Abstract: A hot water pressure washer employs an internal combustion engine with a drive shaft having an exhaust manifold fluidly connected to an exhaust water heat exchanger. The engine is driveably connected to a hydrodynamic heater, and a high-pressure pump for generating a stream of high-pressure fluid. The hot water pressure washer captures 80-90% of the thermal energy generated during combustion processes of the engine for heating water.

Abstract: A hydrodynamic heater pump may include a housing and a stator fixed relative to the housing. A rotor may be coaxially aligned with and positioned adjacent the stator. The rotor and the stator define an interior region of a hydrodynamic chamber operable for heating a fluid present within the interior region of the hydrodynamic chamber. The rotor may be attached to a drive shaft for concurrent rotation therewith. The rotor may be moved axially along an axis of rotation of the drive shaft between a pumping mode position and a heating mode position. The rotor may be located a first distance from the stator when arranged in the heating mode position and a second distance from the stator when arranged in the pumping mode position. The second distance may be greater than the first distance.

Abstract: A hydrodynamic heater includes an inlet port for receiving a stream of fluid from an external source and an outlet port for discharging a stream of heated fluid from the hydrodynamic heater. A hydrodynamic chamber operates to selectively heat fluid present within an interior region of the hydrodynamic chamber. The hydrodynamic chamber includes an inlet port located proximate a center of the interior region of the hydrodynamic chamber and an outlet port located along an interior wall of the hydrodynamic chamber. The hydrodynamic chamber inlet port is fluidly connected to the inlet port of the hydrodynamic heater. The hydrodynamic heater includes a control valve fluidly connected to the hydrodynamic chamber outlet port and the hydrodynamic heater outlet port. A fluid metering device connected in series with the control valve is fluidly connected to the hydrodynamic chamber outlet port and the hydrodynamic heater outlet port.

Abstract: Disclosed herein is a supplemental heating system including a liquid heat generator having a hydrodynamic chamber for selectively heating a fluid. The hydrodynamic chamber having an inlet port for delivering the fluid to the hydrodynamic chamber, and a discharge port for removing heated fluid from the hydrodynamic chamber. The inlet port is fluidly connected to a first check valve and the discharge port is fluidly connected to a second check valve. The first check valve adapted to receive an input from the second check valve. The first check valve operable to close the fluid path between the first check valve and the inlet port in response to an input received from the second check valve.

Abstract: Disclosed herein is an exemplary supplemental heating system including a hydrodynamic heater and a heat exchanger. The hydrodynamic heater includes a hydrodynamic chamber disposed within an interior cavity of the hydrodynamic heater. The hydrodynamic chamber is operable for selectively heating a fluid present within the hydrodynamic chamber when the heating apparatus is connected to a fluid supply source. The hydrodynamic heater includes an inlet port fluidly connected to a discharge port of the heat exchanger, and a discharge port fluidly connected to an inlet port of the heat exchanger. The heat exchanger includes a heat exchanger core disposed within an interior cavity of the heat exchanger. A wall at least partially defines the interior cavity of the hydrodynamic heater and the interior cavity of the heat exchanger.

Abstract: A preferred embodiment supplemental heating system is fluidly connectable to a vehicle cooling system and includes a liquid heat generator operable for heating a cooling fluid delivered to the supplemental heating system from the vehicle's cooling system. The liquid heat generator includes a discharge passage connectable to a heater core of the vehicle and a inlet passage connectable to the vehicle's cooling system. The supplemental heating system further includes a control valve having an inlet connectable to an exit passage of a heater core of the vehicle, a discharge passage fluidly connected to the liquid heat generator, and a second discharge passage connectable to the vehicle's cooling system. The control valve is operable for controlling the proportion of cooling fluid exiting the heater core that is returned to the vehicle's cooling system and recirculated back to the liquid heat generator.

Abstract: Disclosed herein is an exemplary liquid heat generator including a housing and a rotor disposed within the housing. A flexible pressure relief diaphragm is attached to the rotor. The pressure relief diaphragm includes a seal ring that engages a seal seat attached to the housing.

Abstract: Disclosed herein is an exemplary supplemental heating system including a liquid heat generator having a hydrodynamic chamber for selectively heating a fluid. The supplemental heating system further includes a manifold having an inlet passage fluidly connectable to a discharge passage of a heat exchanger, a first discharge passage fluidly connectable to an engine cooling system, and a second discharge passage fluidly connected to an inlet passage of the hydrodynamic chamber. A control valve comprising a spool slideably disposed within the manifold controls distribution of the fluid between the manifold inlet passage and the first manifold discharge passage, and the manifold inlet passage and the manifold second discharge passage.