| 摘要 |
<p>1482384 Heat pumps PROJECTUS INDUSTRIPRODUKTER AB 14 April 1975 [18 April 1974] 15258/75 Headings F4H and F4U A heat pump system for a building comprises two refrigeration circuits connected in cascade, the condenser 12 of a first circuit being in heat exchange contact with the evaporator 4 of a second circuit. The first circuit comprises a compressor 3, a second condenser 26 connected in parallel with a shunt line 27 in the circuit, a droplet collector 5, and an evaporator 2 preferably located outside the building. The second circuit comprises a compressor 8, a droplet collector 10, and a condenser 9. The first and second circuits are connected in a water heating installation which includes a fuel-fired water heating boiler 14, a water heater 16, and a radiator supply system comprising feed line 17, return line 18, pump 22, shunt line 31 and shunt valve 32. The second condenser is in heat exchange contact with the shunt line 31 either, depending on valve 32, to supply additional heat to the radiator supply line 17 or to return the flow back to pipe 21.</p> |
