In the field of purification equipment, especially in cleanrooms, professional terms like MAU, AHU, RCU, DDC, FCU, DHU, PAU and FFU are often heard. These devices play a crucial role in maintaining the environment of cleanrooms. Today, let's unveil the mystery of them together.

The MAU is mainly responsible for introducing fresh outdoor air and pre-treating it to meet the requirements of temperature, humidity and cleanliness in the cleanroom. It can filter impurities such as dust, pollen and bacteria in the air, and at the same time adjust the temperature and humidity of the air, providing a stable and high-quality fresh air source for the workshop. It ensures that there is sufficient fresh air supply for the personnel in the workshop and maintains good indoor air quality and comfort. This is a very critical first step for industries with high requirements for air quality, such as electronics, pharmaceuticals and food.

The AHU is a device for centralized treatment of air, integrating multiple functions such as air filtration, heating, cooling, humidification and dehumidification. In the cleanroom, the AHU receives the pre-treated fresh air from the MAU and the return air in the workshop, and further finely processes the mixed air to meet the specific requirements of temperature, humidity, cleanliness and air distribution in various areas of the workshop. Then, it transports the processed air to all parts of the workshop through the air duct system to ensure the stability and consistency of the entire workshop environment. It is widely used in the central air-conditioning systems of various industrial plants and commercial buildings.

The RCU is a key component for accurately controlling the environmental parameters of each room in the cleanroom. It can monitor parameters such as temperature, humidity and pressure in the room, and automatically adjust the operating status of the connected air-conditioning equipment (such as AHU, FCU, etc.) according to the preset control logic, so as to achieve precise control of the room environment. Through the RCU, operators can easily set and adjust the environmental parameters of the room. Meanwhile, it also has functions such as fault alarm and data recording, which helps to detect and solve problems in a timely manner and ensure the continuity and stability of workshop production. It plays an indispensable role in modern intelligent buildings and purification workshops.

The DDC is a microprocessor-based controller that directly performs digital control on various devices in the air-conditioning system. In the cleanroom, the DDC can receive signals from various sensors (such as temperature sensors, humidity sensors, pressure sensors, etc.). After internal calculation and processing, it directly outputs control signals to adjust the operating parameters such as the fan speed and valve opening of devices like MAU, AHU and FCU, so as to achieve precise control of the environmental parameters such as temperature and humidity in the workshop. The DDC has the advantages of high control accuracy, strong reliability, easy programming and debugging, and it can also realize remote monitoring and management through the network, greatly improving the intelligent level and operating efficiency of the air-conditioning system. It is a core component of the modern intelligent building control system.

The FCU is usually installed in each room of the cleanroom. It mainly consists of a fan, a coil and an air filter. Cold water or hot water circulates through the coil. When the fan operates, it drives the indoor air to flow through the surface of the coil to heat or cool the air and thus adjust the temperature of the room. The FCU is also equipped with an air filter, which can preliminarily filter the indoor air, remove some dust and impurities and improve the indoor air quality. The FCU has the characteristics of compact structure, convenient installation and independent control. It is suitable for various room layouts and usage requirements and is widely used in small cleanrooms or places with high requirements for local temperature control.

In some cleanrooms with very strict requirements for air humidity, such as in the fields of electronic chip manufacturing and precision optical instrument production, the DHU plays an important role. It is specifically used to add moisture to the air to precisely control the humidity level in the workshop. The DHU adopts advanced humidification technologies, such as steam humidification and ultrasonic humidification. It can provide a stable and precise humidification amount according to the humidity requirements of the workshop, avoiding adverse effects on product quality and production processes caused by dry air, and ensuring that the production process is carried out in a suitable humidity environment to guarantee the high precision and high reliability of products.

The PAU is mainly used for pre-cooling or pre-heating the air entering the cleanroom. Under different seasons and climate conditions, the temperature of outdoor air varies greatly. By pre-adjusting the temperature of the air through the PAU, the load on the subsequent MAU and AHU can be reduced, and the energy utilization efficiency of the entire air-conditioning system can be improved. For example, in winter, the PAU can preheat the cold outdoor air to increase its temperature before it enters the MAU for further treatment; in summer, the PAU pre-cools the hot outdoor air to reduce its temperature, thereby reducing the cooling energy consumption of the air-conditioning system, saving energy costs for enterprises and ensuring that the temperature in the workshop is stabilized within a suitable range.

The FFU is a key device for realizing a locally high-cleanliness environment in the cleanroom. It is usually installed on the ceiling of the cleanroom. It consists of a high-efficiency filter and a fan. The fan sucks in the air and filters it through the high-efficiency filter, and then sends the clean air evenly into the working area in a vertical downward direction, forming a laminar air flow, effectively preventing pollutant particles such as dust from entering the working area and ensuring the high cleanliness requirements of the working area. The FFU has the advantages of modular design, convenient installation, easy maintenance and expansion. It is widely used in industries with extremely high requirements for cleanliness, such as electronics, semiconductors and biopharmaceuticals, and is an important part of building high-quality cleanrooms.

The above is a brief introduction to these key devices such as MAU, AHU, RCU, DDC, FCU, DHU, PAU and FFU in cleanrooms. They each undertake different functions and cooperate with each other to jointly create a stable, clean and comfortable production environment for cleanrooms, meeting the strict requirements of various high-tech industries and precision manufacturing industries for the production environment and promoting the development of modern industry towards higher precision and higher quality.

If you have more questions and needs about purification equipment or cleanrooms, please feel free to contact Guangzhou Cleanroom Construction Co., Ltd. We will serve you wholeheartedly!