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    Haikou exploded, the central air conditioner was back

    Haikou exploded, the central air conditioner was back, was it wrong Since 2020, the safety of the use of central air conditioning has been widely concerned. From the clustered infections in closed places during the epidemic to the explosion accident in Haikou on the evening of June 3, they were caused by improper use of central air conditioning, causing users to Concerns about the safety of use. 　　The explosion of the Haibao Senbao Building, after an on-site investigation by experts, the preliminary judgment was that the central air conditioning refrigerant and refrigeration oil leaked. Therefore, whether the leakage of refrigerant is common or whether the use of refrigerant is safe has become the main concern of this incident. 　　Industry Online learned through exchanges with several central air-conditioning manufacturers that the reason may be this: If the explosion is caused by refrigerant leakage, then the most likely reason is that it is caused by an open flame. 　　First of all, for the leakage of refrigerants, central air-conditioning manufacturers have a complete response plan in the key links of product installation and equipment maintenance. 　　The central air conditioner is a "three-point product, seven-point installation" product. The installation steps of the equipment are an important factor to ensure the product's use effect. Therefore, each manufacturer strictly regulates the installation process. The installation process of the refrigerant copper pipe is even more subtle, and the welding position (the connection between the copper pipe and the branch pipe), the welding process (nitrogen-filled welding), and the pipeline acceptance (generally not less than 24 hours pressure test) , Refrigerant filling (pumping to vacuum, testing pressure until suitable) and other key links, have a clear operation process to ensure the operation effect. Even if there is a refrigerant leak during use, the air-conditioning equipment will promptly give a low-pressure alarm prompt, and the after-sales personnel of each manufacturer will repair according to the operation process of "test leakage point-repair leakage-supplementary filling", so as long as timely maintenance Reporting repairs will not cause serious consequences such as this incident. 　　Second, the nature of the central air-conditioning refrigerant is still at a relatively safe level. 　　The safety of the refrigerant is mainly due to its physical and chemical properties. At present, the refrigerants used in the residential central air conditioning system are mainly R22, R410A and R32: As the most widely used medium and low temperature refrigerant, R22 has stable performance, non-combustible, and non-corrosive, but its GWP (Substance Greenhouse Effect Index) is high. It is a non-environmental refrigerant and has a certain destructive effect on the climate. Therefore, it is restricted in the Montreal Protocol and eliminated within a specified period. 　　R410A is the mainstream refrigerant of current multi-line products. Its flammable polarity in the air is 0, and its physical properties are stable. Therefore, it is widely used and has good safety. Due to its flammable and explosive properties, R32 is dangerous in situations where there is a large amount of refrigerant leakage and it stays in a certain space. The current product promotion process is relatively slow, only in some unit products of larger brands. Applied. 　　In summary, there is very little possibility of refrigerant leakage and refrigerant safety. 　　 So, where does the open flame come from? In addition to human factors, the main hidden dangers of open flames should be excessive refrigerant pressurization, the air conditioner compressor only opens a high-pressure or low-pressure valve, the refrigeration copper pipe is welded through, the compressor lubricating oil effect causes internal components to wear and overheat, and internal components are in contact Poor generation of sparks and other aspects. 　　If strictly follow the installation process, the first three hidden dangers can be avoided in the initial installation and commissioning. Considering that the higher temperature in summer is more likely to accumulate heat, therefore, the aging of the line, lack of timely maintenance or the main cause of the accident. 　　At present, the incident has not been concluded, and the investigation of the service life of the accident equipment, the type of refrigerant, the ignition point and the cause is still ongoing. 　　Although the analysis shows that the incident is more likely to be caused by accidental factors, the after-sales service of the central air conditioner still needs to be optimized. As an important part of the equipment life cycle, perfect and standardized product service system is becoming another standard to measure the strength of the brand. 　　In short, under the development trend of "product segmentation, service quality, and user diversification", central air-conditioning products, as just-needed products for social development, are still accelerating their coverage and industry scale. Although the occurrence of accidents will inevitably cause users' concerns, such cases are few and unrepresentative. In addition, the current installation and maintenance procedures are all in order, and users do not need to worry too much about the safety of the use of central air conditioning. 　　As the demand for maintenance services grows under the influence of the epidemic, the “shortcomings" of the central air-conditioning industry will be filled up quickly. The temporary storm may become a spur to the development of the industry, and ultimately will promote the healthy and orderly development of the market.

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