CN114521847A

CN114521847A - Automatically cleaning sewage case and floor cleaning machine

Info

Publication number: CN114521847A
Application number: CN202210238120.XA
Authority: CN
Inventors: 郭建刚
Original assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Current assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-05-24

Abstract

The embodiment of the invention provides a self-cleaning sewage tank and a floor washing machine, wherein the self-cleaning sewage tank comprises: the upward end of the box body is open; the water spraying diffuser is arranged at the open end of the box body, the peripheral side of the water spraying diffuser is matched with the inner wall of the open end of the box body and is provided with a nozzle corresponding to the inner wall of the box body, and the nozzle is used for spraying cleaning water to the inner wall of the box body; the water spray diffuser is internally provided with a water containing cavity, the nozzle is communicated with the water containing cavity, and the water containing cavity is used for supplying water to the nozzle; and one end of the adapter assembly can be connected with an external water source, and the other end of the adapter assembly can be connected with the water containing cavity, so that the external water source can supply water for the water containing cavity through the adapter assembly. According to the self-cleaning sewage tank provided by the embodiment of the invention, the water spray diffuser is arranged, so that cleaning water can be directly sprayed to the inner wall of the tank body, the cleaning of the sewage tank is realized, and the problem that the sewage tank is difficult to clean manually in the prior art is solved.

Description

Automatically cleaning sewage case and floor cleaning machine

Technical Field

The invention belongs to the technical field of small household appliances, and particularly relates to a self-cleaning sewage tank and a floor cleaning machine.

Background

The sewage case of floor cleaning machine in the existing market can not automatically clean, needs to be cleaned with the brush by hands, is difficult to clean, and is unpleasant in smell and objectionable in cleaning the sewage case because the sewage case is dirty. For example, chinese patent No. CN 215838794U discloses a self-cleaning floor washing machine, which is installed in a fluid storage device of a cleaning device and includes a main machine and a base; the host computer includes the support, and the support top is equipped with the fan, and the support bottom is equipped with the group battery, and the fan is connected with the group battery electricity, and the support both sides are equipped with clean water tank and sewage case respectively, and the support below articulates there is the scrubbing brush, and the scrubbing brush includes the even water subassembly of round brush, moist round brush and washs the scrubbing subassembly of round brush, even water subassembly and clean water tank intercommunication, scrubbing subassembly and sewage case intercommunication. This sewage case of floor cleaning machine does not have self-cleaning function, and the sewage case needs the people to go the clearance after using a period, brings not good use experience for the user.

Disclosure of Invention

In view of the above problems of the prior art, an object of an embodiment of the present invention is to provide a wastewater tank having a self-cleaning function, which makes cleaning simple and the wastewater tank clean and sanitary.

The embodiment of the invention adopts the technical scheme that the self-cleaning sewage tank comprises:

the upward end of the box body is open;

the side of the water spray diffuser is matched with the inner wall of the open end of the box body and is provided with a nozzle corresponding to the inner wall of the box body, and the nozzle is used for spraying cleaning water to the inner wall of the box body; the spray water diffuser is internally provided with a water containing cavity, the nozzle is communicated with the water containing cavity, and the water containing cavity is used for supplying water to the nozzle;

and one end of the adapter assembly can be connected with an external water source, and the other end of the adapter assembly can be connected with the water containing cavity, so that the external water source can supply water for the water containing cavity through the adapter assembly.

According to the self-cleaning sewage tank disclosed by the embodiment of the invention, the water spray diffuser is arranged, so that cleaning water can be directly sprayed to the inner wall of the tank body to clean the inner wall of the tank body, the self-cleaning of the sewage tank is realized, and the problem that the sewage tank is difficult to clean manually in the prior art is solved.

In some embodiments, the water spray diffuser is provided with an annular cavity from the top surface periphery to the inside, and the annular cavity forms the water containing cavity; the automatically cleaning sewage tank still includes filter screen support, filter screen support locates the top of water spray diffuser to the shutoff the upper end of annular chamber, the last perforating hole that is equipped with of filter screen support, adapter subassembly wears to establish the perforating hole, in order to be used for to hold the intracavity water supply. The filter screen support is matched with the water spray diffuser to form a sealed water containing cavity, so that the structure can be simplified, and the processing and manufacturing difficulty can be reduced.

In some embodiments, the bottom of the water containing cavity is provided with a plurality of water outlet holes, and the plurality of nozzles are in one-to-one correspondence and communication with the water outlet holes and used for enabling water in the water containing cavity to enter the nozzles through the water outlet holes. The inner wall of the whole box body can be cleaned, and the cleaning efficiency is improved.

In some embodiments, a plurality of the nozzles are arranged in a circle around a lower portion of the water spray diffuser, and water spray ends of the nozzles are arranged obliquely downward; the section of the nozzle is gradually increased from one end close to the water outlet hole to the water spraying end. Can be favorable for the blowout of water to promote water pressure, improve clean effect.

In some embodiments, the spout includes a top surface and a bottom surface; the lower portion peripheral side of the water spray diffuser is provided with a first annular boss and a second annular boss which are spaced from each other, the first annular boss is located above the second annular boss and protrudes outwards from the second annular boss, the peripheral side of the first annular boss is attached to the inner wall of the box body, and the lower surface of the first annular boss forms the top surfaces of all the nozzles; the upper surface of the second annular boss forms the bottom surfaces of all the nozzles. Through setting up annular boss top surface and the bottom surface in order to form a plurality of spouts respectively simultaneously, reduce the manufacturing degree of difficulty, promote machining efficiency.

In some embodiments, the lower surface of the first annular boss is a horizontal plane; the upper surface of the second annular boss is a downward inclined plane. So, can make the spout be the downward sloping form to make the cross-section of spouting the water end be greater than the cross-section of the one end that is close to the apopore of spout, be convenient for spray water, improve clean efficiency and clean effect.

In some embodiments, the spout further comprises a left side and a right side, the left side and the right side gradually distant from the water outlet hole to the water spraying end to form inclined surfaces respectively; and one sides of the left side surface and the right side surface of the adjacent two spouts, which are positioned at the water spraying end, are connected. The left side surface and the right side surface are set to be inclined planes, so that the sectional area of the water spraying end can be further enlarged, and the water yield is improved.

In some embodiments, the self-cleaning waste water tank further comprises a solid particle collection box integral with the water spray diffuser, the solid particle collection box having a waste water inlet provided at a side thereof; the water spray diffuser is positioned at the top of the solid particle collecting box, and a through hole which is communicated with the solid particle collecting box is formed in the area of the water spray diffuser, which is surrounded by the annular cavity. The water spray diffuser is combined with the solid particle collecting box, so that the whole structure is reasonable and compact, and the use performance of the product can be improved.

In some embodiments, the filter screen bracket comprises a bottom part and a side part which is arranged on the top surface of the bottom part and is annular, the top surface of the bottom part is also provided with an opening which is positioned on the outer side of the side part, a vertically extending tubular part is connected to the opening, and the through hole is formed in the tubular part. The filter screen support is reasonable in structure and convenient for the adapter assembly to pass through.

The embodiment of the invention also provides a floor washing machine, which comprises a host machine, a mop component connected to the bottom of the host machine, a clean water tank component arranged on the host machine and a handle connected to the upper part of the host machine; the floor washing machine further comprises a sewage tank assembly, the sewage tank assembly comprises the self-cleaning sewage tank in any one of the embodiments, and the self-cleaning sewage tank and the clean water tank are arranged on the host in parallel. This sewage case of floor cleaning machine is automatically cleaning sewage case, no longer need open the sewage case and remove the clearance by a brush, and fine solution is because the sewage case is dirty, and the problem that the clearance sewage case can be objectionable.

Compared with the prior art, the self-cleaning sewage tank and the floor washing machine have the advantages that the self-cleaning sewage tank and the floor washing machine can be connected to the water faucet through the external hanging assembly, self-cleaning of the sewage tank is achieved, a brush does not need to be used for manual cleaning, and cleaning becomes simple, clean and sanitary.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

The summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments, by way of example and not by way of limitation, and together with the description and claims, serve to explain the inventive embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

Fig. 1 is a schematic perspective view of a self-cleaning waste water tank according to an embodiment of the present invention.

Fig. 2 is an exploded view of a self-cleaning wastewater tank according to an embodiment of the present invention.

Fig. 3 is a sectional view of a self-cleaning foul water tank according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a screen support according to an embodiment of the present invention in combination with a water jet diffuser.

FIG. 5 is a top view of a water jet diffuser in accordance with an embodiment of the present invention.

FIG. 6 is a perspective view of a water jet diffuser in accordance with an embodiment of the present invention.

FIG. 7 is a partial cross-sectional view of a water jet diffuser in accordance with an embodiment of the present invention.

Fig. 8 is an enlarged view of a portion a in fig. 7.

Fig. 9 is a schematic perspective view of a floor washing machine according to an embodiment of the present invention.

Reference numerals:

1-a box body; 11-open end; 12-a sewage draining outlet; 13-sealing the screw cap; 14-upper cover of the box body; 15-columnar pores;

2-water spray diffuser; 21-nozzle; 211-top surface; 212-bottom surface; 213-left side; 214-right side; 22-water containing cavity; 23-water outlet; 24-an annular projection; 25-ring seal; 26-a first annular boss; 27-a second annular boss; 28-a through hole;

3-an adapter assembly; 31-water pipe connection; 32-a hose; 33-a transfer elbow; 34-elbow sealing ring;

4-a filter screen bracket; 41-through holes; 42-bottom; 43-side part;

5-a solid particle collection box; 51-a sewage inlet;

6-a host; 7-a mop assembly; 8-a handle; 9-a sewage tank assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.

As shown in fig. 1 to 3, an embodiment of the present invention provides a self-cleaning wastewater tank, which is applied to a floor washing machine. The self-cleaning sump tank comprises a tank body 1, a water spray diffuser 2 and an adaptor assembly 3. The upward end of the box body 1 is open to form an open end 11. The water spray diffuser 2 is installed at the open end 11 of the box body 1, the peripheral side of the water spray diffuser 2 is matched with the inner wall of the open end 11 of the box body 1, and the water spray diffuser is provided with a nozzle 21 corresponding to the inner wall of the box body 1, and the nozzle 21 is used for spraying cleaning water to the inner wall of the box body 1. The water spray diffuser 2 is provided with a water containing cavity 22 therein, the nozzle 21 is communicated with the water containing cavity 22, and the water containing cavity 22 is used for supplying water to the nozzle 21. Adapter assembly 3's one end can be connected with outside water source, and the other end can be connected with holding water cavity 22 to make outside water source can supply water for holding water cavity 22 through adapter assembly 3.

According to the self-cleaning sewage tank disclosed by the embodiment of the invention, the water spray diffuser 2 is arranged in the upper end of the tank body 1, so that cleaning water can be directly sprayed to the inner wall of the tank body 1 to clean the whole inner wall of the tank body 1, the self-cleaning of the sewage tank is realized, the problem that the sewage tank is difficult to clean is solved, and the cleaning of the sewage tank is simple.

In some embodiments, as shown in fig. 4 and 5, the water jet diffuser 2 is provided with an annular cavity inwardly from the periphery of its top surface 211, the annular cavity forming the water receiving cavity 22. That is, the water containing chamber 22 is annular and open at its upward end. The self-cleaning sewage tank also comprises a filter screen support 4, the filter screen support 4 is arranged at the top of the water spray diffuser 2 and blocks the upper end of the annular cavity, and the filter screen support 4 is provided with a through hole 41 communicated with the water containing cavity 22. The adapter assembly 3 is provided with a through hole 41 for supplying water into the water containing cavity 22. The filter screen bracket 4 is matched with the water spray diffuser 2 to form the sealed water containing cavity 22, so that the structure can be simplified, and the processing and manufacturing difficulty can be reduced.

In order to improve the stability and sealing of the connection between the screen holder 4 and the water jet diffuser 2, an annular protrusion 24 is provided on the top surface 211 of the water jet diffuser 2, and the annular protrusion 24 is located inside the water receiving chamber 22. The bottom surface 212 of the filter screen bracket 4 is provided with an annular groove corresponding to the annular convex part 24, the bottom of the annular groove is provided with an annular sealing ring 25, and the annular convex part 24 is embedded into the annular groove and presses against the annular sealing ring 25. Through the concave-convex matching and the arrangement of the annular sealing ring 25, the tightness of the combination of the filter screen bracket 4 and the water spray diffuser 2 is effectively ensured.

With continuing reference to fig. 4 and 5, the bottom (cavity bottom) of the water containing cavity 22 (annular cavity) is provided with a plurality of water outlet holes 23, and the plurality of water outlet holes 23 are also annularly distributed around the cavity bottom. Spout 21 also is a plurality of, and a plurality of spouts 21 set up the round around the periphery of water spray diffuser 2, and spout 21 and 23 one-to-one of apopore and intercommunication, so, hold the water in the water cavity 22 and get into spout 21 blowout through apopore 23, realize corresponding the cleanness of the inner wall of whole box 1.

In some embodiments, as shown in fig. 3, 4 and 6, a plurality of nozzles 21 are sequentially arranged around the lower portion of the water jet diffuser 2. The water in the water containing cavity 22 enters the nozzle 21 and is sprayed out from the free end of the nozzle 21, which can be defined as the water spraying end of the nozzle 21, and the water spraying end of the nozzle 21 is arranged in an oblique downward direction. The water spraying end is obliquely arranged downwards, so that water can be smoothly sprayed out of the nozzle 21 and sprayed onto the inner wall of the box body 1, and meanwhile, the water pressure can be improved, and the cleaning effect is improved. The arrows in fig. 4 indicate the direction of water ejection. The section of the nozzle 21 is gradually increased from the end close to the water outlet hole 23 to the water spraying end. So, can promote the water yield, further increase clean dynamics, realize thoroughly clean sewage case's purpose. The cross section of the spout 21 means a cross section perpendicular to the water ejection direction.

As shown in fig. 4 and 8, the water outlet 23 may be a vertically disposed hole, so that water in the water containing cavity 22 smoothly and rapidly flows into the nozzle 21.

In some embodiments, as shown in fig. 7 and 8, the spout 21 includes a top surface 211 and a bottom surface 212. The lower periphery of the water spray diffuser 2 is provided with a first annular boss 26 and a second annular boss 27 which are spaced from each other, the first annular boss 26 is located above the second annular boss 27, and the first annular boss 26 protrudes outwards from the second annular boss 27. The peripheral side of the first annular boss 26 is attached to the inner wall of the box body 1, and the lower surface of the first annular boss 26 forms the top surfaces 211 of all the nozzles 21; the upper surface of the second annular ledge 27 forms the bottom surface 212 of all of the jets 21. Through setting up annular boss with top surface 211 and the bottom surface 212 that respectively forms a plurality of spouts 21 simultaneously, reduce the manufacturing degree of difficulty, promote machining efficiency, guarantee the uniformity of a plurality of spouts 21 structures, make box 1 inner wall everywhere clean effect the same.

Further, with continued reference to fig. 8, the lower surface of the first annular ledge 26 is horizontal. The upper surface of the second annular boss 27 is a downwardly inclined slope. In this way, the nozzle 21 can be inclined downward, and the cross section of the water spraying end is larger than that of the end of the nozzle 21 close to the water outlet hole 23. That is, the spout 21 has a tapered flare structure.

In some embodiments, as shown in fig. 8, the spout 21 further includes a left side 213 and a right side 214. The left side surface 213 and the right side surface 214 are gradually separated from the water outlet hole 23 to the water spraying end to form inclined surfaces. The left side surface 213 and the right side surface 214 are inclined surfaces, so that the sectional area of the water spraying end can be further enlarged, and the water yield is improved. The bottom surface 212 of the spout 21 is designed to be a slope inclined downwards, and both sides are respectively set to be slopes expanded outwards at the same time, so that water sprayed out of the spout 21 is sprayed onto the bottom surface 212, then the water is diffused along the slopes on both sides, and the diffused water is sprayed onto the inner wall of the box body 1, thereby realizing the purpose of cleaning the sewage tank. The left side surface 213 and the right side surface 214 of two adjacent nozzles 21 are connected at one side of the water spraying end. Therefore, the circumferential surface of the water spray diffuser can be effectively utilized to form the spray nozzle, the spray cleaning area is increased, and the cleaning effect is improved.

With continued reference to fig. 8, the structure of the spout 21 can also be understood in the following manner: a plurality of non-cubic tetrahedrons are disposed in the annular gap formed between the first annular boss 26 and the second annular boss 27, with the nozzle 21 formed between adjacent tetrahedrons. One face of the tetrahedron is attached to the lower surface of the first annular boss 26, and the other face of the tetrahedron is attached to the upper surface of the second annular boss 27; the other side of the tetrahedron forms the side of one of the orifices 21 and the last side of the tetrahedron forms the side of another orifice 21 adjacent to one of the orifices 21.

In some embodiments, as shown in fig. 4, 6 and 7, the self-cleaning sump further comprises a solid particle collection box 5 integral with the water spray diffuser 2. That is, the water spray diffuser 2 is formed on the solid particle collecting box 5. The water spray diffuser 2 is located at the top of the solid particle collecting box 5 in order not to affect the original function of the solid particle collecting box 5 itself and to allow the water sprayed from the water spray diffuser 2 to clean the entire inner wall of the cabinet 1. When the solid particle collecting box 5 is placed in the box body 1, the water spray diffuser 2 is located right at the open end 11 of the box body 1 and is fitted to the open end 11. Namely, the structure of the solid particle collecting box 5 of the existing floor washing machine can be changed, and the water spray diffuser 2 is designed at the upper end of the solid particle collecting box 5, so that the solid particle collecting box 5 has the function of collecting solid particles and the function of water spray cleaning, and the service performance of products is improved.

With continued reference to fig. 6 and 7, the side 43 of the solids collection box 5 is provided with a sewage inlet 51. As shown in fig. 2 and 5, the water spray diffuser 2 is provided with a through hole 28 penetrating the inside of the solid particle collecting box 5 at a central region surrounded by the water containing chamber 22. When the floor cleaning machine works, suction power components such as a fan penetrate through a filter screen in the filter screen support 4 and the through holes 28 in the water spray diffuser 2 to suck in the solid particle collecting box 5, negative pressure is formed in the box, dirt on the surface to be cleaned enters the solid particle collecting box 5 through the sewage inlet 51 under the action of the negative pressure, liquid penetrates through the solid particle collecting box 5 to enter the box body 1, and solid particles are reserved in the solid particle collecting box 5 to realize solid-liquid classification.

In some embodiments, as shown in fig. 2, the filter screen bracket 4 includes a bottom portion 42 and a side portion 43 having a ring shape and disposed on a top surface 211 of the bottom portion 42, and an opening disposed on an outer side of the side portion 43 is further disposed on the top surface 211 of the bottom portion 42, and a vertically extending tubular portion is connected to the opening, and a through hole 41 is formed in the tubular portion. The bottom 42 of the filter support 4 is a solid structure at least corresponding to the upper open part of the water containing cavity 22 to seal the water containing cavity 22. The rest of the bottom 42 of the sieve support 4 should have at least holes allowing the passage of gas, which can communicate with the through holes 28 of the water jet diffuser 2, so that a suction power member such as a fan can suck the gas inside the solid particle collecting box 5 via the sieve support 4 and the water jet diffuser 2.

As shown in fig. 1 to 3, the self-cleaning waste water tank further includes a tank upper cover 14, and the tank upper cover 14 is sleeved on the outer side of the strainer holder 4. The upper cover 14 of the box body is provided with a columnar hole 15. When the upper cover 14 is sleeved on the outer side of the filter screen bracket 4, the tubular part is arranged in the columnar hole 15.

In some embodiments, as shown in fig. 1-3, the adapter assembly 3 includes a water connection 31, a hose 32, and an adapter bend 33. The water pipe connector 31 is used for connecting with a tap of an external water source, and one end of the adapter elbow 33 is inserted into the tubular part. An elbow sealing ring 34 is sleeved on one end of the adapter elbow 33 inserted into the tubular part for sealing the adapter elbow 33 and the tubular part to prevent water leakage. The hose 32 is connected at its two ends to the water pipe connector 31 and the adapter bend 33, respectively. When the sewage tank needs to be cleaned, the water faucet is opened, water enters the water containing cavity 22 through the adapter assembly 3 and is sprayed out of the inner wall of the tank body 1 through the nozzle 21, the sewage tank is cleaned, sewage formed after cleaning is collected to the bottom of the tank body 1, and the sewage is discharged to the outside through the sewage outlet 12 in the bottom of the tank body 1. The drain outlet 12 is provided with a sealing screw cap 13, which is convenient for sealing and opening the drain outlet 12. The direction of the arrows in fig. 3 indicates the direction of the water flow.

As shown in fig. 9, the embodiment of the present invention further provides a floor washing machine, which comprises a main machine 6, a mop assembly 7 connected to the bottom of the main machine 6, a clean water tank assembly arranged on the main machine 6, and a handle 8 connected to the upper part of the main machine 6. The scrubber also comprises a sewage tank assembly 9, the sewage tank assembly 9 comprises the self-cleaning sewage tank in any of the above embodiments, and the sewage tank assembly 9 and the clean water tank assembly are arranged on the main machine 6 in parallel.

According to the floor washing machine, the sewage tank can be self-cleaned, so that the problem that the sewage tank is dirty and the problem that the sewage tank is objectionable to clean is solved well.

It is understood that the water mentioned in the present invention may refer to clean water, and may also refer to cleaning water containing detergent. That is, water should be interpreted broadly in this application.

The above description is intended to be illustrative, and not restrictive, and variations, modifications, substitutions, and alterations may be made to the above-described embodiments by those of ordinary skill in the art within the scope of the present disclosure. Also, the above-described examples (or one or more versions thereof) may be used in combination with each other, and it is contemplated that the embodiments may be combined with each other in various combinations or permutations.

Claims

1. A self-cleaning sump tank, comprising:

the upward end of the box body is open;

2. The self-cleaning waste tank of claim 1, wherein the water jet diffuser is provided with an annular chamber inwardly from a top peripheral edge thereof, the annular chamber forming the water receiving chamber; the automatically cleaning sewage tank still includes filter screen support, filter screen support locates the top of water spray diffuser to the shutoff the upper end of annular chamber, the last perforating hole that is equipped with of filter screen support, adapter subassembly wears to establish the perforating hole, in order to be used for to hold the intracavity water supply.

3. The self-cleaning waste water tank as claimed in claim 2, wherein the bottom of the water containing chamber is provided with a plurality of water outlet holes, and the plurality of nozzles are in one-to-one correspondence with and communicated with the water outlet holes, so that the water in the water containing chamber enters the nozzles through the water outlet holes.

4. The self-cleaning waste water tank as claimed in claim 3, wherein the plurality of spouting holes are formed in a circle around a lower portion of the water spray diffuser, and water spray ends of the spouting holes are formed in an obliquely downward direction; the section of the nozzle is gradually increased from one end close to the water outlet hole to the water spraying end.

5. The self cleaning waste tank of claim 4, wherein the spout includes a top surface and a bottom surface; the lower portion peripheral side of the water spray diffuser is provided with a first annular boss and a second annular boss which are spaced from each other, the first annular boss is located above the second annular boss and protrudes outwards from the second annular boss, the peripheral side of the first annular boss is attached to the inner wall of the box body, and the lower surface of the first annular boss forms the top surfaces of all the nozzles; the upper surface of the second annular boss forms the bottom surfaces of all the nozzles.

6. The self-cleaning waste water tank of claim 5 wherein the lower surface of the first annular ledge is a horizontal surface; the upper surface of the second annular boss is an inclined plane which inclines downwards.

7. The self-cleaning waste water tank of claim 5, wherein the spout further comprises left and right sides gradually distant from the water outlet hole to the water spray end to form slopes, respectively; and one sides of the left side surface and the right side surface of the adjacent two spouts, which are positioned at the water spraying end, are connected.

8. The self cleaning waste tank of claim 2, further comprising a solid particle collection box integral with the water spray diffuser, the solid particle collection box having a waste inlet on a side thereof; the water spray diffuser is positioned at the top of the solid particle collecting box, and a through hole which is communicated with the solid particle collecting box is formed in the area of the water spray diffuser, which is surrounded by the annular cavity.

9. The self-cleaning waste tank of claim 2 wherein the strainer holder includes a bottom portion and an annular side portion disposed on a top surface of the bottom portion, the bottom portion further having an opening disposed on an outer side of the side portion, the opening having a vertically extending tubular portion attached thereto, the tubular portion defining the through hole.

10. A floor washing machine comprising a main machine, a mop assembly connected to the bottom of the main machine, a clean water tank assembly arranged on the main machine, and a handle connected to the upper part of the main machine, characterized in that the floor washing machine further comprises a sewage tank assembly comprising the self-cleaning sewage tank of any one of claims 1 to 9, the sewage tank assembly being arranged on the main machine in parallel with the clean water tank assembly.