Clean sampling vehicle (sampling vehicle) working principle and standard operating procedures for maintenance and cleaning

Establish a standard operation procedure for use, maintenance and cleaning of clean sampling vehicle to standardize the operation process Working principle: the mobile clean sampling car adopts the centrifugal fan system to inhale the air, through the medium efficiency and filter, the laminar flow hood is even pressure output, the clean air is sent to the working area, so that the working area can reach the required purification level, and has the uninterruptible power supply, so as to facilitate the sampling use Structural features: the frame is made of dust-free fire-proof high-precision plate material, and the experimental area is covered with stainless steel, which has good sealing performance, beautiful appearance, firmness and durability Operating procedures and precautions: 1 When using the clean sampling vehicle, turn on the ultraviolet sterilization lamp 50 minutes in advance to deal with the microorganism accumulated on the surface of the clean sampling vehicle in the purification work area; 30 minutes later, turn off the sterilization lamp and start the blower 2 For the newly installed or long-term unused clean sampling vehicle, clean the sampling vehicle and surrounding environment before working, First, use the ultra clean vacuum cleaner or the tool that does not produce fiber to clean carefully, and then use the drug sterilization method or ultraviolet sterilization method to sterilize 3 it is strictly prohibited to store unnecessary articles in the purification work area, In order to keep the clean air flow pattern free from interference 4 Try to avoid disturbing the air flow pattern obviously in the purification work area 5 Measure the average wind speed of the work area with an anemometer regularly (usually once a month) If it is found that it does not meet the technical indicators, adjust the handle of the voltage regulator to change the input voltage of the fan, Make the clean sampling vehicle in working condition 6 the service temperature of the clean sampling vehicle shall be no more than 50 ℃ Repair and maintenance: 1 according to the cleanliness of the environment, remove and clean the filter material in the coarse filter regularly The interval is generally 2-3 months In general, when the non-woven filter material contains more dust particles and the surface turns black, it can be removed for cleaning or replaced 2 Sterilize the environment regularly (usually for one week) 3 Measure the cleanliness of the working area with a dust particle counter every three months, and measure the average colony number of the clean sampling vehicle with a plate method When the technical parameters are not met, the reason must be found, Timely maintenance 4 when the input voltage of the blower has not been able to make the average wind speed of the purification work area reach 0.32m/s-0.48m/s, it means that the dust capacity of the air filter tends to be saturated and has failed, and it must be replaced 5 when replacing the filter, the cover plate on the top of the clean sampling vehicle must be opened When installing the filter, the arrow mark shall be pointed to the air flow direction, (i.e downward) 6 after replacing the filter, It is necessary to check with the dust particle counter whether the seal around the rim is good It is necessary to use silica gel for plugging Then adjust the input voltage of the fan to keep the average wind speed in the purification area within the range of 0.32m/s to 0.48m/s 7 Otherwise, it will affect the sterilization ability 8 for electrical faults, please refer to the electrical schematic diagram and electrical wiring diagram for maintenance 9 for maintenance and inspection once a month, fill in the instrument maintenance record 10 after each use, clean the instrument immediately, hang the corresponding identification, and fill in the instrument operation situation in time.