The air treatment mode of the unit can be carried out in various ways according to requirements, such as using indirect evaporative air conditioners, considering energy saving and increasing heat recovery sections. The air volume of the unit on the sample of the fan coil unit is measured under the static pressure of the outlet and the dry condition. In actual use, it is the wet condition. When the wet condition is lower than the dry condition, the air volume is sometimes reduced by %%. It will decrease by % (refer to the sample specified value), so it will not meet the design requirements. The high, medium and low three windshields should be reasonably matched. According to a certain proportion, at present, the airflow of some products has a small difference. The dripping problem of the unit must be solved, otherwise it will affect the use of the drainage slope, the size of the water tray, and the surface wind speed of the air cooler. Coil fins should be cleaned regularly to reduce air resistance. The motor is reasonably matched to reduce the noise. It has been suggested that a six-pole motor is used when the static pressure at the outlet is zero, and a four-pole motor can be used for the high static pressure. At present, the domestic fan coil industry standard has not adapted to the current domestic product situation, especially in the standard, there is no regulation for high static pressure units, and it is unanimously required to prepare national standards for fan coils as soon as possible or to revise existing standards. Improve the accuracy of the thermal performance check of the surface cooler, and ensure that the error of the heat transfer coefficient formula of the experimental regression does not exceed the higher building. In the winter heating, in order to send the hot air to the air conditioning area, the self-acting temperature should be adopted. Control the diffuser. According to the change of the supply air temperature, the air flow pattern is changed by the self force, and is blown vertically downward when the air supply temperature is reached.

A series of products have been produced in Jiangsu, including throat diameter aa square and circular diffuser. According to the study of the ceiling thermal radiant panel, when the cold water temperature is at the hot water temperature, the test results can reach uniform comfort and the temperature difference does not exceed. The application of clean technology. The discussion focuses on the breeding of pharmaceuticals, hospitals and sterile animals. Following the implementation of the GP transformation in China's pharmaceutical factories, the reconstruction and construction of the hospital is gradually forming a climax. The representative held a heated discussion on the evaluation, selection and positive pressure control of the clean air conditioning system of the hospital clean operation department. The concept of aseptic control in the operating room. In the past, it relied on drug control to achieve the goal of not being infected. Now requires full process control, not just the local target of the patient not being infected. In the past, it relied on drugs, environmental disinfection, and patients taking antibiotics to prevent infection. Now it is required to control the entire surgical procedure, cut off all pollution pathways (including air), and prevent bacteria from contacting surgical wounds. To achieve a sterile environmental protection system, it should be done: through air filtration, effectively remove bacteria and dust from the air. Use airflow to dilute and remove indoor bacteria to achieve a high degree of sterility, especially in critical areas. Pressure gradient control ensures reasonable airflow and pressure distribution between different areas to prevent intrusion of external pollutants. Maintain proper temperature and humidity, reduce the amount of bacteria and indoor bacterial growth. Effectively exhausts exhaust gases and harmful gases.

The surgical department is centered on the operating room and includes a functional area of ​​the self-contained system of the auxiliary room. The clean operation department must use the clean room technology to achieve the purpose of preventing the contamination of bacteria and dust and preventing the external environment from contaminating the surgical room. When designing a clean surgical department, it is necessary to clean and divert the flow, and use decorative materials that are conducive to cleanness. The hydropower design must also meet the cleanliness requirements. To break through the concept of industrial cleansing, industrial cleanliness is divided by air cleanliness, and the clean operating room is divided into four levels: the level is a special clean operating room, the level is a clean operating room, and the level is a general clean operating room. Quasi-clean operating room. All types of clean rooms in the clean surgical department are graded by bacterial concentration, and the air cleanliness level is used as a necessary guarantee. If you use the industrial clean concept to design bio-cleansing, you will waste a lot of money. These are two concepts that cannot be applied. The industrial clean room is full of air outlets, and the clean operating room should have the concept of partial protection and key areas. For example, the operating area refers to the external dimensions of the operating table on the four sides, and the partial air supply mode. The air supply port is directly arranged above the operating table. The fresh air of the air conditioning system of the clean surgery department should be treated separately, with three levels of filtration. The clean operating room is separately installed from the auxiliary room to clean the air conditioning system. Indoor air purification units cannot be installed, and fan coils are not allowed. It is allowed to use sub-high efficiency filters, purifying fan coils, and indoor cabinet type air conditioning units. The electrostatic precipitator should not be used as a purification end purification facility, and an air filter must be provided at the end. Positive pressure control of clean surgical department, commonly used mechanical damper, residual pressure valve, electronic control mode, frequency conversion adjustment, mechanical constant air volume to send air outlet device. Self-control is not recommended. The quality of the residual pressure valve is not good. After long-term use, the closure is not strict. Some valves are outside the corridor, which is a polluted area and should not be promoted. It is recommended to use a constant air volume valve. When the two-position constant air volume valve is working, the air is sent at a high air level, and when it is not working, it returns to the low air level. Each clean operating unit uses a separate air conditioning system, and a unified positive pressure air supply (new air) system, which is the most desirable system form, with the largest comprehensive evaluation index.

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