Climate control method for hybrid vehicles using thermoelectric devices

• US 7,870,892 B2
• Filed: 06/02/2008
• Issued: 01/18/2011
• Est. Priority Date: 05/10/2004
• Status: Active Grant

• Current Assignee: Gentherm Incorporated
• Original Assignee: BSST LLC (Gentherm Incorporated)
• Inventors: Gawthrop, Peter R.
• Primary Examiner(s): Ford; John K
• Application Number:
  US12/131,853
• Publication Number:
  US 20080230618A1
• Time in Patent Office: 960 Days
• Field of Search: 165/271, 165/202, 165/42, 165/43, 180/65.1, 180/65.21, 180/65.8, 62/32, 62/33, 62/36.1, 62/37, 622/44
• US Class Current: 165/271
• CPC Class Codes: B60H 1/00007 Combined heating, ventilating, or cooling devices control systems or mechanisms B60H1/00642
• CPC Class Codes: B60H 1/004 for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles
• CPC Class Codes: B60H 1/00478 Air-conditioning devices using the Peltier effect for air-conditioning in general F24F5/0042; for refrigeration F25B21/02; electric devices exhibiting the Peltier effect H10N10/00
• CPC Class Codes: B60H 1/00885 Controlling the flow of heating or cooling liquid, e.g. valves or pumps B60H1/00899 takes precedence; constructions of valves B60H1/00485
• CPC Class Codes: B60H 1/12 using an air blower
• CPC Class Codes: B60H 2001/2234 when vehicle is parked, preheating
• CPC Class Codes: B60H 2001/2237 supplementary heating, e.g. during stop and go of a vehicle
• CPC Class Codes: B60H 2001/224 automatic operation, e.g. control circuits or methods
• CPC Class Codes: F25B 21/04 reversible

Abstract

The present invention provides a system for controlling the climate of a hybrid vehicle. The system includes a thermoelectric module, a heat exchanger, a pump, and a valve. The thermoelectric module includes thermoelectric elements powered by electric energy. The thermoelectric elements emit or absorb heat energy based on the polarity of the electrical energy provided. A tube containing coolant runs proximate the thermoelectric elements. To aid in the transfer of heat energy, a blower is provided to generate an air flow across the thermoelectric elements and the tube. The coolant is provided from the thermoelectric module to a heat exchanger that heats or cools the air flow provided to the cabin of the vehicle. The pump and valve are in fluid communication with the heat exchanger and thermoelectric module. The pump pressurizes the coolant flow through the tube and coolant lines. In a cooling mode, the valve is configured to selectively bypass the engine coolant system of the vehicle.

Claims

1. A method for controlling the interior climate of a hybrid vehicle having an engine and an engine coolant system, the method comprising the steps of:

supplying electrical energy to at least one thermoelectric element of a thermoelectric module to generate a temperature change;

pumping coolant through a coolant tube in thermal communication with the thermoelectric module;

blowing air across the thermoelectric element and the coolant tube to create a change of temperature of the coolant in the coolant tube;

receiving the coolant in a heat exchanger;

creating an air flow across the heat exchanger;

receiving the air flow over an evaporator to supplement cooling in a cooling mode;

receiving the air flow over a heater core to supplement heating in a heating mode;

in a cooling mode, selectively isolating the coolant in the coolant tube from coolant in the engine coolant system; and

in a heating mode, selectively coupling the coolant in the coolant tube with the engine coolant system.

2. The method of claim 1, wherein in the cooling mode the engine is off.

3. The method of claim 1, wherein in the cooling mode the engine is on.

4. The method of claim 1, wherein in the heating mode the engine is off.

5. The method of claim 1, wherein in the heating mode the engine is on.

6. The method of claim 1, wherein the step of supplying electrical energy provides the electrical energy in a first polarity during the heating mode and in a second polarity during the cooling mode.

7. The method according to claim 1, further comprising the step of directing energy from a regenerative braking system to the thermoelectric module to generate a temperature change.