DKN-LFC-600 is a medium-capacity model in the Kunning Cryo liquid nitrogen quick freezer range: cabinet-type manual door structure, capacity 600 kg/h, common working temperature -150℃ ～ room temperature, temperature control accuracy ±1℃, temperature uniformity ±3℃, no-load cooling no less than 20℃/min, total power 5 kW, supplied by an external liquid nitrogen storage tank at 5-8 bar. Suitable for aquatic products, meat and poultry, prepared dishes and similar batch quick freezing production lines requiring deep low temperature and short freezing time.
Technical Parameters
| Item | Parameter |
|---|---|
| Structure | Cabinet-type manual door |
| External dimensions | 2900 mm (L) × 1700 mm (W) × 2450 mm (H) |
| Internal cavity dimensions | Confirmed per order |
| Common working temperature | -150℃ ～ room temperature |
| Temperature control accuracy | ±1℃ |
| Temperature uniformity | ±3℃ |
| Cooling rate | No less than 20℃/min (no-load, adjustable according to actual conditions) |
| Capacity | 600 kg/h (varies with different products and packaging methods) |
| Total power | 5 kW |
| Power supply specification | 380V/50Hz |
| Refrigerant | 5-8 bar liquid nitrogen |
Capacity varies with product type, piece weight, initial temperature and packaging method; the specific configuration is calculated according to customer materials and capacity requirements.
Cabinet and Insulation
- Inner and outer cavities are formed from SUS304 food-grade stainless steel plate by shearing, bending and welding, with reinforcing ribs and Teflon reinforcement at load-bearing positions, maintaining shape under long-term load.
- Ultra-low temperature sealing rings are used at the joints of inner and outer cavities, which do not harden at low temperatures; the embedded fixed sealing strip absorbs inner box shrinkage caused by low temperature, reducing stress at cabinet joints.
- The insulation layer is a multi-layer adiabatic foaming structure, 150 mm thick.
- High-strength adiabatic supports are arranged at the bottom of the inner cavity, balancing safety and insulation performance under heavy loads.
- The temperature sensor protection tube uses SUS304 seamless tube, positioned in the middle of the inner cavity wall; the exhaust hole is located at the rear of the equipment to prevent condensate from dripping onto the equipment or material trays.
Liquid Nitrogen Circulation and Cooling
- Liquid nitrogen is fed into the equipment from an external storage tank (user-supplied) through a low-temperature high-pressure delivery pipe, with the pipe externally insulated; flow is controlled by a proportional valve, sprayed through multiple holes of a distributor, and broken up and vaporized with fans to directly impact and cool the food.
- Three sealed low-temperature-resistant motors are externally mounted, transmitting power into the cabinet through extended stainless steel shafts, with fully welded sealing flanges outside to prevent cold air leakage; fan speed is frequency-adjustable.
- Circulation fans are low-temperature-resistant engineering plastic multi-blade axial fans, with hydrophobic surfaces that resist frosting; the air field is designed through full simulation, with a uniform air speed of 10 m/s, maintaining orderly cold air circulation even when food trays are placed in the cabinet.
- Dedicated transfer carts and material carts are provided; push-through cart designs are also available as needed to reduce floor space.
Control System and Safety Design
- Human-machine interface (touch screen) input, PLC intelligent control, with PID automatic adjustment function; cooling and holding can be run in ten steps, with automatic alarm and power-off after the program ends.
- PT100 platinum resistance temperature measurement (Class A), temperature measurement range 200℃ ～ -200℃; 7-inch color screen, supporting manual and automatic operation, capable of storing multiple freezing processes, one-touch operation.
- Integrated embedded electrical control cabinet, with the operation screen embedded in the upper part of the cabinet, saving space.
- Safety: dual temperature sensors and feedback system, over-temperature alarm, equipped with grounding wire, circuit breaker and phase sequence protector.
- The operation interface is designed according to ergonomics, with fool-proof touch screen input.
Application Scenarios
| Scenario | Description |
|---|---|
| Aquatic processing | Batch quick freezing of fish, shrimp, shellfish |
| Meat and poultry processing | Individual quick freezing and block freezing of cut meat and poultry |
| Prepared dishes and ready meals | Multi-category batch switching, started by batch |
Other capacity models are available in the same series, with different capacities and external dimensions; for how to choose between cabinet-type and tunnel-type, see Liquid Nitrogen Quick Freezer Selection. For continuous production and stable hourly output, see Liquid Nitrogen Quick Freezing Tunnel; for a model overview, see Liquid Nitrogen Quick Freezer.
Installation Conditions
- Site: reserve operating and maintenance space according to external dimensions; align the cabinet door opening direction with the cart turnover passage.
- Power: 380V/50Hz, wire and ground according to total power and on-site distribution capacity.
- Medium: an on-site liquid nitrogen storage tank and low-temperature delivery pipeline are required (user-supplied), supplied at 5-8 bar.
- Ventilation: provide ventilation according to on-site requirements; the exhaust hole is located at the rear of the equipment.
Warranty and After-Sales
One-year warranty for the whole machine; a solution is provided within 2 hours after receiving the request, arrival on site within 24 hours, and troubleshooting within 72 hours; one free on-site service per year, with lifetime technical support.
Frequently Asked Questions
What are the internal cavity dimensions of DKN-LFC-600?
Internal cavity dimensions are confirmed per order, depending on cart or tray specifications and single-batch loading capacity. After providing tray specifications and single-batch loading capacity, we calculate according to the material.
What is the basis for the 600 kg/h capacity?
600 kg/h is the reference capacity of this model; actual throughput varies with product type, piece weight, initial temperature and packaging method. When selecting a model, provide piece weight and shift output requirements, and we calculate according to the freezing curve.
How does this equipment perform in cooling and temperature control?
No-load cooling rate is no less than 20℃/min, adjustable according to process; temperature control accuracy ±1℃, temperature uniformity ±3℃. Loaded freezing time depends on material thickness and packaging method, calculated according to the specific product.
Where does the liquid nitrogen come from? Does the equipment include a storage tank?
The equipment does not include a liquid nitrogen storage tank. Liquid nitrogen is supplied from the user’s on-site storage tank through a low-temperature high-pressure delivery pipeline, with a working pressure of 5-8 bar; the pipeline is externally insulated to reduce liquid nitrogen loss.
What electrical safety designs are included?
The equipment includes a grounding wire and circuit breaker, and is equipped with a phase sequence protector to avoid wiring errors and reverse operation; the control system has dual temperature sensors and a feedback system, with over-temperature alarm and automatic alarm and power-off after the program ends.
To verify the model according to material and capacity, visit Contact Us and provide piece weight, target core temperature and shift output requirements; we calculate according to the parameters.