Negative pressure device

Abstract

The invention discloses a negative pressure device which comprises an oil stain recovery device, a controller, a mode adjustment button, a connecting wire, a rear plate, a work room, a grip, a front plate and a fan protection cover. The fan protection cover is fixed at a center of a surface of the front plate via a screw; the oil stain recovery device is provided with a rope pulling device, a trigger starting device, a fixed balancing device, an upper and lower adjusting device, a transmission device, a moving device, an oil scraping collection device, and an outer casing body; the beneficialeffects of the negative pressure device are that in airflow transportation processes, oil stain volatiles in an airflow and water vapor fall inside a sealing rubber ring because of centrifugal effects, and the oil stain volatiles and the water vapor finally converge into a collecting bottle through a guiding tube from a diversion port on a bottom part of a sealing rubber ring. The oil stain and the water vapor in the negative pressure device can be collected, negative effects exerted on normal work of a negative pressure blower fan by the oil stain and the water vapor in the negative pressuredevice can be greatly reduced, maintenance of the negative pressure blower fan can be facilitated, and service life can be prolonged.

Description

technical field [0001] The invention is a negative pressure device, which belongs to the field of negative pressure devices. Background technique [0002] The negative pressure fan uses the cooling principle of air convection and negative pressure ventilation. It is a kind of natural suction of fresh air from the opposite door or window at the installation site, and the indoor stuffy air is quickly forced out of the room. Any poor ventilation problems can be improved. Machine, a negative pressure device commonly used in the current technology is a negative pressure fan. Because the air in the workshop is relatively dirty, the air contains more water vapor and oily volatiles, and the negative pressure fan is used for exhaust ventilation. During the process, more oil will be attached to the rotating blades of the negative pressure fan, and the oil will splash around under the centrifugal force of the blades. The lack of oil collection function will affect the service life of t...

AI Technical Summary

Problems solved by technology

[0002] The negative pressure fan uses the cooling principle of air convection and negative pressure ventilation. It is a kind of natural suction of fresh air from the opposite door or window at the installation site, and the indoor stuffy air is quickly forced out of the room. Any poor ventilation problems can be improved. Machine, a negative pressure device commonly used in the current technology is a negative pressure fan. Because the air in the workshop is relatively dirty, the air contains more water vapor and oily volatiles, and the negative pressure fan is used for exhaust ventilation. During the process, more oil will be attached to the rotating blades of the negative pressure fan, and the oil will splash around under the centrifugal force of the blades. The lack of oil collection function will affect the service life of the fan. The long-term transmission of the fan or the instability of the airflow A sudden change will cause the belt to loosen, affecting the transmission effect of the belt and causing the rotation of the blades to be unstable, and the effect of ventilation and cooling will be greatly reduced

Images