CN115613662A - A deodorizing system and its intelligent toilet - Google Patents

Description

A deodorizing system and its intelligent toilet

technical field

The invention belongs to the technical field of toilet deodorization, and in particular relates to a deodorization system and an intelligent toilet.

Background technique

The toilet is a kind of sanitary ware that is used in a sitting position. It provides a sanitary channel for the treatment of excrement in the living space. The toilet is equipped with a water seal and a water cavity. The water seal prevents the odor in the sewage collection pipe It enters through the sewage discharge end of the toilet, and the water discharged from the water tank of the toilet is sprayed out from the drain hole through the water cavity, which is convenient for cleaning the inside of the toilet. However, during the use of the toilet, the excrement cannot be washed away in time. , The odor produced by excrement will quickly diffuse into the surrounding air, affecting the air quality of the bathroom, so it is necessary to deal with the odor produced by excrement.

For example, the Chinese patent with the notification number CN103628543A discloses a deodorizing toilet, which includes a toilet body and a flushing tank, and also includes an exhaust box, the bottom of the exhaust box is provided with an exhaust channel, and the exhaust The lower opening of the air channel is connected to the defecation channel in the main body of the toilet, the exhaust channel has a built-in micro-exhaust device, the bottom side of the exhaust box is provided with an air extraction hole, and the inner wall of the main body of the toilet is provided with An air extraction groove communicated with the air extraction hole, the inner wall of the toilet main body is provided with an air extraction groove communicated with the air extraction hole, so that the odor in the toilet can be sucked away and discharged together with the feces , so as to solve the problem of odor, and at the same time, due to the sealing cover, it can prevent the external odor from flowing back along the exhaust pipe, and further prevent the generation of ozone.

However, the above solution has the following disadvantages: the exhaust channel in the above patent is directly connected to the defecation channel, the sealing cover is prone to deformation during long-term rotation and use, and the odor and insects in the defecation channel are easy to enter the exhaust box end , and finally discharged through the exhaust hole, and when the exhaust channel and the defecation channel are in a connected state, if the micro exhaust device fails or is delayed in opening, the odor in the defecation channel will be discharged through the exhaust hole at the first time. It is a problem to be solved now that the odor generated when the toilet is in use is effectively discharged into the defecation channel, and the whole process of odor discharge will not occur backflow.

For this reason, we propose a deodorizing system and its smart toilet to solve the problems mentioned in the above-mentioned background technology.

Contents of the invention

The object of the present invention is to provide a deodorizing system and its intelligent toilet to solve the problems in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A deodorization system, comprising an air extractor, an air extraction pipe and an exhaust pipe respectively connected to its inlet and exhaust ends, the outlet side of the exhaust pipe is connected to a water seal elbow, and the water seal recess of the water seal elbow is provided with a convex The pipe body is sealed with an elastic water bag at the port of the convex pipe body, and a sleeve column is arranged under the elastic water bag. There is an air-push down-moving component between the cylinder columns. When the air guide pipe discharges air into the sleeve column, the air-push down-moving component drives the elastic water bag to move down to expand the capacity. At this time, the water seal liquid level in the water seal elbow drops to In the failure position, the exhaust pipe discharges the odor absorbed by the suction pipe through the outlet side of the water-sealed elbow.

Preferably, the inlet end of the air extraction pipe is provided with a filter screen and a waterproof and breathable membrane respectively from the outside to the inside, and the included angle between the plane where the centerline of the air extraction pipe is located and the plane where the horizontal line is located is 20°-60°.

Preferably, the edge of the upper port of the convex pipe body is provided with an anti-off groove, the edge of the upper end surface of the elastic water bag is provided with an anti-off block that is sealed and inserted on the anti-off groove, and the air push down component includes an airtight Slide and insert the return spring sleeve rod on the sleeve column. The lower and upper ends of the return spring sleeve rod are respectively provided with an airtight slider and a top fixing plate. Fixedly arranged on the elastic water bag, the air outlet side of the air duct is located above the side of the airtight slider, and the gas discharged into the air duct pushes the airtight slider to move down against the reverse force of the return spring sleeve rod.

Preferably, the exhaust side of the water-sealed elbow is connected with a water injection pipe, and the water injection pipe is provided with a cleaning pipe connected with the exhaust pipe, and the liquid outlet side of the cleaning pipe faces the air inlet side of the waterproof breathable membrane, and the water injection pipe A first one-way valve and a second one-way valve are respectively communicated with the cleaning pipe.

Preferably, the water-sealed elbow is located at the lower part of the convex pipe body, and the detachable sealing sleeve is provided with a leak-proof cover, and the sealing sleeve on the bottom surface of the leak-proof cover is fixed on the sleeve column, and the upper part of the side wall of the leak-proof cover is provided with an overflow hole.

An intelligent toilet, comprising the deodorization system, the air intake end of the air suction pipe is connected to the inner wall of the toilet body, the air suction pipe sucks the odor generated by the toilet body, and the inside of the toilet body is There is a defecation channel connected with the external sewage pipe, the air outlet side of the water-sealed elbow is connected to the defecation channel, and a cover guide plate is arranged on the top wall of the defecation channel below the air outlet side of the water-sealed elbow, and the bottom of the sleeve column The end is fixedly arranged on the outer surface of the defecation channel, the body of the toilet is provided with a water chamber connected with the water tank, and the water inlet end of the water injection pipe is connected with the water chamber.

Preferably, the outer surface of the defecation channel is provided with a water barrier block located below the side of the sleeve column, a liquid level switch is embedded in the water barrier block, the liquid level switch is connected in series with the air pump control circuit, and the toilet There is a PLC controller on the body, and the PLC controller is electrically connected to the exhaust motor. When the leakage water in the leak-proof cover flows into the height of the liquid level switch through the overflow hole, the liquid level switch drives the exhaust machine to work through the external relay, and The preset water leakage warning light on the PLC controller lights up.

Preferably, a drainage hole is provided on the outer wall of the defecation channel between the sleeve column and the water barrier, and a one-way floor drain is provided on the drainage hole.

Compared with prior art, the beneficial effect of the present invention is:

1. The water block is used to intercept the excess water discharged from the overflow hole. When the leakage water in the leak-proof cover flows into the height of the liquid level switch through the overflow hole, the liquid level switch drives the air pump to work through the external relay, and the PLC control The preset water leakage warning light on the toilet is turned on to realize the intelligence in the deodorization process of the toilet body. The backflow of the sealed elbow, the continuous operation of the air extractor effectively avoids the backflow of the odor of the water-sealed elbow, and realizes the anti-reflux function of the odor after the leakage of the water-sealed elbow 4;

2. The air extractor inhales the odor generated in the toilet body when going to the toilet through the exhaust pipe end, and introduces it into the water-sealed elbow through the exhaust pipe, and at the same time, the air guide pipe introduces part of the air in the exhaust pipe to the inner cavity of the sleeve column Above, the air introduced into the inner cavity of the sleeve column overcomes the reverse force generated by the return spring sleeve rod, causing the elastic water bag to move downward and deform, thereby expanding the capacity. At this time, the water sealing liquid in the water sealing elbow will flow into the On the expanded elastic water bag, the height of the water sealing liquid in the water sealing elbow is reduced, which promotes the conduction state in the water sealing elbow. At this time, the odor that flows into the water sealing elbow through the exhaust pipe is discharged. When the user presses the drain button of the water tank after going to the toilet, part of the liquid water flowing through the water cavity will flow into the water injection pipe and the cleaning pipe in turn , the water injection pipe discharges liquid water into the water seal elbow to raise the water seal liquid level, and the water seal function of the water seal elbow recovers, and at the same time, the water discharged from the cleaning pipe cleans the channel in the exhaust pipe, the filter screen and the waterproof and breathable membrane For cleaning, the air extractor shuts off after a delay of 2 seconds after flushing the toilet body, and the reset spring sleeve pushes the elastic water bag to reset through the top fixing plate, and the reset of the elastic water bag squeezes the excess liquid water in the water-sealed elbow into the defecation channel Inside, effectively prevent backflow during the odor discharge process.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the overall structure of the present invention;

Fig. 2 is a partial schematic view of the water-sealed elbow and overflow hole area of Fig. 1;

Fig. 3 is a schematic front view of the water-sealed elbow area of Fig. 2;

Fig. 4 is a partial schematic diagram of the area of the convex tube body in Fig. 2;

Fig. 5 is a schematic structural diagram of the elastic water bag pull-down expansion state on the water-sealed elbow of Fig. 4;

Fig. 6 is a schematic diagram of the separation structure of the water-sealed elbow, the convex pipe body, the elastic water bag, the support plate, the return spring sleeve rod and the sleeve column of the present invention.

In the figure: 1. Air extractor; 2. Exhaust pipe; 3. Exhaust pipe; 4. Water-sealed elbow; 5. Convex pipe body; 6. Elastic water bag; 7. Sleeve column; 9. Filter screen; 10. Waterproof and breathable membrane; 11. Anti-detachment groove; 12. Anti-detachment block; 13. Return spring sleeve rod; 14. Airtight slider; 15. Top solid plate; 16. Water injection pipe; 17. Cleaning pipe; 18, first one-way valve; 19, second one-way valve; 20, leak-proof cover; 21, defecation channel; 22, water chamber; 23, water block; 24, liquid level switch; 25, PLC controller; 26, drainage hole; 27, one-way floor drain body; 101, toilet seat body; 201, overflow hole; 202, inspection door; 203, cover guide plate.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Referring to Fig. 1-6, the present invention provides a technical solution:

Embodiment one:

A deodorization system, including an air extractor 1, an air extraction pipe 2 and an exhaust pipe 3 respectively connected to its inlet and exhaust ends, the air extraction pipe 2 is used to inhale odor, the air outlet side of the exhaust pipe 3 and a water-sealed elbow 4 connections, the water-sealed elbow 4 has a water-sealed V-shaped portion, the water-sealed elbow 4 water-sealed recess is provided with a convex pipe body 5, the upper end surface of the convex pipe body 5 is open, and the port portion of the convex pipe body 5 is sealed with a Elastic water bag 6, elastic water bag 6 is made of silicon rubber, which has good anti-corrosion performance, and has a large deformation force when subjected to external pulling force, which is convenient for changing the volume of elastic water bag 6. Elastic water bag 6 can adjust the convex tube The opening of the body 5 is water-sealed, the elastic water bag 6 is provided with a sleeve column 7, the exhaust pipe 3 is provided with an air guide tube 8 communicating with the sleeve column 7, the elastic water bag 6 and the sleeve column 7 There is an air-push down-moving assembly between them, as shown in Figure 5, when the air guide tube 8 discharges air into the sleeve column 7, the air-push down-moving assembly drives the elastic water bag 6 to move down for expansion, and is located in the water-sealed elbow 4 The liquid water inside flows into the expanded elastic water bag 6. At this time, the water seal liquid level in the water seal elbow 4 drops to the failure position, and the inside of the water seal elbow 4 is in a conduction state, and the exhaust pipe 3 connects the exhaust pipe. 2. Absorbed odor is discharged through the outlet side of the water-sealed elbow 4.

Embodiment two:

On the basis of Embodiment 1, the air extraction pipe 2 is further described, the air intake end of the air extraction pipe 2 is respectively provided with a filter screen 9 and a waterproof breathable membrane 10 from the outside to the inside, the filter screen 9 avoids the entry of large particles of impurities, and the waterproof breathable membrane 10 Avoid the inhalation of water droplets, and play a preliminary waterproof protection for the air extractor 1. At the same time, the setting of the waterproof and breathable membrane 10 will not affect the inhalation of odor. 2. The included angle between the plane where the center line is located and the plane where the horizontal line is located is 20°. The inclined setting of the exhaust pipe 2 prevents impurities such as sewage from accumulating on the exhaust pipe 2; The water injection pipe 16 is provided with a cleaning pipe 17 connected with the air extraction pipe 2, and the liquid outlet side of the cleaning pipe 17 faces the air inlet side of the waterproof gas-permeable membrane 10, and the liquid water flowing through the water-proof gas-permeable membrane 10 will meet the air inlet side of the water-proof gas-permeable membrane 10. The accumulated dust and other impurities are cleaned. The water injection pipe 16 and the cleaning pipe 17 are respectively connected with a first check valve 18 and a second check valve 19. The first check valve 18 makes the water injection pipe 16 only have downward flow direction, while avoiding the reflux of the odor in the water-sealed elbow 4, and the setting of the second one-way valve 19 makes the cleaning pipe 17 only have a flow direction to the left, and the overflow into the odor in the cleaning pipe 17 is carried out. barrier to realize the anti-reflux function of the odor of the water injection pipe 16 and the cleaning pipe 17;

The included angle between the plane where the centerline of the air extraction pipe 2 is located and the plane where the horizontal line is located can also be 60°.

Embodiment three:

On the basis of Embodiment 1, the pneumatic push-down assembly is further described. The edge of the upper port of the convex pipe body 5 is provided with an anti-loosening groove 11, and the section of the anti-loosening groove 11 is a superior arc groove structure. The anti-off block 12 inserted in the anti-off groove 11 is sealed to prevent the off-off block 12 after it is installed. The air push down component includes a reset spring sleeve rod inserted on the sleeve column 7 in an airtight slide 13. The lower and upper ends of the return spring cover rod 13 are respectively provided with an airtight slider 14 and a top fixing plate 15. The return spring cover rod 13 can generate an upward spring thrust on the top support plate 15, and the two sides of the upper end surface of the top support plate 15 A sealing rubber strip is bonded to the top of the body, and the sealing rubber strip can be closely attached to the outside of the bottom of the convex tube body 5, which improves the contact and sealing effect between the top fixing plate 15 and the bottom end surface of the convex tube body 5, and the airtight slider 14 slides In the sleeve column 7, a rubber ring is bonded to the outer edge of the side wall of the airtight slider 14, so that the space above the airtight slider 14 in the sleeve column 7 is sealed, and the upper end surface of the top fixing plate 15 is clamped. Or the screw connection method is fixed on the pre-fixed point on the bottom end surface of the elastic water bag 6, the air outlet side of the air guide tube 8 is located above the side of the airtight slider 14, and the air guide tube 8 discharges gas to push the airtight slider 14 to overcome the return spring Sleeve rod 13 reverses the force to move down, and after the gas circulation in air duct 8 is closed, return spring sleeve rod 13 will drive airtight slider 14 to move upward, thereby reversing the air discharged into sleeve column 7 into the air duct 8.

Embodiment four:

On the basis of Embodiment 1, the water-sealed elbow 4 is further described. The water-sealed elbow 4 is located at the lower part of the convex pipe body 5 and is detachably sealed with a leak-proof cover 20. The bottom surface of the leak-proof cover 20 is sealed and fixed in the sleeve. On the column 7, the leak-proof cover 20 can temporarily receive water when the elastic water bag 6 leaks, so as to avoid the failure of the water-sealed elbow 4, and the upper part of the side wall of the leak-proof cover 20 is provided with an overflow hole 201, and the overflow hole 201 is used to discharge excess water, which is convenient for users to pay attention to and remind for maintenance.

Embodiment five:

An intelligent toilet, including a deodorizing system, the intake end of the air suction pipe 2 is connected to the inner wall of the toilet body 101, and the air suction pipe 2 sucks the odor generated by the defecation part of the toilet body 101, and the inside of the toilet body 101 is equipped with The defecation channel 21 connected with the external sewage pipe, the air outlet side of the water-sealed elbow 4 is communicated with the defecation channel 21, and the top wall of the defecation channel 21 is located below the air outlet side of the water-sealed elbow 4. Covering the guide plate 203, covering the guide plate 203 The setting of the defecation channel 21 prevents the dirt flowing through the defecation channel 21 from splashing into the air outlet side of the water seal elbow 4, and keeps the cleanliness of the air outlet side of the water seal elbow 4. The bottom end of the sleeve column 7 is fixedly arranged on the outer surface of the defecation channel 21. The toilet body 101 is provided with a water chamber 22 that communicates with the water tank, and the water inlet end of the water injection pipe 16 communicates with the water chamber 22. When the water tank on the toilet body 101 is flushed, part of the water flowing through the water chamber 22 It will flow into the water injection pipe 16 and the cleaning pipe 17 in turn, and the water seal in the water seal elbow 4 can be kept from failing due to the evaporation of the water body at all times through the setting of the water injection pipe 16, and the setting of the cleaning pipe 17 is convenient for cleaning the exhaust pipe 2. Intake side cleaning;

The outer surface of the defecation channel 21 is provided with a water barrier 23 located below the side of the sleeve column 7, and a liquid level switch 24 is embedded in the water barrier 23. The water barrier 23 is used to intercept the excess water discharged from the overflow hole 201. The bit switch 24 is set in series with the control circuit of the air extractor 1, and the toilet body 101 is provided with a PLC controller 25, the PLC controller 25 is electrically connected with the air extractor 1, and when the leakage in the leakproof cover 20 passes through the overflow hole After the 201 flows into the height of the liquid level switch 24, the liquid level switch 24 drives the air extractor 1 to work through an external relay, and the preset water leakage warning light on the PLC controller 25 lights up, realizing the intelligentization of the toilet body 101 in the process of deodorizing, During the above process, water leakage in the water seal elbow 4 leads to failure of the water seal liquid level. At this time, the odor in the defecation channel 21 will flow back through the water seal elbow 4, and the continuous operation of the air extractor 1 effectively avoids Odor backflow of water-sealed elbow 4;

On the outer wall of the defecation channel 21, a drainage hole 26 is arranged between the sleeve column 7 and the water barrier block 23. The drainage hole 26 is provided with a one-way floor drain body 27, and the one-way floor drain body 27 is provided with a deodorant floor drain in the prior art. The core facilitates the overflowing water body to be discharged into the water-sealed elbow 4.

An inspection door 202 is preset on the rear wall of the toilet body 101, and the inspection door 202 is fixed by buckling. The inspection door 202 facilitates subsequent inspection and maintenance of the area of the water-sealed elbow 4.

The working principle is as follows: when the deodorizing system on the toilet body 101 is in use, the air extractor 1 can be driven to work through the PLC controller 25, and the air extractor 1 will use the exhaust pipe 2 to remove the air generated in the toilet body 101 when going to the toilet. The odor is inhaled and introduced into the water-sealed elbow 4 through the exhaust pipe 3. At the same time, the air guide pipe 8 introduces part of the air in the exhaust pipe 3 to the inner cavity of the sleeve column 7, and then introduces it to the inner cavity of the sleeve column 7. The air overcomes the reverse force produced by the return spring sleeve rod 13, so that the elastic water bag 6 moves downward and deforms, thereby expanding the capacity. At this time, the water seal liquid in the water seal elbow 4 will flow into the expanded elastic water bag 6, the height of the water seal liquid in the water seal elbow 4 is reduced, which impels the inside of the water seal elbow 4 to be in a conduction state. At this time, the odor that flows into the water seal elbow 4 through the exhaust pipe 3 is discharged into the The end 21 of the defecation channel has a better deodorizing effect. When the user presses the drain button of the water tank after going to the toilet, part of the liquid water flowing through the water chamber 22 will flow into the water injection pipe 16 and the cleaning pipe in turn. On 17, the water injection pipe 16 discharges liquid water into the water seal elbow 4 to raise the water seal liquid level, and the water seal function of the water seal elbow 4 recovers to prevent the backflow of the odor discharge process, and at the same time, the cleaning pipe 17 discharges The water flow cleans the channel in the suction pipe 2, the filter screen 9 and the waterproof and breathable membrane 10, and the suction machine 1 is closed after 5 seconds after flushing the toilet body 101. The bag 6 resets, and the reset of the elastic water bag 6 squeezes the excess liquid water in the water-sealed elbow 4 into the defecation passage 21, waiting for the next cycle.

This embodiment provides an intelligent toilet, including the deodorizing system provided in Embodiment 1.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still It is possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (8)

1. A deodorizing system, comprising an air extractor (1) and an air extraction pipe (2) and an exhaust pipe (3) connected to its inlet and exhaust ends respectively, characterized in that: the exhaust pipe (3) is exhausted The side is connected with the water-sealed elbow (4), the water-sealed elbow (4) is provided with a convex pipe body (5), and the port portion of the convex pipe body (5) is sealed with an elastic water bag (6). A sleeve post (7) is arranged below the bag (6), an air duct (8) communicating with the sleeve post (7) is provided on the exhaust pipe (3), and the elastic water bag (6) and An air push-down component is arranged between the sleeve columns (7), and when the air guide tube (8) discharges air into the sleeve column (7), the air-push down component drives the elastic water bag (6) to move down for expansion. At this moment, the liquid level of the water seal in the water seal elbow (4) drops to the failure position, and the exhaust pipe (3) discharges the odor absorbed by the exhaust pipe (2) through the air outlet side of the water seal elbow (4). 2. A deodorizing system according to claim 1, characterized in that: the intake end of the suction pipe (2) is respectively provided with a filter screen (9) and a waterproof and breathable membrane (10) from the outside to the inside, so that The included angle between the plane where the center line of the air extraction pipe (2) is located and the plane where the horizontal line is located is 20° to 60°. 3. A deodorizing system according to claim 1, characterized in that: the edge of the upper port of the convex pipe (5) is provided with an anti-loosening groove (11), and the edge of the upper end of the elastic water bag (6) is An anti-off block (12) that is sealed and inserted on the anti-off groove (11) is provided, and the air push down assembly includes a return spring sleeve rod (13) that is airtightly slidably inserted on the sleeve column (7) , the upper and lower ends of the return spring sleeve rod (13) are respectively provided with an airtight slider (14) and a top fixing plate (15), the airtight slider (14) is slid in the sleeve column (7), and the top fixing plate (15) The upper end surface is fixedly arranged on the elastic water bag (6), the air outlet side of the air guide tube (8) is located above the side of the airtight slider (14), and the air guide tube (8) is discharged into the air to push the air Close slide block (14) overcomes back-moving spring sleeve bar (13) counteracting force and moves down. 4. A deodorizing system according to claim 2, characterized in that: the exhaust side of the water-sealed elbow (4) is connected with a water injection pipe (16), and the water injection pipe (16) is provided with and The suction pipe (2) is connected to the cleaning pipe (17), the liquid outlet side of the cleaning pipe (17) faces the air inlet side of the waterproof breathable membrane (10), and the water injection pipe (16) and the cleaning pipe (17) are respectively connected to each other. There is a first one-way valve (18) and a second one-way valve (19). 5. A deodorizing system according to claim 1, characterized in that: the water-sealed elbow (4) is located at the lower part of the convex pipe body (5) and is provided with a leak-proof cover (20) to prevent leakage. The sealing sleeve on the bottom end surface of the leakage cover (20) is fixed on the sleeve column (7), and an overflow hole (201) is provided on the upper part of the side wall of the leakage prevention cover (20). 6. An intelligent toilet, characterized in that it comprises the deodorizing system according to any one of the above claims 1-5, and the air inlet end of the air extraction pipe (2) is communicated with the inner wall of the toilet body (101) , the suction pipe (2) inhales the odor produced by the toilet body (101) defecation part, the inside of the toilet body (101) is provided with a defecation channel (21) connected with the external sewage pipe, and the water-sealed elbow (4) The air outlet side is connected to the defecation channel (21), and a cover guide plate (203) is arranged on the top wall of the defecation channel (21) below the air outlet side of the water-sealed elbow (4), and the sleeve column (7) The bottom end is fixedly arranged on the outer surface of the defecation channel (21), the toilet body (101) is provided with a water cavity (22) connected with the water tank, the water inlet end of the water injection pipe (16) and the water cavity Part (22) is connected. 7. An intelligent toilet according to claim 6, characterized in that: the outer surface of the defecation channel (21) is provided with a water-block (23) located below the side of the sleeve column (7), and the water-block (23) is embedded with a liquid level switch (24), the liquid level switch (24) is set in series with the control circuit of the air extractor (1), and the toilet body (101) is provided with a PLC controller (25) , the PLC controller (25) is electrically connected with the air pump (1), and when the leakage water in the leak-proof cover (20) flows into the height of the liquid level switch (24) through the overflow hole (201), the liquid level switch (24) ) drives the air extractor (1) to work through an external relay, and the preset water leakage warning light on the PLC controller (25) lights up. 8. An intelligent toilet according to claim 7, characterized in that: a drainage hole (26) is provided on the outer wall of the defecation channel (21) between the sleeve column (7) and the water barrier (23). ), the drain hole (26) is provided with a one-way floor drain body (27).

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