CN109973426B

CN109973426B - Water pump impeller for cleaning machine and application thereof

Info

Publication number: CN109973426B
Application number: CN201711463044.8A
Authority: CN
Inventors: 徐慧; 郑峰; 顾洪良
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2017-12-28
Filing date: 2017-12-28
Publication date: 2021-07-23
Anticipated expiration: 2037-12-28
Also published as: CN109973426A

Abstract

The invention relates to a water pump impeller for a cleaning machine, which comprises a second impeller and a first impeller, wherein the second impeller can disperse fluid at a first end along the radial direction, the first impeller can suck the fluid in the axial direction, and the first impeller is arranged at a second end of the second impeller and is coaxially arranged with the second impeller; the second impeller comprises a second central shaft and at least two second blades which are arranged at the periphery of the second central shaft at intervals and at least comprise upper sections extending along the radial direction of the second central shaft. During the use, because first impeller is axial, rivers are the biggest at the relative velocity of flow of first impeller outer fringe, can take place the vacuole at first impeller outer fringe at first, and when reacing the second impeller, the vacuole that is close to the outer fringe of second impeller center pin compression outer fringe is received the centrifugal force, makes it can only be close to the outer fringe and moves along the axial, and the vacuole breaks out at the high-pressure zone that the second impeller upper end formed to the development of vacuole has been restricted greatly, has promoted the flow and the lift of pump, and then has improved the cleaning performance.

Description

Water pump impeller for cleaning machine and application thereof

Technical Field

The invention relates to a water pump impeller for a cleaning machine, in particular to a water pump impeller for a cleaning machine, which can be used in the cleaning machine for dishes, fruits, vegetables and the like to improve the cleaning effect.

Background

Before the water pump works, the water pump and the water inlet pipe must be filled with water, then the liquid obtains energy under the action of inertial centrifugal force by means of the impeller rotating at high speed, so that the internal pressure of the liquid can be increased, when the impeller rotates fast, the first blade promotes the water to rotate fast, the liquid flies out of the impeller under the action of the centrifugal force, after the water in the water pump is thrown out, the central part of the impeller forms a vacuum area, then the water in a water source enters the water inlet pipe under the action of atmospheric pressure (or water pressure), and continuous water pumping can be realized after circulation is inexhaustible. The water pump has the advantages of simple structure, easy operation, easy flow regulation, suitability for conveying various materials with special properties and the like, and is widely applied to various fields, such as various industrial places, and various household appliances, such as washing machines, dish washing machines, air conditioners and the like.

In a traditional water pump, an impeller is generally positioned in a closed cavity, so that the structure is complex, and the processing requirement is high. European patent publication EP0807396a2 discloses a dishwasher using an open water pump, which includes a washing chamber for receiving dishes, a spray arm supported at the bottom of the washing chamber, and a pump for pumping out washing liquid to pressurize the spray arm, the pump including an impeller having an inner surface defining a housing for the impeller to allow the washing liquid to be transferred from the housing to a nozzle of the spray arm, the impeller including a first blade bent forward at a lower edge, the bottom of the first blade having a first blade portion of axial flow, the first blade portion of axial flow lifting up the fluid after a start-up of a driving motor under no load, thereby allowing the pump to operate normally. However, in the impeller, the lower section of the first blade is short, the first blade needs to be at a high water level when the first blade draws water in a rotating manner, the water outlet channel is short, foam formed on the surface of the cleaning water such as cleaning solution and food residue is easily drawn into the impeller again, normal water drawing is affected, the amount of drawn water is small, and the flow speed is low, so that normal spraying operation of the rotary spray arm is affected.

In order to solve the above problems, chinese patent application No. CN104235061B, an open water pump (application No. CN201310750285.6), discloses a structure including an upper housing, a lower housing, and an impeller, where the impeller includes a central shaft and a plurality of axially extending first blades uniformly distributed on a circumferential surface of the shaft in a circumferential direction, the first blades are axially divided into an upper section and a lower section connected to each other, an upper housing cavity for housing the upper section of the first blades is formed in the upper housing, a lower housing cavity for housing the lower section of the first blades is formed in the lower housing, a water inlet of the water pump is located below and at a side surface of the lower housing, a water outlet is located at a side surface of the upper housing, at least a bottom of the lower section of the first blades is gradually and smoothly bent on the circumferential surface of the shaft in a rotation direction of the impeller, and a height ratio of the lower section to the upper section of the first blades is 1-5. The impeller can draw water at a low water level, is not easy to cause bubbles formed by cleaning solution or food residues on the water surface to be drawn into the impeller to influence the water drawing, and can draw enough flow from the water inlet. However, since the first blades for the axial pumping and the centrifugal dispersion are integrally formed and the first blade portion for the axial pumping is short, when cavitation bubbles carried in the liquid develop to a certain extent during the pumping, the characteristics of the outer edge of the first blade are affected to cause performance degradation, since the liquid in the flow passage of the centrifugal first blade flows from the axial direction to the radial direction and the density of the liquid is higher than that of the gas, the cavitation bubbles in the liquid are easily separated under the action of the centrifugal force and rapidly expand to block the flow passage, so that the suction performance of the pump is rapidly reduced, and further the flow rate of the discharged water is affected.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a water pump impeller for a cleaning machine, which can improve the flow and the lift by limiting the development of cavitation bubbles in liquid.

The technical scheme adopted by the invention for solving the technical problems is as follows: a water pump impeller for a washing machine, comprising a second impeller capable of radially dispersing a fluid at least at a first end, characterized in that: the first impeller is arranged at the second end of the second impeller and is coaxially arranged with the second impeller; the second impeller comprises a second central shaft and at least two second blades which are arranged at the periphery of the second central shaft at intervals and at least comprise upper sections extending along the radial direction of the second central shaft.

Preferably, the second vane is axially divided into the upper section and the lower section which are connected with each other, and the length of the upper section in the radial direction is larger than that of the lower section in the radial direction.

Preferably, the second blades are arranged at equal intervals on the outer periphery of the second central shaft. Alternatively, the second blades are arranged at a variable interval on the periphery of the second central shaft, for example, two or more second blades form a group, and the interval between two second blades in the same group is smaller than the interval between adjacent second blades in different groups.

Preferably, the thicknesses of the second blades are equal. Alternatively, the thickness of at least one second vane is greater than the thickness of the other second vanes.

Preferably, the thickness of the second blade gradually increases in the fluid flow direction. The thickness of the starting end of the second blade is 1.6-1.9 mm, and preferably 1.8 mm; the thickness of the tail end of the second blade is 1.3-1.5 mm, and preferably 1.5 mm.

Preferably, the thickness of the second blade is gradually reduced in the fluid flow direction. The thickness of the starting end of the second blade is 1.3-1.5 mm, and preferably 1.5 mm; the thickness of the tail end of the second blade is 1.6-1.9 mm, and preferably 1.8 mm.

The utility model provides an use spray arm that has above-mentioned water pump, includes the spray arm body, thereby this spray arm body inside cavity forms the water storage chamber, it has water inlet and apopore that are linked together with this water storage chamber to open on the spray arm body, its characterized in that: the water pump impeller for the cleaning machine is characterized by further comprising a water pump impeller for the cleaning machine, at least part of a second impeller in the water pump impeller for the cleaning machine penetrates through the water inlet to be located in the water storage cavity, and the first impeller is arranged on the upstream of the water inlet according to the flow direction of fluid.

The spray arm comprises a spray arm body and is characterized in that a water inlet of the spray arm body is provided with a flow guide sleeve, at least part of a first impeller is positioned in the flow guide sleeve, and the first impeller, a second impeller, the inner wall of the flow guide sleeve matched with the first impeller and the inner wall of a water storage cavity matched with the second impeller jointly form a water pump.

The utility model provides an use cleaning machine that has above-mentioned spray arm, includes the box and spray arm, the bottom half has local recessed portion at least so that form the waterlogging caused by excessive rainfall region, and the waterlogging caused by excessive rainfall board has been put to this waterlogging caused by excessive rainfall region top lid, spray arm can locate waterlogging caused by excessive rainfall board top, its characterized in that with rotating: the first impeller penetrates through the draining plate, the upper portion of the first impeller is located above the draining plate, and the lower portion of the first impeller is located below the draining plate.

The utility model provides an use cleaning machine that has above-mentioned water pump, includes the box that has the washing chamber, its characterized in that: the water pump impeller for the cleaning machine is provided with a pump shell arranged at the bottom of the box body, the top of the pump shell is provided with a containing cavity which can be connected with the mounting port and is used for collecting water, and the second impeller and the first impeller are arranged on one side of the containing cavity and are used for pumping water in the containing cavity into the box body through the mounting port.

Compared with the prior art, the invention has the advantages that: when the invention is used, because the first impeller is axial, the relative flow velocity of water flow at the outer edge of the first impeller is the maximum, cavitation bubbles can be generated at the outer edge of the first impeller at first, when the fluid reaches the second impeller, the liquid close to the central shaft of the second impeller compresses the cavitation bubbles at the outer edge under the action of centrifugal force, so that the fluid can only move close to the outer edge along the axial direction, and the cavitation bubbles collapse in a high-pressure area formed at the upper end of the second impeller, thereby greatly limiting the development of the cavitation bubbles, improving the cavitation erosion resistance of the second impeller, improving the flow and lift of a pump and further improving the cleaning effect.

Drawings

Fig. 1 is a schematic structural view of a water pump impeller for a washing machine in embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a second impeller in embodiment 1 of the present invention;

FIG. 3 is another schematic structural view of a second impeller in embodiment 2 of the present invention;

fig. 4 is a schematic structural view of a second impeller in embodiment 3 of the present invention;

fig. 5 is a schematic structural view of a second impeller in embodiment 4 of the present invention;

fig. 6 is a schematic structural view of a spray arm in embodiment 7 of the present invention;

FIG. 7 is a schematic structural view of a cleaning machine according to embodiment 8 of the present invention;

FIG. 8 is a schematic view showing another structure of a cleaning machine according to embodiment 8 of the present invention;

fig. 9 is a schematic structural view of a cleaning machine in embodiment 9 of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The water pump impeller for the cleaning machine of the embodiment comprises a first impeller 1 and a second impeller 2, wherein the first impeller 1 is arranged at the upstream of the second impeller 2 according to the fluid flowing direction, and the first impeller 1 is arranged at one end of the second impeller 2 and is coaxially arranged with the second impeller 2 and synchronously rotates. The first impeller 1 is used for drawing water flow in the axial direction, and the second impeller 2 has a certain flow guiding effect on the water flow drawn by the first impeller 1 and enables the fluid to be dispersed in the radial direction.

Specifically, the second impeller 2 includes a second central shaft 21 and a plurality of second blades 22, and the plurality of second blades 22 are arranged at intervals on the outer periphery of the second central shaft 21. The second blades 22 of the present embodiment are arranged at equal intervals on the outer periphery of the second central shaft 21. As shown in fig. 2, the second blade 22 is axially divided into an upper section 221 and a lower section 222 which are connected with each other, the top of the upper section 221 has no shield and extends along the radial direction of the second central shaft 21, i.e. the top of the second impeller 2 is an open structure. The upper section 221 has a length in the radial direction that is greater than the length of the lower section 222 in the radial direction. The lower section 222 is gradually smoothly curved along the rotation direction of the second impeller 2 on the circumferential surface of the second center shaft 21, and the upper section 221 is perpendicular to the circumferential surface of the second center shaft 21. The thickness of each second blade 22 was equal and 1.8 mm.

Example 2:

this example differs from example 1 in that: as shown in fig. 3, the upper section 221 and the lower section 222 of the second vane 22 of the present embodiment are both arranged on the second central shaft 21 in the radial direction of the second central shaft 21. The three second blades 22 form a blade group 20, and in the blade group 20, the length of the upper section 221 of the second blade 22 located in the middle for radial water guiding may be slightly smaller than the length of the upper sections 221 of the second blades 22 located on both sides. The distance between two adjacent blade groups 20 in the circumferential direction is greater than the distance between two adjacent second blades 22 in the circumferential direction.

The thickness of the second vane 22 is uniform, but the radial size distribution is not uniform, so that the force of the second impeller 2 when water is thrown out is also non-uniform, and the water can be sprayed similarly to pulse: the rush is relatively slow, thereby enhancing the dish washing effect.

Example 3:

the present embodiment is different from

embodiments

1 and 2 in that: as shown in fig. 4, the second blades 22 are arranged at intervals of thickness in the circumferential direction in the present embodiment. The lower section of the second vane 22 having a larger thickness may have a length of 0 in the radial direction, and the upper surface is flush with the upper end surface of the second center shaft 21. The second vane 22 having a smaller thickness has a length in the radial direction larger than that of the second vane 22 having a larger thickness.

Example 4:

this example differs from example 1 in that: as shown in fig. 5, the width of at least one second blade 22 in the circumferential direction of the second central shaft 21 is larger than the width of the other second blades 22 in the circumferential direction of the second central shaft 21. The width of the upper section 221 of the wider second impeller 22 gradually increases from the outer peripheral surface of the second central shaft 21 to form a fan-shaped structure 220, so as to ensure that the second impeller maintains a good water-drawing capability during the rotation process, and the central angle of the fan-shaped structure formed by the upper section 221 is 5-90 °.

Example 5:

this example differs from example 1 in that: the thickness of the second vane 22 of the present embodiment gradually increases in the fluid flow direction. The thickness of the starting end of the second blade 22 is 1.6-1.9 mm, preferably 1.8 mm; the thickness of the end of the second blade 22 is 1.3-1.5 mm, preferably 1.5 mm.

Example 6: this example differs from example 1 in that: the thickness of the second vane 22 of the present embodiment is gradually reduced in the fluid flow direction. The thickness of the starting end of the second blade 22 is 1.3-1.5 mm, preferably 1.5 mm; the thickness of the end of the second blade 22 is 1.6-1.9 mm, preferably 1.8 mm.

Example 7:

as shown in fig. 6, this embodiment shows a spray arm applied to any one of embodiments 1 to 6 for a water pump impeller of a cleaning machine, which includes a spray arm body 4, the spray arm body 4 is hollow to form a water storage cavity 41, the spray arm body 4 is provided with a water inlet 411 and a water outlet 412 communicated with the water storage cavity 41, an upper end of a second impeller 2 in the water pump impeller of the cleaning machine penetrates through the water inlet 411 and is located in the water storage cavity 41, and a first impeller 1 is located at an upstream of the water inlet according to a fluid flowing direction.

The second blades 22 of the second impeller 2 of the present embodiment are shaped as a fan-shaped structure with a central angle arranged outwards and a notch 120 at the central angle, and the notch 120 is arranged opposite to the edge of the water inlet 411.

A flow guide sleeve is arranged at the water inlet 411 of the spray arm body 4, at least part of the first impeller 1 is positioned in the flow guide sleeve, and the first impeller 1, the second impeller 2, the inner wall of the flow guide sleeve matched with the first impeller 1 and the inner wall of the water storage cavity 41 matched with the second impeller 2 jointly form a water pump.

Example 8:

as shown in fig. 7 and 8, this embodiment shows a cleaning machine to which the spray arm of embodiment 7 is applied, and the cleaning machine of this embodiment is a water tank type cleaning machine with an opening at the top, but of course, the cleaning machine can also be designed to be a cleaning machine with an opening at the side wall as required. The cleaning machine comprises a box body (not shown) and a spray arm, wherein the box body is at least provided with a local concave part to form a draining area 51, a draining plate 52 is covered above the draining area 51, the spray arm is rotatably arranged above the draining plate 52, a first impeller 1 is arranged through the draining plate 52, the upper part of the first impeller 1 is positioned above the draining plate 52, and the lower part of the first impeller 1 is positioned below the draining plate 52.

The draining area 51 of the present embodiment may be formed as an elongated area gradually depressed from the center toward the periphery as shown in fig. 8, or the draining area 51 may be formed as a partially or entirely wide area by providing the shape of the bottom wall of the draining area 51 or the draining plate 52 as shown in fig. 7.

Example 9:

as shown in fig. 9, this embodiment shows a cleaning machine applied with the water pump in any one of embodiments 1 to 6, including a box 6 having a washing chamber 61, a mounting port 62 is opened at the bottom of the box 6, a water pump impeller for the cleaning machine has a pump housing 14 mounted at the bottom of the box 6, the top of the pump housing 14 has an accommodating chamber 141 connected with the mounting port 62 and used for collecting water, and a second impeller 2 and a first impeller 1 are disposed at one side of the accommodating chamber 141 and used for pumping water in the accommodating chamber 141 into the washing chamber 61 of the box 1 through the mounting port 62.

Claims

1. A water pump impeller for a washing machine, comprising a second impeller capable of radially dispersing a fluid at least at a first end, characterized in that: the first impeller is arranged at the second end of the second impeller and is coaxially arranged with the second impeller; the second impeller comprises a second central shaft and at least two second blades which are arranged at the periphery of the second central shaft at intervals and at least comprise an upper section extending along the radial direction of the second central shaft; according to the fluid flowing direction, the first impeller is arranged at the upstream of a water inlet of the water pump;

the second blade is axially divided into the upper section and the lower section which are connected with each other, and the length of the upper section in the radial direction is larger than that of the lower section in the radial direction;

the width of at least one second blade in the second center shaft circumferential direction is greater than the width of other second blades in the second center shaft circumferential direction, the width of the upper section of the second blade with the greater width gradually increases outwards from the outer peripheral surface of the second center shaft to form a fan-shaped structure, and the central angle of the fan-shaped structure formed by the upper section is 5-90 degrees.

2. The water pump impeller for a washing machine as claimed in claim 1, characterized in that: the second blades are arranged at equal intervals on the periphery of the second central shaft.

3. The water pump impeller for a washing machine as claimed in claim 1, characterized in that: the second blades are arranged on the periphery of the second central shaft at variable intervals.

4. A spray arm with the water pump impeller of any claim 1-3 applied thereto, comprising a spray arm body, wherein the spray arm body is hollow inside to form a water storage cavity, and the spray arm body is provided with a water inlet and a water outlet communicated with the water storage cavity, and is characterized in that: the water pump impeller for the cleaning machine is characterized by further comprising a water pump impeller for the cleaning machine, at least part of a second impeller in the water pump impeller for the cleaning machine penetrates through the water inlet to be located in the water storage cavity, and the first impeller is arranged on the upstream of the water inlet according to the flow direction of fluid.

5. The spray arm of claim 4, wherein: the spray arm comprises a spray arm body and is characterized in that a water inlet of the spray arm body is provided with a flow guide sleeve, at least part of a first impeller is positioned in the flow guide sleeve, and the first impeller, a second impeller, the inner wall of the flow guide sleeve matched with the first impeller and the inner wall of a water storage cavity matched with the second impeller jointly form a water pump.

6. A cleaning machine using the spray arm of claim 4, comprising a box body and the spray arm, wherein the bottom of the box body is at least partially recessed to form a draining area, a draining plate is covered above the draining area, and the spray arm is rotatably arranged above the draining plate, and the cleaning machine is characterized in that: the first impeller penetrates through the draining plate, the upper portion of the first impeller is located above the draining plate, and the lower portion of the first impeller is located below the draining plate.

7. A cleaning machine with the water pump impeller of any one of claims 1-3 applied thereto, comprising a box body with a washing cavity, and is characterized in that: the water pump impeller for the cleaning machine is provided with a pump shell arranged at the bottom of the box body, the top of the pump shell is provided with a containing cavity which can be connected with the mounting port and is used for collecting water, and the second impeller and the first impeller are arranged on one side of the containing cavity and are used for pumping water in the containing cavity into the box body through the mounting port.