Exhaust purification device burner

A burner for an exhaust purification device, comprising:

• a tubular flame stabilizer having a space including a combustion area, in which air-fuel mixture of fuel and air is combusted, an ejection port for ejecting combustion gas, a small diameter portion, and a large diameter portion having an inner diameter larger than the small diameter portion;
• a tubular cover that surrounds the flame stabilizer, wherein a gap is formed between an inner circumference face of the cover and an outer circumference face of the flame stabilizer;
• an exhaust pipe connected to the cover to deliver exhaust gas into the gap;
• and
• a partition portion arranged in the gap to partition the gap into an upstream exhaust chamber and a downstream exhaust chamber, wherein the partition portion is arranged between an outer circumference face of the large diameter portion and the inner circumference face of the cover in the gap, wherein
• the upstream exhaust chamber is connected to the exhaust pipe and the downstream exhaust chamber, and
• the downstream exhaust chamber is connected to the ejection port of the flame stabilizer.