G - Physics – 05 – D
Patent
G - Physics
05
D
G05D 23/19 (2006.01) F25B 49/02 (2006.01) G05D 23/24 (2006.01)
Patent
CA 2063134
A method for regulating the temperature of a medium and a temperature-regulating device for implementing that method makes use of a temperature control loop which comprises a coolant circuit with a compressor arrangement (1), makes use of or contains a temperature detector (7) for generating a measuring signal representing the temperature actual value, a comparator (10) for comparing the measuring signal with the upper and lower limit (To, Tu) of a neutral zone extending on both sides of a temperature desired value, and a switch mechanism (9) by which an output stage of the compressor arrangement (1) is switched on or off by way of two time-delay elements (11, 12) when the measuring signal exceeds or falls below the neutral zone. One of the time-delay elements (11) is actuated when the change in the measuring signal alters from falling to rising. The other time-delay element (12) is actuated when the change in the measuring signal alters from rising to falling. If the measuring signal exceeds the upper limit (To) beyond the running time of the one time-delay element (11), an output stage of the compressor arrangement is switched on, and if the measuring signal falls below the lower limit (Tu) beyond the running time of the other time-delay element (12), a compressor output stage is switched off. In this manner, severe overswings are avoided and a stable control within narrow limits is achieved.
Danfoss A/s
Macrae & Co.
LandOfFree
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