Clean room should be equipped with air conditioning system: different use time; different temperature and humidity benchmarks and allowable fluctuation range; different noise standards require different air conditioning areas with muffling requirements and noise generation; different air cleanliness standards require different requirements; air conditioning areas requiring heating and cooling need to be used together, which should be high standards for air conditioning areas. Seek to do. The air-conditioning and air-conditioning systems in the air-conditioning areas with different local demands will be difficult to control and influence the use. Therefore, the air-conditioning and air-conditioning systems should be set up separately to emphasize the different needs of the air-conditioning and air-conditioning systems. When individual local standards are higher than those required in other major air-conditioning and air-conditioning areas, the setting of clean air-conditioning systems will reduce the cost of the systems The air conditioning system can be shared; the air conditioning area with higher standard should be treated, just as the air conditioning area with different requirements for cleanliness or noise in the first air system, the air conditioning area with higher requirements for cleanliness or noise should be treated with filters or mufflers that meet the requirements.
The design of all-air air conditioning system should conform to the following: single air duct system; primary return air system should be adopted when the temperature difference of supply air is large. When the temperature difference of air supply is small and the relative humidity requirement is not strict, the secondary return air system can be used. Except in the air conditioning area where temperature and humidity fluctuations are strictly required, heating and cooling processes shall not be carried out simultaneously in the same air handling system. The air supply temperature of air conditioning system is the way of hot water and cold water flow, but the complex control system of primary and secondary air return ratio is not often changed. At the same time, because the change of primary and secondary air return ratio will affect the stability of indoor relative humidity, it is not suitable for a large number of air conditioning areas with stricter moisture and humidity requirements, so it is not suitable for air conditioning areas. On the premise of heat, the general engineering system is recommended as a simple and easy-to-control return air system. Lower air supply mode or clean room air conditioning system makes the temperature difference between air supply and air supply smaller. Secondary return air system can be used to avoid cooling heat bias caused by system reheat. In general, in addition to air conditioning technology with strict fluctuation range of temperature and humidity, the same air handling system should not increase the heat and cold process, because the heat and cold offset each other, which does not meet the principle of energy saving. Zhongjing Global Purification can provide ancillary services such as clean room, clean room consultation, planning, design, construction, installation and transformation.
The design of VAV air conditioning system should conform to the following requirements: air conditioning area should be divided according to building module and load change; system form should be determined by comparing technology and economy according to the division of air conditioning service area, service time, load change, etc. Variable air volume terminal device should be pressure independent; measures should be taken to ensure minimum fresh air demand; maximum volume air supply air conditioning area and system should be determined according to summer cooling load; minimum air supply air conditioning area should be determined according to load change and air distribution, etc. Fan strain speed regulation. When the inner zone uses the year-round variable air volume air conditioning system independently, the outer zone can set fan coil unit air conditioning system and constant air volume air conditioning system according to the load characteristics of the outer zone air conditioning. When the VAV air conditioning air handling device is used together in the internal and external areas, the type of single-channel VAV air conditioning terminal device can be used in the internal areas, while the VAV air conditioning terminal equipment and reheater set the external areas according to the characteristics of air conditioning load. When variable air volume air handling units are installed in the inner and outer areas, the inner units only need year-round refrigeration, while the outer units need seasonal refrigeration or heat transfer. At the same time, according to the direction, the air handling unit is set up in the outer area to ensure that the conversion time of each terminal equipment in each system is the same. There are many types of equipment at the end of VAV air conditioning system. According to whether or not the pressure change of compensation system can be divided into two types: independent type and pressure type. When the pressure changes in the pressure-independent pipe system at the end, the air volume change caused by the pressure change is detected and the feedback controller is terminated. The controller compensates the air volume by adjusting the opening of the valve. The change has no effect on the pressure of the current main transformer air flow terminal device.
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