System for and method of consistently emitting a volatile material

• US 8,750,693 B2
• Filed: 08/02/2011
• Issued: 06/10/2014
• Est. Priority Date: 08/02/2010
• Status: Active Grant

• Current Assignee: SC Johnson & Son Incorporated
• Original Assignee: SC Johnson & Son Incorporated
• Inventors: Sharma, Nitin, Tasz, Maciej K., Jones, Ross Peter
• Primary Examiner(s): PELHAM, JOSEPH MOORE
• Application Number:
  US13/196,089
• Publication Number:
  US 20120024975A1
• Time in Patent Office: 1,043 Days
• Field of Search: None
• US Class Current: 392/395
• CPC Class Codes: A01M 1/2044 Holders or dispensers for liquid insecticide, e.g. using wicks
• CPC Class Codes: A61L 9/037 comprising a wick
• CPC Class Codes: A61L 9/127 comprising a wick

Abstract

A system for consistently emitting a volatile material includes a volatile material dispenser having a diffusion element. The system further includes a refill adapted for disposal within the volatile material dispenser and including a container having a volatile material disposed therein and a wick having a first end disposed in contact with the volatile material in the container and a second end extending out of the container. A time constant for (Parameter 4) for the system is less than or equal to about 1.0 hour when estimated using the equation: Predicted mass change=Parameter4+(Parameter3*T)+(Parameter2*exp(−T/Parameter1)).

Claims

1. A system for consistently emitting a volatile material, the system including:

a volatile material dispenser having a diffusion element; and

a refill adapted for disposal within the volatile material dispenser and including a container having a volatile material disposed therein and a wick having a first end disposed in contact with the volatile material in the container and a second end extending out of the container;

wherein a time that it takes a weight loss of the system to reach a steady state weight loss is less than or equal to about 1.0 hour.

2. The system of claim 1, wherein the time it takes the weight loss of the system to turn into steady state is less than or equal to about 0.9 hour.

3. The system of claim 2, wherein the time it takes the weight loss of the system to turn into steady state is less than or equal to about 0.8 hour.

4. The system of claim 1, wherein the wick includes a generally cylindrical stem having a first diameter and a generally disc-shaped evaporation surface disposed at the second end of the wick and having a second diameter that is greater than the first diameter.

5. The system of claim 4, wherein the second diameter is at least twice the first diameter.

6. The system of claim 1, wherein the wick is tapered outwardly between the first end and the second end.

7. The system of claim 1, wherein the wick includes a stem having a length, a width, and a thickness, wherein the thickness is less than the width and an evaporation surface disposed at the second end of the wick and having a width that is greater than the width of the stem.

8. The system of claim 1, wherein the wick includes a capillary tube with the first end disposed in contact with the volatile material and the second end extending out of the container and a hemispherical wick disposed adjacent the second end of the tube.

9. The system of claim 1, wherein the wick includes a plurality of capillary tubes that can be controlled by blocking off or opening up one or more tubes to change an output rate thereof.

10. The system of claim 1, wherein the diffusion element is a heater disposed adjacent the second end of the wick when the refill is inserted into the dispenser to aid in evaporating the volatile material from an evaporation surface of the wick.

11. The system of claim 10, wherein a composition of the volatile material generally remains the same throughout a life of the refill and remains generally the same as an initial refill composition before the refill has been installed within the dispenser.

12. The system of claim 1, wherein the diffusion element is a fan disposed within the dispenser and the wick of the refill is disposed within an air flow path created by the fan when the refill is installed in the dispenser to aid in evaporating volatile material from an evaporation surface of the wick.

13. The system of claim 12, wherein a composition of the volatile material generally remains the same throughout a life of the refill and remains generally the same as an initial refill composition before the refill has been installed within the dispenser.

14. The system of claim 1, wherein the wick includes a capillary tube with a first end disposed in contact with the volatile material and a second end extending out of the container and a hemispherical wick disposed adjacent the second end of the tube.

18. The system of claim 12, wherein the diffusion element is a heater disposed adjacent the second end of the wick when the refill is inserted into the dispenser to aid in evaporating the volatile material from an evaporation surface of the wick.

15. A system for consistently emitting a volatile material, the system including:

a volatile material dispenser having a diffusion element; and

a refill adapted for disposal within the volatile material dispenser and including a container having a volatile material disposed therein and a wick having a first end disposed in contact with the volatile material in the container and a second end extending out of the container;

wherein the system reaches steady state in less than or equal to about 1.0 hour such that a composition of the volatile material when emitted remains substantially the same throughout a life of the refill and remains substantially the same as an initial refill composition before the refill has been installed within a dispenser.

16. The system of claim 15, wherein the system reaches steady state in less than or equal to about 0.8 hour.

17. The system of claim 15, wherein the wick includes a generally cylindrical stem having a first diameter and a generally disc-shaped evaporation surface disposed at the second end of the wick and having a second diameter that is greater than the first diameter and wherein the second diameter is at least twice the first diameter.

19. The system of claim 15, wherein the wick is tapered outwardly between the first end and the second end.

20. The system of claim 15, wherein the wick includes a plurality of capillary tubes that can be controlled by blocking off or opening up one or more tubes to change an output rate thereof.