CN115726166A

CN115726166A - Washing machine drainage filtration system and washing machine

Info

Publication number: CN115726166A
Application number: CN202111011472.3A
Authority: CN
Inventors: 祝令闯; 王学东; 高升成; 张圣彤; 宋立军
Original assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Washing Machine Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2023-03-03
Also published as: WO2023030011A1

Abstract

The invention discloses a washing machine drainage filtering system and a washing machine, wherein the drainage filtering system comprises: a water outlet; a drain pipe; a drain pump connected to the drain pipe, having a pump chamber and an impeller located in the pump chamber; a primary filtering device which is arranged at the water outlet and is used for filtering hard foreign matters; and the secondary filtering device is arranged between the water outlet and the pump cavity and is used for filtering flexible foreign matters. The primary filtering device is used for filtering hard foreign matters, such as coins, clips and the like, and filtering the hard foreign matters at the water drainage port, so that the hard foreign matters are prevented from entering the water drainage pipe; a secondary filtering device is arranged and used for filtering flexible foreign matters, such as thread scraps, hairs and the like, so that the hard and flexible foreign matters are removed from the washing water entering the pump cavity; the two-stage filtration classification is arranged for filtering the foreign matters, so that the foreign matters can be effectively prevented from entering the drainage pump of the washing machine, and the drainage pump is prevented from being damaged by the foreign matters.

Description

Washing machine drainage filtration system and washing machine

Technical Field

The invention belongs to the technical field of washing machines, and particularly relates to a drainage filtering system of a washing machine and the washing machine with the drainage filtering system.

Background

The pulsator type washing machine of the prior art generally comprises a box body, an outer barrel suspended in the box body, an inner barrel which is arranged in the outer barrel and driven by an outer rotating shaft to rotate, an inner rotating shaft connected with a pulsator at the bottom of the inner barrel, and a filter which is usually arranged on the wall of the inner barrel, wherein the filter passively filters thread scraps by water flow during washing. The drainage system is provided with a drainage outlet at the bottom of the outer barrel, a drainage pipe connected with the drainage outlet, and a drainage pump arranged on the drainage pipe, wherein washing water with thread scraps and sundries can be wound around a water pump machine member after entering the water pump, and if harder foreign matters such as paper clips, hair clips or coins exist in the washing water, the water pump is easy to malfunction.

At present, the impeller washing machine with a drainage pump discharges water in the washing machine under the action of the drainage pump, but no effective filtering device exists, a large amount of foreign matters enter the drainage pump after the washing machine is used for a long time, and the foreign matters entering the pump cannot be taken out. When the foreign matters are serious, the drainage device can not discharge the waste water, so that inconvenience and even economic loss are caused to users.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may contain prior art that does not constitute known technology to those of ordinary skill in the art.

Disclosure of Invention

The invention provides a drainage filtering system of a washing machine, aiming at the problems in the prior art, and the drainage filtering system is provided with two stages of filtering and is respectively used for filtering hard and soft foreign matters, so that the foreign matters can be effectively prevented from entering a drainage pump of the washing machine, and the drainage valve is prevented from being damaged by the foreign matters.

In order to realize the purpose of the invention, the invention is realized by adopting the following technical scheme:

a washing machine drain filtration system comprising:

a water outlet arranged at the bottom of the outer tub of the washing machine;

a drain pipe connected to the drain port;

a drain pump connected to the drain pipe, the drain pump having a pump chamber and an impeller located in the pump chamber;

a primary filtering device which is arranged at the water outlet and is used for filtering hard foreign matters;

and the secondary filtering device is arranged between the water outlet and the pump cavity and is used for filtering flexible foreign matters.

Furthermore, the primary filtering device is provided with an upper end cover and a lower end cover which are arranged in a buckling way, and a labyrinth-shaped water channel capable of filtering hard foreign matters is formed between the upper end cover and the lower end cover.

Furthermore, the end cover is provided with an upper end plate and a plurality of coaxially arranged lower edges extending downwards along the upper end plate.

Furthermore, a direct current notch which can realize that water flow does not flow through the labyrinth-shaped water channel is arranged on the lower edge.

Furthermore, the direct current gaps on the lower edge are positioned in the same radial direction.

Further, the width of the direct current notches on the plurality of lower edge edges is the same.

Further, the direct current notch is adjacent to the upper end plate.

Furthermore, the ratio of the width of the direct current notch to the radius of the lower edge is 0.06-0.3.

Furthermore, the ratio of the width of the direct current notch to the radius of the lower edge is 0.1-0.3.

Furthermore, a first water permeable hole which is communicated up and down is formed in the upper end plate.

Furthermore, the lower end cover is provided with a plurality of upper edges which are alternately arranged with the lower edges, and a lower end pipe which is arranged along the innermost upper edge and extends downwards, and the lower end of the lower sleeve is positioned in the drainage port.

Furthermore, the lower ends of the two adjacent upper edges are provided with connecting plates, the two upper edges and the connecting plates surround to form a settling tank, and the lower end of the lower edge is positioned in the settling tank.

Furthermore, a second water permeable hole which is communicated up and down is arranged on the connecting plate.

Furthermore, an accommodating groove is formed in the bottom of the outer barrel, the water outlet is formed in the bottom of the accommodating groove, and the primary filtering device is located in the accommodating groove.

Furthermore, the secondary filtering device is provided with a filtering cavity and a detachable filtering core arranged in the filtering cavity, and the filtering core is provided with a core frame, a vortex street generator arranged on the core frame and a plurality of baffle columns arranged at intervals and used for filtering flexible foreign matters.

Furthermore, the filter chamber is adjacent to the pump chamber, a communication opening is formed between the filter chamber and the pump chamber, and water flow in the filter chamber flows through the communication opening and then enters the pump chamber.

Further, the communication port is coaxial with the impeller.

Further, the drainage pump and the secondary filtering device are of an integral structure.

Furthermore, the filtering cavity is provided with a filtering water inlet, and the axial section of the filtering water inlet is larger than that of the communication port.

Furthermore, the core frame is provided with a front frame and a rear frame which are oppositely arranged, the rear frame is provided with a vortex street generator which extends towards the front frame, the front frame is provided with a plurality of retaining columns which extend towards the rear frame, and the retaining columns are arranged into an arc shape.

Furthermore, the vortex street generator is positioned in the middle of the rear frame, the rear frame is in a circular plate shape, and the retaining column is positioned at the edge of the rear frame.

Furthermore, a plurality of the bumping posts are arranged into a semi-circular arc shape, and the bumping posts are positioned on one side of the filtering cavity far away from the filtering water inlet.

Further, the extending size of the vortex street generator is 1/3 of the distance between the front frame and the rear frame, and the extending length of the baffle column is 2/3 of the distance between the front frame and the rear frame.

Based on the drainage filtering system of the washing machine, the invention also provides the washing machine with the drainage filtering system, and the washing machine is provided with two stages of filtering, so that hard and soft foreign matters are respectively filtered, the foreign matters can be effectively prevented from entering a drainage pump of the washing machine, and the drainage valve is prevented from being damaged by the foreign matters.

A washing machine comprises the drainage filtering system.

Compared with the prior art, the invention has the advantages and positive effects that: the primary filtering device is used for filtering hard foreign matters, such as coins, clips and the like, and filtering the hard foreign matters at the water drainage port, so that the hard foreign matters are prevented from entering the water drainage pipe; a secondary filtering device is arranged on a water path between the water outlet and the pump cavity and is used for filtering flexible foreign matters, such as thread scraps, hairs and the like, so that the hard and flexible foreign matters are removed from the washing water entering the pump cavity; set up the filtration that the two-stage filtration classification carried out the foreign matter, effectively filter the foreign matter, can prevent effectively that the foreign matter from getting into in the washing machine drain pump to avoid the foreign matter to damage the drain pump.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of a drainage filtering system of a washing machine according to the present invention;

FIG. 2 is an enlarged schematic view of the drain port of FIG. 1;

FIG. 3 is a schematic view of the arrangement of the primary filter apparatus of FIG. 2;

FIG. 4 is a schematic view of the structure on the end cap of FIG. 3;

FIG. 5 is a schematic view of the structure of FIG. 4 from another angle;

FIG. 6 is a schematic view of the structure of FIG. 3 under the end cap;

FIG. 7 is a schematic view of the structure of FIG. 6 from another angle;

FIG. 8 is a schematic structural view of the tub of FIG. 1;

FIG. 9 is a schematic diagram of the configuration of the drain pump and the secondary filter apparatus of FIG. 1;

FIG. 10 is a cross-sectional view of the drain pump of FIG. 9 taken along the axial direction;

FIG. 11 is a schematic view of the filter element of FIG. 9;

fig. 12 is a schematic view of another angle in fig. 11.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the positional relationships shown in the drawings, and in a normal use state, a direction approaching a user is "front", and conversely "rear". The terminology is for the purpose of describing the invention only and is for the purpose of simplifying the description, and is not intended to indicate or imply that the device or element so referred to must be in a particular orientation, constructed and operated, and is not to be considered limiting of the invention. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 12, an embodiment of a drain filtering system for a washing machine according to the present invention includes: the washing machine comprises a water outlet 10, a water drain pipe 20, a water drain pump 30, a primary filtering device 40 and a secondary filtering device 50, wherein the water outlet 10 is arranged at the bottom of an outer barrel 100 of the washing machine, and the water drain pipe 20 is connected with the water outlet 10 and is used for draining washing water in the outer barrel 100; the drain pump 30 is connected to the drain pipe 20, the drain pump 30 having a pump chamber 31 and an impeller 32 located in the pump chamber 31; the primary filtering device 40 is arranged at the water outlet 10, and the primary filtering device 40 is used for filtering hard foreign matters; the secondary filtering means 50 is provided between the drain opening 10 and the pump chamber 31, that is, on a water path between the drain opening 10 and the pump chamber 31, and the secondary filtering means 50 serves to filter flexible foreign substances. The primary filtering device 40 is used for filtering hard foreign matters, and hard foreign matters such as coins, paper clips and the like are filtered at the water drainage port, so that the hard foreign matters are prevented from entering the water drainage pipe; a secondary filtering device 50 is provided in a water path between the drain opening 10 and the pump chamber 31 for filtering flexible foreign substances such as lint and hair, so that the hard and flexible foreign substances are removed from the washing water introduced into the pump chamber. Set up the filtration that the two-stage filtration classification carried out the foreign matter, have corresponding effective filtration foreign matter, can prevent effectively that the foreign matter from getting into the washing machine drain pump in to avoid the foreign matter to damage the drain pump.

Referring to fig. 8, a receiving groove 101 is formed at the bottom of the outer barrel 100, a water outlet 10 is formed at the bottom of the receiving groove 101, and the primary filtering device 40 is located in the receiving groove 101; by providing the receiving groove 101, it is advantageous for receiving the primary filter device 40.

In this embodiment, referring to fig. 2 to 7, the primary filtering device 40 has an upper end cover 41 and a lower end cover 42 that are fastened to each other, and a labyrinth-shaped water channel 43 capable of filtering hard foreign matters is formed between the upper end cover 41 and the lower end cover 42, that is, an S-shaped water channel in the up-down direction is formed, so that hard foreign matters such as coins and clips are filtered, and the labyrinth-shaped water channel 43 has smaller up-down sizes, so that larger hard foreign matters are blocked and cannot enter the labyrinth-shaped water channel 43; for smaller hard foreign matters, the smaller hard foreign matters are precipitated in the process of flowing up and down in an S shape along with water flow. The flexible foreign matter can flow through the labyrinth water passage 43 with the water flow.

The end cover upper 41 has an upper end plate 411 and a plurality of coaxially arranged annular lower rims 412 extending downward along the upper end plate 411; the lower cap 42 has a plurality of upper rims 421 alternately arranged with the lower rims 412, and a lower tube 422 extending downward along the innermost upper rim 421, and the lower end of the lower tube 422 is positioned in the drain opening 10. The upper end cover 41 is buckled above the lower end cover 42, the lower edge 412 and the upper edge 421 are alternately arranged in the radial outward direction, the lower end surface of the lower edge 412 is lower than the upper end surface of the upper edge 421, and water flows inwards from the radial direction; flows downwards into the containing groove 101 from a gap between the edge of the end cover upper 41 and the containing groove 101, flows downwards below the outermost lower edge 412, and flows upwards above the outer upper edge 421 between the outermost lower edge 412 and the outermost upper edge 421; then flows downwardly over the lower rim 412 along the space between the outermost upper rim 421 and the inwardly adjacent lower rim 412, the water flows in turn inwardly and finally downwardly through the drain opening 10 along the lower end pipe 422. The hard foreign matter is filtered during the process of passing through the primary filtering means 40. +

The connecting plates 423 are arranged at the lower ends of the two adjacent upper edges 421, the two adjacent upper edges 421 and the connecting plates 423 connected with the two upper edges 421 surround to form a settling tank 424, when water flows through the labyrinth-shaped water channel 43 in the up-and-down direction, the speed of the water flow is slowed down, so that hard foreign matters with high density carried in the water flow can be settled in the settling tank 424, and the lower end of the lower edge 412 extends into the settling tank 423 to form the labyrinth-shaped water channel 43.

The lower edge 412 is provided with a direct current notch 4121 which can prevent water flow from flowing through the labyrinth-shaped water channel 43, thereby being beneficial to improving the flow speed and efficiency of the water flow and avoiding water collection at the labyrinth-shaped water channel 43. Preferably, all the lower edges 412 are provided with the dc notches 4121, and the plurality of dc notches 4121 form a dc channel. When the water flows through the primary filtering device 40, most of the water flows through the labyrinth-shaped water channel 43 to block or precipitate the hard foreign matters, so as to filter the hard foreign matters; a small amount of water flows through the straight water channel, which is beneficial to improving the water flow speed and passing through the first-stage filtering device 40 as soon as possible.

Preferably, the plurality of direct current notches 4121 on the lower edge 412 are located in the same radial direction, so that the water flows from outside to inside in the radial direction, the length of the direct current channel is shortest, and the drainage efficiency is further improved. The width of the direct current notch 4121 is small, most water flows inwards from the circumferential direction through the labyrinth-shaped water channel 43, and only a small part of water flows from the direct current notch 4121; the width of the direct current notch 4121 is small, so that hard foreign matters such as coins and clips can be stopped outside the direct current notch 4121, and the hard foreign matters with the size larger than the width of the direct current notch 4121 in the water flow passing through the direct current notch 4121 are filtered. The ratio of the width of the direct current notch 4121 to the radius of the lower edge 412 is 0.06-0.3; preferably, the ratio of the width of the DC notch 4121 to the radius of the lower rim 412 is 0.1-0.3.

Preferably, the plurality of dc notches 4121 on the lower edge 412 have the same width, so that each dc notch 4121 can pass the same amount of water, which is beneficial to the stability of the water flow in the dc flow channel. The dc notch 4121 is adjacent to the upper end plate 411, i.e., the dc notch 4121 is formed to be large upward.

A plurality of first water permeable holes 4111 which are vertically communicated are formed in the upper end plate 411, so that a part of water directly flows into the labyrinth-shaped water channel 43 or the water outlet 10 through the first water permeable holes 4111, and another path of the primary filtering device 40 through which water in the outer tub 100 passes is increased; the first water permeable hole 4111 is provided for allowing residual water in the outer tub 100 to flow out. The first filtering device 40 through which water flows in the outer tub 100: a portion of the water flows through the labyrinth-shaped water passage 43, flowing radially inward; a part of water flows through the straight water channel and flows inwards from the radial direction; a portion of the water flows directly downward through the first water permeable holes 4111.

It is preferable that the diameter of the first water permeable hole 4111 is equal to or less than the width of the direct current notch 4121, so that the hard foreign matters larger than the diameter of the first water permeable hole 4111 in the water flowing downward from the first water permeable hole 4111 are filtered, and the water flowing through the first water permeable hole 4111 can also reach the function of filtering the hard foreign matters. This ensures that all of the water flowing through the primary filter means 40 is filtered of hard foreign matter.

The connecting plate 423 is provided with a second water permeable hole 4231 communicating vertically and mainly used for discharging water remaining in the settling tank 424. The diameter of the second water permeable holes 4231 is smaller than or equal to the diameter of the first water permeable holes 4111.

Referring to fig. 9-12, the secondary filtering device 50 has a filtering chamber 51, a removable filtering core 52 disposed in the filtering chamber 51, the filtering core 52 having a core holder 521, a vortex shedding generator 522 disposed on the core holder 521, and a plurality of barrier columns 523 disposed at intervals for filtering flexible foreign matters. Set up vortex street generator 522, according to karman vortex street principle, the rivers of vortex street generator 522 of flowing through produce the swirl for flexible foreign matter in the rivers rotates along with the rivers, and rotatory rivers flow through bumping post 523, make flexible foreign matter twine on bumping post 523, realize the filtration to flexible foreign matter such as thread scraps, hair. The vortex street generator 522 is arranged, so that the filtering capacity of flexible foreign matters is improved; preferably, the barrier ribs 523 are disposed in a range where the water current generates a vortex by the vortex street generator 522, that is, the water current rotates at the plurality of barrier ribs 523, so that the flexible foreign matter is entangled on the barrier ribs 523.

The core frame 521 has a front frame 5211 and a rear frame 5212 which are oppositely arranged, a vortex street generator 522 which extends in the direction of the front frame 5211 is arranged on the rear frame 5212, a plurality of retaining columns 523 which extend towards the rear frame 5212 are arranged on the front frame 5211, and the plurality of retaining columns 523 are arranged in an arc shape. The front frame 5211 and the rear frame 5212 are both circular, the vortex street generator 522 is positioned in the middle of the rear frame 5212, the rear frame 5212 is disk-shaped, and the barrier rib 523 is positioned at the edge of the rear frame 5212.

In this embodiment, the drainage pump 30 and the secondary filtering device 50 are integrated, the filter chamber 51 is disposed adjacent to the pump chamber 31, a communication opening 512 is disposed between the filter chamber 51 and the pump chamber 31, and water in the filter chamber 51 flows through the communication opening 512 and then enters the pump chamber 31. The communication port 512 is a water outlet of the filter chamber 51 and is also a water inlet of the pump chamber 31. By providing the drain pump 30 and the secondary filtering device 50 as an integral structure, it is advantageous to simplify the structure, avoid providing a connection pipe between the drain pump 30 and the secondary filtering device 50, and to improve the installation speed.

In other embodiments, the drainage pump 30 and the secondary filtering device 50 may be separate structures.

The filter chamber 51 has a filter inlet 511, the filter inlet 511 is located at the middle of the filter element 521 in the front-rear direction, and the barrier 523 is located at a side of the filter chamber 51 far from the filter inlet 511. The water flows into the filter chamber 51 from the filter inlet 511, passes through the vortex street generator 522, and then reaches the barrier 523.

The axial section of the filtering water inlet 511 is larger than that of the communication port 512, that is, the diameter of the filtering water inlet 511 is larger than that of the communication port 512, which is beneficial to the rotation and filtering of the water flow in the filtering cavity 51. The communication port 512 is provided coaxially with the impeller 32. The communication port 512 is provided on the rear side of the rear frame 5212, or the communication port 512 is provided on the rear side of the filter element 52.

The vortex street generating body 522 has an extension of 1/3 of the distance between the front frame 5211 and the rear frame 5212, and the barrier ribs 523 have an extension of 2/3 of the distance between the front frame 5211 and the rear frame 5212.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. A washing machine drain filtration system, comprising:

a water outlet arranged at the bottom of the outer tub of the washing machine;

a drain pipe connected to the drain port;

a drain pump connected to the drain pipe, having a pump chamber and an impeller located in the pump chamber;

2. The drain filter system according to claim 1, wherein the primary filter device has an upper end cap and a lower end cap that are engaged with each other, and a labyrinth-shaped water passage for filtering hard foreign materials is formed between the upper end cap and the lower end cap.

3. The drain filter system of claim 2, wherein the end cap has an upper end plate and a plurality of coaxially disposed lower rims extending downwardly along the upper end plate.

4. The drainage filtration system of claim 3 wherein said lower rim has a cut-out for preventing water flow through said labyrinth-shaped channel.

5. The drain filter system of claim 3, wherein the bottom end cap has a plurality of upper beads alternating with the lower beads, and a bottom end tube extending downwardly along the innermost upper bead, the bottom end of the bottom tube being positioned within the drain opening.

6. The drain filtering system according to any one of claims 1 to 5, wherein the secondary filtering device has a filtering chamber, a detachable filter element disposed in the filtering chamber, the filter element having a core frame, a vortex street generator disposed on the core frame, and a plurality of barrier pillars disposed at intervals for filtering flexible foreign matters.

7. The drainage filter system of claim 6, wherein the filter chamber is disposed adjacent to the pump chamber, a communication opening is disposed between the filter chamber and the pump chamber, and water in the filter chamber flows through the communication opening and enters the pump chamber.

8. The drain filter system according to claim 6, wherein the cartridge holder has a front holder and a rear holder which are opposed to each other, a vortex shedding generator extending in a direction of the front holder is provided on the rear holder, a plurality of retaining pillars extending in a direction of the rear holder are provided on the front holder, and the plurality of retaining pillars are arranged in an arc shape.

9. The drainage filtration system of claim 8, wherein the vortex street generator extends 1/3 of the distance between the front and rear frames and the barrier post extends 2/3 of the distance between the front and rear frames.

10. A washing machine characterized by comprising the drain filtering system of any one of claims 1 to 9.