| 摘要 |
PURPOSE:To inexpensively impart a lot of infrared irradiation to a fluid with high efficiency by inserting a spiral body into a radiation tube for irradiating the fluid circulating in the tube by far infrared radiation to swirl the circulating fluid. CONSTITUTION:The radiation tube 6 having an opening on the upstream and downstream sides of a fluid and used for irradiating the fluid circulating in the tube by far infrared radiation is arranged in a fluid passage in the circulating direction of the fluid. The spiral body 7 is inserted into the radiation tube 6 to swirl the fluid. The resistance quantity to the fluid flow is remarkably reduced as compared with the conventional one packed with ceramic particles, hence a lot of infrared radiation can be projected on the fluid with high efficiency, and the cost is considerably reduced. |
