Combustion heat source device

Abstract

A combustion heat source device may include: a housing; a burner housed within the housing; a combustion fan configured to supply air for combustion to the burner; a heat exchanger configured to be heated by combustion of the burner; a temperature sensor configured to detect a temperature of fluid flowing into or out of the heat exchanger; and a controller configured to operate the fan when the burner is operating. A rotation speed of the fan when the burner is operating may correspond to a heating amount by the burner. The controller may be configured to increase the heating amount by the burner when the heating amount is within a first heating amount range and the temperature detected by the temperature sensor exceeds a first reference temperature corresponding to the first range, so that the heating amount enters a second heating amount range that is higher than the first range.

What is claimed is: 
     
         1 . A combustion heat source device comprising:
 a housing;   a burner housed within the housing;   a combustion fan configured to supply air for combustion to the burner;   a heat exchanger configured to be heated by combustion of the burner;   a temperature sensor configured to detect a temperature of fluid flowing into or out of the heat exchanger; and   a controller,   wherein the controller is configured to operate the combustion fan when the burner is operating,   a rotation speed of the combustion fan when the burner is operating corresponds to a heating amount by the burner, and   the controller is configured to increase the heating amount by the burner when the heating amount by the burner is within a first heating amount range and the temperature detected by the temperature sensor exceeds a first reference temperature corresponding to the first heating amount range, so that the heating amount by the burner enters a second heating amount range that is higher than the first heating amount range.   
     
     
         2 . The combustion heat source device according to  claim 1 , wherein the controller is configured to extinguish the burner when an extinguishing condition that the temperature detected by the temperature sensor exceeds an upper limit temperature higher than the first reference temperature is satisfied, and to continue operating the combustion fan even after the extinguishing condition is satisfied and the burner is extinguished. 
     
     
         3 . The combustion heat source device according to  claim 2 , wherein the controller is configured to re-ignite the burner when a predetermined time elapses after the extinguishing condition is satisfied and the burner is extinguished. 
     
     
         4 . The combustion heat source device according to  claim 3 , wherein the controller is configured not to re-ignite the burner even if the predetermined time elapses after the extinguishing condition is satisfied and the burner is extinguished, unless a re-ignition condition that the temperature detected by the temperature sensor falls below a lower limit temperature lower than the first reference temperature is satisfied. 
     
     
         5 . The combustion heat source device according to  claim 2 , further comprising a circulation pump configured to deliver the fluid to the heat exchanger,
 wherein the controller is configured to operate the circulation pump when the burner is operating, and to continue operating the circulation pump even after the extinguishing condition is satisfied and the burner is extinguished.   
     
     
         6 . The combustion heat source device according to  claim 1 , wherein the controller is configured to increase the heating amount by the burner when the heating amount by the burner is within the second heating amount range and the temperature detected by the temperature sensor exceeds a second reference temperature corresponding to the second heating amount range and being higher than the first reference temperature, so that the heating amount by the burner enters a third heating amount range higher than the second heating amount range. 
     
     
         7 . The combustion heat source device according to  claim 4 , further comprising a circulation pump configured to deliver the fluid to the heat exchanger,
 wherein the controller is configured to operate the circulation pump when the burner is operating, and to continue operating the circulation pump even after the extinguishing condition is satisfied and the burner is extinguished, and   the controller is configured to increase the heating amount by the burner when the heating amount by the burner is within the second heating amount range and the temperature detected by the temperature sensor exceeds a second reference temperature corresponding to the second heating amount range and being higher than the first reference temperature, so that the heating amount by the burner enters a third heating amount range higher than the second heating amount range.