Oil combustion type infrared ray generating apparatus

An oil combustion type infrared ray generating apparatus comprising

• a fuel tank composed of a vessel having a flat upper surface,
• a frustoconical-shaped furnace body having an excellent heat insulating and refractory property and provided at its upper wall with an outlet opening and at its side wall with an inlet opening,
• a pressure oil jet burner provided with a blower and connected to said inlet opening in the side wall of said furnace body,
• said furnace body and pressure oil jet burner with said blower being mounted side by side on said flat upper surface of said fuel tank,
• a red heat cylindrical body erected vertically from an upper part of said furnace body and formed of refractory material, said red heat cylindrical body being permeable to gas and connected to said outlet opening in the upper wall of said furnace body,
• said furnace body being formed of material which is low in strength and easily deformable under load, but with said excellent refractory and heat reflecting property and includes a fluid supply pipe of said burner being freely inserted into said inlet opening in the side wall of said furnace body with a radial gap formed adjacent and therebetween so as to connect said burner to said furnace body, means for causing a part of flow of compressed air delivered from the blower of said burner to flow through said gap, and
• said outlet opening in the upper wall of said furnace body having a diameter which is smaller than the inner diameter of said red heat cylindrical body such that combustion gas flowing out of the furnace body through said outlet opening produces a negative pressure around the periphery of said outlet opening preventing leakage between the furnace body and the red-heat cylinder.