowing water to gather and then rapidly enter the main pump casing 200.

In particular, as in the example of fig. 6, the inlet flow rate of the diversion pump casing 100 is substantially the inflow area of the pump inlet 14, that is, the cross-sectional area E2 of the pump inlet 14 in the direction perpendicular to the axis L2 of the pump inlet 14. For example, when the pump intake port 14 is a circular port, the cross-sectional area E2 of the pump intake port 14 in the direction perpendicular to the axis L2 is the circular area.

In some embodiments, the axis of the drainage boss 16 coincides with the axis L1 of the water inlet guide cavity 10, and at this time E1 is the cross-sectional area of the inner cone cavity 11 passing through the axis L1. When the end of the drainage boss 16 is a conical tip, the inner conical cavity 11 is a conical cavity between the conical tip and the edge line n2 of the inner inlet 220. When the end of the drainage boss 16 is a spherical cap surface, as shown in fig. 6, the inner conical cavity 11 is a conical-like cavity between the spherical cap surface and the edge line n2 of the inner inlet 220.

The washing pump B according to an embodiment of the present invention includes the pump housing assembly 1000 of the washing pump of any of the above embodiments and the impeller 300, and the impeller 300 is provided in the impeller chamber 210 of the main pump housing 200.

According to the washing pump B provided by the embodiment of the invention, by arranging the pump shell assembly 1000 of the washing pump of any embodiment, the flow of water flow in the washing pump B is smoother, the driving effect of the pump shell assembly 1000 on the water flow can be improved, and meanwhile, the vibration generated by the operation of the pump shell assembly 1000 is reduced. Thereby improving the cleaning effect of the washing pump B and reducing vibration of the washing pump B during operation.

In some embodiments, as shown in fig. 6, the wash pump B further comprises: the heater 600, the heater 600 is set up in the water intake leading chamber 10. The water flow is thereby heated before entering the impeller 300, and the water flow is thoroughly stirred as it flows through the impeller 300, so that the water temperature is gradually uniform. The heater 600 is arranged in the water inlet guide cavity 10, so that the space of the subsequent pipeline is not occupied, and the space of the water inlet guide cavity 10 is fully utilized. The water flow in the water inlet guide cavity 10 is subjected to steering, and the flow distance of the water flow is prolonged through the guide structure 15, so that the water flow can fully absorb the heat of the heater 600, and the heat exchange rate is improved.

Specifically, the heater 600 is disposed at least partially around the two drainage bosses 16 such that water flows along the upper and lower drainage channels 101, 102 as well as along the heater 600. The heater 600 is arranged in this way, so that the flow direction of the water flow can be reduced, the flow resistance of the water flow is reduced, and on the other hand, the heater 600 is effectively integrated with the upper drainage channel 101 and the lower drainage channel 102, thereby being beneficial to further reducing the volume of the washing pump B.

Further, the washing pump B further includes a driving motor 700, the driving motor 700 is mounted on the pump housing assembly 1000, and a transmission shaft of the driving motor 700 is connected to the impeller 300.

A washing appliance a according to an embodiment of the present invention is described below with reference to fig. 1 to 7.

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

According to the washing electric appliance A provided by the embodiment of the invention, the washing pump B is arranged, so that the washing effect is improved, the energy consumption is reduced, and the vibration and the noise are reduced.

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

Other constructions and operations of the drain pump housing 100 of the washing pump, the pump housing assembly 1000 of the washing pump, and the dish washer and washing machine having the same according to embodiments of the present invention are known to those of ordinary skill in the art, and will not be described in detail herein.

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 (15)

1. The drainage pump shell of the washing pump is characterized in that a water inlet drainage cavity is formed in the drainage pump shell, the outer peripheral surface of the water inlet drainage cavity is a drainage cavity peripheral surface, a pump suction inlet is formed in the drainage cavity peripheral surface, and two axial ends of the drainage cavity peripheral surface are respectively a first end and a second end;

The drainage pump shell is provided with a drainage boss at the first end, the section of the drainage boss in the direction perpendicular to the axis of the water inlet drainage cavity is a boss section, and the outer contour area of the boss section is gradually reduced in the direction towards the second end;

The drainage pump shell is provided with a mounting port communicated with the water inlet drainage cavity at the second end, and the mounting port is used for being connected with a main pump shell of the washing pump.

2. The drainage pump casing of a washing pump according to claim 1, wherein the drainage boss is a revolution body, the drainage cavity circumferential surface is a cylindrical surface, and the drainage boss is coaxially arranged with the drainage cavity circumferential surface.

3. The drainage pump casing of claim 1, wherein an end of the drainage boss is a spherical crown surface protruding toward the mounting port.

4. A drainage pump casing of a washing pump according to claim 3, characterized in that said drainage boss has two symmetrical drainage curves in a section through the axis of said drainage boss, each of said drainage curves comprising: the inner convex arc line segments and the outer convex arc line segments are connected, the outer convex arc line segments of the two drainage curves are connected at one end close to the mounting opening, and the inner convex arc line segments of the two drainage curves are arc line segments protruding towards the axis direction.

5. The drainage pump casing of a washing pump according to any one of claims 1 to 4, wherein a tongue-separating projection is provided on the peripheral surface of the guide chamber, the tongue-separating projection being spaced apart from the pump intake port.

6. The pump casing of claim 5, wherein the tongue-separating protrusion is extended in a direction parallel to an axis of the water intake guide chamber, and the tongue-separating protrusion is disposed opposite to the pump intake port.

7. The drainage pump casing of any one of claims 1 to 4, wherein the direction in which the axis of the water inlet guide chamber is located is a height direction, and the height of the drainage boss is at least half of the height of the water inlet guide chamber.

8. A pump housing assembly for a washing pump, comprising:

the impeller comprises a main pump shell, wherein an impeller cavity is defined in the main pump shell, one end of the main pump shell is provided with an inner inlet, and the impeller cavity is used for installing an impeller and enabling the water inlet end of the impeller to face the inner inlet;

A drainage pump casing, which is a drainage pump casing of a washing pump according to any one of claims 1-7, wherein a mounting opening of the drainage pump casing is connected with the inner inlet.

9. A pump housing assembly of a washing pump according to claim 8 wherein said inner inlet forms an inner cone from an edge line towards one end of said intake guide chamber to an end of said flow directing boss, said inner cone having a cross-sectional area E1 passing through an axis of said flow directing boss, said pump intake having a cross-sectional area E2 in a direction perpendicular to an axis of said pump intake, half of said cross-sectional area E2 being E3, and: e1 is within 90% -110% of E3.

10. The pump housing assembly of claim 8, wherein an end face of said main pump housing is an auxiliary end face, said inner inlet being provided on said auxiliary end face, said auxiliary end face being located within said mounting port;

The auxiliary guiding end face is annular and is a curved surface, and extends towards the first end of the guiding cavity peripheral face along the radial inward direction.

11. The pump housing assembly of claim 8, wherein the inner inlet is a straight port of constant cross-sectional area, or the inner inlet is a flared port of progressively increasing cross-sectional area, or the inner inlet is a necked down port of progressively decreasing cross-sectional area, in a direction from the first end to the second end.

12. The pump housing assembly of any of claims 8-11, further comprising a flow straightening rib disposed within the inner inlet.

13. A wash pump, comprising:

A pump housing assembly of a washing pump according to any one of claims 8-12;

and the impeller is arranged in an impeller cavity of the main pump shell of the pump shell assembly.

14. The wash pump of claim 13, further comprising: the heater is arranged in the water inlet guide cavity, and at least part of the heater is arranged around the guide boss.

15. A washing appliance comprising a washing pump according to claim 13 or 14.