| 摘要 |
<p>An air source heat pump wherein heat is extracted from air at ambient temperature in an evaporator (4) and heat is rejected at a higher temperature in a condenser (2); further comprises an auxiliary heater (7) arranged to preheat the ambient air when required to prevent deposition of frost on the evaporator. The combustion heater may be a gas fired boiler, arranged to heat recirculating water for supplying heating radiators and wherein the flue gases mix with the ambient air before it passes over the evaporator.</p> |
