Chest freezer MR-HF-IR series

verticalprocessventilated

Short description

• Industrial cryogenic freezer for low-temperature treatment of bearings and metal parts
• Selectable temperature ranges: −65°C, −80°C, −100°C, −120°C, −125°C, −135°C, −140°C, −150°C
• Volume range: typical models 280 L to 1600 L; larger A-series available
• Top-loading (vertical) and front-loading (chest/horizontal) configurations; electric door open/close option
• Optional heating, programmable control and custom dimensions/capacity

Application Used for industrial cryogenic treatment to produce uniform carbide precipitation and improve wear resistance, hardness and friction properties. Typical applications: shrink fitting of sleeves and bearings for precision assembly, low-temperature testing of automotive, aerospace and defence components, display/touch-screen processing (freeze separation), demagnetization, and other precision cooling operations in manufacturing processes.

Features

• Microcomputer cascade controller with digital temperature display; adjustable control to 0.1°C (option)
• Wide operating range to ultra-low temperatures (models configurable to −125°C and below)
• Multiple safety protections and self-diagnosis: overload, high/low pressure switches, thermal protection, fault alarms
• Reliable compressors with automatic cascade refrigeration technology
• Triple-sealed molded insulation with ~150 mm high-density polyurethane foam plus vacuum insulated panels (VIP)
• Large condenser and high circulation air design for stable performance in plant environments
• Configurable compressor on/off setpoints, delay start protection and alarm outputs
• LED/7-inch touch display for internal/set temperature and fault prompts; U-disk temperature log export
• Non-standard sizes and ultra-low configurations can be customized to required volume and load

Specifications (selected)

• Model series: MR-DF-IR / MR-HF-IR (examples: MR-DF-IR-6528, MR-HF-IR-65A16, A-series for ultra-low)
• Inner volumes/examples: 280 L, 500 L, 800 L, 1000 L, 1600 L (A-series larger options)
• Designed load examples: 150 kg, 220 kg, 300 kg, up to 650 kg (chest units)
• Cooling performance examples: +60°C to −60°C within ~1 hour; 0°C to −110°C in ~1.5 h; 0°C to −140°C in ~2 h (model dependent)
• Cooling capacity examples: 1 kW to 4 kW depending on model; extreme-low model values shown per model
• Temperature accuracy: typically ±2°C standard; ±0.5°C option available
• Refrigerants: R404A / R23 or mixed CFC-free options for ultra-low models
• Power supply example: standard 380V/50Hz; power up to ~30 kW for largest models

Common configuration (summary)

• Controller: ASET multifunction controller; optional PLC or LCD color touch-screen
• Operation panel: 7-inch color touch screen, set/measured temp display, fault records
• Data logging: temperature curve and fault log, U-disk export in Excel format
• Key components: Emerson Copeland compressors (or equivalent), KAORI plate heat exchanger, electronic expansion valves, Emerson dry filter
• Evaporator: copper tube with aluminum fins; cooling type air-cooled (optional water-cooled auxiliary)
• Exterior/interior: cold-rolled painted steel exterior; SUS304 stainless interior
• Safety: phase sequence detection, leakage protector, overload protection, high/low pressure switches, thermal protection

Optional items

• High-temperature capability up to +80°C / +150°C with ±0.5°C accuracy option
• Program-controlled multi-step cooling/heating (examples: up to 5 programs, 45 steps each)
• Interior access door to reduce cold-air loss, electric-heated observation window with lighting
• Automatic low-temperature defrost for frequent door use, cable pass-through, special exterior finish (SUS304)
• PLC controller, LCD color touch-screen, temperature recorder and additional instrumentation

Technical characteristics

• Insulation: triple-sealed molded, ~150 mm polyurethane foam plus VIP
• Cooling technology: cascade refrigeration with quality compressors; mixed refrigerant options for ultra-low
• Temperature control: microcomputer cascade controller standard; optional program control and high-precision control ±0.5°C
• Customization: non-standard sizes, customized bearing capacities, and model configuration per customer requirements