I. Chamber Structure:

    Thermal Insulation Chamber: Comprises chamber body, top-opening door, and thermal insulation layer made of AISI 304 stainless steel.

    Inner Surface Roughness: Matte finish.

    Thermal Insulation Material: Multi-layer composite ultra-low temperature insulation material produced by BASF Germany.

    Door Sealing: Dual-seal design with French-imported special low-temperature-resistant silicone rubber. The door seal includes an anti-freeze heating system (unique in China) to ensure smooth operation.

    Door Opening Method: Manual.

    Air Circulation System: Includes motor, fan, and airflow distribution device to maintain temperature uniformity inside the chamber.

II. Technical Specifications:

    Workpiece Capacity: 80 kg.

    Internal Effective Dimensions: 400 mm × 350 mm × 350 mm.

    Operating Temperature Range: Adjustable from +200°C to -196°C (ambient temperature to cryogenic).

    Minimum Chamber Temperature: ≤ -196°C.

    Maximum Cooling Rate: ≥ 50°C/min.

    Temperature Control Accuracy: ±2°C during heating, cooling, and holding.

    Temperature Uniformity: ±2°C.

    Door Opening Direction: Top-opening.

    Thermal Insulation Layer Thickness: 150 mm, ensuring external surface remains at ambient temperature during operation.

    Liquid Nitrogen System: Includes insulated pipes, control valves, nozzles, and distributors. Multi-point injection ensures uniform temperature distribution.

    Air Circulation System: Motor, fan, and airflow distribution device.

    Micro-Pressure Relief Valve: Automatically vents when internal pressure exceeds micro-positive levels.

    Heater: Special high/low-temperature-resistant stainless steel dry-bake heating element.

    Electrical Control System: Programmable logic controller (PLC), touchscreen, alarm instruments, AC contactors, intermediate relays, and rotary switches.

III. Installation Parameters:

    Power Supply: 380V, 50Hz, 10A.

    Equipment Dimensions: 1160 mm × 760 mm × 900 mm.

IV. Liquid Nitrogen System Components:

    Liquid Nitrogen System: Includes liquid nitrogen tank (customer-supplied or optional), pressurization system, insulated pipes, control valves, nozzles, and distributors. Multi-point injection ensures temperature uniformity.

    Liquid Nitrogen Solenoid Valve: JAKSA (Germany-imported) ultra-low-temperature solenoid valve for reliable operation at -196°C.

    Liquid Nitrogen Nozzles: Micro-porous nozzles ensure full vaporization of liquid nitrogen. Vaporized nitrogen circulates inside the chamber without direct impingement on workpieces.

    Ultra-Low-Temperature External Motor: Motor mounted outside the chamber with extended driveshaft to operate in ambient conditions.

    Airflow Design: Centrifugal fan for uniform airflow circulation around workpieces.

V. Control System (U.S. Technology):

    Control Mode: Touchscreen + PLC. The touchscreen/computer serves as the upper machine, and PLC as the lower machine, enabling intuitive curve programming, real-time temperature monitoring, and curve comparison.

    Alarms: Audible/visual alerts for improper door closure.

    Manual/Automatic Modes: Both modes use PID control for high-precision temperature regulation.

    Data Logging: Real-time temperature curve display, storage, and export for traceability.

    Operating System: Localized cryogenic treatment OS with preloaded temperature profiles for fully automated operation (unattended).

    Control Components:

        Touchscreen: Taiwan/Kunlun Motai.

        PLC: Mitsubishi (Japan).

        Key Switch: IDEC (Japan).

        Rotary Switches: IDEC (Japan).

        Intermediate Relays: IDEC (Japan).

        Temperature Sensor: PT100 (Germany).

        AC Contactors: Siemens (Germany).

        Circuit Breakers: Siemens (Germany).

        Liquid Nitrogen Solenoid Valve: JAKSA (Germany).

VI. Competitive Advantages:

    Thermal Insulation: Multi-layer composite ultra-low-temperature insulation material from BASF Germany.

    Door Operation: Gear-motor-assisted opening/closing for effortless operation.

    Control System: Touchscreen + PLC interface simplifies curve programming (minutes vs. hours for traditional controllers).

VII. Standard Accessories:

    Automatic control cabinet (1 unit).

    Stainless steel insulated hose (1 unit).

    Certificate of conformity (1 copy).

    User manual (1 copy).

    Maintenance manual (1 copy).

    Electrical schematics (1 copy).

VIII. After-Sales Service:

    Warranty: 1 year, with lifetime maintenance.

    Training: Free technical training for buyer’s personnel.

    Warranty Period: Commences upon final acceptance; covers all non-human/force majeure failures.

    Response Time: On-site repair within 48 hours for quality-related issues.