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Common refrigerant charging methods for central air conditioners

Common refrigerant charging methods for central air conditioners In practical applications, the following methods are often used to detect whether the refrigerant in the refrigeration system is sufficient. Let's analyze the drawbacks of these charging methods: 1, touch the suction pipe and exhaust pipe with your hands to sense the cold and heat of the copper pipe; 2, observe the bubbles in the sight glass; 3, measure high and low pressure; 4, measure the compressor current; 5, calculate the degree of superheat; 6. ​​Observe the condensation on the suction pipe; 7. Weigh the punch. 1. Touch the suction pipe and exhaust pipe to sense the heat and cold of the copper [...]

By |September 3rd, 2020|Categories: Uncategorized|0 Comments

Market analysis of China’s cold storage manufacturing industry.

Market analysis of China's cold storage manufacturing industry. Cold storage is one of the important infrastructures in the cold chain logistics industry. In recent years, the number of cold storage in my country has increased, but it is still insufficient compared to the huge market demand. According to data from China Internet of Things, the national cold storage demand in the first half of 2018 exceeded 1.5 million square meters, a year-on-year increase of 14.9%. At present, the domestic demand for cold storage is mainly concentrated in Beijing, Shanghai, Guangzhou and Shenzhen, as well as Fujian, Tianjin, Zhejiang, Jiangsu, Shandong, Chongqing, Henan and other places. Market analysis of China's cold storage [...]

By |August 21st, 2020|Categories: Uncategorized|0 Comments

Key points for the use of chillers

Key points for the use of chillers Water chiller is a kind of cooling water equipment that can provide constant temperature, constant current and constant pressure. The working principle of the chiller is to inject a certain amount of water into the water tank in the machine, and then cool the water through the chiller refrigeration system, and then the low-temperature cooling water is sent to the equipment to be cooled by the water pump, and the chilled water takes the heat away after the temperature It is raised and then returned to the water tank to achieve cooling. So what are the Key points for the use of chillers when [...]

By |August 20th, 2020|Categories: Uncategorized|0 Comments

International cold chain logistics will usher in a period of stagnation

International cold chain logistics will usher in a period of stagnation International cold chain logistics will usher in a period of stagnation. In the first half of the year, the new crown epidemic has caused the international cold chain logistics market to shrink to a freezing point. Local customs supervision and inspection and quarantine have reached unprecedented strict standards. However, the special nature of imported cold chain products has made it impossible to comprehensively detect and judge whether there is a new crown virus. Since July, imported fresh products have been tested positive for the new crown virus in nine cities and ten places, but the relevant departments have not made [...]

By |August 19th, 2020|Categories: Uncategorized|0 Comments

U.S. makes final ruling on anti-circumvention of HFC refrigerants

U.S. makes final ruling on anti-circumvention of HFC refrigerants On May 29, 2020, the U.S. Department of Commerce issued an announcement stating that it has made a definite final anti-circumvention ruling on hydrofluorocarbon blends imported from China, ruling that non-patent R-421A hydrofluorocarbon (HFC) imported from China ) The mixture is further processed in the United States to produce hydrofluorocarbon refrigerants (including R-404A, R-407A, R-407C, R-410A and R-507A) to circumvent current anti-dumping measures. U.S. makes final ruling on anti-circumvention of HFC refrigerants Based on the above affirmative final ruling, the US Department of Commerce will instruct the US Customs and Border Protection to continue to collect anti-dumping cash deposits for [...]

By |August 18th, 2020|Categories: Uncategorized|0 Comments

The export of refrigerators and freezers increased significantly

In the first five months, the export of refrigerators and freezers to the American market increased significantly Under the influence of the epidemic in 2020, the overall home appliance industry chain is sluggish, but the performance of refrigerators and freezers has been remarkable, especially in the export market. From January to May this year, my country’s exports of refrigerators and freezers increased by 3.2% year-on-year. Among them, the export of refrigerators and freezers to the Americas increased by 28.7%, followed by Oceania, which also increased by more than 25%. The export of refrigerators and freezers increased significantly From the perspective of TOP10 countries exporting to the Americas, both the [...]

By |August 17th, 2020|Categories: Uncategorized|0 Comments

Why is the low-temperature industrial water chiller slow.

Why is the low-temperature industrial water chiller slow. When it comes to low-temperature industrial chiller equipment, many of my friends may know that low-temperature industrial chiller products are a type of professional refrigeration equipment that is widely used in domestic industrial production. Many industrial production requires the help of low-temperature industrial chillers. To achieve industrial low-temperature environment, sometimes during the operation of low-temperature industrial chillers, slow operation often occurs. The relevant technicians can use their own maintenance knowledge to carry out preliminary treatment. For example, the assembly and disassembly of the compressor of the unit, the cleaning and maintenance of the refrigeration system, the addition of refrigerant, the debugging and maintenance [...]

By |August 5th, 2020|Categories: Uncategorized|0 Comments

The central air-conditioning industry under the coronavirus

The central air-conditioning industry under the coronavirus The current coronavirus situation is an unusual year for all HVAC staff. Whether in terms of engineering or retail, under the multiple pressures of the global economic environment, national policy regulation, regional economic planning, and market funds, the development of the industry has changed. Had to falter. Many companies are not optimistic about the situation in the first quarter and the first half of 2020. The sharp decline is their unified perception. What was supposed to be the first sales explosion in the market in 2020 was unpreparedly dissipated by the epidemic. It is foreseeable that the central air-conditioning industry will change again in [...]

By |August 4th, 2020|Categories: Uncategorized|0 Comments

UN report: Post-coronavirus recovery plan should include improvements to global refrigeration systems

UN report: Post-coronavirus recovery plan should include improvements to global refrigeration systems [China Refrigeration Network] A reporter learned from the United Nations Environment Program on the 19th that the latest report "Refrigeration System Emissions and Policy Comprehensive Report" jointly issued by the United Nations Environment Program (UNEP) and the International Energy Agency (IEA) pointed out that if global coordination is adopted Consistent action to promote the transformation of energy-saving and climate-friendly refrigeration will avoid up to 460 billion tons of greenhouse gas emissions in the next 40 years-if the 2018 global emissions level is used as a reference value, it is equivalent to 8 years of global emissions. Post-coronavirus recovery plan [...]

By |August 3rd, 2020|Categories: Uncategorized|0 Comments

Industrial chiller installation requirements

Industrial chiller installation requirements Industrial chiller installation requirements: 1. Power supply (1) The power supply of the chiller adopts three-phase four-wire, the power line (R, S, T) is connected to the live line, (N) is connected to the neutral line, and (G) is grounded. (2) The perforation on the electric control box of the main power cord of the unit is connected to the connecting post in the box to ensure the connection is tight. (3) Power distribution requirements for the unit: main power supply voltage: within ±10% of the rated voltage. (4) When the main power supply voltage fluctuation exceeds the specified range, the chiller is not allowed to start, otherwise [...]

By |July 31st, 2020|Categories: Uncategorized|0 Comments

Several key factors for choosing a chiller

Several key factors for choosing a chiller Faced with many chiller brands and specifications on the market, many people don’t know how to choose the right chiller. In fact, before choosing a chiller, you must first have a comprehensive understanding of the chiller. These 6 key points Factors need to be known. 1. Determine the amount of ice used according to your own scale and development plan, and determine the machine model based on the amount of ice used. If you buy a larger machine, it will be a waste of resources, and if the small machine is not enough ice cubes ; Generally speaking, the output label of the chiller [...]

By |July 30th, 2020|Categories: Uncategorized|0 Comments

GESON low-temperature chiller helps fermentation industry

GESON low-temperature chiller helps fermentation industry The fermentation industry is a key link in the industrialization of biotechnology. It has a long history. The modern microbial fermentation industry combines new technologies such as genetic engineering and cell engineering. From the perspective of industrial structure, the fermentation industry has the characteristics of low investment, quick results, and low pollution, and is an important part of the global economy.GESON low-temperature chiller helps fermentation industry. In the development of the ecological fermentation industry, the development and production of fermentation products cannot be separated from new and efficient fermentation equipment and supporting special equipment, which play a vital role in the fermentation industry.GESON low-temperature chiller [...]

By |July 29th, 2020|Categories: Uncategorized|0 Comments

Accurate selection of industrial chillers needs to meet 6 conditions

Accurate selection of industrial chillers needs to meet 6 conditions The accurate selection of industrial chillers needs to meet 6 conditions. When we need to buy industrial chillers, the selection becomes an important issue. If you choose a larger one, it will waste material resources, and if you choose a smaller one, it will not achieve the desired cooling effect. In order to accurately select industrial chillers, let’s analyze it by GESON CHILLER! There are many kinds of refrigeration equipment in daily use, but the application range of chillers is relatively wide. It can control the temperature within a specific range, and the refrigeration effect is stable, suitable for use in [...]

By |July 27th, 2020|Categories: Uncategorized|0 Comments

The main reason for the performance decline of the centrifugal unit (3)

The main reason for the performance decline of the centrifugal unit (3) The main reason for the performance decline of the centrifugal unit is Non-condensable gas, Cooling water and cold water. 1. Non-condensable gas   The unit with R11 and R123 as the refrigerant is a negative pressure unit, and the compressor inlet is in a vacuum state. When the unit is running, overhauled or shut down, water, air or non-condensable gas will inevitably penetrate into the unit. If it is not eliminated in time, it will cause the pressure at the top of the condenser to rise sharply, resulting in a decrease in cooling capacity and an increase in power consumption. [...]

By |July 24th, 2020|Categories: Uncategorized|0 Comments

The main reason for the performance decline of the centrifugal unit (2)

The main reason for the performance decline of the centrifugal unit (2) The main reason for the performance decline of the centrifugal unit is Lubricating oil . Lubricating oil is also called refrigerating machine oil. It lubricates the various moving parts of the compressor, which not only reduces friction and wear, but also plays a cooling role, keeping the moving parts at a lower temperature and improving efficiency. The influence of lubricating oil on refrigerant performance is mainly manifested in the following aspects. lubricating oil   Lubricating oil is also called refrigerating machine oil. It lubricates the various m ①Thermal performance. After the oil is dissolved in the refrigerant, the thermal [...]

By |July 23rd, 2020|Categories: Uncategorized|0 Comments

The main reason for the performance decline of the centrifugal unit (1)

The main reason for the performance decline of the centrifugal unit (1) After the unit runs for a long time, there will be phenomena such as failure to operate at full load, surge, low evaporation temperature, high condensation temperature, and high motor current, which will cause its cooling capacity to decline. The main reasons for the performance degradation of the unit are the changes in the chemical and thermal properties of the refrigerant, the deterioration of the lubricating oil, the excessive thermal resistance of the heat exchange surface, the poor system sealing, and the mutual penetration of the refrigerant system and the water system. The main reason for the performance [...]

By |July 22nd, 2020|Categories: Uncategorized|0 Comments