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Common Problems and Solutions of Liquid Refrigerant in Refrigeration System
1. Migration of liquid refrigerant
Difference between refrigerators and freezers!
It is always confused by a lot of product names, such as freezers, refrigerators and so on when we are buying refrigerated appliances. Why do we always struggle when buying? Which one to buy and which one do we need?
Why does the refrigeration effect of the refrigerator deteriorate after a long time of use?
Some customers react that after using it for several months, they suddenly feel no cooling, or the cooling effect becomes much worse. What's going on?
Advantages and disadvantages of carbon dioxide refrigerant
Carbon dioxide is a substance in nature, and it is also a very good refrigeration substance. In fact, carbon dioxide has been used as refrigerant for a hundred years, and it was widely used from the end of 19t
2022 China international refrigeration and Cold Chain Exhibition (RACC)
2022 Hangzhou international air conditioning, ventilation, refrigeration and cold chain Industry Exhibition (RACC) is one of the most influential professional exhibitions in China. The exhibition is to Zhejiang Refrigeration Industry Base as an advantage, to create a new China International Business Card as the goal, by Zhejiang provincial governments at all levels of strong support. Sponsored by the China Council for the Promotion of International Trade, the China Council for the Promotion of Inte
Scientists put forward a new idea of "green refrigeration"
The team of Hefei Institute of solid research, Chinese Academy of Sciences broke through the traditional thinking of "solid-solid" phase change refrigeration material research, put forward the innovative idea of "realizing refrigeration effect through hydrostatic driving liquid-solid transformation" (liquid-solid), and obtained room temperature Pang pressure card effect in n-alkane system, opening up new ideas f
Kula launches R134a refrigerant substitute with low GWP
According to foreign media reports, refrigerant manufacturer Koura (Kula) has launched a new low global warming potential refrigerant substitute R134a in the existing automotive air conditioning systems in the UK and Europe.
Dear exhibitors and delegates: China refrigeration, air conditioning, heat pump, ventilation and cold chain Equipment Expo (hereinafter referred to as China cold Expo) has become the "just need of the annual meeting of the refrigeration industry" that refrigeration people do not want to miss with the advantage of high return.
Principles of commodity display
The commodity display of a store is an important form of store advertising. The work ef
Basic knowledge of refrigeration maintenance 5-1
1. Suction temperature too high High suction temperature is mainly caused by the increase of suction superheat. Note that high suction temperature does not mean high suction pressure, because suction is super
Three common technologies of refrigeration compressor
The compressor for supermarket display cabinets mainly adopts three technologies: Piston refrigeration compressor is the most common compressor on the market, Available in all configurat
Several reasons for frequent startup of refrigeration compressor
Several reasons for frequent startup of refrigeration compressor The compressor in operation is started and stopped by high-voltage and low-voltage relays, but after most high-voltage relays jump, they must b
Basic knowledge of refrigeration maintenance 5-2
2. Suction temperature too low The low suction temperature is mainly caused by the low suction superheat caused by the large liquid supply of the evaporator. Reason for low suction temperature: ·Too much refrigerant is charged
Basic knowledge of refrigeration maintenance 5-3
3. Abnormal exhaust temperature The compressor exhaust temperature can be read out from the thermometer on the exhaust pipeline. It is related to the adiabatic index, compression ratio and suction temperature of refrigerant. The main reasons for the incr
Basic knowledge of refrigeration maintenance 5-4
4. High exhaust pressure The high exhaust pressure is mainly caused by the high condensation pressure, rather than the compressor itself. The exhaust pressure generally corresponds to the condensation temperature. Under normal conditions, the discharge pressure of the compressor i
Basic knowledge of refrigeration maintenance 5-5
5. Exhaust pressure too low The low exhaust pressure is mainly caused by the small or even stop of refrigerant flow in the refrigeration system pipeline. The exhaust pressure is too low.
On December 3, the Ministry of industry and information technology issued the 14th five year plan for industrial green development to comprehensively improve the level of green manufacturing and reduce carbon dioxide emissions per unit of industrial added value by 18% by 2025. The content specifically points out that by 2025, it is required to achieve remarkable results in the green and low-
Common causes of severe frosting of compressor in cold storage
1. Frosting at the compressor return port indicates that the compressor return gas temperature is too low, so what will cause the compressor return gas temperature to be too low? We all know that if the volume and pr
The 13 most common faults of compressor!
The air conditioning system has four major parts: compressor, condenser, evaporator and throttling components. Today, let's share the knowledge about the most common faults of compressor. 1. The
Analysis on welding defects and causes of copper pipe
I. welding instructions When brazing pipes, the joint gap has an effect on the strength of the joint. The gap is too small, and the solder can not enter the gap well, resulting in insufficient s
Refrigerant summary, all the refrigerants you want to know are here!
1. R134a (tetrafluoroethane) refrigerant R134a is currently internationally recognized as one of the main refrigerants to replace R12. It is commonly used in vehicle air conditioning, commercial and industrial refrigeration systems, as a foaming agent for the production of hard plastic insulation materials, and can also be used to configure other mixed refrigerants, such as R404A and R407C. Main uses: it mainly replaces R12 as refrigerant and is widely used in automobile air conditioning and refrigerator refrigeration.
Better use of fresh-keeping cabinet!
When using the refrigerated display cabinets, not only fresh-keeping vegetables and fruits, but also fresh-keeping cabinet has a better use method. When using the fresh-keeping cabinet, you can also save fresh milk. In this way, when using the fresh-keeping cabinet, you will have a better use method. Therefore, when using the fresh-keeping cabinet, you should have a good use method.
Classification of freezer compressors
Freezer freezer compressor is the core equipment in the refrigeration system. Only by converting electric energy into mechanical work and compressing low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gas, can the refrigeration cycle be guaranteed. In the steam compression refrigeration system, the refrigeran
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