| 摘要 |
An easily installed economical device to control in residence kitty litter odor can be constructed using an existing dryer vent system. When the cat enters the litter box enclosure, a sensor detects the cat's presence. The detector control circuits turn on a small fan to vent the obnoxious odor out through the dryer vent. The vent fan continues to operate for an adjustable set time period to insure all the odor is vented.
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