The reason and solution of the influence of clean room air conditioning on comfort in hospital
At present, many hospitals in the construction of clean operating room, ICU and other clean hands after the use of the room, there are some problems, such as chest tightness, heavy smell, noise and other problems, no conventional air conditioning feel comfortable.
For these problems, several reasons are found in the later investigation:
1. The area of new air outlet is too small. In some hospitals, the size of the fresh air and rain proof louver is the same as that of the fresh air duct. As a result, the fresh air will soon be blocked, the supply of fresh air will be insufficient, and the wind speed of the fresh air outlet will be too high and the noise will be very large.
2. The exhaust air volume is too small and the exhaust mode is single.
3. The arrangement of air supply and return is uneven and the air flow is unbalanced.
4. Too much noise.
Solution:
1. The design of fresh air volume must be enough. It is necessary to consider the exhaust air volume to eliminate indoor odor and heat. It is better to design a frequency conversion fresh air volume regulation mode, which is proportional to the exhaust air volume. The design of new tuyere should be scientific, considering the effective area of shutter tuyere and the dust capacity of filter screen.
2. Combined with the indoor use function, especially in the area where the ICU staff are concentrated, it is necessary to consider the heat and peculiar smell exhaust air volume produced by the medical staff in high-intensity working condition, when the staff eat and when the patient is clean and sanitary. The best design is an intelligent variable frequency air volume control system.
3. In the design of air supply and return system, the first is to consider the reasonable control of wind speed; the second is to ensure that the layout of air return outlet in the room must be balanced and even, and each air supply outlet and return outlet branch must be installed with valves.
4. The causes of excessive noise are mainly caused by unreasonable design, unscientific selection and improper construction. The main points are as follows:
(1) The air pressure for equipment selection shall be reasonable, neither too large nor too small.
(2) The fan is a backward curved low-noise centrifugal fan.
(3) The double cavity microporous plate muffler shall be installed on the air supply and return main pipe, and the straight silencing section and silencing elbow must be installed.
(4) Air conditioning equipment shall be kept away from the use area as far as possible.
(5) Noise shall be considered in the selection and design of air duct, and the flow velocity shall not be too large.
(6) At the intersection of the air supply and return main pipes, a silencing static pressure box shall be made, and the net height of the static pressure box shall not be less than 600 mm.
(7) The wind speed of the effective area of the air outlet must be considered in the selection design of the return air outlet, and the size should be larger as far as possible.
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