Temperature control system with thermoelectric device

• US 9,038,400 B2
• Filed: 05/18/2010
• Issued: 05/26/2015
• Est. Priority Date: 05/18/2009
• Status: Active Grant

• Current Assignee: Gentherm Incorporated
• Original Assignee: Gentherm Incorporated
• Inventors: Goenka, Lakhi Nandlal
• Primary Examiner(s): Tyler, Cheryl J
• Assistant Examiner(s): Aviles Bosques, Orlando E
• Application Number:
  US12/782,569
• Publication Number:
  US 20100287952A1
• Time in Patent Office: 1,834 Days
• Field of Search: 62/36.1, 62/33, 62/32, 62/31, 62/36, 237/12.3 R, 237/12.4
• US Class Current: 62/3.61
• CPC Class Codes: B23P 19/00 Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation connecting metal parts or objects by metal-working procedures B21J, B23K; Tools or devices therefor so far as not provided for in other classes hand tools in general B25
• CPC Class Codes: B60H 1/0005 the air being firstly cooled and subsequently heated or vice versa
• CPC Class Codes: B60H 1/00057 the air being heated and cooled simultaneously, e.g. using parallel heat exchangers
• 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 1/034 from the cooling liquid of the propulsion plant and from an electric heating device
• CPC Class Codes: B60H 1/2218 controlling the operation of electric heaters
• CPC Class Codes: B60H 1/32 Cooling devices B60H1/00478, B60H1/005 take precedence; vehicles adapted to transport refrigerated goods B60P3/20
• CPC Class Codes: B60H 2001/00171 Valves on heaters for modulated liquid flow
• CPC Class Codes: F24F 5/0042 characterised by the application of thermo-electric units or the Peltier effect
• CPC Class Codes: F25B 21/02 using Peltier effect; using Nernst-Ettinghausen effect
• CPC Class Codes: F25B 21/04 reversible
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

Certain disclosed embodiments pertain to controlling temperature in a passenger compartment of a vehicle. For example, a temperature control system (TCS) can include an air channel configured to deliver airflow to the passenger compartment of the vehicle. The TCS can include a one thermal energy source and a heat transfer device connected to the air channel. A first fluid circuit can circulate coolant to the thermal energy source and a thermoelectric device (TED). A second fluid circuit can circulate coolant to the TED and the heat transfer device. A bypass circuit can connect the thermal energy source to the heat transfer device. An actuator can cause coolant to circulate selectively in either the bypass circuit or the first fluid circuit and the second fluid circuit. A control device can operate the actuator when it is determined that the thermal energy source is ready to provide heat to the airflow.

Claims

1. A system for controlling temperature in a passenger compartment of a vehicle, the system comprising:

at least one passenger air channel configured to deliver a passenger airflow to the passenger compartment of the vehicle,

at least one thermal energy source,

at least one heat transfer device disposed in the passenger air channel, the heat transfer device comprising a fluid conducting tube,

at least one thermoelectric device,

a first fluid circuit configured to circulate coolant to the thermal energy source and the thermoelectric device,

a second fluid circuit separate from the first fluid circuit, the second fluid circuit configured to circulate coolant to the thermoelectric device and the fluid conducting tube of the heat transfer device,

a third fluid circuit configured to circulate coolant to the thermoelectric device and to at least one low temperature core, the third fluid circuit configured to bypass the thermal energy source and the low temperature core configured to dissipate thermal energy to ambient air,

at least one bypass circuit configured to connect the thermal energy source to the fluid conducting tube of the heat transfer device,

at least one actuator configured to cause coolant to circulate in the bypass circuit instead of the first fluid circuit and the second fluid circuit, and

at least one control system configured to operate the at least one actuator in a first mode while the thermal energy source is warming up and a second mode when the thermal energy source is ready to provide heat to the passenger airflow, thereby causing coolant to circulate in the bypass circuit instead of in the first fluid circuit and the second fluid circuit,

wherein, when the control system operates in the first mode, coolant is circulated through the second fluid circuit and the fluid conducting tube of the heat transfer device, and

wherein, when the control system operates in the second mode, coolant is circulated through the bypass circuit and the fluid conducting tube of the heat transfer device.

2. The system of claim 1, wherein the second fluid circuit comprises at least one pump configured to circulate coolant in the second fluid circuit.

3. The system of claim 1, further comprising at least one evaporator operatively connected to the passenger air channel.

4. The system of claim 1, further comprising at least one blend door operatively connected in the passenger air channel and configured to route the passenger airflow across the heat transfer device.

5. The system of claim 4, wherein the at least one passenger air channel comprises a first air channel and a second air channel in at least partial parallel arrangement with respect to the first air channel, wherein the at least one blend door is configured to selectively divert the passenger airflow such that the passenger airflow flows through the first air channel, through the second air channel, or through both the first air channel and the second air channel.

6. The system of claim 1, wherein the at least one thermal energy source comprises a vehicle engine.

7. The system of claim 1, wherein the at least one low temperature core comprises a radiator configured to dissipate heat.

8. The system of claim 1, wherein the third fluid circuit comprises at least one pump to circulate fluid in the third fluid circuit.

9. The system of claim 1, wherein the at least one control system is further configured to:

determine whether the system is operating in a heating mode or a cooling mode; and

operate the at least one actuator to cause coolant to circulate in the third fluid circuit when the system is operating in the cooling mode.

10. The system of claim 9, wherein the system operating in the heating mode comprises the control system operating in the first mode and the second mode, and wherein when the system operates in the cooling mode, coolant is circulated through the second fluid circuit and the fluid conducting tube of the heat transfer device.

11. The system of claim 10, wherein the control system is further configured to:

determine when the system is operating in a demisting mode; and

operate the at least one actuator to cause coolant to circulate in the second fluid circuit or the bypass circuit when the system is operating in the demisting mode; and

wherein when the system operates in the demisting mode, coolant is circulated through the second fluid circuit or the bypass circuit and through the fluid conducting tube of the heat transfer device.

12. The system of claim 9, further comprising:

a first tubing portion connected to the first fluid circuit, the bypass circuit, and the third fluid circuit, the first tubing portion configured to convey coolant therethrough; and

a second tubing portion connected to the first fluid circuit, the bypass circuit, and the third fluid circuit, the second tubing portion configured to convey coolant therethrough and downstream from the first tubing portion with respect to a direction of coolant flow through the first and third fluid circuits and the bypass circuit;

wherein when the control system operates in the first mode, coolant is circulated through the first fluid circuit, the first tubing portion, and the second tubing portion;

wherein when the control system operates in the second mode, coolant is circulated through the bypass circuit, the first tubing portion, and the second tubing portion; and

wherein when the system is operating in the cooling mode, coolant is circulated through the third fluid circuit, the first tubing portion, and the second tubing portion.

13. The system of claim 12, further comprising:

a third tubing portion connected to the second fluid circuit and the bypass circuit, the third tubing portion configured to convey coolant therethrough; and

a fourth tubing portion connected to the second fluid circuit and the bypass circuit, the fourth tubing portion configured to convey coolant therethrough, and the fourth tubing portion downstream from the third tubing portion with respect to the direction of coolant flow through the bypass circuit and downstream from the third tubing portion with respect to a direction of coolant flow through the second fluid circuit;

wherein when the control system operates in the first mode, coolant is circulated through the second fluid circuit, the third tubing portion, and the fourth tubing portion;

wherein when the control system operates in the second mode, coolant is circulated through the bypass circuit, the third tubing portion, and the fourth tubing portion; and

wherein when the system is operating in the cooling mode, coolant is circulated through the second fluid circuit, the third tubing portion, and the fourth tubing portion.

14. The system of claim 1, wherein the at least one thermal energy source is ready to provide heat to the passenger airflow when the thermal energy source reaches a threshold temperature.

15. The system of claim 1, wherein the at least one thermal energy source is ready to provide heat to the passenger airflow when the coolant circulating through the at least one thermal energy source reaches a threshold temperature.

16. The system of claim 1, wherein the at least one actuator comprises a fluid control device, a valve, a regulator, or a combination of structures.

17. The system of claim 1, further comprising:

at least one evaporator operatively connected to the passenger air channel; and

at least one blend door operatively connected in the passenger air channel and configured to route the passenger airflow across the heat transfer device, the at least one blend door downstream of the at least one evaporator with respect to a flow direction of the passenger airflow when the passenger airflow is being delivered to the passenger compartment of the vehicle;

wherein the at least one passenger air channel comprises a first air channel and a second air channel in at least partial parallel arrangement with respect to the first air channel, wherein the at least one blend door is configured to selectively divert the passenger airflow such that the passenger airflow flows through the first air channel, through the second air channel, or through both the first air channel and the second air channel;

wherein the heat transfer device is operatively connected to the second air channel; and

wherein when the at least one blend door diverts the passenger airflow through the second air channel or through both the first air channel and the second air channel, the heat transfer device is directly downstream of the evaporator with respect to the flow direction of the passenger airflow.