JP2021175929A - Outside air treatment device and ventilation system - Google Patents

Abstract

To provide an outside air treatment device which is capable of preventing moisture from being leaked to an outside of the device in a state where a housing and a lid part are assembled, and makes moisture which is stagnated on the lid part hard to overflow in a state where the lid part is removed from the housing.SOLUTION: An outside air treatment device 2 is configured to clean outside air to be taken from an exterior to an interior. The outside air treatment device 2 comprises: a housing 21 which is box-shaped and in which an opening 21g is formed in a lower wall part 21a; a lid part 22 which is openable/closable and closes the opening 21g while closed; and a net filter 23 and a cleaning filter 24 which are accommodated in the housing 21 and capture moisture contained in outside air. A water receiving part 22g which is formed into a recessed shape opened upward and receives moisture flowing down from the net filter 23 and the cleaning filter 24 is formed in the lid part 22. Ribs suppressing movements of moisture are provided in the water receiving part 22g.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to an outside air treatment device for purifying the outside air taken indoors and a ventilation system including an outside air treatment device.

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. Further, in recent years, due to the influence of the arrival of fine particulate matter represented by PM (Particulate Matter) 2.5 and the arrival of pollen such as sugi and hinoki, the fine particulate matter and pollen are used when the outside air is supplied indoors. Is required to be removed. In addition, when the outside air is supplied indoors, insects, dust, etc. may be sucked together with the outside air. Therefore, it is also required to remove insects, dust, etc. when supplying outside air indoors.

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

The outside air treatment device may suck in fog, for example, when fog is generated. When the mist is sucked into the outside air treatment device, the mist may adhere to the filter and condensate water may be generated. Therefore, the outside air treatment device needs a structure for retaining condensed water.

The outside air treatment device disclosed in Patent Document 1 has a housing formed in a box shape for accommodating a filter and an opening formed in a lower wall portion, and a plate shape that can be opened and closed and closes the opening when closed. With a lid. In the outside air treatment device disclosed in Patent Document 1, the housing and the lid are butted against each other, and the lid and the side wall of the housing extending upward from the peripheral edge of the lid have a recess for retaining condensed water. It is formed.

Japanese Patent No. 4670441

In the outside air treatment device disclosed in Patent Document 1, since a concave portion is formed between the lid portion and the housing portion, it is condensed through a gap generated in the abutting surface between the housing portion and the lid portion due to dimensional error, assembly error, or the like. Water may leak out of the device.

The outside air treatment apparatus disclosed in Patent Document 1 has a structure in which condensed water does not leak out of the apparatus from the abutting surface between the housing and the lid portion, and is collected on the lid portion. When the worker removes the lid from the housing while the condensed water is collected on the lid, the condensed water can move freely on the lid because the condensed water is a fluid. In the outside air treatment device disclosed in Patent Document 1, since the removed lid portion is not always horizontal, the condensed water will spill unless there is a means for suppressing the movement of the condensed water. Further, in the outside air treatment device disclosed in Patent Document 1, since the lid itself does not have a recess for retaining condensed water, the condensed water tends to spill. As a result, the floor surface below the outside air treatment device may be soiled.

The present disclosure has been made in view of the above, and it is possible to suppress the leakage of water to the outside of the device when the housing and the lid are assembled, and the lid is removed from the housing. The purpose is to obtain an outside air treatment device that makes it difficult for the water accumulated on the part to spill.

In order to solve the above-mentioned problems and achieve the object, the outside air treatment device according to the present disclosure is an outside air treatment device that purifies the outside air taken in from the outside to the inside, and is formed in a box shape and has a lower wall portion. A housing with an opening formed in the housing, a lid that can be opened and closed to close the opening when closed, and a filter that is housed inside the housing and collects moisture contained in the outside air. Be prepared. The lid portion is formed in a concave shape that opens upward, and a water receiving portion that receives the water flowing down from the filter is formed. The water receiving portion is provided with a suppressing portion that suppresses the movement of water.

In the outside air treatment 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 at the same time, the outside air treatment device collects on the lid with the lid removed from the housing. It has the effect of making it difficult for water to spill.

Schematic configuration diagram showing a ventilation system including the outside air treatment device according to the first embodiment. The perspective view which showed the outside air processing apparatus which concerns on Embodiment 1. It is a perspective view which showed the outside air processing apparatus which concerns on Embodiment 1, and is the figure which shows the state which removed the cover part from the outside air processing apparatus shown in FIG. Sectional drawing of the outside air processing apparatus which concerns on Embodiment 1. Perspective view showing the lid portion in the first embodiment Top view showing the lid portion in the first embodiment FIG. 6 is a cross-sectional view taken along the line I-I shown in FIG. 6, showing the center of the lid and the position of the center of gravity of the condensed water in the horizontal state of the lid. FIG. 6 is a cross-sectional view taken along the line I-I shown in FIG. 6, showing the center of the lid and the position of the center of gravity of the condensed water in an inclined state of the lid. It is a cross-sectional view along the line I-I shown in FIG. 6, and the center of the lid and the position of the center of gravity of the condensed water in the state where the lid is tilted deeper than the tilted state shown in FIG. 8 are shown. Figure shown Top view showing the lid part 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 position of the center of gravity of the condensed water in the horizontal state of the lid. FIG. 10 is a cross-sectional view taken along line II-II shown in FIG. 10, showing the center of the lid and the position of the center of gravity of the condensed water in an inclined state of the lid. It is a cross-sectional view along the line II-II shown in FIG. 10, and the center of the lid portion and the position of the center of gravity of the condensed water in the state where the lid portion is inclined deeper than the inclined state shown in FIG. Figure shown The figure which showed the other installation state of the outside air processing apparatus which concerns on Embodiment 1. A perspective view showing a lid portion of the outside air treatment device according to the second embodiment. Top view showing the lid portion in the second embodiment It is a cross-sectional view along the line III-III shown in FIG. It is a cross-sectional view along the line III-III shown in FIG. It is a cross-sectional view along the line III-III shown in FIG. 16, and the center of the lid and the position of the center of gravity of the condensed water in the state where the lid is tilted deeper than the tilted state shown in FIG. Figure shown Sectional drawing of the outside air processing apparatus which concerns on Embodiment 3. Top view showing the lid portion in the third embodiment

Hereinafter, the outside air treatment device and the ventilation system according to the embodiment will be described in detail with reference to the drawings.

Embodiment 1.
FIG. 1 is a schematic configuration diagram showing a ventilation system 1 including the outside air treatment device 2 according to the first embodiment. The ventilation system 1 includes an outdoor air supply unit 5, an indoor air supply unit 6, an outside air treatment 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 unit 5 is a portion for taking in the outside air 9 from the outside indoors. The indoor air supply unit 6 is provided on the ceiling 8 of the building. The indoor air supply unit 6 is a portion for supplying the outside air 9 taken into the outdoor air supply unit 5 to the indoor space. The outdoor air supply unit 5 and the indoor air supply unit 6 are connected to each other via a plurality of ducts 4, an outside air treatment device 2, and a ventilation device 3. The duct 4, the outside air treatment device 2, and the ventilation device 3 are installed on the ceiling 8 of the building. Hereinafter, the terms upstream and downstream mean upstream and downstream in the flow direction of the outside air 9 from the outdoor air supply unit 5 to the indoor air supply unit 6. Further, hereinafter, the flow direction of the outside air 9 is referred to as an air flow direction.

The duct 4 is a cylindrical member through which the outside air 9 taken in from the outside to the inside flows. The indoor air supply unit 6 and the outside air treatment device 2 are connected to each other via a duct 4. Further, the outside air treatment device 2 and the ventilation device 3 are connected via a duct 4. Further, the ventilation device 3 and the outdoor air supply unit 5 are connected to each other via a duct 4. That is, a duct 4, an outside air treatment device 2, a duct 4, a ventilation device 3, and a duct 4 are installed on the ceiling 8 of the building in this order from the upstream side.

The ventilation device 3 is a device that takes in the 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 to the indoor air supply unit 6, and the outside air 9 taken into the outdoor air supply unit 5 is a duct 4, an outside air treatment device 2, and a duct. 4. Pass through the ventilation device 3 and the duct 4 in this order. The outside air 9 is purified by the net filter 23 and the cleaning filter 24, which will be described later, to become clean air 10, and is supplied to the indoor space from the indoor air supply unit 6.

The outside air processing device 2 is a device that removes fine particulate matter, insects, etc. taken in together with the outside air 9 through the outdoor air supply unit 5. The fine particulate matter is, for example, PM2.5, pollen. The outside air treatment device 2 is suspended from the back of the ceiling 8 by anchor bolts or the like (not shown). An inspection port 81 used for maintenance of the outside air treatment device 2 is formed in a portion of the ceiling 8 located below the outside air treatment device 2. The inspection port 81 is covered with an inspection lid 82 except during maintenance. The inspection lid portion 82 is openable and closable, and covers the inspection port 81 when it is closed. The outside air treatment 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 shows 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, and is a diagram 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 that constitutes the outer shell of the outside air treatment 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 away 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.

At the four corners of the lower wall portion 21a, lid portion fixing parts 26 for fixing the lid portion 22 to the housing 21 are rotatably provided. By rotating the lid portion fixing component 26, the lid portion fixing component 26 can be switched between a position where the lid portion 22 is fixed to the housing 21 and a position where the lid portion 22 is released from being fixed to the housing 21. As a result, the lid portion 22 can be attached to the housing 21 and the lid portion 22 can be removed from the housing 21.

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 21 g is a quadrangle in the present embodiment.

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

As shown in FIG. 2, the lid portion 22 is a member that can be opened and closed and closes the opening 21 g when closed. The lid portion 22 is attachable to and removable 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 a quadrangle in the present embodiment. The space surrounded by the housing 21 and the lid 22 serves as an air passage through which the outside air 9 passes. The housing 21 and the lid 22 are made of a resin foam having high heat insulating performance in order to suppress the occurrence of dew condensation. On the lower surface of the lid portion 22, a handle 25 that is gripped by an operator when handling the lid portion 22 is provided. The handle 25 is two recesses that are recessed toward the inside of the housing 21 from other portions. The details of the lid portion 22 will be described later.

As shown in FIG. 3, the net filter 23 is a member housed inside the housing 21 and collects moisture, insects, dust and the like contained in the air. The cleaning filter 24 is a pleated member 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 provided at intervals in the air flow direction. The net filter 23 is provided on the upstream side of the cleaning filter 24. The net filter 23 and the cleaning filter 24 can be attached to the inside of the housing 21 and removed from the outside of the housing 21 through the opening 21g. When the high humidity outside air 9 is taken into the outside air treatment device 2, condensed water may be generated in 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. 4 is a cross-sectional view of the outside air treatment device 2 according to the first embodiment. FIG. 5 is a perspective view showing the lid portion 22 according to the first embodiment. FIG. 6 is a plan view showing the 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 a side wall portion 22b.

The bottom wall portion 22a is formed in a quadrangle in a 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 square frame shape in a plan view. The side wall portion 22b has four wall portions 22c, 22d, 22e, 22f. The wall portion 22c and the wall portion 22d are arranged at intervals in the air flow direction. The wall portion 22e and the wall portion 22f are arranged at intervals in the in-plane direction of the bottom wall portion 22a in a direction orthogonal to the air flow direction.

Inside the lid portion 22, a water receiving portion 22g surrounded by a bottom wall portion 22a and a 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 plays a role of receiving condensed water which is water flowing down from the net filter 23 and the cleaning filter 24. The height of the side wall portion 22b may be appropriately set in consideration of the expected amount of condensed water generated.

One 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 communicating portions 22n. The partition wall 22h projects 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 provided at a distance from the inner peripheral surface of the side wall portion 22b over the entire circumference.

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

The communication portion 22n is a portion that communicates two adjacent water retention portions 22j with each other. The communication portion 22n is formed in a concave shape that opens upward. The communication portion 22n is formed between the wall portion 22e or the wall portion 22f and the partition wall 22h. The number of communication portions 22n may be at least one, but in the present embodiment, it is two. The two communication portions 22n are arranged with a partition wall 22h in between and spaced apart from each other in a direction orthogonal to the air flow direction.

The rib 22i is provided in the communication portion 22n. The rib 22i is a suppression unit that suppresses the movement of condensed water between adjacent water retention units 22j. The rib 22i projects upward from the upper surface of the bottom wall portion 22a. The rib 22i extends between the wall portion 22e or the wall portion 22f and the partition wall 22h so as to be orthogonal to the air flow direction. The number of ribs 22i may be at least one, but in the present embodiment, the number of ribs 22i is three for each communication portion 22n. The three ribs 22i arranged in the same communication portion 22n are provided so as to be 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 that cuts out a part of the rib 22i and allows the movement of condensed water between adjacent water retention portions 22j. The number of cutouts 22o is not particularly limited, but is one for each rib 22i in the present embodiment. The notches 22o formed in the adjacent ribs 22i are arranged alternately. That is, the rib 22i having the notch 22o formed at the end facing the partition wall 22h and the rib 22i having the notch 22o formed at the end facing the partition wall 22h are alternately arranged in the air flow direction. Has been done. The positions of the notches 22o of the plurality of ribs 22i may be aligned in the air flow direction. That is, in all the 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 opposite to the partition wall 22h.

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

Next, the effect of the outside air treatment device 2 will be described. Here, with reference to FIGS. 7 to 13, the lid portion 22C not provided with the rib 22i and the lid portion 22 provided with the rib 22i will be described while being compared with each other. Further, it is assumed that the lids 22 and 22C are removed from the housing 21 with the condensed water 11 accumulated on the lids 22 and 22C.

First, the lid portion 22C not provided with the rib 22i will be described with reference to FIGS. 10 to 13. FIG. 10 is a plan view showing the lid portion 22C not provided with the rib 22i. FIG. 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 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 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, with the center C2 of the lid portion 22C in a state where the lid portion 22C is tilted deeper than the tilted state shown in FIG. It is a figure which showed the center of gravity position F2 of condensed water 11.

As shown in FIG. 11, when the lid portion 22C is horizontal, the center C2 of the lid portion 22C and the center of gravity position F2 of the condensed water 11 substantially coincide with each other. As shown in FIG. 12, in a state where the lid portion 22C is tilted 5 degrees with respect to the horizontal axis so that the first water retention portion 22k is located below the second water retention portion 22m, the lid portion 22C The center C2 of the water and the center of gravity position F2 of the condensed water 11 are displaced in the air flow direction. As shown in FIG. 13, in a state where the lid portion 22C is tilted by 10 degrees with respect to the horizontal axis so that the first water retention portion 22k is located below the second water retention portion 22m, FIG. 12 shows. The deviation between the center C2 of the lid portion 22C and the center of gravity position F2 of the condensed water 11 along the air flow direction is larger than the inclined state shown.

Next, the lid portion 22 provided with the rib 22i will be described with reference to FIGS. 7 to 9. FIG. 7 is a cross-sectional view taken along the line I-I 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. be. FIG. 8 is a cross-sectional view taken along the line I-I 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 inclined state of the lid portion 22. be. FIG. 9 is a cross-sectional view taken along the line I-I shown in FIG. It is a figure which showed the center of gravity position F1 of condensed water 11.

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 substantially coincide with each other. As shown in FIG. 8, in a state where the lid portion 22 is tilted 5 degrees with respect to the horizontal axis so that the first water retention portion 22k is located below the second water retention portion 22m, the lid portion 22 The center C1 of the water and the center of gravity position F1 of the condensed water 11 are displaced in the air flow direction. However, rather than the distance 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 shown in FIG. 12, the air between the center C1 of the lid portion 22 and the center of gravity position F1 of the condensed water 11 The distance along the flow direction is short.

As shown in FIG. 9, when the lid portion 22 is tilted by 10 degrees with respect to the horizontal axis so that the first water retention portion 22k is located below the second water retention portion 22m, FIG. 8 shows. The deviation between the center C1 of the lid portion 22 and the center of gravity position F1 of the condensed water 11 along the air flow direction is larger than the inclined state shown. However, rather than the distance 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 shown in FIG. 13, the air between the center C1 of the lid portion 22 and the center of gravity position F1 of the condensed water 11 The distance along the flow direction is short.

In the present embodiment, as shown in FIGS. 4 and 5, the lid portion 22 has a water receiving portion 22g that is formed in a concave shape that opens upward and receives the condensed water 11 that flows down from the net filter 23 and the cleaning filter 24. Is formed, and the water receiving portion 22g is provided with a rib 22i that suppresses the movement of the condensed water 11. As a result, as shown in FIGS. 8, 9, 12 and 13, the position of the center C1 of the lid 22 and the center of gravity of the condensed water 11 when the lid 22 is tilted as compared with the case where the rib 22i is not provided. The distance along the air flow direction with F1 becomes shorter. Further, as shown in FIGS. 7 to 9, the difference in distance between the center C1 of the lid portion 22 and the center of gravity position F1 of the condensed water 11 along the air flow direction is small 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 balance the holding of the lid portion 22. Therefore, the condensed water 11 accumulated on the lid portion 22 is less likely to be spilled, and it is possible to prevent the floor surface below the outside air treatment device 2 from being soiled.

In the present embodiment, as shown in FIG. 4, since the water receiving portion 22g is provided on the lid portion 22 itself, the condensed water 11 is outside the device through the gap formed in the abutting surface between the housing 21 and the lid portion 22. It is possible to prevent leakage to. Therefore, it is possible to suppress the leakage of water to the outside of the device in the state where the housing 21 and the lid portion 22 are assembled.

There are a condensed water 11 generated by the net filter 23 and a condensed water 11 generated by the cleaning filter 24. 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 collected in the first water holding portion 22k and the height of the water surface of the condensed water 11 collected in the second water holding portion 22m are different, and the balance when holding the lid portion 22 is different. It becomes difficult to remove the water, and the condensed water 11 accumulated on the lid 22 may be spilled. In this regard, in the present embodiment, as shown in FIG. 6, the rib 22i has a cutout portion 22o that cuts out a part of the rib 22i and allows the condensed water 11 to move between the adjacent water retention portions 22j. By being provided, it becomes easy to equalize the height of the water surface of the condensed water 11 collected in the first water retention portion 22k and the height of the water surface of the condensed water 11 collected in the second water retention portion 22m. Therefore, it becomes easier to keep a balance when holding the lid portion 22, and it becomes more difficult to spill the condensed water 11 accumulated on the lid portion 22.

In the present embodiment, as shown in FIG. 6, the notches 22o formed in the adjacent ribs 22i are arranged alternately, so that the notches 22o formed in the adjacent ribs 22i are in the air flow direction. It is possible to suppress the movement of the condensed water 11 between the adjacent water holding portions 22j as compared with the case where they are arranged in the same direction. As a result, excessive movement of the condensed water 11 through the notch 22o can be suppressed.

In the present embodiment, the outside air treatment device 2 shown in FIG. 1 is installed on the upstream side of the ventilation device 3, but may be installed on the downstream side 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 in indoors and the air discharged to the outside.

FIG. 14 is a diagram showing another installation state of the outside air treatment device 2 according to the first embodiment. As shown in FIG. 14, the outside air treatment device 2 may be installed on the ceiling 8 in a state of being fixed to the field edge 12 by a wood screw (not shown). Further, the inspection port 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 indoor space.

In the present embodiment, as shown in FIG. 1, the net filter 23 is provided in the outside air treatment device 2, but if a means for preventing the invasion of insects, coarse dust, etc. is provided upstream of the outside air treatment device 2, 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 treatment device 2. Further, in the present embodiment, the pleated cleaning filter 24 is used for removing the fine particulate matter, but for example, an electrostatic precipitator or another physically removable filter may be used. The electrostatic precipitator includes a charged portion that charges the fine particulate matter and a dust collector that collects the charged microparticulate matter. The fine particulate matter charged by the charged part is captured by the dust collecting part by the Coulomb force.

Embodiment 2.
Next, the outside air processing device 2A according to the second embodiment will be described with reference to FIGS. 15 to 19. The present embodiment is different from the above-described first embodiment in that a water retaining body 22r is provided instead of the rib 22i. In the second embodiment, the same reference numerals are given to the parts that overlap with the first embodiment, and the description thereof will be omitted.

FIG. 15 is a perspective view showing a lid portion 22A of the outside air treatment device 2A according to the second embodiment. FIG. 16 is a plan view showing the lid portion 22A according to 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 retention body 22r is a suppression unit that can absorb the condensed water 11 and suppresses the movement of the condensed water 11 between the adjacent water retention units 22j. The water retaining body 22r preferably has quick-drying property in addition to water absorption. The water retaining body 22r is, for example, a sponge. In the present embodiment, the water retaining body 22r is provided in the entire area of the communication portion 22n of the water receiving portion 22g, but may be provided in a part of the communication portion 22n. The shape of the water retaining body 22r is not particularly limited, but is a rectangular parallelepiped in the present embodiment.

Next, the effect of the outside air treatment device 2A will be described. Here, with reference to FIGS. 12, 13 and 17 to 19, the lid portion 22C not provided with the water retaining body 22r and the lid portion 22A provided with the water retaining body 22r will be described while being compared with each other. Further, it is assumed that the lids 22A and 22C are removed from the housing 21 with the condensed water 11 accumulated on the lids 22A and 22C.

FIG. 17 is a cross-sectional view taken along the 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 the 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 inclined state of the lid portion 22A. be. FIG. 19 is a cross-sectional view taken along the line III-III shown in FIG. It is a figure which showed the center of gravity position F1 of condensed water 11.

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 substantially coincide with each other. As shown in FIG. 18, in a state where the lid portion 22A is tilted 5 degrees with respect to the horizontal axis so that the first water retention portion 22k is located below the second water retention portion 22m, the lid portion 22A The center C1 of the water and the center of gravity position F1 of the condensed water 11 are displaced in the air flow direction. However, rather than the distance 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 shown in FIG. 12, the air between the center C1 of the lid portion 22A and the center of gravity position F1 of the condensed water 11 The distance along the flow direction is short.

As shown in FIG. 19, in a state where the lid portion 22A is tilted by 10 degrees with respect to the horizontal axis so that the first water retention portion 22k is located below the second water retention portion 22m, FIG. 18 shows. The deviation between the center C1 of the lid portion 22A and the center of gravity position F1 of the condensed water 11 along the air flow direction is larger than the inclined state shown. However, rather than the distance 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 shown in FIG. 13, the air between the center C1 of the lid portion 22A and the center of gravity position F1 of the condensed water 11 The distance along the flow direction is short.

In the present embodiment, the lid portion 22A is formed with a water receiving portion 22g formed in a concave shape that opens upward to receive the condensed water 11 flowing down from the net filter 23 and the cleaning filter 24, and the water receiving portion 22g is formed. , A water retaining body 22r that suppresses the movement of the condensed water 11 is provided. As a result, as shown in FIGS. 12, 13, 18 and 19, the center of gravity of the center C1 of the lid 22A and the center of gravity of the condensed water 11 when the lid 22A is tilted as compared with the case where the water retention body 22r is not provided. The distance from the position F1 along the air flow direction becomes shorter. Further, as shown in FIGS. 17 to 19, the difference in the distance 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 small 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 becomes easy to balance the holding of the lid portion 22A. Therefore, the condensed water 11 accumulated on the lid portion 22A is less likely to be spilled, and it is possible to prevent the floor surface below the outside air treatment device 2A from being soiled.

Embodiment 3.
Next, the outside air processing device 2B according to the third embodiment will be described with reference to FIGS. 20 and 21. The present embodiment is different from the above-described first embodiment in that the net filter 23 and the partition wall 22h are omitted and the water retention portion 22j is unified. In the third embodiment, the same reference numerals are given to the parts that overlap with the first embodiment, and the description thereof will be omitted.

FIG. 20 is a cross-sectional view of the outside air treatment device 2B according to the third embodiment. FIG. 21 is a plan view showing the lid portion 22B according to the third embodiment. As shown in FIGS. 20 and 21, the water receiving portion 22g becomes a single water retaining portion 22j in the present embodiment. The cleaning filter 24 is installed at the center of the housing 21 in the air flow direction. The rib 22i is provided in the water retention portion 22j. The rib 22i is a suppression unit that suppresses the movement of the condensed water 11 (not shown) in the water retention unit 22j. As shown in FIG. 21, the rib 22i extends between the wall portion 22e and the wall portion 22f so as to be orthogonal to the air flow direction. The ribs 22i are provided on the upstream side and the downstream side of the cleaning filter 24, respectively. The number of ribs 22i is not particularly limited, but in the present embodiment, there are two ribs, one on the upstream side and one on the downstream side of the cleaning filter 24.

The rib 22i is provided with a notch 22o that cuts out a part of the rib 22i and allows the condensed water 11 to move in the water retention portion 22j. The number of cutouts 22o is not particularly limited, but is one for each rib 22i in the present embodiment. The notches 22o formed in the ribs 22i adjacent to each other with the cleaning filter 24 interposed therebetween are arranged alternately. That is, the rib 22i having the notch 22o formed at the end facing the wall 22e and the 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. The positions of the notches 22o of the plurality of ribs 22i may be aligned in the air flow direction. That is, in all the 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. In addition, instead of the rib 22i, the water retention body 22r of the second embodiment may be provided.

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

In the present embodiment, the lid portion 22B is formed with a water receiving portion 22g that is formed in a concave shape that opens upward and receives the condensed water 11 that flows down from the cleaning filter 24, and the water receiving portion 22g is formed with the condensed water 11 A rib 22i is provided to suppress the movement of the rib 22i. As a result, 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 balance the holding of the lid portion 22B. Therefore, the condensed water 11 accumulated on the lid portion 22B is less likely to be spilled, and it is possible to prevent the floor surface below the outside air treatment device 2B from being soiled.

In the present embodiment, the rib 22i is provided with a cutout portion 22o that allows the movement of the condensed water 11 in the water retention portion 22j by cutting out a part of the rib 22i, so that the rib 22i is of the water retention portion 22j. It becomes easy to equalize the height of the water surface of the condensed water 11 that collects on the upstream side and the downstream side that sandwich the cleaning filter 24. Therefore, it becomes easier to keep 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, the notches 22o formed in the ribs 22i adjacent to each other with the cleaning filter 24 interposed therebetween are arranged alternately. As a result, the upstream side and the downstream side of the water retention portion 22j sandwiching the clean filter 24 are more than the case where the notches 22o formed in the ribs 22i adjacent to each other across the clean filter 24 are arranged in the air flow direction. It becomes easy to equalize the height of the water surface of the condensed water 11 that collects in and. Therefore, it becomes easier to keep 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 configuration shown in the above embodiments is an example, and can be combined with another known technique, can be combined with each other, and does not deviate from the gist. It is also possible to omit or change a part of the configuration.

1 Ventilation system, 2, 2A, 2B Outside air treatment device, 3 Ventilation device, 4 Duct, 5 Outdoor air supply part, 6 Indoor air supply part, 7 Outer wall, 8 Ceiling, 9 Outside air, 10 Clean air, 11 Condensed water, 12 Field edge, 13 design panel, 21 housing, 21a lower wall part, 21b upper wall part, 21c first side wall part, 21d second side wall part, 21e third side wall part, 21f fourth side wall part, 21g Opening, 21h outdoor duct connection, 21i indoor duct connection, 21j first upper recess, 21k second upper recess, 22, 22A, 22B, 22C lid, 22a bottom wall, 22b side wall, 22c , 22d, 22e, 22f wall part, 22g water receiving part, 22h partition wall, 22i rib, 22j water retention part, 22k first water retention part, 22m second water retention part, 22n communication part, 22o notch part, 22p first Lower recess, 22q 2nd lower recess, 22r water retainer, 23 net filter, 24 cleaning filter, 25 handle, 26 lid fixing parts, 81 inspection port, 82 inspection lid.

Claims (5)

It is an outside air treatment device that purifies the outside air taken in from the outside to the inside.
A box-shaped housing with an opening in the lower wall,
A lid that can be opened and closed and closes the opening when closed,
A filter housed inside the housing and collecting moisture contained in the outside air,
With
The lid portion is formed with a concave shape that opens upward, and a water receiving portion that receives the water flowing down from the filter is formed.
An outside air treatment device characterized in that the water receiving portion is provided with a suppressing portion that suppresses the movement of the water. A plurality of the filters are provided at intervals in the flow direction of the outside air.
In the water receiving portion, a plurality of water retaining portions arranged below each of the filters to store the water and a communicating portion communicating with the adjacent water retaining portions are formed.
The outside air treatment device according to claim 1, wherein the communication portion is provided with the suppression portion. The restraining portion is a rib that regulates the movement of the water between the adjacent water retaining portions.
The outside air treatment apparatus according to claim 2, wherein the rib is provided with a notch portion that allows the movement of the moisture between the adjacent water retention portions by cutting out a part of the rib. .. The outside air treatment device according to claim 2, wherein the suppressing portion is a water retaining body capable of absorbing the water. The outside air treatment device according to any one of claims 1 to 4.
A ventilation device that takes in outside air from the outside to the inside and blows the outside air toward the indoor space.
Ventilation system characterized by being equipped with.

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