Ventilation air conditioning construction specifications
The main function of ventilation air conditioning is to provide the oxygen needed for human respiration, dilute indoor pollutants or odors, exclude pollutants produced by indoor processes, remove residual heat or humidity indoors, and provide indoor combustion of the air needed, mainly in the home, business, hotels, schools and other buildings.
1. air filtration requirements are different, the general air conditioning system using a two-tier filtration, and ventilation and air conditioning must be set up three and more than three-tier filters;
2. control of indoor pressure, general air conditioning system has no obvious requirements for indoor pressure, and purification of air conditioning systems to maintain the pressure difference between the clean room has a clearly defined;
3. airflow organization, the general Air conditioning system in order to achieve a small amount of ventilation as much as possible to improve the uniformity of the indoor temperature and humidity field of the purpose of the ventilation and air conditioning system to ensure that the required cleanliness, must try to limit and reduce the diffusion of dust particles flying, so that the dust particles quickly discharged outdoors;
4, the number of times of ventilation, ventilation and air-conditioning system must be a minimum of the number of times of ventilation must reach 10 times / h, and even up to hundreds of times.
Ventilation and air-conditioning engineering construction should pay attention to the civil engineering, decoration works, electromechanical installation of other specialized projects and equipment suppliers to coordinate with.
For example: with the civil reserved, buried, pay attention to the reserved holes, holes in the shape, size and location, the location and size of the buried parts, etc.; all types of piping and construction of a comprehensive arrangement of the order of determination; in time for the electrical profession to provide the electrical parameters of the relevant equipment, control points and control requirements, and other data; the installation of fan coils, air intake (including the supply, return air intake and the inlet of the fresh air, etc.) and the opening of the access door. Pay attention to the protection of finished products of the decorative works; provide equipment suppliers with equipment arrival time, installation requirements and corresponding data in a timely manner.
Ventilation and air-conditioning project construction mainly includes the installation of the ventilation and air-handling equipment, air ducts and other piping system prefabrication and installation, the installation of automatic control system, system commissioning and commissioning of the project. Ventilation and air-conditioning project construction procedures are generally: construction preparation of a duct and components processing of a duct and components of the intermediate acceptance of a duct system installation of a duct system tightness test of air-conditioning equipment and air-conditioning water system installation of a duct system testing and adjustment of an air-conditioning system debugging and acceptance of the completion of an air-conditioning system to determine the overall effectiveness.
Ventilation and air-conditioning construction process
I. Ventilation and air-conditioning construction process
Preparation for the process: (including familiarization with the drawings, team technical briefing, preparation of machinery and materials, etc.) → foundation acceptance, re-measurement, corrections, treatment → equipment unpacking, inventory, inspection, acceptance → cleaning of the equipment → equipment lifting, in place, leveling, correcting → equipment piping production, installation (according to the purification of the) (according to the production and installation process of air duct) → equipment test run → equipment with load running debugging → completion and acceptance.
Production: construction preparation (including machinery, apparatus inspection; team construction technology, safety briefing; familiarize with the construction drawings, etc.) → plate inspection, acceptance → material cleaning, removal of grease → sample, material → production of nibbles (folded square) cleaning nibble grease → production of semi-finished products of the air ducts → removal of surface grease sundries → riveting molding and then clean the internal and external surfaces of the air ducts → checking and acceptance → closed the mouth of the tube → stored in storage To be installed.
Installation: construction preparation → lifting production (including material, straightening, molding, descaling and brushing oil, etc.) → on-site lifting point arrangement → semi-finished products transported to the site assembly room → duct assembly (including cleaning of qualified valve components) → closed port measurement piping (and then according to the production process of production piping) → transported to the site to assemble into a closed system.
Two, ventilation and air conditioning construction process technical measures
1. Remove material oil: in the release of sample material must be removed before the plate surface oil, must be done: a touch, two wipe, three view, to ensure that the complete removal of oil from the surface of the plate. In order to avoid the release of sample material in the sheet surface scratching and grinding out of the scar, damage to the galvanized layer, stained with dust, special provisions shall not be in the cement or soil bad floor material, but should be in the flat cement floor to δ = 3mm cloth rubber sheet material.
2. Make bite: galvanized steel in the cut into pieces of material, handling shall not touch the ground drag, in order to prevent abrasion scars or stained with dust, should use the homemade storage racks or four-wheeled trolleys for transit, the production of bite. Due to the contamination of the nibbling machinery, the nibbling often contains oil debris in the nibbling when making the nibbling. The inner and outer surfaces of the plate sheet and the nibbles must be cleaned again in combination molding. After removing the oil contamination in the nibbles, the sheet material can be combined and molded into semi-finished products of air ducts. After the combination of sheet material molding, must again clean the surface of the air duct semi-finished oil debris.
3. Rivet forming: after the combination of air duct sheet material molding, must be riveted with the duct flange molding, riveting should be in strict accordance with national specifications riveting, and rivets must be galvanized, riveted after the use of adhesive coating or tin welding method to fill the gaps or holes, need to be reinforced duct, reinforcing reinforcement can only be located on the outside surface of the duct, and shall not be used in the fluting method of reinforcement. Prefabricated duct with a completed inspection form to the inspector check, responsible for certifying acceptance before sealing, sealing material selection of high-quality vegetative film, each side of the flange beyond the edge of 100mm or so.