clean surgery department (room) should be led by the construction party (hospital). The acceptance system should implement the provisions of the current national standard " clean room construction and acceptance specification " GB50591.
Cleaning surgical department acceptance is generally led by the construction party and divided into project acceptance and use acceptance. Project acceptance is divided into intermediate acceptance stage (self-inspection), construction acceptance stage (design compliance confirmation, installation confirmation, operation confirmation), and performance acceptance stage (performance confirmation through comprehensive performance assessment). Among them, the final stage of project acceptance (comprehensive performance assessment) should be entrusted to an independent third party for testing, which has ensured the fairness and objectivity of the acceptance results. Regardless of whether the construction party has a complete commissioning report, it cannot replace the comprehensive performance assessment.
must-test items for engineering inspection, including 14 items, among which the wind speed, air volume and static pressure difference should be measured first, and the bacterial concentration should be tested last.
Clean surgical department must test items
2. ⅡｍⅣ The number of ventilation times of the clean operating room and the clean auxiliary room and the air outlets of the level II and III operating room are not under the air outlets of the level II and III operating room. Speed blind spot
3. Fresh air volume
4. The last-level filter leaks
5. The tightness of the operating room
6. Static pressure difference
7. The level I clean room opens the door inside 0. 6m Air cleanliness
8. Air cleanliness level
9. Temperature and humidity 9
National standard "Cleaning Room Construction and Acceptance Specifications" GB50591 targets the universality requirements of clean rooms, and " Hospital Clean Surgery Department Building Technical Specifications " GB50333-2013 stipulates the unique needs of clean surgery departments (rooms). Therefore, the inspection and acceptance of clean surgery departments (rooms) should be based on the "Specifications".
2. Compared with the 2002 version of the "Specification", the added items include:
(1) The operating area of the level I clean operating room and the level I clean auxiliary room are 1.2m above the ground in the local level 5 area. 1. The speed unevenness of the working face;
(2) The cleanliness at 0.6m inside the door of the I-level clean room;
(3) There is no speed blind spot under the air outlet of the Ⅱ and Ⅲ-level operating rooms;
(4) The air tightness of the operating room;
(5) The concentration of formaldehyde, benzene and total volatile organic compounds (TVOC);
(6) Harmonic distortion rate (voltage, current).
Among them, the first two items are the test items specified in the 2002 version of the "Specification", but are not required items. After this revision, the "Specification" will adjust it to a required item. The last four items are newly added in this revision. The new items are mainly based on the following considerations:
Airtightness: The test results of domestic clean surgical department (room) in recent years have shown that most surgical departments (rooms) have poor airtightness. The result is that in order to ensure that the static pressure difference between the surgical department (room) and the adjacent rooms (area) can meet the standard requirements, it is necessary to significantly increase the fresh air volume of the unit. The final result is that a considerable number of operating rooms have a fresh air volume of more than 30% of the total air supply of the system, or even close to 50%, which far exceeds the design requirements. This not only has a significant negative impact on the energy-saving operation of the clean surgical department (room), but also may very likely lead to the unit being unable to meet the huge new air, heat and humidity treatment needs in extreme weather. Therefore, this revision adds the content of using smoke to conduct visual inspection of airtightness in the operating room.
Formaldehyde, benzene and total volatile organic compounds (TVOC) concentration: During the construction of the clean surgical department (room), the use of various sealants, adhesives and various non-metallic materials is much greater than that of ordinary functional rooms in the hospital. Therefore, to ensure the health of long-term staff in the clean surgical department (room), the content of this test is considered to be added.
Blower speed and number of ventilation
"Guidelines for the Implementation of Technical Specifications of Buildings of Hospital Clean Surgery Departments" GB50333-2013 clearly stipulates that the inspection of the air supply speed and number of ventilation ventilators in Class II~IV operating rooms should comply with the following requirements:
01, For Class II and III clean operating rooms, the average air speed of the air supply surface should be measured, the height of the measurement point is within 0.1m below the air supply surface, and the distance between the measurement points should not exceed 0.3m. The outermost measuring point of the air supply surface speed measurement point should be 0.05m within the boundary of air supply port , and the points should be evenly distributed. The wind speed range of each point at the air supply surface shall comply with the requirements of Article 8.2.3, Paragraph 7 of this Code.
"Technical Code for Buildings of Hospital Clean Surgery Departments" GB50333-2013 stipulates:
2. shadowless light The air supply blind spot where the column and bottom cover occupy the air supply surface should not be greater than 0.25m×0.25m.
3. The air supply device should be conveniently replaced or the final filter can be replaced outside the operating room; a finished device with leakage blocking function can be used, and the filter box should be installed in the nearby equipment layer.
4. The omission detection provisions in Article 13.3.8 of this specification shall be implemented.
5. The air supply clean airflow ratio of the centralized air supply device should be greater than 0.9, and should be calculated by the following formula:
6 .When the cross-section 1.2m above the ground of the operating area of the Class I operating room is arranged according to the requirements of Article 13.3.6, paragraph 3 of this specification, the wind speed unevenness β should be less than or equal to 0.24, and β should be calculated according to the following formula:
where: vi—the speed of each measurement point (m/s);
—the average speed of each measurement point (m/s);
k—the number of measurement points.
7. The air supply speed on the cross section 0.1m below the air supply surface of the centralized air supply device in Class II and III operating rooms should be evenly distributed, and should be between 0.1m/s and 0.4m/s, and no blind spots without speed should occur.
02. After the above-mentioned wind speed conditions are met, the number of ventilation times should be calculated according to the following formula. The number of ventilation times should not be less than the provisions of Table 4.0.1 of this specification, and should not exceed 15% of the design value.
Number of ventilation times = Room air supply volume (m³/h)/room volume (cubic meters) = Average air supply surface speed (meters/second) * Air supply surface area (square meter)/room volume (cubic meters)
03. The dispersed air supply vents of Class IV clean operating rooms and clean auxiliary rooms should be calculated by measuring the air volume of the air supply vents. The test results should not be less than the provisions of Table 4.0.1 of this specification, and should not exceed 15% of the design value. The detection method for dispersed air supply vents should comply with the relevant provisions of the current national standard "Cleaning Room Construction and Acceptance Specifications" GB 5059.
[Technical Points]
1. Purpose
in the past did not require the uniformity of air speed of centralized air supply in Class II and III operating rooms, and even did not pay attention to the layout of air vent filters during design and construction. This time, the "Specification" has requirements.
2.Measures
(1) For the clean operating room of Level II and III, the wind speed under the air supply ceiling measured by the measured air supply ceiling is then calculated based on the average wind speed value. The wind speed test requirements and the requirements of the wind speed measuring instrument should refer to the corresponding content of determining the cross-sectional wind speed of the I operating room.
(2) The measurement of the air supply volume of the dispersed air outlets of the Class IV clean operating room and the clean auxiliary room is generally tested using air volume hood . The air volume hood used for air vent air volume test should have a resolution of at least 1m³/h and the accuracy should be at least ±3% of the reading.
(3) When using air volume hood for air volume measurement, all openings of the air hood diffusion plate should be covered. For air hoods with a size significantly smaller than the air volume hood, try to cover them in the center of the air volume hood during measurement.
(4) When using an anemometer to measure the air volume, the air volume of the air should be prepared in accordance with the requirements of the current national standard "Cleaning Room Construction and Acceptance Specifications" GB50591, and the air volume should not be measured directly under the diffusion plate. The air volume of the air volume should not be calculated by using an anemometer to measure it directly under the diffusion plate, and the air speed at the center point of diffusion plate should not be measured only.
Figure 2 Air volume meter
Figure 2 shows a type of air volume meter. Model/product name FL-1/air volume meter’s performance parameter size (W×D×H) (mm)
570×570
830×830
Weight 4kg, Parameter description: Bitouman Principle, air volume: 150~3500m³/h, can be raised by 3m.
PS: This team undertakes various clean laboratory process design and professional system design;
undertakes various clean laboratory professional cleaning services;
undertakes various thousand-100,000-100,000 and A/B/C/D grade clean laboratory construction, air volume and pressure differential debugging of air conditioning systems in clean workshops;
and clean air conditioning units trial operation and debugging and technical support;
also provides comprehensive and overall solutions for technical difficulties and doubts in clean laboratory.
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