Soot particle collecting filter material and ventilation fan filter using the material

Description: TECHNICAL FIELD [Detailed description of the invention]

【0001】

[Technical field to which the invention belongs]

The present invention relates to an improvement of a filter material and a ventilation fan filter used for collecting oil smoke particles by discharging them into oil smoke generated during cooking.

【0002】

[Conventional technology]

Generally, as a filter material for a ventilation fan or a range hood that emits oily smoke, a non-woven fabric sheet made of glass fiber or a flame-retardant synthetic fiber (polyclar fiber, modacryl fiber, etc.) is used as a flame-retardant synthetic resin (vinyl chloride resin, vinylidene chloride resin). Etc.), and a non-woven fabric sheet bonded by is used. Since this type of non-woven fabric filter has good collection efficiency of oil smoke particles, it has an advantage that the number of times of cleaning the ventilation fan body and the range hood is reduced.

【0003】

However, in the conventional non-woven fabric filter, the collected oil smoke particles cause clogging, increase the ventilation resistance, and reduce the oil smoke discharge effect in a relatively short period of time. Therefore, the filter must be replaced frequently. , This replacement work was troublesome.

【0004】

[Problems to be Solved by the Invention]

The present invention prevents clogging by decomposing and removing the collected oil smoke particles into water and carbon dioxide by photocatalytic action, enables stable collection of oil smoke particles, and allows a filter replacement cycle. The challenge is to extend it significantly and eliminate frequent replacement work.

【0005】

[Means for solving problems]

The present invention has focused on a photocatalyst in order to solve the above problems. However, when titanium oxide particles are attached to a non-woven fabric sheet made of synthetic fibers with a binder resin as a photocatalyst, the photocatalytic action of titanium oxide causes the present invention. Synthetic fibers and binder resins constituting the non-woven fabric sheet are oxidatively decomposed, do not exhibit the function as a filter, and finally the form is not maintained.

【0006】

Therefore, in the filter material for collecting oil smoke particles according to the present invention, the fiber surface (including the fiber intersections) constituting the non-woven fabric sheet is covered with a make coat layer of a binder resin, and the make coat layer is porous with oil absorption. The photocatalyst particles are dispersedly adhered to the binder resin so that a part of the surface thereof is exposed.

【0007】

In the present invention, the porous photocatalyst particles are metal oxides (silica, alumina, etc.), alkaline earth metal silicates (calcium silicate, cobalt oxide, etc.), etc., with titanium oxide (preferably anatase-type titanium oxide) as the core. It is coated with an oil-absorbing porous microcapsule wall made of the above inorganic substances.

【0008】

According to this means, the surfaces and intersections of the constituent fibers of the non-woven sheet are covered with the make-coat layer, and the porous photocatalyst is partially exposed and adhered to the make-coat layer in a dispersed manner. The oil smoke particles collected in the above penetrate into the inside through the pores of the porous microcapsule wall constituting the outer shell of the porous photocatalyst and come into contact with titanium oxide. It is decomposed into.

【0009】

In the present invention, it is preferable to attach 40 to 100 parts by weight of a mixed binder to which 40 to 300 parts by weight of a porous photocatalyst is added to 100 parts by weight of the binder resin with respect to 100 parts by weight of the nonwoven fabric sheet. This is because the oxidative decomposition action of the oil smoke particles by the porous photocatalyst becomes even more effective.

【0010】

By the way, if the amount of the porous photocatalyst added to the mixed binder is less than 40 parts by weight with respect to 100 parts by weight of the binder resin, the effect of the porous photocatalyst is not sufficiently exhibited, and if it exceeds 300 parts by weight, The porous catalyst is likely to fall off during transportation, mounting, etc., and a more preferable range is 100 to 240 parts by weight.

【0011】

Further, when the amount of the mixed binder adhered to less than 40 parts by weight with respect to 100 parts by weight of the non-woven fabric sheet, a portion lacking the make coat layer was generated on the surface of the constituent fibers, and a portion where the porous photocatalyst body did not exist was partially present. If it is scattered and the oxidative decomposition action becomes insufficient and exceeds 100 parts by weight, the make coat layer on the surface of the constituent fibers is only thickened, and the oxidative decomposition action is not increased, which is a more preferable range. It is 60 to 80 parts by weight.

【0012】

The filter material for collecting oil smoke particles of the present invention can be used as a ventilation fan filter or a filter for a range hood by punching or cutting to a predetermined size, but a molding frame made of a flame-retardant resin is provided on the periphery. Therefore, a ventilation fan filter that can be easily replaced is formed.

【0013】

BEST MODE FOR CARRYING OUT THE INVENTION

Next, an embodiment of the filter material according to the present invention will be described with reference to the drawings.

【0014】

FIG. 1 is a schematic cross-sectional view of the filter material of the present invention. A make coat layer 2 of a binder resin is formed on the surface and intersections of the constituent fibers 1 of the nonwoven fabric sheet constituting the filter material, and the make coat layer 2 is formed. A large number of porous photocatalysts 3 are attached to 2 in a dispersed manner with a part of the surface exposed.

【0015】

The porous photocatalyst 3 has titanium oxide 3a as a core and is coated with a porous microcapsule wall 3b made of silica whose particle size range (μ), oil absorption rate (ml / g) and the like are adjusted.

【0016】

In this case, the constituent fiber 1 is not particularly limited, and synthetic fibers such as polyester-based, polyacrylic ritril-based and polyvinyl chloride-based, and flame-retardant synthetic fibers such as polyclar fiber and modacryl fiber, etc. Inorganic fibers such as glass fibers and rock wool fibers, single or mixed fibers selected from carbon fibers and the like are used, but flame-retardant fibers are preferable in order to prevent combustion.

【0017】

The binder resin may be any resin used as a binder for non-woven fabrics, for example, a polyacrylic acid ester, a copolymer of vinyl acetate and an acrylic monomer, a vinyl chloride copolymer, and polyvinyl chloride. Examples thereof include vinyl, ethylene-vinyl chloride copolymer, polyvinylidene chloride and the like, and those suitable for the constituent fibers of the non-woven sheet may be selected and used. Among these binder resins, an emulsion-based resin in which polymer particles are dispersed in water can be preferably used.

【0018】

By the way, in the filter material for collecting oil smoke particles of the present invention, a mixed binder obtained by adding a porous photocatalyst to the binder resin is immersed in a non-woven fabric formed in the form of a sheet having a predetermined thickness in the same manner as the binder of the non-woven fabric. It can be produced by coating with coating, spraying or the like and then drying.

【0019】

The above non-woven fabric sheet has a basis weight of 10 to 200 g / m as a filter material for ventilation fans and microwave ovens.², More preferably 20-100g / m²When used in the range of, it is suitable for collecting oil smoke particles and dust and for pressure loss.

【0020】

FIG. 2 shows an embodiment in which the filter material according to the present invention is applied to a ventilation fan filter. F is a ventilation fan filter, and this ventilation fan filter F is a filter obtained by punching or cutting a filter material made of a non-woven fabric sheet to a predetermined size. A molding frame B made of flame-retardant resin is attached around the main body A.

【0021】

Similar to the conventional ventilation fan filter, the ventilation fan filter F of the present invention is attached close to the lower part of the ventilation fan S arranged above the range R as shown in FIG. It is sucked in through the ventilation fan filter F and discharged to the outside of the room. The ventilation fan filter F is capable of oxidatively decomposing the collected oil smoke particles by the photocatalytic action of titanium oxide of the porous photocatalyst 3 fixed to the constituent fibers.

【0022】

By the way, the titanium oxide exerts a photocatalytic action even by the light of a normal fluorescent lamp, but if the black lamp L having a wavelength of 350 nm is arranged close to the mounting position of the ventilation fan filter F, the photocatalytic action is further enhanced. Can be active.

【0023】

[Example]

Next, examples of the present invention will be described, but the present invention is not limited to these examples.

【0024】

A mixed fiber of polyester fiber 15d x 51mm 70% and polyacrylonitrile fiber 6d x 51mm 30% is mixed with a card machine and the fiber weight is 40g / m.²The number of punches is 50p / m with a needle punching machine.², A non-woven fabric sheet with a thickness of 3 mm was produced by processing to a driving depth of 13 mm.

【0025】

Next, the non-woven fabric sheet is mixed with the following compounding conditions at 15 g / m on one side.²After spraying one by one, dry and filter material (weight: 70 g / m)², Thickness: 3 mm) was prepared.

【0026】

Formulation conditions Mixed resin liquid solid ratio (part by weight) Ethylene / PVC resin 100 parts Porous photocatalyst (porous silica with titanium oxide as the core) Mikle Capsule) 100 copies Cross-linking agent (melamine resin) 10 parts 1 part of catalyst Concentration 20% Adhesion amount A side: 15g / m², B side: 15g / m² 【0027】

Next, in order to punch out the filter material into a predetermined shape and facilitate replacement, a ventilation fan filter resin-molded with a flame-retardant resin was produced.

【0028】

[Effect of the invention]

According to the present invention, the collected oil smoke particles infiltrate the inside through the pores of the porous photocatalyst and come into contact with titanium oxide, and are decomposed into water and carbon dioxide by the photocatalytic action of titanium oxide and removed. Therefore, the problems of the conventional technology such as clogging and oil dropping due to the adhesion of dust to the oil smoke particles are solved, frequent replacement work becomes unnecessary, and the replacement cycle can be significantly extended. it can. In addition, since the state in which oil smoke particles do not exist on the surface of the constituent fibers and between the fibers is maintained, the oil smoke particles can be stably collected for a long period of time, and the generation of foul odors can be prevented, which is excellent in terms of hygiene. Play.

[Simple explanation of drawings]

[Figure 1]

Embodiments of the present invention are shown, (a) is a partially broken schematic diagram of a filter material, and (b) is a schematic diagram of a main part.

[Figure 2]

It is the schematic explanatory drawing of the ventilation fan filter which shows the other embodiment of this invention.

[Fig. 3]

It is explanatory drawing which shows the use state of the ventilation fan filter which shows embodiment of this invention.

[Explanation of symbols]

1 Constituent fiber 2 Makeup coat layer 3 ... Porous photocatalyst 3a ... Titanium oxide 3b ... Porous microcapsule wall A Filter body B Molded frame F Ventilation fan filter L Black lamp R Range S Ventilation fan