what are the occupational hazards in the refrigeration industry? How to protect?

One is the harm caused by refrigerant leakage. For example, if ammonia is used as refrigerant, once the evaporator runs out of ammonia, the consequence will be more serious. Ammonia is a toxic gas with strong irritating odor. 1t can not only stimulate the mucous membrane of inhalation tract, but also cause poisoning. Mild poisoning manifested as rhinitis, pharyngitis, tracheitis, patients with throat pain, cough, shortness of breath, hemoptysis, chest pain and other symptoms. Severe poisoning may include laryngeal edema, glottic stenosis and mucous membrane shedding of the suction duct, resulting in tracheal obstruction and causing asphyxia and sudden death. 1f high concentration of ammonia or ammonia comes into contact with human skin, it can cause skin burn, blistering and necrosis; Splash into the eye can make conjunctival edema, corneal ulcer, iritis, lens opacity, and even corneal perforation and blindness

in addition, some people may have allergic reactions to ammonia, such as allergic dermatitis or allergic asthma. For some medium-sized refrigeration equipment using freon-12 as refrigerant, although we have not heard of Freon poisoning at present, if there is leakage, people will feel tired, throat dry and uncomfortable after a large amount of inhalation< The second is the harm of ozone. Ozone has strong oxidizability and can interact with many kinds of metals and organics. Therefore, most refrigerators are disinfected and deodorized by ozone. However, ozone is a harmful substance, which will cause harm to the environment and workers. According to the introduction of medical experts, under the condition of micro ozone concentration (e.g. 0.21-2.10mg / Nm3), as long as exposed for 1-2h, it will cause cough, pharyngitis, dyspnea and other symptoms; At the concentration of 11-21 mg / Nm3, it can cause pulse acceleration, fatigue, headache, stay for more than 1 hour, emphysema and even death< The third is the harm of low temperature. The temperature of cold storage is generally between 0 ℃ and - 23 ℃. 1f the workers work in low temperature environment for a long time, they may have the symptoms of skin temperature decrease, oxygen consumption increase and gastric juice secretion increase; 1f you work in this environment for a long time, and the measures of cold protection and warmth preservation are not good, frostbite, lumbocrural pain and arthritis are easy to occur; 1n summer, the temperature difference between inside and outside the warehouse is large. 1f you don't pay attention to changing clothes in time, you are easy to catch a cold. 1n addition, if workers are not careful when loading and unloading goods in the cold storage, accidents such as collision, object strike, falling from height and other personal injuries often occur. 1n addition, due to poor management, workers and outsiders may be trapped in the warehouse with frostbite and death the following points must be achieved in the protection of occupational hazards in cold storage operation: 1. Establish and improve various rules and regulations, so as to have rules to follow; 1n addition, we should strengthen the education of safety knowledge for workers working in cold storage, improve their awareness of safety production, and put an end to illegal operation and risky operation

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