KR20190118439A - Out-shell for transformer - Google Patents

Abstract

The present invention relates to an outer shell for a transformer and, more specifically, to an outer shell for a transformer accommodating the transformer inside. The outer shell comprises: an intake port penetrating at least one side of the lower part, wherein external air flows inside; an exhaust port penetrating at least one side of the upper part, wherein internal air heated by heat radiation of the transformer is discharged; and a soundproof member attached to a part or all of the inner surface of the outer shell. According to the present invention, noises transferred to the outside of the outer shell can be minimized so the outer shell has a noise reduction effect of the transformer. In addition, a heat radiation structure of the outer shell is improved so heat radiation efficiency of the transformer is improved.

Description

Out-shell for transformer

The present invention relates to an enclosure for a transformer having a noise reduction structure and a cooling structure.

In general, a mold transformer is a transformer of a solid insulation type that surrounds a winding with an epoxy resin, and has an advantage of preventing an environmental pollution by mixing an inorganic filler such as silica in an epoxy resin or a base material such as glass fiber. In addition, it has the advantage of minimizing the risk of fire caused by the flame retardant and self-extinguishing, it is widely used in the basement of the building, subway, underground malls. In particular, there is no gas generation during curing, and there is little reaction shrinkage, so it is mechanically stable, and it is excellent in chemical resistance and water resistance heat resistance, so there is little damage to the transformer even if left for a long time. In addition, since the winding is molded in a high vacuum, it has strong resistance to electromechanical force, external mechanical force, and abnormal vibration. Therefore, it is suitable to be used in parts requiring stable voltage supply, for example, public buildings, subways and hospitals.

1 is a front view of a conventional mold transformer.

As shown in FIG. 1, the mold transformer 1 presses the coil assembly 2 in which the low pressure coil and the high pressure coil are wound around the iron core 1a, and the iron core 1a exposed to the upper and lower portions of the coil assembly 2. The upper frame 3 and the lower frame 4 are pressed together. The iron core () is fixed by the upper frame (3) and the lower frame (4), and is supported by the base (5) which is installed on the rear surface of the lower frame (4). In addition, the mold transformer 1 has a primary terminal 7 provided in the coil assembly 2 and a secondary terminal 6 provided in the upper frame 3. The primary terminal 7 and the coil assembly 2 are connected by an interphase lead 9 and are provided with a tap switching part 8 for changing the tap voltage on the surface of the coil assembly 2.

Most of the noise generated in the mold transformer of the above-described structure is generated in the iron core (silicon steel sheet), which is caused by magnetostrictive vibration phenomenon (a phenomenon in which elastic deformation of the magnetic body occurs when the ferromagnetic material is magnetized). In addition, noise due to the operation of the cooling fan for cooling the mold transformer or noise due to resonance of other structures may be generated.

However, since the conventional mold transformer is installed outdoors or on-site, there is a problem that noise is transmitted to the surroundings as it is. In order to solve this problem, an enclosure may be installed to accommodate a mold transformer, but there is a problem that adversely affects cooling.

It is an object of the present invention to provide a transformer enclosure that can reduce the noise of a transformer.

It is also an object of the present invention to provide a transformer enclosure with improved cooling efficiency of the transformer.

The present invention relates to a transformer enclosure, in the transformer enclosure that accommodates the transformer therein, the enclosure is formed through the inlet port through which the outside air flows into at least one side of the lower portion, the heat radiation of the transformer on at least one side of the upper portion An exhaust port through which the heated internal air is exhausted is formed, and a soundproof member may be attached to a part or the entire inner surface of the enclosure.

The soundproof member may be attached to the inner surface of the enclosure other than the region where the inlet and the exhaust port are formed, or may be attached to the entire inner surface of the enclosure, and the hole penetrates in a shape corresponding to the shape of the inlet and the exhaust port.

The intake port is formed on the lower surface of the enclosure or the lower portion of each side facing each other.

The exhaust port is formed on the upper surface of the enclosure or on top of each side facing each other.

It may further include a duct installed inside the enclosure and covering the exhaust port, the duct having a plurality of duct panels spaced apart from each other.

The duct may have one surface in a direction in which air is introduced into the enclosure and the other surface in a direction in which the air is exhausted, and the duct panel may be bent at least once in a direction in which the air is exhausted in a direction in which the air is introduced.

The duct panel is characterized in that the perforated plate formed with a plurality of holes or a plate attached to the sound absorbing material of the porous surface.

According to the present invention, it is possible to minimize the noise transmitted to the outside of the enclosure there is a noise reduction effect of the transformer. In addition, there is an effect that the heat radiation efficiency of the transformer is improved by improving the heat radiation structure of the enclosure.

1 is a front view of a conventional mold transformer,
Figure 2 is a perspective view of the transformer enclosure according to an embodiment of the present invention.
3 is a perspective view showing an installation state of a transformer enclosure and a transformer according to another embodiment of the present invention.
Figure 4 is a perspective view of the enclosure for the mold transformer according to Figure 3,
5 to 8 are schematic views showing various embodiments of the mold transformer enclosure according to FIG. 3.
9 is a perspective view illustrating a state in which a duct is installed in an enclosure for a mold transformer according to an embodiment of the present invention.
10 is an enlarged perspective view of the duct according to FIG. 9;
11 is a perspective view showing a duct panel provided in the duct according to FIG.
12 is a perspective view showing another example of the duct panel according to FIG.
13 is a view showing an example of a sound absorbing material that can be applied to the duct panel of the present invention.

The above objects, features, and advantages will be described in detail with reference to the accompanying drawings, whereby those skilled in the art to which the present invention pertains may easily implement the technical idea of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Figure 2 is a perspective view of the transformer enclosure according to an embodiment of the present invention.

As shown in FIG. 2, the transformer enclosure 100 ′ according to an embodiment of the present invention includes a main body 100-1 and an upper cover 100-2 coupled to the main body 100-1 so as to be openable and closeable. ), And an installation unit 100-3 fixing the main body 100-1 to the installation surface.

Since the main body 100-1 and the upper cover 100-2 are coupled to be openable and closed, the enclosure 100 ′ is semi-sealed. A soundproof member (not shown) may be attached to the inside of the enclosure 100 '(the soundproof member will be described in detail in an embodiment to be described later).

The enclosure 100 ′ may be a semi-hermetic structure, or may be a hermetic structure that cannot be opened and closed as described below. In order to reduce noise, the hermetic structure is more advantageous, so that the hermetic enclosure will be described as a main embodiment of the present invention (but the soundproofing member to be described later may be equally applicable to a semi hermetic enclosure).

3 is a perspective view showing an installation state of a transformer enclosure and a transformer according to another embodiment of the present invention. 4 is a perspective view of the enclosure for the mold transformer according to FIG. 3.

2 and 3, the transformer enclosure 100 according to an embodiment of the present invention may accommodate a transformer therein. The transformer may be, for example, a mold transformer 30.

The mold transformer 30 may include a coil assembly 34 in which coils are wound around the iron core 32, and an upper frame 31a and a lower frame 31b supporting the iron core 32 up and down.

The noise generated from the iron core 32 may be transmitted to the enclosure 100 through the upper frame 31a and the lower frame 31b. Since the noise transmitted to the enclosure 100 is discharged to the outside of the enclosure 100, a structure for preventing this is necessary.

Ventilation openings composed of a plurality of through holes are provided on the upper side and the lower side of the enclosure 100. Some of the vents may serve as passages for the withdrawal and withdrawal of the cable.

The ventilation port may be divided into an intake port 110 and an exhaust port 130 for intake and exhaust. The soundproof member 150 is attached to the inside of the enclosure 100.

Enclosure 100 forms an accommodation space enough to accommodate the mold transformer, the mold transformer is accommodated in the accommodation space. The enclosure 100 may have a hexahedron shape, but may have a polyhedron shape more than a hexahedron depending on the installation structure of the component. Enclosure 100 may be provided with a door (not shown) that can be opened and closed for the storage of the mold transformer, the door maintains a closed state except when opened for reasons such as repair of the mold transformer. In addition, the sound insulation member 150 is attached to a part or all of the inner surface of the enclosure 100.

Soundproof member 150 is made of a material capable of absorbing or reflecting noise, and easy to attach to the enclosure 300 of a variety of materials capable of sound insulation or sound absorption, such as foam board, glass wool, soundproof gypsum board, perforated panel, etc. Can be selected and applied as a material. Attaching the soundproof member 150 to the enclosure 100 has an effect of reducing the noise generated from the mold transformer.

The soundproof member 150 may be attached to all other portions except the portion where the inlet port 110 and the exhaust port 130 are formed (although the soundproof member may be attached to the inside of the enclosure even if not mentioned in various embodiments of the enclosure to be described below). do). In particular, the sound insulation member 150 is a part of the enclosure 100 corresponding to the position (that is, the upper frame and the lower frame) corresponding to the upper and lower portions of the iron core 32 to block the noise generated in the iron core 32 It can be attached to. In addition, the soundproof member 150 may be attached to the lower surface of the enclosure 100, in particular, it is necessary to secure space for attachment when attached to the lower surface. To this end, the width of the lower frame 31b may be changed to have a space for attachment of the soundproofing member 150 between the lower frame 31b and the lower surface of the enclosure 100.

When the soundproof member 150 is provided in the enclosure 100, the noise generated from the mold transformer may be minimized to be discharged to the outside of the enclosure 100 to help prevent noise, but the heat radiation effect of the mold radiator is reduced. Therefore, it is desirable to improve the heat dissipation effect of the enclosure 100 by providing various cooling structures. In the present invention, by installing a self-cooling or fan using natural convection to cool the inside of the enclosure (100) by air cooling using forced convection.

5 to 8 are schematic views showing various embodiments of the mold transformer enclosure according to FIG. 3.

As shown in Figure 5, the enclosure 100a of the present invention may be provided with an inlet port 110a on the lower surface, the exhaust port 130a may be provided on one side.

The mold transformer 30 generates heat due to losses in the coil assembly 34 and the iron core 32 upon application of current. Since the air inside the enclosure 100a heated by the heat generation of the coil assembly 34 and the iron core 32 rises inside the enclosure 100a, the air density of the lower side of the enclosure 100a is lowered.

Therefore, the outside air of the enclosure (100a) is introduced into the enclosure (100a) through the inlet port (11a0), and the heated air is discharged to the outside of the enclosure (100a) through the exhaust port 130a above the enclosure (100a). That is, the outside air relatively cooler than the air inside the enclosure 100a is pushed in through the inlet 110a to cool the mold transformer 30, and the heated air is discharged through the exhaust port 130a to form the mold transformer 30. Is cooled (natural convection).

Alternatively, as shown in Figure 6, the enclosure 100b of the present invention may be provided with an inlet port (110b) on the lower surface, the exhaust port 130b may be provided on both upper sides.

5 and 6, although not shown in the drawings, a blower fan may be provided on the intake ports 110 and 110a to allow air inside the enclosures 100 and 100a to circulate from the lower side to the upper side. Forced convection method in which air is circulated by the blower fan has a higher heat dissipation efficiency than natural convection method.

Alternatively, as shown in FIG. 7, the enclosure 100c of the present invention is provided with inlets 110c at both sides of the lower side, and exhaust ports 130c are provided at both sides of the upper side, or as shown in FIG. 6, at both sides of the lower side. An intake port 110d may be provided and an exhaust port 130d may be provided on an upper surface thereof.

7 and 8, although not shown in the drawings, a blower fan may be provided on the intake ports 110c and 110d to allow air inside the enclosures 100c and 100d to circulate from the lower side to the upper side.

In the above-described embodiment, the soundproof member 150 may not be attached to a portion where the inlets 110-110d and the exhaust ports 130-130d are formed. Alternatively, the inlet 110-110d and the exhaust port 130-130d may be provided by processing and attaching a hole having a shape corresponding to the inlet 110-110d and the exhaust port 130-130d to the sound insulation member 150. The air through can be circulated.

On the other hand, it may be provided with an additional noise prevention structure to reduce the noise transmitted to the outside of the enclosure through the inlet and exhaust.

9 is a perspective view illustrating a state in which a duct is installed in a mold transformer enclosure according to an embodiment of the present invention, and FIG. 10 is an enlarged perspective view of the duct according to FIG. 9. FIG. 11 is a perspective view showing the internal structure of the duct according to FIG. 9, and FIG. 12 is a perspective view showing the detailed shape of the inside of the duct according to FIG. 11 (for convenience, the configuration not shown in FIGS. 9 to 12 is FIGS. 3 and FIG. Reference is made to the reference number 4).

As shown in FIG. 9, the enclosure 100 of the present invention may be provided with a duct 170 for reducing noise at the exhaust port 130.

Since the intake port 110 side is the outside air is introduced, the transmission of noise is also affected by the flow direction of the air. Therefore, the noise is more easily transmitted to the outside of the enclosure 100 through the exhaust port 130 than the intake port 110. The duct 170 is installed to cover the inner exhaust port 130 of the enclosure 100 in order to minimize the noise transmitted to the outside.

The duct 170 is formed to have a size corresponding to the size of the region where the exhaust port 130 is formed, and has a substantially rectangular parallelepiped shape. The duct 170 serves to form a kind of flow path so that the internal air and sound of the enclosure 100 pass through the duct 170 and then be discharged to the outside of the enclosure 100 through the exhaust port 130. Accordingly, the duct 170 may have a shape in which both sides of the duct 170 are open so that air is introduced into one inner side of the enclosure 100 and air is discharged toward the other surface facing the other side. The heated air inside the enclosure 100 flows from one side of the duct 170 to the other, and this direction is an exhaust direction toward the outside in the interior of the enclosure 100.

10 and 11, the duct 170 is provided with a plurality of duct panels 172, and a flow path is formed by the arrangement of the duct panels 172.

The duct panel 172 is a plate bent upward along the longitudinal direction, and the plurality of duct panels 172 are arranged to be spaced apart from each other at equal intervals to form a flow path through which air passes between the duct panels 172. . The duct panel 172 is bent once in an inverted 'V' shape. Alternatively, the duct panel 172 may have a shape in which a plate is bent a plurality of times by a 'V' letter or a 'U' letter. The duct panel 172 has a shape in which the plate is bent so that air and sound collide with each other to reduce noise.

The duct panel 172 is bent at least once after being inclined upward toward the inside of the duct 170 from the side where the air is introduced into the duct 170 and inclined downward toward the air exiting the duct 170. That is, the vertex of the inverse 'V' shape of the duct panel 172 is disposed to face the upper side of the duct 170. Therefore, while the air inside the enclosure 100 rides over the duct panel 172 and hits the bent portion or the inside of the duct 170, the sound absorption and noise reduction effect.

In addition, the duct panel 172 may be made of a material such as rubber to reduce noise, and may be made of various materials capable of absorbing sound in addition to rubber.

The duct panel 172 may be a shape of bending the plate as described above, and although not shown in the drawing, a plurality of plate is not bent form of the plate is spaced apart and staggered to form a zigzag flow path The duct panel may be provided. That is, the emission of noise can be reduced by bending the duct panel or forming a zigzag flow path in the duct.

In addition, the duct panel 172 may have a perforated plate shape in which a plurality of holes are formed by perforating the plate as shown in FIG. 10 to increase the noise reduction effect. Alternatively, the sound absorbing material may be attached to the plate member in the form of a perforated plate, or a foamed material which is easily absorbed without a separate perforated plate may be applied. Alternatively, the duct panel 172 may be implemented in the form of attaching the sound absorbing material to the non-perforated panel.

13 is a view showing an example of a sound absorbing material that can be applied to the duct panel of the present invention.

As illustrated in FIG. 13, the sound absorbing material applied to the duct panel of the present invention may be a material having a porous surface. A sound absorbing material can be used as a sound absorbing material, or a porous material can be applied as a sound absorbing material to improve sound absorbing performance.

In addition, the duct of the present invention preferably has heat resistance to the extent that it is not deformed by the temperature of the heated air because the air heated by the heat generated by the mold transformer is exhausted. This is because if the duct does not have adequate heat resistance, a part of the flow path through which the air is deformed and the air is exhausted may deform and the exhaust flow may worsen.

As described above, according to the present invention can minimize the noise transmitted to the outside of the enclosure there is a noise reduction effect of the molded transformer. In addition, the present invention has the effect of improving the heat radiation structure of the enclosure to improve the heat radiation efficiency of the mold transformer.

The present invention as described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by.

30: mold transformer 32: iron core
34: coil assembly 100: enclosure
110: intake port 130: exhaust port
150: soundproof member 170: duct
172: duct panel

Claims (7)

In a transformer enclosure for housing a transformer therein,
The enclosure,
An intake port through which outside air flows into at least one side of the lower portion is formed through
An exhaust port through which the internal air heated by heat radiation of the transformer is exhausted is formed at least on one side of the upper portion,
Part or whole of the inner surface of the enclosure enclosure for transformer with a soundproof member. The method of claim 1,
The soundproof member is attached to the inner surface of the enclosure other than the region in which the inlet and exhaust ports are formed, or attached to the entire inner surface of the enclosure, the through-hole is formed in a shape corresponding to the shape of the inlet and exhaust port. The method of claim 2,
The intake port is a transformer enclosure formed on the lower surface of the enclosure or the lower portion of each side facing each other. The method of claim 3,
The exhaust port is a transformer enclosure formed on the upper surface of the enclosure or on top of each side facing each other. The method of claim 4, wherein
A transformer enclosure, which is installed inside the enclosure and covers the exhaust port, and further includes a duct having a plurality of duct panels spaced apart from each other. The method of claim 5,
The duct has an opening on one side of the air inflow direction and the other surface in the exhaust direction, and the duct panel has a shape bent at least once toward the exhaust direction in the air inflow direction. The method of claim 6,
The duct panel is a transformer housing that is a perforated plate formed with a plurality of holes or a plate material with a sound absorbing material of the porous surface.

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