JPS6128419A - Air filter for collecting fine particle - Google Patents

Abstract

PURPOSE:To make it possible to secure an air passage and to largely take a filtering area in the same volume without using a separator, by bending a filter material in a zigzag form in both longitudinal and lateral directions. CONSTITUTION:A high density fibrous filter material based on a glass fiber is bent in a zigzag form in two longitudinal and lateral directions. Each of folding lines 5 in the lateral direction is made straight and each of folding lines 6 in the longitudinal direction is made zigzag so as to obliquely cross the folding lines 5 in the lateral direction while bending directions are alternately reversed at every predetermined intervals on the folding lines 5 in the lateral direction and the filter material 1 takes a shape bent in a zigzag form in two longitudinal and lateral directions. The filter material is upwardly bent at parts shown by dot lines and downwardly bent at parts shown by one-dot broken lines.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an air filter for collecting microparticles using a high-density fibrous material.

[Background of the invention]

Air filters for collecting microparticles, which have been conventionally used as air purifying elements in dust-free and sterile equipment, are made of high-density fibrous sheets made of glass fiber or the like as a base material, as shown in Figures 5 to 7. The P material 1 is bent in a zigzag shape in only one direction, and its entire circumference is attached to the material holding frame 4 airtightly with adhesive, and the parallel or wedge-shaped folded portion 1a of the furnace material 1 is
The structure was such that the air to be treated was allowed to flow through it.

However, in such a conventional air filter for collecting fine particles, it is necessary to insert a separator 2 between the folded portions 1a of the furnace material 1 to maintain air passages at a constant interval. Therefore, not only the number of parts increases, but also the pressure loss increases by the flow path resistance due to the separator 2, and furthermore, there are problems such as the separator 2 becoming a source of dust generation. In addition, by bending the P material 1 in a zigzag shape, the filtration area is increased (and pressure loss is reduced), but there is a limit to the P.P. was difficult.

[Purpose of the invention]

An object of the present invention is to provide an air filter for collecting microparticles that is small, has low pressure loss, and has high performance, which can secure air passage spacing without using a separator, and can provide a larger filtration area with the same volume. It is in.

[Summary of the invention]

The present invention has a frame for holding high-density JP material and 9P material, and the furnace material is bent in a zigzag shape along a straight bending line in one of two directions, vertical and horizontal. It is characterized by being bent in a zigzag shape in another direction along a bending line diagonally intersecting the bending line so that the bending direction is alternately reversed at predetermined intervals. This is an air filter for collecting microparticles.

[Embodiments of the invention]

An embodiment of the present invention will be described with reference to FIGS. 1(9) to 4.

Figure 1 is an enlarged □□□ of a part of the P material seen diagonally from above. It is bent in a zigzag shape in both directions.

Figure 2 shows the unfolded shape of this furnace material 1, where the horizontal bending line 5 is a straight line, and the vertical bending line 6 crosses the horizontal bending line 5 obliquely. To make a zigzag shape, the parts indicated by dotted lines are bent upward, and the parts indicated by dashed-dotted lines are bent downward at predetermined intervals on the horizontal bending line 5. The direction is alternately reversed, hardwood 1 is vertical.

It is bent in a zigzag shape in both horizontal directions.

In Figures 3 and 4, the door material 1 bent in this way is stored in the door material holding frame 4, and the entire circumference is glued to the frame 4 with adhesive 3 to prevent air leakage. The finished product is shown airtightly installed.

By configuring the P material 1 to be bent in a zigzag shape in both the vertical and horizontal directions, the strength of the P material 7 itself is increased, so there is no need to use the separator 2 as in conventional products. The intervals between the air inflow and outflow passages formed between the vertically and horizontally folded portions 1b of the door material 1 are maintained almost evenly, and the air to be treated flows through the folded portion 1111 of the 4P material bent at an acute angle. do.

Next, it can be stored in the furnace material holding frame 4 of the same size: /p material 1? Let's compare the filtration area with the conventional product.

The filtration area S1 of the conventional product is the height of the furnace material shown in FIG.
P material width W and number of bends n, 81:h・'w@n
・・・・・・・・・・・・・・・・・・・・・・・・
...It is expressed as (1).

On the other hand, in this embodiment, when the interval d of the horizontal bending lines 50 shown in FIG. =L @sin 2 #=La 2 s
in# * cos I-pe2) eine=w/n,
・L・・・・・・・・・・・・・・・・・・・・・
(3) cosa=h/l, ・・・・・・・・・・・・
・・・・・・・・・・・・・・・・・・(4) Here, t: interval n between vertical bending lines 6, : number of bends by vertical bending line 6 #: inclination angle of vertical bending line 6 W: 5P material width h: ;P material height be.

(2), (3 in (4) formula, w@h: (d,・n,・t)/2・・・・・・・・・
(5) Therefore, from the formula (5), the i filtration area S of the 5p material 1 in this example is s, :2・vr@h@n・・Φ中・・・・I-Fist・
...φ...Monkey...Fist C6). Here, n is the number of times of bending along the horizontal bending line 5.

According to equations (1) and (6), the bending interval d1 of the furnace material shown in FIG. 6 and the bending distance d□ of the furnace material according to the lateral bending resistance line 5 shown in FIG. 1 are the same, and If the width w of the China material, the height h of the 3P material, and the number of times of bending n are the same, in this example, the furnace material with an area approximately twice as wide as that of the conventional product can be stored within the frame for holding the P material. Become.

〔Effect of the invention〕

According to the present invention, since the two pieces of glue are bent in a zigzag shape in both the vertical and horizontal directions, the pieces of paper with the same dimensions compared to conventional products
9 Furnace material that can be neatly stored for material retention The filtration area is large, the strength of the door material itself is increased, and separators are not required to maintain the air passage spacing, eliminating flow path resistance caused by separators. Moreover, since the bending angle of the P material is an acute angle, the same low pressure loss effect as conventionally obtained by using a wedge-shaped separator as shown in FIG. 7 can be obtained. For these reasons, it is possible to downsize the air filter for collecting microparticles and significantly reduce pressure loss, and also improve air purification performance due to no dust generation from the separator and reduce costs due to the reduction in the number of parts. A reduction effect can also be expected.

[Brief explanation of the drawing]

Figures 1N to 4 are diagrams of one embodiment of the present invention, and Figure 1 is
Partially enlarged perspective view of the material, Figure 2 is its developed view, Figure 3 is c
A partially cutaway perspective view of the P material holding frame, FIG. 4 is a side sectional view thereof, and FIG. 5 is a partially cutaway perspective view of a conventional example of an air filter for collecting microparticles. is a side sectional view thereof, and FIG. 7 is a side sectional view of a conventional low-pressure horizontal type. 1: ;, l + material, A = frame for holding furnace material, 5: horizontal bending line, 6: longitudinal bending line II2] $2 Figure 3 Figure 4, Figure 6

Claims (1)

[Claims] It has a high-density filter medium and a frame for holding the filter medium, and the filter medium is bent in a zigzag shape along a straight bending line in one of two directions, vertically and horizontally, and the bending direction is An air filter for collecting microparticles, characterized in that the air filter is bent in a zigzag shape in four other directions along a bending line diagonally intersecting the bending line so as to be alternately reversed at predetermined intervals. .