초록 ▼

Disclosed RH generators include a lower component having a first chamber and an upper component including a second chamber, the upper component being coupled to the lower component to couple the first chamber to the second chamber. The first chamber is configured to contain liquid water and generate

Disclosed RH generators include a lower component having a first chamber and an upper component including a second chamber, the upper component being coupled to the lower component to couple the first chamber to the second chamber. The first chamber is configured to contain liquid water and generate 100% RH, while the second chamber is configured to contain salt and generate a second RH less than 100% RH. A first membrane is positioned between the first chamber and the second chamber to allow water vapor to pass between the first and second chambers while blocking liquid water, the salt, and other larger molecules. The upper component is couplable to an RH probe with a second membrane separating the second chamber from the RH probe, which allows water vapor to pass between the second chamber and the RH probe to expose the RH probe to the second RH.

대표청구항 ▼

1. A relative humidity (RH) generator comprising: a lower component having a first chamber having an upper opening and being configured to contain liquid water and generate a first RH within the first chamber;an upper component including a second chamber having an upper opening and a lower opening,

1. A relative humidity (RH) generator comprising: a lower component having a first chamber having an upper opening and being configured to contain liquid water and generate a first RH within the first chamber;an upper component including a second chamber having an upper opening and a lower opening, the upper component being coupled to the lower component to couple the upper opening of the first chamber to the lower opening of the second chamber, the second chamber being configured to contain salt and generate a second RH within the second chamber; wherein the second RH is predetermined based on the salt positioned in the second chamber; anda first membrane positioned between the first chamber and the second chamber to allow water vapor to pass between the first and second chambers through the first membrane;wherein the upper component is adapted to be coupled to an RH probe with a second membrane separating the upper opening of the second chamber from the RH probe, such that the second membrane allows water vapor to pass between the second chamber and an RH sensor of the RH probe to thereby expose the RH sensor to the second RH;wherein the RH generator is operable to distill ordinary tap water from the first chamber into to purified water vapor that passes through the first membrane; andwherein the second RH is lower than the first RH, and the RH generator is operable to distill water by causing water vapor from the first chamber to diffuse through the first membrane into the second chamber due to difference between the first RH and the second RH. 2. The RH generator of claim 1, wherein the RH generator is operable to generate and maintain the second RH at the predetermined value in the second chamber when the water in the first chamber is ordinary tap water. 3. The RH generator of claim 1, wherein the first membrane does not allow liquid water or the salt to pass through the first membrane. 4. The RH generator of claim 1, wherein the first membrane does not allow molecules substantially larger than water molecules to pass through the first membrane. 5. The RH generator of claim 1, wherein the second membrane is secured to the upper component and covers the upper opening of the second chamber. 6. The RH generator of claim 1, wherein the first membrane comprises polytetrafluoroethylene (PTFE). 7. The RH generator of claim 1, wherein the first chamber has a lower opening for adding water into the first chamber, and the RH generator includes a removable plug that seals the lower opening of the first chamber. 8. The RH generator of claim 1, wherein the lower component is identical to the upper component. 9. The RH generator of claim 1, wherein the lower component includes a first connection feature on its upper surface and the upper component includes a second connection feature on its lower surface, and the first and second connection features are configured to mate together to attach the lower component to the upper component. 10. The RH generator of claim 9, wherein the upper component includes a third connection feature on its upper surface for securing the RH generator to an RH probe. 11. The RH generator of claim 9, wherein the first and second connection features include corresponding concentric rims and recesses, wherein the rims insert into the recesses using to attach the lower component to the upper component. 12. The RH generator of claim 1, wherein the upper component includes an air vent hole that extends from the second chamber through the upper component to the external ambient environment. 13. The RH generator of claim 1, wherein the upper component comprises two or more separate chambers each configured to contain a different salt for generating different RH values, wherein the generator can be adjusted to two or more corresponding positions to put the first chamber in vapor communication with the each of the two or more separate chambers of the upper component, one at a time. 14. A relative humidity (RH) generator comprising: a lower component having a first chamber having an upper opening and being configured to contain liquid water and generate a first RH within the first chamber;an upper component including a second chamber having an upper opening and a lower opening, the upper component being coupled to the lower component to couple the upper opening of the first chamber to the lower opening of the second chamber, the second chamber being configured to contain salt and generate a second RH within the second chamber; wherein the second RH is predetermined based on the salt positioned in the second chamber; anda first membrane positioned between the first chamber and the second chamber to allow water vapor to pass between the first and second chambers through the first membrane;wherein the upper component is adapted to be coupled to an RH probe with a second membrane separating the upper opening of the second chamber from the RH probe, such that the second membrane allows water vapor to pass between the second chamber and an RH sensor of the RH probe to thereby expose the RH sensor to the second RH; andwherein the first chamber has a lower opening for adding water into the first chamber, and the RH generator includes a removable plug that seals the lower opening of the first chamber. 15. The RH generator of claim 14, wherein the upper component comprises two or more separate chambers each configured to contain a different salt for generating different RH values, wherein the generator can be adjusted to two or more corresponding positions to put the first chamber in vapor communication with the each of the two or more separate chambers of the upper component, one at a time. 16. The RH generator of claim 14, wherein the RH generator is operable to generate and maintain the second RH at the predetermined value in the second chamber when the water in the first chamber is ordinary tap water. 17. The RH generator of claim 14, wherein the lower component includes a first connection feature on its upper surface and the upper component includes a second connection feature on its lower surface, and the first and second connection features are configured to mate together to attach the lower component to the upper component. 18. A relative humidity (RH) generator comprising: a lower component having a first chamber having an upper opening and being configured to contain liquid water and generate a first RH within the first chamber;an upper component including a second chamber having an upper opening and a lower opening, the upper component being coupled to the lower component to couple the upper opening of the first chamber to the lower opening of the second chamber, the second chamber being configured to contain salt and generate a second RH within the second chamber; wherein the second RH is predetermined based on the salt positioned in the second chamber; anda first membrane positioned between the first chamber and the second chamber to allow water vapor to pass between the first and second chambers through the first membrane;wherein the upper component is adapted to be coupled to an RH probe with a second membrane separating the upper opening of the second chamber from the RH probe, such that the second membrane allows water vapor to pass between the second chamber and an RH sensor of the RH probe to thereby expose the RH sensor to the second RH; andwherein the upper component comprises two or more separate chambers each configured to contain a different salt for generating different RH values, wherein the generator can be adjusted to two or more corresponding positions to put the first chamber in vapor communication with the each of the two or more separate chambers of the upper component, one at a time. 19. The RH generator of claim 18, wherein the RH generator is operable to generate and maintain the second RH at the predetermined value in the second chamber when the water in the first chamber is ordinary tap water. 20. The RH generator of claim 18, wherein the lower component includes a first connection feature on its upper surface and the upper component includes a second connection feature on its lower surface, and the first and second connection features are configured to mate together to attach the lower component to the upper component.