DKN-LFC-1200 is a model with relatively large single-zone loading capacity among Kunning Cryo liquid nitrogen quick freezers: cabinet-type side-opening door, four-zone structure, single-zone loading 0–1200 kg, working temperature -150℃–room temperature, temperature control accuracy ±2℃, total power 12 kW, equipped with oxygen concentration detection and interlocked with the equipment. Suitable for aquatic products, meat and poultry, prepared dishes and similar medium-to-large-scale batch quick freezing requiring deep low temperature and short freezing time.
Technical Parameters
| Item | Parameter |
|---|---|
| Structure type | Cabinet-type side-opening door, four zones |
| Inner cavity dimensions | 2000 mm (W) × 1500 mm (D) × 1750 mm (H), single zone |
| Outer dimensions | 8730 mm (W) × 2350 mm (D) × 2170 mm (H) |
| Racks | 10 (1300 × 1500 × 1470 mm, upper and lower two-layer structure) |
| Working temperature | -150℃ ～ room temperature |
| Temperature control accuracy | ±2℃ |
| Cooling rate | ≤ 50℃/min (no load, adjustable according to actual process) |
| Loading capacity | 0 ～ 1200 kg/single zone |
| Total power | 12 kW |
| Power supply specification | 380V/50Hz wide voltage |
| Refrigerant | 6-8 bar liquid nitrogen |
| Oxygen concentration detection | Set value 19.5% ～ 21.5% |
Processing capacity varies with product type, piece weight, and packaging method; specific configuration is determined 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 at load-bearing positions for reinforcement, maintaining shape under long-term load.
- The connection between inner and outer cavities uses ultra-low-temperature sealing rings that do not harden at low temperatures, with fitted and fixed sealing strips, absorbing inner box contraction caused by low temperature and reducing stress at cabinet connections.
- The insulation layer is a multi-layer adiabatic foaming structure, thickness 150 mm.
- The bottom of the inner cavity is provided with high-strength adiabatic supports, balancing safety and insulation performance under heavy loads.
- Elastic silicone strips are added between the door cover and the cabinet for heat insulation; the temperature sensor protection tube uses SUS304 seamless tube, positioned at the middle of the inner cavity wall, reflecting the true temperature inside the cabinet.
Liquid Nitrogen Circulation and Cooling
- Liquid nitrogen is delivered from an external storage tank (user-supplied) to the equipment through low-temperature high-pressure delivery pipes, with the pipeline outer layer insulated to reduce liquid nitrogen loss.
- Liquid nitrogen flow is controlled by a proportional valve, sprayed through a multi-hole disperser, combined with strong fan crushing and vaporization, directly impacting and cooling the food.
- The circulation motor is a sealed low-temperature-resistant motor mounted externally, transmitting power into the cabinet through an extended stainless steel shaft, with a fully welded sealing flange on the outside to prevent cold air leakage.
- The circulation fan is a low-temperature-resistant, corrosion-resistant multi-blade axial flow fan, not prone to frosting; it maintains orderly and uniform cold air circulation even when food trays are placed inside the cabinet.
Control System and Safety Design
- Human-machine interface (touch screen) input, PLC intelligent control, with PID automatic adjustment function; can run cooling and holding in ten steps, with automatic alarm and power-off after the program ends.
- PT100 platinum resistance temperature measurement, temperature measurement range 200℃ ～ -200℃; 10-inch color screen, supporting manual and automatic operation, can store multiple freezing processes, one-touch operation.
- Integrated embedded electrical control cabinet, with the operation screen embedded in the upper part of the cabinet, saving floor space.
- Safety: equipped with dual-channel temperature sensors for main control and monitoring plus feedback system, over-temperature alarm; oxygen concentration detector interlocked with the equipment; equipped with emergency stop switch, grounding wire and circuit breaker, phase sequence protector.
Application Scenarios and Selection Reference
| Scenario | Description |
|---|---|
| Aquatic processing | Medium-to-large-scale batch quick freezing of fish, shrimp, shellfish, requiring rapid passage through the maximum ice crystal formation zone |
| Meat and poultry processing | IQF and block freezing of cut meat and poultry, requiring deep low temperature and short freezing time |
| Prepared dishes and ready meals | Multi-category small-batch to medium-batch switching, starting programs by batch |
| Central kitchen | Intermittent quick freezing coordinated with portioning rhythm |
The same series also includes DKN-LFC-300 / DKN-LFC-600 / DKN-LFC-1500 and other models, with different single-zone loading capacities and outer dimensions; for how to choose between cabinet-type and tunnel-type, see Liquid Nitrogen Quick Freezer Selection; for the inner cavity dimensions and rack configurations corresponding to the capacities of the four models, see Liquid Nitrogen Quick Freezer DKN-LFC Series Model Comparison. For continuous production with stable hourly output, see Liquid Nitrogen Quick Freezing Tunnel.
Installation Conditions
- Site: reserve operating and maintenance space according to outer dimensions, align the cabinet door opening direction with the material cart turnover passage.
- Power: 380V/50Hz, wire and ground according to total power and on-site power distribution capacity.
- Liquid nitrogen: on-site liquid nitrogen storage tank and delivery pipeline required (user-supplied), supplied at 6-8 bar pressure and flow.
- Ventilation: set up ventilation according to on-site requirements, matching the use conditions of oxygen concentration detection.
Warranty and After-Sales
One-year warranty for the whole machine; proposal within 2 hours after receiving the request, on-site arrival within 24 hours, troubleshooting within 72 hours; one free on-site service per year, lifetime technical support.
Frequently Asked Questions
What is the relationship between the single-zone loading capacity and the whole-cabinet loading capacity of DKN-LFC-1200?
The 0–1200 kg/single zone in the technical parameters refers to the loading capacity of a single zone; the whole machine has a four-zone structure, and the actual total loading capacity is calculated according to the number of zones and material placement method, and needs to be confirmed in combination with piece weight and tray specifications.
What is the cooling rate of this equipment?
The no-load cooling rate is ≤ 50℃/min, adjustable according to the actual production process. The loaded freezing time depends on material thickness, initial temperature, packaging method, and target core temperature, and is calculated according to the specific product.
How much capacity is needed for power distribution?
Total power 12 kW, power supply specification 380V/50Hz wide voltage. On-site power distribution capacity, wire diameter, and grounding are determined according to equipment installation requirements.
Where does the liquid nitrogen come from, and does the equipment come with a storage tank?
The equipment is not equipped with a liquid nitrogen storage tank; liquid nitrogen is supplied from the user’s on-site storage tank through low-temperature delivery pipelines, with working pressure 6-8 bar.
What is oxygen concentration detection used for?
Liquid nitrogen vaporization can cause localized oxygen deficiency; the equipment is equipped with an oxygen concentration detector, set value 19.5%～21.5%, interlocked with the equipment to protect operator safety.
To verify the model according to materials and capacity, you can go to Contact Us and provide piece weight, target core temperature, and shift output requirements, and we will calculate according to the parameters.