JP2002071180A - Filter for ventilation fans - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter 1 for ventilation fans which is easily mounted irrespective of the shape of a casing 33 of a direct mounting type ventilation fan 30, and has an air tightness with the casing 33. SOLUTION: The filter allows a filter unit 20 to be removably mounted in an outer frame unit 10. A tube 16 contacted to a conical part 38b of a casing 33 is formed in the frame unit 10. A seal 12 is mounted on the outer wall of the tube 16 to hermetically communicate a conical part 38b of a vent hole 38 of the ventilation fan 30 with the tube 16. A fixture 13 is mounted on the top end or the inner wall of the tube 16 to mount the frame unit 10 on the casing 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter for a ventilation fan, in which a filter for removing oil and dust in the air is detachably mounted on a ventilation fan directly attached to a wall or a ceiling.

[0002]

2. Description of the Related Art As a ventilator for quickly discharging steam and smoke generated in a commercial kitchen or a general home kitchen to the outside,
2. Description of the Related Art A direct-mounted ventilation fan and a range hood with a built-in ventilation fan are generally known. The types of the direct-attached ventilation fans are roughly classified into those in which the motor serving as the power source of the rotary blades is on the intake side and those on the exhaust side of the rotary blades.

[0003] Ventilation fans whose motors are installed on the exhaust side of the rotating blades are currently the mainstream of direct-mount type ventilation fans, and as a filter device applied to such ventilation fans,
There is one disclosed in JP-A-11-230593. The filter device described in the above publication is a device in which a filter member is detachably attached to the filter device by being attached to a casing by a fixing member having an elastic spring or the like.

[0004]

However, the casing has various shapes depending on the manufacturer's standards. For example, some casings have a sharp or rounded corner, In some cases, the front surface of the casing is not flat and has a protruding portion.
When the filter device described in the above publication is applied to such a ventilation fan, a gap may be generated between the filter device and the casing. That is, when a gap is formed between the filter device and the casing, an air current such as oily smoke is exhausted from the gap without passing through the filter material, and there is a possibility that the rotating blades of the ventilation fan and the like are soiled.

Accordingly, an object of the present invention is to provide a filter device which can be easily attached regardless of the shape of a casing of a direct-mount type ventilation fan and has airtightness between the casing and the casing in order to solve the above-mentioned problems. It is in.

[0006]

In general, when a filter device is mounted on a ventilation fan, the filter device is mounted on a casing of the ventilation fan. However, since the front shape of the casing differs depending on the standard of each manufacturer, the front shape of the casing and the filter are different. Matching the shape of the exhaust side of the device limits the ventilation fans to which the filter device can be applied, and cannot be applied to a wide variety of ventilation fans. Therefore, the present inventor has pointed out that, as a common point of a variety of ventilation fans, a ventilation hole formed in a substantially central portion of a casing has a cylindrical shape having the same diameter from an end on an exhaust side to a vicinity of a front surface of a rotary blade of the ventilation fan. Focusing on a conical shape whose diameter gradually widens from there to the opening on the intake side, air-tight sealing between the conical portion and the filter device allows oil smoke and the like in the air to be filtered. The present invention has been completed from the viewpoints of preventing inflow from the gap between the device and the casing of the ventilation fan and reliably removing oily smoke and the like by the filter material.

That is, a ventilation fan filter device according to claim 1 of the present invention comprises an outer frame unit attached to a casing of a direct-attachment type ventilation fan, and a filter unit for removing oil and dust in the air. An apparatus in which a unit is detachable from an outer frame unit, wherein the outer frame unit forms a circular hole communicating with a vent formed on an inner peripheral side of the casing at a substantially central portion of a flat plate portion. A cylindrical portion adapted to a conical portion gradually expanded in diameter toward the intake side of the ventilation hole of the casing extends from the inner peripheral portion of the circular hole toward the exhaust side, and a filter is provided on the intake side of the flat plate portion. A frame body having a mounting section for detachable units,
It is characterized by comprising a sealing member for hermetically sealing a gap between the cylindrical portion and the casing of the ventilation fan, and a fixing member for attaching the frame to the casing.

In other words, the ventilation fan filter device of the present invention is a device in which the filter unit is detachably attached to the outer frame unit, and the outer frame unit includes a frame, a seal member, and a fixing member. . The frame body has a circular hole formed in a substantially central portion of the flat plate portion, and the distal end portion is formed at the conical portion of the ventilation hole of the casing in order to communicate the circular hole with the ventilation hole formed on the inner peripheral side of the casing. The contactable cylindrical portion extends from the inner peripheral portion of the circular hole toward the exhaust side, and a mounting portion is formed on the intake side of the flat plate portion for mounting the filter unit. Further, the seal member is mounted on the outer peripheral surface of the cylindrical portion, and seals the cylindrical portion and the surface of the ventilation hole of the casing so that the cylindrical portion and the ventilation hole of the casing are air-tightly communicated. The intake can be performed only from the intake side, and the filter unit mounted on the intake side of the cylindrical portion can prevent dirt from adhering to the rotating blades and the like of the ventilation fan. Further, the fixing member is for easily fixing the outer frame unit to the casing.

According to a second aspect of the present invention, there is provided a filter for a ventilation fan according to the first aspect of the invention, wherein the oil and dust in the air are prevented from adhering to rotating blades of the ventilation fan. Unit with a filter frame,
It is composed of a filter support member and a filter material so that each component can be separated. The filter frame portion has a shape that can be attached to and detached from a mounting portion formed on the intake side of the outer frame unit, and the filter material may be any that can remove oily smoke and the like in the air. This is for fixing the filter material to the filter frame. That is, the filter unit according to claim 2 is characterized in that the action of removing oily smoke and the like can be restored at low cost by replacing only the dirty filter material.

According to a third aspect of the present invention, there is provided a filter device for a ventilation fan according to the second or third aspect, wherein the fixing member has a hook-like tip, and the body is formed of a spring or rubber. The base end is connected to the distal end or inner periphery of the cylindrical portion, extends along the surface of the ventilation hole of the casing to the back side of the casing, and the hook-shaped distal end is attached to the back side of the casing. It is characterized in that the outer frame unit is fixed to the casing by the urging force of the telescopic member generated at that time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 5 shows a filter device 1 (FIGS.
It is a longitudinal section showing an outline of ventilation fan 30 to which 4) is applied. The ventilation fan 30 includes a rotating blade 31, a motor 32 for rotating the rotating blade 31, and a casing 33. A ventilation hole 35 is formed in a wall 34 of the building, and the motor 32 is ventilated by an appropriate mounting member 36. A drive shaft 37 installed near the center of the hole 35 and protruding from the motor 32 toward the intake side.
, A rotating blade 31 is attached to the wall, and a casing 33 is installed on the indoor side of the wall 34 of the building. Casing 3
3 conceals an inner edge portion of a ventilation hole 35 formed in the wall 34 when the ventilation fan 30 is installed on the wall 34 of the building to improve the appearance as viewed from the inside of the building. A vent hole 38 having a diameter larger than the diameter of the rotating member 31 at the time of rotation is provided at a substantially central portion. The ventilation hole 38 has a cylindrical portion 38a having the same diameter from the rear side of the casing 33 to the vicinity of the front surface of the rotary blade 31 and gradually increases in diameter from the cylindrical portion 38a to the front surface of the casing 33. And a conical portion 38b which is a target. In FIG. 5,
The structure at the end on the exhaust side of the ventilation hole 35 is omitted because there is no direct relationship in installing the filter device 1 according to the present invention.

FIG. 1 is a longitudinal sectional view in which a filter device 1 of the present invention is applied to a ventilation fan 30. The filter device 1 includes an outer frame unit 10 and a filter unit 20. The outer frame unit 10 is attached to a ventilation fan 30 by a fixing member 13, and the filter unit 20 is mounted on the intake side of the outer frame unit 10. It is. When the filter device 1 is attached to the ventilation fan 30, the sealing member 1
2 and the casing 3 of the outer frame unit 10 and the casing 3
The surface of the third conical portion 38b is hermetically sealed to ensure that the air to be exhausted passes through the filter unit 20.

2A and 2B show the outer frame unit 10. FIG. 2A is a perspective view of the outer frame unit 10 viewed from the intake side, and FIG. It is the perspective view seen from the side. The outer frame unit 10 is obtained by installing a seal member 12 and a plurality of fixing members 13 on a frame body 11. The frame 11 has a circular hole 1 at a substantially central portion of the flat plate portion 15.
4, a cylindrical portion 16 is vertically extended from the inner peripheral portion of the circular hole 14 to the exhaust side, and a mounting portion 17 is provided on the intake side of the flat plate portion 15.
(First side wall portion 17a, upper first groove portion 17b, lower first groove portion 17c), and the sealing member 12 is attached to the distal end portion or the outer peripheral portion of the cylindrical portion 16. The fixing member 13 is connected to an inner peripheral portion or a distal end portion of the cylindrical portion 16.

That is, in the outer frame unit 10, as shown in FIG. 1, the distal end of the cylindrical portion 16 is brought into contact with the conical portion 38 b of the ventilation hole 38 of the casing 33, and the cylindrical member 16 is communicated with the cylindrical portion 16 by the seal member 12. The pores 38 are airtightly communicated. As a result, the air containing oil smoke and the like flows into the ventilation fan 30 only from the circular hole 14 of the frame 11. Therefore, if a filter is installed on the intake side of the circular hole 14 of the frame 11, the rotating wings 31 and the like of the ventilation fan 30 can be protected from dirt such as oil smoke.

The seal member 12 may be made of an elastic material such as rubber or synthetic resin.
The shape and material may be changed as appropriate as long as the gap generated between the hole 8b and the hole 8b can be hermetically closed. Note that, as described above, the installation site of the seal member 12 is determined in advance by the cylindrical portion 16.
May be attached to the outer peripheral surface of the outer frame unit 10.
Alternatively, the sealing member 12 separately prepared may be installed at a predetermined portion of the conical portion 38b with which the distal end portion of the cylindrical portion 16 abuts by means such as adhesion.

The fixing member 13 has a hook-like distal end, a body made of an elastic member such as a spring or rubber, and a base end connected to the distal end or the inner peripheral portion of the cylindrical portion 16. is there.
As shown in FIG. 1, the fixing member 13 extends from the conical portion 38b of the casing 33 along the cylindrical portion 38a,
The outer frame unit 10 is fixed to the casing 33 by the urging force of a spring or the like generated by hooking the hook-shaped tip to the exhaust side end of the ventilation hole 38 of the casing. In addition, the portion connecting the base end of the fixing member 13 is preferably a portion through which air from which oil smoke or the like has been removed passes in order to prevent dirt such as oil smoke from attaching to the fixing member 13. The portion that does not hinder the operation of the cylinder 12 is the tip or the inner periphery of the cylindrical portion 16.

The circular hole 14 is provided in the ventilation hole 3 of the casing 33.
8 is larger than the diameter of the cylindrical portion 38a,
The diameter is smaller than the maximum diameter of b. Usually, the diameter of the cylindrical portion 38a of the casing 33 is set by the diameter of the rotary blade 31 and is substantially the same regardless of the specification of the casing 33 of the manufacturer.
It can be easily set for each diameter. Thereby, when the outer frame unit 10 is mounted on the casing 33, the cylindrical portion 16 having the same diameter as the circular hole
8b. However, it is assumed that the length of the cylindrical portion 16 is sufficiently long.

If the length of the cylindrical portion 16 is short, the cylindrical portion 1
6 and the conical portion 38b are formed in the cylindrical portion 16b.
Is not airtightly closed by the sealing member 12 attached to the
Oil smoke and the like may flow from the gap. For this reason, the setting of the length of the cylindrical portion 16 is set to be long enough to be applicable to all currently available ventilating fans 30, or the cylindrical portion 16 is formed into a bellows shape composed of a plurality of cylindrical bodies. It is desirable to be formed and expandable.

The mounting portion 17 is composed of a first side wall portion 17a extending from the outer edge portion on the intake side of the outer frame unit 10, and first groove portions 17b and 17c formed vertically.
The width of the first side wall 17a is equal to the width of the filter unit 20 described later.
, The upper first groove 17b is formed deeper than the lower first groove 17c. The method of attaching the filter unit 20 to the outer frame unit 10 is as follows.
The lower end of the filter unit 20 is dropped into the lower first groove 17c while the upper end of the rectangular flat filter unit 20 is fitted in the upper first groove 17b. When the filter unit 20 is mounted, the lower end of the filter unit 20 is positioned at the lower first groove 17c.
And the upper end of the filter unit 20 is fitted in the groove of the upper first groove 17b.

3A and 3B show the filter unit 20. FIG. 3A is a perspective view of components of the filter unit 20 as viewed from the exhaust side, and FIG. 3B is an assembled filter unit 20. Is viewed from the exhaust side. The filter unit 20 includes a filter frame portion 21 having a shape detachable from a mounting portion 17 formed on a suction-side surface of the outer frame unit 10 and a filter material 23 capable of adsorbing oily smoke and the like in the air.
And a filter support member 22 for fixing the filter material 23 to the filter frame 21.

When the filter material 23 sufficiently absorbs oily smoke and the like and the action of removing the oily smoke and the like is reduced, the filter unit 23 removes the dirty filter material 23 from the filter unit 20.
By replacing the filter material 23 cut out to a predetermined size from a sheet-like filter material having a larger diameter,
The action of the filter device 1 for removing oily smoke and the like can be restored at low cost.

The filter frame 21 is provided with a first frame at the inner edge of a flat frame to prevent the filter material 23 from shifting forward.
A supporting portion 24 is formed, and a concave groove-shaped engaging portion 25 is formed at upper and lower portions on the exhaust side of the filter frame portion 21. In addition, the filter frame portion 21 forms the outer shape of the filter unit 20, and the outer shape may be suitable for the structure of the mounting portion 17 of the outer frame unit 10. The shape of the filter frame 21 in the frame is not limited as long as it does not prevent the air from being sucked through the circular hole 14 of the outer frame unit 20. The filter frame 21 may have a rectangular shape as shown in FIG. However, it can be changed as appropriate.

The filter support member 22 is provided on the filter frame 2
The filter member 23 has a plurality of protrusions 26 that engage with the locking portions 25 of the filter frame portion 21, as shown in FIG. 3
The second support portion 27 is formed in the frame so as not to be sucked into the device. Also, the filter support member 2
2 is only required to be able to securely fix the filter material 23 to the filter frame portion 21 and to be able to easily replace the filter material 23, and as shown in FIG. 3, manufactured separately from the filter frame portion 21. Although not shown, it may be formed integrally with the filter frame 21 although not shown.

The material of the filter material 23 may be a special fiber having a property of adsorbing oil and dust in the air, or washing off dirt adhering to the filter material 23,
A material that can restore the effect of adsorbing oily smoke or the like may be used, or a cloth such as clothing that is no longer needed may be used, and may be appropriately selected according to the use atmosphere of the filter device 1. Further, by using a sheet-like filter material having a size that can be cut into a predetermined size by an operator, the filter material 23 can be applied regardless of the size of the ventilation fan 30.

In this embodiment, the dimensions of the filter unit 20 are such that the vertical dimension is such that the filter unit 20 can be mounted on the above-described mounting section 12, and the width is substantially the same as the horizontal inner dimension of the mounting section 17 of the outer frame unit 10. Any size is acceptable. Further, the filter unit 20 is not limited to the one made of the above-mentioned separable constituent members, and the filter material 23 is
It may be a disposable thing which is formed in advance in one piece. That is, the filter unit 20 is provided with a filter material 23 that can adsorb dirt such as oil smoke that is about to be sucked into the ventilation fan 30, and if the outer shape is detachable to the mounting portion 17 of the outer frame unit 10, the outer frame unit 10 Applicable to The frame 11, the filter frame 21, and the filter support member 22 of the outer frame unit 10 are made of an elastic material such as metal or synthetic resin in order to improve the appearance, improve the strength, and simplify the manufacturing process. It is desirable that they are formed integrally.

As another form of the above-described outer frame unit 10, an outer frame unit 10 'shown in FIG. 4 can be considered. The outer frame unit 10 'is provided with a second side wall 18 from the outer edge of the frame 11 toward the exhaust side. This second
The side wall portion 18 is for allowing the outer frame unit 10 ′ to cover not only the front surface of the casing 33 but also the side edges. It is preferable that the length of the second side wall portion 18 is such that the front end thereof comes into contact with the inner wall 34 of the building, but depending on the thickness from the wall 34 of the casing 33, the front end of the cylindrical portion 16 may be used. May not come into contact with the conical hole 38b. Therefore, it is preferable that one of the cylindrical portion 16 and the second side wall portion 18 is formed in a bellows shape so as to be expandable and contractible. Further, by providing the second side wall portion 18, when the outer frame unit 10 'is mounted on the casing 33, it is possible to prevent the outer frame unit 10' from sliding vertically and horizontally. That is, an appropriate pedestal member (not shown) is provided in a gap formed between the upper inner wall of the second side wall 18 and the upper edge of the casing 33, and the gap is kept constant. The mounting position of the outer frame unit 10 'can be reliably fixed. In FIG. 4, a detailed description of a portion overlapping the outer frame unit 10 (FIGS. 1 and 2) is omitted.

[0028]

When the filter device according to the present invention is mounted on a ventilation fan, since the cylindrical portion of the outer frame unit and the conical portion of the casing of the ventilation fan are air-tightly communicated by the sealing member, the exhaust air is exhausted from the cylindrical portion. After passing through the filter unit 20 installed near the end on the intake side of the unit, the air is sucked into the ventilation fan, and the oil and dust in the air can be reliably removed by the filter unit. The filter unit is detachably formed in the outer frame unit, and the action of removing oily smoke and the like in the air can be easily restored by replacing only the filter unit or a filter material that can be separated from the filter unit. In particular, in the case of a filter material that can be separated from the filter unit, the action of removing oily smoke and the like in the air can be restored at low cost. Further, since the fixing member is provided at the distal end portion or the inner peripheral portion of the cylindrical portion through which the air from which the oily smoke or the like has been removed passes, the oily smoke or the like does not adhere and is not noticeable from the appearance of the filter device. The outer frame unit can be attached to the casing without disturbing the appearance of the filter device because it is installed at the site.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a state in which a filter device according to the present invention is attached to a ventilation fan.

FIGS. 2A and 2B are perspective views showing an outer frame unit, wherein FIG. 2A is a view as viewed from an intake side, and FIG. 2B is a view as viewed from an exhaust side.

FIGS. 3A and 3B are perspective views of the filter unit as viewed from the exhaust side, where FIG. 3A shows a state where constituent members of the filter unit are separated, and FIG. 3B shows a state where the filter unit is assembled.

FIGS. 4A and 4B are perspective views showing an outer frame unit provided with a second side wall portion, wherein FIG. 4A is a view as viewed from an intake side, and FIG. 4B is a view as viewed from an exhaust side.

FIG. 5 is a longitudinal sectional view showing a ventilation fan to which the filter device according to the present invention is applied.

[Explanation of symbols]

 (1) Filter device (10) Outer frame unit (11) Frame body (12) Seal member (13) Fixing member (14) Circular hole (15) Flat plate part (16) Tube part (17) Mounting part (18) 2 Side wall portion (20) Filter unit (21) Filter frame portion (22) Filter support member (23) Filter material (24) First support portion (25) Locking portion (26) Projection portion (27) Second support portion (30) Ventilation fan (31) Rotating feather (33) Casing (34) Wall of building (38) Vent

Claims (3)

[Claims] An apparatus comprising an outer frame unit attached to a casing of a direct-attachment type ventilation fan and a filter unit for removing oil and dust in the air, wherein the filter unit is detachable from the outer frame unit. The outer frame unit forms a circular hole communicating with the circular hole and a vent formed on the inner peripheral side of the casing at a substantially central portion of the flat plate portion, and toward the intake side of the vent of the casing. A cylindrical portion that conforms to the conical portion whose diameter is gradually increased is extended from the inner peripheral portion of the circular hole of the flat plate portion toward the exhaust side, and a mounting portion for detachably attaching the filter unit is provided on the intake side of the flat plate portion. , A sealing member for hermetically sealing a gap between the cylindrical portion and the conical portion of the casing, and a fixing member for attaching the frame to the casing. Ventilation fan Filter device. 2. The filter unit according to claim 1, wherein the filter unit includes a filter frame detachable from a mounting portion of the outer frame unit, a filter material,
The filter device for a ventilation fan according to claim 1, further comprising a filter support member for fixing the filter material to a filter frame portion. 3. The fixing member according to claim 1, wherein a distal end portion is formed in a hook shape, a body portion is formed of a telescopic member, and a base end portion is connected to a distal end or an inner peripheral portion of the cylindrical portion. Claim 1
Or the ventilation fan filter device according to 2.