Temperature control device
AssigneesNishiyama Corporation, Aquatech Co., Ltd.
InventorsKuboyuki Sasayama, Kazuya Sato, Masahiro Kawai
Life of this patent
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Abstract
The controller 70 of the brine supply device 10 performs the PID calculation of the manipulated variable MV of the valve 14, calculates the compensated manipulated variable MV′ by compensating the manipulated value MV, and controls the operation of the valve 14 based on the compensated manipulated variable MV′. The variation ΔMV of the manipulated variable MV becomes proportional to the variation ΔPV of the brine supply temperature Pt1 as the operation of the valve 14 is controlled with the compensated manipulated variable MV′. This makes it possible to control temperature with a high accuracy using only one set of PID constants.
Claims9
A temperature control device that maintains the temperature of a load, whose heat load applied by an external heat source varies, to a setup temperature (SV(R)), comprising:
- a supply temperature detection unit that detects the current supply temperature (Pt1) of a heating medium supplied to the load;
- a load temperature detection unit that detects the current temperature (Pt2) of the load;
- an adjusting unit that adjusts the supply temperature (Pt1) of the heating medium;
- an acquiring unit for acquiring in advance a first temperature change curve (L1) of the load when said heat load is changed while maintaining the supply temperature (Pt1) of the heating medium constant;
- a first calculating unit for calculating an imaginary second temperature change curve (L2) of the load, which is in axial symmetry with said first temperature change curve (L1), based on the setup temperature (SV(R)) of the load;
- a second calculating unit for calculating a target temperature change curve (L3) of the heating medium for realizing said second temperature change curve (L2);
- and
- a control unit for controlling said adjusting unit so that the supply temperature (Pt1) of the heating medium changes according to said target temperature change curve (L3) when the heat load applied to the load by said external heat source is changed.
Dependencies are inferred from the claim text.