The working principle and difference between tunnel quick freezer and cold storage quick freezer
2023-01-09
Before introducing the tunnel quick freezer, let me introduce the quick-freezing cold storage, also known as the quick-freezing warehouse. Quick-freezing cold storage usually requires relatively large-scale refrigeration equipment. The cooling capacity of the equipment is directly proportional to the quick-freezing amount of food, and inversely proportional to the quick-freezing time. The quick-freezing storage is to quickly pass food through its largest ice crystal formation area, and the central temperature reaches -18 °C. Freezes quickly.
During the freezing process, food will undergo various changes, such as physical changes (volume, thermal conductivity, specific heat, dry consumption changes, etc.), chemical changes (protein denaturation, color change, etc.), cell tissue changes, and biological and microbial changes. Wait. The feature of quick-frozen food is to keep the original nutritional value, color and fragrance of the food to the greatest extent, that is to say, the quick-freezing cold storage guarantees the maximum reversibility of the above-mentioned changes in the food during the freezing process.
Quickly frozen food has the following advantages:
1. avoid the formation of large ice crystals between cells;
2. Reduce the water out of the cells, less juice loss when thawing
3. The contact time of concentrated solute, food tissue, colloid and various components inside the cell tissue is significantly shortened, and the harm of concentration is reduced to a minimum;
4. Rapidly reduce the food to the temperature below the microbial growth activity, which is beneficial to resist the growth of microorganisms and their biochemical reactions;
5. The food stays in the cold storage for a short time, which is conducive to improving the utilization rate of refrigeration equipment and continuous production efficiency.
The tunnel quick freezer is also called the tunnel-type quick-freezing machine. It has the same principle as the quick-freezing warehouse. The biggest difference is that the quick-freezing tunnel can realize continuous quick-freezing work and improve production efficiency. The entry and exit of goods in the quick-freezing cold storage can only be realized manually. The food that needs to be quick-frozen is put into the cold storage, the refrigeration equipment starts to operate, and the food starts to be cooled and frozen rapidly; when the food is frozen, the refrigeration equipment is shut down. The goods are moved out and transferred to low-temperature refrigerators or other places. The use of quick-freezing tunnels can save the manual handling process. The goods are transported to the tunnel through the conveyor belt. After passing through the tunnel, the goods are quickly frozen and then transported out for the next step. To freeze food through the quick-freezing tunnel, as long as the goods continue to enter the tunnel and generate heat, the refrigeration unit will keep running until the goods stop being transported, and the unit will automatically stop according to the temperature in the tunnel. It not only improves the utilization rate and production efficiency of the equipment, but also saves the electric energy consumed by the unit due to frequent start-up, which plays a role in energy saving.
In addition, I will add to you the working principle of the spiral quick freezer. First of all, put the frozen product tray with the food to be frozen on the horizontal conveying chain of the quick-freezing machine. When the bridge is in position, the pusher will push the frozen product tray on the lifting track to the descending track, and then the frozen product tray will run to the horizontal conveyor chain along the descending track, and the conveyor chain will send the frozen product tray out of the quick-freezing chamber. When the above-mentioned process is realized in the quick-freezing chamber along with the frozen product tray, the strong cold air generated by the refrigeration system of the spiral quick-freezer forms a stable horizontal annular low-temperature air flow under the action of the fan and the deflector, and the frozen food moves vertically. Heat exchange, the frozen food realizes rapid cooling and freezing, and completes the freezing process. All the above processes are completed under the "command" of the "brain" of the quick-freezing machine --- the programmable logic controller (PLC), and the human-computer interaction is realized by the LCD touch screen. In the main interface of the touch screen, there are operation interfaces such as "automatic", "quick freezing time adjustment", "manual", "alarm", "status" and "defrosting". When the system is turned on, it enters the interface of the automatic operation state, and the work order is issued by the "start" and "stop" buttons on the touch screen.
During the freezing process, food will undergo various changes, such as physical changes (volume, thermal conductivity, specific heat, dry consumption changes, etc.), chemical changes (protein denaturation, color change, etc.), cell tissue changes, and biological and microbial changes. Wait. The feature of quick-frozen food is to keep the original nutritional value, color and fragrance of the food to the greatest extent, that is to say, the quick-freezing cold storage guarantees the maximum reversibility of the above-mentioned changes in the food during the freezing process.
Quickly frozen food has the following advantages:
1. avoid the formation of large ice crystals between cells;
2. Reduce the water out of the cells, less juice loss when thawing
3. The contact time of concentrated solute, food tissue, colloid and various components inside the cell tissue is significantly shortened, and the harm of concentration is reduced to a minimum;
4. Rapidly reduce the food to the temperature below the microbial growth activity, which is beneficial to resist the growth of microorganisms and their biochemical reactions;
5. The food stays in the cold storage for a short time, which is conducive to improving the utilization rate of refrigeration equipment and continuous production efficiency.
The tunnel quick freezer is also called the tunnel-type quick-freezing machine. It has the same principle as the quick-freezing warehouse. The biggest difference is that the quick-freezing tunnel can realize continuous quick-freezing work and improve production efficiency. The entry and exit of goods in the quick-freezing cold storage can only be realized manually. The food that needs to be quick-frozen is put into the cold storage, the refrigeration equipment starts to operate, and the food starts to be cooled and frozen rapidly; when the food is frozen, the refrigeration equipment is shut down. The goods are moved out and transferred to low-temperature refrigerators or other places. The use of quick-freezing tunnels can save the manual handling process. The goods are transported to the tunnel through the conveyor belt. After passing through the tunnel, the goods are quickly frozen and then transported out for the next step. To freeze food through the quick-freezing tunnel, as long as the goods continue to enter the tunnel and generate heat, the refrigeration unit will keep running until the goods stop being transported, and the unit will automatically stop according to the temperature in the tunnel. It not only improves the utilization rate and production efficiency of the equipment, but also saves the electric energy consumed by the unit due to frequent start-up, which plays a role in energy saving.
In addition, I will add to you the working principle of the spiral quick freezer. First of all, put the frozen product tray with the food to be frozen on the horizontal conveying chain of the quick-freezing machine. When the bridge is in position, the pusher will push the frozen product tray on the lifting track to the descending track, and then the frozen product tray will run to the horizontal conveyor chain along the descending track, and the conveyor chain will send the frozen product tray out of the quick-freezing chamber. When the above-mentioned process is realized in the quick-freezing chamber along with the frozen product tray, the strong cold air generated by the refrigeration system of the spiral quick-freezer forms a stable horizontal annular low-temperature air flow under the action of the fan and the deflector, and the frozen food moves vertically. Heat exchange, the frozen food realizes rapid cooling and freezing, and completes the freezing process. All the above processes are completed under the "command" of the "brain" of the quick-freezing machine --- the programmable logic controller (PLC), and the human-computer interaction is realized by the LCD touch screen. In the main interface of the touch screen, there are operation interfaces such as "automatic", "quick freezing time adjustment", "manual", "alarm", "status" and "defrosting". When the system is turned on, it enters the interface of the automatic operation state, and the work order is issued by the "start" and "stop" buttons on the touch screen.
How much is the low-temperature quick-freezing warehouse design?
The characteristics of spiral quick freezer and its installation, use and maintenance
Related Article
Explore the key factors influencing the cost of a frozen dumpling production line, including production capacity, automation, and after-sales service.
Factors Influencing the Cost of Frozen Dumpling Production Lines
