| 摘要 |
A gas combustion-powered apparatus, comprising: a first chamber; a rotatable fan located in said first chamber; ignition means in operable relationship to said first chamber to ignite a combustible gas; a second chamber; first communication means between said first chamber and said second chamber and downstream of said fan, said first communication means constructed and arranged for enabling passage of an ignited gas jet from said first chamber to said second chamber; at least one intake port located on a wall of said first chamber upstream of said rotatable fan; and at least one bypass port for enabling communication between said first chamber and said second chamber, separate from said first communication means, and located on said wall or said first chamber downstream of said rotatable fan.
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