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AssigneeSGS-Thomson Microelectronics S.A.
InventorsCirino Scarpa, Giuseppe Musco, Alberto Falzone
Estimating the term…
A device for heating chemical tanks includes at least one heat exchanger coil immersed inside a chemical tank. An inert gas, such as nitrogen, is heated and made to flow through the coil to heat a solution in the chemical tank to the desired temperature, which is sensed by a sensor. If microfractures form in the heat exchanger coil, the inert gas simply bubbles out of the solution and does not adversely impact the purity of the solution. In addition, the bubbling of the gas indicates the presence of a microfracture. A second heating coil is provided, and also provides heated inert fluid for heating the solution in the tank. The fluid flow through the first coil is controlled linearly to maintain the temperature at the desired temperature. The fluid flow through the second coil is controlled impulsively to quickly return the solution to the desired temperature after a temperature transient occurs, such as after a relatively cool object is immersed into the solution.
A device for heating chemical tanks, comprising at least one heat-exchanger coil located in the proximity of walls of a chemical tank and immersed inside of it, the tank containing a solution to be heated, wherein in said at least one coil there is made to circulate a flow of inert gas, and further wherein said at least one coil comprises at least one pair of coils, intercalated one with respect to the other, said coils being connected respectively with means feeding the inert gas through respective heating units each receiving an inlet inert gas under pressure and an outlet connected to the inlet of a respective coil, at least one of said at least one heating units being driven by a control unit in a linear manner for maintaining an operating temperature of the solution and at least one other of said at least one heating unit being driven in an impulsive manner by said control unit for the recovery of said operating temperature, respectively.
A device for heating a solution, comprising:
A method for heating a solution, comprising the steps of:
Dependencies are inferred from the claim text.