A flowcell for containing sample solutions is surrounded by an electric heater which is then surrounded by an isothermal frame having a large heat capacity, and a Peltier element serving as a cooling source is coupled with the isothermal frame. A heat delaying plate is arranged between the flowcell
A flowcell for containing sample solutions is surrounded by an electric heater which is then surrounded by an isothermal frame having a large heat capacity, and a Peltier element serving as a cooling source is coupled with the isothermal frame. A heat delaying plate is arranged between the flowcell and heater and a temperature sensor is arranged between the flowcell and the heat delaying plate. The Peltier element is controlled in such a manner that the temperature of the isothermal frame is maintained substantially at a constant temperature lower than a predetermined temperature at which the sample solution is to be kept. The heater is controlled in accordance with a difference between the temperature of the sample solution and the predetermined temperature.
대표청구항▼
1. A vessel for containing a liquid to be chemically analyzed and for maintaining the liquid at a predetermined temperature comprising: means for containing a liquid; heating means substantially fully surrounding said containing means for heating the liquid; an isothermal frame surrounding said
1. A vessel for containing a liquid to be chemically analyzed and for maintaining the liquid at a predetermined temperature comprising: means for containing a liquid; heating means substantially fully surrounding said containing means for heating the liquid; an isothermal frame surrounding said heating means and having a large heat capacity, said isothermal frame comprising a bottom, side walls integrally formed with the bottom, the sidewalls increasing in thickness from the bottom to upper portions thereof, and a cover detachably provided on the upper portions of the side walls; a cooling source comprising a Peltier element connected to an outer surface of the bottom of said isothermal frame; and means for detecting a temperature of the liquid. 2. A vessel according to claim 1, wherein an outer surface of a the Peltier element is connected to a radiator member and the isothermal frame is coupled with the radiator member by means of screws made of heat insulating material. 3. A vessel according to claim 1, wherein said temperature detecting means is arranged in the containing means. 4. A vessel according to claim 1, wherein said containing means comprises two container halves which are arranged side by side with a narrow space interposed therebetween, said temperature detecting means being arranged in said space. 5. A vessel according to claim 1, wherein said containing means comprises a container having a narrow space formed therein and extending inwardly thereinto, said temperature detecting means being arranged in said space. 6. A vessel according to claim 1, further comprising an auxiliary temperature detecting means for sensing a temperature of said cooling means. 7. A vessel according to claim 1, wherein said temperature detecting means comprises a temperature sensor of thin plate type. 8. A vessel according to claim 1, further comprising a heat resistance member having a lower thermal conductivity than said isothermal frame and interconnecting said Peltier element and said isothermal frame. 9. A vessel according to claim 8, wherein said heat resistance member comprises recesses formed in said outer surface of said isothermal frame. 10. A vessel according to claim 9, wherein said recesses are filled with material having a lower thermal conductivity than said thermal frame. 11. A vessel for containing a liquid to be chemically analyzed and for maintaining the liquid at a predetermined temperature comprising: means for containing a liquid; heating means substantially fully surrounding said containing means for heating the liquid; heat delaying means arranged between the containing means and the heating means for delaying heat transfer therebetween; and temperature detecting means arranged between the containing means and the heat delaying means for detecting a temperature; said heat delaying means having a thermal time constant such that the temperature detected by said temperature detecting means is substantially equivalent to that at the center of said liquid containing means. 12. A vessel according to claim 11, wherein said heat delaying means has a thermal time constant which is substantially equal to that of the containing means filled with the liquid. 13. A vessel according to claim 11, wherein said heat delaying means has a thermal time constant which is somewhat larger than that of the containing means filled with the liquid. 14. A vessel according to claim 11, wherein said heat delaying means has a thermal time constant which is somewhat smaller than that of the containing means filled with the liquid. 15. A vessel for containing a liquid to be chemically analyzed and for maintaining the liquid at a predetermined temperature comprising: means for containing the liquid; heating means substantially fully surrounding the containing means for heating the liquid; an isothermal frame surrounding said heating means and having a large heat capacity; a cooling source arranged on an outer surface of said isothermal frame; heat delaying means arranged between the containing means and the heating means for delaying heat transfer therebetween; and temperature detecting means arranged between the containing means and the heat delaying means for detecting a temperature; said heat delaying means having a thermal time constant such that the temperature detected by said temperature detecting means is substantially equivalent to that at the center of the liquid containing means. 16. A vessel according to claim 15, wherein said cooling source comprises a Peltier element which is provided on an outer surface of the isothermal frame. 17. A vessel according to claim 16, further comprising a heat resistance member having a lower thermal conductivity than said isothermal frame and interconnecting said Peltier element and said isothermal frame. 18. A vessel according to claim 17, wherein said heat resistance member comprises recesses formed in said outer surface of said isothermal frame. 19. A vessel according to claim 18, wherein said recesses are filled with material having a lower thermal conductivity than said isothermal frame. 20. A vessel according to claim 16, wherein an outer surface of the Peltier element is connected to a radiator member and the isothermal frame is coupled with the radiator member by means of screws made of a heat insulating material. 21. A vessel according to claim 16, wherein said isothermal frame comprises a bottom to which the Peltier element is connected, side walls integrally formed with the bottom and a cover detachably provided on upper portions of the side walls. 22. A vessel according to claim 21, wherein said side walls increase in thickness from the bottom to the top thereof. 23. A vessel according to claim 15, wherein said heat delaying means has a thermal time constant which is substantially equal to that of the containing means filled with the liquid. 24. A vessel according to claim 15, wherein said heat delaying means has a thermal time constant which is somewhat larger than that of the containing means filled with the liquid. 25. A vessel according to claim 15, wherein said heat delaying means has a thermal time constant which is somewhat smaller than that of the containing means filled with the liquid. 26. A vessel according to claim 15, wherein said temperature detecting means comprises a temperature sensor of a thin plate type.
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이 특허에 인용된 특허 (4)
Achermann Heinz (Uster CH), Apparatus for thermoanalytical investigations.
Potter Derek Henry,GBX ; Potter Colin Gerald,GBX ; Old John Michael,GBX ; Bell John Irving,GBX, Method and apparatus for temperature control of multiple samples.
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