Zhongtai Shares announces a patent for \"a heating system to prevent low-temperature cold brittleness in cold boxes\"

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Zhongtai Co., Ltd. announces a patent for an “heating system to prevent cold brittleness in cryogenic chambers” 2025-09-27 Recently, the patent for an “heating system to prevent cold brittleness in cryogenic chambers” applied for by Hangzhou Zhongtai Cryogenic Technology Co., Ltd. was published. The abstract indicates that this invention discloses a heating system to prevent low-temperature cold brittleness in cold boxes, and it falls within the field of cold box protection technology. The system disclosed in this invention includes a heated gas buffer tank, a heated gas circulation fan, a heated gas electric heating furnace, a cold box base heat exchanger, and so on. The nitrogen is sent to the electric heating furnace via a circulation fan for heating; thereafter, it enters the cold box foundation heat exchanger to raise the temperature of the cold box foundation. The cooled nitrogen is then recovered and sent back to the buffer tank. The bottom of the cold box is equipped with a temperature monitoring unit; when an abnormal temperature is detected, the heating system is activated via the central control system to ensure that the base of the cold box receives sufficient heat, thereby effectively preventing freezing and crumbling of the base due to low temperatures. The system is also equipped with a pressure maintenance subsystem, which includes a pressure control valve, a flow detection unit, a seal gas isolation valve, a pressure detection unit, and a seal gas distributor unit. This subsystem is used to maintain stable pressure inside the cryogenic chamber, and it distributes the seal gas evenly throughout the chamber via the seal gas distributor unit, thereby enhancing the effectiveness of pressure maintenance and even distribution by the seal gas.