Heating device, particularly automotive heating device, with an

Details Heating device, particularly automotive heating device, with an Heating device, particularly automotive heating device, with an

1988-04-19

1990-05-08

Fuller, B. R.

Acoustics

Sound-modifying means

Combined

181231, 181250, 181252, 181258, 181270, 136116R, F01N 500

Patent

active

049230336

ABSTRACT:
A heating device, particularly an automotive heating device, in which a noise muffling device is integrated within the heating device. The muffler can be provided in the combustion pipe defining the combustion chamber, or the combustion pipe, itself, can be designed as the muffler. The muffler operates by absorption and/or reflection sound muffling techniques in accordance with various embodiments, and may, simultaneously, purify the combustion gases, for example, by catalytic afterburning, and/or by filtering of soot particles. The muffler is arranged in a hot zone, but not in the flame area of the combustion chamber, to achieve a self-cleaning action. In other embodiments, noise muffling material is arranged in an exhaust gas collection chamber to achieve sound muffling based on reflection and/or absorption and/or other conventional sound reduction methods. In all cases, the need for an external muffler in the exhaust line from the heating device is eliminated.

REFERENCES:
patent: 2404617 (1946-07-01), Budlave
patent: 2452779 (1948-11-01), McCollum
patent: 2482987 (1949-09-01), McCollum
patent: 3092206 (1963-06-01), Moreau
patent: 3556734 (1971-01-01), Peterson
patent: 3989029 (1976-11-01), Friedl et al.
patent: 4015683 (1977-04-01), Williams
patent: 4350223 (1982-09-01), Takei
patent: 4408679 (1983-11-01), Lattrell
patent: 4601168 (1986-07-01), Harris

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