JPH0735799U - Ventilation fan filter - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention is to provide a ventilation fan filter which is excellent in breathability, has no noise, has desired ventilation and dust collecting effects, and saves resources and can be easily replaced. [Structure] An annular frame body 11 is attached to a protective cover 4 which is detachably attached to a ventilation fan body 2. The opening of the frame body 11 is covered with a filter 20. Furthermore, the filter 20 is pressed toward the suction side by the two intersecting elastic bones 30, 30 whose both ends are locked to the corners of the inner peripheral surface of the frame body 11, and bulges like a dome.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a ventilation fan filter.

[0002]

[Problems to be solved by conventional techniques and devices]

 Generally, the ventilation fan is easy to get dirty, and if the dirt is left unattended, the ventilation capacity will be significantly reduced. Therefore, a ventilation fan filter is installed to prevent this. As this type of ventilation fan filter, for example, a metal frame or a plastic frame whose opening is covered with a dust-collecting air-permeable filter made of non-woven fabric is used. This is done by locking the inside of the ventilating fan to the hole, or by attaching the outer peripheral edge of the frame to the front of the protective cover of the ventilating fan with adhesive tape.

However, in the case of using a metal frame body, it is not possible to completely incinerate, and in the case of using a plastic frame body, a toxic gas is generated at the time of incineration, and it is incinerated. There was a problem that neither of them can be disposed of together with general combustible waste because it damages the furnace. Therefore, in order to prevent the incinerator from being damaged even if the present inventor discards and incinerates it together with general combustible waste, in Japanese Utility Model Application No. 4-2709. We proposed a ventilation fan filter with a frame made of paper.

However, in the above ventilation fan filter, the surface thereof is substantially flat and the area of the opening is small, so that the resistance of the filter is large. For this reason, it became clear that sufficient ventilation could not be obtained, the noise during ventilation was unpleasant, and the desired ventilation and dust collection effects could not be obtained.

Therefore, it is possible to cover the opening with only a coarse filter, but in this case, the small oil particles cannot be completely removed, and the ventilation fan itself is easily soiled.

Further, in the ventilation fan filter according to the conventional example, when the filter becomes dirty, not only the filter but also the plastic and metal frame bodies must be discarded at the same time, which is wasteful.

Further, when a dirty ventilation fan filter is replaced with a new ventilation fan filter, the adhesive tape must be peeled off and replaced, so that oil or the like is likely to adhere to hands and become dirty, which makes the replacement work troublesome. There is a problem.

In view of the above problems, it is an object of the present invention to provide a ventilation fan filter which is excellent in air permeability, has a desired dust collecting effect, and saves resources and can be easily replaced.

[0009]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a ventilation fan filter according to the present invention has an annular frame that covers at least the outer peripheral portion of a protective cover that is detachably attached to a ventilation fan body, a filter that covers the opening of this frame, and both ends. Is locked to the inner peripheral surface of the frame body, and the back surface of the filter is pressed toward the suction side to expand at least one elastic bone. Further, the filter may have a two-layer structure in which a first filter having a coarse mesh facing the suction side and a second filter having a fine mesh facing the discharge side are integrally laminated. The frame body may include a frame body and an inner frame integrated with the outer peripheral edge of the filter, and the inner frame may be detachably engaged with the inner peripheral surface of the frame body. Good. Further, the frame body is provided with projecting mounting tongue pieces from both side rear edges thereof, and then the protective cover is covered with the mounting tongue pieces, and the mounting tongue pieces are inwardly extended from both side rear edge portions of the protective cover. Alternatively, the protective cover attached to the ventilation fan main body and the ventilation tongue main body may sandwich the attachment tongue piece.

[0010]

[Action]

 Therefore, according to the first aspect of the present invention, ventilation is performed through the filter bulged in a dome shape by the elastic bone. According to the second aspect, large oil particles or the like adhere to the first filter, and small oil particles or the like adhere to the second filter. Then, according to claim 3, only the dirty filter can be removed. Further, according to claim 4, the ventilation fan filter is attached to the ventilation fan via the attachment tongue provided on the frame.

[0011]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings of FIGS. The first embodiment includes a frame body 11, a filter 20, an inner frame 21, and elastic bones 30 like the ventilation filter 10 shown in FIGS. 1 to 4. The frame body 11 is made of a thick paper strip and is formed into an annular shape by bonding taper surfaces provided at both ends thereof to each other. The four bent portions 12 are formed in a sawtooth shape having a substantially cross section. By being bent from, it becomes a substantially square plane. Further, a continuous locking groove 13 having a substantially triangular cross section is formed on the inner peripheral surface of the frame body 11. Further, the frame body 11 has a pair of mounting tongue pieces 14 and 14 protruding from the rear edge portions on both sides, and a cutout portion 15 on a side located between the mounting tongue pieces 14 and 14. Are formed.

The frame body 11 does not necessarily have to be formed entirely of virgin pulp, and may be any so-called elastic material, for example, made of 100% recycled paper such as MILPAX manufactured by Pax Co., Ltd. It may be.

The filter 20 is for covering the opening of the frame main body 11 to collect oil and dust by adhering oil, dust, etc. It is preferable that the filter 20 has a self-extinguishing property. A non-woven fabric having a dust collecting property may be used. As shown in FIG. 4, the filter 20 has a two-layer structure in which a coarse first filter 20a arranged on the suction side and a fine second filter 20b arranged on the discharge side are laminated and integrated. I have. The filter 20 is not necessarily limited to the two-layer structure, and may have a single-layer structure or a three-layer or four-layer structure.

As shown in FIGS. 2 and 3, the inner frame 21 is composed of four strip-shaped thick papers 22, 23, 24, 25 that are discontinuously adhered to the outer peripheral edge of the filter 20. 22, 23, 24 are provided with substantially U-shaped notches capable of forming the locking claw portions 26, and the cardboard 25 is provided with a notch portion 27 similar to the notch portion 15 of the frame body 11. It is provided.

The elastic bones 30 are diagonally arranged on the discharge side of the filter 20, and are for pressing the back surface of the filter 20 toward the suction side to bulge into a substantially dome shape. , Thin rods and other natural materials. The portions where the elastic bones 30, 30 intersect are adhered to each other via a small piece 18 of paper impregnated with an adhesive. Further, the dome-shaped bulge does not necessarily have to be formed by two elastic bones 30, and may be formed by one.

Next, the method of assembly and use will be described. As shown in FIG. 2, both ends of the elastic bones 30, 30 attached to the filter 20 are engaged with the corners of the inner peripheral surface of the frame body 11, and the cardboard of the inner frame 21 is attached to the inner peripheral surface of the frame body 11. 22 to 25 are press-fitted, respectively, and the outer peripheral edge portion of the filter 20 is sandwiched between the frame body 11 and the inner frame 21 to assemble. However, in order to prevent the filter 20 from protruding from the opening edge of the frame body 11 during storage or transportation, both ends of the elastic bone 30 are locked to the corners of the inner peripheral surface of the frame body 11 to make the filter compact. By doing so, the deformation of the filter 20 is prevented. At this time, the band-shaped thick papers 22 to 25 of the inner frame 21 are folded inside.

Then, when in use, the belt-shaped thick papers 22 to 25 of the inner frame 21 are raised, and these are pushed along the inner peripheral surface of the frame body 11, and the lower end edge of the frame body 11 and the lower edges of the belt-shaped cardboards 22 to 25 are pushed. By aligning the parts on the same plane and engaging the locking claws 26 of the belt-shaped cardboards 22 to 25 that are caused outwardly with the locking grooves 13 of the frame body 11 (FIG. 4), the assembly work can be performed. Complete.

The ventilation fan filter 10 according to the present embodiment is attached as follows. First, as shown in FIG. 1, the ventilating fan 1 to which the ventilating fan filter 10 is attached has a claw protruding from both side rear edges of the protective cover 4 in the engaging hole 2a of the ventilating fan main body 2 fixed to a wall opening (not shown). After engaging the portion 4a, the blade 6 is assembled by fixing the blade 6 to the rotation shaft of the motor 3 protruding from the central opening 5 of the protective cover 4.

Then, the frame body 11 of the ventilation fan filter 10 is covered from the front side of the protection cover 4, and then the claw portion 4 a of the protection cover 4 is removed from the engagement hole 2 a to remove the protection cover 4 from the ventilation fan body 2. Slightly separate, fold the attachment tongue 14 of the ventilation fan filter 10 into the gap between the ventilation fan body 2 and the protective cover 4, and again engage the claw portion 4a of the protection cover 4 with the engagement hole 2a of the ventilation fan body 2. The attachment of the ventilation fan filter 10 is completed by holding the tongue piece 14 between the ventilation fan main body 2 and the protective cover 4.

The ventilating fan filter 10 according to the present embodiment is made of a natural material such as paper and bamboo that can be easily incinerated, and therefore can be disposed of together with general incinerated waste, and can be disposed even when incinerated. It does not generate poisonous gas, does not adversely affect the environment, and does not damage the wall of the incinerator. Further, since the filter 20 bulges like a dome through the elastic bone 30, the blade 6 does not hit the filter 20 and is quiet. Further, the elastic bone 30 causes the filter 20 to bulge into a dome shape, and the surface area thereof is increased as compared with the conventional example. Therefore, there is an advantage that the resistance of the filter 20 during ventilation is reduced and the air permeability is improved.

In the ventilation fan filter 10 according to the second embodiment, as shown in FIGS. 5 and 6, when the filter 20 is detachably attached to the frame main body 11 via the inner frame 21 as shown in FIGS. On the other hand, in the case where the filter 20 is directly attached to the frame body 11, the frame body 11, the filter 20 and the elastic bones 30, 30 are formed.

That is, the frame main body 11 is made by bending two strip-shaped thick paper sheets in parallel along the lengthwise direction and adhering them together, and then bending them at a right angle from the appropriate position in the plate thickness direction. They are connected to each other to form a substantially square shape on a plane. However, the cardboard is folded with a slight offset in the width direction, and the annular edge portion 16 is formed in a non-overlapping portion.

Further, as in the first embodiment described above, a part of one cardboard is cut out to form a fitting recess 15 and a part of the overlapped part of both cardboards has a substantially U-shape. The notch is formed so as to form the attachment tongue piece 14. Therefore, the tongue piece 14 is projected from both side rear edges of the frame body 11 by causing the tongue piece 14 formed by making the above-mentioned cut after connecting the two folded and bent cardboards.

According to the present embodiment, since the tongue piece 14 is formed by making a cut in a part of the strip cardboard forming the frame body 11, there is no waste when cutting the base paper, and the yield is good. There is.

The filter 20 covers the front opening of the frame 10 and attaches oil, dust, etc. to collect dust, as in the first embodiment. The outer peripheral portion of the filter 20 is attached integrally to the annular edge portion 16 of the frame body 11.

The elastic bone 30 is made of the same material as that of the first embodiment described above, and as shown in FIG. 6, both ends thereof are locked to the inner corners of the frame body 11, and A substantially L-shaped seal 31 is fixed to the frame main body 11 by being attached to a corner portion of the annular edge portion 16. Therefore, the elastic bones 30, 30 press the back surface of the filter 20 toward the suction side, and the filter 20 bulges into a substantially dome shape. Since the other points are almost the same as those in the first embodiment, the description thereof will be omitted.

In the first and second embodiments described above, a flame-retardant material may be applied to the surfaces of the frame body, the filter, etc., and a paint for enhancing oil resistance may be applied as appropriate. Good.

[0028]

[Effect of device]

 As is apparent from the above description, according to the ventilating fan filter of the first aspect of the present invention, the elastic bone presses the back surface of the filter toward the suction side, so that the filter bulges in a dome shape toward the suction side. Therefore, a ventilation fan filter having a filter having a larger surface area than the conventional example can be obtained. Therefore, the resistance of the filter during ventilation is reduced, and high ventilation is obtained. As a result, there is no noise during ventilation, and a ventilation fan filter having desired ventilation and dust collecting effects can be obtained. According to claim 2, the first filter with coarse mesh adsorbs large oil particles and the like, and the second filter with fine mesh adsorbs small oil particles and the like, so that the filter can be maintained while maintaining desired air permeability. Extends the life of. Further, according to claim 3, only the filter can be discarded by removing the inner frame from the frame body, so that resources can be saved. Further, according to claim 4, since the mounting tongues protruding from both rear edges of the frame are supported by being sandwiched between the ventilation fan main body and the protective cover, the ventilation fan can be inserted from the gap between the ventilation fan main body and the protective cover. The ventilation fan filter can be replaced simply by folding in or removing the filter mounting tongue. Therefore, oil or the like does not adhere to the hands, etc., and the replacement work becomes easy. Particularly, according to claim 4, it is not necessary to provide a mounting recess, a hole or the like at a predetermined position of the ventilation fan, and the size of the frame main body is set to an appropriate size that can be fitted to the protective cover. Since it can be attached to other ventilation fans, it has the effect of providing a versatile ventilation fan filter.

[Brief description of drawings]

FIG. 1 is an exploded perspective view for explaining a mounting structure of a ventilation fan filter according to a first embodiment.

FIG. 2 is an exploded perspective view of the ventilation fan filter shown in FIG.

FIG. 3 is a developed view of the filter shown in FIG.

FIG. 4 is a sectional view of a main part of the ventilation fan filter shown in FIG.

FIG. 5 is an exploded perspective view for explaining the attachment structure of the ventilation fan filter according to the second embodiment.

6 is a perspective view of the ventilation fan filter shown in FIG. 5. FIG.

[Explanation of symbols]

1 ... Ventilation fan, 2 ... Ventilation fan main body, 4 ... Protective cover, 6 ... Blade, 10 ... Ventilation fan filter, 11 ... Frame main body, 14 ... Attachment tongue, 20 ... Filter, 20a ... 1st filter, 20b ... 2nd filter , 21 ... inner frame, 26 ... locking claws, 30 ... elastic bones.

Claims (4)

[Scope of utility model registration request] 1. A ring-shaped frame body that covers at least an outer peripheral portion of a protective cover that is detachably attached to a ventilation fan body, a filter that covers an opening portion of the frame body, and both ends are attached to an inner peripheral surface of the frame body. A ventilation fan filter, comprising: at least one elastic bone that is stopped and presses the back surface of the filter toward the suction side to bulge into a dome shape. 2. The filter comprises a coarse first filter facing the suction side and a fine second filter facing the discharge side.
The ventilation fan filter according to claim 1, which has a two-layer structure in which a filter and a filter are integrally laminated. 3. The frame body comprises a frame body and an inner frame integrated with an outer peripheral edge of the filter, wherein the inner frame is detachably engaged with an inner peripheral surface of the frame body. The exhaust fan filter according to claim 1 or 2, which is characterized. 4. A mounting tongue piece is projected from both side rear edges of the frame body, the frame body is covered on the protective cover, and the mounting tongue piece is inward from both side rear edge portions of the protection cover. The ventilation fan filter according to any one of claims 1 to 3, wherein the protection cover attached to the ventilation fan main body and the ventilation tongue body sandwich the attachment tongue piece.