Controlling continuous flow water heater esp. electric heater - controlling determined throughput amount per unit time and correcting power supplied depending on determined outlet temp. of heated water

摘要

The temp. of the incoming water is taken, and with this the computed energy needed for the heating of the water to an outlet desired temp., with the desired throughput, is supplied. With a difference between the actual outlet temp. and the desired outlet temp. after reaching a stable position, with the repeated inlet temp. corrected according to the difference established between the detected outlet temp. and the desired outlet temp., the computed energy is supplied. The outlet temps. with the different throughputs and the difference corresp. to the outlet temps. and to the power value related to the associated throughput are computed and used to correct the computation for the power. The continuous flow heater is connected with a water inlet across a flowmeter (1), and a thermometer probe (4) is arranged in the outlet (3) of the heating block (2), which is connected to the mains across a power control (5). The power control is connected to a control (7), which is connected to the signal outputs of the continuous flowmeter (1) and the thermometer probe (4), as well as to a desired value transmitter for setting the outlet temp. ADVANTAGE - Sensing units reduced, lowering cost, so that less space for wiring is required. Carried out in simple manner.