JPH0731119U - Filter for ventilation fan - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a filter for a ventilation fan, which allows easy and reliable attachment and separation of a filter membrane and has excellent regeneration efficiency. [Structure] A claw piece 8 having a pointed top is formed on the brim surface 5 of the metal foil frame 1, and the claw piece 8 is pierced and penetrated through a filter membrane 9 bonded to the brim surface 5 The piece 8 is further bent to fix the filter membrane 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a replaceable ventilation fan filter that is attached to the suction side of a ventilation fan installed in a kitchen or bathroom, and is used to filter oil and dust, and particularly to an aluminum foil (below This refers to a structure in which a frame is formed of a metal foil such as "aluminum foil") and a non-woven fabric filter membrane made of any material is attached to the frame.

[0002]

[Prior art]

 As a ventilation fan filter that is installed and used to cover a ventilation fan in a kitchen or the like, a structure in which a non-woven fabric filter membrane is attached to an aluminum foil frame is known. This is done by applying a resin coating to an aluminum foil in advance, press-molding this to form a frame body having an opening, and the filter membrane is integrally attached to the peripheral edge portion of the opening by heat bonding. It was

[0003]

[Problems to be solved by the device]

 Although the above-mentioned conventional one can firmly attach the filter membrane, the aluminum foil portion other than the opening peripheral edge portion of the frame body for adhering the filter membrane on the processing and molding, for example, the frame peripheral surface or the frame at the time of press molding processing. Unnecessary parts cut off from the body had to be coated with a resin, which inevitably resulted in higher manufacturing costs.

Further, the aluminum foil frame can be reused after being used as a ventilation fan filter. However, in the above-mentioned conventional technology, since the filter membrane is firmly adhered, After using the filter, it was difficult to remove the filter membrane containing a large amount of oil and dust from the frame, that is, it was difficult to separate and discard, and it was difficult to recycle. Furthermore, the unnecessary portion cut off from the frame has to be removed and the resin coating must be removed for recycling, resulting in high processing costs and poor recycling efficiency.

The present invention has been made in view of the above problems of the conventional ventilation fan filter, and an object thereof is to easily and surely attach and remove the filter membrane. (EN) It is possible to provide a ventilation fan filter that has a simple structure that can reduce the manufacturing cost and can enhance the regeneration efficiency.

[0006]

[Means for solving the problem]

 In order to solve the above-mentioned problems, the ventilating fan filter of the present invention forms a bendable claw piece on the filter film joint surface of the metal foil frame, and allows the claw piece to penetrate through the joined filter membrane. It is characterized by the fact that it is fixed.

[0007]

[Action]

 When the filter film is pierced into the nail piece that has been erected on the surface of the frame body and the nail piece is further bent from this state, the filter film is bonded to the frame body and fixed. After using the filter, the claw pieces can be re-started to release the filter membrane, and the filter membrane can be pulled out and separated from the frame.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a frame 1 of a ventilation fan filter is formed by press-molding a metal foil such as an aluminum foil, and has a base surface 2 of an appropriate shape that can face a mounting surface around the ventilation fan, and its center A wall surface 4 with a cylindrical shape or other arbitrary shape having an appropriate height for forming an opening 3 for a ventilation fan is erected in the portion, and a rising surface front end of this wall surface 4 has a collar surface 5 parallel to the base surface 2 and having a slightly width. A large opening 6 having an arbitrary shape is formed in the collar surface 5. The opening 6 is divided and formed by a rib strip 7 continuous with the collar surface 5 as required. Further, each edge of the frame body 1 is formed as a curled or other rounded edge for safety.

A pointed claw piece 8 that can be bent as a projection at substantially constant intervals is provided on the collar surface 5, and the tip of the projection faces the substantially central direction of the opening 6, and in the bent state it is directed outward. It is pressed to form a notch. Further, the rib strip 7 formed in the opening 6 is also formed with notches so that the claw pieces 8 face the claw pieces at substantially constant intervals.

As shown in FIG. 2, the claw piece 8 is formed so that the top part thereof is sharpened by the notches of the two sides 8a and 8b so that a filter film 9 described later can easily be pierced. is there. If the apex is a pointed shape, for example, as shown in FIG. 3, a shape edged by cutting the four sides 8c to 8f (see FIG. 3A) or a shape edged by cutting the curved surface 8g (same as FIG. (See FIG. (B)).

Then, the claw pieces 8 formed on the collar surface 5 and the rib strip 7 are raised perpendicularly to the respective forming surfaces (see FIGS. 4A and 4A), and a non-woven fabric of any material is used. A substantially circular filter membrane 9 formed by using the above-mentioned method is pierced into these claw pieces 8 and joined to the collar surface 5 (see FIGS. 2B and 2B), and the claw pieces 8 are penetrated through the filter membrane 9 From this state, the claw piece 8 is bent until the projection tip thereof faces the outside direction of the opening 6, that is, in the direction opposite to the substantially central direction of the opening 6 (see (C) and (c) in the same figure). The filter membrane 9 is fixed by being sandwiched between the collar surfaces 5.

Since the present embodiment is configured as described above, the filter membrane 9 is framed by a simple operation of sticking the filter membrane 9 into the claw piece 8 and bending the claw pieces 8 through the claw pieces 8. It can be attached to the body 1. In this case, since the filter film 9 is fixed by the claw pieces 8 formed at appropriate intervals on the peripheral edge of the opening 6 and the claw pieces 8 formed along the ribs 7 that divide the opening 6, Even if the intake / exhaust flow passing through the opening 6 during the ventilation operation of the ventilation fan is large, the filter membrane 9 is not partially expanded or a gap is generated, and the filter membrane 9 can be securely attached. . Therefore, if the ventilation fan filter of the present embodiment is attached to the ventilation fan 11, oil and dust in the air can be reliably and stably attached to the filter membrane 9 and filtered.

After using the filter, the claw piece 8 is raised again to release the fastening, and the filter membrane 9 is pulled out from the collar surface 5, so that the filter membrane 9 can be easily separated from the frame body 1. You can Therefore, the frame 1 can be reused as it is, so that the regeneration efficiency can be effectively increased.

In the present invention, the claw pieces 8 may be bent in any of four directions with respect to the opening 6, but in order to securely fix the filter film 9, the claw pieces 8 may be bent in any direction. It is preferable that the claw pieces 8 are provided in different directions so that they do not become the same direction. Further, in consideration of the wind pressure of the intake and exhaust flow passing through the opening 6, in order to prevent the filter membrane 9 from loosening, It is more preferable that the claw pieces 8 formed along the peripheral edge of the opening 6 be provided so as to be bent toward the outside of the opening 6. Further, it is preferable that the claw pieces 8 on the periphery of the opening 6 are uniformly formed in the collar surface 5 so that the hooking positions of the claw pieces 8 on the filter membrane 9 are not biased.

When the opening 6 is not divided by the rib strip 7, a claw piece 8 is formed on the periphery of the opening 6 as shown in FIG. 5, and when the opening 6 is divided by the rib strip 7, As shown in FIG. 6, if the claw pieces 8 facing each other are bent in the opposite directions and pulled to the periphery of the opening 6 and the rib strip 7 so as to pull the filter membrane 9, the filter membrane 9 is fixed. The bulge and the gap of 9 are not likely to occur, and the filter membrane 9 can be stably fixed.

Further, the size and the number of the claw pieces 8 to be formed can be appropriately selected according to the size of the entire filter and the intake / exhaust flow rate, and an appropriate forming method or means can be adopted. Further, in the present embodiment, the mounting position of the filter membrane 9 with respect to the frame body 1 is not limited to the mode shown in FIG. 1, and as shown in FIG. It can also be attached by the procedure.

The ventilating fan filter of the present invention is not limited to being used only as a filter to be attached to a domestic ventilating fan, and can be applied to a large ventilating fan that is integrally installed as a system kitchen in a restaurant kitchen or the like. Can be used.

[0018]

[Effect of device]

 As described above, according to the filter for a ventilation fan of the present invention, a claw piece with a pointed top is formed to rise on the surface of the frame body, and the claw piece is pierced with a filter membrane to be fixed to the conventional art. The filter membrane can be securely attached to the frame without using such an adhesive. Therefore, the processing step of applying the resin coating to the aluminum foil can be omitted, and the manufacturing cost can be reduced.

Further, by providing such a claw piece along the peripheral edge of the frame opening or along the rib strip that divides the opening, the filter membrane can be fixed more reliably and stably, and the filter membrane can be fixed during ventilation operation. It is possible to prevent the filter membrane from partially bulging or forming a gap due to the intake / exhaust flow passing through the filter membrane, and to maintain a normal filtering operation as a filter.

Furthermore, after using the filter, the filter membrane can be easily removed from the frame body, and the frame body and the filter membrane can be separately disposed of. Therefore, the frame body which is not resin-coated and the cut-off portion at the time of press molding can be reused as it is, and the regeneration efficiency can be remarkably improved as compared with the prior art.

[Brief description of drawings]

FIG. 1 shows an embodiment of a filter for a ventilation fan according to the present invention, (A) is a plan and rear view thereof, and (B) is I of (A).
It is a longitudinal cross-sectional view taken along the line I.

FIG. 2 shows a claw piece related to the ventilation fan filter of FIG.
(A) is the perspective view, (B) is the longitudinal cross-sectional view.

FIG. 3 shows another embodiment of the pawl piece related to the filter for the ventilation fan of the present invention, and (A) and (B) are plan views thereof.

FIG. 4 shows a procedure for attaching a filter membrane to a frame body, (A), (B) and (C) are perspective views of a nail piece portion, and (a), (b) and (c) are nails. It is a longitudinal cross-sectional view of one part.

FIG. 5 is a plan view and a rear view of another embodiment of the ventilation fan filter.

FIG. 6 is a plan view and a rear view of still another embodiment of the filter for the ventilation fan.

FIG. 7 is a vertical cross-sectional view of an example in which the attachment position of the filter membrane is different in the ventilation fan filter of FIG.

[Explanation of symbols]

 1 Frame 2 Base surface 3, 6 Opening 4 Wall surface 5 Collar surface 7 Rib strip 8 Claw piece 9 Filter membrane 11 Ventilation fan

Claims (1)

[Scope of utility model registration request] 1. A bendable claw piece is formed on a filter film bonding surface of a metal foil frame, and the claw piece is penetrated through the bonded filter film to fix the filter film. Filter for ventilation fan.