METHOD FOR PROVIDING THERMAL PULSING THERAPY
A method for providing pulsing contrast therapy to a vehicle occupant. The method comprises first operating a heating device to apply a first temperature for a first period of time and second operating the heating device and a cooling device in an alternating manner for a plurality of time intervals. The thermal pulsing therapy achieves about a 0.5° C. to 2° C. change in a temperature of a surface of a seat and/or about a 0.2° C. to 1.5° C. change in a skin temperature of the vehicle occupant.
1 . A method for providing pulsing thermal therapy to a vehicle occupant, the method comprising:
first operating a heating device to apply a first temperature for a first period of time to bring the temperature of at least one section of the seat surface to about 43° C. to 46° C. and/or to bring a skin temperature of the vehicle occupant in a region of the at least one section to about 36° C. or more; and
second operating the heating device and a cooling device in an alternating manner for a plurality of time intervals, during the plurality of time intervals the heating device is operative for a second period of time, and the cooling device is operative for a third period of time;
wherein the pulsing thermal therapy achieves about a 0.5° C. to 2° C. change in a temperature of a surface of a seat in the at least one section and/or about a 0.2° C. to 1.5° C. change in a temperature of the skin of the vehicle occupant in the region of the at least one section.
2 . The method according to claim 1 , wherein during the plurality of time intervals the heating device and the cooling device effectuate temperature changes in at least one section of the seat surface; wherein the at least one section includes a lower section, a middle section, an upper section, or any combination thereof.
3 . The method according to claim 2 , wherein the heating device is located in the lower and middle sections, and during the plurality of time intervals the heating device located in the lower section is brought to a temperature of about 45 to 55° C. and the heating device located in the middle section is brought to a temperature of about 75° C. to 85° C.
4 . The method according to claim 3 , wherein the heating device is additionally located in the upper section and during the plurality of time intervals, the heating device located in the upper section is brought to a temperature of about 65° C. to 75° C.
5 . The method according to claim 4 , wherein during the plurality of time intervals, the cooling device is brought to a temperature of about 18° C. to 22° C.
6 . The method according to claim 5 , wherein during the plurality of time intervals, the heating device is operated by pulse width modulation with a duty cycle of about 55% to 65% and the cooling device is operated by pulse width modulation with a duty cycle of about 85% to 95%.
7 . The method according to claim 6 , wherein the operating time of the heating device and the cooling device, during the plurality of time intervals, are equal.
8 . The method according to claim 7 , wherein the rate of temperature change during the plurality of time intervals is ±0.16° C./minute to ±0.24° C./minute for the skin temperature and/or ±0.55° C./minute to ±0.62° C./minute for the seat temperature.
9 . The method according to claim 8 , wherein the alternating heating and cooling are respectively characterized by a saw-tooth profile, the saw-tooth profile of heating being inverse to the saw-tooth profile of cooling.
10 . The method according to claim 9 , wherein there is no idle period between the alternating operation of the heating device and the cooling device; wherein the idle period is characterized by a period of time in which both the heating device and the cooling device are not operational.
11 . The method according to claim 10 , wherein there is no dwell period between alternating operation of the heating device and the cooling device; wherein the dwell period is characterized by a period of time in which the heating device or the cooling device maintains a given temperature.
12 . The method according to claim 11 , wherein the second period of time is about 1 to 2 minutes; and wherein the third period of time is about 1 to 2 minutes.
13 . The method according to claim 12 , wherein the plurality of time intervals include 8 to 18 time intervals.
14 . The method according to claim 1 , wherein the heating device is operated by pulse width modulation with a duty cycle of about 55% to 65% to realize the first temperature.
15 . The method according to claim 14 , wherein the first temperature is about 40° C. to 90° C.
16 . The method according to claim 15 , wherein the first period of time is about 2 to 5 minutes.
17 . The method according to claim 1 , wherein the pulsing thermal therapy is adapted to relieve pain of the vehicle occupant.
18 . A device for performing the method according to claim 1 , the device comprising: the heating device located in an upper section of the seat, a middle section of the seat, and a lower section of the seat; and a cooling device acting upon the middle section of the seat.
19 . The device according to claim 18 , wherein the heating device comprises a resistance element; and the cooling device comprises a blower, a thermoelectric device, a fluid distribution device, or any combination thereof; and wherein the heating device in the lower section has a surface power density of about 2,100 W/m 2 to 2,500 W/m 2 , the heating device in the middle section has a surface power density of about 1,900 W/m 2 to 2,300 W/m 2 , and the heating device in the upper section has a surface power density of about 900 W/m 2 to 1,500 W/m 2 .
20 . A vehicle seat comprising the device according to claim 18 .