| 摘要 |
<p>A fluid system is disclosed that includes a fluid supply, at least one outlet and associated outlet control device, a supply and return conduit, a return valve, a controller, and a flow switch. The outlet control device is operable between open and closed positions to allow and disallow fluid to flow from the outlet. The return valve is located proximate and connected to the outlet. The return valve is connected to the supply and return conduits, and the return valve is configured to be capable of moving between a dispensing configuration, permitting fluid passage from the supply conduit to the outlet and blocking fluid passage to the return conduit, and a recirculation configuration, permitting fluid passage from the supply conduit to the return conduit and blocking fluid passage to the outlet. The controller controls the return valve and thus controls the direction of fluid. The controller is coupled to a sensor in the supply conduit or return valve, where the sensor detects a parameter of interest in the fluid within the supply conduit or return valve. The flow switch is configured to close an electrical circuit when the fluid flow within the supply conduit reaches a predetermined flow-rate, whereby the closed circuit provides electrical power to the controller. The controller is programmed such that upon the sensor relaying that the parameter of interest meets a predetermined parameter value, the controller operates the return valve to move to either the recirculation or dispensing configuration.</p> |
