Temperature control device with a flexible temperature control surface

1. A device for performing a polymerase chain reaction (PCR) in a reaction chamber, comprising:

a bladder assembly comprising:

a first temperature-control bladder configured to receive a temperature-control fluid from a first inlet channel and expel said temperature-control fluid from a first outlet channel, wherein said first temperature-control bladder comprises a flexible, heat conductive surface that comes in contact with at least a portion of an exterior surface of a reaction chamber after receiving said temperature-control fluid; and

a second temperature-control bladder configured to receive said temperature-control fluid from a second inlet channel and expel said temperature-control fluid from a second outlet channel, wherein said second temperature-control bladder comprises a flexible, heat conductive surface that comes in contact with another portion of exterior surface of said reaction chamber after receiving said temperature-control fluid;

a first heat exchanger that is connected to both said first and second inlet channels via a first two-way valve and a first three-way connector, said first heat exchanger maintains said temperature-control fluid at a first temperature;

a second heat exchanger that is connected to both said first and second inlet channels via said first two-way valve and said first three-way connector, said second heat exchanger maintains said temperature-control fluid at a second temperature; and

a pump located between said bladder assembly and said heat exchangers, said pump is connected to said first and second outlet channels via a three-way connector and is connected to either said first heat exchanger or said second heat exchanger via a second two-way valve.

2. The device of claim 1 , wherein said reaction chamber is a tubular chamber.

3. The device of claim 1 , wherein said reaction chamber is a slide chamber.

4. The device of claim 1 , wherein said first heat exchanger comprises a heat conductive block comprising a cartridge heater and parallel serpentine channels or fins.

5. The device of claim 1 , wherein said first heat exchanger comprises a thermocouple.

6. The device of claim 1 , wherein said first heat exchanger maintains the temperature of the temperature-control fluid by PID control.

7. The device of claim 1 , wherein said first heat exchanger maintains the temperature of the temperature-control fluid by fuzzy control.

8. The device of claim 1 , further comprising a computer that controls said pump, said first and second heat exchangers, and said valves.

9. A bladder thermal cycler for performing PCR, comprising:

a bladder assembly configured to receive a reaction chamber, said bladder assembly comprises:

at least one temperature-control bladder having a thermal conductive surface, said temperature-control bladder is inflatable with a temperature-control fluid and said thermal conductive surface forms a contact with an exterior surface of a reaction chamber placed within said interior space when said temperature-control bladder is inflated, said bladder is configured to receive said temperature-control fluid from an inlet port and expel said temperature-control fluid from an outlet port;

a first temperature control device capable of bringing said temperature-control fluid to a first temperature when said temperature-control fluid passes through said first temperature control device;

a second temperature control device capable of bringing said temperature-control fluid to a second temperature when said temperature-control fluid passes through said second temperature control device;

a first fluid control device that delivers said temperature-control fluid at said first temperature to said bladder assembly via a first two-way valve;

a second fluid control device that delivers said temperature-control fluid at said second temperature to said bladder assembly via a second two-way valve; and

a system controller that controls said temperature control devices and fluid control devices.

10. The bladder thermal cycler of claim 9 , wherein said first and second temperature control devices each comprises a heating block comprising one or more fluid channels and a heater.

11. The bladder thermal cycler of claim 10 , wherein said fluid channels are serpentine channels.