Auxiliary equipment in refrigeration system play an important role in ensuring stable and efficient performance of the system, contributing to increasing the service life and minimizing problems. They include equipment that supports refrigerant treatment, pressure control, oil separation, water separation, and many other functions. The selection and installation of appropriate refrigeration system accessories is a key factor in building an efficient and reliable refrigeration system.
This article Tan Long will provide a detailed overview of the auxiliary equipment in the refrigeration system, helping you better understand their features, structure and applications.
Auxiliary equipment in refrigeration system
Auxiliary equipment in refrigeration system are indispensable components, ensuring the system operates stably, efficiently and safely. They are responsible for separating oil, separating water, regulating pressure, storing refrigerant, and performing many other functions. Having a solid understanding of the auxiliary equipment in the refrigeration system is extremely necessary for technicians, operators and those interested in the field of industrial refrigeration.
Oil separator

The oil separator is one of the very important auxiliary equipment in the refrigeration system, which has the task of separating oil from the refrigerant. Lubricating oil is an essential component in the refrigeration compressor, but if mixed with the refrigerant, it will reduce the cooling efficiency and cause many other problems.
The oil separator works on the principle of using the difference in specific gravity between oil and refrigerant. Refrigerant and oil are fed into the separator, where the oil will separate from the refrigerant and settle to the bottom of the separator due to its larger specific gravity.
The refrigerant after being separated from oil will be led to other devices in the system, while the separated oil will be stored in a separate oil tank. The oil separator is usually designed with the following important parts:
- Body: Made of steel or other high strength, pressure resistant, corrosion resistant materials.
- Oil separator: Filter or centrifuge design for effective oil separation.
- Oil drain valve: Allows oil to be drained from the tank easily.
- Connection port: Used to connect to pipe sections in the refrigeration system.
Oil tank

The oil tank is one of the auxiliary equipment in refrigeration system has the role of storing and supplying lubricating oil to the refrigeration compressor. Lubricating oil plays a very important role in reducing friction, cooling and protecting the internal parts of the compressor. The oil tank helps ensure that there is always enough oil needed to lubricate the compressor, while also helping to separate the oil from the refrigerant in the system.
Oil tanks are typically designed with the following main components:
- Body: Made of steel or similar material, resistant to high pressure and temperature.
- Oil supply port: Connect to the refrigeration compressor to receive oil.
- Oil drain port: Use for regular oil changes or as needed.
- Fuse: Used to protect the oil tank in case of excessive pressure.
- Oil level gauge: Helps operators easily check and adjust the amount of oil in the tank.
Using the right oil tank helps the refrigeration system operate stably, minimizes damage and prolongs the life of the compressor. Choosing an oil tank with a capacity suitable for the capacity and type of compressor of the system is important.
Types of containers

Auxiliary equipment in refrigeration system As the receiver plays an important role in storing, separating, and regulating the refrigerant. The receiver is used in many parts of the system, providing optimal refrigeration efficiency.
High pressure tank
High pressure tank is one of the auxiliary equipment in refrigeration system used in refrigeration systems with high working pressure. The high pressure tank has the task of storing the refrigerant in a liquid state, at high pressure, before being introduced into the expansion unit for expansion.
High pressure tanks are designed to withstand high pressure, usually made of stainless steel or other high-strength materials. High pressure tanks are often equipped with safety devices such as safety valves and pressure gauges to ensure safe operation.
High pressure tank plays an important role in the refrigeration process, maintaining stable pressure and refrigerant flow before entering the throttle. It is necessary to choose a high pressure tank with technical specifications suitable for the refrigerant and working pressure of the system.
Circulating tank
The circulating tank, also known as the intermediate tank, is one of the auxiliary equipment in refrigeration system plays an important role in the circulating refrigeration system. It is used to contain the refrigerant in liquid form, and then circulated through the evaporator to cool the air or liquid.
The circulating tank can be designed vertically or horizontally, depending on the requirements of the system. This tank is usually made of heat-resistant, high-pressure materials and is equipped with safety devices such as safety valves and pressure gauges.
The circulating tank helps maintain the stability of the pressure and flow of refrigerant in the system, ensuring the best cooling performance. The selection of the circulating tank should be based on the system capacity, refrigerant flow, and other technical parameters.
Recovery tank
The recovery tank is one of the auxiliary equipment in refrigeration system used to recover refrigerant from other equipment in the system. The recovery tank plays an important role in preventing refrigerant leakage into the environment, protecting the environment and ensuring operator safety.
Recovery tanks are typically designed with valves, pressure gauges and other devices to control and recover the refrigerant safely and efficiently.
The recovery tank is an important part of the refrigeration system, helping to minimize the impact on the environment, ensuring the safety of people and equipment. The use of recovery tanks makes the refrigeration system more environmentally friendly and efficient.
Liquid separator

The liquid separator is one of the auxiliary equipment in the refrigeration system used to separate the liquid refrigerant from the vapor-liquid mixture. The liquid separator plays an important role in ensuring that only the liquid refrigerant is fed into the condenser, thereby improving the cooling efficiency of the system.
The separator is usually designed with a separate separator, which separates the liquid refrigerant from the mixture. The separated vapor is sent to the compressor, while the liquid refrigerant is sent to the condenser.
Separators are an integral part of many refrigeration systems, especially large capacity systems where cooling efficiency is critical. Selecting the right separators for your system specifications is essential to ensure optimum cooling performance.
Intermediate tank

The intermediate tank is one of the auxiliary equipment in refrigeration system used as an intermediate point for storing and regulating refrigerant. The intermediate tank is usually installed between the compressor and the evaporator, or between the condenser and the expansion valve.
The intermediate tank plays an important role in stabilizing the pressure and flow of refrigerant in the system. It can also be used to separate oil from refrigerant or to contain filter elements.
Intermediate tanks are usually made from high pressure, heat-resistant and durable materials. Choosing the right intermediate tank for your system requirements is important to ensure efficient operation.
Non-condensable gas separator

Non-condensable gas separator is one of the auxiliary equipment in the refrigeration system designed to remove non-condensable gases from the refrigerant. Non-condensable gases are gases that cannot be liquefied at the operating temperature and pressure of the refrigeration system, they can reduce the refrigeration efficiency and cause other problems.
Non-condensable gas separators work on the principle of separating gases from the refrigerant mixture based on the difference in boiling temperature. Non-condensable gases have a lower boiling temperature than the refrigerant, so they will be separated from the refrigerant and released to the outside.
Non-condensable gas separators are usually designed with separate separation parts, which effectively separate non-condensable gases. Using a non-condensable gas separators helps to improve the cooling efficiency of the system, prolong the life of the compressor and ensure the safety of the operator.
Benefits of using auxiliary equipment in refrigeration systems

In refrigeration systems, auxiliary equipment plays an important role in supporting operations, increasing efficiency and protecting the system. Below are the specific benefits of using auxiliary equipment in refrigeration systems:
- Increase system efficiency: Equipment such as oil separators and liquid separators help maintain the amount of oil and refrigerant at optimal levels, ensuring stable operation.
- Compressor protection: Using high pressure, low pressure tanks and liquid separators helps avoid compressor damage due to inappropriate pressure or refrigerant.
- Reduce energy loss: Oil separator and heat recovery tank reduce energy loss during operation, saving electricity.
- Increase system life: Devices such as safety valves and stop valves protect the system against the risk of abnormal pressure increases or refrigerant leaks.
- More precise control: Using a temperature, pressure or expansion valve controller helps to better manage the refrigeration process, keeping the temperature stable.
- Prevent system congestion: Moisture and oil filters help remove moisture and dirt, keeping the system clean and unclogged.
- Improve safety: Auxiliary devices such as relief valves and pressure sensors ensure safety during system operation.
- Easy to maintain and repair: Auxiliary equipment supports monitoring, periodic maintenance, and early detection of problems in the refrigeration system.
Proper installation and use of auxiliary equipment in the refrigeration system not only ensures operating efficiency but also helps prolong the life and increase the safety of the system.
Notes when choosing auxiliary equipment for refrigeration systems

The selection of auxiliary equipment in the refrigeration system must be done carefully to ensure the system operates stably and efficiently. Below are important notes when selecting auxiliary equipment:
- Determine the right type of equipment to use: Includes devices such as throttle valves, condensers, filters, pressure sensors, safety valves.
- Make sure the device is compatible with the system: Select equipment with specifications suitable for the capacity and size of the refrigeration system.
- Prioritize high quality materials: Equipment needs to be made of durable materials, resistant to high temperatures and pressures, and to limit damage.
- Choose equipment with quality standard certification: Equipment must meet safety and quality standards such as ISO, CE.
- Choose a reputable supplier: Should buy from reputable manufacturers or distributors to ensure origin and warranty service.
- Check for serviceability and replacement: Equipment should be easy to disassemble, maintain or replace when necessary.
- Pay attention to energy consumption: Choose energy-efficient equipment to reduce operating costs and increase efficiency.
- Consult a professional technician for guidance: They will give suggestions that best fit the existing system.
Correct selection of refrigeration system accessories increases system life and ensures optimal performance.
Conclude
Auxiliary equipment in the refrigeration system plays an important role in ensuring the system operates stably, efficiently and safely. Choosing and installing the right type of auxiliary equipment suitable for each refrigeration system is a decisive factor in the cooling efficiency and life of the equipment.
Understanding the function, structure and operating principles of each sub-device in the refrigeration system is extremely necessary for technicians, operators and those interested in the field of industrial refrigeration. Hopefully this article has provided you with useful and complete knowledge about the sub-devices in the refrigeration system, helping you make the most suitable and optimal choices for your refrigeration system.
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