JPH0725919U - Filter device - Google Patents

Abstract

(57) [Summary] [Structure] The filter device A is a filter frame 1 having a rear frame part 4, a top plate part 5, a bottom plate part 6 and a front frame part 7, and is further accordion-shaped after being pleated into a corrugated shape. It is composed of a bent filter medium 2 and a filter medium retainer 3 attached to the clean side of the filter medium. The filter medium retainer 3 has a triangular support portion 11 inserted into the accordion-shaped recess of the filter medium and a rod-shaped support portion 12 that abuts a side surface of the filter medium. The filter medium contact surface of the support portion has a pleated portion of the filter medium. Comb-shaped protrusions are formed between the two. [Effect] The support portion of the filter medium retainer and the comb-shaped protrusions prevent deformation of the accordion-shaped filter medium due to the pressure of the filtered air and close contact between the pleats of the filter medium, thereby preventing deterioration of the filtration effect.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a filter device for filtering a fluid such as air, and more particularly to a filter device having a pleated filter medium folded in an accordion shape.

[0002]

[Prior art]

 In filter devices for cleaning fluids such as air, it is widely used to use corrugated filter media such as paper and non-woven fabric, but in recent years, the filtration area within a certain space volume has been further improved. In order to increase the filtration efficiency by increasing the width, it is often practiced to use a pleated filter medium that is further folded into an accordion and housed in a filter device.

[0003]

[Problems to be solved by the device]

 However, when using a pleated filter medium that is further folded into an accordion shape, the filter medium may deform during use or the pleat pleats may become intimate, reducing the filtration effect of the filter medium during use. There was a problem that it was easy to do. That is, when the pleated filter medium is further bent into an accordion shape, the air that has entered from the dirty side of the filter medium pushes the pleated surface of the filter medium in a direction nearly perpendicular to the pleated surface. Since it tends to enter the inside of the pleats of the filter medium after it collides with the pleats, the filter medium will not be deformed toward the clean side or the pressure that causes the pleats to come into contact with each other. It is more susceptible than processed filter media, and this tendency was particularly remarkable in the filter media parts exposed on both the left and right side surfaces of the filter device. Therefore, in the filter device using the filter medium having the above-mentioned shape, it is a major problem to prevent the deformation of the filter medium and the contact phenomenon between the pleats. An object of the present invention is to provide a filter device using a filter medium obtained by further bending a pleated product into an accordion shape, which can prevent the deformation of the filter medium and the contact phenomenon between the pleats. is there.

[0004]

[Means for Solving the Problems]

 In the filter device of the present invention, a filter medium retainer for supporting the filter medium is attached to the clean side of the filter medium as a means for preventing the deformation of the filter medium and the contact phenomenon between the folds. , A triangular support portion inserted into the clean side concave portion of the accordion filter medium, and a lateral support portion abutting the left and right side exposed portions of the filter medium, and at least one of the above-mentioned support portions. A plurality of comb-shaped projections, which are inserted between the pleats of the filter medium, are provided on the side of the side support portion that contacts the filter medium. The filter medium retainer may be integrally formed and manufactured, or may be formed by dividing into a plurality of pieces and assembling them.

That is, the filter device according to the present invention comprises a filter frame having left and right side surfaces open, and a filter element arranged in the filter frame and pleated into a corrugated shape, and further folded into an accordion shape. It has a curved filter medium and a frame-shaped filter medium retainer arranged along the exposed surface of the filter medium on the fluid outflow side and in contact with the filter medium.The filter medium retainer is inserted into the accordion-shaped bent concave portion of the filter medium. And a lateral support portion that comes into contact with the filter medium on both left and right side surfaces of the filter frame. At least one of the above-mentioned support portions has a filter medium contact surface of the lateral support portion. The filter has a plurality of comb-shaped projections inserted between the pleats of the filter medium.

[0006]

[Action]

 When using the filter device of the present invention, a fluid such as air to be filtered enters the accordion-shaped recess on the rear side of the filter medium from the rear of the filter device and is then guided to the pleated surface of the filter medium to form a fold. After entering the space between the pleats, passing through the filter medium, passing through the accordion-shaped concave portion on the front side of the filter medium, it is discharged in front of the filter device. At this time, the accordion-shaped filter medium is bulged and deformed by the incoming air toward the left and right side surfaces of the filter medium and in the direction of the front accordion-shaped recesses, and the pleated surfaces are pushed toward the front of the device to try to come into close contact with each other. However, the triangular support frame and the side support frame of the filter element retainer reliably prevent the filter element from bulging and deforming toward both the left and right side surfaces and in the front concave direction. The comb-shaped projections provided on the filter medium contact surface side and inserted between the pleats of the filter medium have a function of surely preventing the folds of the filter medium from coming into close contact with each other.

[0007]

【Example】

 FIG. 1 is a perspective view of a filter device according to an embodiment of the present invention, and a filter device A comprises a filter frame 1, a filter medium 2 and a filter medium retainer 3. The filter frame 1 has a rear frame part 4, a top plate part 5, a bottom plate part 6, and a front frame part 7. The top plate part 5 and the bottom plate part 6 respectively have four front protruding parts 5a or 6a. Has been formed. The rear frame part 4 connects the top plate part 5 and the bottom plate part 6, and the front frame part 7 connects the four front protruding parts 5a of the top plate part 5 and the four front protruding parts 6a of the bottom plate part 6. is doing. Both left and right side surfaces of the filter frame 1 are open. Each part of the filter frame 1 is made of synthetic resin, and these parts may be integrally molded and manufactured, or each part may be appropriately divided and molded and then assembled by adhesion or the like. Good.

The filter material 2 is a corrugated paper or non-woven fabric that is pleated and then bent into an accordion shape and placed in the filter frame 1 as shown in FIG. As indicated by the arrow in the figure, the filter device enters from the rear side of the filter device, passes through the filter medium, and exits to the front side. A filter medium retainer 3 is attached to the front exposed surface (that is, the clean side) of the filter medium 2. The filter medium retainer 3 is a frame body having a shape shown in FIGS. 3 (A) and 3 (B) (exploded view). In the present embodiment, the filter medium retainer 3 is manufactured by assembling the two lateral frame members 8 and 9 and the single intermediate frame member 10. However, the entire filter retainer 3 may be integrally molded. The filter medium retainer 3 includes three triangular support portions 11 that are inserted into the front concave portion of the accordion-shaped filter medium 2 and contact the ridge lines of the folds of the filter medium 2 to hold them, and the left and right exposed surfaces of the filter medium 2. A rod-shaped support portion 12 is formed for contacting and holding the ridge line of the fold.

A plurality of comb tooth-shaped protrusions 13 are provided on the filter medium contact surfaces of the triangular support portion 11 and the rod-shaped support portion 12, respectively, and the comb tooth-shaped protrusions 13 are provided between the folds of the filter medium 2. Is inserted. Depending on the case, the comb-tooth-shaped protrusion 13 may be provided only on the rod-shaped support portion 12. In this embodiment, the frame members 8, 9 and 10 are made of synthetic resin separately molded and are connected by the connecting projections 14a to 14f. Further, in the present embodiment, the filter medium retainer 3 is composed of three frame members, but it goes without saying that the number of frame members can be increased or decreased depending on the number of valleys of the accordion filter medium. .

When using the filter device in which the filter medium 2 is arranged in the filter frame 1 and the filter medium retainer 3 is attached to the front side, the air to be filtered is behind the filter device A (dirty side). It enters the inside of the filter device, passes through the filter medium 2, and exits to the front (clean side). At this time, the filter medium 2 is bulged and deformed toward the left and right side surfaces of the accordion and in the front concave direction due to the incoming air, and is subjected to pressure in a direction in which the pleats closely contact each other. The triangular support portion 11 and the rod-shaped support portion 12 prevent bulging and deformation, and the comb-shaped projections 13 provided in each support portion and inserted between the folds of the filter medium It is possible to prevent the pleats and pleats of the filter medium 2 from coming into close contact with each other.

[0011]

[Effect of device]

 In the filter device of the present invention, a filter medium retainer is attached to the front side of the filter medium folded in an accordion shape, and a comb-shaped projection provided on the filter medium contact surface of the filter medium retainer is provided between the filter medium folds. By inserting the filter device, it is possible to prevent the filtration efficiency from being lowered due to the deformation of the filter medium due to the fluid pressure during the use of the filter device or the close contact between the pleats. Further, when the filter medium retainer is constructed by assembling a plurality of frame members, an appropriate number can be assembled and used according to the number of accordion-shaped irregularities of the filter medium, which facilitates the production of the device. Therefore, the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a filter device according to an embodiment of the present invention.

FIG. 2 is a schematic view showing an arrangement state of filter media.

FIG. 3A is a top view of the filter medium retainer.

FIG. 3 (B) is an exploded view of the filter element retainer.

[Explanation of Codes] A Filter device 1 Filter frame 2 Filter medium 3 Filter medium retainer 4 Rear frame part 5 Top plate part 5a Front protruding part 6 Bottom plate part 6a Front protruding part 7 Front frame part 8 Side frame member 9 Side frame member 10 Intermediate frame material 11 Triangular support portion 12 Rod-shaped support portion 13 Comb-shaped protrusions 14a, 14b, 14c, 14d, 14e, 14f
Connecting protrusion

Claims (1)

[Scope of utility model registration request] 1. A filter frame having left and right side surfaces open, a folded filter medium disposed in the filter frame and further pleated into a corrugated shape, and a bent filter medium, and the exposure of the filter medium on the fluid outlet side. And a frame-shaped filter material retainer disposed along the surface and in contact with the filter material, wherein the filter material retainer is a triangular support portion inserted into the accordion-shaped bent concave portion of the filter material, and the left and right sides of the filter frame. A side support portion that comes into contact with the filter medium on the surface side, and the filter medium contact surface of at least the side support portion among the support portions,
A filter device having a plurality of comb-shaped projections inserted between the pleats of the filter medium.