초록 ▼

A thermal zone demand controlled dual cascade arranged heat pump system and system controller for building spaces, having first and second heat pumps and having an air circulation system for circulating air to and from said thermal zones and including a conditioned air chamber having first and secon

A thermal zone demand controlled dual cascade arranged heat pump system and system controller for building spaces, having first and second heat pumps and having an air circulation system for circulating air to and from said thermal zones and including a conditioned air chamber having first and second heat exchange refrigerant coils being connected in refrigerant circulating relation respectively with the heat pumps. A plurality of thermal zone blowers conduct conditioned air, heated or cooled, from the conditioned air chamber to respective thermal zones of the building space. Electronic controller circuitry of the system is coupled for thermal demand control of the heat pumps and the thermal zone blowers for operation of the first heat pump to accommodate a predetermined range of thermal load and for operation of the second heat pump along with the first heat pump to accommodate a greater thermal load. The controller circuitry also controls selective operation of the thermal zone blowers as well as operation of the thermal zone blowers at low blower speed or high blower speed responsive to sensed conditions of thermal load. The electronic controller circuitry further provides for selective reversal of dual heat pump operation to compensate for unequal operational wear of the heat pump units.

대표청구항 ▼

A thermal zone demand controlled dual cascade arranged heat pump system and system controller for heating and cooling the air of building spaces having a plurality of thermal zones, comprising: (a) an air circulation system for circulating air to and from said thermal zones and having a conditioned

A thermal zone demand controlled dual cascade arranged heat pump system and system controller for heating and cooling the air of building spaces having a plurality of thermal zones, comprising: (a) an air circulation system for circulating air to and from said thermal zones and having a conditioned air chamber and a plurality of air supply conduits each for connection in air supplying relation with a respective one of said thermal zones of said building space; (b) first and second heat pumps being located externally of said building space and having first and second heat exchange refrigerant coils located in series within said air circulation system therein being connected in refrigerant circulating relation respectively with said first and second heat pumps and selectively heating and cooling air flowing to said conditioned air chamber; (c) a plurality of thermal zone blowers being connected in said air circulation system and in air supplying relation with respective air supply conduits for conducting conditioned air from said conditioned air chamber through respective air supply conduits to respective thermal zones of said building space; and (d) electronic controller circuitry being coupled for thermal demand control of said first and second heat pumps and said plurality of thermal zone blowers for operation of said first heat pump to accommodate a predetermined range of thermal load and for operation of said second heat pump to accommodate a range of thermal load in excess of said predetermined range of thermal load and for selective operation of said plurality of thermal zone blowers and when operating for selective operation of said thermal zone blowers at low blower speed and high blower speed responsive to sensed conditions of thermal load.