Kitchen waste disposer with self-cleaning device

Abstract

The application discloses a kitchen garbage disposer with a self-cleaning device, wherein a cylinder base (7) is provided with four through holes, a first through hole is a feeding port (21) communicated with a garbage crushing device (3), a second through hole is a discharging port (22) communicated with a garbage collecting device (5), a third through hole is a connecting port (23) connected with a driving device (4), and a fourth through hole is a liquid outlet (24) for discharging waste water; a dehydration device (6) is provided with a filter screen (9) at one end of the liquid outlet (24) to prevent garbage from blocking the liquid outlet (24), the outer side of the filter screen (9) is provided with a self-cleaning device for cleaning garbage, and the self-cleaning device is connected to the cylinder base (7) at the liquid outlet (24). After the above structure is adopted, garbage is crushed, then dehydrated and filtered, and further has the self-cleaning function, so that the safety hidden danger is eliminated and the environment is ensured to be clean.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of environmental protection equipment, in particular to a kitchen garbage disposer with a self-cleaning device. BACKGROUND

[0002] The processing of kitchen garbage is a difficult link in the current garbage resource utilization, and it faces certain difficulties from collection to storage, transportation and processing, which causes many inconveniences to users in the process of life. The kitchen garbage disposer is a way to reduce such inconveniences. The existing kitchen garbage disposer mainly falls into three categories: (1) mechanical type, mainly adopting a crushing device and a filtering device to crush, filter and dry the kitchen garbage into dry and small powder, which is then poured by the user at regular intervals, and no residue is discharged into the drain pipe; (2) biological type, which is processed by the building drainage system (mainly by microbial decomposition) and then discharged into the public drainage system; and (3) single type, which is the most common type, and the garbage is ground by a motor-driven crushing device and then directly discharged into the sewer pipe. The single type garbage disposer is more suitable for every household, and its price is relatively low. However, the sewer pipe is originally designed to discharge domestic sewage, and the kitchen garbage is directly discharged into the sewer pipe after being crushed, which will bring great pressure to the pipe system and easily form accumulation or adhesion in the pipe, causing not only rotten smell and bacterial breeding, but also pipe blockage, bursting and even sometimes the generation of methane, thus leading to more hidden but serious environmental pollution and great municipal pressure, and even causing safety accidents. Therefore, the existing kitchen garbage disposer is prone to blockage, the dehydration effect is greatly reduced, and even the disposer fails, which has great safety hazards and affects the living environment and physical and mental health of people. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a kitchen garbage disposer with a self-cleaning device, which can dehydrate and filter water after garbage crushing and further has a self-cleaning function, so as to eliminate safety hazards and ensure environmental cleanliness.

[0004] To solve the above technical problem, the kitchen garbage disposer with a self-cleaning device provided by the present application comprises a garbage crushing device installed below a sink and connected with a water outlet of the sink, a separation cylinder, a dehydration device, a driving device connected with the dehydration device, and a garbage collection device. The dehydration device is located in the separation cylinder, and the separation cylinder is provided with an inlet connected with the garbage crushing device, a solid discharge outlet connected with the garbage collection device, a connecting port connected with the driving device, and a liquid discharge outlet for discharging waste water. The dehydration device is provided with a filter screen at one end of the liquid discharge outlet to prevent garbage from blocking the liquid discharge outlet. The separation cylinder is provided with a self-cleaning device for cleaning the filter screen.

[0005] Further improvement, the self-cleaning device is located outside the filter screen, and the self-cleaning device is connected to the separation cylinder at the liquid discharge outlet; the dewatering device comprises a screw rod rotatably connected in the separation cylinder; after such arrangement, the installation of the self-cleaning device is more convenient, the influence of the mixture in the filter screen on the self-cleaning device is less, the use stability of the self-cleaning device is better, and the service life is longer.

[0006] Further improvement, the filter screen is in a cylindrical shape, and a plurality of rows of filter holes are arranged on the circumferential wall in the circumferential direction, and the filter screen is sleeved on the tail of the screw rod in the dewatering device; with such structure, the filter screen is easy to assemble, and the cleaning device can drive the filter screen to rotate, so that the probability of the filter screen being blocked is smaller, thereby the use stability of the whole equipment is better.

[0007] Further improvement, the self-cleaning device comprises a cleaner and a rotating shaft, the cleaner is tightly connected with the rotating shaft, the two ends of the rotating shaft are rotatably connected to the separation cylinder, a plurality of rows of gear rings are arranged on the outer circumferential wall of the cleaner in the axial direction, the teeth on the gear rings are inserted into or separated from the filter holes on the filter screen; one end of the rotating shaft is connected with the driving device through a transmission mechanism; under the action of the gear ring, the teeth of the gear ring can extrude the particles in the filter holes on the filter screen back to the inside of the filter screen, which is convenient for being conveyed to the extrusion end by the screw rod for extrusion and dewatering, and the filter screen is not easy to be blocked, thereby the self-cleaning effect is achieved, the continuous use performance of the equipment is better, and the maintenance period is longer; and the structure is simple, easy to process and form, the preparation cost is low, the rotating shaft is disassembled during maintenance, the gear ring can be taken out, and the assembly and maintenance are convenient.

[0008] Further improvement, the self-cleaning device comprises a cleaner and a rotating shaft, the cleaner is tightly connected with the rotating shaft, the two ends of the rotating shaft are rotatably connected to the separation cylinder, the cleaner is a brush, and the free end of the brush is located in the filter hole; one end of the rotating shaft is connected with the driving device through a transmission mechanism; the brush has a low preparation cost and can be directly obtained from the market, so the purchase is convenient, and the brush has a cleaning effect on the whole outer circumferential surface of the filter screen when rotating, so that the outer circumferential surface of the filter screen is not easy to scale, thereby reducing the comprehensive energy consumption during long-term use.

[0009] Further improvement, the transmission mechanism comprises a gear, the gear is connected to one end of the rotating shaft and is circumferentially limited, the tail of the screw rod is provided with a plurality of concave tooth grooves arranged in the circumferential direction, and the gear is engaged with the tooth grooves for transmission; in this way, the transmission and driving mechanisms do not need to be additionally arranged, the space and parts can be saved, thereby the volume is reduced and the production cost is reduced.

[0010] Further improvement, the connection between the rotating shaft and the separation cylinder is divided into two end connection treatments, one end is the first connection close to the direction of the garbage collection device, and the other end is the second connection close to the direction of the driving device; the first connection includes a connecting block, the connecting block is provided with an arc-shaped groove for accommodating the end of the rotating shaft, the separation cylinder at the liquid discharge port of the first connection is provided with a hanging plate in the vertical direction, the hanging plate has a separation cavity with the inner side wall of the liquid discharge port, the bottom end of the hanging plate is provided with an upwardly extending opening slot, the separation cavity is provided with two connecting columns located on the two sides of the opening slot respectively, the connecting block is screw-connected with the connecting columns, and the opening slot and the arc-shaped groove form a rotating space of the rotating shaft; the separation cylinder at the second connection is provided with a positioning groove matched with the end of the rotating shaft on the inner side wall of the liquid discharge port, and the outer side wall of the separation cylinder at the positioning groove is provided with a boss; after such arrangement, no additional mounting port is needed, and the rotating shaft can be mounted only through the liquid discharge port, so that the mounting of the rotating shaft is more convenient, and the parts are relatively less, so that the production efficiency is higher and the production cost is lower.

[0011] Further improvement, the filter holes on the filter screen are conical holes with an outer diameter larger than an inner diameter, the hole size on the outer circumferential wall is larger than the hole size on the inner circumferential wall; after such arrangement, the particles can be filtered on the filter screen as much as possible, so as to be conveyed to the extrusion end by the screw rod for extrusion dewatering, and the filter holes also make the wastewater easier to be filtered out and make the cleaning device easier to clean the filter holes, so that the filter holes can be effectively prevented from being blocked.

[0012] Further improvement, the liquid discharge port is a square opening, the length of the long side of the square opening is equal to the diameter of the filter screen, and the length of the short side of the square opening is equal to the axial length of the filter screen; the inner diameter of the filter screen is equal to the outer diameter of the screw rod; when the filter screen is installed, it is directly pushed into the dewatering seat body from the liquid discharge port, the assembly stroke is short, the installation is convenient, and the assembly efficiency can be greatly improved.

[0013] Further improvement, the inner wall of the separation cylinder is provided with an inner recess for accommodating the filter screen, the lower part of the inner recess overlaps the liquid discharge port; and the filter screen is rotationally fitted on the inner recess; after such arrangement, the stability of the filter screen is good, and the axial sliding of the filter screen in the use process is not prone to occur, the solid-liquid separation effect is ensured, and the probability of particles entering the sewer is reduced; and the inner recess is easy to process, and the production cost can be reduced.

[0014] After the above structure is adopted, compared with the prior art, the present application has the following advantages:

[0015] 1) since the dehydration device is connected after the garbage crushing device, the waste water is discharged into the sewer pipe through the liquid discharge outlet, and the filter screen is arranged on the dehydration device at the liquid discharge outlet, which can ensure that the waste water filtered out is directly discharged into the liquid discharge outlet after the garbage in the dehydration device stays at the filter screen for a short time, and the kitchen garbage will not directly fall into the liquid discharge outlet, but will be pushed by the screw rod of the dehydration device to the solid discharge outlet; in addition, the filter screen is always kept unobstructed by the self-cleaning device arranged at the filter screen, so that the filter screen will not be blocked, further ensuring the filtering effect of the kitchen garbage, ensuring that the garbage entering the next step of extrusion is drier, so that the collected garbage is in the form of solid blocks or strips, so it is easy to handle and no seepage occurs, which is more convenient to pour;

[0016] 2) the self-cleaning device adopts the structure of the gear ring, which is simple in structure and small in size, and the teeth on the gear ring have stronger plug-in force on the filter hole due to the structural characteristics, so the cleaning capacity is strong and the service life is long;

[0017] 3) the connection structure of the two ends of the rotating shaft is different, one end is provided with a positioning groove, and the other end is connected with the separation cylinder through a connecting block to ensure the installation of the rotating shaft, so that when the rotating shaft is installed, one end is directly inserted into the positioning groove, the other end is placed on the arc-shaped groove of the connecting block, and then connected with the connecting column, so that the installation is very convenient; in addition, the separation cylinder is provided with a boss on the outer side wall of the positioning groove, which ensures the wall thickness of the positioning groove and increases the strength of the side wall;

[0018] 4) the shape of the filter hole on the filter screen is large outside and small inside, which can ensure the residence area of the garbage from inside to outside, and the teeth on the gear ring can be inserted into the filter hole from outside to inside. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of the kitchen garbage disposer with a self-cleaning device.

[0020] Figure 2 is a sectional view of the dehydration device in the application.

[0021] Figure 3 is an exploded structural schematic view of Figure 2 .

[0022] Figure 4 is a structural schematic view of the self-cleaning device in the application.

[0023] Figure 5 is a structural schematic view of the filter screen in the application.

[0024] Figure 6 is a structural schematic view of the separation cylinder in the application.

[0025] Figure 7 is another direction structure diagram of Figure 6 .

[0026] Figure 8 is the structure diagram of the screw in the application.

[0027] Figure 9 is the structure diagram of the lateral of the separating cylinder in the application.

[0028] Figure 10 is another direction structure diagram of Figure 9 .

[0029] 1, water tank; 2, frame; 3, garbage crushing device; 4, driving device; 5, garbage collecting device; 6, dewatering device; 7, separating cylinder; 8, screw; 9, filter screen; 10, cleaner; 11, gear; 12, gear slot; 13, connecting block; 14, rotating shaft; 15, gear ring; 16, filter hole; 17, connecting column; 18, opening slot; 19, hanging plate; 20, boss; 21, feeding port; 22, solid discharge port; 23, connecting port; 24, liquid discharge port; 25, positioning slot; 26, inner recess; 27, groove; 28, extrusion head; 29, outer conical surface; 30, thread I; 31, thread II; 32, tooth-shaped slot. DETAILED DESCRIPTION

[0030] The application will be further described in detail in connection with the specific embodiments.

[0031] is another direction structure diagram of Figures 1-7The structure diagram of the kitchen garbage disposer with the self-cleaning device shows that it comprises a frame 2 with a sink 1 mounted on the top, a garbage crushing device 3 mounted below the sink 1 and communicated with the water outlet of the sink, the sink 1 is a common sink for household kitchen, so the kitchen garbage disposer can be integrated in the household kitchen, the kitchen garbage disposer further comprises a separation cylinder 7, a dehydration device 6, a driving device 4 connected with the dehydration device 6 and a garbage collecting device 5; the separation cylinder 7 is provided with an inlet 21 communicated with the garbage crushing device 3, a solid outlet 22 communicated with the garbage collecting device 5, a connecting port 23 connected with the driving device 4 and a liquid outlet 24 for discharging waste water; the dehydration device 6 is located in the separation cylinder 7, the dehydration device 6 comprises a screw rod 8 and a pressing head, the outer circumferential surface of the end of the screw rod 8 close to the solid outlet is a tapered surface, the pressing head is a hollow tapered body, the hollow inner side wall of the pressing head is matched with the tapered surface of the screw rod 8, the end of the screw rod 8 close to the pressing head is provided with a polygonal counterbore, the pressing head is provided with a protrusion matched with the counterbore for limiting the screw rod 8 and the pressing head in the circumferential direction, the bottom of the counterbore is provided with a threaded hole, the protrusion of the pressing head 28 is provided with a through hole, a screw is screwed through the through hole and the threaded hole, so as to connect the screw rod 8 and the pressing head, the outer circumferential surface of the pressing head is provided with a multi-start thread, and the outer circumferential surface of the screw rod 8 except the part connected with the pressing head is provided with a double-start thread, the number of the thread is set according to the amount of the mixed liquid to be conveyed, so that the structure of the screw rod 8 and the pressing head is relatively simple and easy to be processed, so that the production cost is reduced and the extrusion efficiency is higher; the thread on the outer side wall of the pressing head 28 is connected with the thread on the outer side wall of the screw rod 8; the dehydration device 6 is provided with a filter screen 9 at one end of the liquid outlet 24 for preventing the garbage from blocking the liquid outlet 24, the outer side of the filter screen 9 is provided with a self-cleaning device for cleaning the garbage, the self-cleaning device is connected with the separation cylinder 7 at the liquid outlet 24; of course, the self-cleaning device can also be arranged on the inner side of the filter screen 9.

[0032] The filter screen 9 is in the shape of a cylinder, a plurality of rows of filter holes 16 are arranged on the circumferential wall in the circumferential direction, and the filter screen 9 is sleeved on the tail of the screw rod 8 in the dehydration device 6.

[0033] The self-cleaning device comprises a cleaner 10 and a rotating shaft 14, the cleaner 10 is tightly connected with the rotating shaft 14, the two ends of the rotating shaft 14 are rotatably connected with the separation cylinder 7, a plurality of rows of gear rings 15 are arranged on the outer circumferential wall of the cleaner 10 in the circumferential direction, that is, the rotating shaft 14 is connected with a plurality of gear rings 15 in series, and the rotating shaft 14 can drive the gear rings 15 to rotate, the teeth on the gear rings 15 are inserted with or separated from the filter holes 16 on the filter screen 9, so that the gear rings 15 can also drive the filter screen 9 to rotate, so that the gear rings 15 can dredge the filter holes 16 on the filter screen 9 and prevent the filter holes 16 from being easily blocked, thereby prolonging the maintenance period of the filter screen 9 and the continuous use time of the equipment, and the user has a good experience; one end of the rotating shaft 14 is connected with the driving device 4 through a transmission mechanism.

[0034] In this embodiment, the transmission mechanism comprises a gear 11 connected to one end of the rotating shaft 14 and circumferentially limited, the tail of the screw rod 8 is provided with a plurality of concave tooth grooves 12 arranged in the circumferential direction, and the gear 11 is engaged with the tooth groove 12 for transmission.

[0035] The transmission mechanism can also be other structures, such as a belt pulley transmission mechanism, a ratchet mechanism, etc.

[0036] The connection between the rotating shaft 14 and the separation cylinder 7 is divided into two ends, one end is the first connection close to the garbage collecting device 5, and the other end is the second connection close to the driving device 4; the first connection comprises a connecting block 13 provided with an arc-shaped groove for accommodating the end of the rotating shaft 14, the separation cylinder 7 at the liquid discharge port 24 is provided with a hanging plate 19 in the vertical direction, the hanging plate 19 has a separation cavity between the inner side wall of the liquid discharge port 24, the bottom end of the hanging plate 19 is provided with an upwardly extending open slot 18, the separation cavity is provided with two connecting columns 17 located on both sides of the open slot 18, the connecting block 13 is screw-connected with the connecting columns 17, and the open slot 18 and the arc-shaped groove form a rotating space of the rotating shaft 14; the second connection of the separation cylinder 7 is provided with a positioning groove 25 matched with the end of the rotating shaft 14 on the inner side wall of the liquid discharge port 24, and the separation cylinder 7 is provided with a boss 20 on the outer side wall at the positioning groove 25.

[0037] The filter hole 16 on the filter screen 9 is a tapered hole with an outer diameter larger than an inner diameter.

[0038] The liquid discharge port 24 is a square opening, and the length of the long side of the square opening is equal to the diameter of the filter screen 9, and the length of the short side of the square opening is equal to the axial length of the filter screen 9; the inner diameter of the filter screen 9 is equal to the outer diameter of the screw rod 8.

[0039] The inner wall of the separation cylinder 7 is provided with an inner recess 26 for accommodating the filter screen 9, and the lower part of the inner recess 26 overlaps with the liquid discharge port 24; the filter screen 9 is rotationally fitted on the inner recess 26.

[0040] In another embodiment, the self-cleaning device comprises a cleaner 10 and a rotating shaft 14, the cleaner 10 is fixedly connected with the rotating shaft 14, and the two ends of the rotating shaft 14 are rotationally connected to the separation cylinder 7; the cleaner 10 is a brush, and the free end of the brush is located in the filter hole 16; one end of the rotating shaft 14 is connected with the driving device 4 through a transmission mechanism.

[0041] As Figure 2 , Figure 8 and Figure 9As shown, the outer circumferential surface of the end of the screw 8 close to the solid discharge port 22 of the dewatering device 6 is an outer taper surface 29, and the extrusion head 28 is a hollow taper body, the hollow inner side wall of the extrusion head 28 cooperates with the outer taper surface 29 of the screw 8, the end of the screw 8 close to the extrusion head 28 is provided with a polygonal counterbore, and the extrusion head 28 is provided with a protrusion for limiting the mutual circumferential position of the screw 8 and the extrusion head 28, the bottom of the counterbore is provided with a threaded hole, and the protrusion of the extrusion head 28 is provided with a through hole, a screw is screwed through the through hole and the threaded hole, thereby connecting the screw 8 and the extrusion head 28, so that the structure of the screw 8 and the extrusion head 28 is relatively simple and easy to process, thereby reducing the production cost; the threads on the outer side wall of the extrusion head 28 are connected with the threads on the outer side wall of the screw 8.

[0042] As shown in Figure 2 and Figure 8 , the outer circumferential wall of the thread root of the screw 8 below the feed inlet 21 of the separation cylinder 7 has an inner recessed groove 27, the width of the groove 27 is greater than or equal to the axial width of the feed inlet 21 (in this case, greater than); the threads on the outer circumferential side wall of the screw 8 are two, one of which is thread I 30, the starting point of which is located at the connection between the screw 8 and the extrusion head 28, and the end point of which is located on the groove 27; the other is thread II 31, the starting point of which is located at the connection between the screw 8 and the extrusion head 28, and the end point of which is located at the end of the screw 8 away from the extrusion head 28, that is, the length of thread II 31 is greater than the length of thread I 30; the top circle diameters of thread I 30 and thread II 31 are always the same.

[0043] As shown in Figure 10 , the filter structure is located in the separation cylinder 7, and the separation cylinder 7 is provided with a plurality of tooth-shaped grooves 32 on the inner circumferential wall where the feed inlet 21 is located in the circumferential direction, and a special-shaped tooth is formed between two adjacent tooth-shaped grooves 32, which can block large particles and form a coarse filtering effect, and at the same time, the large particles can be ground when the screw 8 rotates, so that the large particles are broken and more easily extruded and dewatered at the extrusion end; the groove bottom of the tooth-shaped groove 32 is an arc surface, one side of the arc surface groove bottom is one side of the tooth top of the special-shaped tooth, and the other side of the arc surface groove bottom is one side of the tooth root of the adjacent special-shaped tooth.

[0044] The filter structure is located in the separation cylinder 7, and the filter structure is an annular filter screen 16; the liquid discharge port 24 is a square opening, and the length of the long side of the square opening is equal to the diameter of the filter screen 16, and the length of the short side of the square opening is equal to the axial length of the filter screen, so that when the filter screen 16 is installed, it is directly pushed into the separation cylinder 7 from the liquid discharge port 24, and the installation is relatively convenient; the inner diameter of the filter screen 16 is equal to the outer diameter of the screw 8, and the filter screen 16 is located between the end of thread I 30 and the end of thread II 31, so that the particles on the filter screen 16 can be transported to the extrusion end by thread II 31, reducing the probability of filter screen 16 blockage and prolonging the maintenance cycle.

[0045] In addition, the inner wall of the pressing head 28 in the separation cylinder 7 has a plurality of curvedly arranged pressing strips extending to the end; and the thread on the pressing head 28 is a multi-start thread.

[0046] After the kitchen waste is crushed by the waste crushing device 3, the solid-liquid mixture enters the separation cylinder 7 through the pipe from the feed inlet 21 of the separation cylinder 7. The mixture first falls into the groove 27 on the screw rod 8 for residence, so that most of the water flows to the liquid discharge outlet 24 of the separation cylinder 7, and most of the larger particles are separated here and are carried by the screw rod to the pressing end, and after the mixture is filtered at the filter screen 16, the liquid is discharged from the liquid discharge outlet 24 to the sewer pipe, and the particles on the filter screen 16 are transported by the screw rod 8 to the pressing end for dewatering. Of course, the water dewatered from the pressing end also flows backward to the liquid discharge outlet 24 and is discharged to the sewer pipe. Under the driving of the driving device, the mixture after the initial filtration is pushed to the front end of the screw rod 8 and is sent into the screw groove at the pressing head 28. At the initial start, the profiled teeth formed by the tooth-shaped grooves on the inner wall of the separation cylinder 7 have an initial force on the large particles of garbage, which first step presses the large particles of garbage to form small particles of garbage, so as to be more convenient to push to the front end of the screw rod. After the small particles of garbage are pressed by the pressing head, they are discharged from the solid discharge outlet 22 of the dewatering device, and the waste water is discharged from the water outlet device to the sewer pipe. At this time, the garbage discharged from the solid discharge outlet 22 is relatively dry, which is convenient for directly pouring into a garbage can or directly transferred to other equipment for fermentation treatment.

[0047] The above description is only a preferred and feasible embodiment of the present application, and cannot limit the scope of the present application. For those skilled in the art, various changes of the technical solutions and technical concepts of the present application should be within the protection scope of the claims of the present application.

Claims

1. A kitchen garbage disposer with self-cleaning device, comprising a garbage crushing device (3) installed below a sink (1) and communicating with the water outlet of the sink (1), characterized in that: The kitchen garbage disposer further comprises a separation cylinder (7), a dewatering device (6), a driving device (4) connected with the dewatering device (6), and a garbage collecting device (5); the dewatering device (6) is located in the separation cylinder (7), the separation cylinder (7) is provided with four through holes, the first through hole is a feeding port (21) communicated with the garbage crushing device (3), the second through hole is a solid discharge port (22) communicated with the garbage collecting device (5), the third through hole is a connecting port (23) connected with the driving device (4), and the fourth through hole is a liquid discharge port (24) for discharging waste water; the dewatering device (6) is provided with a filter screen (9) at one end of the liquid discharge port (24); the separation cylinder (7) is provided with a self-cleaning device for cleaning the filter screen (9); The dewatering device (6) comprises a screw rod (8) and an extrusion head rotatably connected in the separation cylinder (7); the filter screen (9) is in a cylindrical shape, and a plurality of rows of filter holes (16) are arranged on the circumferential wall in the circumferential direction; the filter screen (9) is sleeved on the tail of the screw rod (8) in the dewatering device (6). The filter holes (16) on the filter screen (9) are tapered holes with large outer diameter and small inner diameter; the size of the hole on the outer circumferential wall is larger than that of the hole on the inner circumferential wall. The outer circumferential surface of the tail of the screw rod (8) near the solid discharge port is an outer tapered surface; the extrusion head is a hollow tapered body; the end of the tail of the screw rod (8) is provided with a polygonal counterbore; the extrusion head is provided with a protrusion for limiting the screw rod (8) and the extrusion head in the circumferential direction; the threads on the outer side wall of the extrusion head (28) are connected with the threads on the outer side wall of the screw rod (8). A plurality of tooth-shaped grooves (32) are arranged on the inner circumferential wall of the separation cylinder (7) in the circumferential direction at the feeding port (21); a special-shaped tooth is formed between two adjacent tooth-shaped grooves (32). The self-cleaning device comprises a cleaner (10) and a rotating shaft (14); one end of the rotating shaft (14) is connected with the driving device (4) through a transmission mechanism; the transmission mechanism comprises a gear (11) connected with one end of the rotating shaft (14) and limited in the circumferential direction; the tail of the screw rod (8) is provided with a plurality of concave tooth grooves (12) arranged in the circumferential direction; the gear (11) is in meshing transmission with the tooth grooves (12).

2. The garbage disposer with self-cleaning device according to claim 1, wherein: The self-cleaning device is located on the outer side of the filter screen (9) and connected with the separation cylinder (7) at the liquid discharge port (24).

3. The garbage disposer with self-cleaning device according to claim 2, wherein: The cleaner (10) is tightly connected with the rotating shaft (14); both ends of the rotating shaft (14) are rotatably connected with the separation cylinder (7); a plurality of rows of gear rings (15) are arranged on the outer circumferential wall of the cleaner (10) in the axial direction; the teeth on the gear rings (15) are inserted into or separated from the filter holes (16) on the filter screen (9).

4. The garbage disposer with self-cleaning device according to claim 2, wherein: The cleaner (10) is fixedly connected with the rotating shaft (14); both ends of the rotating shaft (14) are rotatably connected with the separation cylinder (7); the cleaner (10) is a brush, and the free end of the brush is located in the filter hole (16).

5. The garbage disposer with self-cleaning device according to claim 3 or 4, characterized in that: The connection of the rotating shaft (14) and the separation cylinder (7) is divided into two ends, one end is the first connection near the garbage collection device (5), the other end is the second connection near the driving device (4); the first connection includes a connecting block (13), the connecting block (13) is provided with an arc-shaped groove for accommodating the end of the rotating shaft (14), the separation cylinder (7) at the liquid discharge port (24) is provided with a hanging plate (19) in the vertical direction, the hanging plate (19) and the inner side wall of the liquid discharge port (24) have a separation cavity, the bottom end of the hanging plate (19) is provided with an upwardly extending opening slot (18), the separation cavity is provided with two connecting columns (17) located on both sides of the opening slot (18), the connecting block (13) and the connecting column (17) are screw connected, and the opening slot (18) and the arc-shaped groove form a rotating space of the rotating shaft (14); the second connection of the separation cylinder (7) is provided with a positioning groove (25) matched with the end of the rotating shaft (14) on the inner side wall of the liquid discharge port (24), and the separation cylinder (7) is provided with a boss (20) on the outer side wall at the positioning groove (25).

6. The garbage disposer with self-cleaning device according to claim 2, wherein: The liquid discharge port (24) is a square opening, and the length of the long side of the square opening is equal to the diameter of the filter screen (9), and the length of the short side of the square opening is equal to the axial length of the filter screen (9); the inner diameter of the filter screen (9) is equal to the outer diameter of the screw rod (8).

7. The garbage disposer with self-cleaning device according to claim 1, wherein: The inner wall of the separation cylinder (7) is provided with an inner recess (26) for accommodating the filter screen (9), and the lower part of the inner recess (26) overlaps with the liquid discharge port (24); the filter screen (9) is rotationally fitted on the inner recess (26).

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