CN218377037U - Drainage pump shell, pump shell assembly, washing pump with drainage pump shell assembly and washing electric appliance with drainage pump shell assembly - Google Patents

Abstract

The utility model discloses a drainage pump shell, pump shell subassembly and have its washing pump, washing electrical apparatus. A water inlet guide cavity is formed in the drainage pump shell, the peripheral surface of the water inlet guide cavity is the peripheral surface of the guide cavity, a pump suction inlet is formed on the peripheral surface of the guide cavity, and the axial two ends of the peripheral surface of the guide cavity are respectively a first end and a second end. The drainage pump shell is provided with a drainage boss at the first end, the cross section of the drainage boss in the direction perpendicular to the axis of the water inlet drainage cavity is a boss cross section, and the outer contour area of the boss cross 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 utility model discloses drainage pump case, the whole size need not be too big, can make the washing pump obtain higher flow efficiency, has reduced vibration and noise when moving.

Description

Drainage pump shell, pump shell assembly, washing pump with drainage pump shell assembly and washing electric appliance with drainage pump shell assembly

Technical Field

The utility model relates to a washing electrical apparatus technical field, concretely relates to drainage pump case, pump case subassembly and have its washing pump, washing electrical apparatus.

Background

The washing pump is a core component of the washing appliance. Taking a dish washing machine and a washing machine as examples, a washing pump is responsible for the power source of the whole circulating water path, and the performance index and the energy efficiency level of the washing pump directly influence the washing efficiency, the energy consumption, the vibration noise and other visual feelings of the dish washing machine and the washing machine.

On some washing pumps in real life, a pump suction inlet is positioned at one axial end of an impeller, and water flow directly flows into the impeller along the axial direction. The washing pump has a very large integral axial dimension, and can cause the washing electric appliance to be too wide if the washing pump is transversely arranged at the bottom of the washing electric appliance, and can also cause the washing electric appliance to be too wide if the washing pump is vertically arranged in an inner cavity avoiding the washing electric appliance. In some washing pumps, a pump suction inlet is arranged on the side surface of the washing pump, and water flows into the washing pump along the radial direction, turns 90 degrees and then flows to the impeller. This leads to rivers to take the whirl to get into the impeller easily, and the flow is chaotic, has the impact loss, and vibration noise is big, the inefficiency problem.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a drainage pump case of washing pump utilizes the drainage pump case with rivers direction impeller to reduce the loss of impact of rivers in the washing pump, make the rivers that get into the impeller more stable, improve the stability of washing pump work.

The utility model discloses also aim at providing a pump case subassembly of the washer pump of above-mentioned drainage pump case.

The utility model discloses aim at providing a washing pump who has above-mentioned pump case subassembly again.

The utility model discloses still aim at providing a washing electrical apparatus who has above-mentioned washing pump.

According to the utility model discloses drainage pump case of washing pump, it draws the chamber to form into water in the drainage pump case, it draws the outer peripheral face in chamber for drawing the chamber global to intake water, it is formed with the pump sunction inlet on the chamber global to draw, draw the axial both ends that the chamber is global to be first end and second end respectively. The drainage pump shell is provided with a drainage boss at the first end, the cross section of the drainage boss in the direction perpendicular to the axis of the water inlet drainage cavity is a boss cross section, and the outer contour area of the boss cross section is gradually reduced 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 connecting a main pump shell of the washing pump.

According to the utility model discloses the drainage pump case of washing pump sets up the drainage boss in the drainage pump case, makes rivers can be shunted and along drainage boss, draw the global flow in chamber after getting into the drainage pump case, makes the washing pump obtain steady inflow condition, and axial direction impeller is followed as far as possible to rivers. The setting of drainage boss has restricted rivers flow area, avoids rivers velocity of flow sharply to fall, water pressure sharply rises, makes rivers flow situation more stable in being guided. Two water flows meet after the water flow is divided, the impact force of the two water flows can be offset mutually, and the two water flows are extruded mutually to be beneficial to eliminating rotational flow generated when the water flow is converted, so that the overall vibration of a drainage pump shell is reduced, and the noise is reduced. Under the guidance of the peripheral surface of the drainage cavity and the drainage boss, water flow turns to the impeller in a certain flow distance, the flow state tends to be stable in the flow, the impact loss is reduced, and the swirling flow before the water flow enters the impeller is reduced, so that the impeller is more stable in rotation. The whole size of the drainage pump shell does not need to be overlarge, so that the washing pump can obtain higher flow efficiency, and the vibration and noise during operation are reduced.

In some embodiments, the drainage boss is a rotational body, the circumferential surface of the drainage cavity is a cylindrical surface, and the drainage boss and the circumferential surface of the drainage cavity are coaxially arranged.

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

Further, the drainage boss is two symmetrical drainage curves in the cross-section of the axis passing through the drainage boss, and each drainage curve comprises: the inner convex arc line segment and the outer convex arc line segment 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 projection is provided on the peripheral surface of the suction cavity, the tongue projection being spaced apart from the pump suction port.

Specifically, the tongue isolating bump extends along a direction parallel to the axis of the water inlet guide cavity, and the tongue isolating bump is arranged opposite to the pump suction inlet.

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

According to the utility model discloses pump case subassembly of washing pump, include: the impeller pump comprises a main pump shell, wherein an impeller cavity is defined in the main pump shell, an inner inlet is formed in one end of the main pump shell, and the impeller cavity is used for mounting an impeller and enabling the water inlet end of the impeller to face the inner inlet; the drainage pump shell is the drainage pump shell of the washing pump in any one of the embodiments, and the mounting opening of the drainage pump shell is connected with the inner inlet.

According to the utility model discloses pump case subassembly of washing pump, rivers warp behind the drainage pump case drainage warp interior import gets into main pump case in the impeller of impeller intracavity to the rivers that make radial inflow turn into axial flow's rivers, reduce the whirl. Therefore, hydraulic loss can be reduced, the efficiency of the impeller and the washing pump is improved, and vibration noise is reduced.

Specifically, the inner inlet is located at an edge line of one end facing the water inlet drainage cavity, an inner conical cavity is formed from the inner inlet to the end of the drainage boss, 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 suction inlet in the direction perpendicular to the axis of the pump suction inlet is E2, and half of the cross-sectional area E2 is E3, and the requirements are that: e1 is within 90% to 110% of E3.

In some embodiments, an end face of the main pump casing is an auxiliary guide end face, the inner inlet is provided on the auxiliary guide end face, and the auxiliary guide end face is located in the mounting port. The auxiliary leading end face is annular and is a curved surface, and the auxiliary leading end face extends towards the first end of the circumferential face of the leading cavity along the radial inward direction.

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

In some embodiments, the pump casing assembly further comprises a fairing rib disposed within the inner inlet. The arrangement of the flow-straightening ribs can further eliminate radial rotational flow entering the inner inlet.

According to the utility model discloses the washing pump, including any one of above-mentioned embodiment the pump case subassembly, the impeller of washing pump, the impeller is established the impeller intracavity of the main pump case of pump case subassembly.

According to the utility model discloses washing pump, through setting up the pump case subassembly of the washing pump of any above-mentioned embodiment, rivers flow in washing pump more steadily, can improve the drive effect of pump case subassembly to rivers, reduce the vibration that pump case subassembly work produced simultaneously. Thereby improving the cleaning effect of the washing pump through water flow and reducing the vibration of the washing pump during working.

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

According to the utility model discloses washing electric appliance, including the washing pump of any one above-mentioned embodiment.

According to the utility model discloses washing electrical apparatus, through setting up the washing pump of any above-mentioned embodiment, rivers are more steady in the flow of washing pump, can improve the drive effect of pump case subassembly to rivers, reduce the vibration that pump case subassembly work produced simultaneously. Thereby improving the cleaning effect of the washing electric appliance through water flow and reducing the vibration during 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 above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of a drain pump housing according to an embodiment of the present invention;

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

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

FIG. 4 is a schematic cross-sectional view of a drainage pump casing according to 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 wash pump according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram 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:

a washing electric appliance A, a washing pump B,

A pump housing assembly 1000, an axis L of the pump housing assembly,

A drainage pump shell 100,

A water inlet drainage cavity 10, an upper drainage channel 101, a lower drainage channel 102, a drainage cavity peripheral surface S1, a drainage cavity end surface S2, a mounting opening 13, a pump suction inlet 14, a first end p1, a second end p2, an inner cone cavity 11, a water inlet drainage cavity axis L1, a pump suction inlet axis L2, a water inlet drainage cavity axis,

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

A tongue isolating lug 17,

A main pump housing 200, an impeller cavity 210, an inner inlet 220, an edge line n2,

An auxiliary leading end surface S3, a rectifying rib 250,

An impeller 300, a water inlet end 301,

Heater 600, driving motor 700.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "vertical," "lateral," "length," "left," "right," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A drain pump case 100 of a washing pump according to an embodiment of the present invention will be described with reference to the accompanying drawings.

The drain pump case 100 is a part of a pump case assembly 1000 of the washing appliance a, and the drain pump case 100 is connected to an input terminal of the main pump case 200. The drainage pump shell 100 is internally provided with a water inlet drainage cavity 10, and the water inlet drainage cavity 10 is provided with a mounting opening 13 and a pump suction opening 14.

As shown in fig. 6, the drain pump casing 100 is used to divert the inflow of fluid and introduce the diverted fluid into the main pump casing 200. It is understood that the liquid pumped by the washing pump is usually water or an aqueous solution, and may be other anhydrous liquids, and for simplicity, the washing pump is used for pumping water. When the washing pump is installed in the equipment for water flow driving, the installation space provided for the washing pump is limited due to the limited volume of the equipment, so that the water flow faces the diversion problem in such a small space. If the water flow turns to smoothly inadequately, a too violent rotational flow is generated, the water flow resistance is increased, the energy consumption of the washing pump is too large, the rotational flow has too large impact damage to the impeller, and the service life of the impeller is shortened.

In order to solve the above problems, the present application provides a draft pump case 100 that makes the flow turn smoother when the flow is introduced into a main pump case 200 in which an impeller 300 is installed.

Referring to fig. 1 and 3, the outer circumferential surface of the inlet water guide chamber 10 is a guide chamber circumferential surface S1, and a pump inlet 14 is formed on the guide chamber circumferential surface S1. The axial two ends of the circumferential surface S1 of the guide cavity are respectively a first end p1 and a second end p2. The drainage pump shell 100 is provided with a mounting port 13 communicated with the water inlet drainage cavity 10 at the second end p2, and the mounting port 13 is used for connecting a main pump shell 200 of the washing pump B. Thus, the water flow can enter the water intake chamber 10 through the pump inlet 14, and the diverted water flow attachment port 13 flows from the water intake chamber 10 into the main pump housing 200.

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

To understand the function of the drainage bosses 16, this is further explained 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 inlet 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 port 13 and connected to the main pump casing 200. At this time, the drain pump case 100 serves to guide the water flow flowing in from the left side backward, making the water flow turn 90 degrees.

If the drainage boss 16 is not arranged in the drainage pump shell 100, the water flows into the drainage pump shell from the left and then rushes to the right section part of the peripheral surface S1 of the drainage cavity. In the process of flowing to the right, although part of water flows backwards under the driving of water pressure, a large amount of water flow generates right impact force on the peripheral surface S1 of the guide cavity. The water flow impact force is large, and the impact force fluctuates to a certain extent, so that the whole drainage pump shell 100 generates large vibration and noise. And the water flow can generate certain rotational flow when turning, the rotational flow is not beneficial to the stable operation of the impeller 300, and vibration and noise can be avoided during operation.

And in this application scheme, after setting up drainage boss 16, can turn to the rivers and produce multiple guide effect:

firstly, since the outer contour area of the boss section S5 is gradually reduced in the direction toward the second end p2, i.e., the flow-directing boss 16 is gradually tapered from front to rear, the outer surface of the flow-directing boss 16 corresponds to a kind of guide surface. After part of the water flow (flowing to a1 in fig. 1 and 2) flowing into the pump inlet 14 directly impacts 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 to the mounting port 13 along the drainage boss 16 (flowing to 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 (shown as a1 in fig. 1 and 2) entering the pump inlet 14 is mostly split into two flows by the diversion boss 16. An upper drainage channel 101 is formed between the drainage boss 16 and the upper section of the peripheral surface S1 of the drainage cavity, and a lower drainage channel 102 is formed between the drainage boss 16 and the lower section of the peripheral surface S1 of the drainage cavity. After being divided upwards, part of the water flows to the right through the upper drainage channel 101 (the flow direction is shown as a3 in fig. 2 and 3). After a part of the water flow is divided downwards, it flows to the right through the lower drainage channel 102 (the flow direction is shown as a4 in fig. 2 and 3). After the two flows are divided, the impact force to the right of the drainage pump casing 100 is reduced. When the two water flows meet, the impact acting forces of the two water flows are opposite in direction, so that a part of the impact acting forces can be mutually offset, and the impact force on the drainage pump shell 100 in the vertical direction is smaller. Therefore, compared with the scheme without the drainage boss 16, the scheme of the application can greatly reduce the vibration and the noise of the drainage pump shell 100.

And 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. Due to the downward flow of the upper continuous branch, the upward and downward water flows are forced to flow backward only under the impact of the upward and downward water flows, so that the water flow is smoothly diverted from the rotational flow to the axial flow and then flows toward the mounting opening 13 of the second end p2. Similarly, when the lower water flow meets the upper water flow, the lower water flow is forced to turn by the downward impact force of the upper water flow. Due to the upward flow of the lower active stream, the stream is forced to flow only backward by the impact of the upper and lower streams, so that the stream is smoothly diverted from the rotational flow to the axial flow and then flows toward the mounting opening 13 of the second end p2.

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

The drainage boss 16 is used for guiding the water flow flowing in from the pump inlet 14 to the upper drainage channel 101 and the lower drainage channel 102 after being divided, and compared with a scheme without the drainage boss 16, the scheme with the drainage boss 16 reduces the flow area of the water flow, so that the water pressure is not increased rapidly due to rapid speed reduction of the water flow entering from the pump inlet 14, and the water flow impact acting force is relieved.

In conclusion, the drainage pump casing 100 is provided with the drainage boss 16, so that water flow is guided in a divided manner in the water inlet drainage cavity 10, the flow area of the water flow is limited, the rapid drop of the flow speed and the rapid rise of the water pressure of the water flow are avoided, and the flow condition of the guided water flow is stable. After diversion, a single water flow is easier to turn, and the impact force generated by the two water flows on the drainage pump shell 100 in the turning process can be partially offset mutually. Particularly, the drainage boss 16 is surrounded by the upper drainage channel 101 and the lower drainage channel 102, the flow state of water flow in the upper drainage channel 101 and the lower drainage channel 102 is stable, and impact generated by the water flow in the drainage boss 16 is reduced by the buffering of the water flow in the upper drainage channel 101 and the lower drainage channel 102. Therefore, the overall vibration of the pump casing 100 is reduced, and noise is reduced.

Under the guidance of the circumferential surface S1 of the drainage cavity and the drainage boss 16, the water flow is smaller in rotational flow generated during reversing, the flow is smoother, the radial rotational flow generated during water flow direction conversion is eliminated as far as possible, and the impact loss in the flow channel is reduced.

And the flow guide boss 16 smoothly turns the water flow and guides the water flow to the main pump housing 200, the water flow has a certain flow distance to turn before entering the main pump housing 200, and the water flow tends to flow stably in the flow process. The water flow is intensively directed 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 flow flows to the impeller 300 along the axial direction, so that the probability of axial deflection of the impeller 300 after being impacted by the rotational flow is reduced, the abrasion of the rotation of the impeller 300 is reduced, and the service life of the impeller 300 is prolonged.

Therefore, the whole size of the draft pump casing 100 does not need to be excessively large, and the washing pump B can obtain high flow efficiency, and reduce 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 rhombic surface, etc.) of the hatched portion in fig. 3. In fig. 3, the outer contour n1 of the boss section S5 is circular, and in this case, the outer contour area of the boss section S5 refers to the circular area formed by the outer contour n 1.

In the present embodiment, the drainage boss 16 may also be a hollow structure, for example, the drainage boss 16 is formed by a portion of the casing wall of the drainage pump casing 100 at the first end p1 being recessed toward the second end p2. In the example of fig. 4, the boss section S5 of the flow-inducing boss 16 is an elliptical annular surface (or other shape, etc.) shaded in fig. 4. In fig. 4, the outer contour n1 of the boss section S5 is an ellipse, and the outer contour area of the boss section S5 refers to the elliptical area formed by the outer contour n1, not the annular surface area.

Whichever direction, drainage boss 16 is the tapering from first end p1 to second end p 2's direction, is favorable to rivers like this along drainage boss 16 towards the in-process that second end p2 flows, makes rivers towards the central mass flow gradually, is favorable to rivers to flow to impeller 300 along the axial more.

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

In some embodiments, the cavity end surface S2 may be a plane, which is convenient for processing, so as to connect other components and facilitate positioning and installation. In the scheme that does not exclude, the end surface S2 of the leading cavity is an arc surface, such as a hemispherical surface.

Specifically, the drainage boss 16 is in arc transition connection with the drainage cavity end surface S2, which is favorable for guiding water flow to smoothly and stably flow to the drainage boss 16 along the arc transition surface, and then flow to the second end p2 by being guided by the drainage boss 16.

Specifically, the circumferential surface S1 of the leading cavity is in arc transition connection with the end surface S2 of the leading cavity, so that water flow can be guided to smoothly and stably flow to the circumferential surface S1 of the leading cavity along the arc transition surface, and then flow to the second end p2 by being guided by the circumferential surface S1 of the leading cavity.

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

In some embodiments, as shown in fig. 1, the cavity circumferential surface S1 is a cylindrical surface. Therefore, when water flows rotationally along the circumferential surface S1 of the guide cavity, the water flows more smoothly and the water flow resistance is smaller, so that the water flows more smoothly along the circumferential surface S1 of the guide cavity to the second end p2.

In some embodiments, as shown in fig. 1, the drainage boss 16 is a solid of revolution, the circumferential surface S1 of the drainage cavity is a cylindrical surface, and the drainage boss 16 is disposed coaxially with the circumferential surface S1 of the drainage cavity. The upper drainage channel 101 and the lower drainage channel 102 formed between the two channels are both 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 stress of the water flow in the circumferential direction is uniform, and the water flow is favorably smoothly reversed and flows towards the second end p2.

It can be understood that the drainage boss 16 and the drainage cavity peripheral surface S1 may be coaxially arranged, 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 circumferential surface S1 can also be non-coaxial, and the axes of the drainage boss and the drainage cavity circumferential surface S1 can be parallel or even have a certain included angle, which is not limited here.

In some embodiments, the end of the drainage boss 16 is a spherical cap surface that is convexly disposed toward the mounting port 13. Thus, when the full-angle water flow surrounding the drainage boss 16 flows through the spherical crown surface, the water flow is rapidly gathered along the spherical crown surface towards the axis of the drainage boss 16, and the water flow is restrained to flow along the axial direction.

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

Each drainage curve m0 comprises: the inner convex arc segment m1 and the outer convex arc segment m2 are connected, the outer convex arc segment m2 of the two drainage curves m0 is connected at one end close to the mounting opening 13, and the inner convex arc segment m1 of the two drainage curves m0 is a convex arc segment towards the axis direction. The two drainage curves m0 are similar to a parabola, wherein the two outer convex arc segments m2 rotate around the axis of the drainage boss 16 for one circle, so that the spherical crown surface can be formed.

When the water flows through the surface of the part, corresponding to the inner convex arc segment m1, of the drainage boss 16, the water flow can be quickly turned from the radial direction to the axial direction. When water flows through the surface of the part of the drainage boss 16 corresponding to the outer convex arc line section m2, the water flow is favorably and quickly gathered. With this arrangement, the drainage boss 16 occupies less space as it approaches the second end p2. While the water flow gradually flows in the axial direction when flowing toward the second end p2, so the design is favorable for the resistance reduction of the water flow when flowing in the axial direction.

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

The height h3 of the drainage boss 16 is at least half of the height h2 of the water inlet drainage cavity 10, namely h3 is more than or equal to half of h 2. In this way, the flow directing bosses 16 direct as much of the water as possible toward the main pump housing 200.

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

In some embodiments, as shown in fig. 1, the suction cavity circumferential surface S1 is provided with a tongue projection 17, and the tongue projection 17 is spaced apart from the pump suction port 14. Therefore, the rotational flow formed when the water flows along the peripheral surface S1 of the guide cavity can be further weakened, and the water flow can be promoted to change direction and flow along the axial direction.

In particular, the baffle projection 17 extends in a direction parallel to the axis L1 of the water inlet chamber 10, which further promotes the reversal of the direction of the water flow and the axial flow. Optionally, the tongue separation protruding block 17 is arranged opposite to the pump suction port 14, and the tongue separation protruding block 17 and the pump suction port 14 are located at two radial ends of the drainage boss 16 and are just located at the upper and lower flow splitting and converging positions, so that the mutual impact force when two flows converge can be reduced, and the two flows can be continuously kept in a flow splitting state and then are reversed under relative extrusion. Therefore, the baffle lug 17 at the position can not generate water flow resistance, and has stronger axial guiding function to the water flow.

Of course, the present application is not limited to this, and there may be a plurality of the tongue isolating protrusions 17, and the plurality of tongue isolating protrusions 17 are distributed at intervals in the circumferential direction.

In one embodiment, as shown in FIG. 1, the draft pump casing 100 is cylindrical and defines a cylindrical cavity therein, i.e., the inlet draft chamber 10. The peripheral wall of the drainage pump casing 100 is provided with a pump inlet 14, and a drainage boss 16 is provided therein. The flow guide projection 16 is in the form of a rotor and tapers towards the mounting opening 13. The drainage pump shell 100 can ensure that the washing pump B obtains better inflow conditions, and water can flow into the impeller 300 along the axial direction.

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

According to the utility model discloses pump case subassembly 1000 of washing pump, include: a main pump casing 200 and a drain pump casing 100.

An impeller chamber 210 is defined in the main pump case 200, and an inner inlet 220 is formed at one end of the main pump case 200, and the impeller chamber 210 is used to mount the impeller 300 such that the water inlet end 301 of the impeller 300 is disposed toward the inner inlet 220. The drain pump casing 100 is the drain pump casing 100 of the washing pump of any one of the above embodiments, and the mounting port 13 of the drain pump casing 100 is connected with the inner inlet 220.

It can be understood that the acceleration effect of the impeller 300 on the water flow is influenced 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 water flow pressure suffered by the impeller 300 at different positions is different, and the pressure difference suffered by the impeller 300 may generate resistance to the rotation of the impeller 300, which affects 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 the rotation, increasing the noise of the rotation of the impeller 300.

According to the pump shell assembly 1000 of the washing pump, water flow enters the drainage pump shell 100 through the pump suction inlet 14, the water flow in the drainage pump shell 100 flows to the water inlet end 301 of the impeller 300 through the inner inlet 220, and then flows into the impeller 300 to achieve acceleration and pumping of the water flow. Through adopting any one of the above-mentioned embodiments's drainage pump case 100, drainage pump case 100 has the effect that makes rivers turn to and make rivers flow more steadily, thereby it is comparatively steady to flow from the rivers that inlet 13 of drainage pump case 100 flowed into impeller 300, can reduce the pressure differential that receives when impeller 300 rotates, improve the drive effect of impeller 300 to rivers, guarantee the flow efficiency of rivers in pump case subassembly 1000, and simultaneously, can reduce the vibration that impeller 300 rotated the production, reduce vibration and the noise that pump case subassembly 1000 work produced.

In some embodiments, as shown in fig. 5 and 6, one end surface of the main pump casing 200 is an auxiliary leading end surface S3, the inner inlet 220 is provided on the auxiliary leading end surface S3, and the auxiliary leading end surface S3 is located in the mounting opening 13. The auxiliary leading end surface S3 is annular and is a curved surface, and the auxiliary leading end surface S3 extends towards the first end p1 of the circumferential surface S1 of the leading cavity along the radial inward direction.

Through the cooperation of the auxiliary guide end surface S3 and the drainage pump shell 100, the water inlet guide 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 guide cavity 10 and only can flow to the main pump shell 200. The auxiliary leading end surface S3 is shaped like a horn, on one hand, water flow is promoted to gather towards the center along the auxiliary leading end surface S3 so as to be guided to the inner inlet 220, turbulence caused by the water flow along the radial outer flow is reduced, and the water flow is restrained to flow to the impeller 300 along the axial direction as far 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 drainage channel 101 and the lower drainage channel 102 as much as possible under the guidance of the auxiliary guide end surface S3, so that the water flow is finally guided to the main pump shell 200 along the drainage boss 16 as much as possible. Therefore, the auxiliary guide end surface S3 also has the function of converging water flow, which is beneficial to weakening the radial rotational flow of the water flow, so that the water flow flows to the impeller 300 along the axial direction.

The shape of the auxiliary lead end surface S3 in a cross section passing through the axis L of the pump housing assembly 1000 in this application is two lines, each of which is referred to herein as an end surface plain line. The shape of each end face element line can be selected in many ways. In some alternatives, the end face plain is a straight or curved line with one end forward and the other end rearward, the rearward end being closer to the axis L of the pump casing assembly 1000. In other alternatives, the end face prime line is composed of a plurality of line segments, and the like.

Specifically, the auxiliary leading end surface S3 is similar to a conical cylinder surface as a whole. In the direction towards the end surface S2 of the guide cavity, the auxiliary guide end surface S3 can be changed in an equal diameter mode or in an unequal diameter mode.

In the present embodiment, the inner inlet 220 faces the water inlet 301 of the impeller 300 according to the characteristics of the washing pump B, so that the water flows to the impeller 300 along the axial direction. The axis of the impeller 300 of the washing pump B is used as the axis L of the whole washing pump B, and is also used as 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 at various locations along the axis, where the cross-sectional shape of the inner inlet 220 is the shape of a cross-section taken perpendicular to the axis. For example, the inner inlet 220 may be oval in shape adjacent one end of the draft pump casing 100 and the inner inlet 220 may be circular in shape adjacent one end of the impeller 300. Preferably, the cross-sectional shape of the inner inlet 220 is circular everywhere on the axis. Optionally, the inner inlet 220 axis coincides with the axis L of the pump casing assembly 1000, i.e., coincides with the axis of the impeller 300.

Alternatively, the cross-sectional size of the inner inlet 220 may be the same or different throughout the axis. Further alternatively, the cross-sectional size of the inner inlet 220 may vary along a certain rule when the cross-sectional size varies from place to place.

The tendency of the sectional size in the axial direction of the inner inlet 220 is not limited. For example, the inner inlet 220 is a straight opening having a constant cross-sectional area in a direction from the first end p1 to the second end p2, 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 tapered opening having a gradually decreasing cross-sectional area in a direction from the first end p1 to the second end p2, and the inner inlet 220 is tapered. At this time, since the flow of the water flowing into the inner inlet 220 is stable, the cross section of the inner inlet 220 is gradually reduced along the flow direction of the water to accelerate the flow velocity of the water, so that the water flows into the impeller 300 at an accelerated speed, thereby improving the acceleration of the impeller 300 on the water. As another example, the inner inlet 220 is a tapered opening having a gradually decreasing cross-sectional area, and the inner inlet 220 is a diverging shape. Such a configuration of the inner inlet 220 may serve to slow the flow of water when the flow of water into the inner inlet 220 is excessive.

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

It can be understood that the flow straightening ribs 250 have a blocking effect on the water flow of the rotational flow in the inner inlet 220, and do not block the water flow of the axial flow in the inner inlet 220, so that the rotational flow generated in the inner inlet 220 by the water flow is reduced, it is ensured that the water flow can 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 flow efficiency of the water flow in the pump shell assembly 1000 is improved.

In the present application, the arrangement manner of the flow straightening rib 250 is not limited, and the structure of the flow straightening rib 250 needs to have a blocking effect on the water flow flowing in the inner inlet 220 in the radial direction, and does not block the water flow flowing in the inner inlet 220 in the axial direction. For example, in the example of FIG. 5, the fairing ribs 250 are provided as cross partitions extending in the axial direction of the inner inlet 220. Also for example, the flow straightener 250 may be provided as a "well" shaped cross partition within the inner inlet 220 extending axially of the inner inlet 220. Even further, the flow straightener 250 may be provided as a mesh partition extending in the axial direction of the inner inlet 220 within the inner inlet 220.

Alternatively, the rectifying rib 250 may have a cross shape or a straight shape, and the rectifying rib 250 may have other shapes, which is not limited herein.

In some embodiments, as shown in fig. 6, the edge line n2 of the inner inlet 220 facing the water inlet guiding cavity 10 to the end of the guiding boss 16 forms an inner conical cavity 11, the cross-sectional area of the inner conical cavity 11 passing through the axis of the guiding boss 16 is E1, the cross-sectional area of the pump inlet 14 in the direction perpendicular to the axis L2 of the pump inlet 14 is E2, and half of the cross-sectional area E2 is E3, and satisfies the following conditions: e1 is within 90% to 110% of E3.

Even further, E1 is equal to E3, i.e. the cross-sectional area E1 of the inner conical cavity 11 in the direction passing through the axis of the drainage boss 16 is half the cross-sectional area E2 of the pump suction port 14 in the direction perpendicular to the axis L2 of the pump suction port 14. Therefore, the flow cross-sectional area of the drainage boss 16 can be limited to be approximately half of the flow area of the pump suction inlet 14, so that a good speed-increasing and pressure-reducing effect can be achieved, and water flow can rapidly enter the main pump shell 200 after gathering.

Specifically, as shown in the example of fig. 6, the inlet flow rate of the drain pump casing 100 is substantially the inflow area of the pump inlet 14, i.e., 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 inlet 14 is a circular opening, the cross-sectional area E2 of the pump inlet 14 in the direction perpendicular to the axis L2 is the circular area.

In some schemes, the axis of the drainage boss 16 coincides with the axis L1 of the water inlet drainage 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 tapered, the inner tapered cavity 11 is a tapered cavity from the tapered tip to the edge line n2 of the inner inlet 220. When the end of the drainage boss 16 is a spherical crown surface, as shown in fig. 6, the inner tapered cavity 11 is a cone-like cavity from the spherical crown surface to the edge line n2 of the inner inlet 220.

According to the embodiment of the present invention, the washing pump B comprises the pump housing assembly 1000 and the impeller 300 of the washing pump of any of the above embodiments, and the impeller 300 is disposed in the impeller cavity 210 of the main pump housing 200.

According to the utility model discloses washing pump B, through the pump case subassembly 1000 that sets up the washing pump of any above-mentioned embodiment, rivers are more steady in the flow of washing pump B, can improve the drive effect of pump case subassembly 1000 to rivers, reduce the vibration that pump case subassembly 1000 work produced simultaneously. Thereby improving the cleaning effect of the washing pump B and reducing the vibration of the washing pump B during working.

In some embodiments, as shown in fig. 6, the washing pump B further includes: the heater 600, the heater 600 is set up in the leading chamber of intaking 10. Therefore, the water flow is heated before entering the impeller 300, and the water flow is fully stirred when flowing 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. And the water flow in the water inlet guide cavity 10 is subjected to steering, and the flow distance of the water flow is lengthened through the flow guide structure 15, so that the heat of the heater 600 can be fully absorbed by the water flow, 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 and also along the heater 600. The heater 600 is arranged in such a way, on one hand, the flowing direction of water flow capable of being guided is reduced, the flowing resistance of the water flow is reduced, on the other hand, the heater 600 is effectively integrated with the upper drainage channel 101 and the lower drainage channel 102, and the size of the washing pump B is further reduced.

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 driving 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 pump is arranged in the washing electric appliance a, the washing pump is the washing pump B described in the above embodiment, and the structure of the washing pump B is not described again here.

According to the utility model discloses washing electrical apparatus A through setting up above-mentioned washing pump B, is favorable to improving the washing effect, reduces energy consumption, reduces vibration, noise.

Specifically, the washing appliance a may be a dishwasher, a washing machine, or the like, and may be other devices requiring the 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 wash pump, the pump housing assembly 1000 of the wash pump, and the dishwashers and washing machines 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, references to the description of the terms "embodiment," "example," etc., mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (15)

1. A drainage pump shell of a washing pump is characterized in that a water inlet drainage cavity is formed in the drainage pump shell, the peripheral surface of the water inlet drainage cavity is a drainage cavity peripheral surface, a pump suction inlet is formed on the drainage cavity peripheral surface, and the axial two 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 connecting a main pump shell of the washing pump.

2. The pump casing of claim 1, wherein the drainage boss is a solid of revolution, the peripheral surface of the drainage chamber is a cylindrical surface, and the drainage boss is coaxially disposed with the peripheral surface of the drainage chamber.

3. The pump casing of claim 1, wherein the end of the drain boss is a spherical crown surface that is convexly disposed toward the mounting opening.

4. The pump casing of claim 3, wherein said flow directing projection has two symmetrical flow directing curves in a cross-section taken along an axis passing through said flow directing projection, each of said flow directing curves comprising: the inner convex arc line segment and the outer convex arc line segment 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 pump according to any of claims 1 to 4, wherein the pump inlet is provided with a tongue projection on the circumferential surface of the pump chamber, said tongue projection being spaced apart from the pump inlet.

6. The pump according to claim 5, wherein the tongue projection extends in a direction parallel to the axis of the inlet guide chamber, the tongue projection being disposed opposite the pump inlet.

7. The pump casing of any one of claims 1 to 4, wherein the axis of the inlet guide chamber is in the height direction, and the height of the guide projection is at least half of the height of the inlet guide chamber.

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

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

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

9. The pump casing assembly of a washing pump according to claim 8, wherein the inner inlet is at an edge line of one end facing the water inlet guide cavity, an inner conical cavity is formed to the end of the guide boss, the cross-sectional area of the inner conical cavity passing through the axis of the guide boss is E1, the cross-sectional area of the pump suction inlet in the direction perpendicular to the axis of the pump suction inlet is E2, and half of the cross-sectional area E2 is E3, and the cross-sectional areas are as follows: e1 is within 90% to 110% of E3.

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

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

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

12. A pump casing assembly for a wash pump according to any of claims 8 to 11, further comprising a fairing rib provided in the inner inlet.

13. A washing pump, comprising:

a pump housing assembly for a wash pump according to any of claims 8 to 12;

an impeller disposed within an impeller cavity of a main pump casing of the pump casing assembly.

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

15. Washing appliance, characterized in that it comprises a washing pump according to claim 13 or 14.

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