Patent ID: 6275654
Filing Date: 2001-08-14
Classification: B08B,F04B

Abstract:
An apparatus comprising:a fluid heating unit including:a fluid heating reservoir having:a reservoir input connected to a fluid supplya reservoir output; anda heater having at least on heating element inserted into the reservoir for heating a fluid contained in the reservoir;a pressurized, re-circulating pump assembly in fluid communication with the heating unit output including:an oversized pump driven by an undersized motor where the pump comprises:a low pressure side input including:a re-circulation connection for receiving a re-circulation flow;a high pressure side output including:an unloader valve having:an re-circulation outlet connected to the re-circulation connection of the low pressure input side where the re-circulation flow exist whenever a pressure at the unloader valve exceeds a re-circulation pressure; anda fluid outlet;an output device connected to the unloader valve fluid outlet which supports a cleaning fluid flow rate whenever the output device is in an open condition; andan electrical control unit for supplying electrical energy to the heater and motorswhere the pump has a maximum capacity about 10 to 100% greater than a desired operating flow output and pressure of the system allowing for the motor to be undersized increasing apparatus lifetime.