| 摘要 |
<p>In a heat pump system for domestic hot water, a compressor section (18) provides working fluid at a multiplicity of pressures. Multiple condensers (12, 14) are arranged so that higher pressure working fluid is in heat exchange relationship with higher temperature water. Upon leaving the condensers (12, 14), working fluid is independently expanded and then combined, and it runs through a single evaporator (31) before returning to the compressor (18). The water may be circulated past an external condenser (12, 14) or the condensers (46, 48) may be immersed in a hot water storage tank (38).</p> |
