UNIVERSAL SELF CLEANING SYSTEM FOR TOILETS AND METHODS THEREOF

Abstract

A self-cleaning toilet comprising a refillable container for storing liquid toilet cleanser in liquid communication with a toilet water tank. The toilet water tank receives water from a water supply system and toilet cleanser from the refillable container and has a float valve controlling water inflow and toilet cleanser inflow so that, the liquid level in the water tank being lower than a predetermined level, water and toilet cleanser flow into the water tank, mixing with the liquid in the water tank and, the liquid level being above a predetermined level, inflow of water and toilet cleanser is stopped. A dose regulator provides a predetermined flow rate of toilet cleanser. The incoming water having a predetermined water flow rate and the incoming toilet cleanser having a predetermined flow rate, a predetermined ratio of toilet cleanser to water is maintained in the water tank.

Claims

1. A self-cleaning toilet (200, 400) comprising a tank (70, 125) for containing liquids, said tank (70, 125) comprising: a refillable container (50, 124) in an upper portion of said tank (70, 125), said refillable container (50, 124) configured for storing toilet liquid cleanser and comprising a spout (45) with a stopper (40, 123) for refill of said toilet liquid cleanser; and in a lower portion of said tank (70, 125): a water supply inlet (21, 105); a dose regulator (20, 126) interconnected with said top compartment (50, 124), said dose regulator (20, 126) configured to provide a predetermined cleanser flow rate of said toilet liquid cleanser; a handle (30, 122) for flushing said self-cleaning toilet; a valve (110) interconnected to said handle (30, 122), configured to rise in accordance with a liquid level in said lower portion of said tank (70, 125) and reset said handle (30, 122) when reaching a predetermined maximum liquid level to enable the next flushing, said valve (110) further configured to control water inflow to said lower portion of said tank and toilet liquid cleanser inflow to said lower portion of said tank, said valve (110) enabling water inflow and inflow of toilet liquid cleanser when a liquid level in said lower portion of said tank (70, 125) is lower than a predetermined minimum level, so that said toilet liquid cleanser flows from said refillable container (50, 124) said lower portion of said tank (70, 125) and said water flows into said lower portion of said tank (70, 125), said toilet liquid cleanser and said water mixing with liquid in said lower portion of said tank (70, 125), said valve (110) stopping both said inflow of said toilet liquid cleanser and said water inflow when said liquid level in said lower portion of said tank (70, 125) reaches a predetermined maximum level; wherein said liquid in said lower portion of said tank (70, 125) comprises a predetermined ratio of said toilet liquid cleanser to said water, said inflow of said water having a predetermined water flow rate and said inflow of said toilet liquid cleanser having said predetermined cleanser flow rate, said predetermined ratio of said toilet liquid cleanser to said water is maintainable in said lower portion of said tank (70,125).

2. The self-cleaning toilet according to claim 1, wherein said tank (70, 125) is a hidden tank.

3. The self-cleaning toilet according to claim 1, wherein said valve (110) is selected from the group consisting of a bell valve or a float valve.

4. The self-cleaning toilet according to claim 1, wherein said toilet liquid cleanser comprises a deodorizer and a cleaning liquid.

5. The self-cleaning toilet according to claim 4, wherein said toilet liquid cleanser comprises a component selected from the group consisting of a bleach, a detergent, a disinfectant, a soap, a germicide, a fungicide, a viricide, a parasiticide or any combination thereof.

6. A method for use of a self-cleaning toilet (200, 400) comprising steps of: providing a self-cleaning toilet (200, 400) comprising a tank (70, 125) for containing liquids, said tank (70, 125) comprising: a refillable container (50, 124) in an upper portion of said tank (70, 125), said refillable container (50, 124) configured for storing toilet liquid cleanser and comprising a spout (45) with a stopper (40, 123) for refill of said toilet liquid cleanser; and in a lower portion of said tank (70, 125): a water supply inlet (21, 105); a dose regulator (20, 126) interconnected with said top compartment (50, 124), said dose regulator (20, 126) configured to provide a predetermined cleanser flow rate of said toilet liquid cleanser; a handle (30, 122) for flushing said self-cleaning toilet; a valve (110) interconnected to said handle (30, 122), configured to rise in accordance with a liquid level in said lower portion of said tank (70, 125) and reset said handle (30, 122) when reaching a predetermined maximum liquid level to enable the next flushing, said valve (110) further configured to control water inflow to said lower portion of said tank and toilet liquid cleanser inflow to said lower portion of said tank, said valve (110) enabling water inflow and inflow of toilet liquid cleanser when a liquid level in said lower portion of said tank (70, 125) is lower than a predetermined minimum level, so that said toilet liquid cleanser flows from said refillable container (50, 124) said lower portion of said tank (70, 125) and said water flows into said lower portion of said tank (70, 125), said toilet liquid cleanser and said water mixing with liquid in said lower portion of said tank (70, 125), said valve (110) stopping both said inflow of said toilet liquid cleanser and said water inflow when said liquid level in said lower portion of said tank (70, 125) reaches a predetermined maximum level; connecting said self-cleaning toilet (200, 400) to a water supply; providing toilet liquid cleanser in said refillable container (50, 124); and flushing said self-cleaning toilet (200, 400); thereby generating in said lower portion of said tank (70, 125) a predetermined ratio of said toilet liquid cleanser to said water, said inflow of said water having a predetermined water flow rate and said inflow of said toilet liquid cleanser having said predetermined cleanser flow rate, said predetermined ratio of said toilet liquid cleanser to said water is maintainable in said lower portion of said tank (70,125).

7. The method according to claim 6, additionally comprising a step of providing said tank (70, 125) as a hidden tank.

8. The method according to claim 6, additionally comprising a step of refilling said refillable container via said spout (45) and said stopper (40, 123).

9. method according to claim 6, additionally comprising a step of providing said toilet liquid cleanser comprising a deodorizer and a cleaning liquid.

10. The method according to claim 9, additionally comprising a step of selecting said toilet liquid cleanser from the group consisting of a bleach, a detergent, a disinfectant, a soap, a germicide, a fungicide, a viricide, a parasiticide or any combination thereof.

11. A self-cleaning toilet (100, 300) comprising: a refillable container (6, 101) for storing toilet liquid cleanser configured to receive toilet liquid cleanser via a spout with a stopper (7, 104); a water tank (4, 102) for containing liquids, said water tank (4, 102) configured to receive water from a water supply system via an inlet (10, 105); a pipe (2, 111) configured to connect said water tank (4, 102) and said refillable container (6, 101), said pipe (2, 111) being configured to allow said toilet liquid cleanser to flow from said refillable container (6, 101) to said water tank (4, 102); said water tank (4, 102) comprising: a valve (3, 110) disposed within said water tank (4, 102) for controlling water inflow to said water tank (4, 102) and toilet liquid cleanser inflow to said water tank (4, 102), said valve (3, 110) enabling water inflow and inflow of toilet liquid cleanser when a liquid level in said water tank (4, 102) is lower than a predetermined minimum level, so that said toilet liquid cleanser flows from said refillable container (6, 101) via said pipe (2,111) into said water tank (4, 102) and said water flows into said water tank (4, 102), said toilet liquid cleanser and said water mixing with the liquid in said water tank (4, 102), said valve (3, 110) stopping both said inflow of said toilet liquid cleanser and said water inflow when said liquid level in said water tank reaches a predetermined maximum level; and a dose regulator (1, 112) configured to provide a predetermined cleanser flow rate of said toilet liquid cleanser through said pipe (2,111); wherein said liquid in said water tank (4, 102) comprises a predetermined ratio of said toilet liquid cleanser to said water, said inflow of said water having a predetermined water flow rate and said inflow of said toilet liquid cleanser having said predetermined cleanser flow rate, said predetermined ratio of said toilet liquid cleanser to said water is maintainable in said water tank (4, 102).

12. The self-cleaning toilet according to claim 11, wherein said refillable container (6, 101) is refilled via said spout with said stopper (7, 104).

13. The self-cleaning toilet according to claim 11, wherein said refillable container (6, 101) is disposed either on top of said water tank (4, 102) or on a wall adjacent to said self-cleaning toilet (100, 300), in such way that a bottom of said refillable container (6, 101) is higher than a top of said water tank (4, 102).

14. The self-cleaning toilet according to claim 11, wherein said toilet liquid cleanser comprises a deodorizer and a cleaning liquid.

15. The self-cleaning toilet according to claim 14, wherein said toilet liquid cleanser is selected from the group consisting of a bleach, a detergent, a disinfectant, a soap, a germicide, a fungicide, a viricide, a parasiticide or any combination thereof.

16. The self-cleaning toilet according to claim 11, wherein said refillable container (6, 101) is transparent or has a transparent portion to enable observation of said toilet liquid cleanser's level.

17. A method for use of a self-cleaning toilet (100, 300) comprising steps of: providing a self-cleaning toilet (100, 300) comprising: a refillable container (6, 101) for storing toilet liquid cleanser configured to receive toilet liquid cleanser via a spout with a stopper (7, 104); a water tank (4, 102) for containing liquids, said water tank (4, 102) configured to receive water from a water supply system via an inlet (10, 105); a pipe (2, 111) configured to connect said water tank (4, 102) and said refillable container (6, 101), said pipe (2, 111) being configured to allow said toilet liquid cleanser to flow from said refillable container (6, 101) to said water tank (4, 102); said water tank (4, 102) comprising: a valve (3, 110) disposed within said water tank (4, 102) for controlling water inflow to said water tank (4, 102) and toilet liquid cleanser inflow to said water tank (4, 102), said valve (3, 110) enabling water inflow and inflow of toilet liquid cleanser when a liquid level in said water tank (4, 102) is lower than a predetermined minimum level, so that said toilet liquid cleanser flows from said refillable container (6, 101) via said pipe (2,111) into said water tank (4, 102) and said water flows into said water tank (4, 102), said toilet liquid cleanser and said water mixing with the liquid in said water tank (4, 102), said valve (3, 110) stopping both said inflow of said toilet liquid cleanser and said water inflow when said liquid level in said water tank reaches a predetermined maximum level; and a dose regulator (1, 112) configured to provide a predetermined cleanser flow rate of said toilet liquid cleanser through said pipe (2,111); providing toilet liquid cleanser in said refillable container (50, 124); providing toilet liquid cleanser in said refillable container (6, 101); and flushing said self-cleaning toilet (100, 300); thereby generating in said water tank (4, 102) a predetermined ratio of said toilet liquid cleanser to said water, said inflow of said water having a predetermined water flow rate and said inflow of said toilet liquid cleanser having said predetermined cleanser flow rate, said predetermined ratio of said toilet liquid cleanser to said water is maintainable in said lower portion of said tank (4,102).

18. The method according to claim 17, additionally comprising a step of refilling said refillable container (6, 101) via said spout with said stopper (7, 104).

19. The method according to claim 17, additionally comprising a step of disposing said refillable container (6, 101) either on top of said water tank (4, 102) or on a wall adjacent to said self-cleaning toilet (100, 300), in such way that a bottom of said refillable container (6, 101) is higher than a top of said water tank (4, 102).

20. The method according to claim 17, additionally comprising a step of providing said refillable container (6, 101) transparent or having a transparent portion to enable observation of said toilet liquid cleanser's level.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0073] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

[0074] These and other features, aspects, and advantages of the present invention are better understood when the following Detailed Description is read with reference to the accompanying drawings, wherein:

[0075] FIG. 1 depicts a schematic presentation the different elements of a self-cleaning toilet (100) for maintaining toilet hygiene of the present invention;

[0076] FIG. 2 depicts a schematic presentation of a side and inside view of the assembled different elements self-cleaning toilet (100) for maintaining toilet hygiene of the present invention;

[0077] FIG. 3 depicts a schematic presentation of a front view of the self-cleaning toilet (100) and an enlarged presentation of a dose regulator (1) of a self-cleaning toilet for maintaining toilet hygiene of the present invention;

[0078] FIG. 4A depicts a schematic presentation of a side view of a top compartment (6) and a bottom compartment (4) of a self-cleaning toilet for maintaining toilet hygiene of the present invention;

[0079] FIG. 4B depicts a schematic presentation of a top view of a self-cleaning toilet for maintaining toilet hygiene (100) and the top compartment (6) of the present invention;

[0080] FIG. 5A depicts a schematic presentation of the different separated elements of a hidable self-cleaning toilet for maintaining toilet hygiene of the present invention;

[0081] FIG. 5B depicts a schematic presentation the assembled different elements of a hidable self-cleaning toilet for maintaining toilet hygiene (200) of the present invention;

[0082] FIG. 6A depicts a schematic presentation of a front view of the hidable self-cleaning toilet (200);

[0083] FIG. 6B depicts an enlarged presentation of the connection of a cleanser dose regulator (20) and a top compartment (50) of the hidable self-cleaning toilet (200) for maintaining toilet hygiene of the present invention;

[0084] FIG. 6C depicts a schematic presentation of a front side of the hidable self-cleaning toilet (200) the bottom compartment (70) with valve (110), handle (30) and the top compartment (50) of a self-cleaning toilet for maintaining toilet hygiene of the present invention;

[0085] FIGS. 7A-D and 8 depict another embodiment of a self-cleaning toilet (300); and

[0086] FIG. 9A-C depict another embodiment of a concealed self-cleaning toilet (400).

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0087] The following description is provided, alongside all chapters of the present invention, so as to enable any person skilled in the art to make use of the invention and sets forth the best modes contemplated by the inventor of carrying out this invention. Various modifications, however, are adapted to remain apparent to those skilled in the art, since the generic principles of the present invention have been defined specifically to provide devices and methods for maintaining toilet hygiene and thus reducing toilet contamination of the bowl and bowl water, or other surfaces affected by the toilet flushing related aerosol.

[0088] As used herein after, the term float valve refers to a mechanical liquid level controller. A float detects changes of elevation in the liquid free surface and opens or closes a valve accordingly. Generally, large numbers of small float valves are used in domestic water systems, more particularly a small float valve is fitted to toilet cisterns to measure the flush water. Usually, toilet float valves close on a rising liquid level and is mounted on the toilet cistern side above the liquid level to allow maintenance without draining the tank. The float valve is also known as a ball valve or a ballcock

[0089] As used herein after, the term flush toilet refers to a toilet that disposes of human waste (urine, feces, vomit, etc.) by using water to flush it through a drainpipe to another location for disposal, thus maintaining a separation between humans and their waste. Flush toilets are a plumbing fixture and usually incorporate some form of a bend called a trap that causes water to collect in the toilet bowl to hold the waste and act as a seal against noxious sewer gases. Most flush toilets are connected to a sewerage system or to other forms of drainage systems.

[0090] As used herein after, the term flush or flushing refers to a sudden flow of liquids from a toilet cistern or water tank to the toilet bowl after which the toilet bowl contents empty and the bowl and cistern fills with water again. Further it may refer to the activation of such a flow of liquids and subsequent emptying and refilling the toilet bowl and cistern/water tank, usually by pressing a button (called a flush button), by pulling a string attached to a lever. Nowadays, there are automatic flush systems configured to detect the use of a toilet and automatically activate the toilet flushing mechanism.

[0091] As used herein after, the term bell valve refers to a float-cup fill valve and is a more modern style of anti-siphon fill valve, originally introduced in the late 1950's by Fluidmaster? and mainly made of plastic. The bell valve is identified by a plastic floating O-shaped cup that moves up and down around the bell valve shaft. The floating cup is attached using a metal spring clipped to a metal actuating rod. Water level in the tank is controlled by adjusting where the actuating rod connects to the float cup.

[0092] As used herein after, the term WC (Water Closet) type toilet refers to a variety of flush toilets, usually connected to a sewer system, septic tanks or other drainage solutions or treatment device. A bowl, a water tank/a cistern and a fill valve, some of which have a pedestal and a seat.

[0093] As used herein after, the term European WC (EWC) type toilet is a type of a flush toilet with a toilet a pedestal and a seat set up for use in a western/European sitting position as opposed to a squatting position.

[0094] As used herein after, the term Anglo-Indian type toilet refers to a type of flush toilet that allow users to choose between a western/European sitting position and a squatting position. Basically, it is a European style sitting commode that have extra-wide rims, flared out on either side, to allow the user to clamber up and squat if they wish.

[0095] As used herein after, the term squat type toilet refers to a flush toilet arranged at floor level, which requires the individual to squat with bent knees. In contrast to a pedestal or a sitting toilet, the opening of the drain pipe is located at the ground level. The squat toilet is also known as Asian type toilet or Japanese type toilet

[0096] As used herein after, the term bleaches refers to chemicals that are used as disinfectant because of their anti-microbicidal properties. Another common trait of bleaches which does not reflect in the current invention is their ability to remove, whiten or lighten the natural color of textile or paper Chlorine, sodium hypochlorite, calcium hypochlorite, and hydrogen peroxide are commonly used as bleaches. Bleaches usually exert their chemical activity via oxidation, excluding a few reduction agent bleaches.

[0097] As used herein after, the term detergents refers to surfactants or mixtures of surfactants that has cleaning properties in dilute solution with water. A detergent is similar to soap, but with a general structure RSO4-, Na+, where R is a long-chain alkyl group. detergents are amphiphilic, meaning they have both hydrophobic and hydrophilic regions. Most detergents are akylbenzenefulfonates. Detergent are similar to soap but are more soluble in hard water.

[0098] As used herein after, the term disinfectants refers to chemical agents applied to non-living objects and designed to destroy bacteria, viruses, fungi, mold or mildews living on the objects. Different disinfectants may utilize a different active ingredient formula, this active ingredient is what kills pathogens, usually by disrupting or damaging their cells. Active ingredients are usually aided by other ingredients with various purposes. For example, surfactants can be added to a disinfectant formula. Some of the disinfectant struggle to destroy persistent microbial spores.

[0099] As used herein after, the term germicides refers to a wide range of chemical agent that kills all type of germs; viruses, fungi, bacteria, parasites, spores and even parasites' eggs (such as Ascaris, tapeworms, etc).

[0100] The present invention provides self-cleaning toilet and methods for maintaining toilet hygiene and fresh odor both in private residence and in public places which requires only little attention and resources, in other words, an occasional refill of toilet liquid cleanser.

[0101] It is of extreme importance to state that the present invention discloses devices and methods where the water from the water supply system and toilet liquid cleanser are premixed to a unified mixture and stored as a mixture before flushing, therefore, it is the mixture that fills the toilet bowl. Upon defecation and/or urination the feces and urine mix immediately with the toilet liquid cleanser and water mixture, the toilet liquid cleanser at the same instant commence the process of disinfecting, and deodorizing the feces and/or urine, thus by the time toilet user flushes the toilet, the feces and urine related contamination levels and the unpleasant odor are reduced substantially. Flushing causes the stored mixture to flow into the toilet bowl mix with all (feces/urine and the bowl mixture of water and toilet liquid cleanser) augmenting the process of disinfecting, and deodorizing the feces and/or urine. This initial step of disinfecting further augmented upon flushing is crucial in reducing the levels of above-mentioned contaminated aerosol, plume and droplets and surface contamination levels as a direct result. Subsequent to flushing and mixing of the toilet bowl content with the stored mixture, the content of the bowl is cleared into the sewer and the toilet bowl is refilled with a new mixture of water and toilet liquid cleanser, which assist in reducing persistent contamination and bio-film formation, therefore increasing toilet hygiene and fresh odor.

[0102] In some embodiments of the present invention the self-cleaning toilet is provided with a separate/stand-alone container for toilet liquid cleanser that can be mounted on top of the toilet water tank or on a wall adjacent to the toilet water tank and higher than the water tank. The toiles liquid cleanser container and the toilet water tank are connected via a connecting pipe disposed on the outside of the toilet liquid cleanser container and the toilet water tank.

[0103] In some embodiments of the present invention the self-cleaning toilet, configured for use with a hidden tank but not limited thereunto, the self-cleaning toilet is provided with one container which is divided into a top compartment for the toilet liquid cleanser and a bottom compartment for water and toilet liquid cleanser mixture.

[0104] In some embodiment of the present invention the self-cleaning toilet is a urinal.

[0105] Some advantages of the present system comprise: [0106] Some embodiments can be used with toilets with concealed water tanks, while others can be used with toilets with external water tanks. In either case, the cleanser tank sits on top of the water tank. [0107] For all embodiments, the cleanser tank can be filled from its outside so no disassembly is needed, either of the cleanser tank or the water tank, in order to refill the cleanser tank. Prior art mechanisms require some disassembly; at a minimum, removal of the water tank lid. [0108] The amount of cleanser added to the water tank with each flush is adjustable, and the adjustment is made from outside the water tank. In addition, there is no need to empty the water tank either before or after the adjustment. [0109] The cleanser tank is large so that it does not need frequent refilling. This is unlike the prior art mechanisms, which have small cleanser containers and would require frequent refilling. As the prior art mechanisms sit within the water tank, the cleanser containers cannot be large, as this would limit the amount of water in the tank. [0110] The disinfectant mixes with the water in the water tank, rather than in the toilet bowl, ensuring that both the water tank and the water in the toilet bowl are kept clean. This is unlike the prior art, where the cleanser mixes with the water in the toilet bowl, thus failing to provide cleansing for the water tank. [0111] The system is robust, simple to install, and easy to operate. This is unlike the prior art, which have complex mechanisms.

[0112] Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

EXAMPLES

[0113] As above mentioned, although essential for keeping the environment and water sources clean and healthy by using toilets and proper drainage, with any visit to a public or a household toilet lies a risk of infection, either by direct contact with the toilet or surrounding surfaces or by inhalation of toilet water derived aerosol. Flushing, on the one hand, reduces the numbers of microorganisms in the toilet bowl water. However, still a large number of microorganisms persist on the toilet bowl, seat, lid and in the toilet bowl water. In addition, flushing produces an aerosol of droplets, spreading the contamination on surfaces surrounding the toilet and increasing the air-borne risk of inhaling the contaminated aerosol. Furthermore, toilet odor can be unpleasant and repelling; this may lead people in need of a toilet to reconsider or even hold back from relieving themselves until reaching a more pleasant option odor-wise, which may take a long while. The present invention discloses a self-cleaning toilet that provides a mixture of toilet liquid cleanser and water. The mixture is mixed in a compartment of the self-cleaning toilet and is ready to be flushed into the toilet bowl. The same cleansing mixture constitutes the liquid that fills the toilet bowl before using the toilet and into which feces and urine are deposited. Upon defecation and/or urination, the cleansing mixture of toilet liquid cleanser and water instantly starts to disinfect and deodorize the urine and/or feces, therefore, by the time the toilet is flushed the contamination risk is reduced substantially and so is the bad odor. Flushing will cause the partially disinfected and deodorized urine and/or feces to undergo a second wave of disinfection and deodorizing by the cleansing mixture flushed into the bowl, further reducing the risk of contaminated aerosol and derived inhalation or contact. The cleansing mixture in the toilet bowl also substantially reduces the number of persistent microorganisms in the surroundings of the bowl and the toilet surfaces that are usually detected in the absence of a premixed mixture of toilet liquid cleanser and water, which the self-cleaning toilet of the present invention provides.

Example 1

[0114] Reference in now made to FIG. 1 depicting a schematic presentation the elements of a self-cleaning toilet (100) and FIG. 2 depicting a schematic presentation of a sectional view of the assembled different elements self-cleaning toilet (100). A refillable container (6) for toilet liquid cleanser has a spout (17) and stopper (7) through which toilet liquid cleanser is refilled. The refillable container (6) is mounted on top of the lid (5) of a water tank (4) and connected to it by pipe (2) through which toilet liquid cleanser can flow from the refillable container (6) and mix with the water in the toilet water tank (4). The toilet water tank (4) is further connected to the water supply system through inlet (10). A float valve (3), or another conventional valve of the same type, such as, but not limited to a bell valve, is disposed within the water tank (4). When the liquid in the water tank (4) reaches a predetermined maximum level, the valve (3) blocks the inlet (10), thereby blocking the inflow of water from the water supply system. The valve (3) also blocks the outlet from the dose regulator (1), thereby blocking flow of toilet liquid cleanser into the water tank (4). When the liquid in the water tank (4) reaches a predetermined minimum level (e.g., after flushing) the valve (3) opens the inlet (10) and allows the inflow of water to the water tank (4) and also opens the outlet from the dose regulator (1), allowing toilet liquid cleanser to mix with the inlet water.

[0115] Dose regulator (1) regulates the flow of toilet liquid cleanser from the refillable container into the water tank (4) so that the mixture of water from the water supply system and toilet liquid cleanser that reaches the toilet tank has a predetermined ratio of toilet liquid cleanser to water. The dose regulator (1), as is known in the art, is configured to provide a constant flow rate of the toilet liquid cleanser passing through it. Since the water pressure at the water inlet (10) is constant and since the flow of water and the flow of toilet liquid cleanser start and stop at the same time, there is a constant ratio between water and toilet liquid cleanser entering the toilet water tank (4). Upon installation, or if there is a significant change in the water pressure at the inlet (10), the flow rate of cleanser passing through the dose regulator (1) is adjusted until the desired ratio of water to toilet liquid cleanser enters the water tank (4).

[0116] Upon flushing, the mixture of water and toilet liquid cleanser flow from water tank (4) through outlet (11) to the toilet bowl (not shown). Reference in now made to FIG. 3 depicting a schematic presentation of a front view of the self-cleaning toilet (100) and an enlarged presentation of a dose regulator (1) connected to the pipe (2) through which the toilet liquid cleanser can flow from the refillable container (6) through the dose regulator (1) to the water tank (4), mixing in the water tank with the water from the water supply system to reach a mixture with a predetermined ratio of toilet liquid cleanser to water.

[0117] Reference in now made to FIG. 4a depicting a side view of a top compartment (6) and a bottom compartment (4) and water inlet (10) for water from the water supply system and outlet (11) for, during flushing, the clearance of the mixture of water and toilet liquid cleanser from water tank (4) to the WC bowl. Reference in now made to FIG. 4b depicting a schematic presentation of a top view of a self-cleaning toilet with water inlet (10) for water from the water supply system and pipe (2) through which toilet liquid cleanser flow from refillable container (6) to water tank (4) according to the dose regulator (1) (not shown in this figure).

Example 2

[0118] FIG. 5a depicting a schematic presentation of the different elements and FIG. 5b depicting the assembled different elements of a hidable self-cleaning toilet (200) for maintaining toilet hygiene of the present invention, where the toilet tank can be hidden behind a wall. This preferred embodiment can be, but not in a limiting manner, incorporated into a wall or an architectural structure hidden from the naked eye, while only the handle or flush plate (30) for flushing and the WC bowl and waste pipe (90) for the clearance of the bowl content to the drainage system are visible. Top compartment (50), the refillable container, is mounted on top of bottom compartment (70), the water tank, with base (150) holding top compartment (50) in place and preventing it from collapsing into bottom compartment (70). Toilet liquid cleanser is filled and/or refilled into top compartment (50). Dose regulator (20) is disposed in bottom compartment (70) and configured to control the flow of the toilet liquid cleanser from the top compartment (50) into the bottom compartment (70), allowing water from the water supply system and toilet liquid cleanser to mix into a mixture with a predetermined ratio of toilet liquid cleanser to water. The dose regulator (20) comprises a valve (110), which is a bell valve in the embodiment shown, with a water pipe in fluid communication with the valve (110). The water pipe comprises a fresh water inlet (21) connectable to a water supply and an outlet (22) inside the bottom compartment (70) allowing the mixed water and cleanser to enter the bottom compartment (70). A gasket (10) prevents leakage around the entry point of the water inlet pipe (21) into the bottom compartment (70).

[0119] The base (80), connected to a vertical support such as a wall, holds the top (50) and bottom (70) compartments in position.

[0120] Reference is now made to FIG. 6a depicting a schematic presentation of a front view of the self-cleaning toilet (200). FIG. 6b shows an enlarged presentation of the area within the circle A-A, showing the dose regulator (20) and valve (110) within the bottom compartment (50).

[0121] Reference is now made to FIG. 6c depicting a schematic presentation of a side view of the self-cleaning toilet (200) along the line B-B of FIG. 6a. Shown are the bottom compartment (70) with valve (110), a bell valve in the embodiment shown, handle or flush plate (30), and the top compartment (50). Flushing starts by operating handle or flush plate (30) which lifts the bell valve (110) to allow clearance (not shown in the figure) of bottom compartment (70). Subsequent to the clearance of bottom compartment (70) content to the WC bowl, bell valve (110) blocks the outlet between bottom compartment (70) and the bowl, and water from the water supply system flow into the bottom compartment (70), simultaneously, toilet liquid cleanser is allowed to flow from the top compartment (50) to the bottom compartment (70) at the constant flow rate controlled by the dose regulator (20) to obtain a mixture, as defined above, with a predetermined ratio of toilet liquid cleanser to water. A stopper (40) is seen on the lid (60) of the top compartment (50). The stopper closes a spout in the lid (45) through which the top compartment (50) can be filled or refilled with cleanser. A waste pipe (90) configured to allow emptying of the toilet bowl (not shown) is also shown.

Example 3

[0122] FIGS. 7a-d and 8 depict another embodiment of the self-cleansing toilet (300). FIG. 7a-b depicts, respectively, a front view and a side view of this embodiment of the self-cleansing toilet (300). FIG. 7c depicts a perspective view, and FIG. 7d depicts an enlarged view of the area inside the circle A, showing a cutaway view of the mixing volume (108), with the ends of the pipes and the top of the valve (115) visible.

[0123] FIG. 8 depicts an embodiment of the toilet liquid cleanser container and the associated tubing that connects the toilet liquid cleanser container with the toilet water tank.

[0124] In FIGS. 7a-d and 8, a refillable container (101) for toilet liquid cleanser has an opening (not shown) covered by a stopper (104) in its top surface through which toilet liquid cleanser can be poured to refill the refillable container (101). In some embodiments, the opening comprises a spout to make filling easier. The refillable container (101) is mounted on top of the lid (109) of a water tank (102) and connected to it by a cleanser pipe (111) comprising a dose regulator (112) through which toilet liquid cleanser can flow from the refillable container (101). A nipple (103, FIG. 8) ensures a liquid-tight connection between the refillable container (101) and the cleanser pipe (111). The toilet water tank (102) is further connectable to the water supply system through a water line (105) comprising a water tap (106). The cleanser pipe (111) and water line (105) both empty into a mixing volume (108). The toilet water tank (102) drains into a toilet bowl (not shown) via a clean water pipe (118).

[0125] A valve (115) (a float valve is shown; other conventional valves can be used) is disposed within the water tank (102). When the liquid in the water tank (102) reaches a predetermined maximum level, the valve (115) blocks exit of liquid from the mixing volume (108).

[0126] When the discharge handle or flush plate (107) is depressed, the valve (115) drops, allowing the mixed water and toilet liquid cleanser to exit the mixing volume (108). As the mixed water and toilet liquid cleanser flows into the water tank (102), water flows into the mixing volume (108) from the water line (105) and toilet liquid cleanser flows into the mixing volume (108) from the cleanser pipe (111). The flow rate of the water is controlled by the system water pressure and the flow rate of the toilet liquid cleanser is controlled by the dose regulator (112). Flow of water and of toilet liquid cleanser will be stopped simultaneously by the float (115) or other closure mechanism when the float (115) has risen to a predetermined maximum level.

[0127] It should be noted that the bottom face of the refillable container (101) is not horizontal. The bottom face slopes downward towards the cleanser pipe (111) so that the lowest portion of the refillable container (101) is the portion where the cleanser pipe (111) is attached to the refillable container (101). This increases the efficiency of the system, as it minimizes the amount of toilet liquid cleanser remaining in the refillable container (101) when the refillable container (101) ceases to work because it is empty, thereby increasing the efficiency of the system.

[0128] FIG. 7d shows an enlarged view of the area inside circle A, showing the fluid connection between the water line (105) with water tap (106), the dose regulator (112) and the top of the valve (115).

[0129] FIG. 8 shows a perspective view from underneath of the refillable container (101), the water line (105), the mixing volume (108) and the valve (115).

Example 4

[0130] FIG. 9A-C depicts, respectively, a front view, a side view and a perspective view of an embodiment of a hidable self-cleansing toilet (400), where the tank can be hidden behind a wall, with a refillable container (124) inside the water tank (125).

[0131] In FIG. 9A-C, inside the water tank (125) there is a refillable container (124) for toilet liquid cleanser with a spout (45) in its top surface that extends through the lid of the water tank (125). Toilet liquid cleanser can be poured through this opening to refill the refillable container (124). Normally, the spout (45) is closed by a stopper (123, FIG. 9c).

[0132] In some embodiments, the top surface of the tank (125) is also the top of the refillable container (124).

[0133] The refillable container (124) is connected to the mixing volume (121) via a dose regulator (126). A water line (105) comprising a water tap (128) is also connected to the mixing volume (121). The mixing volume (121) empties into the water tank (125) via an opening (129) in an exit pipe. The waste drains from the toilet bowl (not shown) via a waste pipe (127).

[0134] A valve (110), which is typically a float valve or bell valve but can be any conventional valve that opens/closes when water is at a predetermined height. is disposed within the water tank (125). When the liquid in the water tank (125) reaches a predetermined maximum level, the valve (110) blocks exit of liquid from the mixing volume (121).

[0135] When the handle or flush plate (122) is pressed, the valve (110) opens, allowing the mixed water and toilet liquid cleanser to exit the mixing volume (121). As the mixed water and toilet liquid cleanser flows into the water tank (125), water flows into the mixing volume (121) from the water line (105) and toilet liquid cleanser flows into the mixing volume (121) from the cleanser pipe via the dose regulator (126). The flow rate of the water is controlled by the system water pressure and the flow rate of the toilet liquid cleanser is controlled by the dose regulator (126). Flow of water and of toilet liquid cleanser will be stopped simultaneously by the valve (110) when the valve (110) has risen to a predetermined maximum level.

[0136] It should be noted that the bottom face of the refillable container (124) is not horizontal. The bottom face slopes downward towards the end of the refillable container (124) with the dose regulator (126) so that the lowest portion of the refillable container (124) is the portion where the dose regulator (126) is attached to the refillable container (124). This increases the efficiency of the system, as it minimizes the amount of toilet liquid cleanser remaining in the refillable container (124) when the refillable container (124) ceases to work because it is empty, thereby increasing the efficiency of the system.

[0137] The invention is not intended to be limited to the embodiment illustrated and described above, but it can be modified and varied within the scope and spirit of the invention as defined by the following claims.