KR20200000843A - Humidity Proof System of Electric Control Box - Google Patents

Abstract

The present invention relates to a system for preventing moisture of an electric control box, which suppresses active inflow of external moisture. The system comprises an electric control box case, an internal control panel, an introduced air hole, a discharged air hole, a discharge motor, and a fan.

Description

Humidity Proof System of Electric Control Box

The electrical control box heats up inside if the capacity is large. So put a fan on the top and an air hole on the bottom. However, when the rainy season in summer, moisture breaks down. The present application relates to techniques for 'removing', 'blocking' or 'reducing' this moisture.

In hot and humid environments, moisture causes electrical devices to short-circuit. In the case of moisture, the engine of an automobile also produces smoke due to incomplete combustion. Moisture 'removal' techniques are already known, but their 'blocking' or 'lowering' techniques are unknown or have not yet been applied to this moisture control technology.

Patent Publication No. 10-2018-0024143 (published date 201838, Ventilation and Cooling Control System of Battlefield) is a technology with 'dehumidifier' for removing moisture from the battlefield. Patent Registration No. 10-0443992 (published date 2004812, dehumidifier of inlet air to remove moisture contained in air entering the internal combustion engine of a vehicle), selectively connects two dehumidification tanks to the inlet and outlet do. When connected to the intake port, the activated carbon in the tank absorbs moisture from the inlet air. When the activated carbon exceeds the absorption capacity, the tank is connected to the outlet to dry out the accumulated moisture. In addition, CN 206061328 (U) (2017-03-29, Novel electrical control cabinet) and CN 105283043 (B) (2018-03-02, Outdoor communication cabinet with good moisture-proof and radiating performance), but the configuration is complicated. It is not worth using.

Not applicable

In addition to improving the 'removal' technology of inflowing moisture, the company is able to 'block' or 'reduce' the inflow of moisture from the beginning to eliminate the side effects.

Firstly, by selectively repeating the two activated carbon connecting fans, one absorbs the incoming moisture and the other dries the absorbed accumulated moisture. It is an improvement of the existing technology.

Or, secondly, a corrugated hose starting from the inlet air hole to the vent outlet hole passes through the inside of the electrical control box and cools the internal heat in the course of passing the external inlet air through the corrugated hose. It is solved by separation by space. Outside incoming moisture is only present in the corrugated hose and has no effect inside the control box.

In addition, third, in the case of a summer rainy season, when the relative humidity exceeds a certain level, by stopping the operation of the ventilator may be applied to enter the outside inlet air only by the convection action. Is to apply separation by time. When the temperature drops, the temperature inside the control box does not reach dangerous levels, so it is sufficient to cool only by natural convection, not by cooling the fan. And because the internal temperature depends only on natural convection, the dew point rises more moderately than the external temperature, so there are no side effects such as short circuits due to moisture.

By selectively repeating the two activated carbon connection fans, the incoming moisture is 'removed'. The external inlet air passes through the corrugated hose, which essentially 'blocks' the ingress of moisture into the box itself. When the humidity exceeds a certain level, the ventilator is stopped, and the side effects caused by moisture are 'reduced' due to the 'small' moisture inflow due to natural convection and the 'dew point rise' caused by the appropriate temperature rise.

1 is an open electrical control box diagram
2 is an explanatory view of the heat generation of the components inside the electrical control box
3 is a closed electrical control box diagram
4 is a drawing of Patent Publication No. 10-2018-0024143 (published date 201838, battlefield ventilation and cooling control system)
5 is a patent registration number 10-0443992 (notice date 2004812, moisture removal device of the intake air to remove moisture contained in the air flowing into the internal combustion engine of the vehicle)
6 is a selective repeat operation of the two activated carbon connection ventilator;
7 is a conceptual view of adding a pleated hose between the inlet air hole and the exhaust hole of the vent or stopping the ventilator when the relative humidity exceeds the summer rainy season.
8 shows a relationship between temperature and saturation humidity
9 is a collection of practical embodiments of a corrugated hose additional configuration between an inlet air hole and a vent outlet hole;

1 (open electrical control box diagram), FIG. 2 (heat generation guidance diagram of the parts inside the electrical control box), and FIG. 3 (closed electrical control box diagram), the air entering through the lower outer inlet air hole Cooling the heat generating components therein is discharged to the outside by the rotation of the fan of the upper fan.

As explained in the previous task, the components inside the electrical control box short-circuit due to moisture, such as during the summer rainy season. In the case of moisture, the engine of an automobile also produces smoke due to incomplete combustion.

In the preceding patent documents, the inlet moisture removal 'dehumidifier' is added (see FIG. 4), or two moisture removal tanks are selectively connected to the inlet and outlet of the engine (see FIG. 5) to remove the inlet moisture. . However, this configuration is complex and difficult to implement.

Without adding a dehumidifier as shown in Figure 4, it is possible to apply the improved configuration as shown in Figure 5 without adding complicated valves and sensors as shown in FIG.

Example 1

As shown in FIG. 6, activated carbon filters or zeolite filters (Ammonia-X filters), which are moisture adsorption materials, are respectively connected to two fans, and two activated carbon connection fans may be selectively and repeatedly operated.

Moisture absorption limit capacity of activated carbon filters or Ammonia-X filters is already set, so there is no need to detect when the limit capacity is reached by the sensor. Allow the two activated carbon linking fans to work interchangeably before reaching the limit capacity. If one is absorbing moisture, the other is to dry out the accumulated moisture. The warmed air is passed through the inside of the control box to dry out the accumulated moisture. The air that has passed through the control box is already dehumidified and hot due to the heat of the internal components, which causes the accumulated moisture to dry out much faster than it does.

For example, in Fig. 6, when entering the case through the upper air-hole at the time T1, air enters with dehumidification of the moisture adsorption filter and passes through the middle of the case, that is, the other air- The hole is warmed up by the heat inside the case in the process of reaching the air-hole below.

The internal air, which has already been dehumidified but warmed up, reaches the other side, that is, the other air-hole, that is, the lower air-hole, and is finally discharged by the rotation of the fan. Holes In other words, the moisture adsorbent filter in the bottom air-holes is dried.

At the time T2, it now reverses from the lower air-hole and reaches the upper air-hole, the other air-hole on the opposite side, and is discharged in the same way. Once again T1 hour is discharged in the manner of T1 hour seen earlier.

In this way, the air direction of the air-hole is reversed by alternating T1 and T2, such as T1, T2, and T1, then T1, and then T1, T2, T1, T2, ... Change direction.

Example 2

As shown in the left figure of FIG. 7, a crimped hose between the inlet air vent and the vent outlet vent can be placed inside the electrical control box.

As the corrugated hose disposed inside the electrical control box is heated by the heat of the component inside the control box, the outside air passing through the corrugated hose is cooled, thereby indirectly cooling the interior of the electrical control box. Rather than a hot radiator warming the surroundings, the relatively cold outside air passes through it, causing the cold radiator to cool the surroundings.

For example, in Figure 7 From the left The hose, starting from the lower inlet air-hole, passes through the inside of the control box, ie inside the case, to the upper outlet air-hole. Corrugated hoses effective for heat transfer are preferred as shown in FIG.

As the outside air passes through the case inner hose and absorbs the hot heat inside the case by heat transfer, it is finally discharged by the fan operation installed in the motor to the upper discharge air hole.

The principle of spatial separation used in TRIZ is to be applied. In order to solve the problem, by separating the problem situation spatially, that is, by separating the passage through which the moisture passes, it is possible to isolate and solve the problem.

The crimped hose not only serves as a passage for the outside air, but also serves to separate the outside air from the inside of the electrical control box.

As shown in the figure below, it is an extraction of the principles of the 40 inventions. If the temperature rises on the vertical axis but harm occurs on the horizontal axis, one of the solutions is extraction.

Also, as shown in the figure below, it intervenes in the middle of the aluminum corrugated tube, a third substance, according to TRIZ standard solution 1-2-1 to block harmful actions and ensure that only beneficial actions reach the product. It also applies the solution of applying the principle. The problem was solved by setting up an aluminum corrugated tube, a third substance, to replace the OZ (Operational Zone) as an analysis target.

Example 3

As shown in the right figure of Figure 7, by stopping the operation of the ventilator at all when the relative humidity is high in the summer rainy season, it is possible to reduce the moisture fundamentally.

As described in the solution to the above problem, when the temperature drops due to rain, the temperature inside the control box does not reach the dangerous level, so it is sufficient to cool only by natural convection, not by operating the fan to cool it. And because the internal temperature depends only on natural convection, the dew point rises more moderately than the external temperature, so there are no side effects such as short circuits due to moisture.

This dew point description is shown in FIG. 8. At 28 degrees, dew forms, but at 29 degrees the dew point rises and dew does not form. Therefore, by allowing only cooling by convection, it is possible to just leave the internal temperature above 29 degrees, that is, it is not necessary to operate the fan, but if it gets too hot like 35 degrees or 40 degrees, that is, after the rain When the weather gets hot again, only then can you start the fans again. In order to distinguish this, it is necessary to further include a relative humidity sensing switch for turning on and off the fan according to the external relative humidity. TRIZ's Root Cause Analysis (RCA) led to the differentiation of these concepts.

For example, in Figure 7 On the right However, during the T1 time when the external relative humidity is low, the air entering the lower air-hole is cooled by the natural convection to the upper exhaust air-hole, and the fan installed in the motor is operated only during the T2 time when the external relative humidity is high. .

In Patent Application No. 10-2018-43666 filed by the applicant first, Root Cause Analysis (RCA), component-trimming, small dwarf technique [MMD (Modeling with Miniature Dwarfs), SLP ( Smart Little People), the medium C is a ventilator that must be turned on at some time and off at other times.

It was found that this problem was solved by separation of the liver.

As shown in the figure below, we see a physical and technical contradiction that C must transfer heat to absorb heat from the inner panel, but C must not transfer heat to prevent the diffusion of external moisture. Physical contradictions, both of which should and should not be transferred, should be converted into technical contradictions, absorbing heat from the panel, while not spreading moisture.

In order to solve the above contradictions, the TRIZ component-trimming process and the small dwarf technique (MMD, SLP) were applied as follows.

Through the component-trimming process as shown in the following figure, it was found that the object of the trimming was the C medium, and thus the component could be intensively analyzed. The fan was designated as an X-element when OT (Operational Time) as TRIZ was found.

The small dwarf technique (MMD, SLP) is anthropomorphic representation of all the components. It sees the air coming in from the outside as a small dwarf and shows the process of bringing the inside of the dwarf with the external moisture. If the ventilator is not turned on on a rainy day, small dwarfs (outside air) will slowly warm up and pass through keeping a small number. Thus, because there are only a few small dwarfs (outside air), they find that the amount of external moisture they bring in is not only small, but also moves slowly, resulting in much less dew condensation as the dew point rises.

Not applicable

Claims (1)

An electrical control box case, an internal control panel, an inlet air-hole, an outlet air-hole, an outlet motor, a fan installed in the outlet motor, starting from the inlet air-hole and connecting to the outlet air-hole and the electrical control Electrical control box moisture prevention system, characterized in that the hose disposed inside the box, the outside air passes through and finally discharged to the outside by the fan operation

Images