Methods and apparatuses for manipulating temperature
Methods and apparatuses for manipulating the temperature of a surface are provided. Devices of the present disclosure may include a thermal adjustment apparatus, such as a controller in electrical communication with one or more thermoelectric materials, placed adjacent to the surface of skin. The device may generate a series of thermal pulses at the surface, for providing an enhanced thermal sensation for a user. The thermal pulses may be characterized by temperature reversibility, where each pulse includes an initial temperature adjustment, followed by a return temperature adjustment, over a short period of time (e.g., less than 120 seconds). The average rate of temperature change upon initiation and upon return may be between about 0.1° C./sec and about 10.0° C./sec. In some cases, the average rate of the initial temperature adjustment is greater in magnitude than the average rate of the return temperature adjustment.
1. A method of manipulating a temperature of an external skin surface of a user, the method comprising:
generating a plurality of thermal pulses in succession at the external skin surface of the user, wherein the plurality of thermal pulses cycle a temperature at the external skin surface between at least a first temperature and a second temperature, wherein the plurality of thermal pulses include a first temperature adjustment from the first temperature to the second temperature at an average rate of temperature change between 0.1° C./sec and 10.0° C./sec over a first time period between 1 second and 10 seconds, and a second temperature adjustment from the second temperature to the first temperature over a second time period longer than the first time period, and wherein a difference in magnitude between the first temperature and the second temperature is less than 10° C.
2. The method of claim 1 , wherein the second temperature adjustment exhibits relaxation decay.
3. The method of claim 1 , wherein each of the thermal pulses occurs over a total time period greater than 60 seconds and less than or equal to 120 seconds.
4. The method of claim 1 , wherein the difference in magnitude between the first temperature and the second temperature is less than 5° C.
5. The method of claim 1 , wherein the first temperature and the second temperature are different from an initial surface temperature.
6. The method of claim 1 , wherein the average rate of the first temperature adjustment is between approximately 0.5° C./sec and 1° C./sec.
7. A method of manipulating temperature of an external skin surface of a user, the method comprising:
generating a plurality of thermal pulses in succession at the external skin surface of the user, wherein the plurality of thermal pulses cycle between at least a first temperature and a second temperature, wherein the external skin surface is a wrist or a neck of the user, wherein the plurality of thermal pulses include a first temperature adjustment from the first temperature to the second temperature at an average rate of temperature change between 0.1° C./sec and 10.0° C./sec over a first time period between 1 second and 30 seconds, and a second temperature adjustment from the second temperature to the first temperature over a second time period longer than the first time period, wherein the second temperature adjustment exhibits relaxation decay, and wherein a difference in magnitude between the first temperature and the second temperature is less than 10° C.
8. The method of claim 7 , wherein each of the thermal pulses occurs over a total time period greater than 60 seconds and less than or equal to 120 seconds.
9. The method of claim 7 , wherein the difference in magnitude between the first temperature and the second temperature is less than 5° C.
10. The method of claim 7 , wherein the first temperature and the second temperature are different from an initial surface temperature.
11. The method of claim 7 , wherein the average rate of the first temperature adjustment is between approximately 0.5° C./sec and 1° C./sec.