JP7053534B2 - Outside air processing equipment - Google Patents

Description

The present invention relates to an outside air processing device that purifies air supply.

The need for ventilation is increasing due to the improvement of airtightness of buildings, and it is mandatory to install a 24-hour ventilation system in houses. In recent years, it is necessary to remove fine particulate matter and pollen when supplying outside air indoors due to the influence of the arrival of fine particulate matter represented by PM2.5 and the arrival of pollen such as sugi and cypress. Is required. In addition, there is a possibility that insects and the like may be inhaled together with the outside air in the air supply. Therefore, it is also required to remove insects and the like from the outside air supplied to the room to prevent the invasion of insects into the room.

As one of the methods for removing fine particulate matter and insects, an outside air treatment device may be installed in front of the ventilation device. As disclosed in Patent Document 1, the outside air treatment device is equipped with a net-like filter for the purpose of removing insects and the like, and a filter or an electrostatic precipitator for the purpose of removing fine particulate matter. It will be installed.

Japanese Patent No. 4670441

However, if the airtightness between the flow path in which the filter is installed and the filter is insufficient, insects or the like may invade the room through the flow path and the filter.

The present invention has been made in view of the above, and an object of the present invention is to obtain an outside air treatment apparatus capable of ensuring airtightness between a flow path and a filter.

In order to solve the above-mentioned problems and achieve the object, the present invention has a first tapered portion whose width becomes narrower toward the first direction and a second direction opposite to the first direction. A frame portion having a second tapered portion provided on the second direction side with respect to the first tapered portion, a net portion provided inside the frame portion, and a mesh portion provided inside the frame portion, as the width becomes narrower toward A filter having a At the same time, the lid portion in which the presser portion into which the second tapered portion is fitted is formed, the first elastic portion sandwiched between the accommodating portion and the first tapered portion, and the presser portion and the second tapered portion. It is provided with a second elastic portion sandwiched between the two. In the filter, the width of the first tapered portion is wider than that of the second tapered portion at the connecting portion between the first tapered portion and the second tapered portion, and the first tapered portion and the second tapered portion at the connecting portion. It has a connection part to connect with the part. The lid portion abuts on the connection portion with the opening closed.

According to the outside air processing apparatus according to the present invention, there is an effect that the airtightness between the flow path and the filter can be ensured.

Sectional drawing which showed the schematic structure of the ventilation system using the outside air processing apparatus which concerns on Embodiment 1 of this invention. A perspective view of the outside air treatment device according to the first embodiment as viewed from the lid side. It is a perspective view which looked at the outside air processing apparatus which concerns on Embodiment 1 from the opening side, and is the figure which shows the state which the lid part was removed. The figure which showed the other installation state of the outside air processing apparatus which concerns on Embodiment 1. Sectional drawing of the outside air processing apparatus which concerns on Embodiment 1. Perspective view of the duct connection portion in the first embodiment Perspective view of the accommodating portion according to the first embodiment Perspective view of the duct connection portion fixing component in the first embodiment Sectional drawing of duct connection part fixing part in Embodiment 1. Sectional drawing of the accommodating part in Embodiment 1. Perspective view of the lid portion in the first embodiment Sectional drawing of the lid part in Embodiment 1. Perspective view of the filter in the first embodiment as viewed from the upstream side. Front view of the filter according to the first embodiment Perspective view of the filter in the first embodiment as viewed from the downstream side. It is sectional drawing along the XVI-XVI line shown in FIG. 1, and is the figure which shows the state which installed the outside air processing apparatus with the opening facing upward.

Hereinafter, the outside air treatment apparatus according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

Embodiment 1.
FIG. 1 is a cross-sectional view showing a schematic configuration of a ventilation system using the outside air treatment device according to the first embodiment of the present invention. The ventilation system 20 includes an outdoor air supply port 1, an indoor air supply port 12, an outside air treatment device 5, a ventilation device 21, and a duct 3. The outdoor air supply port 1 is attached to the outer wall 2 of the building. The indoor air supply port 12 is attached to the indoor ceiling 4. The duct 3 is a tubular member connected to the outdoor air supply port 1 and the indoor air supply port 12, and allows the outdoor and indoor spaces to communicate with each other. The outside air treatment device 5 and the ventilation device 21 are connected between the ducts 3. The outside air treatment device 5 and the ventilation device 21 are arranged side by side in this order from the outdoor side. When the ventilation device 21 is operated, an air flow is generated from the outdoor air supply port 1 to the indoor air supply port 12, and the outside air 8 taken into the outdoor air supply port 1 supplies air from the indoor air supply port 12 indoors. Will be done. The outside air 8 supplied indoors passes through the outside air processing device 5 and the ventilation device 21 in this order.

The outside air processing device 5 removes fine particles and insects taken in together with the outside air 8 through the outdoor air supply port 1. The fine particles are, for example, PM2.5 or pollen. Next, the detailed configuration of the outside air processing device 5 will be described.

The outside air treatment device 5 is equipped with a net filter 10 for collecting insects and the like, and a pleated filter 11 for removing fine particulate matter. The outside air 8 is purified by the net filter 10 and the pleated filter 11 to become clean air 9, which is supplied to the indoor space from the indoor air supply port 12.

FIG. 2 is a perspective view of the outside air treatment device according to the first embodiment as viewed from the lid side. FIG. 3 is a perspective view of the outside air processing device according to the first embodiment as viewed from the opening side, and is a diagram showing a state in which the lid portion is removed. The outside air processing device 5 includes an accommodating portion 5a. The accommodating portion 5a is a box body having an opening 5i formed on the first surface 5h.

Returning to FIG. 1, when the outside air processing device 5 is installed on the ceiling 4, the outside air processing device 5 is installed in a posture in which the first surface 5h of the accommodating portion 5a faces downward. The outside air treatment device 5 is installed by suspending it from the ceiling 4 with anchor bolts or the like. An inspection port 4a that can be opened and closed is installed on the ceiling 4 vertically below the accommodating portion 5a to enable maintenance of the product.

FIG. 4 is a diagram showing another installation state of the outside air treatment device according to the first embodiment. As shown in FIG. 4, the product may be fixed to the field edge 14 with a wood screw and the outside air treatment device 5 may be installed on the ceiling 4. When the outside air processing device 5 is installed on the ceiling, the design panel 13 may be attached to the opening 5i of the accommodating portion 5a instead of the inspection port 4a.

The outside air processing device 5 may be installed under the floor. When the outside air treatment device 5 is installed under the floor, it is necessary to perform maintenance through the inspection port provided on the floor surface. Therefore, when the outside air treatment device 5 is installed under the floor, the outside air treatment device 5 is installed with the first surface 5h of the accommodating portion 5a facing vertically upward. As a result, it becomes possible to easily access the opening 5i formed in the first surface 5h through the inspection port formed in the floor surface, and the maintainability is improved.

As shown in FIGS. 2 and 3, the accommodating portion 5a is provided with an outdoor side duct connecting portion 7a to which the duct 3 from which the outside air 8 is taken is connected. The accommodating portion 5a is provided with an indoor duct connecting portion 7b to which a duct 3 through which the clean air 9 cleaned by the net filter 10 and the pleated filter 11 passes is connected. In the following description, the outdoor side duct connection portion 7a and the indoor side duct connection portion 7b are not distinguished and are also referred to as a duct connection portion 7.

The outside air processing device 5 includes a duct connection portion fixing component 5c that serves as a fixing portion for fixing the duct connection portion 7. The outside air processing device 5 includes a removable lid portion 6 that closes the opening 5i of the accommodating portion 5a. The space surrounded by the accommodating portion 5a and the lid portion 6 serves as a flow path through which the outside air 8 or the clean air 9 passes. The accommodating portion 5a and the lid portion 6 are made of styrofoam having high heat insulating performance because there is a concern that dew condensation may occur when the outside air 8 taken in is low and the indoor temperature is high.

The duct connecting portion 7 is a resin molded product because it needs to have strength for connecting to the duct 3. The lid portion 6 can be fixed to the accommodating portion 5a and removed from the accommodating portion 5a by rotating the main body cover fixing component 5e provided in the accommodating portion 5a.

FIG. 5 is a cross-sectional view of the outside air treatment device according to the first embodiment. FIG. 6 is a perspective view of the duct connection portion according to the first embodiment. FIG. 7 is a perspective view of the accommodating portion according to the first embodiment. FIG. 8 is a perspective view of the duct connection portion fixing component according to the first embodiment. FIG. 9 is a cross-sectional view of the duct connection portion fixing component according to the first embodiment.

As shown in FIG. 6, the duct connecting portion 7 has a cylindrical tubular portion 7d and a flange portion 7c formed at one end of the tubular portion 7d. The flange portion 7c has an annular shape when viewed along the central axis of the tubular portion 7d.

As shown in FIG. 5, the duct connecting portion 7 is attached to the duct connecting surface 5j of the accommodating portion 5a, which is different from the first surface 5h. As shown in FIG. 7, a receiving surface 5k in contact with the tubular portion 7d of the duct connecting portion 7 is formed on the duct connecting surface 5j of the accommodating portion 5a. The duct connecting portion 7 is sandwiched and fixed between the receiving surface 5k and the duct connecting portion fixing component 5c.

The receiving surface 5k is formed with a duct connecting portion fitting groove 5b that serves as an insertion receiving portion into which a part of the flange portion 7c of the duct connecting portion 7 is inserted. Further, as shown in FIG. 9, the duct connection portion fitting groove in which the portion of the flange portion 7c of the duct connection portion 7 that is not inserted into the duct connection portion fitting groove 5b is inserted into the duct connection portion fixing component 5c. 5d is formed.

With the duct connection portion 7 sandwiched between the receiving surface 5k and the duct connection portion fixing component 5c, the flange portion 7c is inserted into the duct connection portion fitting groove 5b and the duct connection portion fitting groove 5d to form a duct. The connection portion 7 can be prevented from coming off. In the first embodiment, the semicircular portion of the flange portion 7c is inserted into the duct connection portion fitting groove 5b, and the remaining semicircular portion is inserted into the duct connection portion fitting groove 5d. Airtightness is ensured by cushioning the mating portion between the accommodating portion 5a and the duct connecting portion fixing component 5c.

In the ventilation system 20, the humidity of the taken-in outside air 8 may be high. Condensed water may be generated when the high humidity outside air 8 flows into the outside air treatment device 5. The outside air treatment device 5 needs a structure capable of retaining condensed water in order to prevent the condensed water from leaking into the room.

FIG. 10 is a cross-sectional view of the accommodating portion according to the first embodiment. As shown in FIG. 10, the surface that becomes the bottom surface when the opening 5i is directed upward, that is, the inner side surface of the accommodating portion 5a, is shifted to the opening 5i side from the first facing surface 5f facing the opening 5i. By forming the receiving surface 5k, a water retaining portion 5g, which is a first water receiving portion capable of retaining condensed water, is formed on the first facing surface 5f. Since the accommodating portion 5a is made of styrofoam, it is difficult for water to pass through, and leakage of condensed water can be prevented. When the outside air treatment device 5 is installed with the opening 5i facing upward, that is, when it is installed under the floor, leakage of condensed water can be prevented.

FIG. 11 is a perspective view of the lid portion according to the first embodiment. FIG. 12 is a cross-sectional view of the lid portion according to the first embodiment. FIG. 11 shows a perspective view of the lid portion 6 as seen from the side of the second facing surface 6d facing the first facing surface 5f of the accommodating portion 5a.

As shown in FIGS. 11 and 12, ribs 6a projecting toward the first facing surface 5f are provided around the second facing surface 6d of the lid portion 6. A water retaining portion 6b, which is a second water receiving portion surrounded by the ribs 6a, is formed on the second facing surface 6d of the lid portion 6. Since the lid portion 6 is made of styrofoam, it is difficult for water to pass through and leakage of condensed water can be prevented. When the outside air treatment device 5 is installed with the opening 5i facing downward, that is, when it is installed on the ceiling 4, leakage of condensed water can be prevented. The height of the rib 6a is set to a height at which the assumed condensed water can be sufficiently stored.

In this way, when the outside air treatment device 5 is installed on the ceiling 4, the lid 6 retains the condensed water, and when the outside air treatment device 5 is installed under the floor, the accommodating portion 5a holds the condensed water. Since water can be retained, leakage of condensed water can be prevented regardless of the installation location of the outside air treatment device 5.

FIG. 13 is a perspective view of the filter according to the first embodiment as viewed from the upstream side. FIG. 14 is a front view of the filter according to the first embodiment. FIG. 15 is a perspective view of the filter according to the first embodiment as viewed from the downstream side. FIG. 16 is a cross-sectional view taken along the line XVI-XVI shown in FIG. 1 and is a diagram showing a state in which the outside air treatment device is installed with the opening facing upward. The terms upstream and downstream indicate upstream and downstream in the flow direction of the outside air from the outdoor air supply port 1 to the indoor air supply port 12.

The net filter 10, which is a filter provided on the upstream side of the pleated filter 11, has a frame portion 10a of a resin molded product and a net unit 10b provided inside the frame portion 10a. The net filter 10 is manufactured by insert molding. The net unit 10b is provided in a shape that is convex in the downstream direction when viewed from the side and in the direction perpendicular to the flow direction of the outside air 8 in the accommodating unit 5a. More specifically, it has a trapezoidal shape when viewed from the side and in the direction perpendicular to the flow direction of the outside air 8 in the accommodating portion 5a. With this shape, the area of the net unit 10b can be widened, and the pressure loss can be reduced. In the following description, viewing from the side and in the direction perpendicular to the flow direction of the outside air 8 in the accommodating portion 5a is simply referred to as side view.

In the frame unit 10a, with the net filter 10 accommodated in the accommodating unit 5a, the net filter 10 fell from the net unit 10b to a portion on the first facing surface 5f side and a portion on the second facing surface 6d side. A receiving unit 10c that receives insects is formed. Since the receiving portion 10c is formed on both the portion on the first facing surface 5f side and the portion on the second facing surface 6d side, insects and the like are second regardless of the installation location of the outside air treatment device 5. It is possible to prevent the surface from falling to the facing surface 5f of the first surface or the second facing surface 6d.

As shown in FIG. 14, the frame portion 10a has a first tapered portion 31 whose width becomes narrower toward the first direction, which is the direction toward the first facing surface 5f while being housed in the accommodating portion 5a. Have. The frame portion 10a has a second taper whose width becomes narrower toward a second direction opposite to the first direction, that is, toward the second facing surface 6d while being housed in the housing portion 5a. It has a part 32. The second tapered portion 32 is provided on the second direction side with respect to the first tapered portion 31.

In the connecting portion between the first tapered portion 31 and the second tapered portion 32, the first tapered portion 31 is wider than the width of the second tapered portion 32. The frame portion 10a has a connecting portion 33 for connecting the first tapered portion 31 and the second tapered portion 32. The frame portion 10a has a hexagonal shape with a step at a part of the corner portion at the connecting portion 33 portion. The frame portion 10a is formed with an airtight rib 10e that projects outward over the entire circumference of the outer circumference.

As shown in FIGS. 7 and 16, the accommodating portion 5a is formed with an insertion portion 34 into which the frame portion 10a is inserted along the first direction and the first tapered portion 31 is fitted. Similar to the first tapered portion 31, the width of the insertion portion 34 also becomes narrower toward the first direction.

The insertion portion 34 is provided with a first elastic portion 41 sandwiched between the insertion portion 34 and the first tapered portion 31. The first elastic portion 41 may be crushed by the insertion portion 34 and the first taper portion 31 with elastic force, and may be brought into close contact with the insertion portion 34 and the first taper portion 31, for example. It is rubber or sponge. The airtight rib 10e formed on the frame portion 10a abuts on the first elastic portion 41.

As shown in FIGS. 11 and 16, the lid portion 6 is formed with a pressing portion 35 into which the second tapered portion 32 is fitted while the opening 5i of the accommodating portion 5a is closed. Similar to the second tapered portion 32, the presser portion 35 also becomes narrower in the second direction. The lid portion 6 is formed with an abutting portion 6c that abuts on the connecting portion 33 of the net filter 10 with the opening 5i of the accommodating portion 5a closed.

The pressing portion 35 is provided with a second elastic portion 42 sandwiched between the pressing portion 35 and the second tapered portion 32. The second elastic portion 42 may be crushed by the pressing portion 35 and the second tapered portion 32 with elastic force and may be brought into close contact with the pressing portion 35 and the second tapered portion 32, for example, rubber. Or a sponge. The airtight rib 10e formed on the frame portion 10a abuts on the second elastic portion 42.

Since the net filter 10 can be inserted into the accommodating portion 5a from the narrower side of the first tapered portion 31, it is possible to improve the insertability of the net filter 10 during maintenance.

Further, since the abutting portion 6c formed on the lid portion 6 abuts on the connecting portion 33 of the net filter 10, the frame portion 10a is pressed in the first direction, and the first tapered portion 31 and the insertion portion are inserted. The first elastic portion 41 is crushed with the 34. Therefore, the airtightness between the first tapered portion 31 and the insertion portion 34 can be improved only by closing the opening 5i of the accommodating portion 5a with the lid portion 6. Further, the airtight rib 10e formed on the outer peripheral surface of the frame portion 10a bites into the first elastic portion 41, so that the airtightness can be further improved. Further, since the dimensional error of the accommodating portion 5a and the frame portion 10a can be absorbed by the amount of deformation of the first elastic portion 41, the airtightness is stably improved regardless of the dimensional error of the accommodating portion 5a and the frame portion 10a. be able to.

Further, when the opening 5i of the accommodating portion 5a is closed by the lid portion 6, the second tapered portion 32 of the net filter 10 fits into the pressing portion 35 from the narrower side, so that a part of the lid portion 6 is a frame portion. It is hard to get caught in 10a. Therefore, the workability when closing the opening 5i of the accommodating portion 5a with the lid portion 6 is improved. Further, since the second tapered portion 32 is formed in the net filter 10 in accordance with the shape of the presser portion 35 whose width becomes narrower toward the second direction, the size of the net filter 10 enters the region between the presser portions 35. Even if the net unit 10b is formed, the airtightness between the presser unit 35 and the net filter 10 does not decrease. As a result, the area of the region of the net unit 10b, that is, the area of the region through which air can pass can be secured, and the pressure loss can be suppressed.

Further, since the second elastic portion 42 is crushed by the pressing portion 35 and the second tapered portion 32, the airtightness between the pressing portion 35 and the second tapered portion 32 can be improved. Further, the airtight rib 10e formed on the outer peripheral surface of the frame portion 10a bites into the second elastic portion 42, so that the airtightness can be further improved. Further, since the dimensional error of the lid portion 6 and the frame portion 10a can be absorbed by the amount of deformation of the first elastic portion 41, the airtightness is stably improved regardless of the dimensional error of the lid portion 6 and the frame portion 10a. be able to.

Further, since the water retention portions 5g and 6b are formed in the accommodating portion 5a and the lid portion 6, respectively, it is either the case where the outside air treatment device 5 is installed on the ceiling 4 or the case where it is installed under the floor. However, the generated condensed water can be stored in the water retention portions 5g and 6b to prevent leakage to the outside.

The ventilation device 21 of the present embodiment also includes a ventilation device 21 with a total heat exchanger that exchanges heat between the air taken indoors and the air discharged outdoors. Further, in the configuration of the ventilation system 20, the order may be changed from the above configuration, and the ventilation device 21 may be installed on the upstream side and the outside air treatment device 5 may be installed on the downstream side.

The method for removing fine particulate matter is not limited to the pleated filter 11, but may be configured by an electrostatic precipitator or other physically removable filter. The electrostatic precipitator consists of a charged part that charges the fine particulate matter and a dust collector that collects the charged fine particulate matter, and the fine particulate matter charged by the charged part collects dust by the Coulomb force. Captured by the department.

Further, the shape of the net portion 10b of the net filter 10 in the side view is not limited to the trapezoidal shape, but may be a square shape or a rectangular shape.

The configuration shown in the above-described embodiment shows an example of the content of the present invention, can be combined with another known technique, and is one of the configurations as long as it does not deviate from the gist of the present invention. It is also possible to omit or change the part.

1 Outdoor air supply port, 2 outer wall, 3 duct, 4 ceiling, 4a inspection port, 5 outside air treatment device, 5a accommodating part, 5b, 5d duct connection part fitting groove, 5c duct connection part fixing part, 5e main body cover fixing part 5f 1st facing surface, 5g water holding part, 5h 1st surface, 5i opening, 5j duct connecting surface, 5k receiving surface, 6 lid part, 6a rib, 6b water holding part, 6c contact part, 6d second facing Surface, 7 duct connection, 7a outdoor duct connection, 7b indoor duct connection, 7c flange, 7d tubular, 8 outside air, 9 clean air, 10 net filter, 10a frame, 10b net, 10c Receiving part, 10e airtight rib, 11 pleated filter, 12 indoor air supply port, 13 design panel, 14 field edge, 20 ventilation system, 21 ventilation device, 31 first taper part, 32 second taper part, 33 connection part , 34 Insertion part, 35 Presser part, 41 First elastic part, 42 Second elastic part.

Claims (3)

With respect to the first tapered portion whose width becomes narrower toward the first direction and the width becomes narrower toward the second direction opposite to the first direction. A filter having a frame portion having a second tapered portion provided on the second direction side, and a net unit provided inside the frame portion.
An accommodating portion in which an opening is formed on the first surface and an insertion portion into which the filter is inserted along the first direction to fit the first tapered portion is formed.
A lid portion that closes the opening and has a holding portion into which the second tapered portion is fitted, and a lid portion.
A first elastic portion sandwiched between the accommodating portion and the first tapered portion,
A second elastic portion sandwiched between the holding portion and the second tapered portion is provided.
In the filter, the width of the first tapered portion is wider than that of the second tapered portion at the connecting portion between the first tapered portion and the second tapered portion, and the first tapered portion is formed at the connecting portion. It has a connecting portion for connecting the tapered portion and the second tapered portion.
The outside air processing device, wherein the lid portion comes into contact with the connection portion in a state where the opening is closed. The outside air processing apparatus according to claim 1, wherein a rib protruding toward the accommodating portion or the holding portion is formed on the outer peripheral surface of the frame portion. The net unit is provided in a shape that is convex to one side from the frame unit when viewed perpendicularly to the first direction.
The outside air processing apparatus according to claim 1 or 2, wherein the frame portion has a receiving portion for receiving insects dropped from the net unit.

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