Chest freezer MR-DF-IR series

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Short description
Upright industrial freezer, rapid cooling tech, electric door open/close, heavy load capacity, Program Control

Application
It is mainly used in medical and industrial refrigerating treatment to generate a uniform, fine and dispersed precipitation in metal structures; precipitation of carbide improves abrasion resistance, friction performance and increases hardness of metal. Widely used for copper sleeve and bearing contracting in precise mechanical assembly. Suitable for large-scale equipment (automotive, heavy engineering machinery, aircraft components, aerospace equipment parts, military equipment parts) low temperature testing. Can be used for touch screens (screen freezing unglued) and demolition operations.

Features

• Microcomputer control, cascade temperature controller, digital temperature display, 0.1°C regulation; operating temperature adjustable from -20°C up to -125°C.
• Multi-safety protection for reliable operation.
• Compressors from TECUMSEH, DANFOSS and EMERSON; automatic cascade refrigeration technology.
• Self-diagnosis function, freezer overload protection, high-pressure switches, overload relays, thermal protection device and other safety functions.
• Three sealed mold layer of insulation; extra-thick high-density polyurethane foam insulation layer; inline vacuum insulation panels.
• Ergonomic/human design for convenience and flexibility.
• Suitable for mechanical production plant use.
• Large condenser design to ensure cooling performance in plant environments.
• Wide volume ratio and large load capacity design.
• Configurable compressor on/off temperatures.
• Fault alarms (over-temperature alarm, sensor alarm, high alarm, compressor overheat alarm).
• Delay boot protection.
• Grounding components for safety.
• LED display showing actual and set temperatures; adjustable over-temperature alarm and fault prompts.
• Non-standard sizes can be customized; ultra-low temperature freezers can be produced down to -100°C for volumes up to 100 m³ (custom).
• Power supply typically 380V/50Hz (can be changed to other standards).
• Optional accessories: PLC controller, LCD color touch-screen, temperature recorder, etc.

Specifications (grouped by temperature class)

-65°C upright industrial freezer
Models: MR-DF-IR-6528 | MR-DF-IR-6550 | MR-DF-IR-6580 | MR-HF-IR-6528 | MR-HF-IR-6550 | MR-HF-IR-6580 | MR-HF-IR-65A16
Volume: 280L | 500L | 800L | 280L | 500L | 800L | 1600L
Inner dimension (mm): 610×600×760 | 800×735×850 | 1000×800×1000 | 800×600×600 | 1200×650×650 | 1350×800×750 | 2000×900×900
Type: Vertical (first three models) | Chest/Horizontal (last four models)
Designed bearing capacity: standard carrying examples: 150KG | 220KG | 300KG | 150KG | 220KG | 300KG | 650KG (designed bearing capacity is two times standard; refrigeration system sized to standard capacity so heavier artifacts may reduce cooling rate)
Temperature range: -10°C ~ -65°C (option for +60°C ~ -65°C)
Cooling capacity at -60°C: 1 kW | 1.5 kW | 2.5 kW | 1 kW | 1.5 kW | 2.5 kW | 4 kW
Temperature accuracy: ±2°C for all models
Heating power: 2 kW | 3 kW | 5 kW | 2 kW | 3 kW | 5 kW | 8 kW (nickel-chromium alloy heater; controller has double safety protection and independent temperature limiter)
Cooling rate: +60°C to -60°C within 1 hour
Circulating air (m³/h): 1650 | 2100 | 2750 | 2100 | 2750 | 3500 | 6000 (internal circulation fan auto-off when door open; touch screen indicates open state)
Refrigerant: R404A / R23
Overall dimension examples (mm): 1150×1150×1850 | 1350×1300×1850 | 1550×1300×2100 | 2200×1150×1150 | 2700×1200×1200 | 2900×1300×1250 | 3700×1400×1350
Power (380V 50Hz): up to 5.5 kW | 7.5 kW | 13.5 kW | 5.5 kW | 7.5 kW | 13.5 kW | 19 kW (max values stated)
Weight examples: 380 kg | 480 kg | 650 kg | 385 kg | 485 kg | 650 kg | 780 kg

-80°C upright industrial freezer
Models: MR-DF-IR-8028 | MR-DF-IR-8050 | MR-DF-IR-80A10 | MR-HF-IR-8028 | MR-HF-IR-8050 | MR-HF-IR-8080 | MR-HF-IR-80A16
Volume: 280L | 500L | 1000L | 280L | 500L | 800L | 1600L
Inner dimension (mm): 610×600×760 | 800×735×850 | 1000×1000×1000 | 800×600×600 | 1200×650×650 | 1350×800×750 | 2000×900×900
Type: Vertical (first three) | Chest/Horizontal (last four)
Designed bearing capacity: sample carrying: 150KG | 220KG | 300KG | 150KG | 220KG | 300KG | 650KG (designed bearing capacity is two times standard)
Temperature range: -10°C ~ -80°C (option +60°C ~ -80°C)
Cooling capacity at -75°C: 1 kW | 1.5 kW | 2.5 kW | 1 kW | 1.5 kW | 2.5 kW | 4 kW
Temperature accuracy: ±2°C
Heating power: 2 kW | 3 kW | 5 kW | 2 kW | 3 kW | 5 kW | 8 kW
Cooling rate: +60°C to -60°C within 1 hour (stated)
Circulating air (m³/h): 1650 | 2100 | 2750 | 2100 | 2750 | 3500 | 6000
Refrigerant: R404A / R23
Overall dimension examples (mm): 1150×1150×1850 | 1350×1300×1850 | 1550×1500×2100 | 2200×1150×1150 | 2700×1200×1200 | 2900×1300×1250 | 3700×1400×1350
Power (380V 50Hz): 7 kW max | 11.5 kW max | 15 kW max | 7 kW max | 11.5 kW max | 15 kW max | 21 kW max
Weight examples: 400 kg | 500 kg | 690 kg | 415 kg | 525 kg | 710 kg | 840 kg

-100°C upright industrial freezer
Models: MR-DF-IR-A028 | MR-DF-IR-A050 | MR-DF-IR-A0A10 | MR-HF-IR-A028 | MR-HF-IR-A050 | MR-HF-IR-A080 | MR-HF-IR-A0A16
Volume: 280L | 500L | 1000L | 280L | 500L | 800L | 1600L
Inner dimension (mm): 800×600×600 | 1200×650×650 | 1550×800×750 | 1200×650×650 | 1550×800×750 | 1200×650×650 | 1550×800×750
Type: Vertical (all listed)
Designed bearing capacity examples: 150KG | 220KG | 300KG | 150KG | 220KG | 300KG | 650KG (designed bearing capacity is two times standard)
Temperature range: -10°C ~ -100°C (option +60°C ~ -100°C)
Cooling capacity at -90°C: 0.7 kW | 1 kW | 2 kW | 0.7 kW | 1 kW | 2 kW | 3 kW
Temperature accuracy: ±2°C
Heating power: 2 kW | 3 kW | 5 kW | 2 kW | 3 kW | 5 kW | 8 kW
Cooling rate: +0°C to -110°C within 1.5 h; 0°C to -140°C within 2 h (for some models)
Inside circulating air (m³/h): 2100 | 2750 | 4500 | 2750 | 4500 | 2750 | 4500 (fan auto-off on door open)
Refrigerant: Mixed CFC-free refrigerant
Overall dimension examples (mm): 2200×1150×1150 | 2700×1200×1200 | 3100×1300×1250 | 2900×1200×1200 | 3200×1300×1250 | 3000×1200×1200 | 3300×1300×1250
Power (380V 50Hz) examples: 12 kW | 16.5 kW | 20 kW | 12 kW | 16.5 kW | 20 kW | 30 kW
Weight examples: 570 kg | 680 kg | 850 kg | 750 kg | 900 kg | 800 kg | 980 kg

-120°C ~ -150°C upright industrial freezer
Models (representative HF series): MR-HF-IR-A228 | MR-HF-IR-A250 | MR-HF-IR-A2A10 | MR-HF-IR-A350 | MR-HF-IR-A3A10 | MR-HF-IR-A550 | MR-HF-IR-A5A10
Volumes and inner dimensions: combinations of 280L, 500L, 1000L (and 500/1000 pairings) with inner dimensions and vertical type as listed above.
Temp. range examples: -120°C ~ 20°C; some models configured -135°C ~ 0°C or -150°C ~ 0°C depending on model.
Cooling capacities: model-dependent; examples include 0.7 kW @ -110°C up to 2 kW @ -110°C and 1–2 kW ranges at lower setpoints; controller/heating arrangements similar to other classes.
Cooling rate examples: 0°C to -110°C within 1.5 h; 0°C to -140°C within 2 h for deep cryogenic models.
Inside circulation and refrigerant: higher-capacity circulating fans (2100–4500 m³/h or 4500 m³/h for larger units). Refrigerant: mixed CFC-free refrigerant or specific blends for very low temperatures.
Overall dimensions, power and weight scale with model (see examples above).

Common Configuration
Controller: ASET multifunctional controller
Operation panel: 7-inch color touch screen, displays set and measured temperatures
Temperature recording: Temperature curve and fault record; U-disk data export in Excel format
Compressor: Emerson Copeland (cascade refrigeration technology) or equivalents (Emerson/Copeland referenced); other compressors referenced (TECUMSEH, DANFOSS) across models
Intermediate heat exchanger: KAORI plate heat exchanger
Dry filter: Emerson
Expansion valve: Electronic expansion valve
Evaporator: Copper-tube with aluminum-fin
Cooling type: Air-cooled with optional water-cooled auxiliary for high ambient (>30°C) environments
Insulation: Polyurethane foam, ~150 mm thermal insulation with embedded VIP boards
Safety: Self-diagnosis; phase sequence/failure protection; leakage protector; cooling unit overload protection; high/low pressure switches; overload relay; thermal protection device; high temperature and temperature fault protection
Case material: Exterior cold-rolled steel with paint; interior SUS304 brushed stainless steel

Optional
MRIR0001: High-temperature option to +80°C / +150°C with ±0.5°C accuracy (note: input power may change)
MRIR0002: Temperature accuracy ±0.5°C option
MRIR0003: Program-controlled cooling and heating (5 programs, each program up to 45 steps) for process requirements
MRIR0004: Interior door to reduce cooling loss when accessing small workpieces (option for low-temp models below -60°C)
MRIR0005: Exterior case in SUS304 brushed stainless
MRIR0006: 50 mm cable hole
MRIR0007: Electric heating vacuum observation window with lighting (200×300 mm)
MRIR0008: Low-temperature automatic defrost (periodic or manual) to maintain long-term low-temperature performance under frequent door opening

Notes
Models and performance parameters (volume, cooling capacity, circulating air, power consumption, dimensions, weights) vary significantly by model variant; specific selection should match target artifact weight and required lowest temperature. Cooling system sizing assumes standard load; heavier loads reduce cooling rate.

Caractéristiques / spécifications techniques

• Commercial designation: MR-DF-IR Series
• Manufacturer / brand: Labfreez Instruments
• Temperature ranges available: approx. -20°C up to -125°C (standard families), -65°C / -80°C / -100°C / -120°C ~ -150°C variants available
• Volume range (examples): 280 L up to 1600 L (some chest/horizontal designs up to 2000 L shown)
• Model families: MR-DF-IR-65xx, MR-HF-IR-65xx, MR-DF-IR-80xx, MR-HF-IR-80xx, MR-DF-IR-A0xx, MR-HF-IR-A0xx, etc.
• Cooling capacity examples: 0.7 kW up to 4 kW (dependent on model and setpoint)
• Cooling rate: examples +60°C to -60°C within ~1 hour; deeper models 0°C to -110°C in ~1.5 h, 0°C to -140°C in ~2 h
• Refrigerants: R404A, R23, R14 or mixed CFC-free blends depending on lowest temperature required
• Compressor brands referenced: Emerson (Copeland), TECUMSEH, DANFOSS
• Controller / UI: ASET multifunctional controller; 7" color touch screen optional; PLC/LCD/T-sensor recording optional
• Insulation: Polyurethane foam ~150 mm with VIP panels
• Case: exterior cold-rolled painted steel; interior SUS304 stainless finish (optional)
• Power supply (typical): 380V 50Hz (configurable); system power demand varies by model (examples: 5.5 kW up to 30 kW max)
• Safety features: multi-level protection (overload, high/low pressure switches, thermal protection, phase protection, self-diagnosis)
• Circulating air: fans ranging ~1650 to 6000 m³/h depending on model
• Optional features: program control (multi-step), USB/U-disk data export, interior door, viewing window, automatic defrost, SUS304 exterior, custom temperature accuracy options