HVAC fragrance system
First Claim
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1. A system for injecting a fragrance into an airstream of an HVAC unit, the system comprising:
- a structure configured to receive one or more fragrance sources;
a fragrance system fan coupled to the structure and configured for attachment to ductwork of the HVAC unit such that the fragrance system fan is outside of the airstream of the HVAC unit, the fragrance system fan configured to move air past an active fragrance source of the one or more fragrance sources and then into the airstream of the HVAC unit; and
a controller module including a user interface for receiving user input including a desired fragrance intensity level, the controller module configured to (i) receive an airflow input signal that indicates an amount of airflow in the airstream of the HVAC unit, (ii) determine a fragrance system fan speed signal in ratio to the airflow input signal and based on the desired fragrance intensity level, (iii) output the determined fragrance system fan speed signal to control a speed of the fragrance system fan, and (iv) periodically automatically adjust the fragrance system fan speed signal in response to a change of the airflow input signal or a change of the desired fragrance intensity level.
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Abstract
Fragrance systems are provided that can be used in conjunction with heating, ventilation, and air-conditioning systems. The fragrance systems can inject a fragrance into an airstream that is supplied to a space such as a room of a building or a vehicle cabin. In some embodiments, the speed a fan of the fragrance system can be automatically modulated in a pre-determined relationship to the speed of a fan of the HVAC system. Accordingly, a desired level of fragrance can be automatically maintained as desired within the airstream that is supplied to the space, even when the HVAC fan speed or other conditions fluctuate.
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Citations
16 Claims
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1. A system for injecting a fragrance into an airstream of an HVAC unit, the system comprising:
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a structure configured to receive one or more fragrance sources; a fragrance system fan coupled to the structure and configured for attachment to ductwork of the HVAC unit such that the fragrance system fan is outside of the airstream of the HVAC unit, the fragrance system fan configured to move air past an active fragrance source of the one or more fragrance sources and then into the airstream of the HVAC unit; and a controller module including a user interface for receiving user input including a desired fragrance intensity level, the controller module configured to (i) receive an airflow input signal that indicates an amount of airflow in the airstream of the HVAC unit, (ii) determine a fragrance system fan speed signal in ratio to the airflow input signal and based on the desired fragrance intensity level, (iii) output the determined fragrance system fan speed signal to control a speed of the fragrance system fan, and (iv) periodically automatically adjust the fragrance system fan speed signal in response to a change of the airflow input signal or a change of the desired fragrance intensity level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification