Moisture abatement in heating operation of climate controlled systems

Patent metadata

Field	Value
Publication number	US-9989267-B2
Application number	US-201313763563-A
Country	US
Kind code	B2
Filing date	Feb 8, 2013
Priority date	Feb 10, 2012
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

Embodiments related to moisture abatement during a heating operation of a climate control system are disclosed. In some embodiments, the climate control system includes a thermoelectric device (TED) or other thermal condition device having a hot side and a cold side. In certain embodiments, the thermal conditioning device is operated (e.g., by a processor or a condensate switch) to inhibit or prevent the occurrence of condensation, and/or to abate condensation that has already occurred, on the cold side of the thermal conditioning device during the heating operation.

First claim

The following is claimed:

1. A climate control system configured to operate in a heating mode, the system comprising:
a housing defining an interior space, the housing comprising an inlet and an outlet;
a thermal conditioning device positioned in the interior space and having a main surface and a waste surface, the main surface configured to condition fluid passing through the interior space, wherein the waste surface is at a temperature less than a temperature of the main surface during the heating mode;
a fluid transfer device comprising a plurality of blades, the fluid transfer device configured to selectively transfer fluid from the inlet to the outlet of the housing, wherein fluid passing through the interior space of the housing is heated by the main surface when the thermal conditioning device is activated;
a humidity sensor configured to measure a humidity at the waste surface of the thermal conditioning device; and
a processor configured to receive a humidity reading from the humidity sensor and to control electrical power supplied by a power source;
wherein, when the system is operating in the heating mode and the humidity reading is equal to or greater than a humidity threshold, power supplied to the thermal conditioning device is reduced; and
wherein, when the system is operating in the heating mode and the humidity reading is less than the humidity threshold, power supplied to the thermal conditioning device is increased or maintained.

2. The system of claim 1 , wherein the thermal conditioning device comprises a thermoelectric device or another heating and cooling device.

3. The system of claim 1 , wherein the thermal conditioning device comprises a convective heater or another heating device.

4. The system of claim 1 , wherein the humidity reading is a relative humidity reading.

5. The system of claim 1 , wherein the humidity threshold is between 85% and 95% relative humidity.

6. The system of claim 1 , wherein the humidity threshold is 90% relative humidity.

7. The system of claim 1 , wherein, when the system is operating in heating mode and the humidity reading is equal to or greater than the humidity threshold, the power supplied to the thermal conditioning device is reduced to a 50% duty cycle.

8. The system of claim 1 , wherein, when the system is operating in heating mode and the humidity reading is less than the humidity threshold, the power supplied to the thermal conditioning device is increased to a 100% duty cycle or maintained at a 100% duty cycle.

9. The system of claim 1 , further comprising a separator gasket positioned proximate to the outlet of the housing, the separator gasket configured to wick condensate from the waste surface of thermal conditioning device.

10. The system of claim 1 , wherein the outlet of the housing is configured to direct the heated fluid to a climate controlled assembly or compartment.

11. A method of controlling a climate control system, the method comprising:
providing a climate control system configured to operate in a heating mode, the climate control system comprising:
a thermal conditioning device positioned in an interior space of a housing and having a main surface and a waste surface, the main surface configured to condition fluid passing through the interior space, the waste surface being configured to achieve a temperature less than a temperature of the main surface during the heating mode;
a fluid transfer device configured to selectively transfer fluid across, through a portion of the thermal conditioning device, wherein fluid passing through the interior space of the housing is heated by the main surface when the thermal conditioning device is activated;

operating the climate control system in the heating mode;
detecting a relative humidity at the waste surface of the thermal conditioning device;
comparing the relative humidity to a threshold humidity value; and
reducing an amount of power supplied to the thermal conditioning device when the relative humidity is equal to or greater than the threshold humidity value; and
increasing or maintaining the amount of power supplied to the thermal conditioning device when the relative humidity is less than the threshold humidity value.

12. The method of claim 11 , wherein measuring the relative humidity comprises measuring the relative humidity with a humidity sensor.

13. The method of claim 11 , wherein reducing the amount of power supplied to the thermal conditioning device is accomplished by decreasing a duty cycle of the thermal conditioning device.

14. The method of claim 11 , wherein increasing or maintaining the amount of power supplied to the thermal conditioning device is accomplished by increasing or maintaining a duty cycle of the thermal conditioning device.

15. The method of claim 11 , wherein reducing the amount of power supplied to the thermal conditioning device comprises decreasing the amount of power by 50%.

16. The method of claim 11 , wherein reducing the amount of power supplied to the thermal conditioning device comprises substantially eliminating power to the thermal conditioning device.

17. The method of claim 11 , wherein the method does not include measuring a temperature.

18. The method of claim 11 , wherein the method does not include determining a dew point.

19. The method of claim 11 , wherein the waste surface is in thermal communication with a waste side heat exchanger of the thermal conditioning device.

20. The method of claim 11 , wherein the thermal conditioning device comprises a thermoelectric device.

21. The method of claim 11 , further comprising directing fluid heated by the main side of the thermal conditioning device to a climate controlled assembly or compartment.

22. A climate control system configured to operate in a heating mode, the system comprising:
a housing defining an interior space, the housing having an inlet and an outlet;
a thermal conditioning device positioned in the interior space and having a main side and a waste side, the main side configured to condition fluid passing through the interior space, wherein the waste side is at a temperature less than a temperature of the main side during the heating mode;
a fluid transfer device configured to selectively transfer fluid from the inlet to the outlet of the housing, wherein fluid passing through the interior space of the housing is heated by the main side when the thermal conditioning device is activated; and
a condensate switch configured to toggle between a first state and a second state, the first state being when condensation is detected at a level greater than or equal to a threshold and the second state being when condensation is not detected at a level greater than or equal to the threshold, wherein the condensate switch is located on the waste side;
wherein, when the condensate switch is in the first state and the system is operating in the heating mode, the condensate switch is configured to interrupt power supplied to the thermal conditioning device.

23. The system of claim 22 , wherein, when the condensate switch interrupts power supplied to the thermal conditioning device, an amount of power is supplied to the thermal conditioning device that is less than the power supplied to the thermal conditioning device when the condensate switch is in the second state.

24. The system of claim 22 , wherein, when the condensate switch interrupts power supplied to the thermal conditioning device, the powe

Assignees

• Gentherm Inc

Inventors

• Brykalski Michael
• Marquette David

Classifications

• B60N2/5635

  coming from the passenger compartment · CPC title

• B60N2/5692

  Refrigerating means · CPC title

• F24F5/0042

  characterised by the application of thermo-electric units or the Peltier effect · CPC title

• H05B1/0238

  For seats · CPC title

• F24H3/0429

  For vehicles · CPC title