Negative pressure weighing cover convenient to change primary filter
A primary-effect filter that is easy to replace, applied in the field of weighing hoods, can solve problems such as difficult operation and heavy workload, and achieve good filtering effect
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[0024] Example, see as Figure 1 to Figure 5 As shown, a negative pressure weighing hood for easy replacement of primary filters includes a chassis 1, and the chassis 1 is provided with a working area 101, a fan area 102, a return air area 103, and an air outlet area 104. The fan The area 102 is located on the left side of the work area 101 and is arranged at intervals. The return air area 103 and the air outlet area 104 are respectively located below and above the work area 101. The work area 101 is provided with a workbench 21 on the workbench 21. A through hole extending in the vertical direction is provided, a return air window is provided on one side wall of the return air area 103, and a primary effect filter 3 and a medium effect filter 4 are provided in the return air area 103. The primary effect filter 3 is located between the workbench 21 and the medium-efficiency filter 4, the bottom of the fan area 102 is provided with a fan 22, and the air outlet of the fan 22 is c...
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