JP2013223816A - Filter frame and ventilator provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter frame for achieving the suppress of a production cost and the improvement of the design flexibility of a filter to be set up.SOLUTION: A filter frame, that retains a filter for removing dust in a fluid and is set up in a ventilator, consists of a flat member bent and sterically assembled to be a box to store the filter, the flat member having open sections formed therein to expose the upstream side surface and the downstream side surface of the filter in an assembled state.

Description

  The present invention relates to a filter frame and a ventilation device including the same.

Conventionally, a ventilator having a configuration in which a filter frame to which an arbitrary filter is attached is attached to a filter unit main body and the filter unit main body is installed in the ventilator main body has been proposed (for example, see Patent Document 1).
In the technique described in Patent Document 1, a dedicated mold is manufactured, and a filter frame is obtained by injection molding with a molding machine.

International Publication No. 2010/095237

The technique described in Patent Literature 1 requires a dedicated mold or molding machine to obtain a filter frame, and thus there is a problem that the manufacturing cost of the ventilation device increases accordingly.
In addition, when filter frames of various sizes are required in a small lot, a dedicated die must be manufactured for each filter size, and the problem that the manufacturing cost increases becomes more prominent. there is a possibility.

  Since the technique described in Patent Document 1 obtains a filter frame by injection molding, it is necessary to ensure the minimum wall thickness of the filter frame. That is, the technique described in Patent Document 1 has a problem in that the degree of freedom in designing the filter is impaired because the thickness of the filter attached to the filter frame is restricted by ensuring the minimum thickness of the filter frame. It was.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a filter frame that realizes a reduction in manufacturing cost and an increase in design flexibility of a filter to be installed. Yes.

  The filter frame according to the present invention holds a filter that removes dust in the fluid, and in the filter frame installed in the ventilation device, an open portion that exposes the upstream side surface and the downstream side surface of the filter in the assembled state is formed. The flat plate-like member is folded in a three-dimensional manner so as to accommodate the filter.

According to the filter frame according to the present invention, in the assembled state, a plate-like member formed with an open portion that exposes the upstream side surface and the downstream side surface of the filter is assembled three-dimensionally so that the filter is accommodated by bending. Since it is box-shaped, manufacturing costs can be suppressed.
Further, according to the filter frame according to the present invention, since the filter frame is not obtained by injection molding, it is not necessary to consider ensuring the minimum wall thickness in the injection molding, and the degree of freedom in designing the filter size. Can be increased.

It is a perspective view in the installation state of the main body of the ventilation apparatus which concerns on embodiment of this invention. It is a perspective view of the state which took out the outside air cleaning filter unit from the main part of the ventilation apparatus shown in FIG. It is a schematic diagram which shows the example of a schematic structure of the principal part of the main body of the ventilation apparatus which concerns on embodiment of this invention. It is a perspective view of an outside air cleaning filter unit. It is a longitudinal cross-sectional view in dotted line AA of the outside air cleaning filter unit shown in FIG. It is a perspective view of the state which decomposed | disassembled the outside air cleaning filter unit into the filter frame, the outside air filter case, and the outside air filter frame. It is a front view of the open state (pre-folding state) of the filter frame. It is a perspective view of the state which assembled the filter frame. It is a perspective view of the open state (after folding habit addition) of the filter frame. It is a perspective view of a filter frame after carrying out bending to a filter frame. It is a perspective view of the filter frame after further bending with respect to the filter frame from the state of FIG. It is explanatory drawing about the return force (back spring) which arises by bending a filter frame in the state which assembled the filter frame.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the ventilation device main body 500 according to the embodiment in an installed state. FIG. 2 is a perspective view showing a state in which the outside air cleaning filter unit 301 is taken out from the main body 500 of the ventilation apparatus shown in FIG. FIG. 3 is a schematic diagram illustrating a schematic configuration example of a main part of the main body 500 of the ventilation device according to the embodiment.
The filter frame 1 according to the present embodiment makes it possible to reduce manufacturing costs and increase design flexibility.

First, an example of a ventilation device in which the filter frame 1 is installed will be described before the description of the filter frame 1. For example, the ventilation apparatus is configured such that the main body 500 is installed in an attic space or a first floor ceiling space in a building. In the ventilation device, the main body 500 is connected to an outside air duct, an air supply duct, an exhaust duct, and the like provided in the building.
That is, the ventilator is supplied to the main body 500 with outside air including dust and insects via an outside air duct communicating with a space outside the building. And after the said external air is cleaned by the filter provided in the main body 500, it is supplied in a building through an air supply duct. In the ventilation device, air in the building is sucked into the main body 500 and discharged through the exhaust duct.
Below, the main body 500 of a ventilation apparatus is demonstrated.

(Main body 500)
The main body 500 has a substantially rectangular parallelepiped outer shape, and heats the first blower 572 for taking in outside air, the second blower 574 for taking in indoor air, and the outside air and supply air introduced into the main body 500. A heat exchange element unit 571 to be exchanged, an outside air cleaning filter unit 301 for cleaning outside air introduced into the main body 500, a panel 501 constituting a part of the lower surface of the main body 500, and an exhaust filter 502 provided on the panel 501. Have.

  The main body 500 is provided with an outside air duct connection port 523 connected to the outside air duct, an air supply duct connection port 524 connected to the air supply duct, and an exhaust duct connection port 522 connected to the exhaust duct. It has been. In addition, as shown in FIG.1 and FIG.2, although the example in which the several air supply duct connection port 524 was formed was shown in figure, the number formed is not limited to FIG.1 and FIG.2.

The main body 500 has a supply air passage and an exhaust air passage. That is, the main body 500 has an air supply air passage that communicates the outside air duct connection port 523, the outside air cleaning filter unit 301, the heat exchange element unit 571, the first blower 572, and the air supply duct connection port 524, and the exhaust filter 502, An exhaust air passage communicating the heat exchange element portion 571, the second blower 574, and the exhaust duct connection port 522 is provided.
Note that the air flow in the supply air passage corresponds to S shown in FIG. 3, and the air flow in the exhaust air passage corresponds to E shown in FIG.

  As shown in FIG. 2, the main body 500 is provided with a receiving portion 591 for supporting the outside air cleaning filter unit 301. The receiving portions 591 are provided in a number corresponding to the fix pieces 504 at positions corresponding to the fix pieces 504 of the outside air cleaning filter unit 301 described later in a state where the outside air cleaning filter unit 301 is installed in the main body 500. .

(First fan 572 and second fan 574)
The first blower 572 and the second blower 574 take air into the main body 500 and release it. The first blower 572 includes a rotating fan 572A and an electric motor 572B that rotates the fan 572A. The second blower 574 includes a rotating fan 574A and an electric motor 574B that rotates the fan 574A.
The first blower 572 is a supply air passage and is provided on the downstream side of the heat exchange element portion 571. The second blower 574 is an exhaust air passage and is provided on the downstream side of the heat exchange element portion 571.

(Heat exchange element part 571)
The heat exchange element 571 exchanges heat between outside air (supply air) introduced into the main body 500 and indoor air (exhaust gas). In other words, the heat exchange element portion 571 has a function of collecting the heat quantity of the exhaust gas with supply air. The outside air (supply air) flowing into the heat exchange element portion 571 and the indoor air (exhaust air) are not mixed.
The heat exchange element portion 571 is provided so as to communicate with the supply air passage and with the exhaust air passage. The heat exchange element 571 is provided on the downstream side of the outside air cleaning filter unit 301 and on the upstream side of the first blower 572 in the supply air path. Further, the heat exchange element portion 571 is provided on the downstream side of the exhaust filter 502 and on the upstream side of the second blower 574 in the exhaust air passage.

(Outside air cleaning filter unit 301)
The outside air cleaning filter unit 301 removes coarse dust in the air. In other words, the outside air cleaning filter unit 301 has a plurality of filters including the filter 2 (see FIGS. 4 to 6) that removes coarse dust in the air, and the coarse dust in the air introduced into the main body 500. Can be removed by the filter. The outside air cleaning filter unit 301 is provided on the upstream side of the heat exchange element portion 571 in the supply air path.
A handle 505 for holding the outside air cleaning filter unit 301 when the outside air cleaning filter unit 301 is taken out, a fix piece 504 for mounting the outside air cleaning filter unit 301 in the main body 500, and the like are provided below the outside air cleaning filter unit 301.

  The outside air cleaning filter unit 301 is covered with the exhaust filter 502 at a lower portion of the exhaust filter 502 in a closed state. The lower part of the outside air cleaning filter unit 301 is exposed by opening the exhaust filter 502 (see FIG. 1). Then, the user can open the exhaust filter 502 to expose the lower part of the outside air cleaning filter unit 301 and hold the handle 505 to pull out the outside air cleaning filter unit 301 from the main body 500 (see FIG. 2).

The outside air cleaning filter unit 301 is supported by the receiving portion 591 while being provided in the main body 500. That is, since the fix piece 504 of the outside air cleaning filter unit 301 is supported by the receiving portion 591, the outside air cleaning filter unit 301 is attached inside the main body 500. Then, by rotating the fix piece 504 in the horizontal direction, the support from the receiving portion 591 is released, and the outside air cleaning filter unit 301 can be removed from the main body 500.
The configuration of the outside air cleaning filter unit 301 will be described in detail later with reference to FIGS. 4 to 6.

(Panel 501)
The panel 501 constitutes a part of the lower surface of the main body 500. The panel 501 is provided on the lower side of the main body 500 so as to constitute a part of the lower surface of the main body 500. On the panel 501, the end side of the exhaust filter 502 is rotatably fixed so that the exhaust filter 502 can be pulled out from the main body 500.

(Exhaust filter 502)
The exhaust filter 502 is a filter for removing coarse dust and the like contained in indoor air, and has a substantially rectangular shape in plan view. One of the four end sides of the exhaust filter 502 is rotatably fixed to the panel 501.

[Outline configuration of outside air cleaning filter unit 301]
FIG. 4 is a perspective view of the outside air cleaning filter unit 301. FIG. 5 is a longitudinal sectional view taken along a dotted line AA of the outside air cleaning filter unit 301 shown in FIG. FIG. 6 is a perspective view showing a state in which the outside air cleaning filter unit 301 is disassembled into the filter frame 1, the outside air filter case 506, and the outside air filter frame 507. The outside air cleaning filter unit 301 will be described in detail with reference to FIGS.

  As shown in FIG. 6, the outside air cleaning filter unit 301 accommodates an outside air filter frame 507 to which the filter frame 1 and the outside air filter case 506 can be attached, and an arbitrary filter 2 selected according to the use of a user, for example. The filter frame 1 and the outside air filter case 506 in which the mesh filter 302 and the outside air cleaning filter 303 are housed are provided.

(Outside air filter frame 507)
The outside air filter frame 507 includes a base portion 509D to which the lower side of the outside air filter case 506 comes into contact, a first side surface portion 509A standing on one end side of the base portion 509D, and a second side surface standing on one end side of the base portion 509D. The portion 509B has a beam portion 509C having one end connected to the first side surface portion 509A and the other end connected to the second side surface portion 509B.

(Base 509D)
The base 509 </ b> D constitutes a lower outline of the outside air filter frame 507. In the base portion 509D, a first side surface portion 509A is erected on the “one end” side, and a second side surface portion 509B is erected on the “other end” side. Here, “one end” and “the other end” correspond to “one end” and “the other end” in the width of the outside air filter frame 507 when the outside air filter frame 507 is viewed from the air flow direction.
On the lower surface side of the base 509D, a handle 505 for holding the outside air cleaning filter unit 301 when it is taken out and a fix piece 504 for mounting the outside air cleaning filter unit 301 in the main body 500 are provided. On the upper surface side of the base 509D, there are provided an insect receiver 509E for storing insects, a pool 509F and a pool 509G capable of storing water and the like.

(Handle 505)
The handle 505 is a portion that is held by a user or the like so that the outside air filter frame 507 can be removed from the main body 500. The handle 505 is formed on the lower surface side of the base 509D so as to protrude downward. Although FIG. 5 illustrates an example in which the vertical cross-sectional shape of the portion protruding to the lower side of the handle 505 is substantially rectangular, it is not limited thereto.

(Fix piece 504)
The fix piece 504 is a component for holding the outside air filter frame 507 in the main body 500. The fix piece 504 is provided on the lower surface side of the base portion 509D and can be axially rotated in the horizontal direction. That is, when the fixed piece 504 is rotated by a predetermined angle, the holding of the outside air cleaning filter unit 301 from the receiving portion 591 is released, and the outside air cleaning filter unit 301 can be detached from the main body 500 (FIG. 2). reference).

(Insect receiver 509E)
The insect receiver 509E is for collecting dust including insects collected by the mesh filter 302 and falling on the outside air filter frame 507. That is, the insect receiver 509E has a predetermined storage volume in order to prevent the pressure loss from being reduced and the ventilation performance from being reduced even if a large amount of insects are collected and stored. . The insect receiver 509E is provided on the upstream side of the mesh filter 302. In addition, the insect receiver 509E is configured by the upper surface of the base 509D, the inner surface of the first side surface portion 509A, and the inner surface of the second side surface portion 509B.

(Pool 509F and Pool 509G)
The pool 509F and the pool 509G can store water or the like. For example, when the outside air contains a lot of mist, the mist is condensed by the mesh filter 302 and the outside air cleaning filter 303 and flows down downward by its own weight. The pool 509F and the pool 509G can store the water that has flowed downward.
The pool 509F and the pool 509G are configured by at least the upper surface of the base portion 509D, the inner surface of the first side surface portion 509A, and the inner surface of the second side surface portion 509B. A pool 509G is provided on the downstream side of the pool 509F.

(First side surface portion 509A and second side surface portion 509B)
The first side surface portion 509A is erected on one end side of the base portion 509D, and holds the filter frame 1 and the outside air filter case 506.
The first side surface portion 509A faces one side surface of the filter frame 1 and the outside air filter case 506 in a state where the filter frame 1 and the outside air filter case 506 are attached to the outside air filter frame 507. One side of the filter case 506 is held. An insertion groove 304A for holding one end side of the filter frame 1 is formed in the first side surface portion 509A.

The second side surface portion 509B is erected on the other end side of the base portion 509D at a position opposed to the first side surface portion 509A, and holds the filter frame 1 and the outside air filter case 506.
The second side surface portion 509B faces the other side surface of the filter frame 1 and the outside air filter case 506 when the filter frame 1 and the outside air filter case 506 are attached to the outside air filter frame 507. The other side surface side of the filter case 506 is held. An insertion groove 304B for holding the other end side of the filter frame 1 is formed in the second side surface portion 509B.

(Beam 509C)
The beam portion 509C has one end connected to the first side surface portion 509A and the other end connected to the second side surface portion 509B. A rib 509H is formed on the beam portion 509C so as to extend from the first side surface portion 509A toward the second side surface portion 509B, and an air supply air path when the outside air cleaning filter unit 301 is attached to the main body 500 is formed. The air tightness is improved.

(Filter frame 1)
The filter frame 1 is a thin plate material, and can be obtained, for example, by cutting with a Thomson type or a cutter. In addition, as will be described later with reference to FIGS. 7 to 12, the filter frame 1 is formed into a box shape by bending a member having a predetermined shape to form a box shape, and a frame having a substantially rectangular shape in a longitudinal section is configured. It is like that. That is, the filter frame 1 can be stored so as to cover the arbitrary filter 2 and hold the filter 2 by placing the arbitrary filter 2 on the rear surface portion 11 (described later) of the filter frame 1 and folding it. Is.
The arbitrary filter 2 is selected according to the user's application, such as a nonwoven fabric filter, a NOx absorption filter, and a special paper pleated filter.

As shown in FIG. 6, the filter frame 1 is provided on the outside air filter frame 507 so as to be substantially perpendicular to the air flow direction. More specifically, the lower end portion side of the filter frame 1 is held by the base portion 509D of the outside air filter frame 507, one side end portion side of the filter frame 1 is held by the first side surface portion 509A, and the other side end of the filter frame 1 The part side is held by the second side face part 509B. The filter frame 1 is provided on the downstream side of the outside air filter case 506 in the air flow direction.
The detailed configuration of the filter frame 1 will be described in detail later with reference to FIGS.

(Outside air filter case 506)
The outside air filter case 506 houses the mesh filter 302 and the outside air cleaning filter 303, and includes a mesh filter frame 509 and an outside air filter holding unit 510.
The mesh filter frame 509 holds the mesh filter 302 and houses the outside air cleaning filter 303 together with the outside air filter holding unit 510. The mesh filter frame 509 is attached to the outside air filter frame 507 so as to be positioned upstream of the outside air filter holding unit 510 in the air flow direction. On the upper part of the mesh filter frame 509, a claw portion 508 that fits with the outside air filter holding portion 510 is formed.

  The outside air filter holding unit 510 stores the outside air cleaning filter 303 together with the mesh filter frame 509. The outside air filter holding unit 510 is provided so as to be positioned upstream of the mesh filter frame 509 in the air flow direction. A claw portion 508 that fits with the mesh filter frame 509 is formed on the upper portion of the outside air filter holding portion 510.

  The mesh filter 302 is a filter configured to remove coarse dust contained in outside air, particularly coarse dust having a large diameter. The mesh filter 302 is provided in the outside air filter case 506 so as to be substantially perpendicular to the air flow direction. More specifically, the mesh filter 302 is provided such that the upstream side surface is pressed against the mesh filter frame 509 and the downstream side surface of the mesh filter 302 is pressed against the front surface side of the outside air cleaning filter 303.

  The outside air cleaning filter 303 is a filter that removes fine dust such as pollen among coarse dust. The outside air cleaning filter 303 is provided in the outside air filter case 506 so as to be substantially perpendicular to the air flow direction. More specifically, the outside air cleaning filter 303 is provided with its upstream side surface pressed against the mesh filter 302, and the downstream side surface of the outside air cleaning filter 303 is pressed against the outside air filter holding unit 510.

FIG. 7 is a front view of the filter frame 1 in the open state (before folding). FIG. 8 is a perspective view of the filter frame 1 in an assembled state. The configuration of the filter frame 1 will be described in detail with reference to FIGS.
When the filter frame 1 is attached to the outside air filter frame 507, the filter frame 1 constitutes the rear surface portion 11 constituting the rear surface of the filter frame 1 and one side surface of the filter frame 1, and the second side surface portion 509B It has the 1st side part 12 provided so that it may oppose, and the 2nd side part 13 which comprises the other side of the filter frame 1, and is provided so that it may oppose 1st side part 509A.
Further, the filter frame 1 includes a top surface portion 14 constituting the top surface of the filter frame 1, a bottom surface portion 15 constituting the bottom surface of the filter frame 1, and a filter frame in a state where the filter frame 1 is attached to the outside air filter frame 507. 1 and has a front surface portion 16 provided so as to face the outside air filter case 506.

(Rear part 11)
In the state where the filter frame 1 is attached to the outside air filter frame 507, the first side surface portion 12 is connected to the left end side, and the second side surface portion 13 is connected to the right end side. Further, the upper surface portion 14 is connected to the upper end side and the bottom surface portion 15 is connected to the lower end side of the rear surface portion 11 when the filter frame 1 is attached to the outside air filter frame 507.
The rear surface portion 11 is formed with three ribs 11 </ b> A that contact and hold the rear surface side of the filter 2. The ribs 11 </ b> A can hold the filter 2 and suppress deformation of the filter frame 1. The number of ribs 11A is not limited to three. The rib 11A has been described as an example in which the filter frame 1 is provided substantially parallel to the vertical direction in a state where the filter frame 1 is attached to the outside air filter frame 507. For example, the rib 11A is provided substantially parallel to the horizontal direction. May be. An opening 17 is formed between the rear surface portion 11 and the rib 11A so that air flows.

(First side portion 13)
As for the 1st side surface part 13, the rear surface part 11 is connected to the one end side, and the flap 22 holding the shape of the filter frame 1 is connected to the other end side. The first side surface portion 13 and the flap 22 are connected in the vicinity of the center portion, but are not connected at both ends. The unconnected portion is formed with a slit (gap) when the connected portion is folded (see FIG. 9). That is, when the connecting portion between the first side surface portion 13 and the flap 22 is bent, slits 71 and 72 for inserting the ear portion 41 and the ear portion 51 described later are formed between the first side surface portion 13 and the flap 22. It has come to be.

(Second side portion 12)
The second side surface portion 12 has the same configuration as the first side surface portion 13. As for the 2nd side surface part 12, the rear surface part 11 is connected to the one end side, and the flap 21 holding the shape of the filter frame 1 is connected to the other end side. The second side surface portion 12 and the flap 21 are connected in the vicinity of the central portion, but are not connected at both ends. The unconnected portion is formed with a slit (gap) when the connected portion is folded. That is, when the connecting portion between the second side surface portion 12 and the flap 21 is bent, slits 73 and 74 for inserting the ear portion 42 and the ear portion 52 described later are formed between the second side surface portion 12 and the flap 21. It has come to be.

(Upper surface part 14)
In the state where the filter frame 1 is attached to the outside air filter frame 507, the upper surface portion 14 has the ear portion 42 connected to the left end side and the ear portion 41 connected to the right end side. Further, a flap 23 that holds the shape of the filter frame 1 is connected to the upper surface portion 14 at the upstream end side of the air supply air passage in a state where the filter frame 1 is attached to the outside air filter frame 507. A rear surface portion 11 is connected to the end portion on the downstream side of the path.
The flap 23 is bent with respect to the upper surface portion 14 in a state where the connection portion between the upper surface portion 14 and the ear portion 42 is bent and the ear portion 42 is inserted into the slit 73 (see FIG. 10). That is, both end portions of the flap 23 are bent so as to come to the upstream side (upper side in FIG. 10) than the flap 21 and the flap 22, and are sandwiched between the front surface portion 16, the flap 21, and the flap 22.
Further, the flap 23 is formed with slits 81 to 83 into which flaps 31 to 33 described later are inserted. The shape of the filter frame 1 can be maintained by inserting the flaps 31 to 33 into the slits 81 to 83 (see FIG. 12).

The ear part 41 and the ear part 42 are connected to the upper surface part 14 and can support the flap 21 and the flap 22. The ear portion 41 is provided so as to be inserted into the slit 71 and sandwiched between the first side surface portion 12 and the flap 21 in a state where the filter frame 1 is assembled.
The ear portion 42 is provided so as to be inserted into the slit 73 and sandwiched between the second side surface portion 12 and the flap 21 in a state where the filter frame 1 is assembled.

(Bottom 15)
In the state where the filter frame 1 is attached to the outside air filter frame 507, the bottom portion 15 has the ear portion 52 connected to the left end side and the ear portion 51 connected to the right end side. Further, in the state where the filter frame 1 is attached to the outside air filter frame 507, the front surface portion 16 is connected to the bottom surface portion 15 on the upstream end portion side of the air supply air passage, and the downstream end portion of the air supply air passage. The rear surface part 11 is connected to the side.

The ear part 51 and the ear part 52 are connected to the bottom surface part 15 and can support the flap 21 and the flap 22. The ear portion 51 is provided so as to be inserted into the slit 72 and sandwiched between the first side surface portion 12 and the flap 21 in a state where the filter frame 1 is assembled.
Further, the ear portion 52 is provided so as to be inserted into the slit 74 and sandwiched between the second side surface portion 12 and the flap 21 in a state where the filter frame 1 is assembled.

(Front part 16)
In the state in which the filter frame 1 is attached to the outside air filter frame 507, the bottom surface portion 15 is connected to the lower end side, and the flaps 31 to 33 inserted into the slits 81 to 83 are connected to the upper end side. Yes.
The flap 31 is connected to the vicinity of the center portion and the front surface portion 16, and the both end portions of the flap 31 are not connected. The portions of the flap 31 that are not connected to the front surface portion 16 are the arm portions 34 and 35 (see FIG. 11). Similarly, the flap 32 has arm portions 36 and 37, and the flap 33 has arm portions 38 and 39. Accordingly, when the flaps 31 to 33 are inserted into the slits 81 to 83, the flaps 31 to 33 engage with the flap 23, and the filter frame 1 can be assembled reliably.

  Three ribs 16 </ b> A are formed on the front surface portion 16 so as to contact and hold the front surface side of the filter 2 so as to correspond to the ribs 11 </ b> A of the rear surface portion 11. The rib 16 </ b> A can hold the filter 2 and suppress deformation of the filter frame 1. The number of ribs 16A is not limited to three. The rib 16A has been described as an example in which the filter frame 1 is provided substantially parallel to the vertical direction in a state where the filter frame 1 is attached to the outside air filter frame 507. For example, the rib 16A is provided substantially parallel to the horizontal direction. May be. An opening 18 is formed between the front surface portion 16 and the rib 16A so that air flows.

FIG. 9 is a perspective view of the filter frame 1 in an open state (after the folding habit is added). FIG. 10 is a perspective view of the filter frame 1 after the filter frame 1 is bent. FIG. 11 is a perspective view of the filter frame 1 after further bending the filter frame from FIG. 10. 11A shows a state before the bottom surface portion 15 and the front surface portion 16 are bent, and FIG. 11B shows a state after the bottom surface portion 15 and the front surface portion 16 are bent. A method for assembling the filter frame 1 will be described with reference to FIGS.
When the front surface (upstream surface) of the rear surface portion 11 of the filter frame 1 is used as a reference surface, the first side surface portion 12, the second side surface portion 13, the upper surface portion 14, and the bottom surface portion 15 are bent toward the reference surface side. More specifically, as shown in FIG. 9, the bending 202 on the second side surface portion 13 and the bending 201 on the first side surface portion 12 side are performed on the reference surface side, and then the bending 203 and the bottom surface portion 15 on the top surface portion 14 are performed. The bending 204 is performed on the reference surface side (see FIG. 9).

In addition, by bending the 1st side surface part 13 and the flap 22 (bending 202), the slit 71 and the slit 72 are formed between the 1st side surface part 13 and the flap 22 (refer FIG. 9). By bending the second side surface portion 12 and the flap 21 (bending 201), a slit 73 and a slit 74 are formed between the second side surface portion 12 and the flap 21 (see FIG. 9).
Further, the upper surface portion 14 is bent so that the ear portion 41 is inserted into the formed slit 71 and the ear portion 42 is inserted into the slit 73 (bending 203, see FIG. 10). The bottom surface portion 15 is bent so that the ear portion 51 is inserted into the formed slit 72 and the ear portion 52 is inserted into the slit 74 (bending 204, see FIG. 10).
Further, as shown in FIG. 10, the flaps 31 to 33 connected to the front surface portion 16 are bent (see FIG. 10), and the flap 23 connected to the upper surface portion 14 is bent so as to contact the flap 21 and the flap 22. (See FIG. 11A).

Then, when shifting from the state of FIG. 11A to the state of FIG. 11B, the bottom surface portion 15 and the front surface portion 16 are bent (bending 205). That is, the front surface portion 16 is bent toward the rear surface portion 11, the flap 31 is inserted into the slit 81, the flap 32 is inserted into the slit 82, and the flap 33 is inserted into the slit 83.
When the flap 31 is inserted into the slit 81, the arm portion 34 and the arm portion 35 engage with the inner surface of the flap 23. Similarly, when the flap 32 is inserted into the slit 82, the arm portion 36 and the arm portion 37 engage with the inner surface of the flap 23, and when the flap 33 is inserted into the slit 83, the arm portion 38 and Arm 39 engages.
As described above, the filter frame 1 is configured to include the ear portions 41, 42, 51, 52 and the slits 71 to 74, the flaps 31 to 33, and the slits 81 to 83, thereby using an adhesive or a special tool. It can be assembled at least. Thereby, the manufacturing cost of the ventilation apparatus of this Embodiment can be suppressed.

FIG. 12 is an explanatory diagram of a return force (back spring) generated by bending the filter frame 1 in a state where the filter frame 1 is assembled.
When the above-described folding 201 to 205 is performed on the members constituting the filter frame 1, a back spring that tries to return to the unfolded state occurs. That is, the return force 211, the return force 212, the return force 213, and the return force 214 are generated in the filter frame 1.

  Here, the return force 213 is a force generated by the back spring of the upper surface portion 14 and the flap 23. The return force 214 is a force generated by the back springs of the bottom surface portion 15, the front surface portion 16, the flap 31, the flap 32, and the flap 33. The return force 212 is a force generated by the first side surface portion 13 and the back spring of the flap 22. Further, the return force 211 is a force generated by the second side surface portion 12 and the back spring of the flap 21.

  First, for the return force 213 and the return force 214, the force of engagement between the arms 31 to 39 provided in the flap 31, the flap 32, and the flap 33 and the inner surface of the flap 23 is applied, and the filter frame 1 is closed. It is supposed to be kept.

In addition, for the return force 212 and the return force 211, the ear portion 41, the ear portion 42, the ear portion 51, and the ear portion 52 support the flap 21 and the flap 22, thereby serving as a stopper and being in a closed state. Kept.
More specifically, the ear portion 41 is provided so as to be inserted into the slit 71 and sandwiched between the first side surface portion 12 and the flap 21 in a state where the filter frame 1 is assembled. Thereby, even if force 211,221 (back spring) which tries to return from the state in which filter frame 1 was assembled to the state in which it was not assembled of FIG. 22 can be held in the assembled position.
The ear portion 42 is provided so as to be inserted into the slit 73 and sandwiched between the second side surface portion 12 and the flap 21 in a state where the filter frame 1 is assembled. Thereby, even if the force 211,221 (back spring) which tries to return from the state in which the filter frame 1 is assembled to the unassembled state in FIG. 21 can be held in the assembled position.

The ear portion 51 is provided so as to be inserted into the slit 72 and sandwiched between the first side surface portion 12 and the flap 21 in a state where the filter frame 1 is assembled. Thereby, even if the force 211,221 (back spring) which tries to return from the state which assembled the filter frame 1 to the unassembled state of FIG. 22 can be held in the assembled position.
Further, the ear portion 52 is provided so as to be inserted into the slit 74 and sandwiched between the second side surface portion 12 and the flap 21 in a state where the filter frame 1 is assembled. Thereby, even if the force 211,221 (back spring) which tries to return from the state in which the filter frame 1 is assembled to the unassembled state in FIG. 21 can be held in the assembled position.

  In addition, since the ear | edge part 41 and the ear | edge part 42 are provided between the front-surface part 16 and the rear surface part 11, the filter frame 1 deform | transforms when the force of the direction toward the rear surface part 11 from the upper surface part 14 is applied, for example. It is also possible to suppress this. Since the ear portion 51 and the ear portion 52 are provided between the front surface portion 16 and the rear surface portion 11, for example, when a force in a direction from the upper surface portion 14 toward the rear surface portion 11 is applied, the filter frame 1 is deformed. It is also possible to suppress this.

[Air supply and exhaust flow]
Outside air (air supply) introduced from the outside air duct connection port 523 passes through the mesh filter 302. Here, coarse dust such as insects is removed. Coarse dust such as insects remains on the mesh filter 302 as it is, or falls by its own weight and is stored in the insect receiver 509E.
Fine dust collection such as pollen that has passed through the mesh filter 302 is collected by the outside air cleaning filter 303 and the filter 2.
Thus, the supply air that has passed through the mesh filter 302, the outside air cleaning filter 303, and the filter 2 flows into the heat exchange element portion 571 and exchanges heat with the exhaust gas, and then is discharged from the supply air duct connection port 524.
The indoor air (exhaust gas) that has flowed into the main body 500 after removing coarse dust or the like by the exhaust filter 502 flows into the heat exchange element portion 571 and exchanges heat with the supply air, and then exhausts through the second blower 574. It is discharged from the duct connection port 522.

[Effect of filter frame 1 according to the embodiment]
In the filter frame according to the embodiment, the filter frame 1 is a thin plate material. For example, the filter frame 1 can be obtained by cutting with a Thomson mold or a cutter. The filter frame 1 for holding the filter 2 can be assembled by bending the filter frame 1 that is a thin plate material. For this reason, the manufacturing cost of the ventilator can be reduced correspondingly because a molding machine and a dedicated mold for producing the filter frame 1 are not required.

  Since the filter frame 1 according to the embodiment does not obtain the filter frame 1 by injection molding, it is not necessary to consider ensuring the minimum thickness dimension in the injection molding. The degree of freedom is improved.

  Since the filter frame 1 according to the embodiment does not require a dedicated mold, the filter frame 1 can be relatively easily adapted to the manufacture of filters 2 of various sizes in a small lot.

  The filter frame 1 according to the embodiment includes ear portions 41, 42, 51, 52 and slits 71 to 74, flaps 31 to 33, and slits 81 to 83. For this reason, a fixing material for holding the closed state by an adhesive or the like is not necessary, and the filter frame 1 which is a thin plate material can be assembled by being folded, and the assemblability is high.

  In the filter frame 1 according to the embodiment, since the engagement between the flaps 31 to 33 of the filter frame 1 and the slits 81 to 83 is a mechanical engagement by burr, it is reliable even in an environment where temperature and humidity change. High agreement can be realized.

  DESCRIPTION OF SYMBOLS 1 Filter frame, 2 Filter, 11 Rear surface part, 11A rib (1st rib), 12 1st side surface part, 13 2nd side surface part, 14 Upper surface part, 15 Bottom surface part, 16 Front surface part, 16A Rib (2nd rib) , 17, 18 Opening, 21 Flap (2nd flap), 22 Flap (1st flap), 23 Flap (3rd flap), 31-33 Flap (4th flap), 34-39 Arm part, 41 Ear part ( First ear), 42 Ear (second ear), 51 Ear (third ear), 52 Ear (fourth ear), 71 Slit (first slit), 72 Slit (second slit) ), 73 Slit (third slit), 74 Slit (fourth slit), 81-83 Slit (opening), 201-205 Bending, 211-214 Return force, 301 Outside air cleaning filter unit , 302 mesh filter, 303 outside air cleaning filter, 304A, 304B insertion groove, 500 body, 501 panel, 502 exhaust filter, 504 fix piece, 505 handle, 506 outside air filter case, 507 outside air filter frame, 508 claw, 509 mesh Filter frame, 509A first side, 509B second side, 509C beam, 509D base, 509E insect catch, 509F, 509G pool, 509H rib, 510 outside air filter holder, 511 mesh filter, 522 exhaust duct connection port, 523 Outside air duct connection port, 524 Supply air duct connection port, 571 Heat exchange element part, 572 First blower, 572A Fan, 572B Electric motor, 574 Second blower, 574A Fa , 574B electric motor, 591 receiving part.

Claims (8)

In the filter frame that holds the filter to remove dust in the fluid and is installed in the ventilation device,
In the assembled state, a flat plate-like member formed with an open portion that exposes the upstream side surface and the downstream side surface of the filter is three-dimensionally assembled to accommodate the filter by bending it into a box shape. Filter frame. In the assembled state,
A rear surface portion that is opposed to the downstream side surface of the filter and has an open portion that exposes the downstream side surface of the filter; and
A flat bottom surface portion facing the lower end side of the filter and connected to the lower end side of the rear surface portion,
A flat upper surface portion facing the upper end side of the filter and connected to the upper end side of the rear surface portion,
A flat plate-like first side surface portion that faces one end side of the filter in the width direction of the fluid flow direction and is connected to one end side of the rear surface portion;
A plate-like second side surface portion facing the other end side of the filter in the width direction of the fluid flow direction and connected to the other end side of the rear surface portion;
A flat front portion connected to the bottom surface portion opposite to the side to which the rear surface portion is connected, wherein an open portion that faces the upstream side surface of the filter and exposes the upstream side surface of the filter is formed. ,
The filter frame according to claim 1, comprising: A first flap connected to the first side surface opposite to the side to which the rear surface is connected;
A second flap connected to the second side surface portion opposite to the side to which the rear surface portion is connected;
A first ear connected to one end of the upper surface on the first flap side, and a second ear connected to the other end of the upper surface on the second flap;
A third ear portion connected to one end side of the bottom surface portion on the first flap side, and a fourth ear portion connected to the other end side of the bottom surface portion on the second flap side;
Have
Between the first flap and the first side surface portion,
A first slit into which the first ear is inserted and a second slit into which the third ear is inserted;
Between the second flap and the second side surface portion,
The filter frame according to claim 2, wherein a third slit into which the second ear portion is inserted and a fourth slit into which the fourth ear portion is inserted are formed. A third flap connected to the upper surface portion opposite to the side to which the rear surface portion is connected and having an opening;
A fourth flap connected to the front portion on the opposite side to the side to which the bottom portion is connected, and inserted into the opening of the third flap;
The filter frame according to claim 2 or 3, characterized by comprising: The third flap is
The filter frame according to claim 4, wherein the filter frame is sandwiched between the first flap and the second flap and the front portion. The fourth flap is
The filter frame according to claim 4 or 5, wherein an arm portion that engages with the third flap is formed in a state of being inserted into the opening of the third flap. In the front part,
In the assembled state, a first rib for holding the filter is formed from the upper surface side to the bottom surface side,
On the rear surface,
The filter frame according to any one of claims 2 to 6, wherein a second rib is formed to hold the filter from the upper surface side to the bottom surface side in the assembled state. A ventilation apparatus comprising the filter frame according to any one of claims 1 to 7.

Images