JP2011045884A - Pre and main integrated air filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pre and main integrated air filter which exchanges or cleans a pre filter and a main filter at the same time. <P>SOLUTION: The pre and main integrated air filter includes: a frame body 10 which penetrates a front side and a rear side and also has openings over the whole surface of the front side and the rear side; the pre filter 12 which is structured by bending a sheet like filter material 18 alternately in the shape of a pleat and is arranged at an opening 10A in the front side of the frame body 10; and the main filter 14 which is structured by bending a sheet like filter material 22, 24 alternately in the shape of a pleat and is arranged at an opening 10B in the rear side of the frame body 10, wherein the main filter 14 is formed as to collect smaller particles than the pre filter 12 and the pre filter 12 has the sheet like filter material of larger surface area than the main filter 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pre-main integrated air filter capable of collecting dust and dirt from outside air by being attached to air conditioning equipment such as an office building or a condominium.

  Conventionally, an air filter has been attached to an air conditioning facility such as an office building or a condominium, and external air dust or dust is collected by the air filter (Patent Document 1). Conventional air filters usually have a pre-filter capable of collecting relatively large particles such as dust and dust, for example, particles of 5 μm or more, and relatively small particles such as car exhaust gas and cigarette smoke, for example 0.3 μm. Two types of main filters capable of collecting the above particles are used, and these are provided separately.

JP 2001-170423 A

  However, the pre-filter must be replaced once every one or two months in normal use, and it must be replaced in a shorter period of time than the main filter which only needs to be replaced once a year. For this reason, since the respective replacement times are different, the maintenance of these two types of filters is not easy, and it is difficult to integrate the two types of filters. In particular, in recent years, used air fills have been reused by washing. However, if separate filters are washed at different times, there is a problem that maintenance efficiency is not good.

  Accordingly, an object of the present invention is to provide a pre-main integrated air filter in which the pre-filter and the main filter can be replaced or cleaned at the same time.

  In order to achieve the above-mentioned object, the present invention penetrates the front surface and the back surface and alternately folds the frame body having an opening over the entire surface of the front surface and the back surface and the sheet-like filter material into a pleat shape. The pre-filter provided in the opening on the front side of the frame body and the sheet-like filter material are alternately folded in a pleat shape, and provided in the opening on the back side of the frame body. A main filter, wherein the main filter is formed so as to collect finer particles than the pre-filter, and the pre-filter has a larger surface area of the sheet-like filter material than the main filter. Is a pre-main integrated air filter.

  As described above, according to the pre-main integrated air filter according to the present invention, by increasing the surface area of the sheet-like filter material of the pre-filter, the service life of the pre-filter is increased, Since the pre-filter and the main filter can be exchanged and washed, even if two types of filters having different collectable particles are used, they can be integrated. If it is not possible to extend the service life of the prefilter, even if the prefilter and the main filter are integrated, it is necessary to replace the integrated air filter even if it is time to replace the prefilter. Although it must be replaced, it is possible to simultaneously replace and clean the prefilter and the main filter by extending the service life of the prefilter as in the air filter according to the present invention.

  In the pre-main integrated air filter according to the present invention, the pre-filter may be arranged so that an area facing the front side of the frame body is wider than the main filter, and the front and rear of the pre-filter The thickness in the direction may be greater than that of the main filter, and both the pre-filter and the main filter may be arranged in parallel to the opening of the frame. By comprising in this way, the surface area of the sheet-like filter material of a pre filter can be made larger than a main filter. Furthermore, it is preferable that all of the frame body, the pre-filter, and the main filter are made of synthetic resin. In this way, by constituting from any of the synthetic resins, it is possible to recycle including washing and reusing them.

  Furthermore, in the pre-main integrated air filter according to the present invention, the pre-filter and the main filter apply hot melt continuously to the sheet-like filter material in the width direction at equal intervals in the vertical direction. After that, it is preferable that a plurality of folds are alternately bent, and thus the hot melt is continuously applied in the width direction of the sheet-like filter material, and the filter is bent. Since a sufficient gap can also be maintained on the valley side, the filter can be easily cleaned without causing the valleys of the filter to converge and the sheets to be attracted when flowing the cleaning water.

  As described above, according to the present invention, it is possible to provide an integrated air filter capable of simultaneously replacing the prefilter and the main filter.

It is a rear view of the Example of the pre main integrated air filter which concerns on this invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. It is a side view of the filter block which comprises the pre filter of the pre-main integrated air filter which concerns on a present Example. It is a partial front view of the filter block which comprises the pre filter of the pre-main integrated air filter which concerns on a present Example. FIG. 5 is a partial cross-sectional view taken along line VI-VI in FIG. 4. It is a side view of the main filter of the pre-main integrated air filter which concerns on a present Example. It is a front view of the main filter of the pre-main integrated type air filter concerning this example. FIG. 8 is a cutaway sectional view taken along line IX-IX in FIG. 7. It is a figure corresponding to FIG. 2 of the other aspect of the pre main integrated air filter which concerns on this invention.

  1 is a rear view of an embodiment of a pre-main integrated air filter according to the present invention, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. It is sectional drawing along the III-III line. The air filter according to the present embodiment penetrates the front side and the back side and is opened over the entire surface, the prefilter 12 provided in the opening 10A on the front side of the frame 10, and the frame And a main filter 14 provided in the opening 10B on the back side of the body 10.

  As shown in FIG. 2, the pre-filter 12 is composed of twelve filter blocks 16 formed in a rectangular parallelepiped shape, and each of these filter blocks 16 has a pair of C shapes, that is, adjacent ones. Are arranged in the frame 10 so as to be inclined to the opposite sides. These filter blocks 16 are formed from a single sheet-like filter material 18 as follows. That is, first, hot melt 20 is continuously applied in the width direction at equal intervals in the vertical direction on both surfaces of a sheet-like filter material 18, and pleats having the same width before the hot melt 20 is solidified. One block body is formed by bending a plurality of layers alternately. A side view of this block body is shown in FIG. 4, a partial front view is shown in FIG. 5, and a partial cross-sectional view along the line VI-VI in FIG. 4 is shown in FIG. Twelve filter blocks 16 having continuous edges in the width direction can be obtained by bending the one block body at eleven locations at equal intervals in the width direction. The hot melt 20 is applied up to the valley of the folded filter material 18, so that a gap can also be maintained on the valley side of the filter block 16. The filter material 18 is made of, for example, a synthetic fiber such as polypropylene fiber, and is configured to collect almost 90% of permeated particles of 5 μm or more.

  The main filter 14 is provided over the entire back surface of the frame 10 as shown in FIGS. As shown in FIGS. 7 to 9, the main filter 14 is formed by alternately bending a plurality of sheet-like filter materials 22 and 24 into a pleat with the same width in an overlapped state. The hot melt 26 is continuously applied in the width direction at equal intervals in the vertical direction on both surfaces of the superimposed filter materials 22 and 24, and a plurality of them are alternately bent before the hot melt 26 is solidified. Thus, the main filter 14 is formed. The hot melt 26 is applied up to the valleys of the folded filter materials 22 and 24, whereby a gap can be maintained on the valley side of the main filter 14. The filter materials 22 and 24 are both composed of synthetic fibers such as ultra-fine polypropylene fibers, for example, and the front filter material 22 is configured to collect almost 90% of permeated particles of 3 μm or more. The rear filter member 24 is configured to collect approximately 50% of the permeating particles of 0.3 μm or more. These two filter materials 22 and 24 are integrated by welding or bonding with an adhesive.

  The frame 10 is formed from a synthetic resin. Grooves 28 and 30 into which the upper and lower ends of the pre-filter 12 and the main filter 14 can be fitted are formed on the inner surfaces of the upper surface 10C and the bottom surface 10D of the frame body 10, and the pre-filter 12 and the main filter 14 have their upper ends. And the lower end is inserted into the grooves 28 and 30 of the upper surface 10C and the bottom surface 10D of the frame body 10 and sandwiched by the upper surface 10C and the bottom surface 10D, and an adhesive 32 made of synthetic resin such as urethane resin is further inserted into the grooves 28 and 30. By pouring, the pre-filter 12 and the main filter 14 can be fixed to the frame body 10. Moreover, since all of the frame body 10, the pre-filter 12, and the main filter 14 are made of synthetic resin, they can be recycled including cleaning and reuse.

  As described above, in the pre-main integrated air filter according to this embodiment, the surface area of the sheet-like filter material 18 is obtained by arranging the pre-filter 12 obliquely with respect to the opening 10 </ b> A on the front surface side of the frame body 10. However, the surface area of the sheet-like filter material 18 may be increased by configuring the thickness of the prefilter 12 in the front-rear direction to be larger than that of the main filter 14, and in this case, the prefilter 12 10 may be provided in parallel with the main filter.

DESCRIPTION OF SYMBOLS 10 Frame 12 Pre filter 14 Main filter 18, 22, 24 Filter material

Claims (7)

A frame that penetrates the front and back surfaces and has an opening over the entire front and back surfaces; and
A pre-filter that is formed by alternately bending sheet-like filter materials in a pleat shape, and provided in the opening on the front side of the frame;
A main filter provided by opening the sheet-like filter material alternately in a pleated shape, and provided in the opening on the back side of the frame;
With
The main filter is formed so as to collect finer particles than the pre-filter,
The prefilter is arranged so that the area facing the front side of the frame body is wider than the main filter so as to extend the service life of the prefilter and match the replacement time of the main filter. A pre-main integrated air filter. The frame, the pre-filter, and the main filter are all made of synthetic resin,
The pre-main integrated air filter according to claim 1, wherein the pre-filter and the main filter are fixed to the frame body with an adhesive made of synthetic resin.   The pre-filter and the main filter are configured by applying a plurality of hot melts continuously in the width direction at equal intervals in the longitudinal direction to the sheet-like filter material, and then bending a plurality of the folds alternately. The pre-main integrated air filter according to claim 1 or 2,   The pre-filter is disposed obliquely with respect to the opening on the front side of the frame so that the area facing the front side of the frame is larger than that of the main filter. The pre-main integrated air filter according to any one of claims 1 to 3. The pre-filter is composed of a plurality of filter blocks formed in a rectangular parallelepiped shape,
The plurality of filter blocks are arranged in the frame so that adjacent ones are inclined to opposite sides so that an area facing the front side of the frame is larger than that of the main filter. Item 5. The pre-main integrated air filter according to Item 4.   The prefilter is configured such that the thickness in the front-rear direction is larger than the thickness in the front-rear direction of the main filter so that the area facing the front side of the frame body is wider than the main filter. The pre-main integrated air filter according to any one of claims 1 to 3. The main filter is formed by superposing two sheet-like filter materials, and the front filter material of the two filter materials is formed so as to collect finer particles than the pre-filter, and The pre-main integrated air filter according to any one of claims 1 to 6, wherein the filter material on the side is formed so as to collect finer particles than the filter material on the front side.

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