The intelligent control system monitors and controls various environmental parameters such as cleanliness, air temperature, relative humidity, cross-section wind speed, partition pressure difference, CO2 concentration, fresh air volume, etc. in the operating room through various actuators such as various sensors, PLC and PID field controllers, so as to ensure that the indoor environment meets the needs of the operation and the normal operation of various equipment. The intelligent control system adopts PID control, air volume balance and differential pressure intelligent automatic control, multi parameter real-time collection of environmental state, calculation and control, energy optimization management and energy saving and other technologies, implements centralized monitoring and multi system integration, and realizes the whole process control of the system and resource information sharing of the whole hospital.
Five factors affecting the intelligent control system of clean operating room:
① PID control technology
PID control technology is mainly used to adjust the temperature and humidity in the operating room The control process of PID control is as follows. The control system detects the actual signal of the controlled quantity through various sensors, and compares it with the target required by the operating room to generate deviation. The control system adjusts the PID according to the deviation size, and the adjustment signal acts on each execution device to reduce the deviation, so as to reach the balance and finally meet the system requirements.
② intelligent automatic control of air volume balance and pressure difference
The intelligent automatic control of air volume balance and pressure difference is mainly used to adjust and maintain the air volume in the operating room and the pressure difference in different rooms, accurately control the relationship between the exhaust air volume and the air supply volume in the operating room, avoid cross infection, and ensure the cleanliness of the operating room.
In the clean operation Department of the modern hospital, a variety of ventilation and purification equipment are running at the same time. The system has a large number of air changes, a large amount of air supply, a large amount of fresh air and exhaust air. The air volume and pressure difference must be maintained in the design state between the rooms, which is an important measure to achieve the purification effect and avoid cross infection.
Various air filters installed in the purification system, after a period of use, will increase the resistance of air passing because of dust accumulation. In order to overcome the increase of this resistance, a pressure sensor is installed in the system. When the pressure changes, the frequency converter in the control system automatically adjusts the fan speed, making the air volume return to the normal level, ensuring the number of air changes in the operating room, so as to ensure the cleanliness of the operating room.
In special occasions, such as negative pressure operating room, differential pressure control is very important. This kind of operating room is generally used for infection operation, especially for the operation of respiratory infectious diseases such as SARS and tuberculosis. It is necessary to strictly control the air overflow in the operating room, and ensure that the negative pressure difference between the operating room and the external corridor or airlock room is maintained. In these systems, we use frequency conversion technology, constant air volume technology, air volume balance technology, etc. to precisely control the relationship between the supply air volume and exhaust air volume of the operating room, so that the exhaust air volume of the operating room is larger than the supply air volume, and the operating room maintains negative pressure. In addition, the exhaust air is filtered by an efficient filter, sterilized by an air purification and disinfection device, and discharged out of the room, so as to avoid pollution to the outdoor environment 。

③ real time collection, calculation and control of environmental state parameters

In the intelligent environment control system, it can realize the real-time collection, calculation and control of the operating department environment parameters. Through all kinds of sensors such as temperature and humidity sensor, carbon dioxide concentration sensor, pressure or partition pressure difference sensor and particle counter distributed in the system, all parameters are collected in real time, calculated and transformed, and other parameters required are calculated automatically, which can be directly used in the heat and humidity treatment control of the purification system in the operating room. For example, according to the collected air temperature and relative humidity, calculate the moisture content and enthalpy value of the air according to the built-in calculation model of the wet air in the system. It is used for system analysis and selection of different control modes, which is helpful for the purification system to more effectively control the moisture content of the indoor air, meet the comfortable requirements for the environment, and control the growth of bacteria.
④ energy optimization management and energy saving technology
It is mainly used to reduce system energy consumption. According to the climate conditions in different regions of the country, different purification systems are selected to achieve the best adaptability and reduce energy consumption. In the high temperature and humid area in summer and warm area in winter in the southeast coast, adopting the advanced pretreatment control technology of fresh air can avoid the dehumidification in the circulation unit by the traditional air treatment method, which causes the cold and heat offset phenomenon of cooling and dehumidification first, then reheating and heating up, thus greatly reducing the energy consumption of the system; in addition, in the duty mode, the control system will automatically adjust the fan to a lower speed At the same time, the exhaust fan is closed and the control range of system temperature and humidity is enlarged. These control measures can realize the optimal management of energy and reduce the energy consumption of the system on the premise of ensuring the purification and temperature and humidity requirements of the operating department.
⑤ centralized monitoring and multi system integration
The multi parameter automatic control and monitoring system of the operating room environment control system adopts the hierarchical structure of the upper computer and the lower computer. The central monitoring workstation is responsible for the communication with each field control unit, manages all information of the system, provides the human-computer interface and interface, and monitors all parameters of the whole system through the lower computer to realize the optimal control and management of the whole system. The field control unit is mainly responsible for transmitting all field control and monitoring information to the central monitoring workstation, receiving the instructions from the central monitoring workstation, completing the corresponding operations according to the instructions, and monitoring all parameters of the controlled object.
The operating room environment control system can be networked with other systems of the hospital through high-speed network to achieve multi system integration, such as the Internet with other equipment management system, medical gas detection management system, patient physiological signs information monitoring system, operation management system, PACS / LIS system, medical record management system, so as to realize the sharing of various resources and information, forming a An effective diagnosis, rescue treatment, monitoring system process, to ensure the safety of patients!
As a technical enterprise focusing on the engineering design, R & D, construction and installation of hospital purification operating room, dust-free workshop purification and laboratory purification in Shandong Province, ed purification has always been firmly on the road of professional purification engineering construction and development, and is a truly trustworthy professional purification operating room implementer of domestic enterprises! Want to know more about medical purification industry knowledge Please pay attention to WeChat's public address: Aide-188 (ED purified oxygen supply).