The control points before HVAC construction are mainly reflected in three aspects. One is to strictly review the design drawings to eliminate hidden dangers from the source. Before entering the construction site, the project construction unit must organize experts in HVAC to review the engineering drawings. If problems are found, they need to be sent back to the project design unit for careful revision, knowing that the design drawings can meet the quality requirements of HVAC engineering. Secondly, it is necessary to coordinate the cooperation of various construction processes, because HVAC engineering is not an independent project and needs to be cross-related with different processes or types of work such as civil engineering, hydropower and pipeline construction. Therefore, before the construction, it is necessary to make unified arrangements and plans for other processes related to HVAC engineering construction through design drawings to ensure the smooth implementation of HVAC engineering. Third, we should strengthen the acceptance of building materials. At present, there are many problems in the quality of HVAC engineering, and the hidden dangers of building materials can not be ignored. This involves the improvement of the procurement system. Purchasing personnel need to be responsible for the purchased building materials and construction equipment, and set up a material quality appraisal department to appraise the quality of the purchased materials. If problems are found, communicate with the purchasing department in time and change the materials. At the same time, the procurement needs to audit the suppliers, and solve the problems in time if they are found. If they cannot be solved, the supplier's qualification will be cancelled.
The quality control in the process of HVAC construction is mainly reflected in four aspects. One is the installation and manufacture of the bracket, which is the foundation of HVAC engineering construction and its function is to provide support for the heating pipeline. In the construction stage, standard suspenders and section steel should be strictly selected to ensure that the support can bear the maximum load of ventilation pipes and heating equipment, and these supports should be treated with anti-corrosion treatment to enhance the anti-corrosion ability of the support and ensure that the installation position is accurate and in line with technical specifications.
The second is the quality control of equipment and pipeline installation. The control of equipment installation is relatively simple, as long as the safety and quality of the equipment are guaranteed. However, the quality control of pipeline installation is relatively complicated, because pipeline installation will involve civil engineering and hydropower engineering, involving a wide range. Before installation, it is necessary to conduct technical analysis with relevant construction personnel to ensure that the pipeline is straight and reduce tee joints and reverse bends. Pay attention to the pressure control and sealing control of pipeline connecting lines to prevent air leakage and water leakage.
The quality control of the installation of the third tuyere is closely related to the building decoration, and the layout of the tuyere should be reasonable and coordinated with the decoration environment. Therefore, the tuyere should be carefully examined and approved before opening construction, and the deformation of tuyere due to insufficient rigidity should be avoided during installation, which will easily make the tuyere generate noise and reduce its service life.
Fourthly, the blocking control of reserved holes is easy to be ignored, especially some construction units, considering the cost, often deliberately do not block the reserved holes, which is very easy to cause the invasion of buildings and the humidity of the space, causing great damage to the living space.
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