JPH0817902B2 - Roll filter with built-in unit filter - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an air filter used for cleaning indoor air for air conditioning in buildings and factories.

[Prior Art] In order to clean indoor air in buildings, factories, etc., an air filter that filters contaminated air with a filter material such as non-woven fabric, filter paper, and glass fiber to remove suspended dust contained in the air is used. Known is a fixed unit filter in which a filter medium is housed in a rectangular cell, or a roll filter in which roll-shaped filter media are sequentially wound.

In the former unit filter, non-woven fabric or filter paper, which is the filter medium, can be folded in a zigzag shape or corrugated and stored in the casing.Therefore, the filtration area of the filter medium should be large per unit cross-sectional area of the duct through which the contaminated air to be removed passes. Although it is possible to obtain high filtration performance, there is a drawback that the filter material is gradually contaminated due to long-term use, clogging occurs, pressure loss increases and the performance gradually decreases, while the latter roll filter has a problem. Although there is an advantage that a new filter surface can always be used by successively winding a filter medium such as glass fiber contaminated by the trapped dust, the cross-sectional area of the duct through which the contaminated air passes is equal to the filter area of the filter medium. Since the cross-sectional area of the duct must be wide in order to increase the treated air volume, the opening is relatively large compared to the unit filter. There is a disadvantage that it requires the product. In this way, it can be said that both have advantages and disadvantages.

[Problems to be Solved by the Invention] Therefore, both a roll filter and a unit filter are connected in series, and a roll filter is provided on the dirty side (polluted air inflow side) and a unit filter is provided on the clean side (clean air discharge side). If they are installed, they can complement each other to maintain high filtration efficiency for a long period of time, but since both require separate casings, they must be installed for their installation.
There is a problem that an installation space of “roll filter thickness (depth) + unit filter thickness (depth)” is required, and a dead space increases.

In order to solve this problem and to provide an air filter that has the advantages of both a roll filter and a unit filter in a small installation area and that can complement the disadvantages, the inventors have made a filter material wound in a roll shape. Of the roll filter, which is configured to sequentially wind from the loading side to the winding side through the filtering surface, in the space located behind the filtering surface between the loading side and the winding side, the filter medium is placed in a rectangular cell. We have developed a roll filter with a built-in unit filter that accommodates the fixed type unit filter.

However, when the unit filter is arranged behind the filtration surface of the roll filter as described above, the unit filter can be moved only in the axial direction of the duct.
There was a new problem that the filter material of the roll filter had to be removed for removal.

The present invention solves both of the above problems, has the advantages of both a roll filter and a unit filter with a small installation area, can complement the disadvantages, and further, without removing the filter material of the roll filter, the unit filter Installation of
An object of the present invention is to provide a roll filter with a built-in unit filter, which enables removal and facilitates replacement work of the filter material of the unit filter.

[Means for Solving Problems] The present invention provides means for solving the above problems, in which a filter medium 1 wound in a roll shape is passed from a loading side 2 through a filtering surface 3. Fixing of a filter medium housed in a rectangular cell in a space 5 located behind the filtration surface 3 between the loading side 2 and the winding side 4 of a roll filter that is sequentially wound up on the winding side 4. Type unit filter 6 is accommodated, at least one roll support shaft 4 '(or 2') on the loading side or the winding side of the roll filter is rotatable outside the machine, and the roll support shaft is sandwiched. The partition plates 7 and 8 arranged in parallel with each other can be rotated from the plane orthogonal to the filtration surface 3 to the plane parallel to the unit filter 6 in parallel with the filtration surface 3 of the roll filter. Can be moved in any direction, and can be freely attached and detached A roll filter with a built-in unit filter is characterized by the above.

[Operation] Since the present invention has the above-described configuration, the intake air is first filtered by the filtering surface 3 of the roll filter to remove most of the dust, and then further filtered by the unit filter 6 to be cleaned and indoors. Supplied.

The filtration surface 3 of the roll filter, which has been contaminated by the adhered dust, is successively wound onto the winding side 4 and the loading side 2 is replenished with new filter medium 1.

Since the air flow supplied to the unit filter 6 has already been filtered by the filtering surface 3 of the roll filter and most of the dust has been removed, the amount of dust accumulated on the filter material of the unit filter 6 remains even if it is further cleaned. The increase in pressure loss is slowed down, and the frequency of filter medium replacement can be reduced.

When it becomes necessary to replace the filter material of the unit filter 6 due to long-term operation, as shown in FIG. 2, one of the roll support shafts 4'is rotated to the outside of the machine, and then the partition plates 7 and 8 are rotated. Is rotated from a plane (horizontal position in the figure) orthogonal to the filtration plane 3 to a plane (vertical position in the figure) parallel to the unit filter 6
Can be taken out in a direction parallel to the filtering surface 3 of the roll filter (vertical direction in the drawing) to replace the filter medium inside the unit filter 6.

After the replacement of the filter material, the unit filter 6 can be attached to the original position by the reverse operation. That is, in FIG. 2, the unit filter 6 is first inserted in the vertical direction and mounted in the space 5, and then the partition plates 7 and 8 are rotated and fixed from the vertical position to the horizontal position, and then the roll supporting shaft is fixed. 4 ′ may be returned to its original position and fixed.

[Embodiment] An embodiment of the present invention shown in the drawings will be described.

Reference numeral 1 is a filter material such as glass wool wound in a roll shape, which is adapted to be wound from a loading side 2 through a filtering surface 3 to a winding side 4.

A unit filter 6 is arranged in a space 5 located behind the filtration surface 3 between the loading side 2 and the winding side 4.

It is well known that a filter material such as a non-woven fabric is folded and housed in a zigzag shape in the unit filter 6.

One end of the roll support shaft 4'on the winding side 4 is pivotally supported by a rotary plate 4 "pivotally mounted on the machine frame.
It can be rotated to the position shown.

7 and 8 are partition plates whose one end is pivotally attached to the machine frame, and are normally the first
Although it is fixed in the horizontal direction as shown in the drawing, it can be rotated in the vertical direction as shown in FIG. 2 when the unit filter 6 is attached and detached.

Reference numeral 9 in the drawing denotes a guide rail for attaching and detaching the unit filter 6.

[Effect] According to the present invention, the roll filter and the unit filter are connected in series without increasing the installation area to provide an air filter which has both advantages and complements the disadvantages, and moreover, the roll filter. Partition plates 7 which allow at least one of the roll support shafts 4 '(or 2') on the loading side or the winding side to be rotated outside the machine and which are arranged in parallel to each other with the roll support shafts sandwiched therebetween. 8 for filtration surface 3
Since the unit filter 6 can be moved in the direction parallel to the filtration surface 3 by being rotatable from the plane orthogonal to the plane parallel to the plane, the unit filter 6 can be freely attached and detached. It is not necessary to remove the filter medium 1 of the roll filter when the filter medium 6 is replaced, and the filter surface 3
With the unit in the operating position, the unit filter 6 is taken out in a direction parallel to the filtering surface 3 of the roll filter, and
There is an effect that can be attached.

[Brief description of drawings]

The drawings show an example of an embodiment of the present invention. FIG. 1 is a longitudinal side view, and FIG. 2 is an operation explanatory view of essential parts. 1: Filter material 2: Loading side 2 ': Roll shaft 3: Filtering surface 4: Winding side 4': Roll shaft 4 ": Rotating plate 5: Space part 6: Unit filter 7,8: Partition plate 9: Guide rail

Claims (1)

[Claims] 1. A roll filter in which a filter medium wound in a roll shape is sequentially wound from a loading side through a filtering surface to a winding side, and behind the filtering surface between a loading side and a winding side. In the space located at, the fixed unit filter in which the filter medium is housed in a rectangular cell is housed, and at least one roll support shaft on the loading side or the winding side of the roll filter is rotatable out of the machine. And, by making the partition plates arranged in parallel to each other with the roll support shaft interposed therebetween from the plane orthogonal to the filtration plane to the plane parallel to the unit filter, the unit filter is rolled. Roll filter with built-in unit filter characterized by being movable and movable in the direction parallel to the filtration surface of the unit.