A fume hood with adjustable air volume

Abstract

The utility model discloses a kind of ventilation cabinet of adjustable air volume, it is related to ventilation cabinet technical field.The utility model includes: control cabinet and the ventilation frame being set at its top, ventilation frame is hollow frame body structure;Air collector cover, it is set inside ventilation frame, for the air intake when ventilation;Dust detector, for real-time detection dust concentration in the air drawn and output electric signal;Multi-stage speed regulation fan, it is set in the small caliber end position of air collector cover, and dust detector is electrically connected, its power is divided into three stops adjustment according to dust concentration.The utility model realizes the accurate matching of air volume-concentration-filtering area by the closed-loop control system of dust detector and control cabinet, compared with traditional fixed air volume mode, system can automatically switch the low, medium, high three gears power of multi-stage speed regulation fan according to real-time dust concentration, more energy-saving under low concentration working condition, dust removal effect can also be guaranteed under high concentration working condition.

Claims

1. A fume hood with adjustable airflow, characterized in that, include: The control cabinet (1) and the ventilation frame (2) disposed on its top, the ventilation frame (2) having a hollow frame structure; An air intake hood (3) is installed inside the ventilation frame (2) for air intake during ventilation; Dust detector (5) is used to detect the dust concentration in the drawn-in air in real time and output an electrical signal; A multi-stage speed-regulating fan (4) is installed at the small-diameter end of the air collection hood (3) and is electrically connected to the dust detector (5). Its power is adjusted in three levels according to the dust concentration. The dust handling component (6) includes three filter units arranged in parallel, each with the same structure and independently controlled.

2. The adjustable airflow fume hood according to claim 1, characterized in that, A protective plate (201) is movably provided on one side of the ventilation frame (2) to protect the internal structure of the ventilation frame (2).

3. The adjustable airflow fume hood according to claim 1, characterized in that, The individual filter unit of the dust treatment component (6) includes: The processing box (604) has its high end collected into the gas collection plate (605), and the gas collection plate (605) is connected to the connecting pipe (606). The gas distribution pipe (602) is controlled to open and close by the first solenoid valve (603), and is located at the lower end of the processing box (604), with the other end converging into the gas distribution plate (601). A filter screen (607) is detachably installed inside the processing box (604), and a vibration motor (608) is provided on its surface. The ash discharge pipe (609) is vertically connected to the bottom of the processing box (604), and its opening and closing are controlled by the second solenoid valve (610). The ash is collected into the collection box (611) at the bottom.

4. The adjustable airflow fume hood according to claim 1, characterized in that, The air collecting hood (3) has an inverted cone shape, with its large diameter end facing the air inlet direction and its inner wall coated with an anti-corrosion and wear-resistant coating.

5. A fume hood with adjustable airflow according to claim 3, characterized in that, The top end of the connecting pipe (606) is connected to an exhaust pipe (7) leading to the outdoors.

6. A fume hood with adjustable airflow according to claim 3, characterized in that, One end of the collection box (611) is open, and a sealing door panel (8) is hinged to the ventilation frame (2) at the position corresponding to the opening.

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