| 摘要 |
PCT No. PCT/EP91/00946 Sec. 371 Date Jan. 15, 1992 Sec. 102(e) Date Jan. 15, 1992 PCT Filed May 21, 1991 PCT Pub. No. WO91/18246 PCT Pub. Date Nov. 28, 1991.The volume of water in circulation is controlled by means of a bell-type mixer (4) which has a stationary section disc (6) and a somewhat sickle-shaped rotary distributor bell (7). The section disc has at least three separate passage openings, the first of which is connected with the boiler feed pipe (KV), the second (12) with the heating pipe (HV) and the third with the boiler return pipe. The distributor bell (7) is acted upon externally by the heating return water pressure and internally housing a communication duct (19). The distributor bell shunts the boiler feed pipe over a limited area of rotation via the second passage opening (12) with the heating pipe and simultaneously frees a variable area of the opening into the second passage for the admixture of return water. In this way optimal regulation is achieved with little structural, maintenance or operational outlay.
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