How to judge the quality of the air shower
First, the box
1. The welding of the air shower cabinet should be continuous welding, and all joints should be sealed.
2. The surface of the shower area of ​​the air shower should be smooth and the joints should be sealed.
3. The door of the air shower should adopt reliable sealing measures. The door should be flush with the surface of the air shower.
4. The doors on both sides should have an interlock function. When one side of the door is open, the other side of the door should not be opened. The air is blown.
The lower side doors should be in the locked state, and one door can be opened after the blowing stops. There should be a manual opening function in the event of a power failure or interlock failure.
5. In order to improve the cleaning effect of the blow, the automatic rotating station chassis can be installed.
6. The operation of the switch and button should be flexible and reliable, and the parts should be tightened without looseness and the indication is correct.
7. When in normal working condition, there should be no obvious vibration of the machine.
8, double or multi-person shower room can be connected to a single shower room.
Second, the tuyere
1. The requirements of the air supply port G/T 14.
2. The direction of the air outlet of the ball nozzle should be at least 90o adjustable.
3, the air outlet direction of the slotted nozzle should have 90o adjustable.
4. When a single person is blowing, the blowing airflow can be rotated along the periphery of the body.
5. A nozzle with a small jet diffusion angle and a long jet core section should be used.
6. The air blowing chamber should adopt double-side blowing. When using single-side blowing, the number of nozzles should be no less than 10.
7. The vertical direction of the air supply opening on each side of the single shower room should be no less than two columns.
8. The air outlet should be provided at the top of the shower room.
9. The diameter of the outlet of the selected ball nozzle should not be less than 20mm.
10. The air filter should be equipped with a medium efficiency filter. The wind speed on the windward side of the tuyere should not exceed 2m/s.
Third, the minimum wind speed of the air shower chamber nozzle and the minimum number of nozzles
1. In order to make the airflow contact with the surface of the blown object, the wind speed is not less than 20m/s, and the general nozzle wind speed is (25-30) m/s.
2. The direction of the airflow of the nozzle jet should be as tangential to the surface of the object being blown to form a swirling airflow.
3, high efficiency air filter should meet the requirements of GB 13554, and not less than Class A or according to user requirements.
4. The filter used for return air should be tested according to the method specified in GB14295. The filtration efficiency of particles with particle size greater than or equal to 0.5μm should be greater than or equal to 10% of medium efficiency filter (Medium Effect III).
5. It is advisable to use high-quality, high-efficiency and low-noise fans. When the wind pressure changes by 50%, the air volume changes by no more than 10%, or when corresponding measures are taken to change the wind pressure during operation, the air volume changes by no more than 10%. The fan should be installed in the box to take measures for damping and sound insulation.
6, should have a thermal protection device, and can work stably under the condition of 1.15 times the rated voltage value.
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