KR102100128B1 - Distribution board having dehumidification function by electrolytic - Google Patents

Abstract

The present invention relates to a distribution board having a dehumidification function. According to the present invention, the humidity in the air in the distribution board is removed by electrolysis by means of a polymer electrolyte membrane. Accordingly, no discharge water is generated, no noise is generated, and the distribution board can be driven with low power even at a low temperature below zero. According to the present invention, the distribution board having the electrolytic dehumidification function is configured to include a dehumidifying device installed on the outside panel of the distribution board or inside the door of the distribution board. The dehumidifying device includes: a housing provided with an inflow vent supplied with the air in the distribution board and an exhaust vent for water vapor discharge; an electrolysis module disposed in the housing, electrolyzing the moisture in the air supplied to the inflow vent into hydrogen and oxygen, and moving the hydrogen to the exhaust vent after the electrolysis; and a controller controlling the power that is applied to the electrolysis module.

Description

DISTRIBUTION BOARD HAVING DEHUMIDIFICATION FUNCTION BY ELECTROLYTIC with electrolysis dehumidification function

The present invention relates to a water switchboard equipped with an electrolytic dehumidifying function, by electrolyzing and removing moisture contained in the air inside the water switchboard using a polymer electrolyte membrane, so that no discharge water and noise are generated and low-power operation is possible even at low temperatures below zero. It relates to a water switchboard equipped with an electrolytic dehumidification function.

Domestic approved rated voltages such as 22.9KV, 6.6KV, 3.3KV, 440V, and 380/220V, such as transformers, circuit breakers, and capacitors, are always applied to the switchboard.

A plurality of busbars are provided inside the switchboard. The busbar is a strip-shaped conductor made of copper or aluminum, and a plurality of busbars are fastened with bolts or the like as necessary to provide a path through which electric current passes.

The internal temperature of the switchboard can be increased to high temperature compared to the ambient temperature at all times, such as heat generated by no-load loss or load loss, heat generated by extinguishing when the circuit breaker is operated, heat generated by charge accumulation such as a condenser, and heat generated by intrinsic resistance when operating an electric device. do.

On the other hand, in the case of a switchgear installed outdoors, condensation occurs due to cold air at night, thereby increasing the risk of power waste and accidents, such as over-humidity inside the switchgear and electrical safety accidents caused by water droplets. .

As a countermeasure to prevent such condensation, there are electronic dehumidifiers, space heaters, and methods using silica gel.

Among these, the electronic dehumidifying device includes a compressor method, a desiccant method, a hybrid method having a compressor method and a desiccant method, and a condensation method, but a drain treatment is required to discharge water generated during dehumidification. There is a disadvantage that it is large and uses a lot of power.

In addition, the space heater is intended to prevent insulation deterioration and heat deterioration due to moisture and temperature by raising the temperature inside the switchboard to decrease relative humidity, but there is a disadvantage that a lot of electrical energy is consumed to operate the space heater at low temperatures. .

In addition, the dehumidification method using silica gel has low dehumidification efficiency, and there is a disadvantage that the silica gel needs to be periodically replaced.

On the other hand, as a technology for a water switchgear having a dehumidifying function, a water/switchboard system having a dehumidifying function using a thermoelectric element and a control method thereof are disclosed in Patent No. 10-1670255.

The above technology automatically controls the dehumidifying unit, control unit and power control unit based on information from the humidity measurement sensor inside the enclosure, prevents condensation of moisture by dehumidifying using eco-friendly thermoelectric elements that do not require refrigerant, and air fans. It is characterized in that it is dehumidified through ventilation, but there is a problem that a lot of power is applied to the thermoelectric element at low temperature, noise is generated according to the operation of the air fan, and a drain device for discharging the collected water is required.

In addition, a composite dehumidification switchgear was disclosed in Korean Patent Publication No. 10-1753837.

In the above technology, the dehumidified air is supplied to the inside or outside of the water switchboard according to the movement of the guide, and the blower fan is installed in the internal air circulation port, and a heating unit and a plurality of units installed to bind in a certain number of units from the plate It includes two insulating and dehumidifying filling cells, and various devices must be configured in the front part and the inside of the switchgear housing, a plurality of devices must be organically operated, and there is a problem in that the filling cells and the like must be periodically replaced.

KR 10-1670255 B1 (2016. 10. 24.) KR 10-1753837 B1 (June 28, 2017)

The present invention was created to solve the problems of the prior art, and the problem to be solved in the present invention is to electrolyze the air inside the switchgear to decompose the moisture on the anode side into hydrogen and oxygen, and the decomposed hydrogen A water distribution panel equipped with an electrolytic dehumidifying function capable of naturally removing moisture even without the configuration of a blower fan by being configured to pass through the polymer electrolyte membrane and move to the cathode side, and the hydrogen moved to the cathode side is combined with oxygen in the air to be exhausted in the form of water vapor. To provide.

In addition, as the water in the air is electrolyzed and dehumidified, it can be driven with low power even at low temperatures, and as the water is exhausted in the form of water vapor at the cathode side, a water distribution panel equipped with an electrolytic dehumidification function that does not require a drain device is provided Having

In order to solve the above problems, a water switchboard equipped with an electrolytic dehumidifying function according to the present invention includes a dehumidifying device installed inside an outer panel or a door of the water switchboard, and the dehumidifying device receives air inside the switchgear. A housing formed with an inflow vent and an exhaust vent for discharging water vapor; An electrolysis module disposed inside the housing, electrolyzing moisture in the air introduced into the inlet through hydrogen and oxygen, and moving the electrolyzed hydrogen into the exhaust through hole; And it characterized in that it comprises a controller for controlling the power applied to the electrolysis module.

Here, the electrolysis module is an anode electrode; A cathode electrode disposed corresponding to the anode electrode; And a solid polymer electrolyte membrane installed between the positive electrode and the negative electrode.

In addition, the anode electrode is disposed on the inlet through side of the housing, and the cathode electrode is disposed on the exhaust through side of the housing.

In addition, it is further configured to further include a humidity sensor that detects the humidity value inside the switchgear, and the controller controls the power supply time applied to the electrolysis module based on the humidity value detected by the humidity sensor. do.

In addition, it characterized in that the moisture-permeable waterproof resin is installed inside the vent hole of the housing.

According to the present invention, the water in the air is decomposed into hydrogen and oxygen by electrolysis, and the decomposed hydrogen is contacted with the air on the cathode side and discharged as water vapor, so that the flow of air can be controlled without configuring a blower fan and a drain. There is an advantage in that it can be manufactured in a small size.

In addition, as the moisture in the air is removed by electrolysis, there is an advantage of dehumidifying with low power even at low temperatures.

1 is a state diagram of a dehumidifying device applied to a switchgear equipped with a dehumidifying function according to the present invention.
2 is a perspective view of a dehumidifying device applied to a switchgear equipped with a dehumidifying function according to the present invention.
3 is a schematic internal configuration diagram of a dehumidifying device applied to a switchgear equipped with a dehumidifying function according to the present invention.
4 is a side cross-sectional view of a dehumidifying device applied to a water switchgear equipped with an electrolytic dehumidifying function according to the present invention.
5 is a view showing the principle of the electrolysis module in the dehumidifying device applied to the switchgear equipped with an electrolytic dehumidifying function according to the present invention.
Figure 6 is a graph of the results of testing the dehumidifying device applied to the switchgear equipped with an electrolytic dehumidifying function according to the invention according to the temperature.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a water switchboard equipped with a dehumidifying function that can be driven with low power even at low and low temperatures without generating discharge water and noise by electrolyzing and removing moisture contained in the air inside the water switchboard using a polymer electrolyte membrane.

1 is a view showing an installation state of a dehumidifying device applied to a switchgear equipped with a dehumidifying function according to the present invention, Figure 2 is a perspective view showing a dehumidifying device applied to a switchgear equipped with a dehumidifying function according to the present invention, Figure 3 is It shows the schematic internal configuration of the dehumidifying device.

1 to 3, the dehumidifying device 2 applied to the water switchboard equipped with the dehumidifying function according to the present invention includes a housing 10, an electrolysis module 20, a controller 30, and a humidity sensor 40 ) And a moisture-permeable waterproof resin (50).

The housing 10 has a space portion formed therein, and an intake through hole 11 through which the air inside the water switchboard 1 is introduced is formed in the front portion, and an exhaust through hole 12 through which moisture in the air is discharged in the form of water vapor 12 It is formed, it is attached to the door or the outer panel of the switchgear (1) is installed.

The housing 10 is provided with a power port 14 for power connection, a communication port 15 for communication connection, and a humidity control switch 31.

The shape of the housing 10 may be formed of a rectangular parallelepiped, as shown in the drawing, but may be configured in various forms according to the installation position of the switchboard.

The electrolysis module 20 is installed inside the housing 10 and performs a function of electrolyzing and releasing moisture in the air according to application of electric energy.

4 is a side cross-sectional view of a dehumidifying device applied to a water switchgear equipped with an electrolytic dehumidifying function according to the present invention.

4, the electrolysis module 20 applied to a water switchboard equipped with an electrolytic dehumidifying function according to the present invention includes an anode electrode 21, a cathode electrode 22, a polymer electrolyte membrane 23 and an insulator (24, 25).

At this time, the electrolysis module 20 is disposed in a separate space separated by a partition plate 13 among the housing 10.

For example, the electrolysis module 20 is disposed on the upper side of the housing 10 separated by the partition plate 13, and the controller 30 and the humidity in the lower space of the partition plate 13 The sensor 40 and the like are arranged.

The positive electrode 21 and the negative electrode 22 are respectively connected to the positive and negative poles of the DC power supply, and the negative electrode 22 is disposed at a predetermined interval with respect to the positive electrode 21. .

When power (direct current) is applied to the positive electrode 21 and the negative electrode 22, chemical reactions are performed at the positive electrode 21 and the negative electrode 22, respectively. As the electrons are lost and oxidized, oxygen gas is generated, and in the cathode electrode 22, hydrogen gas is generated as water in the air gets electrons and is reduced.

At this time, assuming that there is no membrane separating between the anode electrode 21 and the cathode electrode 22, oxygen gas and hydrogen gas generated by electrolysis are mixed.

The positive electrode 21 and the negative electrode 22 are formed of porous electrodes.

The porous electrode is prepared by dispersing carbon fiber in water to prepare a carbon fiber sheet shape, and impregnating the produced carbon fiber sheet shape with a thermosetting resin to prepare a resin impregnated sheet, and then the resin impregnated sheet at 100 to 400°C. After heating and pressing at a temperature to prepare a resin cured sheet, the resin cured sheet is carbonized at a temperature of 1,000° C. or higher to produce it.

The porous electrode manufactured as described above can be applied in a high temperature/low humidity condition from a low temperature/humidity condition. Accordingly, it has the advantage of being able to electrolyze the moisture in the air with low power even in the cold/humidity conditions of the winter season.

The polymer electrolyte membrane 23 divides the space forming the positive electrode 21 and the negative electrode 22 through the installation between the positive electrode 21 and the negative electrode 21, and at the same time, of the positive electrode 21 The hydrogen gas is moved to the cathode electrode 22, and has low electrical resistance and excellent mechanical strength.

That is, the polymer electrolyte membrane 23 has a characteristic of cation exchange, 1) excellent proton conductivity, 2) prevention of crossover of the electrolyte, 3) strong chemical resistance, 4) strengthening of mechanical properties and/ Or 4) has a characteristic of low swelling ratio. These polymer electrolyte membranes are classified into fluorine-based, partially fluorine-based, and hydrocarbon-based membranes. In the case of partially-fluorine-based polymer electrolyte membranes, they have a fluorine-based main chain, and thus have excellent physical and chemical stability and high thermal stability. In addition, the partial fluorine-based polymer electrolyte membrane has the advantages of a hydrocarbon-based polymer electrolyte membrane and a fluorine-based polymer electrolyte membrane at the same time as the cation transfer functional group is attached to the end of the fluorine-based chain, like the fluorine-based polymer electrolyte membrane.

Accordingly, the hydrogen gas of the cation generated in the anode electrode 21 is moved to the cathode electrode 22 side by the polymer electrolyte membrane 23, and the hydrogen gas of the cation moved to the cathode electrode 22 side is oxygen gas of the anion. Is converted into water vapor.

The chemical reaction between the positive electrode 21 and the negative electrode 22 is represented by the following Chemical Formula 1.

According to Chemical Formula 1, water vapor (water) is electrolyzed on the anode electrode 21 and the anode side to generate hydrogen gas of the cation and oxygen gas of the anion, and on the contrary, the hydrogen gas of the cation on the cathode electrode 22 side In combination with oxygen gas, water vapor (water) is generated.

5 is a view showing the principle of the electrolysis module in a dehumidifying device applied to a switchgear equipped with an electrolytic dehumidifying function according to the present invention.

Referring to Figure 5, the anode electrode 21, water vapor (water) is decomposed into hydrogen and oxygen to be dehumidified, and on the cathode electrode 22 side, hydrogen and oxygen are combined to be humidified.

At this time, since the hydrogen gas generated by electrolysis at the anode electrode 21 is moved to the cathode electrode 22 side by the polymer electrolyte membrane 23, a negative pressure at which air is reduced is formed at the anode electrode 21 side, Due to the negative pressure formed, air inside the water switchboard is introduced into the anode electrode 21 through the inflow through hole 11 of the housing 10.

In addition, on the cathode electrode 22 side, hydrogen gas moved by the polymer electrolyte membrane 23 is combined with oxygen gas to generate water vapor, but due to the inflow of hydrogen gas, a positive pressure higher than atmospheric pressure is formed, and the positive pressure is formed. The generated water vapor is discharged out of the housing 10.

Incidentally, when power is applied to the electrolysis module 20, the water vapor of the anode electrode 21 is electrolyzed, and hydrogen gas is moved to the cathode electrode 22 by the polymer electrolyte membrane 23, whereby the anode electrode 21 ), air flow is generated from the cathode electrode 22, and hydrogen gas is combined with oxygen gas in the cathode electrode 22 to generate water vapor, but the water vapor generated by the air flow generated by negative pressure and positive pressure goes outside the water switchboard. Will be released.

Accordingly, the anode electrode 21 is disposed so as to be positioned on the inflow through hole 11 side of the housing 10, and the cathode electrode 22 is positioned on the exhaust through hole 12 side of the housing 10. When arranged, the air inside the housing 10 is electrolyzed by the electrolysis module 20 without having a separate blowing fan, so that it is naturally discharged to the outside in the form of water vapor.

Therefore, according to the electrolysis module 20, since water is not generated by condensation of water vapor, there is no need for a separate drain device for discharging generated water, and miniaturization is possible by omitting the blower fan and the drain device. In addition to being possible, there is an advantage that noise is not generated.

Insulators 24 and 25 are respectively coupled to the upper and lower portions of the electrolysis module 20 to fix the positive electrode 21, the negative electrode 22 and the polymer electrolyte membrane 23, and the positive electrode 21 And the power applied to the cathode electrode 22 is not transmitted to the housing 10.

The controller 30 controls the power applied to the electrolysis module, and transmits and receives data and control signals through communication with a remote external device, a man-machine interface (MMI) 30.

Here, the MMI 30 may be formed of a server or a user terminal that manages the switchgear.

The controller 30 controls the power input through the power port 14 to be supplied to the electrolysis module 20. At this time, the controller 30 is configured to control the power supply time applied to the electrolysis module based on the set humidity value.

That is, the controller 30 compares the humidity value set from the humidity control switch 31 with the humidity value detected inside the water switchboard and supplies power applied to the electrolysis module to maintain the humidity value inside the water switchboard with the set humidity value. Time is controlled.

In other words, when the set humidity value is relatively higher than the detected humidity value, the controller 30 stops the application of power to the electrolysis module or controls the application of power on/off at regular intervals. Conversely, when the set humidity value is relatively lower than the detected humidity value, the controller 30 controls so that power applied to the electrolysis module is continuously supplied.

A humidity sensor 40 for detecting a humidity value is further included in the water switchboard.

At this time, the humidity sensor 40 may be installed under the partition plate 13 inside the housing 10, but may also be disposed inside the switchboard using a signal line.

The humidity sensor 40 is formed by sequentially stacking a substrate, a lower electrode, a moisture-sensitive dielectric, and an upper electrode, and sense humidity by sensing a difference in capacitance between electrodes according to a change in the dielectric constant of the moisture-sensitive dielectric.

On the other hand, the cathode electrode 22 of the electrolysis module 20 is in direct contact with the outside air of the water distribution panel by the exhaust hole 12 of the housing 10, and at this time, rainwater outside the water switchboard through the exhaust hole 12 Alternatively, foreign matter such as worms may be introduced into the housing 10.

Accordingly, a moisture-permeable waterproof resin 50 for discharging water vapor generated from the inside is installed in the exhaust through hole 12 of the housing 10 while preventing the inflow of foreign substances.

The moisture-permeable waterproof resin 50 passes moisture, but blocks water and wind. Water vapor generated at the cathode electrode 22 side is discharged to the outside, and foreign matter such as rainwater or worms that may be introduced from outside passes. Do not do.

Preferably, the moisture-permeable moisture-proof paper 50 may be replaced with a variable moisture-proof paper.

The variable moisture-proof paper performs a function of passing or blocking moisture according to the relative humidity.

6 is a graph of the results of testing the dehumidifying device applied to a water switchgear equipped with an electrolytic dehumidifying function according to the present invention according to temperature, and a commercial desiccant type electronic dehumidifying device as a comparison object was used.

In addition, the test was performed at an external temperature of 10°C and 35°C, respectively, and was carried out for 24 hours at 50 liters of enclosure size and 90% RH of internal relative humidity.

Referring to the accompanying Figure 6, when using the dehumidifying device according to the present invention, the relative humidity was reduced to a minimum of 22%RH and 20%RH as time passed, but with the conventional electronic dehumidifying device, 60%RH and 62% As measured by RH, it was found that the humidity was not lowered below 60%RH.

According to the present invention, the moisture in the air is decomposed into hydrogen and oxygen by electrolysis, and the decomposed hydrogen contacts the air on the cathode side and is discharged as water vapor, so that the air inside the water distribution panel can be discharged to the outside without configuring a blower fan. There is an advantage in that the configuration of the drain can be omitted by directly discharging the moisture in the air.

In addition, as the blower fan and the drain are omitted, it can be manufactured in a small size, and it has the advantage of being able to dehumidify with low power even at low temperatures by removing the moisture in the air by electrolysis.

Although the preferred embodiments of the present invention have been described above, the scope of rights of the present invention is not limited to this, and it should be understood that the scope of rights of the present invention extends to those that are substantially equivalent to the embodiments of the present invention. Various modifications can be carried out by those skilled in the art to which the invention pertains without departing from the spirit of the invention.

1: Switchgear 2: Dehumidifier
3: MMI 10: Housing
11: inlet through 12: exhaust through
13: partition plate 20: electrolysis module
21: anode electrode 22; Cathode electrode
23: polymer electrolyte membrane 24: insulator
30: controller 40: humidity sensor
50: waterproof breathable resin

Claims (5)

In the switchboard, the dehumidifying device is installed inside the outer panel or door,
The dehumidifying device,
A housing formed with an inlet through which air is introduced into the water switchboard and an exhaust through which discharges water vapor;
An electrolysis module disposed inside the housing, electrolyzing moisture in the air introduced into the inlet through hydrogen and oxygen, and moving the electrolyzed hydrogen into the exhaust through hole;
A humidity sensor for detecting a humidity value inside the water switchboard; And
A controller that controls power applied to the electrolysis module;
It includes,
The electrolysis module,
Anode electrode;
A cathode electrode disposed corresponding to the anode electrode; And
A polymer electrolyte membrane installed between the anode electrode and the cathode electrode;
It includes,
The controller,
Controls the power supply time applied to the electrolysis module so as to maintain the humidity value inside the water distribution panel by comparing the set humidity value and the humidity value detected inside the water distribution panel, but the set humidity value is relative to the detected humidity value. If it is high, the application of power to the electrolysis module is stopped, or the application of power is controlled on/off at regular intervals. When the set humidity value is relatively lower than the detected humidity value, the power applied to the electrolysis module is continuously Controlled to be supplied,
In the electrolysis module,
An anode, a cathode electrode and a polymer electrolyte membrane are fixed, and an insulator is further provided to prevent power applied to the anode and cathode electrodes from being transmitted to the housing.
The electrolysis module is disposed on the upper side separated by the partition plate among the housing, the controller and humidity sensor is equipped with a electrolytic desorption switchboard, characterized in that disposed on the lower side.
delete The method according to claim 1,
The anode electrode is disposed on the inlet through side of the housing,
The cathode electrode is a switchgear equipped with an electrolytic dehumidifying function, characterized in that disposed on the exhaust vent side of the housing.
delete The method according to claim 1,
A water switchboard having an electrolytic dehumidifying function, characterized in that a moisture-permeable waterproof resin is installed inside the exhaust vent of the housing.

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