Cryogenic workshop solution

The air conditioning system requirements are relatively high, resulting in the difficulty of system design is relatively large, in order to meet the needs of actual production, Sheng Li refrigeration presents a low temperature purification air conditioning system solutions.
Design principles of air conditioning system in low temperature purification workshop
The air cleanliness of the clean room in the low temperature purification workshop should meet the requirements of the production process to clean the production environment. For the strict requirements of noise reduction, location, large area of the workshop, to design a centralized purification air conditioning system, in addition to the design of components can be dispersed purification air conditioning system. Air conditioning system design in order to meet the requirements of low temperature purification workshop production process, in line with GB50189 - 2005 public building energy efficiency design standards, advocate energy conservation and environmental protection, efficient use of resources. Under the premise of ensuring the fresh air volume and the pressure difference of the purification workshop, try to do as much as possible
Using return air to reduce workshop temperature. If the return air contains a high concentration of dust, it is necessary to set up a high efficiency filter on the return air and return air duct. The electric heater in the air conditioning system of the low temperature purification workshop should be placed on the upper side of the high efficiency filter, and should be equipped with the corresponding fire safety measures.
Two, low temperature purification workshop air conditioning system design and method
1 determine the design
To meet the requirements of the production workshop on low temperature purification adds some difficulty to the design of the air conditioning system, if according to the conventional method in the workshop is arranged inside the evaporator coil to meet the requirements of the production process at room temperature, the freezing phenomenon will often appear on the coil, so that it will affect the cleanliness of the workshop. To this end, the need for low temperature clean air conditioning system.
2 low temperature clean air conditioning design method
(1) to determine the specific conditions of the workshop: workshop temperature, the number of personnel, production processes, such as the envelope structure.
(2) determine the fresh air volume and fresh air source of air conditioning system.
(3) the choice of surface cooler, the general use of direct evaporation.
(4) the type selection of the unit, with automatic defrosting device, and at the location of the air inlet is also equipped with a primary filter. As far as possible to meet the requirements of the cleanliness of the workshop air conditioning,
(5) the design of air supply system, in the design of low temperature air conditioning system in the process of installation of the air filter of air conditioner, the mezzanine ceiling and will send wind pipe set in the room in the air using the diffuser Aluminum Alloy material, installed in the ceiling, and the corresponding set electric control valve, can directly adjust wind quantity, air return device is used; the net type Aluminum Alloy material inlet, the lower part of the device in the room, return riser all embedded in the wall, and return air and interlayer dry pipe connected to air and return air pipe are respectively arranged on the valve stem tube. In addition, the air supply duct and the return air duct are equipped with good thermal insulation facilities.
(6) after the completion of the system design, in the process of debugging, the external envelope structure of the workshop is optimized, and the commissioning and trial operation are carried out repeatedly, so that the room temperature can meet the design requirements.