Speaking of the mainstream of refrigerating machines, it is a technique called air blasting which puts ingredients in cold air and freezes. It has been adopted by many manufacturers such as household and commercial refrigerator, and it is widely popular due to its ease of use. Despite its widespread use, it is frozen. The ingredients are evaluated lower when the taste falls compared to before freezing.The reason for this is that when frozen in an air blast refrigerator, the crystal of ice becomes as large as about 200 microns, destroying meat and fish cells (20 to 30 microns), umami and nutrients flow out.
It is a method of freezing liquid improves the weakness of the conventional freezing method. The liquid freezer utilized the fact that liquid has higher thermal conductivity than air. This liquid refrigeration system is capable of cooling ice crystals to as low as 5 microns, It can be suppressed to the size, and cell destruction of fresh food that occurs in the freezing process can be reduced as much as possible. This freezing method is drawing attention, because after thawing, the quality unchanged compared to the food before freezing (taste, texture, look).
"Hayabusa" and "ReCella" developed and commercialized by our Company are large and small refrigerating machines for food processing plants and shops that utilize the principle of liquid freezing. The method of use is to cool the frozen solution selected by our company with a liquid freezing machine to cool down to -35 ° C, pack vacuum so that the ingredients do not touch the liquid, or degassed into a commercially available zipper pack, seal it and soak it in liquid It is method. From fresh foods such as meat and fish, kneaded materials such as kamaboko, Japanese pastry confectionery, udon, soba noodle materials, vegetables and fruits, etc. can be quickly frozen.If you prepare and leave it quickly frozen when there is time, you can respond to large orders, seasonal limited rare ingredients can be preserved for a long time fresh. ur liquid freezer is a device that can respond the needs of various customers and will generate profits for companies and shops.
Liquid freezing machines can be frozen at 20 times faster than ordinary freezers. When slowly freezing, the crystals of ice grow larger and hurt the cells, when fast freezing, the ice crystals become smaller and you can avoid damaging the cells.
Meat frozen in a general freezer and thawed. Juice has come out. | Meat which was frozen quickly in a liquid freezer and thawed. Juice has not appeared |
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Micrograph of raw salmon frozen in a general freezer. This cell tissue has collapsed. | Photomicrograph of raw salmon flash-frozen in ReCella80. This cell tissue is maintained. |
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Cooperation: Nagoya University. |
Our small liquid freezer ReCella uses a Stirling cooler, so it is a liquid freezer that can easily cool down to the temperature range where alcohol becomes slurry even with small electric power.
Vegetables / fruits | Meat | Fresh fish | Seafood | Processed・cooked goods |
---|---|---|---|---|
Wild vegetables | Beef | Tuna | Shrimp | Side dish |
Burdock root | Pork | Red snapper | Octopus | Box lunch |
Yam | Chicken | Blaze | Squid | Roast beef |
Broccoli | Internal organs | Anko | Abalone | Pudding |
Mango | Foie gras | Horse mackerel | Salmon roe | Yogurt |
Papaya | Ham | Blowfish | Caviar | Cake |
Thickness /Foodstuff | Beef・Tuna | Pork・Chicken・Lever | White fish | Boiled food | Salmon | Ham・Salmon roe |
---|---|---|---|---|---|---|
2cm | 8~12 | 10~12 | 8~12 | 7~9 | 10~12 | 12~14 |
5cm | 40~50 | 40~50 | 40~50 | 35~45 | 40~50 | 45~65 |
8cm | 60~80 | 70~90 | 60~80 | 50~60 | 70~90 | 80~90 |
10cm | 70~90 | 80~100 | 70~90 | 60~70 | 100~120 | 100~120 |
Type of refrigerator | Quality | Time taken for freezing |
Usability | Introduction cost |
Maintenance cost |
Evaluation |
---|---|---|---|---|---|---|
General refrigerator |
D | D | A | A | A | Good・It is widely used as home use and business use. Good・Easy to use. Good・Cheap price. Bad ・It takes time to freeze. Bad ・Quality after thawing meat and fish are bad, and dripping too much juice. |
Liquid freezing machine |
A | A | B | B | B | Good・After defrosting meat and fish the quality is good and almost no juice. Good・Easy to use. Bad ・Frozen in alcohol therefore it's need to pack. |
CAS freezing machine |
A | B | A | D | D | Good・After defrosting meat and fish the quality is good and almost no juice. Good・Easy to use. Bad ・Recently low-priced items have been sold, but in general the price of the equipment is high. Bad ・Cooling is performed using a large cooler and a magnetic field generator, so running cost is high. |
Proton freezing machine |
A | B | A | D | D | Good・After defrosting meat and fish the quality is good and almost no juice. Good・Easy to use. Bad ・Recently low-priced items have been sold, but in general the price of the equipment is high. Bad ・Cooling is performed using a large cooler, magnetic field generator, and electromagnetic wave generator, so running cost is high. |
Refrigerator for fishing boats |
B | C | C | C | C | Good・Since it cools at ultralow temperature, the quality after thawing is better than that of a general refrigerator. Good・Refrigerating machines used in tuna fishing boats, large items can also be refrigerated. Bad ・The purpose and place to use are limited. |
Dry ice | B | B | C | D | C | Good・Good quality, as it is frozen at ultralow temperature using dry ice. Bad ・Since it is necessary to prepare dry ice to freeze it is costly. Bad ・Equipment to store dry ice is required separately. |
Liquid nitrogen frozen |
A | A | C | C | D | Good・Even when thawing, juice does not ooze at all, quality is the best. Bad ・Handling of liquid nitrogen is difficult. Bad ・It consumes liquid nitrogen, which is costly. Bad ・Foods with a thickness of 12 mm or more may crack when frozen. |
Breedingrange of bacteria |
More than 36℃. Temperature at which moisture begins to escape from food. | |||
Optimal temperature range for bacteria to propagate. (37℃~25℃) |
30 | |||
20 | ||||
Meat pigment begins to change temperature. | 10 | |||
(18℃~-7℃) | 9 | |||
8 | ||||
7 | ||||
6 | ||||
Foodstuff bleeding out much juce at more than 5℃ temperature. | 5 | |||
At temperatures lower than 5℃., there is very little juice from the food. | 4 | |||
3 | ||||
2 | ||||
1 | ||||
0 | ||||
-1 | ||||
Temperature range where the crystals of ice are the largest. (-1℃~-5℃) |
-2 | The speed of passing through the temperature range of -1 to -5 ° C during freezing determines the quality of the food. | ||
-3 | ||||
-4 | ||||
-5 | ||||
-6 | ||||
-7 | ||||
-8 | ||||
-9 | ||||
-10 | ||||
Can save food for 1 year.(-18℃) | -20 | |||
-30 | ||||
-40 | ||||
-50 | ||||
Can save food for 2 year.(-60℃) | -60 |