As a special public place, there are many kinds of bacteria and germs in the hospital. Therefore, when designing the hospital purification air conditioning system, it should meet the needs of the hospital function, keep the indoor air purification state, remove the dust, germs and various harmful gases in the air, control the spread of germs through the air, so as to ensure that doctors and patients are in a safe and clean environment Visits and work.
Air conditioning division of hospital
In the process of hospital building design, it involves the air conditioning partition of each area in the building, which is the key of electrical design. Because of the different air-conditioning area settings, the air supply and exhaust duct settings and the selected air-conditioning equipment are also different, mainly to keep the parameters of the air-conditioning area constant, to provide a comfortable and healthy environment for the personnel in the air-conditioning area.
Generally, places with long-term personnel stay are listed as air-conditioned areas, such as hospital hall, consulting room and ward, operating room, inspection room, etc. the design and selection of air-conditioning equipment are generally determined according to whether there are people staying for a long time and air purification requirements.
Design and selection of air conditioning mode
The effect of hospital air-conditioning system on environment change is very obvious. We should choose the appropriate air-conditioning purification system to meet the needs of the hospital.
1. Outpatient Hall
There is a large flow of people in the outpatient Hall of the hospital. If the air is not circulating, a large number of germs will gather and cross infection will occur easily. Therefore, the suitable air-conditioning mode of the whole air system is the new air system with heat recovery device. For the fan coil plus new air system, the dry-type terminal device without condensate plus the new air system with low moisture content can be used in summer season.
Design and selection of air conditioning system for hospital purification

For large-scale comprehensive hospitals, considering the cleanliness requirements of each room, we can choose brand-new air system, because the air supply of brand-new air system is all from the outside, there is no repeated infection of germs caused by return air, which greatly reduces the spread of germs. This way can provide appropriate temperature, humidity and cleanliness for each department of the hospital.

2. Consulting room and ward
For the diagnosis room and ward of the hospital, the fan coil plus fresh air system is generally used, and the fan coil using chilled water for cooling has condensation. In the case of long-term humidity of the indoor coil and condensate pan, it is easy to breed bacteria, which has a certain impact on the indoor air quality.
Therefore, in summer, dry coil and fresh air with low moisture content should be used as much as possible to change the indoor air quality, provide a good working environment for indoor doctors, and also provide a comfortable medical environment for patients.
3. Operating room
For the hospital operating room, the overall cleanliness of the operating room should be maintained, and the operating room can be flexibly applied. The clean operating room and the operating room should be equipped with air conditioning purification system separately.
For the grade and grade clean operating rooms, each room should be equipped with an independent air-conditioning purification system, and the grade and grade clean operating rooms can be equipped with an air-conditioning purification system in 2-3 rooms, but each operating room must be equipped with an air exhaust system separately to prevent bacteria mixing and cross infection; the operating room with high cleanliness requirements should be equipped with an independent air-conditioning system.
4. Inspection room
The air conditioner of the laboratory should be set up in different areas and independently to maintain a reasonable air flow direction. Because of the collection of various pathogenic specimens in the laboratory, the air conditioning system of the laboratory can share heat and cold sources, and the terminal unit should be separated from the hospital air conditioning system to prevent and avoid cross infection.
In addition, the air conditioning system should be set up separately in the internal area of the laboratory. For non polluted areas such as office area, in consideration of cost, fan coil system can be used, but auxiliary air purification unit shall be set, and indoor air shall be disinfected and purified regularly.
The test area (including buffer area) shall be equipped with full air system with coarse, medium and high-level filtration, and its air return and air supply outlets shall be arranged inside the laboratory and shall not be connected with the outside, so as to keep the clean area and pollution area separate.
Key points of hospital air conditioning design
1. Energy conservation and environmental protection
Focusing on energy conservation and environmental protection of air conditioning can reduce the operating cost of the hospital on the one hand, and on the other hand contribute to the national energy conservation and sustainable development.
When the hospital designs and installs air conditioning, it can choose combination devices according to different uses of different rooms. For example, the meeting room is crowded with people and has a large amount of fresh air, so it can use exhaust heat recovery device to save energy, and the filter operates with fresh air.
In the practical application of air conditioning, the end variable air volume, operation parameter setting of air conditioning room, full use of outdoor fresh air, large temperature difference air supply, waste heat instead of electric heater heating, reduction of air leakage in air conditioning operation system, enhancement of automatic control ability of air conditioning system can be used to achieve the purpose of energy saving.
2. Pay attention to disease prevention and antibacterial to prevent cross infection
In the design and installation of air conditioning, the importance of antibacterial ventilation should be fully considered, and the possibility of cross infection between air pollution and inpatients should be minimized.
In the design of air conditioning, air flow in different areas should be isolated to provide cascade air supply for ICU ward and infectious disease ward of the hospital. Reasonably control indoor temperature, dust, microorganism, harmful gas and other items. Anti bacteria and disinfection devices shall be set at each vent to prevent the spread of bacterial virus through the vent. The non condensing water unit is selected to prevent the condensation of water drops at the fan coil, breeding bacteria and polluting the vent.
The task of hospital purification air conditioning system is to maintain the required temperature and humidity in the room, and reduce or avoid the spread of disease through the air. Therefore, in the design and installation process, it is necessary to distinguish it from the air conditioning system of general buildings, analyze the specific problems, and control the whole process to achieve air purification, so as to provide a safe and comfortable space environment for users.
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