12 Pallets Vacuum Cooler
12 pallets vacuum pre-cooling machine,using vertical lifting door or folding hydraulic door design, With automatic loading and unloading functions, the pre-cooling efficiency is greatly improved, which is very suitable for large farms to pre-cool fruits and vegetables. It can pre-cool 8500 kg of fruits and vegetables at a time, and the pre-cooling time is about 25 minutes
12 Pallets Vacuum Cooler
- Pre-cooling temperature: from ambient temperature down to 2°C
- Batch capacity: 8,500 kg
- Pre-cooling time: 25 minutes
- Vacuum chamber internal dimensions: L7.5 × W2.5 × H2.2 m
- Loading method: conveyor plate loading (loading and unloading proceed simultaneously with pre-cooling), fully automatic operation, high efficiency
- Vacuum system: dry oil-free vacuum pump set, no oil change required, no concerns about oil emulsification
- Refrigeration system: main unit adopts Bitzer Germany semi-hermetic screw compressor
- Cooling method: evaporative condenser, no concerns about water scaling or winter freezing
- Pre-cooler door: vertical lifting door
- Applicable produce range: leafy vegetables, fruits with loose cuticles, edible mushrooms, etc.
Main components of a pre-cooler:
1.Vacuum chamber
It is made of carbon steel/304 stainless steel through welding, with the structural frame integrally welded from carbon steel/stainless steel. The pre-cooler door is a vertical lifting door, and the conveying system is welded from stainless steel loading plates and conveyor wheel rails. The conveying system is directly driven by a gear reducer, as shown in the figure below:
2.Vacuum system
A dry pump set is used (a dry water ring vacuum pump + dry Roots vacuum pump evacuate to the saturation pressure corresponding to the boiling point of water evaporation, then switch to a dry screw pump to continue evacuating to the saturation pressure corresponding to water vapor at 2°C).
3.Refrigeration system
The German Bitzer semi-hermetic screw compressor is used as the main refrigeration unit, and a self-made evaporative condenser is used as the condenser. The core components of the water catcher (cold trap) are manufactured using the hot-dip galvanizing process. All refrigeration valves are of the Danish Danfoss brand, ensuring durability and excellent water capture performance
4.Loading System
The system utilizes loading plates for operation (two loading plates are used alternately for inbound and outbound processes—while Loading Plate A is inside the chamber for pre-cooling, Loading Plate B is outside the chamber for loading/unloading, and vice versa). This significantly enhances pre-cooling efficiency.
5.Control System
Controlled by PLC + touch screen, featuring a user-friendly interface, one-touch start, and fully automatic operation.
We offer customized service solutions to meet your specific requirements, including:
- Pre-cooling duration
- Single-batch fruit and vegetable processing capacity
- Cooling method (air cooling, water cooling, or evaporative cooling)
- Loading method (plate conveying, chain plate conveying, or forklift loading)
- Door type (vertical lifting door, sliding door, or hydraulic flap door)
- Appearance color and electrical parameters (50Hz/60Hz)
