JP2021041367A - Filter for louver device and louver device - Google Patents

Abstract

To provide a filter for a louver device which achieves both a ventilation characteristic in sunny weather and waterproofness in rainy weather, and a louver device using the filter for a louver device.SOLUTION: According to the present invention, a filter 20 for a louver device includes a polymer water-absorbing agent 16, and increases ventilation resistance by the polymer water-absorbing agent inflated with water absorption in rainy weather. Also, according to the present invention, in a louver device, a plurality of openings 21 for ventilation are formed in a height direction, and the polymer water-absorbing agent 16 is arranged corresponding to the height of each opening 21. Even though the ventilation characteristic of the filter can be secured in a dried initial state, when rainwater blows into the louver from the openings 21 of the louver, the polymer water-absorbing agent 16 absorbs the rainwater and is inflated with water absorption to enhance waterproofness by controlling a ventilation passage.SELECTED DRAWING: Figure 2

Description

The present invention relates to a filter for a louver device and a louver device used by being incorporated in a cabinet for storing electrical equipment installed outdoors. As used herein, the term "filter" shall mean a member that regulates a ventilation path.

Since the internal temperature of the cabinet for storing electrical equipment rises due to the heat generated by the internal equipment, a louver device for ventilation is provided. However, since it is not preferable for dust and insects to enter the box through the opening of the louver, it is common to incorporate a mesh-like filter made of a non-woven fabric or the like into the louver device as shown in Patent Document 1. .. However, in a cabinet installed outdoors, rainwater may jump into the cabinet through the opening of the louver device when the wind and rain become strong. Therefore, the outdoor louver device has been devised to prevent rainwater from entering by making the filter finer.

However, if the filter is made finer to improve waterproofness, the ventilation resistance of the filter increases, which causes a decrease in ventilation performance in fine weather. In fine weather, the temperature of the cabinet rises significantly due to direct sunlight, so if the ventilation performance is not sufficient, internal equipment may break down. On the contrary, if the filter is coarsened to increase the air permeability, the waterproof property is lowered. As described above, it has not been easy to achieve both the air permeability and the waterproof property of the filter.

Japanese Unexamined Patent Publication No. 2004-114980

Therefore, an object of the present invention is to solve the above-mentioned conventional problems and to provide a filter for a louver device having both air permeability in fine weather and waterproofness in rainy weather, and a louver device using the same.

The filter for a louver device of the present invention, which has been made to solve the above problems, is characterized in that it is provided with a polymer water absorbing agent, and the ventilation resistance is increased by the polymer water absorbing agent which absorbs and expands in rainy weather. It should be noted that this filter may have a structure in which the compartments are partitioned in the height direction and the polymer water absorbing agent is arranged in the compartments.

Further, the louver device of the present invention is provided with the above-mentioned filter for the louver device, and a plurality of openings for ventilation are formed on the outside in the height direction, and the superabsorbent polymer is arranged corresponding to the height of each opening. It is characterized by that.

According to the present invention, since the volume of the polymer water absorbent is small in the initial state, the air permeability of the filter can be ensured. However, when the wind and rain become stronger and rainwater blows into the louver from the opening of the louver, as in the case of a typhoon, the polymer absorbent absorbs the rainwater and prevents rainwater from entering the cabinet. can do. Then, since the polymer water absorbing agent that absorbs and expands increases the ventilation resistance of the filter, it is possible to further prevent rainwater from entering.

The superabsorbent polymer that absorbs and expands gradually releases moisture in fine weather after that to restore air permeability, but depending on the type of superabsorbent polymer, it may not return to the initial state. In that case, a new one It can be replaced with a new filter to restore air permeability.

It is a perspective view which shows the filter of 1st Embodiment. It is sectional drawing which shows the louver apparatus which incorporated the filter of 1st Embodiment. It is sectional drawing which shows the louver apparatus which incorporated the filter of 2nd Embodiment. It is sectional drawing which shows the state which the super absorbent polymer absorbs and expands, and embodies the air permeability. It is sectional drawing which shows the louver apparatus of the 3rd Embodiment. It is sectional drawing which shows the louver device of 4th Embodiment. It is a partial cross-sectional view of the fifth embodiment. It is explanatory drawing of the bag-shaped filter.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing a filter of the first embodiment, and FIG. 2 is a cross-sectional view of a louver device incorporating the filter. As shown in FIG. 1, reference numeral 10 denotes a box-shaped filter having a small depth dimension and a large vertical and horizontal dimensions, and the outer peripheral vertical wall 11 and horizontal wall 12 are made of a thin-walled resin. The inside is divided into small sections by a vertical partition 13 and a horizontal partition 14. Further, mesh 15 is provided on the front surface and the rear surface.

Granular polymer water absorbent 16 is arranged in each section. In the initial state, it is placed on the horizontal partition 14 of the granular super absorbent polymer 16. Since it is divided into fine sections, the polymer water absorbing agent 16 can be dispersed and arranged substantially evenly over the entire surface of the filter. Further, the polymer water absorbing material 16 does not have to be arranged in all the sections, and may be arranged in only a part of the sections. The partition 13 in the vertical direction is for preventing the polymer water absorbing agent 16 from being unevenly distributed on the left and right, but it is not always essential. On the other hand, the horizontal partition 14 is indispensable. Further, the structure may be such that it can be divided into sections. By doing so, the size of the filter can be freely changed for each usage environment.

The material of the polymer water absorbing agent 16 is not particularly limited, but a typical one is sodium polyacrylate widely used for disposable diapers and the like. However, in addition to this, a gel such as a nonionic water-absorbent resin such as polyvinyl alcohol (PVA) or N-vinylacetamide polymer (PNVA) can also be used. Sodium polyacrylate is said to be able to take up 1000 times the weight of water in a gel. The polymer water absorbent 16 preferably absorbs water but does not absorb moisture in the atmosphere.

If the particle size of the polymer water absorbing agent 16 is made small, the gaps between the particles can be finely filled when water is absorbed, so that the infiltration of rainwater can be more reliably prevented. However, if the particle size is made too fine, it may fall off from the gap of the mesh 15. On the contrary, if the particle size is increased, it is easy to prevent the particles from falling off, but the gaps between the particles cannot be completely filled. Practically preferable particle size is in the range of 0.1 to 3 mm.

The louver device shown in FIG. 2 includes a plurality of openings 21 extending in the horizontal direction on the front surface of the louver main body 20, and a conventional filter 22 is housed on the rear surface side of the louver main body 20. Inside the opening 21, the filter 10 containing the polymer water absorbing agent shown in FIG. 1 is housed with its front surface in close contact with the opening 21. As shown in the figure, a low rising portion 23 is formed in the lower part of each opening 21, but the horizontal partition 14 of the filter 10 is slightly below the rising portion 23, and the granular polymer water absorption. The agent 16 is arranged below the opening 21.

If the polymer water absorbing agent 16 is arranged adjacent to and below the opening 21 of the louver device in this way, the ventilation from the opening 21 is not obstructed by the polymer water absorbing agent 16 in the initial state. However, when rainwater enters the inside of the louver body 20 through the opening 21, the polymer water absorbing agent 16 absorbs the water and prevents the water from reaching the filter 22. Moreover, since the granular polymer water-absorbing agent 16 that has absorbed water expands upward and blocks the ventilation path of the opening 21, rainwater is blocked by the expanded polymer water-absorbing agent 16 and flows down below the filter 10. Although this reduces the ventilation performance of the louver device, there is no problem because the cabinet is cooled by rainwater in rainy weather.

FIG. 3 is a cross-sectional view showing a louver device incorporating the filter of the second embodiment. In this embodiment, the filter 24 in which the polymer water absorbing agent 16 is arranged inside the mesh-shaped filter such as a non-woven fabric is housed inside the louver main body 20. As shown, in this embodiment, the filter 24 is arranged with a space 25 between it and the opening 21. Further, the polymer water absorbing agent 16 is arranged so as to correspond to the height of each opening 21, so that when rainwater infiltrates through the opening 21, the polymer water absorbing agent 16 is surely in contact with the polymer water absorbing agent 16. FIG. 4 shows a state in which the polymer water absorbing agent 16 absorbs water and expands to reduce air permeability.

FIG. 5 is a cross-sectional view showing the louver device of the third embodiment. In this embodiment, a filter 27 containing the polymer water absorbing agent 16 is attached to the lower end of the opening 21. As shown in FIG. 8, the polymer water absorbing agent 16 is housed in a water-permeable bag-shaped filter 27. Therefore, when it is exposed to rainwater, the polymer water absorbing agent 16 absorbs water and the volume of the filter 27 expands, narrowing or blocking the ventilation path of the opening 21 and reducing the air permeability. Further, as in the first embodiment shown in FIG. 2, the conventional filter 22 is housed on the rear surface side of the louver main body 20.

In the fourth embodiment shown in FIG. 6, a filter 27 containing the polymer water absorbing agent 16 is attached to the upper end of the rising portion 23 below the opening 21. In this case as well, the operation is the same as in the third embodiment shown in FIG.

FIG. 7 is an enlarged cross-sectional view showing a fifth embodiment, in which an L-shaped holding member 28 is formed at the lower or middle position of the back surface of the opening 21 to hold the filter 27 containing the polymer water absorbing agent 16. It is a structure. In this embodiment, when it comes into contact with rainwater, the polymer water absorbing agent 16 absorbs water and the filter 27 expands upward to narrow or block the ventilation path of the opening 21 and narrow or block the ventilation path of the opening 21. In the embodiment of FIG. 7, the filter 27 can be held more reliably, and the filter 27 can be easily replaced.

As described above, according to the present invention, the air permeability of the filter can be ensured in the dry initial state, but when the wind and rain become strong and rainwater blows into the inside of the louver from the opening 21 of the louver. The polymer water absorbing agent 16 absorbs rainwater and expands by absorbing water to increase the ventilation resistance. Therefore, it is possible to prevent rainwater from entering the inside of the cabinet. The polymer water absorbent 16 gradually releases moisture and recovers the air permeability in the subsequent fine weather, but if it does not return to the initial state, it may be replaced with a new filter to restore the air permeability.

10 Filter 11 Vertical wall 12 Horizontal wall 13 Vertical partition 14 Horizontal partition 15 Mesh 16 Superabsorbent polymer 20 Louver body 21 Opening 22 Conventional filter 23 Rising part 24 Filter 25 Space 27 Bag-shaped filter 28 Holding member

Claims (3)

A filter for a louver device, which is equipped with a polymer water absorbent and is characterized in that the ventilation resistance is increased by the polymer water absorbent which absorbs and expands in rainy weather. The filter for a louver device according to claim 1, further comprising a compartmentalized portion in the height direction and arranging a polymer water absorbing agent in the compartmentalized portion. The louver device provided with the filter for the louver device according to claim 1 or 2, wherein a plurality of openings for ventilation are formed on the outside in the height direction, and a superabsorbent polymer corresponds to the height of each opening. A louver device characterized by being placed in a louvered manner.

Images