Combustion apparatus

A combustion apparatus comprising,

• a burner constituted by a burner body an inside of which an air-fuel mixture is supplied to and one surface of which is made into an open surface, and a combustion plate covering the open surface of the burner body;
• and
• a combustion box enclosing a combustion space of the air-fuel mixture ejecting from the combustion plate,
• wherein an ignition electrode(s) faced to the combustion plate is mounted on a predetermined side plate of the combustion box and a swelling part, an inside of which becomes an inflow chamber of the air-fuel mixture and which swells in a direction away from the combustion plate, is provided with a part of an opposite wall of the burner body, which opposes to the combustion plate at a distance, and
• wherein on a premise that a direction from the predetermined side plate of the combustion box to a side plate, opposite to the predetermined side plate, of the combustion box is a predetermined direction, the air-fuel mixture is configured to flow in the inflow chamber with a direction component to the predetermined direction,
• wherein:
• an offset part that is positioned at a portion which is away from the swelling part in an inflow direction of the air-fuel mixture to the inflow chamber and does not oppose to a tip part(s) of the ignition electrode(s) through the combustion plate is provided with the opposite wall of the burner wall and the offset part offsets to a combustion-plate side so that a distance between the offset part and the combustion plate is shorter than that between the combustion plate and a general part of the opposite wall except the swelling part and the offset part.