WARM AIR HEATER

摘要

An orifice 26 is provided in an air supply passage 5a of a warm air heater 100, and a differential pressure sensor 28 detects differential pressure Δp between front and rear of the orifice 26 in the air supply passage 5a. Rotation speed of the combustion fan 24 is corrected on the basis of the differential pressure Δp detected by the differential pressure sensor 28.

主权项

1. A warm air heater comprising:
a burner which is disposed in a combustion chamber; a fuel supply unit which supplies fuel gas to the burner; an air supply passage which communicates the combustion chamber with outdoors; a combustion fan which is disposed in the air supply passage, and supplies air in the outdoors to the combustion chamber through the air supply passage; an orifice which is provided in the air supply passage; a differential pressure detection unit which detects differential pressure between front and rear of the orifice in the air supply passage; a combustion control unit which rotates the combustion fan based on target combustion quantity of the burner, and causes the fuel supply unit to supply the fuel gas to allow the burner to burn; and a correction unit which corrects rotation speed of the combustion fan based on the differential pressure detected by the differential pressure detection unit.