LN2 Quick Freezing and Low-Temperature Cooling Equipment
Dongguan Kunning Low Temperature Equipment Co., Ltd. — from equipment solutions to on-site commissioning, we configure the right quick freezing and chilling equipment for food processing enterprises.
Product Center
Four equipment lines, covering both the LN2 quick freezing and forced cold-air cooling process routes.
Immersion Chiller
Rapid cooling equipment that exchanges heat directly through a liquid medium, customized to the material and production line rhythm.
LN2 Blast Freezer
Three specifications — [LFC-300](/en/products/dkn-lfc-300/) / [LFC-600](/en/products/dkn-lfc-600/) / [LFC-1200](/en/products/dkn-lfc-1200/) — working temperature from -150℃ to room temperature, temperature control accuracy ±1~±2℃.
LN2 Tunnel Freezer
Mesh-belt continuous production line, tunnel mesh belt 6000×1200 mm, infeed/outfeed cycle adjustable from 6~30 minutes.
Blast Chiller
Dual-cabinet forced cold-air circulation, minimum -45℃ inside the cabinet, about 200 kg per batch, rapid cooling for cooked food and bakery products.
Equipment Configuration Features
Food-Grade Stainless Steel Cabinet
The inner and outer chambers of the freezer are formed from sheared, bent and welded SUS304 food-grade stainless steel plate, with reinforcing ribs at load-bearing positions.
150 mm Low-Temperature Insulation
Multi-layer foamed low-temperature insulation, 150 mm thick; ultra-low-temperature sealing rings at the joints between inner and outer chambers do not harden at low temperatures and can absorb the cold-shrinkage stress of the inner box.
Imported Electrical Components
The blast freezers are equipped with PLC and touch screen, PT100 platinum resistance sensors, and relays and contactors.
Safety Interlock Design
The LN2 tunnel freezer is equipped with an oxygen concentration detector (set at 19.5%~21.5%); when oxygen concentration is too low, the solenoid valve closes automatically and the exhaust fan keeps running.
Lift-Type Body Structure
The tunnel body adopts an integral lifting design, with a maximum lift height of 550 mm and an inner chamber of 750 mm, facilitating parts replacement and maintenance.
Self-Adaptive Tensioning Device
The tunnel conveyor belt is equipped with a self-adaptive tensioning device that maintains operating tension at low temperatures, balancing mesh-belt life and smooth operation.
Industries
LN2 quick freezing uses liquid nitrogen at -196℃ to exchange heat directly with food. The food passes rapidly through the 0℃～-5℃ maximum ice crystal growth zone, forming fine ice crystals and reducing drip loss.
Seafood Processing
Shrimp, fish fillets, fish heads, abalone, sea cucumber, oysters
Meat & Poultry
Beef and mutton, lamb skewers, poultry cuts
Prepared Food
Prepared dishes, central kitchen finished products, skin-pack semi-finished products
Bakery
Rapid cooling of bread, cakes, mooncakes
Fruit & Vegetable
Freshness-locking quick freezing of bamboo shoots and fruit & vegetable materials
Juice & Beverage
Rapid freezing of juice materials and fruit pulp
About Kunning
Dongguan Kunning Low Temperature Equipment Co., Ltd. was founded in 2024 and is located in Humen Town, Dongguan City, Guangdong Province. We focus on the R&D, manufacturing and sales of LN2 quick freezing equipment and low-temperature cooling equipment, while also providing customers with ultra-low-temperature freezing and quick freezing technical solutions.
Our equipment can be configured in combination according to the customer's product form, capacity and process requirements, covering cabinet, chamber and tunnel types among other models, and we design and manufacture customized products according to user requirements.
In the Southeast Asia market, LTN IMPORT EXPORT TRADING COMPANY LIMITED (Vietnam) acts as our regional agent, handling after-sales service and market promotion as well as equipment sourcing and import/export arrangements.
LN2 freezing engineering notes
Selection methods, parameter definitions and site conditions, taken from our technical documents
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
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
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
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
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
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
Need a quick freezing solution for your product?
Tell us the material type, weight per batch, infeed temperature and target temperature, and we will provide a configuration plan and quote based on the actual situation.
Contact Us