Passive cooler box is a device that does not require an external power source and uses insulation materials and refrigerants to maintain low internal temperatures. Its development history can be traced back to the end of the 19th century. With the advancement of technology and changes in market demand, it has gradually evolved into an important tool that is widely used in food, medicine and other fields today.
Initial development
The concept of passive koelbox first appeared in the late 19th century, when it was mainly used for food transportation. The original refrigeration box used natural ice as a refrigerant, and used thick insulation materials to delay the melting of ice to maintain the low temperature inside the box. Although this method is simple, it has limited effect in long-distance transportation.
Technological progress
In the early 20th century, with the continuous development of the chemical industry, dry ice (solid carbon dioxide) began to be used in refrigeration boxes. The use of dry ice greatly improved the refrigeration effect and service time of refrigeration boxes. At the same time, insulation materials have been continuously improved, from the initial wood and straw to the later foam plastics and vacuum insulation boards, and the insulation performance has also been significantly improved.
Modern application
In the 21st century, with the further development of science and technology, passive refrigeration boxes have made significant progress in materials and design. Modern passive refrigerators usually use efficient phase change materials (PCM) as refrigerants, which can absorb or release a large amount of heat at a specific temperature, thereby maintaining a stable temperature inside the box. In addition, the application of nano-insulation materials has brought the insulation performance of refrigerators to a new level.
Market demand
Passive cooler box are particularly widely used in the food and pharmaceutical fields. In food transportation, they can ensure that fresh food remains fresh during long-term transportation. In the pharmaceutical field, especially in the transportation of vaccines and biologics, passive refrigerators can provide a stable low-temperature environment to ensure the effectiveness and safety of drugs.
At present, the use of refrigerators is becoming more and more widespread. When we travel outdoors, passive refrigerators can keep our food and drinks warm without losing the freshness of food. There are many capacity options and they are suitable for a variety of scenarios.
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Post time: Sep-09-2024