JP3002151B2 - Dehumidifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container having a moisture-proof / drip-proof structure, and more particularly to a dehumidifier suitable for dehumidifying equipment installed outdoors.

[0002]

2. Description of the Related Art In a conventional container for the purpose of moisture proof and drip proof, for example, a storage box for electric equipment installed outdoors, a waterproof seal is provided on an opening / closing portion, and an incoming wire portion is protected by a waterproof gland packing or the like. Further, in the above structure, since the outside air may be attracted by the respiratory action due to a temperature difference between the inside and outside of the box and dew may be formed in the box, a ventilation path is provided in the box, and a moisture absorbent provided with a filter function is attached to the ventilation path. There was something like that.

[0003]

However, in the conventional moisture-proof and drip-proof structure, once the internal water vapor concentration becomes high, the structure is adversely affected and the water vapor concentration of the outside air becomes low despite the low water vapor concentration. However, if the ionic impurities contained in the equipment are condensed and condensed, the equipment may malfunction or cause dielectric breakdown.

In the case where a moisture absorbent is attached to the ventilation path, moisture is absorbed irrespective of the breathing action of the box. However, there is a problem that it is necessary and is inefficient.

The present invention has been made to solve such a conventional problem, and an object thereof is to dehumidify the inside of a box having a respiratory action for a long period of time. Another object of the present invention is to provide a dehumidifier having a simple structure and easy handling.

[0006]

According to a first aspect of the present invention, there is provided a dehumidifying apparatus mounted on a wall of a container having a moisture-proof / drip-proof structure and communicating the inside and the outside of the container. A tubular body forming an air passage to be formed; and two waterproof membranes having through holes that are permeable to moisture are arranged at an interval inside the tubular body to form one small chamber in the air passage, and And a vent formed so that the average pore diameter and the moisture permeability of the waterproof membrane on the outer side of the container are larger than the waterproof membrane on the inner side of the container.

Further, in the dehumidifier of the second aspect, the dehumidifier of the first aspect is provided with a vibration means for applying an air vibration pressure to the waterproof film.

According to a third aspect of the present invention, in the dehumidifying apparatus according to the first or second aspect, the cooling unit is directed toward the inside of the container with a waterproof film as a boundary between the ventilation path and the outside of the container. A configuration is provided in which an electronic cooling element facing the heat generating portion is provided.

[0009]

In the dehumidifying device according to the first aspect, a ventilation path is provided in the container so that the breathing action is concentrated in the ventilation path. By arranging the waterproof film at intervals in the ventilation path, it is possible to prevent water droplets from entering the container from the ventilation path. Since the waterproofing membrane has through-holes that can be permeable to moisture, the container can perform a respiratory action concentrated through this ventilation path. In this case, at the time of the suction operation, the outside air is sucked until the internal pressure of the container is balanced with the outside. Thereafter, when the concentration of water vapor in the outside air is higher than the water vapor concentration in the container, the water vapor moves to the container side through the through-holes until it reaches equilibrium. Since the humidity is made smaller than that of the waterproof film on the outside, the water vapor concentration in the small chamber gradually increases, and the movement of the water vapor to the container side becomes slow. Therefore, the increase in the water vapor concentration in the container can be delayed. When the concentration of the water vapor in the container is higher than the concentration of the outside air, the water vapor in the container moves to the outside air. In this case, in the airway,
The waterproof membrane closer to the outside air has a larger average pore size and moisture permeability than the waterproof membrane on the indoor side, and the concentration of water vapor on the outside air does not increase even when the water vapor on the indoor side is discharged. Is done. Thereby, dehumidification in the container can be performed over a long period of time without using power.

In the dehumidifying device according to the second aspect, the air vibration pressure is applied to the surface of the waterproof film, so that the diffusion of the water vapor is promoted, and the water vapor entering the through-holes of the waterproof film from inside the container is positively directed to the outside air. To promote the dehumidifying action.

In a dehumidifier according to a third aspect, in a small room formed by shielding a ventilation path in a plurality of stages with a waterproof film, the temperature of the container side of the small room is lowered and the temperature of the outside air is raised. Therefore, the diffusion of water vapor is promoted, and the water vapor in the container is positively moved to the outside air side, so that the dehumidifying action can be promoted.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the dehumidifier of the present invention will be described below. FIG. 1 is a cross-sectional view showing a dehumidifier of the first embodiment. The dehumidifier A of the present embodiment has a tubular casing (tubular body) 1 and a ventilation body 2 as main components.

The cylindrical casing 1 is mounted in a mounting hole 10a formed in a box (container) 10 to be dehumidified. The cylindrical casing 1 has a flange 12 at one end of a cylindrical body forming an air passage 11. The side 12 is formed to be fastened and fixed to the outside air side 10b of the box 10 by screws 13. The one end side opening is used as a water vapor outlet 14, and a protective net 15 for preventing insects and foreign matter from entering is stretched over the entire surface. Further, the other end side opening of the cylindrical casing 1 is disposed on the indoor side 10c of the box 10 so that the water vapor inlet 16
At the same end, a female thread is provided at the same end, and a fixing ring 17 having a male thread on the outer peripheral surface is formed so as to be screwable. In the figure, reference numeral 18 denotes a rubber packing mounted between the box 10 and the flange 12.

The ventilator 2 prevents the intrusion of water droplets and causes the box 10 to perform a respiratory action and a dehumidifying action in the box 10. The ventilator 2 is formed of two water-permeable waterproof films. Have been. The waterproof membrane is formed by a first membrane 20a having an average pore diameter of 0.1 μm from the box 10 side and a second membrane 20b having an average pore diameter of 0.6 μm via a spacer 21 having a watertight structure. It is detachably mounted in the casing 1. In this state, one small chamber 11a is formed in the ventilation path 11 of the cylindrical casing 1.

Each of the waterproof membranes is formed by punching a disk-shaped one reinforced and backed by a net (not shown). By arranging the waterproof membranes as described above, the inlet 16 of the cylindrical casing 1 is formed. , The moisture permeability increases toward the outlet 14 (first film 6800 g / m ² · day, second film 7500
g / m ² · day). In addition, as each of the waterproof membranes, a porous membrane of ethylene tetrafluoride resin manufactured by Nitto Denko Corporation was used as a registered trademark Microtex.

Next, the operation will be described. The dehumidifier A is formed by attaching the ventilation body 2 to the ventilation path 11, and is inserted into the attachment hole 10 a of the box 10 via the rubber packing 18 and attached. In this state, between the indoor side 10c and the outside air side 10b of the box 10, two waterproof membranes and one
Two small chambers will intervene. First, box 10
Can perform a respiratory action without invading water droplets by the second film 20b. During the suction operation of the box 10, the air is sucked until the internal pressure of the box 10 equilibrates with the outside air. Thereafter, when the water vapor concentration in the outside air is higher than the water vapor concentration in the box, the indoor side 10c Water vapor moves to the side. At this time, since the average pore diameter and the moisture permeability of the waterproof film on the box side are small, the movement of the water vapor becomes extremely slow as the concentration of the water vapor on the indoor side 10c increases.

Next, the indoor side 10c of the box 10
If the water vapor concentration in the room is higher than the water vapor concentration in the outside air, the water vapor on the indoor side moves to the outside air side 10b. In this case, in the small chamber 11a in the ventilation path, the waterproof film closer to the outside air side 10b has a higher moisture permeability than the waterproof film on the indoor side 10c, and the water vapor concentration on the outside air discharges the water vapor on the indoor side. Therefore, the concentration gradient of the water vapor on the outside air side is maintained low, and the movement of the water vapor is promoted. Therefore,
The dehumidifying device A can perform the dehumidifying action of the box 10.

As described above, the dehumidifier A of the present embodiment can dehumidify the inside of a box having a respiratory action for a long period of time. Moreover, the structure is simple and the mounting and handling are very easy.

Next, a description will be given of a second embodiment of the dehumidifier according to the present invention. In this embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. FIG.
FIG. 2 is a cross-sectional view illustrating the dehumidifying device of the present embodiment. The dehumidifier B of the present embodiment is characterized in that the vibration means 3 is provided on the indoor side. That is, in the vibrating means 3, a ring-shaped frame 30 is screwed to an inlet 40 of a cylindrical casing (cylindrical body) 4, and a circular magnet 31 is fixed to the frame 30. In the figure, 30a is a vent, 41 is a flange, 4
2 is an O-ring. A diaphragm 32 is provided at one end of the frame 30 so as to face the first film 20 a with a flexible support member 33, and the diaphragm is provided with a movable coil 34 inserted into the circular magnet 31. 32. The movable coil 34 is connected to an amplifier (not shown) that outputs an air vibration pressure (about a low frequency). The dehumidifier B of the present embodiment constantly applies air vibration pressure to the waterproof membrane from the indoor side 10c to promote the diffusion of water vapor and to disperse the water vapor that enters the through-holes on the outside air side.
b, the dehumidifying effect can be promoted. In the present embodiment, humidity sensors may be provided on the indoor side 10c and the outside air side 10b so that the vibration means is activated when the water vapor concentration in the room becomes higher than that on the outside air side.

Next, a third embodiment of the dehumidifier of the present invention will be described. In this embodiment, the same components as those of the above embodiment are denoted by the same reference numerals and the description thereof will be omitted. FIG. 3 is a cross-sectional view illustrating a main part of the dehumidifying device of the present embodiment. The dehumidifier C of this embodiment is characterized in that the electronic cooling element 5 is provided to the gas 2.

The electronic cooling element 5 is arranged such that the cooling part 50 is directed to the indoor side 10c of the first film 20a and the second film 20b and the heat generating part 51 is directed to the outside air side 10b. And then attached via watertight packing. Each electronic cooling element 5 performs an extremely weak cooling action and heat generation action, and controls the temperature of the small chamber 11a to be low and the temperature on the outside air side to be high, so that the concentration gradient of water vapor in the ventilation path 11 is reduced. It is possible to promote the diffusion of water vapor while tilting to the outside air side, positively move the water vapor to the outside air side, and promote the dehumidifying action. Also in this embodiment, humidity sensors may be provided on the indoor side 10c and the outdoor side 10b so that the electronic cooling element is activated when the water vapor concentration in the room becomes higher than the outside air.

The embodiments of the present invention have been described above.
The specific configuration of the present invention is not limited to the above-described embodiment, and even if there is a design change within a range not departing from the gist of the present invention, the present invention is included in the present invention. For example, the lining material of the waterproof film can be arbitrarily set.

Mounting is not limited to electric products, but also includes a gear case,
It can be performed on containers and the like. Incidentally, it can be attached to a gear case or the like via a trap.

A means for adjusting the water vapor pressure using a capillary tube may be added to promote dehumidification.

The vibrating means is not limited to a movable coil type, but may be any type such as a crystal type or a piezoelectric type.
In addition, the mounting is not limited to the indoor side, and it can be mounted on the outdoor side, both sides on the indoor and outdoor sides, and the air vibration pressure and the vibration frequency can be variously combined such as high and low.

The box may be provided with a plurality of dehumidifiers. Also, at least one of the dehumidifiers has a lower moisture permeability and a higher air permeability than the other dehumidifiers, so that the other dehumidifiers introduce air when dehumidifying,
The overall dehumidifying capacity may be increased.

A fan is provided inside or outside the dehumidifier or between the waterproof membranes, and the fan compresses the air on the indoor side to the waterproof membrane surface to locally increase the water vapor concentration, thereby dehumidifying capacity. May be increased.

[0028]

As described above, the dehumidifier of the present invention has the above-mentioned structure, so that the inside of a container having a respiratory action can be dehumidified for a long period of time. Further, there is obtained an effect that the structure is simple and the mounting and handling are very easy. Further, in the dehumidifying device according to the second aspect, in addition to the above-described effects, an effect that the dehumidifying action can be promoted by applying an air vibration pressure to the waterproof membrane is obtained. Further, in the dehumidifying device according to the third aspect, in addition to the above-mentioned effects, an effect is obtained that the concentration gradient of water vapor in the ventilation passage is inclined to the outside air side to promote the dehumidifying action.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a dehumidifier according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a dehumidifier according to a second embodiment.

FIG. 3 is a cross-sectional view illustrating a dehumidifier according to a third embodiment.

[Explanation of symbols]

 A, B, C Dehumidifier 1, 4 Cylindrical casing (cylindrical body) 2 Vent body 3 Vibration means 5 Electronic cooling element 10 Box (container) 10b Outside air side 10c Indoor side (inside container) 11 Vent path 11a Small chamber 20a 1 film 20b 2nd film 31 Circular magnet (vibration means) 32 Vibration plate (vibration means) 34 Moving coil (vibration means)

Claims (3)

(57) [Claims] 1. A cylindrical body attached to a wall of a container having a moisture-proof / drip-proof structure and forming an air passage communicating between the inside and the outside of the container; Two small cells are arranged at an interval inside the cylindrical body to form one small chamber in the ventilation path, and among the waterproof membranes, the average pore diameter and the moisture permeability of the waterproof membrane on the outer side of the container are determined on the inner side of the container. A ventilator formed so as to be larger than the waterproof membrane of the above. 2. The dehumidifying apparatus according to claim 1, further comprising a vibration means for applying an air vibration pressure to said waterproof film. 3. The electronic cooling element according to claim 1, wherein the cooling unit is directed to the inside of the container and the heat generating unit is directed to the outside of the container with a waterproof film as a boundary of the ventilation path. A dehumidifying device, comprising: