Selection rules, parameter definitions and site requirements for Kunning low-temperature equipment, taken from our technical documents so engineers and buyers can quote them directly.
Equipment lines
- Food Blast Chillers DKN-RHC-60D-45 and DKN-RHC-60D-80: Parameters and Configurations of Two Models — Dimensions, loading capacity, compressor power, power supply and cabinet temperature comparison of Kunning Cryo dual-cabinet food blast chillers
- Blast Chiller — Food blast chiller for cooked food: rapid cooling of hot dishes, bakery items and central kitchen batches to below 10°C for food safety compliance.
- Liquid Nitrogen Quick Freezer DKN-LFC-1200: Parameters and Configuration of the Four-Zone Cabinet Model — Kunning Cryo liquid nitrogen quick freezer DKN-LFC-1200: inner and outer dimensions, rack quantity, loading capacity 0–1200 kg/zone
- Liquid Nitrogen Quick Freezer DKN-LFC-1500: Parameters and Configuration of the Dual-Zone Cabinet Model — Kunning Cryo liquid nitrogen quick freezer DKN-LFC-1500 features a dual-zone cabinet structure, inner cavity 1300×1700×1800 mm, overall dimensions
- Liquid Nitrogen Quick Freezer DKN-LFC-300: Parameters and Configuration of a Small Single-Unit Cabinet Model — Kunning Cryo liquid nitrogen quick freezer DKN-LFC-300: inner and outer dimensions, rack and tray specs, freezing capacity 300 kg/h
- Liquid Nitrogen Quick Freezer DKN-LFC-600: Parameters, Configuration and Production Line Matching — Kunning Cryo liquid nitrogen quick freezer DKN-LFC-600: dimensions 2900×1700×2450 mm, working temperature -150℃～room temperature, temperature control
- Liquid Nitrogen Quick-Freezing Tunnel Line DKN-LFT-0908: Parameters and Configuration of the 900 mm Mesh-Belt Continuous Freezer — Kunning Cryo liquid nitrogen quick-freezing tunnel line DKN-LFT-0908: mesh belt 8000 mm × 900 mm, external dimensions 8000×1750×1670 mm
- Liquid Nitrogen Quick-Freezing Tunnel Line DKN-LFT-1206: Parameters and Configuration of the 1200 mm Mesh Belt Continuous Model — Kunning Cryo liquid nitrogen quick-freezing tunnel line DKN-LFT-1206, mesh belt 6000×1200 mm, external dimensions 6000×2200×1750 mm
- Liquid Nitrogen Quick-Freezing Tunnel Line DKN-LFT-1212: Parameters and Configuration of a 12-Meter Mesh-Belt Continuous Freezer — Kunning Cryo liquid nitrogen tunnel line DKN-LFT-1212: mesh belt 12000×1200 mm, outer dimensions 12000×2250×1670 mm, working temperature -150℃ to room
- Liquid Nitrogen Quick-Freezing Tunnel Line DKN-LFT-1612: Parameters and Configuration of 1600 mm Mesh-Belt Continuous Freezing — Kunning Cryo liquid nitrogen quick-freezing tunnel DKN-LFT-1612: mesh belt 12000 mm × 1600 mm, working temperature -150℃ to room temperature, ±2℃ control
- Mesh Belt Freezer DKN-RFT-1208: Parameters and Configuration of 1200 mm Mesh Belt Compressor Refrigeration Model — Kunning Cryo mesh belt freezer DKN-RFT-1208, mesh belt width 1200 mm, mesh belt length 8 m, compressor refrigeration, continuous mesh belt conveying, discharge center temperature calculated below -18℃
- Mesh Belt Freezer DKN-RFT-1612: Parameters and Configuration of the 1600 mm Mesh Belt Compressor Refrigeration Model — Kunning Cryo mesh belt freezer DKN-RFT-1612, mesh belt width 1600 mm, mesh belt length 12 m, compressor refrigeration, continuous mesh belt conveying
- Mesh Belt Freezer DKN-RFT-1618: Parameters and Configuration of the 1600 mm Mesh Belt Compressor Refrigeration Model — Kunning Cryo mesh belt freezer DKN-RFT-1618: 1600 mm belt width, 18 m belt length, compressor refrigeration, continuous mesh belt conveying, discharge core temperature calculated below -18℃, 380V/50Hz
- DKN-RFT-1624 Belt Freezer: Parameters and Configuration of a 1600 mm Belt, 24 m Compressor-Cooled Model — Kunning Cryo belt freezer DKN-RFT-1624: 1600 mm wide, 24 m long belt, compressor cooling, continuous belt conveying, discharge core temperature calculated below -18℃, 380V/50Hz, no liquid nitrogen tan
- Food Blast Chiller DKN-RHC-60D-45: Parameters and Configuration of a Dual-Cabinet Forced-Air Blast Chiller — Kunning Cryo dual-cabinet food blast chiller DKN-RHC-60D-45: overall dimensions 1900×940×2150 mm, single-cabinet inner dimensions 580×720×1430 mm
- Food Blast Chiller DKN-RHC-60D-80: Parameters and Configuration of the Dual-Cabinet -80℃ Model — Kunning Cryo food blast chiller DKN-RHC-60D-80: dual-cabinet with independent doors, cabinet temperature down to -80℃, 9.05 kW compressor, 380V supply, 30
- Immersion Rapid Cooler DKN-RHV-100: Parameters and Configuration of a Small-Batch Cabinet Model — Kunning Cryo immersion rapid cooler DKN-RHV-100 is a cabinet-type single-batch unit with a 100 kg batch capacity. Products are loaded in baskets and immersed in food-grade freezing liquid for direct h
- Immersion Chiller DKN-RHV-1000L: Parameters and Configuration of the Continuous Line Model — Kunning Cryo immersion chiller DKN-RHV-1000L is a continuous line model in the RHV series: material is conveyed by a food-grade mesh belt and immersed in
- Immersion Chiller DKN-RHV-1500L: Parameters and Configuration of the Continuous Line Model — Kunning Cryo immersion chiller DKN-RHV-1500L is an RHV series continuous line model: food-grade mesh belt conveys material into low-temperature freezing
- Immersion Rapid Chiller DKN-RHV-200: Parameters and Configuration of the Cabinet Model — Kunning Cryo immersion rapid chiller DKN-RHV-200 is a cabinet-type single-batch unit with a 200 kg batch capacity; basketed product is immersed in food-grade refrigerant for direct heat exchange, seri
- Immersion Rapid Cooler DKN-RHV-50: Parameters and Configuration of the 50 kg Single-Batch Cabinet Model — Kunning Cryo immersion rapid cooler DKN-RHV-50 is a cabinet-type single-batch unit with a 50 kg batch capacity. Products are loaded in baskets and immersed in food-grade freezing liquid for direct-con
- Immersion Chiller DKN-RHV-500L: Parameters and Configuration of the Continuous Line Model — Kunning Cryo immersion chiller DKN-RHV-500L is a continuous line model in the RHV series: food-grade mesh belt conveying
- Immersion Chiller DKN-RHV-2000L: Parameters and Configuration of a Tunnel-Type Continuous Chilling Line — Tunnel dimensions, throughput, operating temperature, cycle time and electrical parameters of the Kunning Cryo immersion chiller DKN-RHV-2000L
- Immersion Chiller — Immersion chiller for fast food cooling: liquid immersion heat transfer for even, rapid cooling of cooked and packaged products before storage.
- Liquid Nitrogen Quick Freezing Cabinets DKN-LFC Series: How to Determine Racks, Trolleys and Zoning Structure (Four-Model Parameter Comparison) — Comparison of rack and trolley configurations, zoning structure, internal and external dimensions, loading capacity, temperature control accuracy and cooling
- LN2 Blast Freezer — LN2 blast freezers sized by batch weight and target core temperature. DKN-LFC series with racks, trolleys and zone layout. Four models with parameters.
- On-site Interfaces and Supporting Facilities for Liquid Nitrogen Quick-Freezing Tunnel Lines: How to Define Exhaust, Liquid Nitrogen Piping, and Infeed/Outfeed Connections — Beyond the tunnel line itself, exhaust ducts, liquid nitrogen supply piping, infeed/outfeed connections, and maintenance space also determine the freezing
- Liquid Nitrogen Quick-Freezing Tunnel DKN-LFT Series: Parameters and Configurations of Four Models 0908/1206/1212/1612 — Comparison of mesh belt dimensions, external dimensions, total power, freezing cycles and nominal freezing capacities of Kunning Cryo liquid nitrogen
- LN2 Tunnel Freezer — LN2 tunnel freezers built to order: continuous blast tunnel and mesh belt freezers sized by output, product and target core temperature.
Technical articles
- Effects of Altitude and Atmospheric Pressure on Liquid Nitrogen Quick Freezing: Parameters to Verify for Plateau and High-Altitude Projects — As altitude rises and atmospheric pressure drops, the boiling point of liquid nitrogen decreases, changing cooling time and consumption for the same batch. This article covers four parameters to verif
- Why the Cooling Speed of a Food Blast Chiller Varies from Batch to Batch: Airflow Path, Tray Load Thickness and Evaporator Frosting — The cooling time of the same blast chiller can vary widely between batches. This article breaks down the forced cold-air cooling path: heat conduction from the food
- Maintenance Cycles and Consumable Parts List for Liquid Nitrogen Quick Freezing Equipment — Daily, weekly, monthly and annual maintenance items for liquid nitrogen quick freezing cabinets and tunnels, with a consumable parts list covering door seals, fans, liquid feed valves, probes and insu
- Batch or Continuous: Choosing Between a Liquid Nitrogen Freezing Cabinet and a Tunnel — Liquid nitrogen freezing cabinets and tunnels are not two ways of doing the same thing: the former loads by batch and opens the door for in/out access, while the latter runs continuous product flow on
- After Quick-Freezing Discharge: How to Connect Packaging, Transfer and Cold Storage Without Losing Temperature — At the moment products exit the liquid nitrogen quick-freezing equipment, core temperature has just passed -18℃ while quality keeps changing. During the tens of minutes from discharge and transfer to
- How to Calculate Quick-Freezing Capacity: From Batch Weight to Equipment Unit Configuration — When building or expanding a quick-freezing production line, capacity calculation follows five steps: determine per-shift output, define product and batch size, calculate single-unit cycle time, calcu
- Freezing Curve and Maximum Ice Crystal Formation Zone: Which Time Window Quick Freezing Really Needs to Win — The food freezing curve has a nearly flat plateau between -1℃ and -5℃, the maximum ice crystal formation zone that determines texture and juice retention after thawi
- Temperature Fluctuations and Ice Crystal Recrystallization During Frozen Storage: Quality Keeps Changing After Freezing Is Complete — Freezing completion does not mean quality is fixed. During frozen storage, temperature rises and falls, small ice crystals melt and water refreezes on the surface of existing larger crystals, structur
- How to Measure Liquid Nitrogen Consumption and Freezing Energy Use: Four Numbers to Record On-Site and the Calculation Method — Liquid nitrogen consumption per unit cannot be estimated; it must be measured. This article explains the metering devices to install on-site, the four numbers to record per batch, the calculation from
- Hygienic Design and Material Selection for Food Quick-Freezing Equipment: How to Handle Cleaning, Drainage and Joints — Hygienic design for liquid nitrogen freezing equipment in food workshops covers cleanable surfaces, drainage, joints and welds, and material selection. This article explains checkpoints for layout and
- Two Hours After the Cooked Food Leaves the Pot: From 60℃ to 10℃, How to Configure an Immersion Chiller — Cooked food must have its core temperature reduced below 10℃ within two hours after leaving the pot. Air cooling and immersion cooling use different heat exchange pa
- Liquid Carryover and Condensate in Immersion Chillers: Discharge-End Air Knives, Medium Recovery, and Concentration Maintenance — Material exiting the freezing liquid carries medium out, while condensate on tunnel walls dilutes the bath. This article explains carryover factors
- How to Choose an LN2 Blast Freezer: LFC-300 / 600 / 1200 — Choose an LN2 cabinet freezer by batch weight, throughput, product form and target core temperature: LFC-300 300 kg/h, LFC-600 600 kg/h
- Temperature Control Accuracy and Temperature Uniformity of Liquid Nitrogen Freezers: What ±1℃ and ±3℃ Mean — Temperature control accuracy and temperature uniformity are not the same thing: ±1℃ is the temperature fluctuation at a measurement point
- LN2 Consumption in Liquid Nitrogen Quick Freezing: What Pushes It Up and How to Control It On Site — LN2 consumption per batch in liquid nitrogen quick freezing is not a fixed value on the equipment; it is determined by product heat release, loading pattern, door-opening frequency and operating param
- Liquid Nitrogen Freezing Equipment in Hot and Humid Climates: On-Site Operating Points for Southeast Asia and the Middle East — In workshops above 35℃ and 80% humidity, condensation, exhaust, control cabinet heat dissipation and pipe insulation for liquid nitrogen freezing equipment face new issues. This article lists five on-
- Exhaust and Oxygen Concentration Monitoring for Liquid Nitrogen Freezers: Where Nitrogen Goes and How to Set Alarm Values — Liquid nitrogen freezers rely on nitrogen for cooling, but if it can’t be exhausted, it becomes a safety risk. This article explains nitrogen overflow paths
- Key Points for Liquid Nitrogen Tank and Cryogenic Piping Design: From Tank to Freezer Interface — The piping between a liquid nitrogen tank and a freezer involves vacuum-insulated lines, safety relief, vaporizers and interface locations. This article covers tank sizing, pipe selection, safety devi
- How to Determine the Freezing Cycle of a Liquid Nitrogen Quick-Freezing Tunnel: Coordination of Mesh Belt Speed, Loading Capacity and Feed Temperature — Tunnel output is not a fixed figure. Based on the mesh belt dimensions and adjustable freezing cycle ranges of Kunning Cryo DKN-LFT-1206 / 1212 / 1612
- Liquid Nitrogen Freezing vs Compressor Freezing: How to Choose — How to choose between liquid nitrogen freezing and compressor freezing: cooling rate, ice crystal size, drip loss, equipment footprint and site requirements
- Power Distribution and Control Cabinets for Quick Freezing Equipment: From 2.5 kW to 320 kW, How to Connect on the Site Side — Liquid nitrogen freezing cabinets draw 2.5–12 kW, tunnel lines 9–26 kW, immersion chillers 320 kW, all at 380V/50Hz. This article lists power ratings by model and explains the boundary from the worksh
- Prepared Dish Sauce Packet Quick Freezing: How to Determine Core Temperature and How to Split Batches — The draft national standard for prepared dishes prohibits preservatives and requires a core temperature no higher than -18℃ at the end of freezing.
- Frozen Food Equipment Sea Freight Packaging and On-Site Installation Preparation: A Checklist from Factory to First Startup — When liquid nitrogen freezer cabinets and freezing tunnels are exported, packaging methods, container loading and securing, arrival inspection, and on-site installation conditions must all be aligned
- On-Site Acceptance and Trial Run of Quick Freezing Equipment: No-Load, Full-Load and Cooling Curve Acceptance Items — After liquid nitrogen quick freezing equipment is installed, acceptance is done in three steps: no-load trial run, full-load trial run, and verification by cooling curve and core temperature.
- Selection of Freezing Equipment Under Voltage and Frequency Differences in Export Markets: How to Confirm 50/60Hz and 380～480V — The same LN2 freezing equipment shipped to different countries faces different power conditions: voltages of 380V, 400V, 415V, 440V, 480V and frequencies of 50Hz and 60Hz. This article explains which
- Ventilation and Noise Design for Liquid Nitrogen Quick-Freezing Workshops: Exhaust Air Volume, Airflow Organization, and Noise Control — Ventilation in liquid nitrogen quick-freezing workshops must remove vaporized nitrogen and maintain workshop temperature, humidity, and airflow. This article covers exhaust air volume estimation, inle
Questions and direct answers
What is the difference between LN2 quick freezing and compressor freezing?
The temperature of liquid nitrogen is -196℃. When it contacts food it vaporizes and exchanges heat directly with the food; compressor refrigeration removes heat indirectly through cold air or contact surfaces. LN2 quick freezing lets food pass more quickly through the 0℃～-5℃ maximum ice crystal growth zone, forming finer ice crystals and reducing drip loss and damage to cell structure.
After vaporization, liquid nitrogen becomes inert nitrogen gas, which does not oxidize the food or affect its color. The two methods can also be used in combination, matched to product and capacity requirements.
Are an LN2 blast freezer and a blast chiller the same thing?
No. The two use different cooling methods:
| Item | LN2 Blast Freezer | Blast Chiller |
|---|---|---|
| Cold source | Liquid nitrogen (-196℃) | Compressor refrigeration, evaporation temperature -40℃ |
| Cooling method | Direct heat exchange via LN2 vaporization | Forced cold-air circulation |
| Discharge temperature | Can reach below -18℃ (quick freezing) | Typically 3～10℃ (chilling) |
| Typical use | Products that need to be frozen | Rapid cooling of cooked food and bakery products after coming out of the oven |
What information is needed for selection?
Material type and form, single-piece specifications, throughput (kg/batch or kg/h), infeed temperature, target temperature, freezing process temperature, site conditions, power supply specifications, LN2 supply conditions, and delivery location. The more complete the information, the more accurate the configuration and quote.
What needs to be prepared for equipment installation?
- The wiring between the power supply main line and the electrical control cabinet is to be installed by the buyer
- The exhaust duct, liquid nitrogen and liquid nitrogen tank are to be provided by the buyer
- The equipment is delivered to the site by the supplier, which dispatches personnel for installation and commissioning
- Acceptance is carried out by the buyer’s personnel for appearance, configuration and safety, followed by function and operation acceptance after installation and commissioning
The LN2 tunnel freezer is a continuous production line, so operating and conveying interface space must be reserved at the infeed and outfeed ends.
How do the warranty and after-sales service work?
- 1-year warranty on the complete machine, 2-year warranty on the control system
- Free annual on-site after-sales follow-up visits
- After receiving a fault report, we communicate by phone first and provide a solution within 2 hours; if the issue cannot be resolved by phone, we arrive at the site within 24 hours and clear the problem within 72 hours
- During the warranty period, faults caused by the supplier’s design or manufacturing are repaired free of charge
- Long-term technical support and spare parts supply after the warranty period
Can the equipment be customized to our product?
Yes. The equipment can be configured in combination according to the customer’s product form, capacity and process requirements, covering cabinet, chamber and tunnel models, and customized products can be designed and manufactured according to user requirements.
Have another question? Contact us directly: +86 188 2550 1449
For large-batch vegetable or hot-food pre-cooling, see the Vacuum-Fresh vacuum cooling equipment from our affiliated company.
Need a selection recommendation
Send the product form, unit pack weight, target throughput, infeed temperature and target core temperature; we work out the configuration and quote against your actual process.