Self-cleaning urinal

Abstract

The application discloses a self-cleaning urinal, and belongs to the field of sanitary equipment, which comprises a urinal, a cleaning structure assembly, a total water inlet pipe, a water outlet system, a foam outlet system and a control circuit board. The shell of the cleaning structure assembly is fixed to the wall surface of the urinal, and the shell is internally provided with a foam outlet chamber and a water outlet chamber which are independent of each other and are respectively provided with a foam outlet and a water outlet. The total water inlet pipe is used for connecting an external water source. The water outlet system comprises a first electromagnetic valve which is installed between the total water inlet pipe and the water outlet chamber. The foam outlet system comprises a foam storage cavity, a soap bottle, a foam pump and a second electromagnetic valve. The foam pump is connected between the soap bottle and the foam storage cavity, the second electromagnetic valve is installed between the total water inlet pipe and the foam storage cavity, and the liquid outlet of the foam storage cavity is connected to the foam outlet chamber. The control circuit board is electrically connected with the first electromagnetic valve, the second electromagnetic valve and the foam pump. The self-cleaning urinal realizes a step-by-step self-cleaning mode of outputting foam for pre-cleaning and then outputting clean water for flushing through the independent foam channel and water channel, and has the advantages of compact structure and good cleaning effect.

Description

Technical Field

[0001] This invention relates to the field of sanitary ware, specifically to a self-cleaning urinal. Background Technology

[0002] Public urinals are currently cleaned using either timed flushing or infrared sensor flushing. Timed flushing cannot be adjusted flexibly according to actual usage, resulting in incomplete cleaning during peak hours and lingering odors, while frequent flushing when not in use leads to significant water waste. Infrared sensor flushing, although it automatically rinses after the user leaves, is limited to ordinary water rinsing and has limited ability to remove stubborn stains such as urine and grease adhering to the ceramic surface. Over time, yellow stains and odors will gradually form on the inner wall of the urinal, requiring regular manual cleaning, which is costly, especially in high-traffic public places such as airports, shopping malls, and train stations.

[0003] Some existing technologies attempt to introduce soap or foam cleaning functions into urinals. One approach involves adding soap to the water flow while flushing, creating soapy water to rinse the urinal. The main drawback of this approach is that the soap is immediately rinsed away after mixing with water, and the foam or soap remains on the ceramic surface for a very short time, failing to fully utilize the soap's wetting, softening, and dissolving effects on dirt, resulting in limited cleaning effectiveness. Another approach involves installing a foaming device inside the urinal to spray foam directly onto the ceramic surface. However, this approach often uses a single chamber to simultaneously output water and foam, or installs the foam generator directly inside the urinal, resulting in insufficient independence between foam and water switching. This can easily lead to foam residue clogging the water channels or incomplete rinsing, causing the foam to dry and become even more difficult to clean. Furthermore, existing foam cleaning solutions generally suffer from short foam adhesion time and the formation of new stains after the foam dries, which actually increases the cleaning difficulty.

[0004] Currently, there is a lack of urinal products on the market that completely separate foam pre-cleaning and water rinsing in terms of structure and timing. This makes it impossible to achieve a step-by-step cleaning process where foam is first applied to the ceramic surface and allowed to adhere fully, followed by rinsing with water after the foam dissolves the dirt. To address this technological gap, this invention aims to provide a self-cleaning urinal with independent foam and water chambers. These chambers respectively output foam and rinsing water to the ceramic surface of the urinal, forming an independent dual-system operating mode. This enables an automated cleaning process where foam fully dissolves dirt before rinsing with water, significantly reducing the frequency of manual maintenance and improving the user experience in public restrooms. Summary of the Invention

[0005] This invention provides a self-cleaning urinal that automates the cleaning process by fully dissolving dirt with foam and then rinsing with clean water, significantly reducing the frequency of manual maintenance and improving the user experience of public restrooms.

[0006] To achieve these objectives and other advantages of the present invention, a self-cleaning urinal is provided, comprising: a urinal; a cleaning structure assembly including a housing fixed to the wall of the urinal, the housing having an independent foam outlet chamber and a water outlet chamber, the foam outlet chamber having a foam outlet and the water outlet chamber having a water outlet, the foam outlet and the water outlet being located on the outer side of the urinal wall; a main water inlet pipe for connecting to an external water source; a water outlet system including a first solenoid valve installed on the connecting pipe between the main water inlet pipe and the water outlet chamber; a foam outlet system including a foam storage chamber, a soap bottle, a foam pump, and a second solenoid valve, the inlet and outlet of the foam pump being connected to the soap bottle and the foam storage chamber respectively, the second solenoid valve being installed on the connecting pipe between the main water inlet pipe and the foam storage chamber, the outlet of the foam storage chamber being connected to the foam outlet chamber; a control circuit board electrically connected to the first solenoid valve, the second solenoid valve, and the foam pump; and a power supply electrically connected to the control circuit board.

[0007] Preferably, the foam dispensing system further includes an air pump and a pressure sensing module. The outlet of the air pump is connected to the foam storage chamber via a pipeline. The pressure sensing module is connected in series in the pipeline between the foam storage chamber and the foam dispensing chamber. The pressure sensing module is used to release pressure when the pressure inside the foam storage chamber reaches a threshold. The control circuit board is electrically connected to the air pump.

[0008] Preferably, the water outlet system further includes an ozone generator and a venturi tube, wherein the venturi tube is connected in series in the pipeline between the first solenoid valve and the water outlet chamber, and the outlet of the ozone generator is connected to the inlet of the venturi tube.

[0009] Preferably, the water outlet is located above the foam outlet, and the end of the foam outlet is smoothly connected to the wall of the urinal.

[0010] Preferably, it also includes a buzzer, which is electrically connected to the control circuit board.

[0011] Preferably, it further includes a wireless control module for communicating with a wireless control terminal, the wireless control module being electrically connected to the control circuit board.

[0012] Preferably, it also includes a first one-way valve, which is connected in series in the pipeline between the second solenoid valve and the foam storage chamber, and the flow direction of the first one-way valve is towards the foam storage chamber.

[0013] Preferably, it also includes a second one-way valve, which is connected in series in the pipeline between the air pump and the foam storage chamber, and the flow direction of the second one-way valve is towards the foam storage chamber.

[0014] Preferably, both the water outlet and the foam outlet are arranged downwards, the water outlet is a strip-shaped hole, and the inner wall of the water outlet and / or the foam outlet is provided with a chamfer that slopes towards the wall of the urinal.

[0015] Preferably, it also includes a sensor, which is mounted on the urinal and electrically connected to the control circuit board.

[0016] The present invention has at least the following beneficial effects: First, by setting up a cleaning structure assembly, the present invention has an independent foam outlet chamber and a water outlet chamber inside the housing, so that the foam output and water output are completely separated in physical structure. This avoids the problem of foam residue clogging the water passage or the water passage diluting the foam. At the same time, it also facilitates the foam to fully adhere to and remain on the ceramic surface. After the foam has completed the dissolution of dirt, it is rinsed with clean water. This realizes a step-by-step cleaning mode of foam pre-cleaning followed by clean water rinsing, which improves the cleaning effect.

[0017] Secondly, the present invention adopts an independent water outlet system and a foam outlet system. The water outlet system is controlled by a control circuit board to control the first solenoid valve to realize the opening and closing of the water circuit, and the foam outlet system is controlled by a control circuit board to control the second solenoid valve and the foam pump to realize the extraction and mixing of soap solution. The two systems do not interfere with each other, and the timing and duration of water outlet and foam outlet can be controlled separately according to actual needs. The structure is compact, the control is reliable, and the manufacturing and maintenance costs are reduced.

[0018] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the urinal in one technical solution of the present invention; Figure 2 This is a bottom view of the cleaning structure assembly in one technical solution of the present invention; Figure 3 This is a cross-sectional view of the cleaning structure assembly in one technical solution of the present invention; Figure 4 This is a schematic diagram of a Wen's tube according to one technical solution of the present invention; Figure 5 This is a schematic diagram of the overall system in one technical solution of the present invention.

[0020] Reference numerals: 1-urinal, 2-cleaning structure assembly, 20-shell, 21-foam outlet chamber, 210-foam outlet, 22-water outlet chamber, 221-water outlet, 23-foam inlet pipe, 24-water inlet pipe, 3-control circuit board, 30-power supply, 4-main water inlet pipe, 5-first solenoid valve, 51-venturi tube, 52-ozone generator, 6-second solenoid valve, 60-first check valve, 61-soap bottle, 62-foam pump, 63-air pump, 631-second check valve, 64-foam storage chamber, 640-pressure sensing module, 7-wireless control module, 70-wireless control terminal, 8-buzzer, 9-sensor. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0022] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the components described are commercially available unless otherwise specified. In the description of this invention, it should be noted that, unless otherwise explicitly stated and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] like Figure 1-5As shown, the technical solution of this application provides a self-cleaning urinal, including: a urinal 1; a cleaning structure assembly 2, including a housing 20 fixed to the wall of the urinal 1, the housing 20 having an independent foam outlet chamber 21 and a water outlet chamber 22, the foam outlet chamber 21 having a foam outlet 210, and the water outlet chamber 22 having a water outlet 221, the foam outlet 210 and the water outlet 221 being located on the outer side of the wall of the urinal 1; a main water inlet pipe 4 for connecting to an external water source; and a water outlet system including a first solenoid valve 5, the first solenoid valve 5 being installed on the main water inlet pipe 4. The system includes a foaming system, comprising a foam storage chamber 64, a soap bottle 61, a foam pump 62, and a second solenoid valve 6. The inlet and outlet of the foam pump 62 are connected to the soap bottle 61 and the foam storage chamber 64, respectively. The second solenoid valve 6 is installed on the connecting pipe between the main water inlet pipe 4 and the foam storage chamber 64. The outlet of the foam storage chamber 64 is connected to the foaming chamber 21. A control circuit board 3 is electrically connected to the first solenoid valve 5, the second solenoid valve 6, and the foam pump 62. A power supply 30 is electrically connected to the control circuit board 3.

[0025] The urinal 1 is made of ceramic material through high-pressure injection molding and sintering. Its back has an inwardly recessed installation space to accommodate the cleaning structure assembly 2 and other related components. The housing 20 of the cleaning structure assembly 2 can be injection molded from ABS engineering plastic. The housing 20 is box-shaped and can be fixed to the pre-drilled screw holes on the back of the urinal 1 using multiple stainless steel self-tapping screws, or it can be detachably connected by a snap-fit ​​mechanism with a pre-set slot on the back of the urinal 1. To ensure a tight seal, a sealing gasket can be added between the housing 20 and the wall of the urinal 1, or sealant can be applied to the joint. The interior of the housing 20 is divided into two independent, non-communicating chambers: a foam outlet chamber 21 and a water outlet chamber 22, preventing interference between the foam and water flow before output. The housing 20 also has an integrally formed water inlet pipe 24 and a foam inlet pipe 23. One end of the water inlet pipe 24 connects to the water outlet chamber 22, and one end of the foam inlet pipe 23 connects to the foam outlet chamber 21. The outlet of the foam chamber 21 has several foam outlets 210 integrally formed at its outlet, and the outlet of the water chamber 22 has a water outlet 221 integrally formed at its outlet. The foam outlets 210 and water outlets 221 are located on the outer side of the wall of the urinal 1, and their opening direction is slightly inclined downward so that the foam and water can flow smoothly to the inner wall surface of the urinal 1. The foam outlets 210 and water outlets 221 can be circular, flat, or strip-shaped holes.

[0026] The main inlet pipe 4 uses a PVC flexible hose or nylon pipe. One end connects to the pre-embedded water pipe in the building wall via a quick connector, and the other end branches into two paths via a tee connector: one path connects to the inlet of the first solenoid valve 5 of the outlet system, and the other path connects to the inlet of the second solenoid valve 6 of the foam outlet system. Both the first solenoid valve 5 and the second solenoid valve 6 are normally closed two-position two-way direct-acting solenoid valves, with valve bodies made of brass or engineering plastics, and internal seals made of nitrile rubber or EPDM rubber. The outlet of the first solenoid valve 5 is connected to the inlet pipe 24 of the outlet chamber 22 via a PVC flexible hose, and similarly, the outlet of the second solenoid valve 6 is connected to the foam storage chamber 64 via another flexible hose.

[0027] The foam storage chamber 64 is an independent hollow container, injection molded from polypropylene or polyethylene, with a volume of 50-200 ml. The foam storage chamber 64 can be installed in the mounting space on the back of the urinal 1 via a mounting bracket. The soap bottle 61 can be blow molded from high-density polyethylene. The foam pump 62 is a small diaphragm pump or peristaltic pump, with the pump body made of engineering plastic and the internal diaphragm made of silicone or EPDM rubber. The inlet of the foam pump 62 is inserted into the bottom of the soap bottle 61 via a silicone hose, and the outlet is connected to the inlet of the foam storage chamber 64 via another silicone hose. The outlet of the second solenoid valve 6 is connected to the inlet of the foam storage chamber 64 via a PVC hose, and the outlet of the foam storage chamber 64 is connected to the foam inlet pipe 23 on the housing 20 via a hose.

[0028] The control circuit board 3 is made of epoxy fiberglass board and integrates electronic components such as a microcontroller, relays, voltage regulator circuits, and timers. The control circuit board 3 is fixed to a sealed waterproof plastic box by four copper posts and screws. This waterproof box is then fixed to the back of the urinal 1 or one side of the housing 20. The input terminal of the control circuit board 3 is connected to the power supply 30, and the output terminals are connected to the coils of the first solenoid valve 5, the second solenoid valve 6, and the motor of the foam pump 62 via wires.

[0029] In one embodiment, the foam dispensing system operates as follows: When the control circuit board 3 receives a command to start foam cleaning, it simultaneously opens the second solenoid valve 6 and the foam pump 62. After the second solenoid valve 6 opens, external water continuously flows into the foam storage chamber 64 via the main water inlet pipe 4, the second solenoid valve 6, and the connecting hose. Simultaneously, the foam pump 62 starts, drawing soap solution from the soap bottle 61 through the silicone hose and continuously pumping it into the foam storage chamber 64. The water and soap solution meet and mix in the foam storage chamber 64, forming a soap solution mixture. Since both the second solenoid valve 6 and the foam pump 62 remain open, new water and soap solution continuously enter the foam storage chamber 64, continuously filling the chamber and generating a certain positive pressure. The mixture flows out from the outlet of the foam storage chamber 64, enters the foam inlet pipe 23 on the housing 20 via the connecting hose, and then flows into the foam outlet chamber 21. After a brief accumulation in the foam chamber 21, the mixture flows out evenly from the foam outlet 210 and adheres to the ceramic inner wall of the urinal 1. The entire delivery process is completed by the pumping pressure provided by the second solenoid valve 6 and the foam pump 62. The control circuit board 3 presets the simultaneous opening time of the second solenoid valve 6 and the foam pump 62 to control the total output of the mixture. After the preset time is reached, the control circuit board 3 simultaneously closes the second solenoid valve 6 and the foam pump 62, stopping the injection of clean water and soap, and the foaming action ends. Subsequently, the control circuit board 3 restarts the first solenoid valve 5 to rinse with clean water according to a preset waiting time (e.g., 1 to 5 minutes), thereby realizing the step-by-step cleaning function.

[0030] In terms of overall installation layout, the main water inlet pipe 4, the first solenoid valve 5, the second solenoid valve 6, the foam storage chamber 64, the soap bottle 61, the foam pump 62, and the control circuit board 3 can all be integrated into the recessed space on the back of the urinal 1, or uniformly encapsulated in an independent integrated box, which is fixed to the wall behind the urinal 1 by expansion bolts.

[0031] In another technical solution, the foam dispensing system further includes an air pump 63 and a pressure sensing module 640. The outlet of the air pump 63 is connected to the foam storage chamber 64 via a pipeline. The pressure sensing module 640 is connected in series in the pipeline between the foam storage chamber 64 and the foam dispensing chamber 21. The pressure sensing module 640 is used to release pressure when the internal pressure of the foam storage chamber 64 reaches a threshold. The control circuit board 3 is electrically connected to the air pump 63. The air pump 63 can be a miniature diaphragm air pump, with its outlet connected to the upper part or top of the foam storage chamber 64. The pressure sensing module 640 can adopt a purely mechanical structure, such as a spring-loaded pressure relief valve, which automatically opens when the pressure in the pipeline exceeds the preset force of the spring; alternatively, it can use an electronic pressure sensor in conjunction with an electrically controlled valve. The sensor detects the pressure signal and transmits it to the control circuit board 3, which then controls the valve to open. The control circuit board 3 is electrically connected to the air pump 63 and is used to control the start and stop of the air pump 63, while also controlling the corresponding valve based on the pressure signal.

[0032] The control circuit board 3 first opens the second solenoid valve 6 and the foam pump 62 to inject water and soap solution into the foam storage chamber 64. After the injection is complete, the second solenoid valve 6 and the foam pump 62 are closed, and then the air pump 63 is turned on. The air pump 63 continuously pumps air into the foam storage chamber 64, causing the mixture inside the chamber to foam and form high pressure. At this time, the pressure sensing module 640 is in the closed state, the outlet of the foam storage chamber 64 is sealed, and the pressure inside the chamber continues to rise. When the pressure reaches the preset threshold of the pressure sensing module 640, the pressure sensing module 640 opens, and the high-pressure foam mixture quickly rushes out from the outlet of the foam storage chamber 64, passes through the pressure sensing module 640 and the foam inlet pipe 23 into the foam outlet chamber 21, and is sprayed at high speed from the foam outlet 210 onto the ceramic inner wall of the urinal 1. After the pressure is released, the pressure sensing module 640 closes again.

[0033] In another technical solution, the water outlet system further includes an ozone generator 52 and a venturi tube 51. The venturi tube 51 is connected in series in the pipeline between the first solenoid valve 5 and the water outlet chamber 22. The outlet of the ozone generator 52 is connected to the inlet of the venturi tube 51. The venturi tube 51 is a hollow tube with a tapered, throated, and expanding structure, and its material can be injection molded from brass, stainless steel, or engineering plastics (such as polyoxymethylene POM). The inlet end of the venturi tube 51 is connected to the outlet of the first solenoid valve 5 via an internal thread or quick connector, and the outlet end is connected to the inlet pipe 24 of the water outlet chamber 22 via a flexible or rigid pipe, thereby realizing the series connection of the venturi tube 51 in the pipeline between the first solenoid valve 5 and the water outlet chamber 22. The ozone generator 52 adopts a high-voltage discharge type or ultraviolet irradiation type ozone generating module, and its core component is a ceramic plate or quartz glass tube, which is externally encapsulated in a waterproof plastic shell. The outlet of the ozone generator 52 is sealed to the inlet of the venturi tube 51 via an ozone-resistant silicone or Teflon tube. A pagoda connector with spring clamps can be used to secure the connection and prevent leakage. The power input of the ozone generator 52 is connected to the corresponding output port of the control circuit board 3 via a wire, and its operation is controlled by the control circuit board 3. When the first solenoid valve 5 is opened, water flows through the main inlet pipe 4 and the first solenoid valve 5 into the venturi tube 51. As water flows through the throat of the venturi tube 51, the flow velocity increases and the static pressure decreases, creating a negative pressure. Under this negative pressure, the ozone gas generated by the ozone generator 52 is drawn into the venturi tube 51 through the inlet and mixes thoroughly with the water to form ozone water with sterilization and deodorization functions. This ozone water then flows through a pipeline into the outlet chamber 22 and out through the outlet 221 to disinfect and rinse the ceramic surface of the urinal 1. The venturi tube 51 and the ozone generator 52 can be installed together in the integrated box on the back of the urinal 1 or in the reserved slot of the housing 20. The ozone generator 52 should be installed higher than the venturi tube 51 to prevent backflow.

[0034] In another technical solution, the water outlet 221 is located above the foam outlet 210, and the end of the foam outlet 210 smoothly connects to the wall of the urinal 1. The water outlet 221 and the foam outlet 210 on the housing 20 are arranged vertically, with the water outlet 221 closer to the upper edge of the urinal 1 and the foam outlet 210 located below it. The distance between them can be designed to be 30 to 80 mm according to the curvature of the ceramic surface of the urinal 1. The water outlet 221 is straight or curved, and its opening direction is obliquely downward pointing towards the inner wall of the urinal 1 so that the water flow can quickly flush the entire inner wall surface. The end of the foam outlet 210, facing the inner wall of the urinal 1, does not leave any protrusions or recesses between it and the ceramic wall of the urinal 1, but rather achieves a smooth connection with the wall of the urinal 1 through the transition curve of the housing 20 at that point. To achieve a smooth transition, the housing 20 has an integrally injection-molded concave arc-shaped guide surface around the foam outlet 210. The radius of curvature of this guide surface matches the curvature of the ceramic wall surface at the corresponding position of the urinal 1. When the housing 20 is fixed to the back of the urinal 1, the arc-shaped guide surface is in close contact with the outer side of the urinal 1 wall, making the outlet edge of the foam outlet 210 basically flush with the wall surface of the urinal 1, without obvious gaps or sharp edges. The foam outlet 210 itself can be one or more circular holes, strip holes, or fan-shaped holes, and its inner wall can be provided with a guide slope to guide the foam to flow outward and downward.

[0035] When rinsing with clean water, the water flows from top to bottom, effectively covering the area where the foam outlet 210 is located, washing away residual foam and dissolved dirt, and preventing foam from accumulating and drying around the foam outlet 210. The end of the foam outlet 210 smoothly connects to the wall of the urinal 1, allowing the foam to adhere directly to the ceramic surface as it flows out of the foam outlet 210, without being blocked or splashed by steps or gaps. The foam can be evenly spread on the ceramic wall, improving the wall adhesion time and cleaning coverage. At the same time, the smooth connection design also facilitates daily cleaning of the ceramic surface and prevents dirt from accumulating. A layer of neutral silicone sealant can also be applied to the joint between the housing 20 and the wall of the urinal 1, ensuring the sealing of the joint and further eliminating tiny gaps.

[0036] In another technical solution, a buzzer 8 is also included, which is electrically connected to the control circuit board 3. The buzzer 8 is a passive or active electromagnetic buzzer with a rated voltage of DC 3V to 12V, and is cylindrical or flat in shape. The buzzer 8 is led out through a wire and fixed to the side wall of the integrated housing or the mounting space on the back of the urinal 1. Silicone or hot melt adhesive can be used for positioning during installation to prevent vibration and abnormal noise. The input terminal of the buzzer 8 is electrically connected to the corresponding I / O port of the control circuit board 3. The control circuit board 3 outputs a high-level or pulse signal according to preset conditions to drive the buzzer 8 to emit an audible prompt. The buzzer 8 can be wrapped with a waterproof and sound-permeable membrane to cope with the humid environment of the bathroom. A liquid level sensor can be installed on the bottom or side wall of the soap bottle 61 to detect the remaining soap; a water level sensor can be installed on the inner wall of the foam storage cavity 64 to detect the liquid level height inside the cavity. The signal lines of the aforementioned sensors are all connected to the input port of the control circuit board 3. When insufficient soap solution or water level is detected, the control circuit board 3 can drive the buzzer 8 to issue an alarm or stop the water filling action.

[0037] In another technical solution, a wireless control module 7 for communication with the wireless control terminal 70 is also included. The wireless control module 7 is electrically connected to the control circuit board 3. The wireless control module 7 uses a low-power Bluetooth module, a WiFi module, or a 433MHz RF module, and its core chip can be selected from ESP8266, nRF52832, or CC1101, etc. The wireless control module 7 is integrated onto a small circuit board using a surface-mount or plug-in method. This circuit board is electrically connected to the serial port or I / O port of the control circuit board 3 via four ribbon cables, or it can be directly soldered onto the control circuit board 3 to form a single unit. The antenna of the wireless control module 7 can be an onboard PCB antenna or an external whip antenna, and should be kept away from metal parts during installation to avoid signal shielding. The wireless control terminal 70 is a smartphone, tablet computer, or dedicated remote control, running a matching control application or firmware. A bidirectional communication link is established between the wireless control module 7 and the wireless control terminal 70 through pairing or networking. The control circuit board 3 receives commands from the wireless control terminal 70 via the wireless control module 7, such as remotely starting flushing, remotely starting foam cleaning, and turning off the buzzer alarm. Simultaneously, the control circuit board 3 can also transmit information such as insufficient soap solution or equipment malfunction to the wireless control terminal 70 for display via the wireless control module 7. The wireless control module 7 is powered by the power supply 30 after voltage regulation by the control circuit board 3, and its operating voltage is typically 3.3V or 5V. This technical solution enables remote monitoring and operation of the urinal, facilitating daily maintenance by management personnel.

[0038] In another technical solution, a first one-way valve 60 is also included. The first one-way valve 60 is connected in series in the pipeline between the second solenoid valve 6 and the foam storage chamber 64, and the flow direction of the first one-way valve 60 is towards the foam storage chamber 64. The first one-way valve 60 can be a spring-loaded or duckbill-type one-way valve, with the valve body made of brass, stainless steel, or engineering plastic, and internally equipped with a valve core and spring. The opening pressure is 0.01 to 0.05 MPa. The first one-way valve 60 is connected in series in the connecting pipeline between the second solenoid valve 6 and the foam storage chamber 64 through pagoda connectors or internal threads at both ends. Its installation direction is towards the foam storage chamber 64, that is, only clean water is allowed to flow from the second solenoid valve 6 to the foam storage chamber 64, preventing the soap solution mixture or foam in the foam storage chamber 64 from flowing back into the second solenoid valve 6 and the main water inlet pipe 4, thus avoiding contamination of the pipeline and the solenoid valve.

[0039] In another technical solution, a second one-way valve 631 is also included. The second one-way valve 631 is connected in series in the pipeline between the air pump 63 and the foam storage chamber 64, and the flow direction of the second one-way valve 631 is towards the foam storage chamber 64. The second one-way valve 631 is also a spring-loaded or duckbill type one-way valve, with the valve body made of engineering plastic or brass, and an opening pressure of 0.01 to 0.03 MPa. The second one-way valve 631 is connected in series in the connecting pipeline between the air pump 63 and the foam storage chamber 64 via quick connectors or threads at both ends. Its installation direction is towards the foam storage chamber 64, meaning that gas is only allowed to flow from the air pump 63 to the foam storage chamber 64, preventing the mixture or foam in the foam storage chamber 64 from backflowing into the air pump 63 when the air pump stops working, thus preventing damage to the air pump 63.

[0040] In another technical solution, both the water outlet 221 and the foam outlet 210 are downward-facing. The water outlet 221 is a strip-shaped hole, and the inner wall of the water outlet 221 and / or the foam outlet 210 has a chamfered angle that slopes towards the wall of the urinal 1. The water outlet 221 is a strip-shaped hole, extending laterally along the wall of the urinal 1, with a length of 30-80 mm and a width of 2-5 mm. The inner wall of the water outlet 221 has a chamfered angle that slopes towards the wall of the urinal 1, with an angle of 15 to 45 degrees, so that the water flow from the water outlet 221 can spread out in a fan shape and flow down close to the ceramic wall, increasing the flushing coverage area. The inner wall of the foam outlet 210 can also have a chamfered angle that slopes towards the wall of the urinal 1, or only the water outlet 221 can have a chamfer while the foam outlet 210 remains a straight hole, depending on the foam flow characteristics. The chamfered structure can be directly formed using injection molding, requiring no further processing. This technical solution, through the guiding effect of the slotted holes and chamfers, allows the water curtain and foam layer to adhere evenly to the ceramic surface, preventing splashing and deviation, and improving cleaning effectiveness.

[0041] In another technical solution, a sensor 9 is also included. The sensor 9 is mounted on the urinal 1 and electrically connected to the control circuit board 3. The sensor 9 uses an infrared pyroelectric sensor, a microwave radar sensor, or an active infrared beam sensor, and its operating voltage is DC 5V or 12V. The sensor 9 is installed inside the housing above the front of the urinal 1 or in a pre-drilled hole in the top cover of the urinal 1, with the sensing window facing the user's standing area. The signal output terminal of the sensor 9 is electrically connected to the input port of the control circuit board 3 via a three-core shielded cable, and the power supply is provided by the control circuit board 3 with a regulated power supply. When the sensor 9 detects a user entering the sensing range, it outputs a high-level signal; after the user leaves, it outputs a low-level signal. The control circuit board 3 determines whether the user has left based on the change in this signal, thereby triggering a flushing or foam cleaning program. The sensor 9 can be covered with an infrared-transparent plastic panel for waterproofing and dustproofing. This technical solution achieves automatic sensing flushing and intelligent cleaning triggering of the urinal.

[0042] The number of devices and processing scale described herein are for the purpose of simplifying the description of the invention. Applications, modifications, and variations of the invention will be readily apparent to those skilled in the art.

[0043] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A self-cleaning urinal, characterized in that, include: urinal (1); The cleaning structure assembly (2) includes a housing (20) fixed to the wall of the urinal (1). The housing (20) has a foam outlet chamber (21) and a water outlet chamber (22) that are independent of each other. The foam outlet chamber (21) is provided with a foam outlet (210), and the water outlet chamber (22) is provided with a water outlet (221). The foam outlet (210) and the water outlet (221) are located on the outside of the wall of the urinal (1). The main water inlet pipe (4) is used to connect to an external water source; The water outlet system includes a first solenoid valve (5), which is installed on the connecting pipe between the main water inlet pipe (4) and the water outlet chamber (22); The foam dispensing system includes a foam storage chamber (64), a soap bottle (61), a foam pump (62), and a second solenoid valve (6). The inlet and outlet of the foam pump (62) are connected to the soap bottle (61) and the foam storage chamber (64), respectively. The second solenoid valve (6) is installed on the connecting pipe between the main water inlet pipe (4) and the foam storage chamber (64). The outlet of the foam storage chamber (64) is connected to the foam dispensing chamber (21). The control circuit board (3) is electrically connected to the first solenoid valve (5), the second solenoid valve (6), and the foam pump (62); The power supply (30) is electrically connected to the control circuit board (3).

2. The self-cleaning urinal as described in claim 1, characterized in that, The foam dispensing system also includes an air pump (63) and a pressure sensing module (640). The outlet of the air pump (63) is connected to the foam storage chamber (64) through a pipeline. The pressure sensing module (640) is connected in series in the pipeline between the foam storage chamber (64) and the foam dispensing chamber (21). The pressure sensing module (640) is used to open the pressure relief when the pressure inside the foam storage chamber (64) reaches a threshold. The control circuit board (3) is electrically connected to the air pump (63).

3. The self-cleaning urinal as described in claim 1, characterized in that, The water outlet system also includes an ozone generator (52) and a venturi tube (51). The venturi tube (51) is connected in series in the pipeline between the first solenoid valve (5) and the water outlet chamber (22). The outlet of the ozone generator (52) is connected to the inlet of the venturi tube (51).

4. The self-cleaning urinal as described in claim 1, characterized in that, The water outlet (221) is located above the foam outlet (210), and the end of the foam outlet (210) is smoothly connected to the wall of the urinal (1).

5. The self-cleaning urinal as described in claim 1, characterized in that, It also includes a buzzer (8), which is electrically connected to the control circuit board (3).

6. The self-cleaning urinal as described in claim 1, characterized in that, It also includes a wireless control module (7) for communicating with the wireless control terminal (70), the wireless control module (7) being electrically connected to the control circuit board (3).

7. The self-cleaning urinal as described in claim 1, characterized in that, It also includes a first check valve (60), which is connected in series in the pipeline between the second solenoid valve (6) and the foam storage chamber (64), and the flow direction of the first check valve (60) is towards the foam storage chamber (64).

8. The self-cleaning urinal as described in claim 2, characterized in that, It also includes a second check valve (631), which is connected in series in the pipeline between the air pump (63) and the foam storage chamber (64), and the flow direction of the second check valve (631) is towards the foam storage chamber (64).

9. The self-cleaning urinal as described in claim 1, characterized in that, Both the water outlet (221) and the foam outlet (210) are arranged downwards. The water outlet (221) is a strip-shaped hole, and the inner wall of the water outlet (221) and / or the foam outlet (210) is provided with a chamfer that is inclined towards the wall of the urinal (1).

10. The self-cleaning urinal as described in claim 1, characterized in that, It also includes a sensor (9), which is mounted on the urinal (1) and electrically connected to the control circuit board (3).

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