| 摘要 |
An apparatus 10 for providing a continuous slow release of compressed gas includes a pressure vessel 12 and a restrictor tube 16. The restrictor tube 16 has a first open end 18 located inside the pressure vessel 12 and an opposite second open end 20 located outside the pressure vessel 12. The restrictor tube has a small diameter so as to restrict the flow of gas therethrough and out of the pressure vessel 12. Pressure vessel 12 is connected to a supply of compressed gas via a valve 28. When a volume of gas is transferred to the vessel 12 via valve 28, the gas enters the first opening 18, travels through the restrictor tube 16 and out of the second opening 20 to provide a slow continuous release of gas. In one embodiment, the pressure vessel 12 is incorporated in an insect trap 30. The trap 30 also includes a light source 48 of emitting light that attracts insects and a solution tray 44 for holding the liquid in which insects can become entrapped and drowned. The liquid may also include various chemicals that act as attractants to the insects. A fan 44 circulates air and the gas released by pressure vessel 12 through housing 32 of the insect trap 30. The circulation is in a direction so as to cause a downdraft in the vicinity of an opening 36 through the housing 32. The downdraft is directed to the selection tray 44 to assist in blowing insects into the tray 44. The gas released by the vessel 12 acts to asphyxiate the insects.
|
