JPH0544576B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a ventilation fan with a filter, which is provided with a filter member on the front surface of which is detachably attached and has a filter element integrally stretched over a frame body.

[Prior Art] Conventional ventilation fans with filters of this type are disclosed in, for example, Japanese Utility Model Application No. 61-89730, Japanese Utility Model Application Publication No. 61-89731, and Japanese Utility Model Application No. 61-89731.
As disclosed in Publications No. 61-89732 and No. 61-89733, a filter member having a structure in which a filter element is integrally stretched on the back side of a frame with a symmetrical vertical grid is attached to the ventilation fan body. It is detachably attached to a filter case attached to the front of a front panel that forms a ventilation path on the front. The filter case is removably attached to the front panel by a locking structure provided on the top and bottom of itself and the corresponding top and bottom of the front panel side, and the filter member is also connected to the filter case with a similar structure. It is removably attached. When the filter member is installed, the line of symmetry of its grid lies on the center of the fan.

This type of ventilation fan with a filter uses a filter element to collect dirt that is sucked in along with the ventilation flow, thereby preventing the ventilation path, fan, etc. of the ventilation fan from becoming dirty.

[Problems to be Solved by the Invention] In the above-mentioned conventional ventilation fan with a filter, the configuration of the filter is complicated and has a large number of parts, and the grid of the filter member is symmetrical and coincides with the center of the fan. The rotating fan blades simultaneously cross multiple ribs that make up the lattice, which amplifies the harsh wind noise. This is more noticeable when there are four wings or an even number of wings.

The present invention has been made to solve the problems of the conventional filters, and provides a filter that has a simple structure, has a small number of parts, and generates less wind noise due to the interaction between the lattice of the filter member and the rotating fan. The purpose is to obtain a ventilation fan.

[Means for Solving the Problems] A ventilation fan with a filter according to the present invention has a lintel structure that protrudes forward at the upper and lower edges of the front panel that forms a ventilation path in which the fan fits in the front of the ventilation fan body. A filter member, in which a filter element is integrally stretched over a frame body having a symmetrical shape of a plurality of ribs and a lattice at the front opening, is attached to the upper and lower holding members forming a sill structure and a sill structure. It is mounted at a position offset from the center of the fan.

[Operation] In this invention, since the line of symmetry of the lattice of the filter member is shifted from the center of the fan, a plurality of blades will not cross the ribs of the lattice at the same time when the fan rotates. Furthermore, the mismatch between the center of the fan and the line of symmetry of the grid does not cause any discomfort in appearance because the fan is hidden by the filter element.

[Example] The drawings all show a ventilation fan with a filter as an example of the present invention. The ventilation fan main body 1 is constructed by assembling a motor, a fan 2, an opening/closing shutter, etc. onto a rectangular cylindrical frame. A front panel 3 forming a ventilation path through which the fan 2 faces is detachably attached to the front surface of the ventilation fan body 1. A structure related to the attachment of a filter is added to the front panel 3, and a filter member 6 formed by integrally extending a filter element 5 to the frame 4 is detachably attached. Upper and lower holding members 7, which project forward and form a lintel structure and a threshold structure, are hooked onto the upper and lower edges of the front panel 3 in a hooking structure. The upper holding member 7 has an eave shape and has a recess formed inside thereof for holding the upper side of the frame 4 of the filter member 6. The lower holding member 7 has a larger protrusion than the upper side, and has an open upper container that receives and holds the lower side of the frame 4 of the filter member 6 and also serves as an oil receiver to receive oil stains from the filter member 6. formed into a structure. The filter member 6 includes a frame 4 integrally formed with a lattice 8 joined at both ends to a rectangular frame defining a suction opening;
A filter element 5 is integrally stretched on the back surface of the filter element 5. Thin wall portions are formed on the top and bottom of the frame 4, and side walls are formed on the left and right sides of the back surface, respectively. The lattice 8 is composed of a plurality of diagonally provided ribs that are symmetrical about the diagonal of the frame. The filter member 6 is mounted at a position where the line of symmetry A-A of the lattice 8 is offset from the center of the fan 2 (in FIG. 3, the filter member 6 is shown offset downward). ).

Therefore, the filter-equipped ventilation fan of this example can be attached to the holding members 7 above and below the front panel 3 attached to the front of the ventilation line main body 1 in the same way as a door stand, and when the ventilation fan is operated, the suction is removed. All of the trapped air will pass through the filter element 5. Filter element 5 removes oil droplets contained in the air that is taken in.
The oil is collected and adheres to the filter element 5 as oil stains. The fluid oil stains gradually flow down the filter element 5 and finally reach the filter member 6.
It is received in a holding member 7, which also serves as an oil receiver, in which the lower side of the oil container is received.

The filter member 6 attached to the front panel 3 is located at a position where the symmetry line A-A of the grid 8 is shifted from the center of the fan 2, as described above. Therefore, a plurality of blades of the rotating fan 2 do not cross the ribs forming the grid 8 at the same time, reducing harsh wind noise and realizing quiet ventilation operation. Even if the symmetry line A-A of the grid 8 and the center of the fan 2 are misaligned, the fan 2 is hidden by the attachment of the filter member 6, so there is no sense of mismatch, and there is no discomfort in appearance.

[Effects of the Invention] As is clear from the above description of the embodiments, according to the present invention, the line of symmetry of the lattice of the filter member is shifted from the center of the fan. Since it no longer crosses the ribs, wind noise is reduced, resulting in quiet operation. Furthermore, the mismatch between the center of the fan and the line of symmetry of the lattice causes no discomfort in appearance since the fan is hidden by the filter element, and the configuration of the filter is simplified.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a ventilation fan with a filter as an embodiment of the present invention, FIG. 2 is a sectional view thereof, and FIG. 3 is a front view thereof. In the figure, 1 is a ventilation fan body, 2 is a fan, 3 is a front panel, 4 is a frame, 5 is a filter element, 6 is a filter member, 7 is a holding member, and 8 is a grid. In addition,
The same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A plurality of symmetrical ribs are provided on the upper and lower retaining members that protrude forward and form a lintel structure and a sill structure on the upper and lower edges of the front panel that forms the ventilation path in which the fan fits in the front of the ventilation fan body. The fan is characterized in that a filter member, in which a filter element is integrally stretched over a frame body having a front opening having a grid-shaped grid, is mounted at a position where the line of symmetry of the filter member is offset from the center of the fan. Ventilation fan with filter.