| 摘要 |
The invention relates to an apparatus ( 1 ) for controlling the pressure difference in a heating or cooling system, which comprises a heating or a cooling source ( 2 ) and a feed duct ( 3 ) as well as a return duct ( 4 ), connected to the source, and consumption devices ( 5 ) disposed between the ducts, which emit or receive heat, at least one valve or the like ( 6 and 7 and 8, respectively) being used to control the flow through such a loop, and a pressure difference regulator ( 9 ) being used to keep the pressure difference between the feed duct and the return duct constant. According to the invention, the pressure difference regulator ( 9 ) is optionally mounted in one of the ducts ( 3 or 4 ) and is provided with signaling terminals ( 29 and 27 and 32 and 30, 31, respectively) connected to the inlet ( 17 ) and the outlet ( 28 ), respectively, as well as to the low pressure regulating side ( 18 ) and the high pressure regulating side ( 15 ), respectively. At least one valve or the like ( 6 and 7, respectively), mounted in the other duct ( 4 and 3, respectively) in relation to the duct ( 3 and 4, respectively) of the pressure difference regulator, is provided with signaling terminals ( 23; 34 and 12; 33, respectively), connected to its inlet ( 21 and 24, respectively) and outlet ( 14 and 22, respectively). The pressure difference regulator is controlled via optional signaling ducts ( 13 and 16 and 19 and 20 and 25 and 26, respectively) between the terminals.
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