Method of controlling a variable delivery pump fitted to a heating system

摘要

Method of controlling a variable delivery pump fitted to a heating system comprising: a heat exchanger connected to two circuits of fluids, the variable delivery pump making it possible to vary the flow-rate of the first fluid inside the heat exchanger; a return loop on the primary circuit allowing the first fluid reaching the input of the heat exchanger to mix with a portion of the first fluid coming from the output of the exchanger; a first temperature sensor measuring a temperature of the second fluid coming from the secondary circuit; a second temperature sensor measuring a temperature of the first fluid coming from a primary circuit; a control unit electrically connected to the first and second temperature sensors, the sensors generating electrical signals as functions of the temperatures and constituting electrical input signals of the control unit.

主权项

1. Method of controlling a variable delivery pump fitted to a heating system comprising:
a heat exchanger connected to two circuits of fluids, and wherein a first fluid coming from a primary circuit transmits heat energy to a second fluid coming from a secondary circuit, said variable delivery pump making it possible to vary the flow-rate of the first fluid inside the heat exchanger; a return loop on the primary circuit allowing the first fluid reaching the input of the heat exchanger to mix with a portion of the first fluid coming from the output of the exchanger; a first temperature sensor provided at the output of the heat exchanger and measuring a first temperature of the second fluid coming from the secondary circuit; a second temperature sensor arranged at the output of the heat exchanger and measuring a second temperature of the first fluid coming from a primary circuit; a control unit electrically connected to said first and second temperature sensors said sensors generating electrical signals as functions of the temperatures and constituting electrical input signals of the control unit, said control unit being capable of generating at output an instruction for controlling the variable delivery pump; wherein the instruction for controlling the variable delivery pump is generated by comparing each first and second temperature respectively relative to first and second threshold values, and in that: when said first and second temperatures are simultaneously below the first and second threshold values respectively the rated voltage of the control instruction signal increases in order to step up the delivery of the pump, and; when the first and second temperatures are simultaneously higher than the first and second threshold values respectively the rated voltage of the control instruction signal decreases in order to reduce the delivery of the pump.