| 摘要 |
Method and apparatus for controlling bacterial growth in a fluid by treatment thereof with bactericidal radiation wherein the fluid, such as, water, is used as a coolant for a source (3) of radiation e.g. ultraviolet light but has a flow rate which is insufficient to maintain the source (3) at a sufficiently low working temperature for the generation of bacteriacidal radiation thereby, wherein the apparatus comprises a radiation source (3) which is capable of generating bactericidal radiation at a given working temperature or within a given working temperature range and is arranged to enable the fluid to be treated with bacteriacidal radiation and to effect cooling of the source (3) and where in the apparatus further comprises means (20) e.g. timer circuit, arranged to operate the radiation source intermittently to maintain its working temperature at a given temperature or within a given temperature range at which bacteriacidal radiation is generated thereby. The invention has particular application in humidification systems for serve-over, point-of-sale food and/or floral display cabinets. |
