Construction, installation and inspection of negative pressure ward

Construction, installation and inspection of negative pressure ward

The construction quality of the negative pressure ward is related to the safety of the surrounding environment and personnel. The key to ensuring the quality of the project is the control of airtight construction; comprehensively check whether the walls, floor, top and adjacent areas of the building are in good condition before construction. The holes are connected, and all holes are tightly sealed; ...

Text label: negative pressure ward, negative pressure ward construction and installation, negative pressure ward testing

Construction, installation and inspection of negative pressure ward

The construction quality of the negative pressure ward is related to the safety of the surrounding environment and personnel. The key to ensuring the quality of the project is the control of airtight construction; comprehensively check whether the walls, floor, top and adjacent areas of the building are in good condition before construction. The holes are connected, and all holes are tightly sealed; the reserved holes for installation must be carefully blocked with flame retardant materials after the construction is completed to ensure that no holes are left, so as to prevent the air in the negative pressure ward from collusion with the outside world; negative pressure The airflow organization of the ward is different from that of the ordinary ward. The air exerts great pressure on the clean room modular from the outside to the inside. There is also a certain pressure difference between the rooms. During the installation process, pay attention to the safety and reliability of the wall, ceiling and supporting structure. Especially for the ceiling, in addition to considering the weight of the ceiling itself and the pressure caused by the air pressure, it is also necessary to pay attention to the accessibility of people; The gap is sealed inside and outside, and then the sealant can be applied on the surface; the air duct must be processed in a clean indoor environment, and the inner wall should be cleaned immediately after completing a section, and the two ends should be closed with a film; when the air duct is installed, the connection between the air ducts should be Use glue with good fire resistance to seal the surrounding interfaces; after all construction processes are completed, neutral sealant should be used to completely seal the gaps on the ground, exterior windows, walls, ceilings, etc. Access doors, etc. must also be sealed to ensure the formation of negative pressure airflow.

Pressure difference control test of negative pressure ward: the ventilation and air conditioning system should be in normal operation, the room door, transfer window, etc. are all closed, and the test will start after the system parameters are stable; combined with the characteristics of the room layout, the inherent pressure test point should be used , Determine the measurement positions between different areas. The measurement points should be far away from the air supply outlets, return air outlets, door seams, etc. that may affect the local pressure of the measurement points. relative pressure difference. Supply and exhaust fan interlock reliability test: When starting and shutting down the ventilation and air conditioning system, observe the start and stop sequence of the supply and exhaust fans, observe the change of pressure difference in each room of the negative pressure ward, and observe whether there are abnormal conditions such as positive pressure and pressure difference reversal. . The number of air changes is detected under the normal operation of the ventilation and air-conditioning system. When measuring the air volume or wind speed of the air outlet, any accessories on the air outlet should be kept as they are; The area of u200bu200bthe tuyere and the hood should be adapted to the area of u200bu200bthe tuyere, and the edge of the hood and the contact surface should be tight without leakage. When the area of u200bu200bthe air supply port exceeds the area of u200bu200bthe air hood, the air supply port can be divided into several areas, and the air hood is used to measure them and sum them up. . Zhongjing Global Purification can provide consulting, planning, construction, installation, renovation and other supporting services for negative pressure wards and negative pressure isolation wards.

Illumination detection of negative pressure ward: The indoor illumination should be carried out after the room temperature becomes stable, and the fluorescent lamp has been used for more than 100h, and it has been used for more than 15min before the test. The height of the measuring point is 0.8m from the ground, and the points are arranged at a distance of 1m-2m. The measuring point of the room within 30m2 is 0.5m away from the wall, and the room exceeding 30m2, the measuring point is 1m away from the wall. Use an illuminometer to measure the illuminance of the room. Noise detection: The ventilation and air-conditioning system is in normal operation, and it is confirmed that the static pressure difference in the room has reached the requirements; the measurement point is 1m above the ground, and the room with an area of u200bu200bless than 15m2 can only be measured at 1 point in the center of the room, and the room above 15m2 can only be measured at 1 point in the center In addition, 4 points in the opposite corners should be measured again, 1m away from the side wall, and the measurement points should face each corner; use a sound level meter to measure the noise in the room. Temperature and humidity detection: The ventilation and air-conditioning system of the negative pressure ward has been running continuously for at least 8 hours, and all conditions should be stable. Take a point in the middle of the room to be measured, 1m from the ground, and use a test instrument to measure the temperature and humidity. After the reading is stable, determine and Record.

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