| 摘要 |
PCT No. PCT/SE88/00060 Sec. 371 Date Aug. 16, 1989 Sec. 102(e) Date Aug. 16, 1989 PCT Filed Feb. 16, 1988 PCT Pub. No. WO88/06254 PCT Pub. Date Aug. 25, 1988.An infra-red radiator comprises a ventilated body structure (10) having a cross-web (12), a central leg (14), two side legs (16) and two intermediate support legs (18). Stretched between the legs (14, 16) are two reflectors (24) made of a flexible metal foil material and located in front of IR-lamps (26). Located between reflectors and body structure are ventilating hollows or cavities (36, 38) and channels (40, 57), for cooling or ventilation air, are incorporated in the legs. Inlet channels (40) have upper openings (44) which project cooling air flow along with the rearwardly located surface of the reflector (24), and lower openings (46) which project cooling air flow (52) along the reflector surface located between the reflector (24) and lamp (26). Turbulent cooling air (58) flows in the hollows (36, 38) behind the reflector (24) and passes from inlet openings (54), via laterally offset channels (46) in the support legs (18), to the outlet channels (57) and is exhausted, via openings (50), in the form of a jet or pilot flow (68) which, as a result of an ejector effect, accelerates and amplifies the cooling air flow (52). |
