JP2013123708A - Pocket type air filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the following problems: a conventional pocket type air filter comprises a lattice-like frame and a bag-like filter material, and there are a fixed type wherein the bag-like filter material is fixed to the lattice-like frame by an adhesion material and a detachable type wherein the bag-like filter material is detachably installed, but either of them is separated and disposed of when disposing of the pocket type air filter after use, the amount of waste cannot be reduced, cost reduction has a limit, and further when replacing the bag-like filter material, workability is bad and the lattice-like frame cannot be reused.SOLUTION: In this pocket type air filter, when installing an installation frame and the bag-like filter material, they are installed by a binding band, and when replacing only the filter material of the pocket type air filter, the installation frame is reused by only replacing only the bag-like filter material.

Description

  The present invention relates to a pocket type air filter for treating contaminated air generated from a clean air intake such as a general air conditioner, a building air conditioner, or a gas turbine intake or a factory.

The conventional pocket-type air filter has a structure in which it is supported and fixed to the mounting frame with a rivet or an adhesive in order to maintain the airtightness between the mounting frame and the bag-shaped filter medium and to withstand the pressure of the airflow.

  For this reason, when the bag-shaped filter medium has reached the end of its life due to clogging of the bag-shaped filter medium, it is necessary to replace the bag-shaped filter medium together with the mounting frame. In particular, when processing polluted air in a paint factory or subway premises with a relatively high concentration of dust, the amount of dust and lint in the air is large, so the pressure drop resistance of the filtration surface of the bag-shaped filter media immediately increases, and the filtration air volume Therefore, it was necessary to frequently replace the bag-shaped filter medium. Since it is necessary to replace the entire mounting frame for replacement, there is a problem in that the cost increases and the entire transportation needs to be carried.

  In addition, when fumes are contained in the processing gas together with dust or separately, moist dust adheres to the filtration surface of the bag-shaped filter medium, even though it does not reach the dust collection capacity. The pressure loss resistance suddenly increased, and the bag-shaped filter medium had to be replaced frequently, resulting in a great problem in terms of running cost.

  Also, when disposing of used bag-shaped filter media, the mounting frame and the bag-shaped filter media are firmly attached, so it takes time to divide, and the mounting frame is made of plastic or metal. Has a problem of requiring separate disposal because it is made of glass fiber and nonwoven fabric.

In order to solve the above problems, a method that does not fix the attachment frame and the bag-shaped filter medium, for example, a method in which the bag-shaped filter medium is fitted to a rectangular attachment frame and is detachable with a presser bar is considered. It takes a lot of parts to be able to withstand air tightness and air pressure, and it takes time and effort to assemble the pocket air filter, and the mounting frame is deformed or dirty when removed, There was no idea of reusing the mounting frame.

Problems to be solved by the invention

  Accordingly, the present invention is intended to solve these problems, and a first object of the present invention is to make it possible to reuse the mounting frame only by replacing a new bag-shaped filter medium.

  The second object of the present invention is to allow the bag-shaped filter medium to be easily attached to and detached from the attachment frame.

  A third object of the present invention is to attach the bag-shaped filter medium so that the life of the bag-shaped filter medium is long.

Means for solving the problem

  The first solving means of the present invention is characterized by comprising a bag-shaped filter medium and an attachment frame in which a U-shaped groove is formed on the outer peripheral surface.

  The second solving means of the present invention is characterized in that the end of the bag-shaped filter medium is detachably attached to the U-shaped groove formed on the outer peripheral surface with a binding band.

  Here, the bag-shaped filter medium is formed by superposing two rectangular filter media, excluding one side edge, sandwiching the other side edge portion with a covering cloth, and stitching it with a thread from the covering cloth to form a bag shape.

  Furthermore, the opening part which has a function of a gas inflow port is formed in the one side edge of a bag-shaped filter medium. Further, a reinforcing cloth is sewn on the edge of the opening and integrated with the filter medium. Adjacent opening edges are sewn together with a reinforcing cloth with a thread. In addition, the bag-shaped filter media are provided with long and short suture lines to prevent the bag-shaped filter media from coming into contact with each other even when blown by blowing, preventing the airflow from flowing and preventing the filter media from being frictioned or damaged. .

  The bag-shaped filter medium used in the present invention includes, for example, a glass mat, a synthetic fiber nonwoven fabric, a laminate of ultrafine fibers and a glass mat, a blended product or a laminate of ultrafine fibers and a synthetic fiber nonwoven fabric, and a blended product. Etc. can be used.

In addition, the density of the filter medium is not particularly limited as it can be used as it is as a bag-shaped filter medium. Generally, it is 50-370 g / m < ² >, and 60-200 g / m < ² > is still better among them.
The thickness of the filter medium is not particularly limited as long as it can be used as it is as a conventional bag-shaped filter medium. Generally, it is 5-20 mm, and 5-10 mm is still better among them.

  And the width | variety of a covering cloth is preferable so that the side edge part of a filter medium may not be loosened, and may become the obstacle to the flow of airflow. Furthermore, when a synthetic fiber non-woven fabric is used for the bag-shaped filter medium, it is possible to perform heat welding instead of sewing.

  Next, the mounting frame is formed in a rectangular shape corresponding to the shape of the opening of the bag-shaped filter medium by forming a U-shaped groove on the outer peripheral surface. Can be used as a fixed frame.

  Further, when the bag-shaped filter medium is attached to the mounting frame with a binding band, the bag-shaped filter medium can be easily attached to and detached from the mounting frame.

  Further, nylon, polyester, polypropylene, fluororesin, polyetheretherketone, etc. are used as the material for the binding band.

The effect | action by the said problem-solving means is as follows. In other words, the pocket-type air filter has a structure in which the opening edge of the bag-shaped filter medium can be attached and removed easily and detachably with a binding band in a U-shaped groove formed on the outer peripheral surface of the mounting frame. The bag-shaped filter medium is prevented from detaching due to external force due to pressure fluctuation, vibration or turbulence of the strong airflow from the side. In addition, the bag-shaped filter medium swells due to the airflow that flows into the opening edge of the bag-shaped filter medium, but since the bag-shaped filter medium is sewn together with thread, friction and damage due to the proximity of the bag-shaped filter medium to each other are prevented. Moreover, it can prevent that the effective filtration area at the time of ventilation becomes small.

Effect of the invention

As described above, the pocket-type air filter of the present invention has the following effects.
(1) Since the end portion of the bag-shaped filter medium is detachably attached with a binding band, it can be easily and firmly tightened.
(2) Since the bag-shaped filter medium can be easily attached and detached from the mounting frame, only the bag-shaped filter medium needs to be replaced, and the mounting frame can be reused.
(3) The number of parts can be reduced and the weight can be reduced.
(4) Replacement parts are not damaged and are inexpensive.
(5) Since only the bag-shaped filter medium can be exchanged, only the bag-shaped filter medium can be discarded, contributing to the volume reduction of industrial waste.
(6) Since the bag-shaped filter medium can be easily attached and detached from the attachment frame simply by cutting the binding band, it is possible to greatly reduce the labor for sorting.
(7) Since the attachment of the bag-shaped filter medium and the attachment frame is ensured, the bag-like filter medium does not come off due to a strong drift from the upstream side or an air current such as turbulent flow.
(8) Since only the bag-shaped filter medium needs to be replaced, the cost of the entire pocket-type air filter can be reduced.
(9) When replacing the bag-shaped filter medium, only the filter medium needs to be transported, and the transportation cost can be reduced.

The exploded perspective view of the pocket type air filter of the present invention. FIG. 2 is an exploded perspective view of a part of the pocket air filter of FIG. 1. The whole figure which assembled the pocket type air filter of Drawing 1. AA sectional drawing of FIG. The enlarged view which shows the B section of FIG. FIG. 6 is a schematic view of part of FIG. 5.

Hereinafter, a filter medium exchange type pocket-type air filter according to an embodiment of the present invention will be described with reference to the accompanying drawings.

A first embodiment will be described with reference to FIGS. In the figure, 1 is a bag-shaped filter medium made of glass fiber, two rectangular filter media are overlapped, one side edge is removed, the other side edge is covered with cloth 2, and the cloth 2 is sewn together with a thread to form a bag. It is what I made. Moreover, the opening part which has a function of a gas inflow port is formed in one side edge, and the reinforcement cloth 4 is sewn on this opening edge part 3. FIG. The adjacent opening edge 3 is sewn together with a reinforcing cloth 4 with a thread, and a plurality of bag-shaped filter media 1 are connected and sewn. Further, the bag-shaped filter medium 1 is provided with a long suture line 5 and a short suture line 6.

  Next, reference numeral 7 denotes a mounting frame which is composed of a lattice bar 8 and an outer peripheral frame 9. A U-shaped groove 10 is formed on the outer peripheral surface of the outer peripheral frame 9 of the mounting frame 7. Furthermore, the opening edge 3 and the reinforcing cloth 4 of the bag-shaped filter medium 1 are held by being tightened by the binding band 11 over the entire side surface of the outer peripheral frame 9.

  Further, reference numeral 12 denotes a cover of the mounting frame 7, and a concave shape is formed at a position corresponding to the lattice bar 8 and the outer peripheral frame 9 of the mounting frame 7. In addition, two steel plate and resin stoppers 13 are provided on the side of the cover 12, respectively.

  Furthermore, the attachment frame 7 and the cover 12 are tightly fixed by pressing the retaining member 13 with the attachment frame 7 fitted to the cover 12.

  And when replacing | exchanging a new bag-shaped filter medium by the lifetime of a bag-shaped filter medium, the securing tool 13 is first released and the attachment frame 7 is removed from the cover 12. FIG. Next, the binding frame 11, the opening edge 3 of the bag-shaped filter medium 1, and the binding band 11 to which the reinforcing cloth 4 is attached are removed, and the bag-shaped filter medium 1 is removed from the mounting frame 7, and replaced with a new bag-shaped filter medium. The mounting frame 7 is reused.

  The mounting frame 7 may be handled in units of one, but can be used as a fixed frame by combining a plurality of mounting frames 7.

  In the above-described embodiment, only one example is described, and the gist of the present invention is not changed at all by various changes.

  The present invention is a pocket-type air filter used as a pre-filter or medium-high performance filter used for factory air conditioning, building air-conditioning, subway station premises, outside air intake such as gas turbine intake, air conditioning, etc. By simply doing this, the mounting frame can be reused. This is useful for reducing costs, and when replacing the bag-shaped filter medium, it can be separated and discarded by a simple operation.

DESCRIPTION OF SYMBOLS 1 ... Bag-shaped filter medium 2 ... Covering cloth 3 ... Opening edge part 4 ... Reinforcement cloth 5 ... Long suture line 6 ... Short suture line 7 ... Mounting frame 8 ...・ Lattice beam 9 ... Outer peripheral frame 10 ... U-shaped groove 11 ... Bundling band 12 ... Cover 13 ... Retaining tool 13

Claims (2)

A pocket-type air filter comprising a bag-shaped filter medium and a mounting frame, wherein the bag-shaped filter medium is detachably mounted with a binding band, and the mounting frame can be reused only by replacing the bag-shaped filter medium.   The pocket-shaped air filter according to claim 1, wherein a U-shaped groove is formed on the outer peripheral surface of the mounting frame, and an opening edge of the bag-shaped filter medium is detachably attached to the groove with a binding band.

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