Abstract: A modular smart bathroom fan includes a base exhaust fan and one or more modules. The base exhaust fan includes one or more ports that are configured to receive one or more modules. The one or more modules includes a communications module that is configured to communicate with the base exhaust fan and other modules of the one or more modules, receive information from an application or the one or more modules and generate an action to be performed by the base exhaust fan and other modules of the one or more modules.

Abstract: An apparatus includes a duct, at least one air knife, and a separation tube. The at least one air knife is configured to direct air from the fan and configured to dry one or more hands and push water from the one or more hands into the duct. The separation tube includes an inclined vane. The separation tube is connected to the duct and configured to separate the water from air.

Abstract: A hand dryer apparatus includes a fan, a duct, at least one air knife driven by the fan and configured to direct air to dry one or more hands and push water from the one or more hands into the duct, and at least one cyclone device to provide at least a partially circular path for the air and water from the hand.

Abstract: A biofilm mitigation apparatus includes a supply container, a disinfectant generator, a power source, and a delivery tube. The supply container is configured to store one or more materials for a formation of a disinfectant. The disinfectant generator is configured to generate the disinfectant from the one or more materials from the supply container. The power source is configured to provide electrical power to the disinfectant generator. The delivery tube is configured to transport the disinfectant from the disinfectant generator to a biofilm.

Abstract: An ozone mitigation system reduces the amount of ozone that is expelled from a toilet or another water consuming appliance. The ozone mitigation system may include an ozone generator in communication with a tank of the water consuming appliance. An air source and a power source may be connected to the ozone generator. An ozone flow restrictor or ozone eliminator is operable inside of the tank and configured to modify a flow of ozone from the ozone generator through the toilet tank.

Abstract: A modular smart bathroom fan includes a base exhaust fan and one or more modules. The base exhaust fan includes one or more ports that are configured to receive one or more modules. The one or more modules includes a communications module that is configured to communicate with the base exhaust fan and other modules of the one or more modules, receive information from an application or the one or more modules and generate an action to be performed by the base exhaust fan and other modules of the one or more modules.

Abstract: A toilet that includes a water tank having a vent hole; a bowl; and a system having a valve body connecting the tank and a fluid channel; a housing moveable relative to the valve body during a flush cycle to pass water from the tank into the bowl through the fluid channel, the housing having a bore that connects with the fluid channel; a fan in the bore that operates in first and second modes; a motor in the bore for rotating the fan in each mode; and a vent having an inlet fluidly connected with the bore and an outlet fluidly connected with the vent hole. In the first mode, the fan moves air from the bowl to the vent hole through the bore and vent; and in the second mode, the fan moves air from outside the tank to the bowl through the vent hole and bore.

Abstract: A toilet that includes a water tank having a vent hole; a bowl; and a system having a valve body connecting the tank and a fluid channel; a housing moveable relative to the valve body during a flush cycle to pass water from the tank into the bowl through the fluid channel, the housing having a bore that connects with the fluid channel; a fan in the bore that operates in first and second modes; a motor in the bore for rotating the fan in each mode; and a vent having an inlet fluidly connected with the bore and an outlet fluidly connected with the vent hole. In the first mode, the fan moves air from the bowl to the vent hole through the bore and vent; and in the second mode, the fan moves air from outside the tank to the bowl through the vent hole and bore.

Abstract: A plumbing fixture includes a receptacle for receiving waste, a tank for storing water, and an electrically operated pump that conveys water from the tank into the receptacle to flush the waste through a drain. The duration that the pump in operated to flush the waste is altered in response to variation of the electrical voltage supplied to the plumbing fixture. The pump is operated to decrease the amount of water in the tank when that amount is sensed to be excessive. Further operation of the pump is inhibited for a given interval to avoid overheating when the pump has been operating too frequently. The pump is cycled on and off in predefined patterns to indicate different malfunctions to a user.

Abstract: A canister type flush valve has an upright cup-shaped hollow float working under buoyancy forces without a captured air volume that controls the valve during a flush cycle. Hooded bleed openings at a bottom wall of the float can be sized and numbered to selectively control the closuring timing of the valve. Baffles of the hood bleed openings redirect water bleeding into the float to prevent the water from spraying up against the top of the tank. The geometry of a seal retaining groove is designed to reduce leakage at the float/seal interface. For example, the groove has an annular wall with a compound profile forming a non-cylindrical, preferably serpentine, seal contact area. The seal is backed by a slotted flange located just above the retaining groove.

Abstract: A flush valve for a toilet has a valve body with a flow passage that narrows non-linearly down from the valve seat. The flow passage is formed by a surface that follows a polynomial expression so as to define a computationally derived flow profile that more closely follows the narrowing exhibited by falling water as it accelerates under gravity. The non-linear flow profile of the valve reduces the presence of air in the valve after a flush cycle is initiated so that greater flush efficiency can be achieved. The flush valve can also have a wide mouth overflow that narrows to improve flow in an overflow situation.

Abstract: A plumbing fixture includes a receptacle for receiving waste, a tank for storing water, and an electrically operated pump that conveys water from the tank into the receptacle to flush the waste through a drain. The duration that the pump in operated to flush the waste is altered in response to variation of the electrical voltage supplied to the plumbing fixture. The pump is operated to decrease the amount of water in the tank when that amount is sensed to be excessive. Further operation of the pump is inhibited for a given interval to avoid overheating when the pump has been operating too frequently. The pump is cycled on and off in predefined patterns to indicate different malfunctions to a user.