초록 ▼

A heating system with a hot water coil is provided with a variable speed blower whose speed is regulated in response to a sensed load in the system. Heat can therefore be added to the hot water by way of a simple burner system, with the required control being effected by selectively varying the amou

A heating system with a hot water coil is provided with a variable speed blower whose speed is regulated in response to a sensed load in the system. Heat can therefore be added to the hot water by way of a simple burner system, with the required control being effected by selectively varying the amount of heat that is removed from the hot water by controlling the fan speed. When applied to a zone controlled system, the need for a bypass duct is obviated.

대표청구항 ▼

In a heating system of the type having a heater for selectively adding heat to a first fluid for maintaining its temperature at a predetermined level, and a heat exchanger connected thereto for receiving a flow of said first fluid at said predetermined temperature and returning a flow thereof at ano

In a heating system of the type having a heater for selectively adding heat to a first fluid for maintaining its temperature at a predetermined level, and a heat exchanger connected thereto for receiving a flow of said first fluid at said predetermined temperature and returning a flow thereof at another cooler temperature, an improved temperature control system comprising: a fan for circulating a second fluid over said heat exchanger to facilitate the transfer of heat to said second fluid for delivery to a distribution system downstream thereof, said fan being capable of operating over a continuous and wide range of speeds; means for determining, over a continuous range, the heating load requirements of said downstream distribution system; and means for varying the speed of said fan in response to said heating load requirements, wherein said means for determining the heating load requirements comprises: at least one thermostat for determining the thermostat error in said downstream distribution system; and a controller for calculating the needed change in system capacity as a function of said thermostat error, and for further determining a new system capacity as a function of an old system capacity modified by said needed capacity change.