Self-cleaning pedestal pan seat ring and cover and cleaning method thereof

Abstract

The invention discloses a self-cleaning pedestal pan seat ring and cover and a cleaning method thereof. The self-cleaning pedestal pan seat ring and cover comprises a base, a seat ring and a cover, the base is mounted on the pedestal pan, and the seat ring is located in a relatively closed space defined by the cover and the base; the base is provided with a first water retaining ring which is formed by a bottom surface matched with the upper surface of the pedestal pan and a turnup matched with the outer edge of the seat ring; a cleaning water pipeline for cleaning the seat ring and water spraying holes are formed in the cover, cleaning water is sprayed out of the water spraying holes through the cleaning water pipeline to clean the seat ring, the cover and the base and then flows into the pedestal pan, and when the cover is closed, a second water retaining ring formed by the turned-over edge of the cover is matched with a first water retaining ring of the base to form a closed structure, so that it is guaranteed that the cleaning water cannot be splashed to the outside. The self-cleaning seat can realize self-cleaning of the seat ring and the cover, is simple to manufacture and mount, and is safe and convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of sanitary wares, and particularly relates to a self-cleaning toilet seat and cover and a cleaning method thereof. Background Art

[0002] With the development of society and the improvement of people's living standards, toilets are more and more widely used and are gradually developing towards intelligent toilets. While toilets bring convenience to people, there are also problems of hygiene and safety. For example, when using the toilet, the skin is in direct and close contact with the toilet seat. If the toilet seat remains contaminated with viruses and bacteria, it is easy to cause cross-infection; when a man urinates standing up, he often opens the toilet seat to avoid urine dripping on the toilet seat, but urine will inevitably drip or splash onto the upper surface of the toilet, and in most cases, it will not be cleaned in time or not cleaned thoroughly, which is easy to breed bacteria or oxidize, resulting in peculiar smells. Research shows that when the toilet flushes, the viruses and bacteria inside the toilet will be flushed out to a height of several meters, so it is advocated to close the toilet lid when flushing, but the problem brought about by this is that more viruses and bacteria will be sprayed onto the inner surface of the toilet lid, the toilet seat and the upper surface of the toilet. Therefore, it is very necessary to clean the inner surface of the toilet lid, the toilet seat and the upper surface of the toilet in time. Although there are many technical solutions for cleaning the toilet seat and the upper surface of the toilet in the patent literature, due to the complexity of the solutions or structures (using cleaning agents, disinfectants or mechanical cleaning, etc.), or the great difficulty in implementation, or the lack of practicality, there are no similar products on the market for sale at present.

[0003] Most of the currently used toilets are ceramic toilets. Ceramic is a brittle material and is prone to brittle fracture and explosion under the action of external forces. The sharp fragments are very easy to cause harm to people. It is reported that about 30,000 toilets break during use every year, causing injuries to users; however, there are no literature reports on the protective measures and technical solutions for preventing the breakage of ceramic toilets and the harm after breakage.

[0004] Most of the existing toilet seats and covers are installed in the installation holes reserved on the toilet. Since the toilet, the toilet seat and the cover are not produced by the same manufacturer and the specifications and dimensions of each product are different, the position dimensions of the installation holes in the product standard and the product are not an exact value but a numerical range. Therefore, precise assembly cannot be carried out, and only after adjusting to a suitable position can it be fixed by tightening the fixing screws; however, the fixing screws are very easy to loosen during use. After the screws loosen, the toilet seat and the cover are easy to deviate from the correct position, which not only causes inconvenience during use, but also may break and injure people due to the loss of the support of the toilet; moreover, water and urine are also very easy to enter around the fixing screws, and it is not easy to clean due to limited space, often resulting in scaling, breeding of bacteria, generation of peculiar smells, etc. around the fixing screws, becoming a hygiene dead corner. Therefore, the installation method of the existing toilet seat and cover also needs to be changed. Summary of the Invention

[0005] To solve the above-mentioned technical problems existing in the prior art, the present invention provides a self-cleaning toilet seat and cover and its cleaning method. By adopting the method of adhesive bonding installation, the seat and cover can be accurately positioned, preventing loosening during use and preventing dirt and odor from accumulating between the seat and the toilet. The cleanliness is ensured by covering the upper surface of the toilet, and the viruses and bacteria remaining on the surfaces of the seat and cover are removed by cleaning the seat and cover, so that the seat and cover are always kept clean, hygienic and odorless. At the same time, it can also improve the anti-cracking strength of the ceramic toilet and prevent the fragments generated by the cracking of the ceramic toilet from causing harm to the user.

[0006] To achieve the above object, the present invention provides the following technical solution: A self-cleaning toilet seat and cover, comprising a base and a seat and a cover installed on the base;

[0007] The base is adhesively installed on the toilet, and the seat is located in a relatively enclosed space formed by the cover and the base;

[0008] The base has a bottom surface matching the upper surface of the toilet and a first water retaining ring formed by a flanging matching the outer edge of the seat;

[0009] The cover is provided with a cleaning water pipe and spray holes for cleaning the seat. The cleaning water sprays out from the spray holes through the cleaning water pipe to clean the seat, cover and base and then flows into the toilet. When the cover is closed, the second water retaining ring formed by its flanging cooperates with the first water retaining ring of the base to form a closed structure to ensure that the cleaning water will not splash outside.

[0010] Preferably, the upper surface of the bottom surface of the base is distributed with the outer part higher and the inner part lower, so that the cleaning water can flow smoothly into the toilet, avoiding water accumulation on the base.

[0011] Preferably, the height of the first water retaining ring formed by the flanging of the base is lower than the upper surface of the seat, and the height of the first water retaining ring is 5 - 15 mm, which can both retain water and avoid human contact.

[0012] Preferably, the height of the first water retaining ring is 8 - 12 mm. It has been verified through experiments that the water retaining ring of the base will not contact the human body during use.

[0013] Preferably, the base is adhesively bonded to the toilet with a sealant and the joint is filled and smoothed with the sealant. In this way, it can not only prevent water or urine from entering the gap and generating odor, but also make the seat and cover firmly positioned, and can also solve the problem that the place where the rear part of the existing seat and cover contacts the toilet is prone to dirt accumulation and difficult to clean.

[0014] Preferably, the base is installed on the toilet through the installation holes reserved on the toilet using screws and can adopt the hinge connection method.

[0015] Preferably, the base can also be fixed to the toilet by means of sealant bonding and screw connection, making the installation of the base more firm.

[0016] Preferably, there is a gap between the outer edge of the seat ring and the first water retaining ring of the base, and the width of the gap is 3-7 mm, which can not only prevent the first water retaining ring from contacting the human body, but also enable the cleaning water for cleaning the seat ring to flow into the toilet after cleaning the base again.

[0017] Preferably, a biting structure is provided between the first water retaining ring of the base and the second water retaining ring of the cover, which has better performance in preventing the cleaning water from overflowing.

[0018] Preferably, all surfaces within the space formed by the cover and the base are coated with a non-stick coating or an antibacterial coating, which is beneficial to keeping the surfaces dry, clean and hygienic all the time.

[0019] Preferably, the cleaning water pipe can be integrated with the cover or can be set separately.

[0020] Preferably, the spray holes are evenly or irregularly distributed on the cleaning water pipe, so that the cleaning water can completely clean the cover, the seat ring and the base without leaving any sanitary dead corners.

[0021] Preferably, the self-cleaning seat ring and cover are corresponding to the seat ring and cover of the existing ordinary toilet and the seat ring and cover of the existing intelligent toilet; among them, the electromechanical device of the intelligent toilet can be directly installed on the base, which is not only simple in assembly, but also convenient in installation and maintenance. There is also an air duct and an air nozzle for drying the seat ring and the base in the cover. For an ordinary toilet, a drying device can be not added and the natural drying method can be adopted because it is more difficult to add a drying device and it is necessary to add a power supply, a blower and a control device, etc.; while for an intelligent toilet, adopting the air drying method is relatively simple and convenient because the intelligent toilet itself has a power supply, a blower and a control system, etc.

[0022] The present invention also provides a cleaning method for the seat ring and cover of an intelligent toilet, including the following steps:

[0023] 1). After the control system of the intelligent toilet detects that the user leaves the toilet, it issues an instruction to make the toilet cover fall and the second water retaining ring of the toilet cover close to the first water retaining ring of the base;

[0024] 2). Open the solenoid valve of the cleaning water, and the cleaning water sprays out from the spray holes through the cleaning water pipe in the toilet cover to clean the seat ring and the cover. The cleaning water close to the inner side of the seat ring flows directly into the toilet after cleaning the seat ring and the cover. The cleaning water close to the outer sides of the seat ring and the cover flows into the gap between the bottom surface of the seat ring and the base through the side gap between the seat ring and the base after cleaning the seat ring and the cover, and then flows into the toilet after cleaning the base;

[0025] 3) At the same time or with a delay of a few seconds (2-6 seconds), the solenoid valve of the flushing water is opened, and the flushing water flushes the inner wall of the toilet and then flushes out of the toilet together with the cleaning water, water sealing water and dirt under the action of the impact force (flush type) or siphon (siphon type);

[0026] 4). Close the solenoid valves of flushing water and cleaning water in sequence or simultaneously, and the water remaining in the pipe or on the surface gradually flows into the toilet to form water seal;

[0027] 5). Turn on the fan inside the toilet seat cover to blow off and dry the water droplets on the seat ring and cover; or open the seat ring and cover to make them upright so that the water droplets on the seat ring and cover will fall off the seat ring and cover by themselves under the action of gravity, and then turn on the fan to dry the seat ring and cover;

[0028] 6). After the seat and cover are dried, the seat falls down (when mainly used by ladies), or the seat remains in an upright position (when mainly used by men), and the toilet lid remains open, which is conducive to ventilation and drying of the seat, cover and base, and prevents the seat and cover from being in a closed and humid environment where bacteria and viruses are easily bred.

[0029] Compared with the prior art, the present invention provides a self-cleaning toilet seat and cover, which has the following features:

[0030] Beneficial effects:

[0031] (1) The present application proposes a self-cleaning toilet seat and cover, which has a base added to the existing seat and cover. First, the installation method of the existing seat and cover is changed, and the base is used as the installation platform of the seat and cover. Not only is the installation simple, convenient, accurate and firm, but it also solves the problem that the existing seat and cover installation site is dirty and difficult to clean. Second, the base is bonded to the ceramic toilet by an adhesive to form a whole, which becomes a protective shell on the upper surface of the toilet. The base and the adhesive are both tough or flexible materials, which complement the brittle material ceramic, similar to laminated glass, which greatly increases the strength of the ceramic. , it can resist the impact of external forces on the toilet and avoid the toilet from breaking. Even if the toilet breaks, the base and adhesive can fix the fragments to prevent the fragments from causing harm to the user; thirdly, the edge of the base forms an annular water retaining ring through the flange, which cooperates with the water retaining ring of the toilet cover to prevent the cleaning water from splashing out of the toilet, and can make the cleaning water clean the seat ring and cover and then clean the base; fourthly, the base shields the upper surface of the toilet and receives urine and cleaning water, and uses the structural advantage of high outside and low inside to quickly discharge the cleaning water into the toilet, solving the problem that urine on the upper surface of the existing toilet cannot be automatically cleaned.

[0032] (2) The toilet seat and cover with self-cleaning function proposed in this application adopt the method of simultaneous cleaning and flushing, achieving three uses of the cleaning water: first, cleaning the toilet seat and cover; second, cleaning the base, which is equivalent to cleaning the upper surface of the toilet; third, serving as flushing water to clean the inner wall of the toilet and participate in sewage discharge. By cleaning the toilet seat, cover, and base, it prevents virus and bacteria lifted during flushing from adhering to the toilet seat and cover, participates in sewage discharge, improves the sewage discharge capacity, and is equivalent to using flushing water to clean the toilet seat and cover, eliminating sanitation dead corners and saving water.

[0033] (3) The toilet seat and cover with self-cleaning function proposed in this application achieve self-cleaning of the toilet seat and cover through the organic combination and mutual cooperation of adding new components (such as the base, water pipes, air ducts, etc.), adopting new structures (such as fixing and bonding the base to the toilet, forming a sealed space between the base and the cover, and a mutually cooperating annular water retaining ring, etc.), and new operation methods (simultaneous cleaning and flushing in the same time period). It is not only simple in manufacturing and installation but also convenient to use and easy to promote and apply. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0035] Figure 1 It is a schematic structural diagram of the toilet seat and cover in the embodiment of this application.

[0036] Figure 2 It is a top view of the base of the toilet seat and cover in the embodiment of this application.

[0037] In the figure: 1. Cover; 2. Toilet seat; 3. Base; 11. Second water retaining ring; 12. Cleaning water pipe; 13. Spraying hole; 21. Toilet seat support; 31. First water retaining ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention to be protected, but only represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention.

[0039] Please refer to Figure 1 - Figure 2, this embodiment proposes a self - cleaning toilet seat and cover, including a base 3, a toilet seat 2 and a cover 1. The cover 1 and the toilet seat 2 are installed on the base 3 through hinges or rotating shafts. The base 3 is fixedly installed on the toilet using an adhesive. The toilet seat 2 is located in a relatively enclosed space formed by the cover 1 and the base 3, and relies on the seat support 21 (similar to the buffer pad of the existing toilet seat 2) to be seated on the base 3, with a gap of 3 - 5 mm between the toilet seat 2 and the base 3. A part of the cleaning water enters between the toilet seat 2 and the base 3 through this gap, washes the base 3 and then flows into the toilet. The base 3 has a first water - retaining ring 31 formed by a bottom surface matching the upper surface of the toilet and a flanging matching the outer edge of the toilet seat 2. The upper surface of the base 3 and the toilet are fixed by bonding and sealing to prevent cleaning water from entering the gap between them; inside the cover 1, there are cleaning water pipes 12 and spray holes 13 for cleaning the toilet seat 2. The cleaning water passes through the cleaning water pipes 12 and sprays out from the spray holes 13 to clean the cover 1, the toilet seat 2 and the base 3, and then flows into the toilet. The second water - retaining ring 11 formed by the flanging of the cover 1 cooperates with the first water - retaining ring 31 of the base 3 to ensure that the cleaning water will not splash outside.

[0040] The self - cleaning toilet seat and cover proposed in this application correspond to both the existing ordinary toilet seat and cover and the existing intelligent toilet seat and cover; the electromechanical device of the intelligent toilet can be directly installed on the base, which is not only simple in assembly but also convenient in installation and maintenance.

[0041] Inside the cover 1, there are air ducts and air nozzles for drying the toilet seat and the cover. For ordinary toilets, the air - drying device can be omitted and natural drying can be adopted because it is more difficult to add an air - drying device, which requires adding a power source, a fan and a control device, etc.; while for intelligent toilets, adopting the air - drying method is relatively simple and convenient because the intelligent toilet itself already has a power source, a fan and a control system, etc.

[0042] For the cleaning water, for ordinary toilets, the existing flushing water system can be utilized. The cleaning water pipes 12 are connected in parallel with the flushing water pipes and are switched synchronously, which is simple and easy to operate; while for intelligent toilets, there can be an independent cleaning water system, and the intelligent control system is used to more precisely control the cleaning water. The cleaning water can be turned on a few seconds before the flushing water and turned off a few seconds after the flushing water. In this way, it is easier to wash away the dirt and germs on the toilet seat 2, the cover 1 and the base 3, and it can also prevent germs from adhering to the toilet seat 2 and the cover 1 after cleaning.

[0043] The cleaning water can be hot water, and the cleaning effect of hot water is better than that of cold water. The cleaning water can be used to clean before using the toilet, which is more acceptable to users psychologically for public toilets; cleaning before use can also moisten the inner surface of the toilet, increase the water seal amount, and play a role in anti - sticking and anti - odor; cleaning with hot water before use can also heat the toilet seat 2 and improve the comfort of users in cold seasons.

[0044] When the base 3 is installed, it is adhesively bonded to the toilet with sealant, and the joint is filled and smoothed with sealant. This can not only prevent water or urine from entering the gap and generating odors, but also firmly position the seat ring 2 and the cover 1. It can also solve the problem that the areas where the rear parts of the existing seat ring 2 and the cover 1 contact the toilet are prone to dirt accumulation and are difficult to clean.

[0045] Preferably, the upper surface of the bottom surface of the base 3 is higher on the outside and lower on the inside, so that the cleaning water can flow smoothly into the toilet, avoiding water accumulation on the base 3.

[0046] The first water retaining ring 31 formed by the flanging of the base 3 has a height lower than the upper surface of the seat ring 2. The height of the first water retaining ring 31 is generally 5 - 15 mm, preferably 8 - 12 mm. It has been verified through tests that the first water retaining ring 31 of the base 3 will not contact the human body during use.

[0047] The base 3 is made of materials such as plastic or metal, preferably stainless steel. It not only has a small thickness and occupies little space, but also has high strength and will not break. When bonded to the toilet, it can also prevent injury accidents caused by the accidental breakage of the ceramic toilet.

[0048] There is a gap between the outer edge of the seat ring 2 and the first water retaining ring 31 of the base 3, generally 1 - 10 mm, preferably 3 - 7 mm. This can not only prevent the first water retaining ring 31 from contacting the human body, but also enable the cleaning water for cleaning the seat ring 2 to flow into the toilet after cleaning the base 3 again. The cleaning water can clean all the surfaces within the space enclosed by the cover 1 and the base 3 to thoroughly remove dirt, viruses, and bacteria.

[0049] When the blower is working, it can blow and wash all the surfaces within the space enclosed by the cover 1 and the base 3 to blow off the water droplets adhering to the surfaces, quickly dry all the surfaces, prevent the growth of bacteria, and prepare for the next use. The blower is preferably a thermostatic hot air blower, which can not only shorten the drying time of the seat ring 2 and the cover 1, but also heat the seat ring 2 to improve the comfort of the user in a relatively low room temperature environment.

[0050] All the surfaces within the space enclosed by the cover 1 and the base 3 preferably have functional coatings such as non-stick coatings and antibacterial coatings, which is beneficial to keeping the surfaces dry, clean, and hygienic all the time.

[0051] When in use, the cleaning water and flushing water of the toilet can have their own or common switches (such as in a common toilet) or a unified control system (such as in a smart toilet), and the appropriate switching method and time (before or after use) can be selected according to different usage places (public or household); the cleaning water and flushing water are preferably turned on and off within the same time period (the switches are synchronized or only a few seconds apart), which is not only beneficial to removing dirt, viruses, and bacteria, but also the increased water volume of the two combined is beneficial to improving the sewage discharge performance of the toilet. The cover 1 is preferably in the normally open mode (only closed during cleaning and flushing), which is beneficial to keeping the toilet seat 2 and the cover 1 ventilated and dry, and can solve the problem that the existing smart toilet cover is in the normally closed mode and the toilet seat 2 and the cover 1 are prone to breeding viruses and bacteria in the airtight and humid environment.

[0052] Specifically, for a common toilet, the cleaning water pipe 12 can be directly connected in parallel to the flushing water pipe (valve), which is equivalent to dividing the flushing water into two parts. One part cleans the cover 1, the toilet seat 2, and the base 3 and then enters the toilet, and the other part flushes the inner wall of the toilet. The two parts of flushing water are finally discharged from the toilet together with the dirt. The usage process is as follows: After the user finishes using the toilet, cover the cover 1 of the toilet, press the flushing button, and the water from the water tank or the water supply pipe simultaneously cleans the cover 1, the toilet seat 2, the base 3, and the inner wall of the toilet and then discharges them from the toilet together with the dirt. After the sewage discharge is completed, open the cover 1 of the toilet to allow the cover 1, the toilet seat 2, and the base 3 to dry naturally as soon as possible.

[0053] For a smart toilet, since there is a power supply and a control system, the cleaning water can have a dedicated solenoid valve, and the cleaning process is controlled by switching the solenoid valve through the control system. The usage process for a smart toilet is as follows: After the control system detects that the user has finished using the toilet, it automatically covers the cover 1 of the toilet, and at the same time opens the solenoid valves of the cleaning water and the flushing water. After the cleaning water cleans the cover 1, the toilet seat 2, and the base 3, and the flushing water cleans the inner wall of the toilet, the cleaning water and the flushing water are discharged from the toilet together with the dirt; close the solenoid valves of the cleaning water and the flushing water, turn on the blower switch, and the air generated by the blower can pass through the cleaning water pipe 12 and the spray holes 13 on the toilet cover 1 to dry the cover 1, the toilet seat 2, and the base 3. After a few seconds, turn off the blower switch and open the cover 1 to keep the cover 1, the toilet seat 2, and the base 3 in a ventilated and dry state.

[0054] In addition, this application takes a smart toilet as an example to elaborate in detail the cleaning method of its toilet seat 2 and cover 1:

[0055] After the control system of the intelligent toilet seat detects that the user has left the toilet seat, it issues an instruction to make the lid 1 fall, and the second water retaining ring 11 of the lid 1 closes with the second water retaining ring 31 of the base 3. Subsequently, the solenoid valve for the cleaning water is opened, and the cleaning water is sprayed out from the flushing hole 13 through the cleaning water pipe 12 inside the lid 1 to clean the toilet seat 2 and the lid 1. The cleaning water near the inner side of the toilet seat 2 flows directly into the toilet after cleaning the toilet seat 2 and the lid 1. The cleaning water near the outer sides of the toilet seat 2 and the lid 1 enters the gap between the bottom surface of the toilet seat 2 and the base 3 through the side gap between the toilet seat 2 and the base 3 after cleaning the toilet seat 2 and the lid 1, and then flows into the toilet after cleaning the base 3. At the same time or after a delay of several seconds (2 - 6 seconds), the solenoid valve for the flushing water is opened, and the flushing water flushes the inner wall of the toilet and then, together with the cleaning water, the water seal water and the dirt, is flushed out of the toilet under the action of the flushing force (flush-down type) or siphon (siphon type). The solenoid valves for the flushing water and the cleaning water are closed sequentially or simultaneously, and the water remaining in the pipeline or on the surface gradually flows into the toilet to form the water seal water. Then, the blower inside the toilet seat lid is turned on to blow off and dry the water droplets on the toilet seat 2 and the lid 1, or the toilet seat 2 and the lid 1 are opened to make the toilet seat 2 and the lid 1 in an upright state, so that the water droplets on the toilet seat 2 and the lid 1 can fall off the toilet seat 2 and the lid 1 under the action of gravity. Finally, the blower is turned on again to dry the toilet seat 2 and the lid 1. After the toilet seat 2 and the lid 1 are dried, the toilet seat 2 falls (when mainly used by women), or the toilet seat 2 remains in an upright state all the time (when mainly used by men), and the lid 1 remains open all the time, which is beneficial to the ventilation and drying of the toilet seat 2 and the lid 1 as well as the base 3, and prevents bacteria and viruses from easily breeding in the airtight and humid environment of the toilet seat 2 and the lid 1.

[0056] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An auto - cleaning toilet seat and cover, Characterized in that: It includes a base, a toilet seat and a cover installed on the base; The base is installed on the toilet, and the toilet seat is located in a relatively enclosed space formed by the cover and the base; The base has a bottom surface matching the upper surface of the toilet and a first water - retaining ring formed by a flanging matching the outer edge of the toilet seat; The cover has a cleaning water pipe and spray holes for cleaning the toilet seat. The cleaning water sprays out from the spray holes through the cleaning water pipe, cleans the cover, toilet seat and base, and then flows into the toilet. When the cover is closed, the second water - retaining ring formed by its flanging cooperates with the first water - retaining ring of the base to form a closed structure to prevent the cleaning water from splashing outside the toilet.

2. The auto - cleaning toilet seat and cover according to claim 1, Characterized in that: The upper surface of the bottom surface of the base is distributed with the outer part higher and the inner part lower, which can make the cleaning water flow into the toilet as soon as possible.

3. The auto - cleaning toilet seat and cover according to claim 1, Characterized in that: The height of the first water - retaining ring formed by the flanging of the base is lower than the upper surface of the toilet seat, and the height of the first water - retaining ring is 5 - 15 mm, which can not only retain water but also avoid human touch.

4. The auto - cleaning toilet seat and cover according to claim 1, Characterized in that: The structure between the first water - retaining ring of the base and the second water - retaining ring of the cover is an interlocking structure, which has better performance in preventing the cleaning water from overflowing.

5. The auto - cleaning toilet seat and cover according to claim 1, Characterized in that: The base is bonded to the toilet with sealant and the joints are filled and smoothed with sealant.

6. The auto - cleaning toilet seat and cover according to claim 1, Characterized in that: There is a gap between the outer edge of the toilet seat and the first water - retaining ring of the base, and the width of the gap is 3 - 7 mm.

7. The auto - cleaning toilet seat and cover according to claim 1, Characterized in that: All surfaces in the space surrounded by the cover and the base are coated with a non - stick coating or an antibacterial coating.

8. The auto - cleaning toilet seat and cover according to claim 1, Characterized in that: The cover also has an air duct and air nozzles for drying the toilet seat and the base.

9. The auto - cleaning toilet seat and cover according to claim 1, Characterized in that: The cleaning water pipe can be integrated with the cover or can be set separately.

10. A cleaning method for the auto - cleaning toilet seat and cover for a smart toilet according to claim 1, Characterized in that It includes the following steps: 1). After the control system of the smart toilet detects that the user leaves the toilet, it issues an instruction to make the toilet cover drop, and the second water - retaining ring of the toilet cover closes with the first water - retaining ring of the base; 2). Open the solenoid valve of the cleaning water. The cleaning water sprays out from the spray holes through the cleaning water pipe in the toilet cover, cleans the toilet seat and the cover. The cleaning water near the inner side of the toilet seat flows directly into the toilet after cleaning the toilet seat and the cover. The cleaning water near the outer side of the toilet seat and the cover enters the gap between the bottom surface of the toilet seat and the base from the side gap between the toilet seat and the base after cleaning the toilet seat and the cover, cleans the base and then flows into the toilet. 3). At the same time or with a delay of several seconds (2 - 6 seconds), open the solenoid valve of the flushing water. After the flushing water flushes the inner wall of the toilet bowl, it, together with the cleaning water, the water seal water, and the dirt, is flushed out of the toilet bowl under the action of the flushing force (flush type) or siphon (siphon type); 4). Close the solenoid valves of the flushing water and the cleaning water sequentially or simultaneously. The water remaining in the pipeline or on the surface gradually flows into the toilet bowl to form the water seal water; 5). Turn on the blower inside the toilet seat cover to blow off and dry the water droplets on the seat ring and the cover; or open the seat ring and the cover to make them in an upright state so that the water droplets on the seat ring and the cover can fall off the seat ring and the cover by gravity, and finally turn on the blower to dry the seat ring and the cover; 6). After the seat ring and the cover are dried, the seat ring drops (when mainly used by women), or the seat ring remains in an upright state (when mainly used by men), and the toilet seat cover remains open, which is beneficial to the ventilation and drying of the seat ring, the cover, and the base, preventing bacteria and viruses from easily breeding in the airtight and humid environment of the seat ring and the cover.

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