| 摘要 |
PURPOSE: To reduce noises by disposing a muffler insert in the region of an exhaust gas exhaust port and deviding exhaust gas flow into parts flows, in a heater to discharge high temperature combustion gas generated in a combustion chamber provided with a burner after passing the gas through a heat exchanger surrounding the burner. CONSTITUTION: A heater 1 for an automobile is provided with a spray type burner having a fuel injection body 2, and a vortex body 3 is disposed at a given distance from the fuel injection body 2. A burner insert 5 is disposed in the downstream of the vortex body 3, intruded into a combustion chamber 7 consisting of combustion pipes 6. The combustion pipe 6 is surrounded by a heat exchanger 8, and the heat exchanger 8 is surrounded with an external casing 9. Combustion gas generated in the combustion chamber 7 flows through a space 18 between the combustion pipes 6 and the heat exchanger 8 and flows out through an exhaust gas exhaust port 12. In this case, a muffler insert 13 having two hollow bodies 14 is disposed in the discharge port 12, to achieve in particular, silencing of low frequency combustion noise. |
