CN211511705U - Cleaning machine - Google Patents

Abstract

The utility model provides a cleaning machine, including engine body base, water pump and spray arm, engine body base has the return water chamber, and the water pump includes pump case, impeller and motor, and the spray arm has the runner chamber. The axial flow type blades of the impeller extend spirally around the axial direction of the central shaft, at least two centrifugal blades are arranged around the central shaft at equal intervals, and the length of each centrifugal blade extends along the axial direction; the diameter of the axial flow type blade is larger than that of the centrifugal type blade, and the diameter is gradually reduced from the water inlet end to the water outlet end; the radial diameter of the pump shell at the water inlet end is larger than that of the pump shell at the water outlet end, and the radial diameter of the pump shell gradually decreases from the water inlet end to the water outlet end and is matched with the size of the blade; the axial length ratio of the axial flow type blades to the axial length of the centrifugal type blades is 2-9. The water inlet end is positioned in the water return cavity. The water outlet end is positioned in the flow passage cavity. The utility model discloses not only can absorb water fast, the pump lift is high moreover, can guarantee the cleaning performance.

Description

Cleaning machine

Technical Field

The utility model relates to a tableware automatic cleaning equipment specifically relates to a cleaning machine.

Background

The household cleaning machine usually adopts water pump drive rivers to treat by the spray arm about the washings about from top to bottom spray and erode to realize the cleaning performance, centrifugal pump is chooseed for use to general water pump, relies on the rotatory centrifugal force that produces of impeller to make the water in the pump case raise out through the pipeline and supply with the spray arm from the delivery port, forms the negative pressure in the pump case simultaneously and makes water get into from the water inlet, and the water that gets into the spray arm is spout from the spray arm apopore, treats the washing object and washes.

However, in the cleaning process, the water return efficiency is reduced due to the blockage of the filter screen, and particularly when the water level of the water return cup is low and is at the water inlet of the water pump, the water pump is difficult to have an ideal water raising height, so that the cleaning performance is seriously influenced. On the other hand, water in the pump case is pumped out from the water outlet and is supplied to the spray arm through the pipeline, so that water pressure loss of water flow can be caused, the jetting force of a water outlet hole of the spray arm is reduced, and the cleaning performance can be influenced.

For the above reasons, it is necessary to improve the existing cleaning machine to ensure that the water pump has a sufficient water pumping height and the water outlet holes of the spray arms have a sufficient spraying force, so as to achieve the cleaning effect.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems in the prior art, the utility model provides a cleaning machine, which comprises a machine body base, a water pump and a spray arm, wherein the machine body base is provided with a concave water return cavity, the water pump comprises a pump shell, an impeller and a motor arranged at the bottom of the water return cavity, the pump shell is provided with a water inlet end, a water outlet end and a containing cavity, the water inlet end is provided with a water pump water inlet, the water outlet end is provided with a water pump water outlet, and the containing cavity is communicated with the water pump water inlet and the water pump water outlet; the impeller is arranged in the accommodating cavity and comprises a central shaft and blades, an output shaft of the motor is connected with the central shaft, the spray arm is provided with a spray arm water inlet, a spray arm water outlet and a flow passage cavity, and the flow passage cavity is communicated with the spray arm water inlet and the spray arm water outlet. The water inlet end is positioned in the water return cavity; the water outlet end is positioned in the flow passage cavity. The blades include axial flow blades and centrifugal blades; the axial flow blades are close to the water inlet end, and the axial flow blades axially and spirally extend around the central shaft; the centrifugal blades are close to the water outlet end, at least two centrifugal blades are wound on the central shaft at equal intervals, and the length of each centrifugal blade extends along the axial direction; the diameter of the axial flow type blade is larger than that of the centrifugal type blade, and the diameter of the axial flow type blade is gradually reduced from the water inlet end to the water outlet end; the radial diameter of the pump shell at the water inlet end is larger than that of the pump shell at the water outlet end, and the radial diameter of the pump shell gradually decreases from the water inlet end to the water outlet end and is matched with the size of the blade; the axial length ratio of the axial flow type blades to the axial length of the centrifugal type blades is 2-9.

The cleaning machine of the utility model has the advantages that through the arrangement of the water pump, when the impeller rotates, the axial flow type blade can quickly push the fluid to flow upwards axially; meanwhile, the diameter of the axial flow type blade is larger than that of the centrifugal type blade, the diameter of the axial flow type blade is gradually reduced from the water inlet end to the water outlet end, the radial diameter of a pump shell at the water inlet end is larger than that of a pump shell at the water outlet end, the radial diameter of the pump shell is gradually reduced from the water inlet end to the water outlet end and is matched with the size of the blade, the axial flow type blade and the centrifugal type blade can be conveniently arranged in the pump shell, the axial sectional area is gradually reduced along the flowing direction of the fluid based on the arrangement, the fluid speed is inevitably increased under the condition that the power of the water pump is unchanged and the flow rate of the fluid is invariable, the flow speed of the fluid at the centrifugal water outlet end is also increased, the water quantity kinetic energy at the water outlet end is. In addition, the water inlet end provided with the water inlet of the water pump is positioned in the water return cavity, the water outlet end provided with the water outlet of the water pump is positioned in the runner cavity of the spray arm, and water flow directly enters the spray arm from the water return cavity through the pump shell, so that the water can be quickly absorbed, and the water flow directly enters the runner cavity of the spray arm from the water outlet of the water pump, so that the pipeline connection between the water pump and the spray arm is reduced, and the water pressure loss of the water flow is avoided; furthermore, the final pumping height of the water pump and the jet force of water flow of a water outlet hole of the spray arm can be improved, the cleaning efficiency is effectively improved, and the cleaning effect is guaranteed. In addition, the ratio of the axial length of the axial flow type blade to the axial length of the centrifugal type blade is 2-9, so that the problems that the ratio is too small, no water pressure exists, the lift is low, the ratio is too high or only the hydraulic loss of the axial flow type blade is large are solved.

Illustratively, one end of the axial flow type blade far away from the water inlet end extends out of the water return cavity. Based on this, the water pump has enough water pressure and carries the fluid to the spray arm, can improve the water pump lift, promotes the cleaning performance of cleaning machine.

Illustratively, the radial diameter of the pump housing at the water inlet end smoothly transitions to the radial diameter of the pump housing at the water outlet end. So set up, the radial diameter of pump case reduces and smooth transition gradually from the end of intaking to the end of play water, can with the impeller adaptation well.

Illustratively, the central shaft includes a first shaft connected to an output shaft of the motor and a second shaft disposed on the pump housing at the water outlet end, a central axis of the first shaft is collinear with a centerline axis of the second shaft, the axial flow blades are disposed about the first shaft, and the centrifugal blades are disposed about the second shaft. Therefore, the impeller can adopt a split structure, when in processing, the first shaft and the axial flow type blade can be integrally processed and formed, and the second shaft and the centrifugal type blade can be integrally processed and formed with the pump shell, so that the processing and the manufacturing are convenient.

Illustratively, the water pump inlet is disposed circumferentially of the pump housing at the water inlet end. By the arrangement, water flow flows in from the side surface of the containing cavity and directly enters the flow channel formed by the axial flow type blades, and unnecessary resistance on the fluid is avoided, so that the fluid speed is reduced.

Illustratively, the water pump water outlets are arranged on the circumferential direction of the pump shell at the water outlet end, and the number of the water pump water outlets is equal to that of the centrifugal blades. With this arrangement, the fluid will flow out from the side of the pump casing by the centrifugal force of the centrifugal vanes without generating an impact force on the pump casing in the axial direction.

Exemplarily, the motor is provided with a motor end cover, a motor mounting hole is formed in the bottom of the water return cavity, and the motor end cover is mounted inside the machine body base and covers the motor mounting hole. So set up, can be easy to assemble and fixed water pump's motor.

Exemplarily, a first clamping piece is arranged on the water inlet end, a first clamping piece is arranged on the motor end cover, and the first clamping piece is clamped with the first clamping piece. Through the setting of first clip spare and first joint spare, can conveniently be connected pump case and motor, and easily installation and dismantlement.

Illustratively, the center shaft has a mounting hole in the center, and the output shaft of the motor passes through the motor end cover and extends into the mounting hole. So set up, can fix the impeller on the output shaft of motor, make the impeller rotate along with the output shaft of motor.

Exemplarily, a middle shell is connected between the pump shell at the water inlet end and the pump shell at the water outlet end, a circle of second clamping piece is formed on the outer wall of the middle shell, a second clamping piece is arranged on the spray arm, and the second clamping piece is connected with the second clamping piece to axially limit the spray arm. So, connect through second joint spare and second card pulling piece cooperation and can restrict the spray arm to rivers direction axial motion, make the spray arm rotate around the pump case, and convenient to detach, convenience of customers cleans at ordinary times and manages.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a cross-sectional view of a bottom structure of a washing machine according to an exemplary embodiment of the present invention;

FIG. 2 is an exploded view of the bottom structure of the washer of FIG. 1;

FIG. 3 is an enlarged view of the J portion of FIG. 1;

fig. 4 is an exploded view of a water pump of a washer according to an exemplary embodiment of the present invention;

FIG. 5 is a block diagram of the pump casing of FIG. 4;

FIG. 6 is a block diagram of the impeller of FIG. 4;

FIG. 7 is a block diagram of the impeller of FIG. 4 (viewed from another direction);

fig. 8 is a structural view of a water pump (with a motor removed) of a washing machine according to another exemplary embodiment of the present invention; and

fig. 9 is a structural view of the pump casing in fig. 8.

Wherein the figures include the following reference numerals:

100. a water pump; 10. an impeller; 10', an impeller; 110. a central shaft; 110', a central axis; 111. mounting holes; 111', mounting holes; 120. a blade; 121. an axial flow blade; 121', axial flow blades; 122. a centrifugal blade; 20. a pump housing; 20', a pump housing; 21. a water inlet end; 21', a water inlet end; 211. a water inlet of the water pump; 211' and a water inlet of the water pump; 212. a first clip member; 212', a first clamping piece; 22. a water outlet end; 221. a water outlet of the water pump; 22', a water outlet end; 221' and a water outlet of the water pump; 222. a centrifugal blade; 224. a shaft body; 23. a middle housing; 231. a second clip member; 232. a first end; 234. a second end; 23', a middle shell; 231', a second clamping piece; 24. an accommodating cavity; 24', an accommodating cavity; 30. a motor; 31. an output shaft; 32. a motor end cover; 321. a first engaging member; 40. a machine body base; 401. an upper surface; 41. a water return cavity; 42. a motor mounting hole; 44. an inner surface; 46. an outer surface; 50. a spray arm; 51. a spray arm water inlet; 52. a runner cavity; 521. a middle cavity; 522. two side runners; 53. a spray arm water outlet; 54. a second engaging member; 60. filtering with a screen; 61. a through hole; 62. an upper convex net body.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

Referring to fig. 1 to 3, the washing machine of the present invention may be used for washing dishes, vegetables, fruits, etc. and includes a machine body base 40, a water pump 100 and a spraying arm 50, wherein a washing space (not shown) is formed above the machine body base 40 to accommodate the dishes, vegetables, fruits, etc. to wash them. The body base 40 has a recessed return chamber 41, and the cleaned water flows back to the return chamber 41 and is pumped to the spray arm 50 by the water supply pump 100.

The spray arm 50 has a spray arm inlet 51, a spray arm outlet 53 and a flow passage chamber 52 communicating the spray arm inlet 51 with the spray arm outlet 53.

The water pump 100 includes a pump housing 20, an impeller 10, and a motor 30 disposed at the bottom of the water return chamber 41, the pump housing 20 has a receiving cavity 24 therein, and the impeller 10 is disposed in the receiving cavity 24. The pump housing 20 includes a water inlet end 21 and a water outlet end 22. The water inlet end 21 is provided with a water pump water inlet 211, the water outlet end 22 is provided with a water pump water outlet 221, and the accommodating cavity 24 is communicated with the water pump water inlet 211 and the water pump water outlet 221. The water inlet end 21 is positioned in the water return cavity 41; the outlet end 22 is located within the flow-path cavity 52.

By way of illustration, the pump housing 20 may further include a middle housing 23, the middle housing 23 is connected between the water inlet end 21 and the water outlet end 22, and the water inlet end 21, the middle housing 23 and the water outlet end 22 may be connected together or may be integrally formed.

Because the pump case 20 comprises the water inlet end 21 and the water outlet end 22, the water inlet end 21 provided with the water inlet 211 of the water pump is positioned in the water return cavity 41, the water outlet end 22 provided with the water outlet 221 of the water pump is positioned in the flow channel cavity 52 of the spray arm 50, and water flow directly enters the spray arm 50 from the water return cavity 41 through the pump case 20, the water can be quickly absorbed, and the water flow directly enters the flow channel cavity 52 of the spray arm 50 from the water outlet 221 of the water pump, so that the pipeline connection between the water pump 100 and the spray arm 50 is reduced, and the water pressure loss of the water flow is avoided; furthermore, the final pumping height of the water pump and the jet force of water flow of a water outlet hole of the spray arm can be improved, the cleaning efficiency is effectively improved, and the cleaning effect is guaranteed.

The following is to the water pump in the embodiment of the present invention.

Referring to fig. 3 to 7, a water pump 100 according to an embodiment of the present invention includes a pump housing 20, an impeller 10, and a motor 30 disposed at the bottom of a water return chamber 41.

The pump casing 20 has a receiving cavity 24 therein for accommodating the impeller 10. The pump case 20 comprises a water inlet end 21, a water outlet end 22 and a middle shell 23, the middle shell 23 is connected between the water inlet end 21 and the water outlet end 22, the water inlet end 21 is provided with a water pump water inlet 211, the water outlet end 22 is provided with a water pump water outlet 221, and the accommodating cavity 24 is communicated with the water pump water inlet 211 and the water pump water outlet 221.

The radial diameter of the pump housing at the water inlet end 21 is greater than the radial diameter of the pump housing at the water outlet end 22. Because the radial diameter of rivers passageway sectional area and casing is positive correlation, the radial diameter of the pump case that the end 21 that intakes is greater than the radial diameter of the pump case of the end 22 that goes out can make the discharge increase of water pump water inlet 211 department, and the radial diameter of the pump case of the end 22 that goes out is little, will make the rivers passageway sectional area of water pump delivery port 221 department little, and the velocity of water is big to water pump delivery port 221 kinetic energy increases, can improve the water pump lift, promotes the cleaning performance of cleaning machine.

Illustratively, the radial diameter of the pump housing 20 decreases from the water inlet end 21 to the water outlet end 22. When the pump casing 20 includes the middle casing 23, the middle casing 23 has a first end 232 connected to the water inlet end 21 and a second end 234 connected to the water outlet end 22, and the radial diameter of the middle casing 23 gradually decreases from the first end 232 to the second end 234, so that the radial diameter of the pump casing 20 gradually decreases from the water inlet end 21 to the water outlet end 22 and is adapted to the size of the blade 120 in the following description, it can be understood that, in order to adapt the size of the pump casing 20 to the size of the blade 120, except for "gradually decreasing from the water inlet end 21 to the water outlet end 22", the gradual change rule of the size of the pump casing 20 is also the same as the gradual change rule of the size of the blade 120. So, will make the rivers passageway sectional area reduce gradually, water velocity crescent to water pump delivery port 221 kinetic energy increases, improves the water pump lift, promotes the cleaning performance of cleaning machine.

As shown in fig. 6 and 7, the impeller 10 includes a central shaft 110 and blades 120, and the blades 120 include axial flow blades 121 for causing a fluid to flow axially and centrifugal blades 122 for causing a fluid to flow radially, where the axial flow blades 121 are blades capable of providing an axially upward propelling force to a fluid and causing a fluid to flow axially, and the centrifugal blades 122 are blades capable of providing a radially outward propelling force to a fluid and causing a fluid to flow radially. In order to provide an axial upward propelling force to the fluid and to make the fluid flow in the axial direction, the axial flow blades 121 extend spirally in the axial direction around the central shaft 110. In order to provide a radially outward propelling force to the fluid and to enable the fluid to flow radially, at least two centrifugal blades 122 are provided around the central shaft 110 at equal intervals, and the length of the centrifugal blades 122 extends in the axial direction. The utility model discloses in, in order to guarantee the feed liquor flow and improve fluid velocity, axial-flow blade 121's diameter D is greater than centrifugal blade 122's diameter D, according to the fluid flow direction, axial-flow blade 121 is located centrifugal blade 122's upper reaches, and axial-flow blade 121's diameter reduces from upper reaches to low reaches gradually. It should be noted that, since the diameter D of the axial flow blade 121 is gradually changed, in order to improve the fluid velocity, the minimum diameter D of the axial flow blade 121 is larger than the diameter D of the centrifugal blade 122.

Based on the above arrangement, when the impeller 10 rotates, the axial flow type blades 121 can rapidly push the fluid to flow upward axially; meanwhile, the diameter of the axial flow type blade 121 is larger than that of the centrifugal type blade 122, and the axial flow type blade 121 is located at the upstream of the centrifugal type blade 122 according to the flowing direction of the fluid, the diameter of the axial flow type blade 121 is gradually reduced from the upstream to the downstream, namely the axial sectional area is gradually reduced along the flowing direction of the fluid, the fluid speed is inevitably increased under the condition that the power of the water pump is not changed and the fluid flow is not changed, the flow velocity of the fluid at the centrifugal water outlet is also increased, the water quantity kinetic energy of the water outlet 221 of the water pump is also increased, the pressure of the water outlet 221 of the water.

Additionally, the utility model discloses in also having the requirement to the axial length of blade, axial-flow type blade 121's axial length is 2 ~ 9 with centrifugal blade 122's axial length ratio, can avoid the ratio too little no water pressure, the lift is low, the ratio too high or only axial-flow type blade 121 loss of water pressure big problem.

In a preferred embodiment, the axial length of the axial flow blade 121 needs to be long enough to make the end of the axial flow blade 121 far away from the water inlet end 21 protrude out of the water return chamber 41. Based on this, the water pump has enough water pressure and carries the fluid to spray arm 50, can improve the water pump lift, promotes the cleaning performance of cleaning machine. It should be noted that, with reference to fig. 1 and fig. 2, since the water return cavity 41 is formed by recessing the upper surface 401 of the machine base 40, one end of the axial flow blade 121 away from the water inlet end 21 extends out of the water return cavity 41, that is, the end of the axial flow blade 121 away from the water inlet end 21 is higher than the upper surface 401 of the machine base 40. So, the water pump has sufficient water pressure and carries the fluid to spray arm 50, can improve the water pump lift, promotes the cleaning performance of cleaning machine.

Further, the radial diameter of the pump housing at the water inlet end 21 smoothly transitions to the radial diameter of the pump housing at the water outlet end 22. So set up, the radial diameter of pump case reduces gradually and smooth transition from the end of intaking to the end of play water, can be with impeller 10 adaptation well.

Further, the water pump inlet 211 is provided in the circumferential direction of the pump case at the water inlet end 21. With this arrangement, the fluid flows from the side of the housing cavity 24 and directly enters the flow channel formed by the axial flow blades 121, thereby avoiding unnecessary resistance to the fluid and reducing the fluid speed. The number of the water pump inlets 211 can be one or more.

Further, the water pump outlets 221 are disposed on the circumferential direction of the pump housing at the water outlet end 22, the number of the water pump outlets 221 is equal to the number of the centrifugal blades 122, for example, three centrifugal blades 122 are provided, three water pump outlets 221 are provided, and the circumferential ends of the three centrifugal blades 122 and the three water pump outlets 221 are respectively in one-to-one correspondence. So configured, fluid will flow out of the sides of the pump casing 20 by the centrifugal force of the centrifugal vanes 122 without creating an impact force on the pump casing 20 in the axial direction.

The motor 30 has an output shaft 31 and a motor cover 32, and the output shaft 31 of the motor is connected to the central shaft 110 of the impeller 10. The bottom of the water return cavity 41 is provided with a motor mounting hole 42 for conveniently mounting and fixing the motor 30, the motor 30 is fixed below the machine body base 40 through a screw or a snap connection, specifically, below an outer surface 46 of the machine body base 40, the output shaft 31 of the motor 30 passes through the motor mounting hole 42 and extends into the water return cavity 41 so as to be connected with the central shaft 110 of the impeller 10, the motor end cover 32 is mounted on an inner surface 44 of the machine body base 40 and covers the motor mounting hole 42, it should be noted that "the inner surface 44" and "the outer surface 46" are relative to the water return cavity 41, the inner surface 44 is located in the water return cavity 41, and the "the outer surface 46" is located outside the water return cavity 41.

The pump housing 20 is fixedly attached to the motor end cap 32. Through the setting of motor end cover 32, not only can make things convenient for being connected of pump case 20 and motor 30, can also make things convenient for whole water pump 100 to fix on the cleaning machine. Specifically, a first clamping piece 321 may be disposed on the motor end cover 32, a first clamping piece 212 is disposed on the pump casing of the water inlet end 21, and the first clamping piece 321 is clamped with the first clamping piece 212. The first clamping part 321 can be a clamping groove, and the first clamping part 212 can be a buckle, so that the pump case 20 and the motor 30 can be conveniently connected through the clamping fit of the clamping groove and the buckle, and the pump case is easy to install and disassemble. To facilitate the provision of the catch 321, a lug may project from the periphery of the face of the motor end cap 32 opposite the impeller 10, and the lug may be notched to form the catch 321. In an embodiment not shown, a buckle may also be disposed on the motor end cover 32, and a slot capable of clamping the buckle is disposed on the pump casing 21 at the water inlet end.

Further, the center shaft 110 has a mounting hole 111 at the center, and the output shaft 31 of the motor passes through the motor cover 32 and extends into the mounting hole 111. Thus, the impeller 10 can be fixed to the output shaft 31 of the motor, and the impeller 10 can be rotated along with the output shaft 31 of the motor. The length of the mounting hole 111 may be equal to that of the central shaft 110, i.e., the mounting hole 111 penetrates from one end to the other end of the central shaft 110. Of course, the length of the mounting hole 111 may be smaller than the length of the central shaft 110. In order to ensure a stable connection, the output shaft 31 of the motor can be fixed with the central shaft 110 by combining a screw or a snap ring.

In order to facilitate the connection of the spray arm 50 to the water pump 100, the flow passage chamber 52 of the spray arm 50 includes a middle cavity 521 and two side flow passages 522, the middle cavity 521 is located in the middle of the spray arm 50, and the two side flow passages 522 are located on two sides of the middle cavity 521. Thus, when the spray arm 50 is mounted on the pump housing 20, the outlet end 22 extends into the middle cavity 521, and the inner side surface of the spray arm inlet 51 is in clearance fit with the outer side surface of the pump housing at the outlet end 22, so that the water flowing out of the water pump outlet 221 can smoothly flow into the middle cavity 521 through the spray arm inlet 51 and then flow into the two side channels 522.

In order to limit the axial movement of the spray arm 50 towards the water flow direction and to enable the spray arm 50 to rotate around the pump shell 20, a circle of second clamping piece 231 is formed on the outer wall of the middle shell 23, a second clamping piece 54 is arranged on the spray arm 50, and the second clamping piece 54 is connected with the second clamping piece 231 to axially limit the spray arm. Therefore, the second clamping piece 231 is connected with the second clamping piece 54 in a matched mode to limit the axial movement of the spray arm 50 towards the water flow direction, so that the spray arm 60 can rotate around the pump shell 20, and the spray arm is convenient to detach and convenient for a user to clean and manage at ordinary times. Preferably, the second latch 54 may be at least two rotating pins disposed at the lower portion of the spray arm 50, and the second latch 231 may be a ring of radial ribs.

Further, a filter screen 60 is disposed above the water return chamber 41, and the filter screen 60 can filter contaminants in the washing water flow to prevent the contaminants from entering the water pump 100. Moreover, the filter screen 60 is provided with a through hole 61, the filter screen 60 protrudes upwards at the periphery of the through hole 61 to form an upper convex screen body 62, and when the filter screen 60 is installed above the water return chamber 41, the upper convex screen body 62 covers the outer edge of the first end 232 of the middle housing 23. So set up, simple structure not only, convenient to detach reduces material and installation cost, and convenience of customers cleans at ordinary times simultaneously and manages.

As shown in fig. 8 and 9, a water pump according to still another embodiment of the present invention includes a pump housing 20 ', an impeller 10', and a motor (not shown in the motor drawings, refer to the motor shown in fig. 4).

The pump casing 20 ' has a receiving cavity 24 ' therein for the impeller 10 '. The pump case 20 'comprises a water inlet end 21', a water outlet end 22 'and a middle case 23', the middle case 23 'is connected between the water inlet end 21' and the water outlet end 22 ', a water pump water inlet 211' is arranged on the circumference of the pump case at the water inlet end 21 ', a water pump water outlet 221' is arranged on the circumference of the pump case at the water outlet end 22 ', and the accommodating cavity 24' is communicated with the water pump water inlet 211 'and the water pump water outlet 221'. The radial diameter of the pump housing at the water inlet end 21 ' is larger than that of the pump housing at the water outlet end 22 ', and the radial diameter of the housing 20 ' gradually decreases from the water inlet end 21 ' to the water outlet end 22 ' and is matched with the size of the blades. The difference from the previous embodiment is: the pump casing of the water outlet end 22 'is provided with a shaft body 224 and at least two centrifugal blades 222 which are arranged around the shaft body 224 at equal intervals and extend along the axial direction, the number of the centrifugal blades 222 corresponds to that of the water outlet 221', and the peripheral ends of the centrifugal blades 222 are connected with the water outlet 221 ', so that the centrifugal blades 222 can guide the fluid in the pump casing 20' to move outwards. The centrifugal vanes 222 may be integrally formed with the pump housing at the outlet end 22 'or may be fixedly attached to the pump housing at the outlet end 22'.

The impeller 10 'is disposed in the receiving cavity 24' and is relatively located in the water inlet end 21 'and the middle housing 23', unlike the impeller 10 shown in fig. 6: the impeller 10 'does not include a centrifugal blade, and specifically, the impeller 10' includes a central shaft 110 'and an axial flow blade 121' for axially flowing the fluid, and the axial flow blade 121 'extends axially spirally around the central shaft 110', and since no centrifugal blade is provided, the axial flow blade 121 'can extend axially spirally from one end of the central shaft 110' to the other end. Since no centrifugal blades are included, the radial diameter of the pump housing 20 'tapers from the water inlet end 21' to the water outlet end 22 'and is substantially matched to the size of the axial flow blades 121'.

That is, in the present embodiment, the impeller capable of providing the axial propelling force and the radial centrifugal force to the fluid is actually composed of the central shaft 110 ', the axial flow blades 121 ', the shaft body 224, and the centrifugal blades 222, and if the central shaft 110 ' is defined as a first shaft and the shaft body 224 is defined as a second shaft, as compared with the impeller shown in fig. 6, the central shaft 110 includes the first shaft 110 ' and the second shaft 224, the first shaft 110 ' is connected to the output shaft of the motor, the second shaft 224 is disposed on the pump housing of the water outlet end 22 ', the central axis of the first shaft 110 ' is collinear with the central axis of the second shaft 224, the axial flow blades 121 ' are disposed around the first shaft 110 ', and the centrifugal blades 222 are disposed around the. Therefore, the impeller which can provide axial propelling force and radial centrifugal force to the fluid can adopt a split structure, when in processing, the first shaft 110 'and the axial flow type blades 121' can be integrally processed and formed, and the second shaft 224 and the centrifugal type blades 222 can be integrally processed and formed with the pump shell, thereby being convenient for processing and manufacturing.

In order to facilitate connection with the motor, the center of the central shaft 110 'also has a mounting hole 111', the pump housing of the water inlet end 21 'is provided with a buckle 212', and the outer wall of the middle housing 23 'is formed with a ring of second clamping members 231'. The output shaft of the motor is connected with the central shaft 110 'through the mounting hole 111'; the pump shell 20 'can be buckled on a motor end cover of the motor through the buckle 212'; can be connected with the spray arm 50 through a second clamping piece 231'; for a specific connection manner, reference may be made to the foregoing description, and details will not be described herein.

In order to increase the lift of the water pump, the diameter of the axial flow blade 121 ' is larger than that of the centrifugal blade 222, the axial flow blade 121 ' is located upstream of the centrifugal blade 222 in terms of the fluid flow direction, and the diameter of the axial flow blade 121 ' is gradually reduced from upstream to downstream.

In the water pump of the embodiment, when the impeller 10 'rotates, the axial flow type blade 121' provides an upward driving force to the fluid to enable the fluid to flow upward from the water pump water inlet 211 'of the water inlet end 21' to the water outlet end 22 ', and as the impeller 10' rotates at a high speed along with the motor, the fluid can flow outward under the action of centrifugal force generated by the centrifugal blade 222 in the pump housing of the water outlet end 22 ', so that a water pumping function is realized, in the process of pumping water, bubbles entering the pump housing along with the fluid move upward along the axial flow type blade 121', and due to different densities of the bubbles and the water, the bubbles and the water flow are separated at the centrifugal blade 222, and when encountering the centrifugal blade 222, collision occurs, the bubbles are eliminated, and noise generated by the bubbles in the water pumping process of the water pump.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front", "back", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A cleaning machine comprises a machine body base (40), a water pump (100) and a spray arm (50), wherein the machine body base is provided with a concave water return cavity (41), the water pump comprises a pump shell (20), an impeller (10) and a motor (30) arranged at the bottom of the water return cavity, the pump shell is provided with a water inlet end (21), a water outlet end (22) and an accommodating cavity (24), the water inlet end (21) is provided with a water pump water inlet (211), the water outlet end (22) is provided with a water pump water outlet (221), and the accommodating cavity (24) is communicated with the water pump water inlet and the water pump water outlet; the impeller is arranged in the accommodating cavity (24), the impeller comprises a central shaft (110) and blades (120), an output shaft (31) of the motor is connected with the central shaft (110), the spray arm is provided with a spray arm water inlet (51), a spray arm water outlet (53) and a flow channel cavity (52), and the flow channel cavity (52) is communicated with the spray arm water inlet (51) and the spray arm water outlet (53); the water inlet end (21) is positioned in the water return cavity (41); the water outlet end (22) is positioned in the flow passage cavity (52); the method is characterized in that:

the blades include axial flow blades (121) and centrifugal blades (122);

the axial flow blades (121) are close to the water inlet end (21), and the axial flow blades (121) axially and spirally extend around the central shaft;

the centrifugal blades (122) are close to the water outlet end (22), at least two centrifugal blades (122) are arranged around the central shaft at equal intervals, and the length of each centrifugal blade extends along the axial direction;

the diameter of the axial flow blade (121) is larger than that of the centrifugal blade (122), and the diameter of the axial flow blade is gradually reduced from the water inlet end (21) to the water outlet end (22); the radial diameter of the pump shell of the water inlet end (21) is larger than that of the pump shell of the water outlet end (22), and the radial diameter of the pump shell gradually decreases from the water inlet end (21) to the water outlet end (22) and is matched with the size of the blade;

the axial length ratio of the axial flow type blades to the axial length of the centrifugal type blades is 2-9.

2. The cleaning machine of claim 1 wherein an end of said axial flow blade distal from said water inlet end extends outside of said water return chamber.

3. The cleaning machine of claim 1 wherein the radial diameter of the pump housing at the water inlet end smoothly transitions to the radial diameter of the pump housing at the water outlet end.

4. The washing machine according to claim 1, characterized in that the central shaft (110) comprises a first shaft (110 ') and a second shaft (224), the first shaft (110') being connected to the output shaft (31) of the motor, the second shaft (224) being arranged on the pump housing at the water outlet end, the central axis of the first shaft being collinear with the central axis of the second shaft, the axial blades being arranged around the first shaft, and the centrifugal blades being arranged around the second shaft.

5. The washing machine as claimed in any one of claims 1 to 4 wherein the water pump inlet is disposed circumferentially of the pump housing at the water inlet end.

6. The washing machine as claimed in any one of claims 1 to 4 wherein the water pump outlets are arranged circumferentially of the pump housing at the water outlet end and the number of water pump outlets is equal to the number of centrifugal vanes.

7. The washing machine according to any one of claims 1 to 4, characterized in that the motor (30) has a motor end cover (32), the bottom of the water return chamber (41) is provided with a motor mounting hole (42), and the motor end cover (32) is mounted on the inner surface of the machine body base (40) and covers the motor mounting hole.

8. The cleaning machine of claim 7, wherein the water inlet end is provided with a first clamping member, the motor end cover is provided with a first clamping member (321), and the first clamping member is clamped with the first clamping member.

9. The washing machine as claimed in claim 7 wherein the center shaft has a mounting hole in the center thereof, the output shaft of the motor passing through the motor end cap and protruding into the mounting hole.

10. The cleaning machine according to any one of claims 1 to 4, wherein a middle shell is connected between the pump shell of the water inlet end and the pump shell of the water outlet end, a circle of second clamping pieces are formed on the outer wall of the middle shell, a second clamping piece (54) is arranged on the spray arm (50), and the second clamping piece (54) is connected with the second clamping pieces to axially limit the spray arm.

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