Liquid nitrogen refrigerating type subzero treating device and temperature detecting control method

• Main Authors: YAN XIANGUO, LAN GUOSHENG, DAN YANAN, LIU ZHIQI
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2010
• Subjects: BLASTING; CHEMISTRY; COLD ROOMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; HEAT PUMP SYSTEMS; HEATING; ICE-BOXES; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; REFRIGERATION OR COOLING; REFRIGERATORS; WEAPONS

A liquid nitrogen refrigerating type subzero treating device and a temperature detecting control method belong to the technical field of liquid nitrogen refrigerating type subzero treatment. The device is characterized in that the device comprises a liquid nitrogen inlet control valve for controlling the volume of the entered subzero treating liquid nitrogen, a control valve for discharging toe tail gas after heat exchange and a safety valve for controlling and treating the pressure in the cavity. A plurality of temperature sensors are arranged in liquid nitrogen scattering cavity, a tail gas storage cavity and a subzero treating cavity, in order to detect the temperature at multi-points and calculate the environmental temperature by weighting. By adjusting the starting and closing of an inlet liquid nitrogen control solenoid valve and a tail gas discharging control solenoid valve, the control of the temperature in the subzero treating cavity is much more exact and is more suitable for the subzero treating te