JP7337024B2 - Outside air treatment equipment and ventilation system - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to an outdoor air treatment device that purifies outdoor air taken indoors and a ventilation system that includes the outdoor air treatment device.

The need for ventilation has increased due to the improvement in the airtightness of buildings, and the installation of a 24-hour ventilation system has become mandatory in houses. In addition, in recent years, due to the influence of flying fine particulate matter represented by PM (Particulate Matter) 2.5 and pollen of cedar, cypress, etc., when supplying outside air indoors, fine particulate matter and pollen are required to be removed. In addition, when outside air is supplied indoors, there is a possibility that insects, dust, etc. will be sucked in along with the outside air. Therefore, it is also required to remove insects, dust, etc. when the outside air is supplied indoors.

As one method for removing microparticulate matter, pollen, insects, dust, etc., there is a case where an outside air processing device is installed. As disclosed in Patent Document 1, the outside air processing device is equipped with a filter or an electrostatic precipitator for the purpose of removing fine particulate matter and pollen, or is equipped with an electric dust collector for the purpose of removing insects, dust, etc. Equipped with a net filter.

Ambient air treatment devices may ingest fog, for example, if fog is present. When fog is sucked into the outside air treatment device, the fog may adhere to the filter and condensed water may be generated. Therefore, the outside air processing device requires a structure for retaining the condensed water.

The outside air processing device disclosed in Patent Document 1 includes a box-shaped housing that houses a filter and has an opening formed in the lower wall, and a plate-shaped housing that can be opened and closed and closes the opening when closed. and a lid. In the outside air treatment device disclosed in Patent Document 1, the housing and the lid are butted together to form a recess for retaining condensed water between the lid and the side wall of the housing extending upward from the peripheral edge of the lid. formed.

Japanese Patent No. 4670441

In the outside air processing device disclosed in Patent Document 1, since the recess is formed between the lid and the housing, condensation occurs through a gap between the butting surfaces of the housing and the lid due to dimensional errors, assembly errors, and the like. Water may leak out of the device.

In the outside air processing device disclosed in Patent Document 1, when the condensed water does not leak out of the apparatus from the abutting surfaces of the housing and the lid, the condensed water is accumulated on the lid. When the operator removes the lid from the housing while the condensed water is accumulated on the lid, the condensed water is fluid and can move freely on the lid. In the outside air processing device disclosed in Patent Document 1, the removed lid portion is not always horizontal, so the condensed water will spill out if there is no means for suppressing the movement of the condensed water. Further, in the outside air processing device disclosed in Patent Document 1, the lid portion itself does not have a concave portion for retaining condensed water, so the condensed water tends to spill out. As a result, there is a risk that the floor surface below the outside air processing device will be soiled.

The present disclosure has been made in view of the above, and is capable of suppressing the leakage of water to the outside of the apparatus with the housing and the lid section assembled, and the lid section with the lid section removed from the housing. To obtain an outside air processing device which makes it difficult to spill water collected on a part.

In order to solve the above-described problems and achieve the object, an outdoor air processing device according to the present disclosure is an outdoor air processing device that cleans the outdoor air taken from the outdoors to the indoors, and is formed in a box shape and has a lower wall portion. a housing having an opening formed in it; a lid that can be opened and closed and closes the opening when closed; and a filter that is housed inside the housing and collects moisture contained in the outside air. Prepare. The lid portion is formed with a water receiving portion which is formed in an upwardly open concave shape to receive water flowing down from the filter. The water receiving portion is provided with a suppressing portion that suppresses movement of moisture. A plurality of filters are provided at intervals in the flow direction of the outside air. The water receiving portion is formed with a plurality of water retaining portions that are arranged below the respective filters to retain water, and a communication portion that communicates the adjacent water retaining portions with each other. A suppressing portion is provided in the communicating portion.

In the external air processing device according to the present disclosure, it is possible to suppress the leakage of moisture to the outside of the device when the housing and the lid are assembled, and the moisture accumulated on the lid when the lid is removed from the housing. It has the effect of making it difficult to spill water.

1 is a schematic configuration diagram showing a ventilation system provided with an outside air processing device according to Embodiment 1. FIG. BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which showed the external air processing apparatus concerning Embodiment 1 FIG. 3 is a perspective view showing the outside air processing device according to the first embodiment, showing a state in which the lid portion is removed from the outside air processing device shown in FIG. 2; Sectional view of the outside air processing device according to the first embodiment The perspective view which showed the cover part in Embodiment 1. The top view which showed the cover part in Embodiment 1. FIG. 7 is a cross-sectional view taken along line II shown in FIG. 6, showing the center of the lid portion and the position of the center of gravity of the condensed water in the horizontal state of the lid portion; FIG. 7 is a cross-sectional view taken along line II shown in FIG. 6, showing the center of the lid and the center of gravity of the condensed water in the tilted state of the lid. FIG. 7 is a cross-sectional view taken along line II shown in FIG. 6, showing the center of the lid and the center of gravity of the condensed water in a state in which the lid is tilted deeper than in the tilted state shown in FIG. Illustrated Plan view showing a lid without ribs FIG. 10 is a cross-sectional view taken along the line II-II shown in FIG. 10, showing the center of the lid and the center of gravity of the condensed water in the horizontal state of the lid. FIG. 11 is a cross-sectional view taken along the line II-II shown in FIG. 10, showing the center of the lid and the center of gravity of the condensed water in the tilted state of the lid. FIG. 10 is a cross-sectional view along line II-II shown in FIG. 10, showing the center of the lid and the center of gravity of the condensed water in a state in which the lid is tilted deeper than the tilted state shown in FIG. Illustrated The figure which showed the other installation state of the outside air processing apparatus concerning Embodiment 1. The perspective view which showed the lid part of the external air processing apparatus concerning Embodiment 2. The top view which showed the cover part in Embodiment 2 FIG. 16 is a cross-sectional view taken along line III-III shown in FIG. 16, showing the center of the lid and the center of gravity of the condensed water in the horizontal state of the lid. FIG. 16 is a cross-sectional view along line III-III shown in FIG. 16, showing the center of the lid and the center of gravity of the condensed water when the lid is tilted. FIG. 18 is a cross-sectional view along line III-III shown in FIG. 16, showing the center of the lid and the center of gravity of the condensed water when the lid is tilted deeper than the tilted state shown in FIG. Illustrated Cross-sectional view of the outside air processing device according to the third embodiment The top view which showed the cover part in Embodiment 3

An outside air processing device and a ventilation system according to embodiments will be described in detail below with reference to the drawings.

Embodiment 1.
FIG. 1 is a schematic configuration diagram showing a ventilation system 1 provided with an outside air processing device 2 according to Embodiment 1. As shown in FIG. The ventilation system 1 includes an outdoor air supply section 5 , an indoor air supply section 6 , an outdoor air processing device 2 , a ventilation device 3 and a plurality of ducts 4 . The outdoor air supply unit 5 is provided on the outer wall 7 of the building. The outdoor air supply part 5 is a part for taking in the outside air 9 from the outdoors into the indoors. The indoor air supply unit 6 is provided on the ceiling 8 of the building. The indoor air supply part 6 is a part for supplying the outside air 9 taken in by the outdoor air supply part 5 to the indoor space. The outdoor air supply unit 5 and the indoor air supply unit 6 are connected via a plurality of ducts 4 , the outside air processing device 2 and the ventilation device 3 . The duct 4, the outside air processing device 2 and the ventilation device 3 are installed on the ceiling 8 of the building. Hereinafter, upstream and downstream mean upstream and downstream in the flow direction of the outside air 9 from the outdoor air supply section 5 to the indoor air supply section 6 . Further, the direction of flow of the outside air 9 is hereinafter referred to as the direction of air flow.

The duct 4 is a cylindrical member through which the outside air 9 that is taken in from the outdoors flows. The indoor air supply section 6 and the outside air processing device 2 are connected via a duct 4 . Also, the outside air processing device 2 and the ventilation device 3 are connected via a duct 4 . Also, the ventilation device 3 and the outdoor air supply section 5 are connected via a duct 4 . That is, on the ceiling 8 of the building, a duct 4, an outside air processing device 2, a duct 4, a ventilation device 3, and a duct 4 are installed in this order from the upstream side.

The ventilation device 3 is a device that takes in outside air 9 from the outdoor air supply unit 5 into the duct 4 and blows the outside air 9 from the indoor air supply unit 6 toward the indoor space. When the ventilation device 3 is operated, an air flow is generated from the outdoor air supply unit 5 toward the indoor air supply unit 6, and the outside air 9 taken into the outdoor air supply unit 5 flows through the duct 4, the outside air processing device 2, the duct 4, ventilator 3, duct 4 in order. The outside air 9 is purified by a net filter 23 and a cleaning filter 24, which will be described later, and becomes clean air 10, which is supplied from the indoor air supply unit 6 to the indoor space.

The outdoor air processing device 2 is a device that removes microparticulate matter, insects, and the like that are taken in with the outdoor air 9 through the outdoor air supply unit 5 . Fine particulate matter is, for example, PM2.5, pollen. The outside air processing device 2 is suspended behind the ceiling 8 by anchor bolts (not shown) or the like. An inspection opening 81 used for maintenance of the outside air processing device 2 is formed in a portion of the ceiling 8 located below the outside air processing device 2 . The inspection opening 81 is covered with an inspection lid portion 82 except during maintenance. The inspection lid portion 82 can be opened and closed, and covers the inspection opening 81 when closed. The outside air processing device 2 is installed so that the normal line of the lid portion 22, which will be described later, faces downward.

FIG. 2 is a perspective view showing the outside air processing device 2 according to the first embodiment. FIG. 2 illustrates a state in which the lid portion 22 and the lower wall portion 21a of the housing 21 are directed upward. FIG. 3 is a perspective view showing the outside air processing device 2 according to the first embodiment, showing a state in which the lid portion 22 is removed from the outside air processing device 2 shown in FIG. As shown in FIG. 2 , the outside air processing device 2 includes a housing 21 and a lid portion 22 . Further, as shown in FIG. 3 , the outside air processing device 2 includes a net filter 23 and a cleaning filter 24 .

As shown in FIG. 2 , the housing 21 is a box-shaped member forming the outer shell of the outside air processing device 2 . The housing 21 has a lower wall portion 21a, an upper wall portion 21b, a first side wall portion 21c, a second side wall portion 21d, a third side wall portion 21e, and a fourth side wall portion 21f. . The lower wall portion 21a is arranged apart from the upper wall portion 21b along the vertical direction. The first side wall portion 21c, the second side wall portion 21d, the third side wall portion 21e, and the fourth side wall portion 21f connect the peripheral edge of the lower wall portion 21a and the peripheral edge of the upper wall portion 21b.

Lid fixing parts 26 for fixing the lid 22 to the housing 21 are rotatably provided at the four corners of the lower wall 21a. By rotating the lid fixing part 26, the lid fixing part 26 can be switched between a position where the lid part 22 is fixed to the housing 21 and a position where the fixing of the lid part 22 to the housing 21 is released. Accordingly, the attachment of the lid portion 22 to the housing 21 and the removal of the lid portion 22 from the housing 21 can be performed.

As shown in FIG. 3, an opening 21g is formed in the lower wall portion 21a. The opening 21g communicates the inside and the outside of the housing 21 . The opening 21g is an opening for attaching the net filter 23 and the cleaning filter 24 to the inside of the housing 21 and removing the net filter 23 and the cleaning filter 24 to the outside of the housing 21 . The shape of the opening 21g is rectangular in this embodiment.

The first side wall portion 21c is provided with a cylindrical outdoor duct connection portion 21h. A cylindrical indoor duct connection portion 21i is provided on the second side wall portion 21d. As shown in FIG. 1, the duct 4 connected to the outdoor air supply section 5 is connected to the outdoor duct connection section 21h. A duct 4 connected to the ventilation device 3 is connected to the indoor-side duct connection portion 21i. The outdoor duct connection portion 21h and the indoor duct connection portion 21i are made of non-foamed resin in order to ensure the strength required for connection with the duct 4. As shown in FIG.

As shown in FIG. 2, the lid portion 22 is a member that can be opened and closed and closes the opening 21g when closed. The lid portion 22 can be attached to and removed from the housing 21 . By removing the lid portion 22 from the housing 21, maintenance work inside the housing 21 can be performed. The shape of the lid portion 22 is rectangular in this embodiment. A space surrounded by the housing 21 and the lid portion 22 serves as an air passage through which the outside air 9 passes. The housing 21 and the lid portion 22 are made of resin foam having high heat insulation performance in order to suppress the occurrence of dew condensation. A handle 25 is provided on the lower surface of the lid portion 22 to be gripped by a worker when handling the lid portion 22 . The handles 25 are two recesses that are recessed toward the interior of the housing 21 more than other portions. Details of the lid portion 22 will be described later.

As shown in FIG. 3, the net filter 23 is a member that is housed inside the housing 21 and collects moisture, insects, dust, etc. contained in the air. The cleaning filter 24 is a pleated member that is housed inside the housing 21 and collects moisture, fine particulate matter, and the like contained in the air. The net filter 23 and the cleaning filter 24 are spaced apart from each other in the direction of air flow. The net filter 23 is provided upstream of the cleaning filter 24. - 特許庁The net filter 23 and the cleaning filter 24 can be attached to the inside of the housing 21 and removed to the outside of the housing 21 through the opening 21g. When the outside air 9 with high humidity is taken into the inside of the outside air processing device 2 , condensed water may be generated on the net filter 23 and the cleaning filter 24 .

Here, the lid portion 22 will be described in detail with reference to FIGS. 4 to 6. FIG. FIG. 4 is a cross-sectional view of the outside air processing device 2 according to the first embodiment. FIG. 5 is a perspective view showing lid portion 22 according to the first embodiment. FIG. 6 is a plan view showing lid portion 22 according to the first embodiment. As shown in FIG. 4, the lid portion 22 covers the net filter 23 and the cleaning filter 24 from below. As shown in FIG. 5, the lid portion 22 has a bottom wall portion 22a and side wall portions 22b.

The bottom wall portion 22a is formed in a quadrangular shape in plan view. The side wall portion 22b extends upward from the peripheral edge of the bottom wall portion 22a. The side wall portion 22b is formed in a rectangular frame shape in plan view. The side wall portion 22b has four wall portions 22c, 22d, 22e and 22f. The wall portion 22c and the wall portion 22d are spaced apart in the air flow direction. The wall portion 22e and the wall portion 22f are spaced apart in a direction orthogonal to the air flow direction in the in-plane direction of the bottom wall portion 22a.

Inside the lid portion 22, a water receiving portion 22g surrounded by the bottom wall portion 22a and the side wall portion 22b is formed. The water receiving portion 22g is formed in a concave shape that opens upward. The water receiving portion 22g serves to receive condensed water, which is moisture flowing down from the net filter 23 and the cleaning filter 24. As shown in FIG. The height of the side wall portion 22b may be appropriately set in consideration of the expected amount of condensed water generated.

A partition wall 22h and a plurality of ribs 22i are formed on the upper surface of the bottom wall portion 22a. The partition wall 22h partitions the water receiving portion 22g into two water retaining portions 22j and two communication portions 22n. The partition wall 22h protrudes upward from the central portion of the upper surface of the bottom wall portion 22a. The shape of the partition wall 22h is a rectangular parallelepiped in the present embodiment. The outer peripheral surface of the partition wall 22h is spaced apart from the inner peripheral surface of the side wall portion 22b over the entire circumference.

As shown in FIG. 4, the water holding portion 22j is a portion that is arranged one each below the net filter 23 and the cleaning filter 24 to store condensed water. Each of the two water retaining portions 22j is formed in a concave shape that opens upward. Hereinafter, when distinguishing between the two water retaining portions 22j, the water retaining portion 22j disposed below the net filter 23 will be referred to as the first water retaining portion 22k, and the water retaining portion 22j disposed below the cleaning filter 24 will be referred to as the second water retaining portion 22k. 2 water retaining portion 22m. The first water retaining portion 22k and the second water retaining portion 22m are arranged with a space therebetween in the air flow direction with a partition wall 22h interposed therebetween. As shown in FIG. 5, the first water retaining portion 22k is formed surrounded by a bottom wall portion 22a, partition walls 22h, ribs 22i, and wall portions 22c, 22e, and 22f. The second water retention portion 22m is formed surrounded by the bottom wall portion 22a, partition walls 22h, ribs 22i, and wall portions 22d, 22e, and 22f.

The communicating portion 22n is a portion that communicates two adjacent water retaining portions 22j. The communicating portion 22n is formed in a concave shape that opens upward. Communicating portion 22n is formed between wall portion 22e or wall portion 22f and partition wall 22h. The number of communicating portions 22n should be at least one, but two in the present embodiment. The two communication portions 22n are arranged with a space therebetween in a direction orthogonal to the air flow direction with a partition wall 22h interposed therebetween.

The rib 22i is provided inside the communicating portion 22n. The rib 22i is a suppressing portion that suppresses movement of condensed water between adjacent water retaining portions 22j. The rib 22i protrudes upward from the upper surface of the bottom wall portion 22a. The rib 22i extends perpendicular to the air flow direction between the wall portion 22e or the wall portion 22f and the partition wall 22h. The number of ribs 22i should be at least one, but in the present embodiment there are three for each communicating portion 22n. The three ribs 22i arranged in the same communicating portion 22n are spaced apart from each other in the air flow direction.

As shown in FIG. 6, the rib 22i is provided with a cutout portion 22o by cutting out a portion of the rib 22i to allow movement of condensed water between adjacent water retaining portions 22j. The number of notches 22o is not particularly limited, but is one for each rib 22i in the present embodiment. Notch portions 22o formed in adjacent ribs 22i are arranged alternately. That is, the ribs 22i having the notch 22o formed at the end facing the partition wall 22h and the ribs 22i having the notch 22o formed at the end facing away from the partition wall 22h are alternately arranged in the air flow direction. It is It should be noted that the positions of the cutout portions 22o of the plurality of ribs 22i may be aligned in the air flow direction. That is, in all ribs 22i, the notch 22o may be formed only at the end facing the partition wall 22h, or the notch 22o may be formed only at the end facing away from the partition wall 22h.

As shown in FIG. 4, a first lower concave portion 22p for holding the lower end of the net filter 23 is formed in a portion of the upper surface of the bottom wall portion 22a that overlaps with the first water retaining portion 22k. A first upper concave portion 21j in which the upper end portion of the net filter 23 is held is formed on the surface of the upper wall portion 21b facing the inside of the housing 21. As shown in FIG. A second lower concave portion 22q for holding the lower end portion of the cleaning filter 24 is formed in a portion of the upper surface of the bottom wall portion 22a that overlaps with the second water retaining portion 22m. A second upper concave portion 21k in which the upper end portion of the cleaning filter 24 is held is formed in the surface of the upper wall portion 21b facing the inside of the housing 21 . The shape of the net filter 23 is not particularly limited, but in the present embodiment, it is a trapezoid in which the center portion in the vertical direction protrudes downstream from both end portions. Although the shape of the cleaning filter 24 is not particularly limited, it is rectangular in this embodiment.

Next, the effects of the outside air processing device 2 will be described. Here, referring to FIGS. 7 to 13, the lid portion 22C without the ribs 22i and the lid portion 22 with the ribs 22i will be compared. It is also assumed that the lids 22 and 22C are removed from the housing 21 while the condensed water 11 is accumulated on the lids 22 and 22C.

First, the lid portion 22C without the ribs 22i will be described with reference to FIGS. 10 to 13. FIG. FIG. 10 is a plan view showing a lid portion 22C without ribs 22i. 11 is a cross-sectional view taken along the line II-II shown in FIG. 10, showing the center C2 of the lid portion 22C and the center of gravity position F2 of the condensed water 11 in the horizontal state of the lid portion 22C. be. FIG. 12 is a cross-sectional view taken along line II-II shown in FIG. 10, showing the center C2 of the lid portion 22C and the center of gravity position F2 of the condensed water 11 in the inclined state of the lid portion 22C. be. FIG. 13 is a cross-sectional view taken along the line II-II shown in FIG. 10, showing the center C2 of the lid portion 22C in a state in which the lid portion 22C is tilted deeper than the tilted state shown in FIG. 3 is a diagram showing a center-of-gravity position F2 of condensed water 11. FIG.

As shown in FIG. 11, when the lid portion 22C is placed horizontally, the center C2 of the lid portion 22C and the center of gravity position F2 of the condensed water 11 approximately match. As shown in FIG. 12, when the lid portion 22C is tilted 5 degrees with respect to the horizontal axis so that the first water retaining portion 22k is positioned below the second water retaining portion 22m, the lid portion 22C and the center of gravity position F2 of the condensed water 11 are displaced in the air flow direction. As shown in FIG. 13, when the lid portion 22C is tilted 10 degrees with respect to the horizontal axis so that the first water retaining portion 22k is positioned below the second water retaining portion 22m, the state shown in FIG. The deviation along the air flow direction between the center C2 of the lid portion 22C and the center of gravity position F2 of the condensed water 11 is larger than in the illustrated inclined state.

Next, the lid portion 22 provided with the ribs 22i will be described with reference to FIGS. 7 to 9. FIG. 7 is a cross-sectional view taken along the line II shown in FIG. 6, showing the center C1 of the lid portion 22 and the center of gravity position F1 of the condensed water 11 in the horizontal state of the lid portion 22. FIG. be. FIG. 8 is a cross-sectional view taken along the line II shown in FIG. 6, showing the center C1 of the lid portion 22 and the center of gravity position F1 of the condensed water 11 when the lid portion 22 is tilted. be. 9 is a cross-sectional view taken along the line II shown in FIG. 6, showing the center C1 of the lid portion 22 and the center C1 of the lid portion 22 in a state in which the lid portion 22 is tilted deeper than the tilted state shown in FIG. 3 is a diagram showing a center-of-gravity position F1 of condensed water 11. FIG.

As shown in FIG. 7, when the lid portion 22 is horizontal, the center C1 of the lid portion 22 and the center of gravity position F1 of the condensed water 11 are substantially aligned. As shown in FIG. 8, when the lid portion 22 is tilted 5 degrees with respect to the horizontal axis so that the first water retaining portion 22k is positioned below the second water retaining portion 22m, the lid portion 22 and the center of gravity position F1 of the condensed water 11 are displaced in the air flow direction. However, the distance between the center C1 of the lid 22C and the center of gravity F2 of the condensed water 11 shown in FIG. The distance along the flow direction is short.

As shown in FIG. 9, when the lid portion 22 is tilted 10 degrees with respect to the horizontal axis so that the first water retaining portion 22k is positioned below the second water retaining portion 22m, the state shown in FIG. The deviation along the direction of air flow between the center C1 of the lid portion 22 and the position F1 of the center of gravity of the condensed water 11 is greater than in the illustrated inclined state. However, the distance between the center C1 of the lid 22C and the center of gravity F2 of the condensed water 11 shown in FIG. The distance along the flow direction is short.

In this embodiment, as shown in FIGS. 4 and 5, the lid portion 22 has a water receiving portion 22g which is formed in an upwardly open concave shape to receive the condensed water 11 flowing down from the net filter 23 and the cleaning filter 24. is formed, and a rib 22i that suppresses movement of the condensed water 11 is provided in the water receiving portion 22g. As a result, as shown in FIGS. 8, 9, 12 and 13, the position of the center C1 of the lid portion 22 and the center of gravity of the condensed water 11 when the lid portion 22 is tilted is greater than when the ribs 22i are not provided. The distance along the direction of air flow with F1 is reduced. In addition, as shown in FIGS. 7 to 9, the difference in distance along the air flow direction between the center C1 of the lid portion 22 and the position F1 of the center of gravity of the condensed water 11 is reduced between the horizontal state and the inclined state of the lid portion 22. can. Therefore, even if the lid portion 22 is removed from the housing 21 in a state where the condensed water 11 is accumulated on the lid portion 22, it becomes easy to maintain a balance when holding the lid portion 22.例文帳に追加Therefore, the condensed water 11 collected on the lid portion 22 is less likely to spill, and the floor surface below the outside air processing device 2 can be prevented from being soiled.

In the present embodiment, as shown in FIG. 4, the lid portion 22 itself is provided with the water receiving portion 22g. can be suppressed. Therefore, leakage of water to the outside of the device can be suppressed in a state where the housing 21 and the lid portion 22 are assembled.

There are condensed water 11 generated in the net filter 23 and condensed water 11 generated in the clean filter 24, and the condensed water 11 accumulated in the first water retaining portion 22k and the condensed water 11 accumulated in the second water retaining portion 22m One of them may be significantly more than the other. In such a case, the height of the water surface of the condensed water 11 accumulated in the first water retaining portion 22k and the height of the water surface of the condensed water 11 accumulated in the second water retaining portion 22m are different, and the balance when holding the lid portion 22 is The condensed water 11 collected on the lid portion 22 may be spilled. In this regard, in the present embodiment, as shown in FIG. 6, the rib 22i has a notch portion 22o that partially cuts the rib 22i to allow the movement of the condensed water 11 between the adjacent water retaining portions 22j. By being provided, the height of the water surface of the condensed water 11 accumulated in the first water holding portion 22k and the height of the water surface of the condensed water 11 accumulated in the second water holding portion 22m are easily equalized. Therefore, it becomes easier to maintain balance when holding the lid portion 22, and the condensed water 11 accumulated on the lid portion 22 is much less likely to spill.

In the present embodiment, as shown in FIG. 6, the cutouts 22o formed in the adjacent ribs 22i are alternately arranged so that the cutouts 22o formed in the adjacent ribs 22i are aligned in the air flow direction. The movement of the condensed water 11 between the adjacent water retaining portions 22j can be suppressed more than when the water retaining portions 22j are aligned with each other. As a result, excessive movement of the condensed water 11 through the notch 22o can be suppressed.

In this embodiment, the outside air processing device 2 shown in FIG. 1 is installed upstream of the ventilation device 3, but it may be installed downstream of the ventilation device 3. Further, the ventilation device 3 may be a ventilation device with a total heat exchanger that exchanges heat between the air taken indoors and the air discharged outdoors.

FIG. 14 is a diagram showing another installation state of the outside air processing device 2 according to the first embodiment. As shown in FIG. 14, the outside air processing device 2 may be installed on the ceiling 8 while being fixed to the ceiling joists 12 with wood screws (not shown). Also, the inspection opening 81 may be closed with the design panel 13 instead of the inspection lid portion 82 . The design panel 13 is attached to the surface of the ceiling 8 facing the interior space.

In this embodiment, as shown in FIG. The net filter 23 may be omitted. Further, a nitrogen oxide (NO _x ) removing filter, a deodorizing filter, or the like may be arranged downstream of the cleaning filter 24 inside or outside the outside air processing device 2 . Further, in the present embodiment, the pleated cleaning filter 24 is used to remove fine particulate matter, but for example, an electrostatic precipitator or other physically removable filter may be used. The electrostatic precipitator includes a charging section that charges microparticulate matter and a dust collection section that collects the charged microparticulate matter. The microparticulate matter charged by the charging section is captured by the dust collection section due to the Coulomb force.

Embodiment 2.
Next, an outside air processing device 2A according to the second embodiment will be described with reference to FIGS. 15 to 19. FIG. This embodiment differs from the first embodiment in that a water retaining body 22r is provided instead of the rib 22i. In addition, in Embodiment 2, the same code|symbol is attached|subjected about the part which overlaps with above-mentioned Embodiment 1, and description is abbreviate|omitted.

FIG. 15 is a perspective view showing the lid portion 22A of the outside air processing device 2A according to the second embodiment. FIG. 16 is a plan view showing lid portion 22A in the second embodiment. As shown in FIGS. 15 and 16, a water retaining body 22r is installed on the upper surface of the lid portion 22A. The water retaining body 22r is a suppressing portion that can absorb the condensed water 11 and suppresses movement of the condensed water 11 between adjacent water retaining portions 22j. The water holding body 22r preferably has quick-drying property in addition to water absorption property. The water holding body 22r is, for example, a sponge. The water holding body 22r is provided in the entire communication portion 22n of the water receiving portion 22g in the present embodiment, but may be provided in a part of the communication portion 22n. Although the shape of the water holding body 22r is not particularly limited, it is a rectangular parallelepiped in the present embodiment.

Next, the effects of the outside air processing device 2A will be described. Here, referring to FIGS. 12, 13 and 17 to 19, the lid portion 22C without the water retaining body 22r and the lid portion 22A with the water retaining body 22r will be compared. It is also assumed that the lids 22A and 22C are removed from the housing 21 while the condensed water 11 is accumulated on the lids 22A and 22C.

FIG. 17 is a cross-sectional view taken along line III-III shown in FIG. 16, showing the center C1 of the lid portion 22A and the center of gravity position F1 of the condensed water 11 in the horizontal state of the lid portion 22A. be. FIG. 18 is a cross-sectional view taken along line III-III shown in FIG. 16, showing the center C1 of the lid portion 22A and the gravity center position F1 of the condensed water 11 in the inclined state of the lid portion 22A. be. FIG. 19 is a cross-sectional view along line III-III shown in FIG. 3 is a diagram showing a center-of-gravity position F1 of condensed water 11. FIG.

As shown in FIG. 17, when the lid portion 22A is horizontal, the center C1 of the lid portion 22A and the center of gravity position F1 of the condensed water 11 approximately match. As shown in FIG. 18, when the lid portion 22A is tilted 5 degrees with respect to the horizontal axis so that the first water retaining portion 22k is positioned below the second water retaining portion 22m, the lid portion 22A and the center of gravity position F1 of the condensed water 11 are displaced in the air flow direction. However, the distance between the center C1 of the lid 22A and the center of gravity F1 of the condensed water 11 is greater than the distance along the air flow direction between the center C2 of the lid 22C and the center of gravity F2 of the condensed water 11 shown in FIG. The distance along the flow direction is short.

As shown in FIG. 19, when the lid portion 22A is tilted 10 degrees with respect to the horizontal axis so that the first water retaining portion 22k is positioned below the second water retaining portion 22m, the state shown in FIG. The deviation along the air flow direction between the center C1 of the lid portion 22A and the center of gravity position F1 of the condensed water 11 is larger than in the illustrated inclined state. However, the distance between the center C1 of the lid 22A and the center of gravity F1 of the condensed water 11 is greater than the distance along the air flow direction between the center C2 of the lid 22C and the center of gravity F2 of the condensed water 11 shown in FIG. The distance along the flow direction is short.

In this embodiment, the lid portion 22A is formed with a water receiving portion 22g which is formed in an upwardly open concave shape to receive the condensed water 11 flowing down from the net filter 23 and the cleaning filter 24. The water receiving portion 22g , a water retaining body 22r for suppressing movement of the condensed water 11 is provided. As a result, as shown in FIGS. 12, 13, 18 and 19, the center C1 of the lid portion 22A and the center of gravity of the condensed water 11 when the lid portion 22A is tilted are greater than when the water retaining body 22r is not provided. The distance along the air flow direction with position F1 is shortened. Further, as shown in FIGS. 17 to 19, the difference in distance along the air flow direction between the center C1 of the lid portion 22A and the center of gravity F1 of the condensed water 11 is reduced between the horizontal state and the inclined state of the lid portion 22A. can. Therefore, even if the lid portion 22A is removed from the housing 21 in a state where the condensed water 11 is accumulated on the lid portion 22A, it is easy to maintain a balance when holding the lid portion 22A. Therefore, it becomes difficult to spill the condensed water 11 accumulated on the lid portion 22A, and it is possible to prevent the floor surface below the outside air processing device 2A from being soiled.

Embodiment 3.
Next, an outside air processing device 2B according to the third embodiment will be described with reference to FIGS. 20 and 21. FIG. The present embodiment differs from the first embodiment in that the net filter 23 and the partition wall 22h are omitted, and the water retaining portion 22j is one. In addition, in Embodiment 3, the same code|symbol is attached|subjected about the part which overlaps with above-mentioned Embodiment 1, and description is abbreviate|omitted.

FIG. 20 is a cross-sectional view of an outside air processing device 2B according to the third embodiment. FIG. 21 is a plan view showing lid portion 22B according to the third embodiment. As shown in FIGS. 20 and 21, the water receiving portion 22g is a single water retaining portion 22j in this embodiment. The cleaning filter 24 is installed in the central portion of the housing 21 in the air flow direction. The rib 22i is provided inside the water retaining portion 22j. The rib 22i is a suppressing portion that suppresses movement of the condensed water 11 (not shown) inside the water retaining portion 22j. As shown in FIG. 21, the rib 22i extends perpendicularly to the air flow direction between the wall portion 22e and the wall portion 22f. The ribs 22i are provided upstream and downstream of the cleaning filter 24, respectively. The number of ribs 22i is not particularly limited, but in the present embodiment, there are two ribs in total, one each on the upstream side and downstream side of the cleaning filter 24 .

A cutout portion 22o is provided in the rib 22i by cutting out a portion of the rib 22i to allow movement of the condensed water 11 within the water retaining portion 22j. The number of notches 22o is not particularly limited, but is one for each rib 22i in the present embodiment. Notch portions 22o formed in ribs 22i adjacent to each other with cleaning filter 24 interposed therebetween are arranged alternately. That is, a rib 22i having a notch 22o formed at the end facing the wall 22e and a rib 22i having the notch 22o formed at the end facing the wall 22f are arranged with the cleaning filter 24 interposed therebetween. there is It should be noted that the positions of the cutout portions 22o of the plurality of ribs 22i may be aligned in the air flow direction. That is, in all ribs 22i, the notch 22o may be formed only at the end facing the wall 22e, or the notch 22o may be formed only at the end facing the wall 22f. Note that the water retaining body 22r of the second embodiment may be provided instead of the rib 22i.

Next, the effects of the outside air processing device 2B will be described.

In this embodiment, the lid portion 22B is formed with a water receiving portion 22g which is formed in an upwardly open concave shape to receive the condensed water 11 flowing down from the cleaning filter 24. A rib 22i is provided to suppress the movement of the . Accordingly, even if the lid portion 22B is removed from the housing 21 in a state where the condensed water 11 is accumulated on the lid portion 22B, it becomes easy to maintain a balance when holding the lid portion 22B. Therefore, it becomes difficult to spill the condensed water 11 accumulated on the lid portion 22B, and it is possible to suppress soiling of the floor surface below the outside air processing device 2B.

In the present embodiment, the rib 22i is provided with a notch portion 22o by cutting a part of the rib 22i to allow movement of the condensed water 11 in the water retaining portion 22j. The height of the water surface of the condensed water 11 accumulated on the upstream side and downstream side of the cleaning filter 24 can be easily made uniform. Therefore, it becomes easier to maintain a balance when holding the lid portion 22B, and it becomes more difficult to spill the condensed water 11 accumulated on the lid portion 22B.

In the present embodiment, cutouts 22o formed in adjacent ribs 22i with cleaning filter 24 interposed therebetween are arranged alternately. As a result, the cutout portions 22o formed in the ribs 22i adjacent to each other with the cleaning filter 24 interposed therebetween are aligned in the air flow direction, and the upstream side and downstream side of the water retaining portion 22j with the cleaning filter 24 therebetween are arranged. It becomes easy to make the height of the water surface of the condensed water 11 that accumulates evenly. Therefore, it becomes easier to maintain a balance when holding the lid portion 22B, and it becomes more difficult to spill the condensed water 11 accumulated on the lid portion 22B.

The configurations shown in the above embodiments are only examples, and can be combined with other known techniques, or can be combined with other embodiments, without departing from the scope of the invention. It is also possible to omit or change part of the configuration.

1 ventilation system, 2, 2A, 2B outdoor air treatment device, 3 ventilation device, 4 duct, 5 outdoor air supply, 6 indoor air supply, 7 outer wall, 8 ceiling, 9 outdoor air, 10 clean air, 11 condensed water, 12 Ceiling rim 13 Design panel 21 Housing 21a Lower wall 21b Upper wall 21c First side wall 21d Second side wall 21e Third side wall 21f Fourth side wall 21g Opening 21h Outdoor duct connection part 21i Indoor duct connection part 21j First upper concave part 21k Second upper concave part 22, 22A, 22B, 22C Lid part 22a Bottom wall part 22b Side wall part 22c , 22d, 22e, 22f wall portion, 22g water receiving portion, 22h partition wall, 22i rib, 22j water retaining portion, 22k first water retaining portion, 22m second water retaining portion, 22n communicating portion, 22o notch portion, 22p first Lower recessed portion 22q Second lower recessed portion 22r Water retaining body 23 Net filter 24 Cleaning filter 25 Handle 26 Lid portion fixing component 81 Inspection port 82 Inspection lid portion.

Claims (4)

An outdoor air processing device for cleaning the outdoor air taken indoors from the outdoors,
a housing formed in a box shape and having an opening formed in a lower wall;
a lid that can be opened and closed and closes the opening when closed;
a filter that is housed inside the housing and collects moisture contained in the outside air;
with
The lid portion is formed with a water receiving portion which is formed in an upwardly open concave shape to receive the water flowing down from the filter,
The water receiving portion is provided with a suppressing portion that suppresses movement of the moisture ,
A plurality of the filters are provided at intervals in the flow direction of the outside air,
The water receiving portion is provided with a plurality of water retaining portions arranged below the respective filters to retain the water, and a communicating portion communicating between the adjacent water retaining portions,
The external air processing device , wherein the communication portion is provided with the suppressing portion . The suppressing portion is a rib that restricts movement of the water between the adjacent water retaining portions,
2. The outside air processing device according to claim 1 , wherein the rib is provided with a cutout portion that cuts out a portion of the rib to allow movement of the water between the adjacent water retaining portions. . 2. The outside air processing apparatus according to claim 1 , wherein the suppressing portion is a water retaining body capable of absorbing the moisture. The outside air processing device according to any one of claims 1 to 3 ;
a ventilation device that takes in outside air from the outdoors into the room and blows the outside air toward the indoor space;
A ventilation system comprising:

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