In recent years, cold storage safety accidents have occurred frequently, which has brought many hidden dangers to everyone's safety to a certain extent, and the safety of cold storage has been paid more and more attention. Air-conditioned storage is different from ordinary cold storage. The low-oxygen environment in the storage makes safety the top priority of the operation of the air-conditioned storage, and even has stricter safety requirements than some ordinary cold storage.

Hypoxia threatens personal safety

The personal safety here refers to the safe operation of entering the air conditioning warehouse. Operators and maintenance personnel must understand that the gas in the air conditioning warehouse cannot sustain human life. When people work in a controlled atmosphere warehouse, they can suffocate and die. Therefore, it is necessary to understand the symptoms of suffocation and understand the degree of danger of different symptoms. Normally, to maintain normal human respiratory function, the oxygen concentration should reach about 21%; an oxygen concentration of more than 10% will make people feel uncomfortable and even faint; when the oxygen concentration is only a single-digit percentage, it will be life-threatening.
Lv Weicheng, an expert in air-conditioning preservation technology, told Refrigeration Express that during the period when air-conditioning storage developed the most rapidly ten years ago, almost every year people were killed due to improper operation and safety accidents. Once at the site of an air conditioning warehouse, maintenance personnel needed to enter the warehouse for maintenance due to a malfunction of the humidifier. Under normal circumstances, the maintenance personnel who entered the warehouse must wear gas masks or oxygen cylinders to enter, but the gas detection equipment at the time showed the oxygen concentration in the warehouse It is 15%. At this concentration, as long as you don't perform strenuous exercise, you can gently enter for maintenance without holding your breath. Since the maintenance personnel have rich experience in the operation of the controlled atmosphere storage, they think that they can enter the controlled atmosphere storage without wearing safety equipment. Unexpectedly, although the detection data is 15%, but the actual oxygen concentration value is only 5%, the detection data has a large deviation. The maintenance staff fainted in the warehouse after walking only 5 or 6 steps. Seeing this situation, the outsiders lacked experience. They rushed in to save people in a hurry, but they were all fainted inside. Later, they were severely treated with hyperbaric oxygen therapy for several days before slowly recovering. “Many people don’t understand the low-oxygen environment of the controlled atmosphere storage well, and don’t know how powerful it is. If the rescue is timely, life-threatening can be avoided. If it slows down, it is very likely that they will become vegetative or even lose their lives. Therefore, safe atmosphere It is too important for the library. Every time a controlled atmosphere storage project is completed, we will conduct safety training for customers and exhort them to operate correctly and safely.” Lu Weicheng emphasized.

How to do the safe operation of air conditioning warehouse?

Because controlled atmosphere warehouses usually store fruits and vegetables with relatively high added value and commodity value. Therefore, it is necessary to enter the warehouse for commodity inspection during storage, and some daily failures of equipment also need to enter the warehouse for maintenance. Therefore, once there is a need to enter the controlled atmosphere warehouse, there will be safety hazards. But this kind of security threat can be completely avoided. Those who enter must know what to do, and those outside the library must also know how to rescue if there is a danger.

First of all, as long as the air-conditioned storage has entered the air-conditioned state, both the air-conditioned door and the observation window must be locked and sealed. On the one hand, it serves as a warning and on the other hand, it also prevents people from entering the library; secondly, the air-conditioned storage There is an observation window on the door, the size is usually 50*80mm, which is convenient for staff wearing safety facilities to check the quality of fruits and vegetables or equipment maintenance; third, at least two sets of tested breathing devices should be prepared in case of emergency ; Fourth, when it is necessary to enter the library, one person entering the library must wear a reliable breathing device to enter through the observation window. Personnel entering must be careful and steady. There must also be 1 or 2 people outside the warehouse and always pay attention to the dynamics of the personnel entering the warehouse. Once an accident occurs to the inside personnel, the outside personnel must calmly take first aid measures, quickly open the door of the air conditioning storage, and force the fan to circulate until the oxygen in the storage returns to a concentration of about 17%. At this time, outside personnel can immediately enter the warehouse for rescue.