Combustion control apparatus

Combustion – Timer – programmer – retarder or condition responsive control – By condition of burner feed or feed means

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1374848, F23N 102

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active

043858872

ABSTRACT:
A combustion control apparatus comprises a premix combustion burner requiring primary air, an injector disposed in a primary air passage and including a constricted section having a fixed diameter and length, an enlarged section communicating with the constricted section and a fuel injecting port disposed concentrically with the constricted section and in a predetermined region, and a pressure regulator disposed in a fuel feed passage communicating with the fuel injecting port, the arrangement being such that the pressure regulator is controlled so that the pressure difference between the outlet section of the pressure regulator and the inlet section of the injector may be within the fixed range of the pressure difference produced between the inlet and constricted sections of the injector on the basis of the amount of primary air at the time of the lowest input, thereby maintaining the ratio between the amounts of air and fuel at a constant value and securing combustion stability and high combustion efficiency. Particularly, the apparatus is characterized in that it is highly effective even if the fuel pressure and air pressure are low.

REFERENCES:
patent: 2305975 (1942-12-01), McKinley
patent: 2859807 (1958-11-01), Newman et al.
patent: 2962094 (1960-11-01), Wallace
patent: 3269450 (1966-08-01), Licata et al.
patent: 3404702 (1968-10-01), Telford
patent: 3773071 (1973-11-01), Stang, Jr.
Gas Engineers, Handbook, 1966, Chapter 13, pp. 12/211-12/231.
I.G.E. Journal, Jun. 1965, pp. 470-489.
North American Mfg. Co., Instructions 72.18, Nov. 1965, Bulletin 73.37, Aug. 1966, Bulletin 73.49, Jun. 1966.

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