The hottest topic in the current logistics industry is the cold chain industry. The cold chain industry is an industry that has just emerged in China and is full of business opportunities. It is also an industry closely related to food safety and even life safety. It is understood that although the operators have been trying to improve the trading environment all the time, they have transformed the original wholesale market to the things ... constant temperature air conditioning, air coolers instead of exhaust pipes, and extensive use of Freon refrigerants are easy to operate, flexible, diverse and efficient. The direction of safety, environmental protection and energy saving. The hottest topic in the current logistics industry is the cold chain industry. The cold chain industry is an industry that has just emerged in China and is full of business opportunities. It is also an industry closely related to food safety and even life safety. It is understood that although operators have been trying to improve the trading environment and transform the original wholesale market into a logistics center, their decision-making is limited due to the lack of professional cold storage construction knowledge, and they often make wrong decisions. It does not meet the basic requirements of logistics centers and cannot successfully achieve transformation. Such cases exist in all major cities. To change the current status quo, logistics professionals are required to participate in decision-making and to improve the cold chain logistics environment. This is a long-term project that requires the joint promotion of all levels. China's cold chain logistics network started late and its development lags behind. There are still many problems in China's cold chain logistics model. Taking primary agricultural products as an example, the weakest link is the purchase and wholesale of agricultural products. It is a very common phenomenon that the environment of agricultural product wholesale market is dirty and chaotic, and the trading place and transportation process of products cannot meet the requirements of food cold storage at all. Many fruits, vegetables and poultry meat eaten by ordinary people flow to supermarkets and fruit and vegetable stores through wholesale markets with poor environment, and finally to people's dining tables. Experts said that the cold chain standard should represent a general level, and it is best not to involve too many technical issues. However, many parts of China's cold chain standards are decoupled from enterprises and are not suitable for the actual operation of enterprises. operation has created certain obstacles. For example, for the specific restrictions on quick-freezing cold storage, the suitable temperature of different products is different. Too strict temperature restrictions will cause waste of resources. The temperature is determined by customer requirements and different types of food. Judging from the market demand for cold storage, my country's existing cold storage capacity is still very insufficient. The United States currently has 22 million tons of cold storage, nearly 3.3 billion cubic feet. my country now has 9 million tons of cold storage, and China's population is five times that of the United States. China's future cold storage demand is huge. Regarding the future development of China's cold storage, we can refer to and learn from the existing operation mode and development path of foreign cold storage. There are many public cold storages in foreign countries, and users adopt the form of leasing. The expansion of the scale of cold storage construction can effectively save costs. Although my country's cold storage capacity has grown rapidly in recent years, compared with developed countries, there is still a big gap. According to the cold storage capacity, the original state-owned enterprises account for 2/3 of the total capacity, mainly large and medium-sized cold storage, and the storage age More than 30 years. As of 2011, the annual total of various fresh products in my country is about 700 million tons, the annual output of frozen food is more than 25 million tons, and the total output value is more than 52 billion yuan. Obviously, the cold storage capacity of more than 9 million tons is far from enough. All kinds of cold storages in my country, regardless of their size or function, were built according to the mode of civil engineering in the past, and this mode is still dominant. The integration and reconstruction of cold storage resources and the construction of new cold storage. The United States currently has 22 million tons of cold storage, nearly 3.3 billion cubic feet, which is more than twice the area of my country's cold storage. And China's population is five times that of the United States, so it is not difficult to see that China's future demand for cold storage is huge. Regarding the future development of China's cold storage, we can refer to and learn from the

There are many types of compressors used in the commercial refrigeration field, mainly including hermetic piston compressors, semi-hermetic piston compressors, scroll compressors and screw compressors. In terms of quantity, hermetic piston compressors have the largest number, followed by semi-hermetic piston and scroll compressors with similar sales volume, and screw compressors with the least number. According to statistics, in the next few years, the annual growth rate of my country's commercial compressor industry will be about 11%, and large-scale and centralization have become prominent features, so the small number of semi-hermetic screw compressors will become one of the biggest highlights. 1. The role of cold chain logistics is obvious In recent years, my country's economy has entered a stable development track. According to many experts in the industry, adjustment and transformation have become an inevitable trend, and demand structure adjustment is a long-term strategy. Demand structure includes internal and external demand structure, consumption and investment structure in domestic demand. my country's economic growth is mainly driven by the joint action of investment, consumption and export trade, which is called the "troika". Among the "troika", the most stable, most efficient and most sustainable driving force is the consumption of domestic residents. Residents' consumption includes food, clothing, housing, and transportation. Overall, "eating" has become one of the main factors driving consumption. However, compared with developed countries, in terms of food, my country's cold chain logistics hardware transportation equipment and infrastructure are seriously insufficient, and the original facilities are outdated and unevenly distributed, which cannot provide temperature guarantee for cold chain transportation of food circulation. The demand for establishing and improving cold chain infrastructure is becoming unprecedentedly huge, especially the promulgation of the "Agricultural Cold Chain Logistics Development Plan", which clarifies the development direction and determination in the next few years. Further improvement and strong policy support; at the same time, with the process of urbanization and the continuous improvement of living standards, the demand for cold storage in the market, whether it is small, medium or large, is steadily increasing. The country has issued a development plan for the cold chain logistics of agricultural products, and the investment in the food cold chain industry has triggered a new round of rapid rise in the demand for cold chain equipment. Among them, cold storage is a key link in the food cold chain. A number of equipment factory leaders predicted to reporters that the refrigeration industry will have at least five years of good days. 2. Large-scale projects to meet development Nowadays, the construction of cold storage in my country shows several notable characteristics: one is the increase in quantity; And the direction of automatic, flexible and diverse, efficient and safe, environmental protection and energy saving in the loading and unloading of goods in and out of the warehouse. This trend just caters to the use of semi-hermetic screw compressors. It is understood that the biggest advantage of the screw compressor is the large cooling capacity, which is suitable for low temperature cold storage. The characteristics of less wearing parts, long maintenance period, high volumetric efficiency, low exhaust temperature, insensitivity to liquid hammer and stepless adjustment of cooling capacity make screw refrigeration compressors more and more appreciated by users; At the same time, it is also widely used in various sectors of the national economy where artificial refrigeration is required, such as the production of petroleum, chemical, light industry, medicine and other industrial products, low-temperature experiments in scientific research, low-temperature processing, storage and public places of food and aquatic products. Air conditioning in large buildings, etc. 3. Renovation of ammonia machine system shows its skill. Some time ago, a major accident occurred in the main plant of Jilin Baoyuanfeng Company, resulting in heavy casualties and property losses, causing great shock to the society and causing violent turmoil in the cold chain and warehousing industry. Preliminary investigations showed that due to the short circuit of some electrical lines, the surrounding combustibles were ignited, and the high temperature generated by the combustion caused the physical explosion of the ammonia equipment and ammonia pipeline. This is also enough to sound the alarm again for refrigeration practitioners. Therefore, from the beginning of June to the end of September, the government, in the name of the State Council Safety Committee, organized a centralized inspection of production safety for enterprises in all regions and industries across the country and strengthen

As one of the products widely used in public buildings, chillers have attracted the attention of the construction industry. The quality of this "heart" not only determines the normal operation of the air-conditioning system, but also directly relates to the final energy-saving performance and economic benefits of the building. my country's urbanization continues to advance, large-scale construction projects continue to be launched, and urban complexes are blooming everywhere. Various reasons continue to boost the market enthusiasm of chiller equipment manufacturers. In the air-conditioning industry, chillers have long been regarded as the core battlefield for technical competition, hard power display and even the right to speak among manufacturers. After more than 20 years of development, this market is no longer dominated by the five major American brands, Carrier, Trane, York, McQuay and Dunham Bush. Statistics show that although the above-mentioned brands still occupy a certain advantage with a market share of 45%, it is difficult to avoid a "less obvious but continuous" decline. Obviously, domestic enterprises have brought a lot of pressure to the above-mentioned brands in recent years. The rhythm of this pressure is slow but powerful. It is very easy to recall the domestic air conditioner market in my country many years ago, where Chinese and foreign brands fought fiercely, leading each other, but they were almost defeated by domestic giants such as Gree. Unify the world. Whether the central air-conditioning, especially the chiller market will repeat the same mistakes in the future, is intriguing and there are different opinions. American brands are calm about this, and most top managers are not pessimistic. The more common view is that chillers are not the same as household air conditioners. The former has a technical level that is more difficult to reach, and a century of historical accumulation will play a role. In their view, the projects currently involved in domestic enterprises are at the "basic level", and most government projects and fields are still firmly controlled by American brands. This pattern will be maintained for a long time to ensure that the existing share will not shrink. . Huang Bairong, President of Trane China, said that in addition to government and commercial projects, they are committed to digging deeper and establishing advantages in professional fields. For example, in the electronics industry, they have cultivated a large number of top corporate customers, including Lenovo. "This industry requires a high degree of Stable working environment, so the quality requirements for chillers are higher, which can only be achieved by a few companies such as Trane.” However, this view is difficult to obtain domestic enterprises to agree. The relevant person in charge of Gree Electric Appliances Marketing Department told the author that although central air-conditioning currently accounts for only 10% of its overall share, when leaders put forward new growth goals, the development of central air-conditioning business, especially chillers, has become a better choice. , confident to grab more market.” Haier's move is also worth recalling. Since the 2008 Beijing Olympics, Haier has been in a state of disappearance for a long time. Until last year, the maglev chiller acted as the leading force. Haier has invested considerable human and financial resources to publicize it with great fanfare both inside and outside the industry, and its ambition is evident. Expert voices with high expectations Outside the market, many experts in my country's academic field place high hopes on domestic enterprises. "Teaching the barbarian's long skills" is the prescription they prescribed for the latter to win the counterattack. Xu Wei, chairman of the HVAC branch of the Architectural Society of China, said that although there are undeniable gaps in technology, market and human resources, but through cooperation and other methods for reference and learning, it can solve many weaknesses and bottlenecks in its own development process. At present, in addition to doing a good job of "tracking and running", the practical problem that domestic enterprises need to solve is how to gradually gain market recognition, that is, to change the current situation of lack of understanding and distrust of domestic brands in the construction field, and to create more model projects to win the owners. Recognition of quality and value for money. Zong Wenbo, deputy director of the Beijing Satellite Manufacturing Plant, which has recently been promoting integrated refrigeration stations in the industry, said that he often encounters the situation that the construction party, especially large-scale projects, designates the purchase of the five major American brands. There are still doubts about sex. "To break through this vicious circle, of course, you must first harden yourself." He said that building word-of-mouth is a big challe