| 摘要 |
<p>PCT No. PCT/DK87/00002 Sec. 371 Date Sep. 10, 1987 Sec. 102(e) Date Sep. 10, 1987 PCT Filed Jan. 12, 1987 PCT Pub. No. WO87/04520 PCT Pub. Date Jul. 30, 1987.In order to control the tightness of a central heating system (10, 11) which may be connected to a district heating system (1, 2), the system is provided with a flow meter (8, 9) and a valve (6, 7) in the flow (3) and return pipes (4), respectively. Hereby it becomes possible to monitor the liquid flow through the flow meters (8, 9) and in a control unit (15) to compare the signals from the flow meters (8, 9) in order subsequently to produce a signal for an electric motor on the inflow valve (6) when a certain limit value is exceeded in order to shut off the flow of water into the system (10,11) and to a signalling device (16), if any.</p> |
