WO2020256299A1

WO2020256299A1 - Mold transformer cooling device

Info

Publication number: WO2020256299A1
Application number: PCT/KR2020/006818
Authority: WO
Inventors: 이종순
Original assignee: 이종순
Priority date: 2019-06-17
Filing date: 2020-05-27
Publication date: 2020-12-24
Also published as: KR102259422B1; CN216871714U; KR20200143911A

Abstract

A mold transformer cooling device of the present invention comprises: an enclosure which includes an intake port formed through a lower part thereof and an exhaust box formed at an upper part thereof to surround a mold transformer; a lower housing which surrounds a high voltage terminal charging portion and windings of the mold transformer in the enclosure; an air flow inducing plate for guiding cooling air introduced through the intake port of the enclosure to a heating portion of the mold transformer; and an upper housing which seals the space between the air flow inducing plate and the exhaust box.

Description

Mold transformer cooling device

The present invention relates to an eco-friendly mold transformer cooling device used indoors, and more particularly, to a mold transformer cooling device capable of simultaneously improving cooling efficiency and energy use efficiency.

Conventionally, in order to cool the heat generated by the mold transformer inside the enclosure, the lower part of the enclosure is punched to allow external cold air to flow into the interior of the enclosure, and an exhaust fan is installed at the rear or upper side of the enclosure to cool the It was common to discharge the generated heat to the outside.

In this case, most of the inlet air does not pass through the heating part inside the winding of the mold transformer, and it is discharged while circling around the mold transformer inside the enclosure, so that the transformer is not properly cooled and overheated, causing many difficulties.

In particular, in the summer season, due to poor cooling efficiency of the mold transformer, the enclosure door is opened and a blower is additionally operated, or a separately manufactured cooling fan is installed under the transformer to operate. In addition, the indoor temperature rises due to the inability to dissipate the heat generated by the indoor faucet room transformer to the outside of the building, thereby increasing the building cooling load.

Such an increase in indoor temperature makes it difficult to cool the transformer, and an increase in additional blower power consumption and cooling load causes the transformer to become more overheated and a vicious cycle of the result, leading to a failure or a fire accident.

An example of a conventional technique is to install an exhaust duct on the concrete foundation of a mold transformer, close the outer peripheral surface of the winding of the mold transformer and the enclosure, and install an exhaust duct on the ceiling, thereby discharging the heat that has cooled the transformer to the outside. However, as the number of power receiving equipment accessories built into the enclosure is increasing and the size of the enclosure is increasing, this technology is no longer applicable in terms of economy and efficiency.

In order to solve the problem of cooling the mold transformer of the indoor power receiving facility, an environmentally friendly technology that simultaneously improves cooling efficiency and energy use efficiency is implemented by improving the existing unreasonable cooling method of the mold transformer.

An object of the present invention has been proposed to solve the problems in view of the existing problems, and by installing a lower housing with a safety door between the enclosure and the mold transformer, the upper side of the lower housing is sealed, and a narrow air cylinder is provided on the winding side of the mold transformer. By installing an airflow guide plate forming a furnace to increase the resistance of the airflow moving from the lower housing to the upper housing, cooling air is intensively introduced into the windings inside the mold transformer and at the same time radiates from the outer winding surface of the mold transformer. The objective is to provide an efficient mold transformer cooling device that evenly cools the entire heating part of the mold transformer by inducing the generated heat to be discharged to the upper housing at an appropriate speed.

A mold transformer cooling apparatus according to an embodiment of the present invention for solving the above technical problem includes: an enclosure having an intake port at a lower portion and an exhaust box at an upper portion to surround the mold transformer; A lower housing surrounding the winding of the mold transformer and a charging portion of the high voltage terminal within the enclosure; An air flow guide plate for guiding the cooling air introduced through the intake port of the housing to the heating portion of the winding of the mold transformer; And an upper housing for sealing a space between the air flow guide plate and the exhaust box.

In another embodiment, the lower housing of the present invention is installed to float at a certain distance from the bottom of the case while surrounding the front and rear and left and right sides of the mold transformer with a certain distance between the case and the mold transformer.

In another embodiment, safety doors are installed at the front and rear sides of the lower housing according to the present invention to block access to the filling part of the mold transformer.

In another embodiment, the safety door of the present invention is characterized in that a transparent window is installed to facilitate inspection of the mold transformer.

As another embodiment, the safety door of the present invention is characterized in that the double door type.

In another embodiment, the air flow guide plate of the present invention is located on the upper side of the outer peripheral part of the winding of the mold transformer and is installed horizontally on the interface between the upper housing and the lower housing.

In another embodiment, the air flow guide plate of the present invention discharges a total of 3 air, one for each phase to increase air flow resistance by forming a narrow air passage between the lower housing and the outer peripheral surface of the winding of the mold transformer. It is characterized in that the hole is formed.

In another embodiment, at least one opening and closing door is installed at one side of the side or upper surface of the exhaust box of the present invention to manually open the exhaust fan and the exhaust system of the exhaust duct to take emergency measures.

The mold transformer cooling apparatus of the present invention installs a lower housing floating at a certain distance from the bottom of the housing while surrounding the winding of the mold transformer and the filling part of the high voltage terminal between the mold transformer and the enclosure to complement the installation space structure around the winding. In addition, by installing an air flow guide plate that creates a narrow air passage on the outer peripheral surface of the winding at the interface between the lower housing and the upper housing, the airflow resistance is increased to prevent natural convection in the inner space of the winding and the lower housing. It is possible to increase the forcible convection phenomenon by driving, and thereby effectively cools the temperature of the heating part of the winding of the mold transformer, thereby preventing a transformer burnout accident in advance.

In addition, when the exhaust fan is driven by feeding back the transformer winding temperature by adding a simple device, it is possible to control the temperature distribution of the heating part of the transformer in an optimal state, thereby prolonging the life of the transformer.

In addition, by discharging the heat generated by the transformer collected in the exhaust box to the outside of the building, the ambient temperature of the transformer is lowered, thereby reducing the power consumption of the cooling fan and greatly saving the building cooling energy.

In addition, the mold transformer cooling device of the present invention has a safety door installed in the lower housing surrounding the mold transformer, and a transparent window is installed in the safety door. It has the advantage of having the convenience and safety that it can prevent safety accidents in contact in advance, and can check the condition of the mold transformer through a transparent window without opening the safety door.

1 is a front view of an interior of a housing showing a cooling device for a mold transformer according to the present invention;

2 is a longitudinal sectional view taken along line A-A of FIG. 1;

3 is a cross-sectional view taken along line B-B of FIG. 1.

* Description of major symbols in the drawings *

10: mold transformer 12: winding

12a: low voltage winding 12b: high voltage winding

13: high voltage terminal 14: iron core

15: bolt 16: upper frame

17: lower frame 18: spacer

19: low pressure lead-out conductor 19a: low pressure support insulator

20: housing 22: intake port

24: exhaust box 24a: exhaust fan

24b: exhaust duct 24c: opening and closing door

26: enclosure door 30: lower housing

32: safety door 34: transparent window

40: air flow guide plate 42: air exhaust hole

50: upper housing

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. Accordingly, the shape of the element in the drawings may be exaggerated to emphasize a clearer description. It should be noted that in each drawing, the same configuration may be indicated by the same reference numeral. Detailed descriptions of known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention will be omitted.

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

1 to 3, the mold transformer cooling apparatus of the present invention includes: a housing 20 having an intake port 22 at a lower portion and an exhaust box 24 at the upper portion to surround the mold transformer 10; A lower housing 30 surrounding the winding 12 of the mold transformer 10 and the charging portion of the high voltage terminal 13 within the enclosure 20; An air flow guide plate 40 for guiding the cooling air introduced into the intake port 22 of the enclosure 20 to a heating part inside and outside the winding 12 of the mold transformer 10; And an upper housing 50 sealing the space between the air flow guide plate 40 and the exhaust box 24.

That is, in the center of the winding 12, a total of three iron cores 14 are located, one for each phase passing through the winding 12, and the iron core 14 and a magnetic circuit are formed. The upper and lower iron cores 14 are coupled to the upper and

lower frames

16 and 17 via bolts 15, and the upper and

lower frames

16 and 17 and each phase winding 12 The upper and lower surfaces of) are coupled via a spacer 18.

At this time, the spacer 18 fixes a cylindrical air passage at a predetermined interval between the iron core 14 and the low voltage winding 12a and between the low voltage winding 12a and the high voltage winding 12b.

Here, a low-voltage lead-out conductor 19 is connected to the upper one side of the low-voltage winding 12a to conduct electricity, and the upper end of the low-voltage winding 12a is attached to a low-voltage support insulator 19a installed on one side of the ceiling of the housing 20. It is connected, and the high voltage terminal 13 protrudes so as to energize one side of the outer circumferential surface of the high voltage winding 12b.

The enclosure 20 is provided with a double-door enclosure door 26 formed at the front and rear sides so that external cooling air is introduced into the interior through the lower portion of the enclosure 20, and the upper ceiling has a mold transformer. An exhaust box 24 is installed to collect the transformer heat generated in (10) and discharge it to the outside.

At this time, in the exhaust box 24, when the temperature of the winding 12 of the mold transformer 10 increases, the exhaust fan 24a on one side and an exhaust fan 24a on one side and an exhaust connected to the outside of the building or through an air conditioning duct are A duct 24b is installed, and in case of failure in the exhaust system such as the exhaust fan 24a and the exhaust duct 24b on one side or upper surface, at least 1 to manually open the exhaust box 24 to take emergency measures. Two or more opening and closing doors 24c are installed.

The lower housing 30 is installed so as to float at a certain distance from the bottom of the housing 20 while surrounding the front and rear and left and right sides of the mold transformer 10 between the housing 20 and the mold transformer 10, and Two-door safety doors 32 are installed at the rear and the mold transformer 10 to block access to the charging part of the mold transformer 10.

The air flow guide plate 40 is located on the upper side of the outer periphery of the winding 12 of the mold transformer 10 and is installed horizontally on the interface between the upper housing 50 and the lower housing 30, and at the same time, the lower housing 30 ) And the outer circumferential surface of the winding 12 of the mold transformer 10 to increase the air flow resistance, and the cooling air flowing into the inlet 22 can be used for each phase winding 12 of the mold transformer 10. ), three air outlet holes 42 are formed so as to evenly pass through the inner and outer surfaces of the).

The upper housing 50 is to seal the space between the air flow guide plate 40 and the upper exhaust box 24 of the enclosure 20, the mold transformer 10, the winding 12 and the iron core 14 The heat generated from is collected in the upper exhaust box 24.

In addition, the lower housing 30, the upper housing 50, the air flow guide plate 40, etc., it is preferable to appropriately use materials in consideration of electrical insulation, heat insulation, durability, and impact resistance, and in particular, mold transformer 10 ) In consideration of the ease of internal inspection, it is installed using a transparent material in the necessary part including the transparent window 34.

The operation and effect of the cooling device of the mold transformer of the present invention configured as described above will be described.

First, when external air flows into the interior of the enclosure 20 through the intake port 22 formed at the bottom of the double-door enclosure door 26, the exhaust installed on the ceiling of the enclosure 20 when the temperature of the winding 12 is low. The fan 24a is not driven.

However, when the temperature starts to rise from the inside of the winding 12 and the air inside the winding 12 is gradually heated, the air density decreases and moves the top of the winding 12 to the exhaust box 24 through the upper housing 50. It is discharged, and at the same time, cooling is performed by a natural convection phenomenon in which external air flows into the winding 12, which is a heating part of the mold transformer 10, through the inlet 22.

At this time, since the winding 12 has a structure in which a low-voltage winding 12a and a high-voltage winding 12b are installed on the inner side around the core 14, the core 14-the low-voltage winding 12a layer and the low-voltage winding (12a)-In the high-voltage winding (12b) layer, the heating part is densely formed and a narrow cooling passage is formed, whereas the high-voltage winding (12b) and the enclosure (20) form a large space with relatively little heat generation. Due to the slight convection phenomenon, air flow hardly occurs.

Therefore, the present invention encloses the winding 12 and the high voltage terminal 13 by modifying the existing safety door 32 installed between the winding 12 and the enclosure 20 to complement the installation space structure of the winding 12. While giving, a lower housing 30 floating at a certain distance from the bottom of the enclosure 20 is installed, and it is located at the interface between the lower housing 30 and the upper housing 50 to form a narrow air passage toward the winding 12. By installing the airflow guide plate 40, the airflow resistance is increased so that cooling air flows evenly on the inner layer of the winding 12 of the mold transformer 10 and the outer surface of the winding 12, which is a heating part. That is, by smoothing the balanced natural convection phenomenon of cooling air in the main heating parts such as the mold transformer 10, the low-voltage winding 12a layer and the high-pressure winding 12b surface, and the forced convection by driving the exhaust fan 24a, It greatly enhances the cooling effect.

And since the lower housing 30 of the present invention has a structure in which a safety door 32 is installed and a transparent window 34 is installed on the safety door 32, in addition to the role of increasing airflow resistance with the mold transformer 10, the mold It provides a role to check the state of the mold transformer 10 through the transparent window 34 while blocking access to the charging part of the transformer 10.

That is, when an operator opens the enclosure door 26 and enters the interior of the enclosure 20 and inspects surrounding facilities such as the mold transformer 10 in a confined space, the lower housing 30 and the safety door 32 are caused by the carelessness of the worker. It prevents safety accidents in contact with the charging area in advance, and provides convenience and safety to check the state of the mold transformer 10 through the transparent window 34 without opening the safety door 32.

In addition, by expanding the use of transparent materials in necessary portions of the upper and

lower housings

50 and 30, including the transparent window 34, convenience of internal inspection of the mold transformer 10 is achieved.

On the other hand, the present invention is not limited to the above-described embodiments, but can be carried out with modifications and variations within the scope of the gist of the present invention, and the technical idea to which such modifications and modifications are applied should also be regarded as belonging to the following claims. do.

Claims

A housing 20 having an intake port 22 at a lower portion and an exhaust box 24 at an upper portion to surround the mold transformer 10;

A lower housing 30 surrounding the winding 12 of the mold transformer 10 and the charging portion of the high voltage terminal 13 within the enclosure 20;

An air flow guide plate 40 for guiding the cooling air introduced through the intake port 22 of the enclosure 20 to the heating portion of the winding 12 of the mold transformer 10;

And an upper housing (50) sealing the space between the air flow guide plate (40) and the exhaust box (24).
The method according to claim 1,

The lower housing 30 is placed at a certain distance between the enclosure 20 and the mold transformer 10 and surrounds the front and rear and left and right sides of the mold transformer 10 while floating at a certain distance from the bottom of the enclosure 20. Mold transformer cooling device, characterized in that installed.
The method according to claim 2,

A mold transformer cooling device, characterized in that safety doors (32) are respectively installed at the front and rear sides of the lower housing (30) to block access to the filling part of the mold transformer (10).
The method of claim 3,

The safety door (32) is a mold transformer cooling device, characterized in that the transparent window (34) is installed to facilitate the inspection of the mold transformer (10).
The method of claim 4,

The safety door 32 is a mold transformer cooling device, characterized in that the double-door type.
The method according to claim 1,

The air flow guide plate 40 is a mold transformer, characterized in that it is located on the upper side of the outer peripheral portion of the winding 12 of the mold transformer 10 and is installed horizontally at the interface between the upper housing 50 and the lower housing 30 Cooling system.
The method of claim 6,

The air flow guide plate 40 forms a narrow air passage between the lower housing 30 and the outer circumferential surface of the winding 12 of the mold transformer 10 to increase air flow resistance, one for each phase. Mold transformer cooling device, characterized in that a total of three air outlet holes (42) are formed.
The method according to claim 1,

At least one opening and closing door 24c is installed on one side of the exhaust box 24 to take emergency measures by manually opening the exhaust fan 24a and the exhaust system of the exhaust duct 24b. Mold transformer cooling device, characterized in that.