Here mainly share the air volume debugging and differential pressure debugging: 1 Air volume commissioning 1, meaning and premise Good air volume adjustment can meet room parameter requirements and save energy. Completed completion (enclosure structure, air conditioning system, automatic control, etc.), single machine test operation is normal (combined air conditioning unit, chiller, etc.). 2, based on Design Drawing, Code for Construction Quality Acceptance of Ventilation and Air Conditioning Engineering (GB50243-2002) 3, preparation Detailed air volume balance table for each room, design drawings with the position of the tuyere damper, walkie-talkie, calibrated air volume test equipment, and air flow test holes for the main main pipe of the system. 4, debugging method Air volume equal distribution method: determine the most unfavorable pipeline of the system, and start to adjust from the branch. Measure the air volume of the most unfavorable branch pipe and the adjacent branch pipe separately, and adjust with the regulating valve so that the measured air volume ratio of the two branch pipes is approximately equal to the design air volume ratio (not the design air volume), and the air volume ratio of each branch pipe is also adjusted to achieve the design. Claim. Finally, the total air volume of the main trunk of the fan outlet is adjusted to the design air volume, and the air volume of each of the other trunk pipes and branch pipes is proportionally distributed according to the ratio of the respective design air volume, according to the design value. 5, several problems of insufficient air volume · Design problems, unreasonable piping, small fan, etc., can be partially modified or replaced · · Room increases air supply · · Valve problem · · Whether the pipeline or the unit is leaking · · Is the layout of the equipment room reasonable? · 2 Differential pressure debugging 1, the premise After the air volume is commissioned, it is slightly larger than the design air volume. There are adjustment means and room for returning the air duct. Sufficient differential pressure gauge setting. The coarse adjustment of the return air and the fresh air meet the design requirements. 2, preparation Familiar with the system, the walkie-talkie, the drawings indicating the absolute pressure difference and the relative pressure difference of each room, familiar with the position of the air return valve sent back to the air duct. 3, method Simple system, coarse adjustment of fresh air volume, determine the overall pressure difference, and then fine adjustment from the outside to the inside. For complex systems, the baseline differential pressure is first determined. 4, pay attention to the problem · There is at least one adjustment method for the pressure difference between adjacent rooms, starting from the adjustment of the return air · · Pay attention to the door seam. · · By setting the filter cloth in the air return port, the amount of return air can be reduced, and it is less likely to generate noise than the small valve. · · Pay attention to the influence of the pressure difference of the adjacent room on the pressure difference of the room. · · When testing, first make sure all doors are closed. Distinguish the positive and negative pressure of the room, first measure the flow direction, and then measure the size. Note that the differential pressure gauge is set correctly. · Next talk about detection 1 Importance of detection The inspection is very important for the whole process. The relevant data shows that the proportion of engineering commissioning inspection and maintenance can account for 1/3 of the entire clean room construction. 2 Laboratory engineering test specification The following specifications can be referred to in the test: · Science Laboratory Building Design Specification JGJ91-93 · · Disease Prevention and Control Center Building Technical Specifications GB50881-2013 · · "Technical Specifications for Laboratory Animal Facilities Construction" GB50447-2008 · · "Biosafety Laboratory Building Technical Specifications" GB50346-2011 · · Cleanroom Construction and Acceptance Specifications GB50591-2010 · · "Clean Factory Design Code" GB50073-2013 · · Pharmaceutical production quality management practices (human medicine GMP) · 3 Laboratory engineering testing project So what are the specific items that need to be tested? The main parameters are as follows key parameter Air volume and wind speed: the most important means of achieving laboratory parameters; Static pressure difference: an important prerequisite for ensuring cleanliness; Cleanliness: The most important parameters, measured in 0.5 micron and 5.0 micron, originally defined in English, cubic feet (28.3 liters) Bacteria: associated with cleanliness Note: The static pressure difference is suitable for functional rooms with differential pressure requirements. Cleanliness and bacterial concentration are suitable for clean rooms (eg microbiology laboratory, animal room, etc.) Other parameters Noise: personnel comfort; Illumination: personnel comfort, to ensure the working environment; Temperature and humidity: personnel comfort, product quality, inhibition of bacteria Fresh air volume: personnel comfort, supplemental exhaust, positive pressure Note: These parameters are clean items (such as microbiology laboratory, animal room, etc.), and physical and chemical laboratories can refer to the implementation according to the requirements. 4 Testing instruments and methods What are the testing instruments and methods for various parameters? This is the highlight of this article, and listen to Xiaojie's sister. Cleanliness test The detection of cleanliness generally uses a dust particle counter, mainly considering the following factors: · Counters are available in domestic, imported, desktop, handheld and other categories. · · Large flow rate of 28.3 l / min, 50 l / min · · Ordinary small flow rate of 2.83 liters / minute · · Different number of channels · · Can test the minimum particle size of 0.1μm, 0.3μm, 0.5μm · · Prices range from 5,000 yuan to 200,000 yuan · The imported dust particle counter is definitely excellent, but it also needs to be considered comprehensively. · High price · · High maintenance costs · · Instrument refinement · · Lightweight · Differential pressure detection A common instrument for detecting differential pressure is a pressure gauge/micromanometer, which can be divided into: · Liquid column · · Pointer · · Digital · · sensor · Differential pressure detection method 1, indoor pre-measured differential pressure detection hole 2. It is recommended to set up a liquid column type differential pressure gauge indoors to monitor the differential pressure at any time, and because it is very reliable, the differential pressure sensing device can be calibrated. 3, the door seam detection or reserve differential pressure detection hole Air volume wind speed detection Various wind speed air volume measuring devices · Bi-managed: accurate and simple principle, combined with differential pressure gauge, professional · · Impeller type: Because the bearing resistance of the impeller has a direct influence on the air volume test, it is easy to deviate, and the impeller probe is large, which cannot be measured inside the air duct. · · Hot ball type: reliable, durable, easy to use, exquisite design of foreign products, domestic products are rough, but the accuracy is comparable · · Air volume cover: For the air outlet air volume test is very fast and convenient, the principle is reliable, but the price is expensive, the installation is more complicated, and the wind speed test cannot be performed. · Multifunctional precision anemometer Accurate measurement of wind speed, temperature and humidity, differential pressure 1, wind speed (thermal sensor): (allmodels) Range: 0—50m/s Accuracy: ±3% of reading (minimum ±0.15m/s) Resolution: 0.0lm/s 2, temperature range: accuracy ± 0.3 ° C Resolution 0.1 ° C 3, relative humidity: accuracy ± 3% RH Resolution 0.1% RH Tips 1. The average user only needs to have a hot ball anemometer. 2. For the air volume cover, the construction party configures according to needs 3. In the actual project, it is found that the method of using the anemometer plus the auxiliary air measuring cylinder and the air volume value measured by the air volume cover method have large deviations. Temperature and humidity detection Two instructions: Generally, the pointer type thermometer and hygrometer has a large deviation in detection of humidity. The temperature and humidity of the control panel need to be corrected, and the probe position is different. Precautions: · China's summer indoor temperature setting is generally higher than foreign countries · · Protective clothing and masks prevent the surface heat of the human body from being lost, resulting in excessive surface and face temperature. · · Excessive temperature and humidity make the body digest, urinary, nervous system function changes · · At 35 ° C, physical strength decreased by 70%, reaction rate, sensitivity decreased by 30% · · Heatstroke is easy when the temperature is high and the relative humidity is greater than 70% · · When the relative humidity of the air is less than 10%~15%, the human skin and mucous membranes are dry, susceptible to skin diseases, and the nosebleeds are easily felt. · · Take care to avoid human interference · Noise detection Sense of detection Long-term exposure to noise makes people irritated, panic, insomnia, even tinnitus, hearing loss, causing nerves, digestion, endocrine diseases, endangering physical and mental health Testing standard China's norms stipulate that the general noise of the clean room is lower than 60dB (A), and the hundredth is lower than 65dB (A) Testing equipment Noise detection generally uses a noise meter (sound level meter) Illumination detection Sense of detection Too strong and too weak lighting will increase the fatigue of the eyes, damage to people's vision Appropriate illumination helps protect vision and health, and helps improve the accuracy of your work. Testing equipment Illuminance test generally uses illuminance meter Microbial Detection Testing device Six-stage sieve percussive air microbial sampler Detection principle The anatomical structure and aerodynamic physiology of the human respiratory tract are simulated to determine the amount of airborne microorganisms. Ok, today's dry goods are introduced here, is it very enjoyable? Nantong Zhuoluo International Trading Co., Ltd , https://www.zlhomedecor.com