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                Key points of electrical design in hospital building

                Publishers:Admin   Published:2017-07-18
                       The reliability of the electrical design of the hospital building is related to the quality of the medical work. Due to the large number of departments in the hospital building, the large number of medical procedures and the high security features, the importance of the design has also been highly valued by the designers. With the development of China's economy, the size of the hospital, layout, equipment, etc. have undergone tremendous changes, the hospital wards increasingly hotel, the surgical area increasingly international, clinics increasingly spacious, increasingly modern medical equipment. The new changes in the hospital make its electrical design must follow some of the relevant points to ensure the stability of the role of the hospital play.
                1 load side
                       Hospital medical sites are generally divided into three categories: the first category is not the use of medical electrical equipment, contact parts, that is, 0 medical places; the second category for the first class of medical facilities, the use of electrical equipment components need to contact with patients with medical Site; third category of electrical equipment for contact parts need to contact with patients, and power interruption will endanger the lives of patients with medical places. Therefore, the hospital's load level is in accordance with the medical site and the safety of human safety and the degree of contact with the human body, and its automatic recovery of power supply time must also be in accordance with the "civil building electrical design specifications" in strict requirements. For example, in a hospital, the outpatient service for a class of medical places, automatic recovery of power requirements of the lower, more than 15s is a normal range; but for the baby room, it is the same as a medical place, automatic recovery power supply time must Within 15s, otherwise it may cause medical malpractice; operating room for the two types of medical places, the higher requirements of the power supply, once the power, must be restored within 0.5s. In general, automatic recovery of power supply time ≥ 0.5ss should be in accordance with the primary load power supply; automatic recovery of power supply time between 0.5 to 15s medical places should be in accordance with the secondary load power supply; in addition to the three-stage load power supply.
                2 power supply system
                       The power supply system is determined according to the load nature of the hospital. According to the relevant provisions that the hospital building for the high-rise buildings, including emergency department, baby room, blood bank, etc., for a load object, that is, these hospitals must have two power supply, when a load is small, Second low voltage power supply. According to the "civil building electrical design code" in the provisions of the hospital's power supply system can be divided into four levels: premium and third-class hospital with 10kV cable two-line special power supply, hospital-owned diesel generators, important equipment using UPS Power supply; three first-class hospital with 10kV cable two-lane special power supply, an important set of UPS power supply; second class hospital with 10kV two-lane or single-line power supply, important equipment using UPS power supply: a hospital with single 10kV power supply, Important equipment is powered by UPS.
                3 low voltage distribution
                       The hospital's low-voltage distribution system is generally used radioactive or tree-type power supply. Some particularly important equipment in addition to dual power supply, but also should be equipped with diesel generators. For different hospitals, their electrical equipment also have their own characteristics, should be based on different electrical equipment, to take the appropriate electrical design.
                3.1 operating room
                       Taking into account the special characteristics of the operating room, the power supply in addition to two-line power supply, but also need to match the generating units. The operating room of the electricity supply should be supplied by the variable distribution line and can be freely switched in the power distribution room in the operating room. Each operating room power lines must be laid separately, to do short circuit, overcurrent, overvoltage protection measures. In the clean operating room, should be equipped with a dedicated distribution cabinet, which must be set up in the clean area, the total load should not be less than 8kVA.
                3.2 emergency room
                       Emergency operation room power supply requirements should be in accordance with the different requirements of its equipment to design the appropriate power supply equipment. Such as emergency operating room, laboratory, observation room, etc. should be in accordance with the requirements of different equipment design power supply system.
                3.3 Laboratory Section
                       Medical equipment in the laboratory has a high demand for voltage stability, so the power supply should be from a socket with a regulator.
                3.4 Department of Radiology
                       Radiology mainly include ETC room, CT room, X-ray room, the three power supply should be set up a separate power distribution circuit. Each section should be equipped with their own regulator, to ensure the capacity of the equipment, but also should set the corresponding distribution box. Lighting, work lights, etc. should have a corresponding chain function.
                4 lighting aspects
                       Lighting system is an important indicator of the development of modern hospitals, which should be designed according to the requirements of medical staff and patients, the appropriate lighting environment can improve the quality of health care workers, improve patient recovery efficiency. But it can not be too luxurious, otherwise it will improve the cost of the hospital, but also to the patient to bring the invisible cost. So according to different places to design a reasonable lighting system, combined with natural light, to patients and health care workers to create a good lighting environment. According to the "architectural lighting design standards" of the relevant requirements, different medical places have different lighting standards, such as the operating room, every 0.75m horizontal height of the standard lighting value of 750lx; ward lighting standards for 100lx. In addition, but also consider the use of medical equipment requirements, such as nuclear magnetic resonance into the scanning room needs to use electromagnetic shielding, the lighting to use DC, the illumination can not be arbitrarily increased; ophthalmic darkroom should use adjustable brightness incandescent; X-ray diagnosis Room should be installed on the door red warning lights to remind other staff The department is working, should also design linkage device, when the staff strayed, take emergency measures to prevent the cause of personal injury to the patient. Surgery, in addition to the design of the shadowless lamp, but also have the general lighting. Both need to use different circuit power supply. Surgery for shadowless lamp brightness should be 20,000 to 10 million lx; oral surgery shadowless lamp for 10,000 lx. In the ward, a separate ward can be used to adjust the energy-saving lamps; in the public ward, should adopt a one-meter design, and can adjust the light source, to avoid affecting other beds, for the pediatric ward equivalent degree should be 1.0lx. In the need to set the site of ultraviolet disinfection, such as respiratory department, surgery, etc., should ensure that the UV lamp does not illuminate the patient, the power density should be 1.5W / ㎡ ~ 3W / ㎡, in the high bactericidal requirements should improve brightness. In the design of emergency lighting, should be in the public channel, public hall, staircase, fire elevator and other facilities to set the evacuation lights, and set the lights in the safety exit. As the hospital's high mobility, in order to prevent panic in emergencies, should improve the design standards. At the same time in the operating room, severe observation room set up safety lighting.
                5 cable selection
                       As the main staff of the hospital when the patient, its ability to exercise has been a certain limit, so beware of the fire. Therefore, in the choice of margin of the line, the cable to use low smoke zero halogen flame retardant wire or cable to wear steel pipe. For some special departments, where the fire still needs to work should be, such as the operating room, should use mineral insulated cables.
                6 Summary
                       With the development of the hospital, its function has gradually increased, the requirements of patients is also getting higher and higher, so its electrical design standards also will increase. Scientific electrical design can not only improve the efficiency of the hospital, less medical malpractice, but also to provide patients with a comfortable treatment experience, thereby enhancing the visibility of the hospital.
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