| 摘要 |
A heating, ventilating and air conditioning (HVAC) return air system actuator device which could, among other things, be employed to notify a user of a clogged air filter and/or disperse a fragrance into a forced air HVAC system is disclosed. In one embodiment the actuator device has a movable actuator mounted within a housing. The movable actuator moves in response to a user pre-set pressure differential. When the pre-set pressure differential is reached, the movable actuator impacts a lever which activates a switch. The switch could be connected to a host of items such as a light emitting device to notify the user to a clogged air filter condition and/or to activate a pump to release a fragrance into the HVAC system. |
