JP2802199B2 - Ventilation filter - Google Patents

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 device used for a ventilation fan mainly used at home.

[0002]

2. Description of the Related Art In recent years, interest and demand for ventilation have been increasing, and the spread of ventilation devices has been remarkable. And in ventilator used in place of occurrence of smoke, such as kitchen, oily smoke has become mainstream those filters instrumentation wearing shaped for preventing instrument soiling by, ventilator filter used in these Demand is increasing.

Conventionally, this type of ventilator filter is generally configured as shown in FIGS. That is, the fiber 100 such as a polyester material is knitted to a substantially uniform roughness, and the fibers 100 are combined with each other by a mounting agent 1 such as a binder.
01, the filter 102 formed into a nonwoven fabric is formed into a shape that covers the suction port 103A of the ventilation device,
In addition, a filter 105 for a ventilator is formed by forming an outer periphery of the filter 102 or, if necessary, a lattice-like filter frame 104 by insert molding or the like.

A filter 105 for a ventilator constructed as described above is mounted in front of a suction port 103A of a ventilation fan 103 installed in a kitchen or the like, and air contaminated with oil smoke generated during cooking is removed by the ventilation fan 103. At the time of discharge, the oil droplets 106 in the air are collected by the filter 102 to prevent the ventilation fan 103 from being stained with oil smoke.

[0005]

[Problems that the Invention is to Solve In such a conventional ventilation apparatus filter 105, since the filter 102 is Aru woven substantially uniform roughness fibers 100, such as a polyester material, generally somewhat closely distribution Oil drops 106
Is collected on the front side of the filter 102, and as the collection continues, the large capillary filter 10
Before the oil accumulates in the inside of the filter 2, the oil accumulates on the front surface of the filter 102 having a small capillary phenomenon, gradually grows into a large oil droplet 106 </ b> A, and flows down along the front surface of the filter 102. Oil cannot be stored in the whole, and the filter 1 for the ventilator
There was a problem that oil flowed out of the 05.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and it is possible to replace a filter for a ventilation device as much as possible or to clean a ventilation device by collecting oil in the entire filter without lowering the oil collecting efficiency of the filter. A first object is to provide a ventilator filter that can be lengthened.

A second object is to easily construct a filter for a ventilator which achieves the first object.

A third object is to enable a user to easily determine the limit of use of the ventilation device filter.

[0009]

A first means for achieving the first object of the present invention is that a first nonwoven fabric in which first fibers are roughly arranged and a second nonwoven fabric in which second fibers are arranged densely. The second nonwoven fabric,
The first nonwoven fabric is formed integrally with the front surface side, and the second nonwoven fabric is formed integrally with the rear surface side, and the density of the first nonwoven fabric is set such that when oil smoke generated during cooking has a surface wind speed of approximately 2 m / sec,
Pressure at which most of the smoke in oil smoke can pass through without accumulating on the front side
And the density of the second nonwoven fabric is defined as
When the oil smoke has a surface wind velocity of about 2 m / sec, the density is such that the oil droplets have a pressure loss at which inertial collision can occur near the front surface thereof.

A second means for achieving the second object is that the diameter of the first fiber is larger than the diameter of the second fiber.

A third means for attaining the third object is that the first nonwoven fabric has a light color and the second nonwoven fabric has a dark color.
Different fibers or lighten the color of each nonwoven fabric itself
The first nonwoven fabric is formed in a darker color, and the color of the first nonwoven fabric is lighter than that of the second nonwoven fabric.

[0012]

According to the first aspect of the present invention, when oil smoke generated during cooking passes through a filter for a ventilation device, oil droplets in the oil smoke pass through a first non-woven fabric having coarsely arranged fibers. easy, front to hardly accumulate oil droplets ventilator filter, oil droplets the majority having passed through the first nonwoven, and inertial impaction in front of the second non-woven fabric densely arranged fibers, a large capillarity Oil accumulates inside the ventilator filter, so that it is possible to prevent oil from flowing down in a short period of time.

Further, according to the structure of the second means, the wire diameter of the first fibers arranged roughly is made thicker than that of the second fibers arranged densely. And also densely distributed
The smaller the diameter of the second fiber to be processed, the easier it is to process, coarse and dense.
It can be easily processed into each state, and the whole filter for the ventilation device can be easily constituted.

Further, according to the configuration of the third means, since the color of the first non-woven fabric is lighter than that of the second non-woven fabric, even if oil droplets and dust are collected in the filter for the ventilation device, they are not sufficiently collected. Before that, the user can visually check the color of the second nonwoven fabric through the first nonwoven fabric that has been roughly processed . Then, while collecting the oil droplets and dust with the ventilation device filter for a long time, the oil droplets and dust accumulate inside the ventilation device filter, that is, near the rear surface of the first nonwoven fabric, and the use limit is approached. Since the color of the second nonwoven fabric cannot be confirmed through the first nonwoven fabric and the first nonwoven fabric, the user can determine the use limit (lifetime) of the filter for a ventilation device.

[0015]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG.

As shown in the drawing, the filter 1 coarsely converts a first fiber 2 such as a polyester material having a large wire diameter (20 denier) to a pressure loss of about 2 Pa when air having a wind speed of 2 m / sec passes. The knitted first nonwoven fabric 3 and the thin wire diameter (1
0 denier) A second nonwoven fabric 5 obtained by knitting a second fiber 4 such as a polyester material densely (a pressure loss when air having a wind velocity of 2 m / sec passes through is about 4 Pa) and a first nonwoven fabric 3
With the second nonwoven fabric 5 on the front surface 6 side and the second non-woven fabric 5 on the rear surface 7 side, and are integrally formed by bonding to each other with an adhesive 8 such as a binder. In addition, the first fibers 2 or the second fibers 4
They are bonded together with an adhesive 8.

[0017] The ventilation fan filter 1 is instrumentation wearing 9
Into the outer frame 11 or, if necessary, the lattice-shaped filter frame 11 to form a filter 12 for a ventilation device.

The filter 12 for a ventilator constructed as described above is connected to the suction port 10 of a ventilation fan 9 installed in a kitchen or the like.
A description will be given below of how the ventilation device filter 12 collects oil smoke when exhausting air contaminated with oil smoke or the like generated at the time of cooking.

By operating the ventilation fan 9, the air contaminated with oil smoke or the like generated during cooking is sucked from the front face 6 side of the ventilator filter 12 and passes through the first nonwoven fabric 3 of the filter 1. At this time, the first nonwoven fabric 3
Since the fibers 2 are coarsely knitted so as to cause the above-mentioned pressure loss , the oil droplets 13 in the air relatively hardly cause inertial collision with the first fibers 2 and most of them pass through the second nonwoven fabric 5. To reach. Then, the second non-woven fabric 5 enters the second non-woven fabric 5. Since the second non-woven fabric 5 is densely knitted by the second fibers 4 so as to have the above-described pressure loss , most of the oil droplets 13 are formed in the second non-woven fabric 5. The first non-woven fabric 3 and the second non-woven fabric 5
, Ie, inside the filter 1. The air from which the oil droplets 13 have been removed is discharged from the ventilation fan 9 to the outside of the room.

[0020] continuous introduction of further collecting the oil droplets 13 in the filter 1, the oil reservoir to the interior of the filter 1, to grow gradually into large droplets 13A, tries to flow down to the lower hair <br/> Due to the pipe phenomenon, the first non-woven fabric 3 collects from the rear side to the front side.
As a result, the amount of water flowing down is reduced, and further , the water is prevented from dripping downward from the filter 1.

When the oil droplets 13 are further collected,
Eventually, the oil droplets 13A begin to drip below the filter 1. The timing at which the oil droplets begin to drip and the amount of the drip are shown in FIG. 3 in comparison with a conventional filter for a ventilation device. The time at which the oil droplets 13A begin to drop is about twice as large as that of the conventional one, and the amount of dripping is greatly reduced.

Also, since the first nonwoven fabric 3 is roughly knitted with the first fibers 2, the collected oil droplets 13 are not flat but pass through the air, that is, the first nonwoven fabric 3 Because it is easy to disperse in the front-rear direction, it has the feature that the pressure loss does not increase much even after the use period elapses, and FIG. 4 shows data obtained by comparing this with a conventional filter for a ventilation device. This will be described below.

In the figure, the vertical axis represents the ventilation air volume which is inversely proportional to the pressure loss, and the horizontal axis represents the filter 1 having a correlation with the use period.
The amount of oil adhering to the filter is shown in the figure. As can be seen from the figure, the ventilation air filter according to the present invention has a reduced ventilation air volume even when the oil adhesion amount is increased, as compared with the conventional ventilator filter. It can be seen that the ventilation air volume is the same even if the amount of adhesion is about 1.5 to 1.7 times that of the conventional case.

The first fiber 2 has a wire diameter of the second fiber 4
The first nonwoven fabric 3 is roughly processed because it is thicker than
Also, the stiffness becomes stronger than the second nonwoven fabric 5, and the predetermined shape is obtained.
The second nonwoven fabric 5 which can be easily obtained and knit tightly
Is easier to process if the wire diameter is smaller,
It can be easily processed to a dense state.

Further , the first non-woven fabric 3 is formed of a second fiber 4.
Since the thick first fibers 2 are arranged, a predetermined pressure loss
In order to achieve
It is necessary to make it large and coarse,
Since the holding amount of the wire has increased and the wire diameter has been increased,
Even if a large amount of oil droplets are accumulated, the shape of the oil droplets is not easily broken.

As described above, according to the filter 12 for a ventilator of the first embodiment of the present invention, the oil droplets 13 in the oil smoke are retained in the filter 1 without lowering the oil collecting efficiency of the filter 1. To delay the time of dropping of oil droplets 13
In addition, the amount of dripping can be reduced, and even if the oil droplets 13 are held in a large amount, a decrease in the ventilation air volume can be reduced.

Further , the filter 1 can be easily and reliably manufactured, and the amount of oil droplets retained can be reduced.
Can be increased without destroying the shape of the tab.

In this embodiment, the first non-woven fabric 3 is the first non-woven fabric.
By the fibers 2, the pressure loss when the air with a wind speed of 2 m / sec passes is set to about 2 Pa, and the air with a wind speed of 2 m / sec passes through the second nonwoven fabric 5 with the second fibers 4. The filter 1 was constructed by knitting in a dense state in which the pressure loss at the time was about 4 Pa. It is changed about density of 1 nonwovens 3 and the second nonwoven fabric 5, a first non-woven fabric 3 oil droplets
If the second nonwoven fabric 5 is made coarse enough not to collect on the front surface side and dense enough to cause the oil droplets to have an inertial collision near the front surface, there will be a large difference in the operation effect. Absent.

Next, a second embodiment of the present invention will be described with reference to FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in the figure, the present embodiment differs from the first embodiment in that the second nonwoven fabric 5 is mixed with dark-colored fibers 50 (for example, blue fibers) and the first nonwoven fabric 3 is lightly colored. The color fiber 51 is mixed. As a result, the color of the filter 1 as viewed from the front as a whole passes through the first nonwoven fabric 3 which is coarsely arranged.
As a result, the dark-colored fibers of the second nonwoven fabric 5 stand out.
The contaminated air in the room is caused by oil droplets 13 generated during cooking.
And the dust 52, which is captured by the filter 1. At this time, since the dust 52 is often relatively large, the dust 52 is trapped near the surface of the first nonwoven fabric 3, and the oil droplets 13 are trapped largely at the boundary between the first nonwoven fabric 3 and the second nonwoven fabric 5. As a result, the dust 52 and the oil droplets 13 are captured so as to cover the second nonwoven fabric 5, so that the dark color of the second nonwoven fabric 5 becomes inconspicuous. That is, the second nonwoven fabric 5
Is covered by the dust 52 and the oil droplets 13, which is the life of the filter 1, and the change in color of the filter 1 as a whole informs the user of the life.

As described above, according to the ventilator filter 12 of the second embodiment of the present invention, the dark color fibers 50 mixed into the second non-woven fabric 5 by the oil droplets 13 and the dust 52 adhered to the filter 1. Becomes inconspicuous, the user is informed of the service life, and the service life can be easily determined.

In this embodiment, the color of the first nonwoven fabric 3 is changed to the second color by mixing the dark fiber 50 into the second nonwoven fabric 5 and the light fiber 51 into the first nonwoven fabric 3. 2
The color of the first fiber 2 itself used for the first nonwoven fabric 3 is lighter than the color of the second fiber 4 itself used for the second nonwoven fabric 5. Even if the filter 1 is configured by the above, there is no difference in the operation and effect.

[0033]

As is apparent from the above embodiments, according to the present invention, oil droplets generated during cooking are captured and held inside the filter without lowering the oil collecting efficiency of the filter.
By preventing the oil droplets from flowing down from the front of the filter due to the growth of oil droplets, it is possible to replace the filter alone or significantly increase the time to clean the ventilation device,
Even if a large amount of oil is retained in the filter, it is possible to provide a ventilator filter that reduces a decrease in ventilation air volume.

Further, since the wire diameter of the first fiber is thicker than the wire diameter of the second fiber, the crude a first nonwoven, easily be knit a second nonwoven dense, and it is possible to reliably , That
It is possible to increase the amount of oil droplets retained without breaking the shape of the
Can be.

Further, by making the color of the first nonwoven fabric lighter than the color of the second nonwoven fabric, the user can easily judge the life of the filter, and the replacement can make full use of the performance of the ventilator. be able to.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of a filter for a ventilation device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a ventilator filter according to the first embodiment.

FIG. 3 is a characteristic diagram comparing the amount of oil dripping from the filter with respect to the service period of the ventilator filter of the first embodiment and the conventional ventilator filter.

FIG. 4 is a characteristic diagram comparing a change in ventilation air volume with respect to an oil adhesion amount between the ventilator filter of the first embodiment and the conventional ventilator filter.

FIG. 5 is an enlarged sectional view of a main part of the ventilator filter according to the second embodiment.

FIG. 6 is an enlarged sectional view of a main part of a conventional filter for a ventilation device.

FIG. 7 is a perspective view of the ventilator filter.

[Explanation of symbols]

 2 1st fiber 3 1st nonwoven fabric 4 2nd fiber 5 2nd nonwoven fabric 12 Filter for ventilators

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B01D 46/00-46/54 B01D 39/16 F24F 7/013

Claims (3)

(57) [Claims] 1. A first non-woven fabric in which first fibers are coarsely arranged and a second non-woven fabric in which second fibers are densely arranged, the first non-woven fabric is arranged on the front side, and the second non-woven fabric is arranged on the front side. The pressure loss is such that the first nonwoven fabric is integrally formed on the rear surface side, and the density of the first nonwoven fabric is such that most of the oily smoke in the oily smoke can pass through without being collected on the front side when the oily smoke generated during cooking is approximately 2 m / sec in wind velocity. Becomes
The density of the second non-woven fabric is approximately equal to the density of the oil smoke.
A filter for a ventilator , wherein the density of the oil droplets is such that the oil droplets have a pressure loss that can cause an inertial collision near the front surface when the wind speed is 2 m / sec . 2. The filter according to claim 1, wherein the diameter of the first fiber is larger than the diameter of the second fiber. 3. The first nonwoven fabric has a light color, and the second nonwoven fabric has a dark color.
Mixing fibers of different colors, or of each nonwoven fabric itself
The filter for a ventilation device according to claim 1 or 2 , wherein the color is formed into a light color and a dark color, and the color of the first nonwoven fabric is made lighter than the color of the second nonwoven fabric.