Filter device

A filter device for filtering dust from air includes a housing, a dust collecting module, a spraying module, and an exhaust. The housing defines an air inlet near a bottom of the housing and an air outlet near a top of the housing. The dust collecting module is installed in the housing between the air inlet and the air outlet. The spraying module is placed in the housing between the dust collecting module and the air outlet. The exhaust is connected to the housing for generating air pressure difference between near the air outlet and near the air inlet, thereby drawing and introducing air containing dust from the bottom of the housing toward the top of the housing via the air inlet.

BACKGROUND

1. Technical Field

The present disclosure relates generally to filter devices, especially, to a filter device for filtering dust from air.

2. Description of Related Art

Dust in air worsens a working environment. When the dust concentration in the air is too high, a dust explosion may be easily generated. A filter device generally includes a filter net and a spraying module to lower the dust concentration in the air. However, the mesh in the filter net is easily blocked, and this decreases the filtering efficiency of the filter device.

Therefore, there is room for improvement within the art.

DETAILED DESCRIPTION

Referring toFIG. 1, a first embodiment of a filter device100for filtering dust from the air includes a housing13, a plurality of filtering nets14, a dust collecting module15, a spraying module16and an exhaust18.

The housing13is a substantially hollow cuboid, and includes a top wall131, a bottom wall133opposite to the top wall131, and a peripheral wall135interconnecting the top wall131to the bottom wall133. An air outlet1311is defined in the top wall131, and is connected to the exhaust18. An air inlet1351is defined in the peripheral wall135adjacent to the bottom wall133. Air containing dust and water containing dust are introduced into the housing13through the air inlet1351. Water is received in the housing13, and a water level is below the air inlet1351. When the exhaust18is working, an air pressure near the air outlet1311is lower than that near the air inlet1351, such that air containing dust is drawn and moves towards the air outlet1311.

The plurality of filtering nets14are securely placed in the housing13adjacent to the air inlet1351, and are spaced from each other for filtering dust from water. A part of each of the plurality of filtering nets14is immersed into the water in the housing13. In an alternative embodiment, the filter device100can include just one filtering net14.

The dust collecting module15is installed in the housing13above the air inlet1351, and includes a receiving member151, a plurality of dust collecting members153, and a water screen generator155. The receiving member151is connected to the peripheral wall135of the housing13, located away from the air inlet1351for a predetermined distance. A plurality of water holes (not shown) are defined in the receiving member151. In the first embodiment, the receiving member151includes two boards1501. The two boards1501are spaced from each other, and each board1501is connected to the peripheral wall135, such that the two boards1501and the peripheral wall135cooperatively form a receiving space1512.

The dust collecting members153are received in the receiving space1512. Also referring toFIGS. 2 through 4, each dust collecting member153is substantially a truncated hollow sphere. The dust collecting member153includes a connecting surface1531, a first end1532, a second end1533, and a plurality of collecting leaves1534. The connecting surface1531has the largest cross section area of the sphere. A shaft hole1535is defined at a center of the connecting surface1531. A plurality of through holes1536are defined on the connecting surface1531around the shaft hole1535. The first end1532and the second end1533are placed on opposite sides of the connecting surface1531, respectively. The first end1532is substantially circular. An inner diameter of the first end1532is greater than a diameter of the shaft hole1535of the connecting surface1531. The second end1533is similar to the first end1532, except that an inner diameter of the second end1533is smaller than the diameter of the shaft hole1535. Each collecting leaf1534extends from the connecting surface1531to the first end1532or to the second end1533, and is substantially arc-shaped and sheet-like. The collecting leaves1534form two groups. One group of the collecting leaves1534is sandwiched between the first end1532and the connecting surface1531, and the other group of the collecting leaves1534is sandwiched between the second end1533and the connecting surface1531. The two groups of the collecting leaves1534are staggeredly arranged on the opposite sides of the connecting surface1531, such that a plurality of dust collecting spaces1537are defined. In the first embodiment, the dust collecting members153are stacked multi-layered in the receiving space1512. Each dust collecting member153is made of plastic.

In an alternative embodiment, the receiving member151can be net-like or a housing can be defining a plurality of water holes. The dust collecting member153can be of other shapes, such as ellipse, cubic, or cone, and can be made of other materials, such as metal. The collecting leaf1534can form a plurality of protrusions to increase a surface area of the collecting leaf1534.

Referring toFIG. 1again, the water screen generator155is a substantially square board defining a plurality of water holes (not shown) to generate water screen. The water screen generator155is placed in the housing13, and is connected to the peripheral wall135of the housing13. In the first embodiment, the water screen generator155is slantingly placed between the air inlet1351of the housing13and the receiving member151. In an alternative embodiment, the filter device100can include another water screen generator155, and the other water screen generator155can be slantingly placed in the air outlet1311and the receiving member151, such that dust in the air can be filtered twice by water screen.

The spraying module16is securely placed on one side of the dust collecting module15opposite to the air inlet1351, and adjacent to the top wall131of the housing13. Thus, water spray generated by the spraying module16falls onto the dust collecting members153, and a falling direction of travel of the water spray is opposite to a moving direction of travel of the air containing dust. In the first embodiment, the spraying module16includes a plurality of spraying nozzles arranged in a straight line.

In a filtering process, the air containing dust first goes through the water screen generated by the water screen generator155under an air pressure, then goes through the dust collecting members153and the water spray generated by the spraying module16, and finally, the air is discharged through the air outlet1311. A plurality of air gaps are formed between two adjacent collecting leaves1534and between two adjacent dust collecting members153, and a water film is formed on the surfaces of the collecting leaves1534. Thus, when the air containing dust moves towards the air outlet1311through the air gaps, the dust contacts with and is adsorbed by the water film. Because the dust collecting members153are acted upon by two forces having opposite directions, in which one force is exerted by the air pressure, and the other force is exerted by the water spray. Then, the dust collecting members153are shaken up or down, and collide with each other, therefore, the contact time is prolonged, and the contact force is increased. As a result, the dust fully contacts with the water film, and is adsorbed more effectively.

In an alternative embodiment, the air outlet1311can be defined in the peripheral wall135, and the air outlet1311and the air inlet1351are defined on opposite sides of the dust collecting module15. A gate for maintenance can be defined in the peripheral wall135. The filter device100can also include a water recycling module (not shown), and the water recycling module can be connected to the housing13, the spraying module16and the water screen generator155to recycle water. A filtering layer can be placed between the spraying module16and the air outlet1311to further filter dust from the air.

Referring toFIG. 5, a second embodiment of a filter device200is similar to the first embodiment of the filter device100, except that the filter device200includes a blast blower29connected to an air inlet2351instead of the exhaust, for making the air pressure near the air inlet2351greater than that near an air outlet2311, such that the air containing dust is introduced from a bottom of a housing20toward a top of the housing20via the air inlet2351.