Transformer

Abstract

The utility model provides a transformer which is provided with a voltage transformation part for transforming input electric power; the shell part comprises a bottom plate and side plates erected from the bottom plate, and a hollow cavity for accommodating the transformation part is defined by the bottom plate and the side plates; and a cooling unit that cools the transformer unit. Wherein the cooling part comprises a bottom surface cooling structure which is arranged on the bottom plate and cools the transformation part from the bottom plate side through circulation of a cooling medium between the bottom surface cooling structure and the outside of the transformer; and a side surface cooling structure which is provided on the side plate and cools the transformer part from the side plate side by circulation of a cooling medium between the side surface cooling structure and the outside of the transformer. According to the structure, the heat generated by the transformation part is led out from multiple directions, namely from the bottom plate side and the side plate side to the outside, so that the heat dissipation efficiency can be improved, and the heat dissipation effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to a transformer. Background Art

[0002] Transformers are indispensable electrical equipment in power systems and generate heat during operation. In order to prevent the transformer temperature from rising and to increase the transformer's load capacity and service life, the transformer needs to be cooled. Currently, the main cooling methods for transformers are:

[0003] 1) Natural cooling, that is, air naturally contacts the transformer and takes away the heat;

[0004] 2) Forced air cooling, that is, a ventilation cooling structure is set on the transformer body, and an external fan is used to blow air through the ventilation cooling structure to dissipate heat from the transformer;

[0005] 3) Liquid cooling, that is, a liquid cooling substrate is attached to the bottom surface of the transformer, and the liquid cooling substrate is used to transfer the heat emitted from the bottom surface of the transformer to the outside to achieve cooling.

[0006] Among them, the first two methods have problems such as large transformer size and poor cooling effect. Therefore, when efficient heat dissipation is required, the third liquid cooling method is often used.

[0007] However, although liquid cooling can cope with low-frequency, low-current and other usage scenarios with low heat generation, in the case of transformers such as high-frequency isolation transformers that require high frequency and high current and generate high heat, the cooling effect is not ideal and there is still room for improvement. Utility Model Content

[0008] The utility model aims to provide a transformer which can effectively improve the heat dissipation effect.

[0009] In order to achieve the above-mentioned invention object, a technical solution of the utility model provides a transformer, which comprises: a transformer part, which transforms input power; a shell part, which includes a bottom plate and a side plate rising from the bottom plate, and the bottom plate and the side plate are used to form a hollow cavity for accommodating the transformer part; and a cooling part, which cools the transformer part; the transformer is characterized in that the cooling part comprises: a bottom cooling structure, which is arranged on the bottom plate, and the transformer part is cooled from the bottom plate side by the circulation of a cooling medium between the outside of the transformer; and a side cooling structure, which is arranged on the side plate, and the transformer part is cooled from the side plate side by the circulation of a cooling medium between the outside of the transformer.

[0010] In this way, by conducting the heat generated by the transformer unit to the outside from multiple directions, namely, from the bottom plate side and the side plate side, the heat dissipation efficiency can be improved and the heat dissipation effect can be effectively improved.

[0011] In addition, in the present technical solution, preferably, the flow path of the bottom cooling structure and the flow path of the side cooling structure are connected to each other.

[0012] In this way, there is no need to separately set up cooling medium circulation / cooling equipment (such as a pump for circulating the cooling medium and a heat exchanger for absorbing heat from the cooling medium) for the bottom cooling structure and the side cooling structure. It is only necessary to connect a set of cooling medium circulation / cooling equipment to the transformer to realize the circulation of the cooling medium in the bottom cooling structure, the side cooling structure and the outside. Therefore, it is conducive to the miniaturization and low cost of the overall system using the transformer.

[0013] In addition, in the present technical solution, preferably, the flow path of the bottom surface cooling structure includes an outflow port for allowing the cooling medium to flow out to the outside, and an inflow port for allowing the cooling medium cooled at the outside to flow in.

[0014] In this way, by allowing the cooling medium to flow in and out relative to the outside on the bottom plate side, the cooling medium can be better filled in the bottom cooling structure and the side cooling structure compared to the structure that allows the cooling medium to flow in and out relative to the outside on the side plate side, which helps to achieve better heat dissipation effect.

[0015] In addition, in the present technical solution, preferably, the flow path of the bottom cooling structure and / or the flow path of the side cooling structure extend in a meandering manner.

[0016] In this way, the layout area of ​​the flow paths of the bottom cooling structure and the side cooling structure can be increased, thereby improving the heat dissipation efficiency and effectively improving the heat dissipation effect.

[0017] In addition, in the present technical solution, preferably, the side cooling structure is provided on a side plate of the side plate that is opposite to the winding of the transformer unit.

[0018] In this way, by placing the side cooling structure opposite to the winding that generates more heat in the transformer part, the winding can be directly cooled, which can improve the heat dissipation efficiency and effectively improve the heat dissipation effect.

[0019] In addition, in the present technical solution, optionally, the bottom cooling structure is arranged in the bottom plate, and the side cooling structure is arranged in the side plate.

[0020] In this way, the bottom cooling structure and the side cooling structure are set up by utilizing the internal space of the bottom plate and the side plate of the transformer shell, without the need to separately set up components to form the bottom cooling structure and the side cooling structure, thus contributing to the miniaturization of the entire transformer.

[0021] In addition, in the present technical solution, preferably, the shell portion includes an intermediate plate rising from the bottom plate in the hollow cavity, the intermediate plate is inserted into the gap between adjacent windings of the transformer portion, and the cooling portion includes an intermediate cooling structure arranged in the intermediate plate and cooling the transformer portion from the intermediate plate side by circulating a cooling medium between the outside of the transformer.

[0022] In this way, by utilizing the intermediate cooling structure to directly absorb heat from the inside of the transformer unit, the heat dissipation efficiency can be further improved, and the heat dissipation effect can be effectively improved.

[0023] In addition, in the present technical solution, preferably, the flow path of the bottom surface cooling structure and the flow path of the intermediate cooling structure are communicated with each other.

[0024] In this way, the transformer only needs to be connected to a set of cooling medium circulation / cooling equipment to realize the circulation flow of the cooling medium in the bottom cooling structure, the intermediate cooling structure and the outside. Therefore, it is conducive to the miniaturization and cost reduction of the overall system using the transformer.

[0025] In addition, in the present technical solution, preferably, the flow path of the intermediate cooling structure extends in a meandering manner.

[0026] In this way, the layout area of ​​the flow path of the intermediate cooling structure can be increased, thereby improving the heat dissipation efficiency of the transformer and effectively improving the heat dissipation effect of the transformer.

[0027] In addition, in the present technical solution, optionally, the bottom surface cooling structure is arranged in the bottom plate, and the side surface cooling structure is composed of a side surface cooling flow path forming plate installed on the side plate and forming a flow path for the cooling medium to flow.

[0028] Thus, by arranging the bottom cooling structure in the bottom plate of the transformer housing, the transformer can be miniaturized to a certain extent. In addition, by forming the side cooling structure as an independent component, it is more convenient to perform maintenance operations such as replacement and repair in the later stage.

[0029] In addition, in the present technical solution, preferably, the transformer is a high-frequency isolation transformer.

[0030] In this way, for a high-frequency isolation transformer that generates a lot of heat due to the need for high frequency and large current, its heat dissipation efficiency can be improved, and its heat dissipation effect can be effectively improved.

[0031] In order to achieve the above-mentioned invention object, another technical scheme of the utility model provides a transformer, which comprises: a transformer part, which transforms input power; a shell part, which includes a bottom plate and a side plate rising from the bottom plate, and the bottom plate and the side plate are used to form a hollow cavity for accommodating the transformer part; and a cooling part, which cools the transformer part; the transformer is characterized in that the cooling part comprises: a bottom cooling structure, which is arranged on the bottom plate, and the transformer part is cooled from the bottom plate side by the circulation of a cooling medium between the outside of the transformer; and a side cooling structure, which has a heat absorption section arranged on the side plate and a heat dissipation section arranged in contact with the bottom cooling structure, and the transformer part is cooled from the side plate side by the circulation of a cooling medium between the heat absorption section and the heat dissipation section.

[0032] In this way, by conducting the heat generated by the transformer unit to the outside from multiple directions, namely, from the bottom plate side and the side plate side, the heat dissipation efficiency can be improved and the heat dissipation effect can be effectively improved.

[0033] In addition, in the present technical solution, preferably, the side cooling structure is arranged in a side plate of the side plate opposite to the winding of the transformer unit.

[0034] In this way, by placing the side cooling structure opposite to the winding that generates more heat in the transformer part, the winding can be directly cooled, which can improve the heat dissipation efficiency and effectively improve the heat dissipation effect.

[0035] In addition, in the present technical solution, preferably, the side cooling structure is composed of a heat pipe, the evaporation section of the heat pipe constitutes the heat absorption section of the side cooling structure, and the condensation section of the heat pipe constitutes the heat dissipation section of the side cooling structure.

[0036] In this way, the heat pipe can be used to efficiently dissipate heat from the transformer at the side plate.

[0037] In addition, in the present technical solution, preferably, the shell part includes an intermediate plate rising from the bottom plate in the hollow cavity, the intermediate plate is inserted into the gap between adjacent windings of the transformer part, and the cooling part includes an intermediate cooling structure, which has a heat absorption section arranged in the intermediate plate and a heat dissipation section arranged in contact with the bottom surface cooling structure, and the transformer part is cooled from the intermediate plate side by the circulation of a cooling medium between the heat absorption section and the heat dissipation section.

[0038] In this way, by utilizing the intermediate cooling structure to directly absorb heat from the inside of the transformer unit, the heat dissipation efficiency can be further improved, and the heat dissipation effect can be effectively improved.

[0039] In addition, in the present technical solution, preferably, the intermediate cooling structure is composed of a heat pipe, the evaporation section of the heat pipe constitutes the heat absorption section of the intermediate cooling structure, and the condensation section of the heat pipe constitutes the heat dissipation section of the intermediate cooling structure.

[0040] In this way, the heat pipe can be used to efficiently dissipate heat from the transformer at the middle plate.

[0041] In addition, in the present technical solution, preferably, the transformer is a high-frequency isolation transformer.

[0042] In this way, for a high-frequency isolation transformer that generates a lot of heat due to the need for high frequency and large current, its heat dissipation efficiency can be improved, and its heat dissipation effect can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a perspective view of the transformer in the first embodiment of the present invention.

[0044] Figure 2 It is an exploded view of the transformer in the first embodiment of the present invention.

[0045] Figure 3 It is a perspective view of the casing portion of the transformer in the first embodiment of the present invention.

[0046] Figure 4 It is a schematic diagram of the bottom plate of the casing of the transformer in the first embodiment of the present invention.

[0047] Figure 5 It is a schematic diagram of the left side plate of the casing of the transformer in the first embodiment of the present invention.

[0048] Figure 6 It is a schematic diagram of the right side plate of the casing of the transformer in the first embodiment of the present invention.

[0049] Figure 7 It is a schematic diagram of an intermediate plate of a casing portion of a transformer in the first embodiment of the present invention.

[0050] Figure 8 It is a perspective view of a transformer in a second embodiment of the present invention.

[0051] Fig. 9 It is an exploded view of the transformer in the second embodiment of the present invention.

[0052] Fig.10 It is a schematic diagram of a bottom plate of a casing portion of a transformer in a second embodiment of the present invention.

[0053] Fig.11It is a schematic diagram of a left side cooling plate assembly of a transformer in a second embodiment of the present utility model.

[0054] Fig.12 It is a schematic diagram of the right side cooling plate assembly of the transformer in the second embodiment of the present utility model.

[0055] Fig.13 It is a perspective view of a transformer in a third embodiment of the present invention.

[0056] Fig.14 It is an exploded view of a transformer in the third embodiment of the present invention.

[0057] Fig.15 It is a schematic diagram of a heat pipe used in a transformer in a third embodiment of the present invention.

[0058] Fig.16 It is a perspective view of the assembly method of the heat pipe in the third embodiment of the present invention. DETAILED DESCRIPTION

[0059] The following embodiments of the present invention are described. Note that the following embodiments are listed to facilitate understanding of the present invention and are not intended to limit the present invention.

[0060] In the following description, the same components are denoted by the same reference numerals, and the description of the components will be simplified or omitted as appropriate.

[0061] In addition, in the following description, directional expressions such as "up", "down", "left", "right", "front", "back", "top", and "bottom" are sometimes used, but these directional expressions are only used for the convenience of description and do not limit the installation method of the transformer.

[0062] In addition, in the following description, ordinal expressions such as "first", "second", and "third" are sometimes used, but these ordinal expressions are only for distinguishing between different things and do not represent a fixed order of appearance of things or their superiority or inferiority.

[0063] <1> First embodiment

[0064] [1-1] Transformer structure

[0065] based on Figure 1 to Figure 7 The structure of the transformer according to the first embodiment will be described.

[0066] The transformer in this embodiment is a device for transforming input power, and can be used as various types of transformers, such as an isolation transformer such as a high-frequency isolation transformer.

[0067] Figure 1 It is a perspective view showing the transformer in the first embodiment of the present invention. Figure 2 1 is an exploded view showing a transformer in the first embodiment of the present invention. Figure 2 In order to illustrate the structure of the transformer unit 1, only a portion of the potting material 3 described later is shown.

[0068] like Figure 1 , Figure 2 As shown, the transformer in this embodiment mainly comprises a transformer part 1, a housing part 2, a potting member 3 and Figure 1 , Figure 2 The cooling section is not shown.

[0069] The transformation unit 1 is a component that transforms input power in the transformer.

[0070] like Figure 2 As shown, the transformer 1 mainly comprises an iron core 11 , a plurality of windings 12 wound on the iron core 11 (as an example, it can be a pair, and of course more can be provided), and a plurality of input terminals 13 and a plurality of output terminals 14 electrically connected to the plurality of windings 12 .

[0071] External power is input to the primary winding of the winding 12 of the transformer 1 via the plurality of input terminals 13 , stepped up / down, and output to the outside from the secondary winding of the winding 12 via the plurality of output terminals 14 , thereby completing the transformation of the input power by the transformer 1 .

[0072] The casing 2 is a box-shaped component that accommodates the transformer 1 .

[0073] like Figure 2 As shown, the housing portion 2 mainly includes a bottom plate 21 , a left side plate 22 (side plate), a right side plate 23 (side plate), a front side plate 24 , a rear side plate 25 , and a middle plate 26 .

[0074] The bottom plate 21 is a plate-shaped member for supporting other parts of the transformer. As its material, for example, metal materials such as aluminum, aluminum alloy, and stainless steel can be used.

[0075] The left side plate 22, the right side plate 23, the front side plate 24, and the rear side plate 25 are all plate-shaped members. As materials thereof, metal materials such as aluminum, aluminum alloy, and stainless steel can be used, for example.

[0076] The left side plate 22, the right side plate 23, the front side plate 24 and the rear side plate 25 stand up from the bottom plate 21 and are fixed to the bottom plate 21, and together with the bottom plate 21, they enclose a hollow cavity with an opening at the top. Among them, the left side plate 22 and the right side plate 23 are arranged in a manner opposite to each other, and the front side plate 24 and the rear side plate 25 are arranged in a manner opposite to each other. As a fixing method of the left side plate 22, the right side plate 23, the front side plate 24, the rear side plate 25 and the bottom plate 21, for example, the left side plate 22 and the right side plate 23 can be fixed to the bottom plate 21 by welding, and the front side plate 24 and the rear side plate 25 can be fixed to the left side plate 22 and the right side plate 23 by bolts. Alternatively, the left side plate 22, the right side plate 23, the front side plate 24 and the rear side plate 25 can also be welded to the bottom plate 21. Of course, other methods can also be used.

[0077] The middle plate 26 is a plate-shaped member that stands up from the bottom plate 21 in the hollow cavity of the housing 2 and is fixed thereto, and is opposite to the left side plate 22 and the right side plate 23. In addition, in consideration of insulation from the input terminal 13 and the output terminal 14 of the transformer 1, the middle plate 26 is lower in height than the left side plate 22, the right side plate 23, the front side plate 24, and the rear side plate 25. As a material for the middle plate 26, for example, a metal material such as aluminum, aluminum alloy, or stainless steel can be used.

[0078] The transformer unit 1 is installed in the hollow cavity of the housing 2 in such a manner that the input terminal 13 and the output terminal 14 of the transformer unit 1 are located on the top opening side of the hollow cavity and the intermediate plate 26 is inserted into the gap between the adjacent windings 12 of the transformer unit 1. In this state, the left side plate 22, the right side plate 23 and the intermediate plate 26 of the housing 2 are opposite to the windings 12 of the transformer unit 1, respectively.

[0079] The potting member 3 is a component used to fix the transformer unit 1 in the housing unit 2, and can be made of, for example, potting glue. As a material of the potting glue, epoxy resin or the like can be used.

[0080] After the transformer part 1 is installed in the hollow cavity of the shell part 2 , potting glue is poured into the hollow cavity until it covers the winding part 12 of the transformer part 1 , and the potting part 3 is formed after the potting glue solidifies.

[0081] The transformer part 1 is firmly fixed in the housing part 2 through the portion of the potting member 3 located between the transformer part 1 and the inner surface of the hollow cavity of the housing part 2 .

[0082] The cooling unit is a structure for cooling the transformer unit 1 .

[0083] Figure 3 It is a perspective view of the case portion 2 of the transformer in the first embodiment.

[0084] like Figure 3As shown, in the present embodiment, the cooling unit is constituted by a cooling medium circulation flow path (see reference numerals 212 , 222 , 232 , and 262 ) formed in the casing 2 .

[0085] Specifically, the cooling part mainly includes a bottom surface cooling structure formed in the bottom plate 21 of the shell part 2, a left side cooling structure (side cooling structure) formed in the left side plate 22 of the shell part 2, a right side cooling structure (side cooling structure) formed in the right side plate 23 of the shell part 2, and an intermediate cooling structure formed in the intermediate plate 26 of the shell part 2.

[0086] Figure 4 1 is a schematic diagram of the bottom plate 21 of the case 2 of the transformer in the first embodiment.

[0087] like Figure 4 As shown, the bottom plate 21 includes a plate-shaped bottom plate body 211, a bottom plate circulation flow path 212 formed in the bottom plate body 211, a cooling medium inlet 213 (inlet) for the cooling medium cooled externally to flow into the bottom plate circulation flow path 212, and a cooling medium outlet 214 (outlet) for the cooling medium in the bottom plate circulation flow path 212 to flow out to the outside.

[0088] The bottom plate circulation flow path 212 of the bottom plate 21 constitutes a bottom surface cooling structure of the cooling unit.

[0089] The bottom plate circulation flow path 212 is formed in the bottom plate body 211 so as to extend in a meandering manner between the cooling medium inlet 213 and the cooling medium outlet 214 .

[0090] As an illustrative method, the bottom plate circulation flow path 212 extends from the cooling medium flow outlet 214 on the front side plate 24 side to the front of the rear side plate 25 roughly along the left side plate 22 at a position adjacent to the left side plate 22; then, the bottom plate circulation flow path 212 turns to the right side plate 23 side through the bending portion and reaches the front of the right side plate 23; then, the bottom plate circulation flow path 212 turns to the left side plate 22 side through the bending portion and extends to the front of the left side plate 22, and after reaching the front of the left side plate 22, it turns to the right side plate 23 side through the bending portion again and extends to the right side plate 23 to reach the front of the right side plate 23; after several bends and extensions, it reaches the cooling medium flow inlet 213 on the front side plate 24 side.

[0091] In addition, the bottom plate circulation flow path 212 may also be formed in other meandering shapes.

[0092] Thus, when the transformer is working, the cooling medium (e.g., distilled water, cooling oil, etc.) enters the bottom plate circulation flow path 212 from the outside through the cooling medium inlet 213, absorbs the heat conducted from the transformer 1 through the bottom plate body 211 while flowing along the bottom plate circulation flow path 212, and then flows out to the outside through the cooling medium outlet 214 to dissipate heat. Thus, the bottom surface cooling structure cools the transformer 1 from the bottom plate 21 side through the circulation of the cooling medium between the outside of the transformer.

[0093] In addition, the bottom plate circulation flow path 212 has a left plate inlet branch flow path 212La communicating with the cooling medium inlet 223 and a left plate outlet branch flow path 212Lb communicating with the cooling medium outlet 224 for the left plate circulation flow path 222 described later.

[0094] In addition, the bottom plate circulation flow path 212 includes a right plate inlet branch flow path 212Ra communicating with the cooling medium inlet 233 and a right plate outlet branch flow path 212Rb communicating with the cooling medium outlet 234 for a right plate circulation flow path 232 described later of the right plate 23 .

[0095] The bottom plate circulation flow path 212 has an intermediate plate inlet branch flow path 212Ma communicating with the cooling medium inlet 263 and an intermediate plate outlet branch flow path 212Mb communicating with the cooling medium outlet 264 for the intermediate plate circulation flow path 262 described later.

[0096] Figure 5 1 is a schematic diagram of the left side plate 22 of the case portion 2 of the transformer in the first embodiment.

[0097] like Figure 5 As shown, the left side plate 22 includes a plate-shaped left side plate body 221, a left side plate circulating flow path 222 formed in the left side plate body 221, a cooling medium inlet 223 for the cooling medium in the bottom plate circulating flow path 212 to flow into the left side plate circulating flow path 222, and a cooling medium outlet 224 for the cooling medium in the left side plate circulating flow path 222 to flow out of the bottom plate circulating flow path 212.

[0098] The left-side plate circulation flow path 222 of the left-side plate 22 constitutes a side cooling structure of the cooling unit.

[0099] The left plate circulation flow path 222 is formed in the left plate body 221 so as to extend in a meandering manner between the cooling medium inlet 223 and the cooling medium outlet 224 .

[0100] As an illustrative method, the left side plate circulation flow path 222 is connected with the left side plate inlet branch flow path 212La of the bottom plate circulation flow path 212 of the bottom plate 21 via the cooling medium inlet 223 at a position adjacent to the rear side plate 25, and extends from the cooling medium inlet 223 along the rear side plate 25 to the top near the top of the left side plate 22; then, the left side plate circulation flow path 222 turns to extend toward the bottom plate 21 side via the bending portion and reaches the front of the bottom plate 21; then, the left side plate circulation flow path 222 turns to extend toward the top via the bending portion to near the top of the left side plate 22, and after reaching this position, turns to extend toward the bottom plate 21 side via the bending portion again, reaches the cooling medium outlet 224 on the front side plate 24 side, and is connected with the left side plate outlet branch flow path 212Lb of the bottom plate circulation flow path 212 of the bottom plate 21.

[0101] In addition, the left plate circulation flow path 222 may also be formed in other serpentine shapes.

[0102] Thus, when the transformer is working, part of the cooling medium flowing into the bottom plate circulation flow path 212 of the bottom plate 21 from the outside enters the left plate circulation flow path 222 through the cooling medium inlet 223, absorbs the heat conducted from the transformer 1 through the left plate body 221 while flowing along the left plate circulation flow path 222, and then flows back to the bottom plate circulation flow path 212 of the bottom plate 21 through the cooling medium outlet 224, and flows from the bottom plate circulation flow path 212 to the outside to dissipate heat. Thus, the side cooling structure cools the transformer 1 from the left plate 22 side by circulating the cooling medium between the outside of the transformer.

[0103] Figure 6 1 is a schematic diagram of the right side plate 23 of the case portion 2 of the transformer in the first embodiment.

[0104] like Figure 6 As shown, the right side plate 23 includes a plate-shaped right side plate body 231, a right side plate circulating flow path 232 formed in the right side plate body 231, a cooling medium inlet 233 for the cooling medium in the bottom plate circulating flow path 212 to flow into the right side plate circulating flow path 232, and a cooling medium outlet 234 for the cooling medium in the right side plate circulating flow path 232 to flow out of the bottom plate circulating flow path 212.

[0105] The right side plate circulation flow path 232 of the right side plate 23 constitutes a side cooling structure of the cooling unit.

[0106] The right plate circulation flow path 232 is formed in the right plate body 231 so as to extend in a meandering manner between the cooling medium inlet 233 and the cooling medium outlet 234 .

[0107] As an illustrative method, the right side plate circulation flow path 232 is connected with the right side plate inlet branch flow path 212Ra of the bottom plate circulation flow path 212 of the bottom plate 21 via the cooling medium inlet 233 at a position adjacent to the front side plate 24, and extends from the cooling medium inlet 233 along the front side plate 24 to the top near the top of the right side plate 23; then, the right side plate circulation flow path 232 turns to extend toward the side of the bottom plate 21 via the bending portion and reaches the front of the bottom plate 21; then, the right side plate circulation flow path 232 turns to extend toward the top via the bending portion to near the top of the right side plate 23, and after reaching this position, turns to extend toward the side of the bottom plate 21 via the bending portion again, reaches the cooling medium outlet 234 on the bottom plate 21 side, and is connected with the right side plate outlet branch flow path 212Rb of the bottom plate circulation flow path 212 of the bottom plate 21.

[0108] In addition, the right side plate circulation flow path 232 may also be formed in other meandering shapes.

[0109] Thus, when the transformer is working, part of the cooling medium flowing into the bottom plate circulation flow path 212 of the bottom plate 21 from the outside enters the right plate circulation flow path 232 through the cooling medium inlet 233, absorbs the heat conducted from the transformer 1 through the right plate body 231 while flowing along the right plate circulation flow path 232, and then flows back to the bottom plate circulation flow path 212 of the bottom plate 21 through the cooling medium outlet 234, and flows from the bottom plate circulation flow path 212 to the outside to dissipate heat. Thus, the side cooling structure cools the transformer 1 from the right plate 23 side by circulating the cooling medium between the outside of the transformer.

[0110] Figure 7 1 is a schematic diagram of the intermediate plate 26 of the case portion 2 of the transformer in the first embodiment.

[0111] like Figure 7 As shown, the intermediate plate 26 includes a plate-shaped intermediate plate body 261, an intermediate plate circulation flow path 262 formed in the intermediate plate body 261, a cooling medium inlet 263 for the cooling medium in the bottom plate circulation flow path 212 to flow into the intermediate plate circulation flow path 262, and a cooling medium outlet 264 for the cooling medium in the intermediate plate circulation flow path 262 to flow out to the bottom plate circulation flow path 212.

[0112] The intermediate plate circulation flow path 262 of the intermediate plate 26 constitutes an intermediate cooling structure of the cooling unit.

[0113] The intermediate plate circulation flow path 262 is formed in the intermediate plate body 261 so as to extend in a meandering manner between the cooling medium inlet 263 and the cooling medium outlet 264 .

[0114] As an illustrative method, the middle plate circulation flow path 262 is connected with the middle plate inlet branch flow path 212Ma of the bottom plate circulation flow path 212 of the bottom plate 21 via the cooling medium inlet 263 at a position adjacent to the front side plate 24, and extends from the cooling medium inlet 263 along the front side plate 24 to the top near the top of the middle plate 26; then, the middle plate circulation flow path 262 turns to extend toward the side of the bottom plate 21 via the bending portion and reaches the front of the bottom plate 21; then, the middle plate circulation flow path 262 turns to extend toward the top via the bending portion to near the top of the middle plate 26, and after reaching this position, turns to extend toward the side of the bottom plate 21 via the bending portion again, reaches the cooling medium outlet 264 on the side of the bottom plate 21, and is connected with the middle plate outlet branch flow path 212Mb of the bottom plate circulation flow path 212 of the bottom plate 21.

[0115] In addition, the intermediate plate circulation flow path 262 may be formed in other meandering shapes.

[0116] Thus, when the transformer is working, part of the cooling medium flowing into the bottom plate circulation flow path 212 of the bottom plate 21 from the outside enters the intermediate plate circulation flow path 262 through the cooling medium inlet 263, absorbs the heat conducted from the transformer 1 through the intermediate plate body 261 while flowing along the intermediate plate circulation flow path 262, and then flows back to the bottom plate circulation flow path 212 of the bottom plate 21 through the cooling medium outlet 264, and flows to the outside from the bottom plate circulation flow path 212 to dissipate heat. Thus, the intermediate cooling structure cools the transformer 1 from the intermediate plate 26 side by circulating the cooling medium between the outside of the transformer.

[0117] [1-2] Transformer Operation

[0118] Next, the operation of the transformer according to the first embodiment will be described.

[0119] As a preliminary preparation, the input terminal 13 of the transformer unit 1 of the transformer is connected to the power input source, and the output terminal 14 of the transformer unit 1 is connected to the power output target. In addition, the cooling medium inlet 213 on the bottom plate 21 of the transformer is connected to the cooling medium discharge end of the cooling medium circulation / cooling equipment (the cooling medium circulation / cooling equipment at least includes a pump that circulates the cooling medium and a heat exchanger that absorbs heat from the cooling medium), and the cooling medium outlet 214 on the bottom plate 21 is connected to the cooling medium suction end of the cooling medium circulation / cooling equipment.

[0120] When the transformer is operating, the transformer unit 1 converts the power input from the input terminal 13 into a desired voltage by electromagnetic induction, and outputs the desired voltage from the output terminal 14 .

[0121] At the same time, the cooling medium circulation / cooling equipment is started, and under the pumping action of its pump, the cooling medium flows from the cooling medium inlet 213 on the bottom plate 21 of the transformer into the bottom plate circulation flow path 212, and a part of it flows along the bottom plate circulation flow path 212 to absorb heat.

[0122] In addition, another part of the cooling medium that flows into the bottom plate circulation flow path 212 flows into the right plate circulation flow path 232 from the cooling medium flow inlet 233 of the right side plate 23, flows along the right side plate circulation flow path 232 and absorbs heat, and then returns to the bottom plate circulation flow path 212 from the cooling medium flow outlet 234.

[0123] Furthermore, another part of the cooling medium that has flowed into the bottom plate circulation flow path 212 flows into the intermediate plate circulation flow path 262 from the cooling medium flow inlet 263 of the intermediate plate 26 , flows along the intermediate plate circulation flow path 262 and absorbs heat, and then returns to the bottom plate circulation flow path 212 from the cooling medium flow outlet 264 .

[0124] In addition, another part of the cooling medium that flows into the bottom plate circulation flow path 212 flows into the left plate circulation flow path 222 from the cooling medium flow inlet 223 of the left plate 22, flows along the left plate circulation flow path 222 and absorbs heat, and then returns to the bottom plate circulation flow path 212 from the cooling medium flow outlet 224.

[0125] Then, these cooling media uniformly flow back to the cooling medium circulation / cooling equipment from the cooling medium flow outlet 214 on the bottom plate 21 of the transformer, have their heat absorbed by the heat exchanger of the cooling medium circulation / cooling equipment, and flow again into the bottom plate circulation flow path 212 of the bottom plate 21 of the transformer.

[0126] In this way, the transformer unit 1 is cooled simultaneously from the bottom plate 21 side, the left side plate 22 side, the right side plate 23 side, and the middle plate 26 side of the case portion 2 of the transformer.

[0127] [1-3] Technical Effects

[0128] According to the transformer of this embodiment, since the transformer part 1 is cooled not only from the bottom plate 21 side of the transformer housing part 2, but also from the left plate 22 side, the right plate 23 side and the middle plate 26 side of the transformer housing part 2, the heat generated by the transformer part 1 can be simultaneously discharged to the outside from multiple directions, thereby improving the heat dissipation efficiency and effectively improving the heat dissipation effect.

[0129] The effect of this embodiment is particularly significant in the case of a transformer that generates a large amount of heat because a high frequency and a large current are required, such as a high-frequency isolation transformer.

[0130] <2> Second embodiment

[0131] [2-1] Transformer structure

[0132] based on Figure 8 to Figure 12 The structure of the transformer according to the second embodiment will be described.

[0133] The transformer in this embodiment is a device for transforming input power, and can be used as various types of transformers, such as an isolation transformer such as a high-frequency isolation transformer.

[0134] Figure 8 1 is a perspective view showing a transformer in a second embodiment of the present invention. Fig. 9 1 is an exploded view showing a transformer in a second embodiment of the present invention. Fig. 9 In order to illustrate the structure of the transformer unit 1, only a portion of the potting material 3 described later is shown.

[0135] like Figure 8 , Fig. 9 As shown, the transformer in this embodiment mainly includes a transformer portion 1 , a housing portion 2 , a potting member 3 , a left side cooling plate assembly 5 , and a right side cooling plate assembly 6 .

[0136] The transformer unit 1 is the same as that in the first embodiment, and therefore its description is omitted.

[0137] The casing 2 is a box-shaped component that accommodates the transformer 1 .

[0138] like Fig. 9 As shown, the housing portion 2 mainly includes a bottom plate 21 , a left side plate 22 (side plate), a right side plate 23 (side plate), a front side plate 24 , a rear side plate 25 , and a middle plate 26 .

[0139] The left side plate 22, the right side plate 23, the front side plate 24 and the rear side plate 25 are erected from the bottom plate 21 and fixed to the bottom plate 21, and together with the bottom plate 21, they enclose a hollow cavity with an opening at the top. The left side plate 22 and the right side plate 23 are arranged in a manner opposite to each other, and the front side plate 24 and the rear side plate 25 are arranged in a manner opposite to each other. The middle plate 26 is erected from the bottom plate 21 in the hollow cavity of the housing portion 2 and fixed thereto, and is opposite to the left side plate 22 and the right side plate 23, respectively. In addition, the middle plate 26 is lower in height than the left side plate 22, the right side plate 23, the front side plate 24 and the rear side plate 25.

[0140] The bottom plate 21 , the left side plate 22 , the right side plate 23 , the front side plate 24 , the rear side plate 25 , and the middle plate 26 may be made of a metal material such as aluminum, an aluminum alloy, or stainless steel.

[0141] The transformer unit 1 is installed in the hollow cavity of the housing 2 in such a manner that the input terminal 13 and the output terminal 14 of the transformer unit 1 are located on the top opening side of the hollow cavity and the intermediate plate 26 is inserted into the gap between the adjacent windings 12 of the transformer unit 1. In this state, the left side plate 22, the right side plate 23 and the intermediate plate 26 of the housing 2 are opposite to the windings 12 of the transformer unit 1, respectively.

[0142] In addition, if Fig. 9 As shown, in order to install the left side cooling plate assembly 5, a plurality of left side mounting ears 220 are provided on the left side plate 22, and threaded holes are formed on the plurality of left side mounting ears 220. In this embodiment, as an example, one left side mounting ear 220 is provided at each of the four corners of the left side plate 22, and a total of four are provided.

[0143] Similarly, in order to install the right side cooling plate assembly 6, a plurality of right side mounting ears 230 are provided on the right side plate 23, and threaded holes are formed on the plurality of right side mounting ears 230. In this embodiment, as an example, one right side mounting ear 230 is provided at each of the four corners of the right side plate 23, and a total of four are provided (only two are shown in the figure).

[0144] The potting material 3 is the same as that in the first embodiment, and therefore its description is omitted.

[0145] In addition to the above-described structure, the casing 2 also has a bottom surface cooling structure (a part of the cooling part) formed inside thereof for cooling the transformer 1 from the bottom plate 21 side by circulating a cooling medium with the outside of the transformer, similarly to the first embodiment.

[0146] Fig.10 FIG. 2 is a schematic diagram of the bottom plate 21 of the housing portion 2 of the transformer in the second embodiment. Fig.10 In the figure, for clarity, the flow direction of the cooling medium is marked with arrows.

[0147] like Fig.10 As shown, the bottom plate 21 includes a plate-shaped bottom plate body 211, a bottom plate circulation flow path 212 formed in the bottom plate body 211, a cooling medium inlet 213 (inlet) for the cooling medium cooled externally to flow into the bottom plate circulation flow path 212, and a cooling medium outlet 214 (outlet) for the cooling medium in the bottom plate circulation flow path 212 to flow out to the outside.

[0148] The bottom plate circulation flow path 212 of the bottom plate 21 constitutes a bottom surface cooling structure of the cooling unit.

[0149] The bottom plate circulation flow path 212 is formed in the bottom plate body 211 so as to extend in a meandering manner between the cooling medium inlet 213 and the cooling medium outlet 214 .

[0150] As an exemplary method, the bottom plate circulation flow path 212 mainly includes an inlet side connecting flow path area 212a, an inlet side detour flow path area 212b, a right side flow path area 212c, a connecting flow path area 212d, a left side flow path area 212e and an outlet side connecting flow path area 212f.

[0151] The inlet-side communication flow path area 212 a is a long and narrow flow path that communicates with the cooling medium inlet 213 and extends from the cooling medium inlet 213 toward the front plate 24 side.

[0152] The inlet-side detour flow path section 212b includes an upstream-side detour sub-section 212b1 and a downstream-side detour sub-section 212b2. The upstream-side detour sub-section 212b1 is connected to the downstream end of the inlet-side connecting flow path section 212a and extends in the direction from the right side plate 23 toward the left side plate 22. A plurality of fins 212b1f extending in the extending direction of the upstream-side detour sub-section 212b1 are formed in the upstream-side detour sub-section 212b1, and the plurality of fins 212b1f are arranged at intervals in the direction from the front side plate 24 toward the rear side plate 25. In addition, the downstream-side detour sub-section 212b2 is connected to the downstream end of the upstream-side detour sub-section 212b1 and extends in the direction from the left side plate 22 toward the right side plate 23. A plurality of fins 212b2f extending in the extending direction of the downstream detour sub-region 212b2 are formed in the downstream detour sub-region 212b2. The plurality of fins 212b2f are spaced apart in the direction from the front side plate 24 toward the rear side plate 25.

[0153] The right flow path area 212c is connected to the downstream end of the downstream side detour sub-area 212b2, and extends from the rear side plate 25 to the front side plate 24 to the vicinity of the front side plate 24. A plurality of fins 212cf extending along the extension direction of the right flow path area 212c are formed in the right flow path area 212c, and the plurality of fins 212cf are spaced apart in the direction from the left side plate 22 to the right side plate 23.

[0154] The communication flow path area 212d is connected to the downstream end of the right side flow path area 212c, and extends from the right side plate 23 to the left side plate 22 to the vicinity of the left side plate 22. A plurality of fins 212df extending along the extending direction of the communication flow path area 212d are formed in the communication flow path area 212d, and the plurality of fins 212df are arranged at intervals in the direction from the front side plate 24 to the rear side plate 25.

[0155] The left flow path area 212e is connected to the downstream end of the communication flow path area 212d, and extends from the front side plate 24 to the rear side plate 25 to the vicinity of the rear side plate 25. A plurality of fins 212ef extending along the extension direction of the left flow path area 212e are formed in the left flow path area 212e, and the plurality of fins 212ef are arranged at intervals in the direction from the left side plate 22 to the right side plate 23.

[0156] The outlet-side connecting flow path section 212f is a long and narrow flow path extending from the downstream end of the left flow path section 212e to the cooling medium outlet 214, connecting the two.

[0157] Thus, when the transformer is working, the cooling medium (e.g., distilled water, cooling oil, etc.) enters the bottom plate 21 from the outside through the cooling medium inlet 213, passes through the inlet side connecting flow path area 212a, the inlet side detour flow path area 212b, the right side flow path area 212c, the connecting flow path area 212d, the left side flow path area 212e, and the outlet side connecting flow path area 212f in sequence, absorbs heat, and then flows out from the cooling medium outlet 214 to the outside to dissipate heat. Thus, the bottom surface cooling structure cools the transformer 1 from the bottom plate 21 side through the circulation of the cooling medium between the outside of the transformer.

[0158] In addition, the bottom plate circulation flow path 212 may also be formed in other meandering shapes.

[0159] Furthermore, the bottom plate circulation flow path 212 has a left plate inlet branch flow path 212La communicating with the inlet-side connecting pipe 52 and a left plate outlet branch flow path 212Lb communicating with the outlet-side connecting pipe 53 for the left side cooling plate assembly 5 .

[0160] Furthermore, the bottom plate circulation flow path 212 has a right plate inlet branch flow path 212Ra communicating with the inlet-side connecting pipe 62 and a right plate outlet branch flow path 212Rb communicating with the outlet-side connecting pipe 63 for the right side cooling plate assembly 6 .

[0161] The left side cooling plate assembly 5 constitutes a left side cooling structure (a part of the cooling unit).

[0162] Fig.11 FIG. 5 is a schematic diagram of the left side cooling plate assembly 5 of the transformer in the second embodiment. Fig.11 In the figure, for clarity, the flow direction of the cooling medium is marked with arrows.

[0163] like Fig.11 As shown, the left side cooling plate assembly 5 mainly includes a left cooling flow path forming plate 51 , an inlet side connecting pipe 52 and an outlet side connecting pipe 53 .

[0164] The left cooling flow path forming plate 51 is formed with a left circulation flow path 511, a cooling medium inlet 512 for the cooling medium in the bottom plate circulation flow path 212 to flow into the left circulation flow path 511, and a cooling medium outlet 513 for the cooling medium in the left circulation flow path 511 to flow out to the bottom plate circulation flow path 212. Examples of the material of the left cooling flow path forming plate 51 include metals such as aluminum and aluminum alloys.

[0165] The left circulation flow path 511 is formed in the left cooling flow path forming plate 51 so as to extend in a meandering manner between the cooling medium inlet 512 and the cooling medium outlet 513 .

[0166] As an exemplary embodiment, the left circulation flow path 511 includes an upper flow path area 511a, a middle flow path area 511b, a lower flow path area 511c, and an outlet-side connecting flow path area 511d.

[0167] The upper flow path area 511a is formed in the upper region in the vertical direction of the left cooling flow path forming plate 51. The upper flow path area 511a is connected to the cooling medium inlet 512 and extends in the direction from the front side plate 24 toward the rear side plate 25. A plurality of fins 511af extending in the extension direction thereof are formed in the upper flow path area 511a, and the plurality of fins 511af are spaced apart in the vertical direction.

[0168] The middle flow path area 511b is formed in the middle area in the vertical direction of the left cooling flow path forming plate 51. The middle flow path area 511b is connected to the downstream end of the upper flow path area 511a, and extends in the direction from the rear side plate 25 toward the front side plate 24. A plurality of fins 511bf extending in the extending direction thereof are formed in the middle flow path area 511b, and the plurality of fins 511bf are spaced apart in the vertical direction.

[0169] The lower flow path area 511c is formed in the lower area in the vertical direction of the left cooling flow path forming plate 51. The lower flow path area 511c is connected to the downstream end of the middle flow path area 511b, and extends in the direction from the front side plate 24 toward the rear side plate 25. A plurality of fins 511cf extending in the extending direction thereof are formed in the lower flow path area 511c, and the plurality of fins 511cf are spaced apart in the vertical direction.

[0170] The outlet communication flow path area 511d is formed at the end area on the rear plate 25 side of the left cooling flow path forming plate 51. The outlet communication flow path area 511d communicates with the downstream end of the lower flow path area 511c and extends upward to the cooling medium outlet 513 in the vertical direction.

[0171] The inlet-side connecting pipe 52 connects the cooling medium inlet port 512 of the left cooling flow path forming plate 51 with the left plate inlet branch flow path 212La of the bottom plate circulation flow path 212 of the bottom plate 21 .

[0172] The outlet-side connecting pipe 53 connects the coolant outlet port 513 of the left cooling flow path forming plate 51 with the left plate outlet branch flow path 212Lb of the bottom plate circulation flow path 212 of the bottom plate 21 .

[0173] Thus, when the transformer is working, part of the cooling medium flowing into the bottom plate circulation flow path 212 of the bottom plate 21 from the outside enters the left circulation flow path 511 through the cooling medium inlet 512, and sequentially passes through the upper flow path area 511a, the middle flow path area 511b, the lower flow path area 511c and the outlet side connecting flow path area 511d to absorb the heat conducted from the transformer 1 through the left side plate 22, and then flows back to the bottom plate circulation flow path 212 of the bottom plate 21 through the cooling medium outlet 513, and flows from the bottom plate circulation flow path 212 to the outside to dissipate heat. Thus, the side cooling structure formed by the left side cooling plate assembly 5 cools the transformer 1 from the left side plate 22 side through the circulation of the cooling medium between the outside of the transformer.

[0174] In addition, the left circulation flow path 511 may be formed in other serpentine shapes.

[0175] In addition, if Fig. 9 As shown, a plurality of left-side mounting holes 510 are formed on the left cooling flow path forming plate 51 at positions corresponding to the plurality of left-side mounting ears 220 of the left plate 22. In this embodiment, as an example, one left-side mounting hole 510 is provided at each of the four corners of the left cooling flow path forming plate 51, and a total of four are provided. In this way, by passing a bolt (not shown) through the left-side mounting hole 510 of the left cooling flow path forming plate 51 and screwing it into the threaded hole of the left-side mounting ear 220 of the left plate 22, the left cooling flow path forming plate 51 is mounted and fixed to the left plate 22. Thus, the left side cooling plate assembly 5 is fixed to the housing portion 2 as a whole.

[0176] The right side cooling plate assembly 6 constitutes a right side cooling structure (a part of the cooling unit).

[0177] Fig.12 FIG. 6 is a schematic diagram of the right side cooling plate assembly 6 of the transformer in the second embodiment. Fig.12 In the figure, for clarity, the flow direction of the cooling medium is marked with arrows.

[0178] like Fig.12 As shown, the right side cooling plate assembly 6 mainly includes a right cooling flow path forming plate 61 , an inlet side connecting pipe 62 and an outlet side connecting pipe 63 .

[0179] The right cooling flow path forming plate 61 is formed with a right circulation flow path 611, a cooling medium inlet 612 for the cooling medium in the bottom plate circulation flow path 212 to flow into the right circulation flow path 611, and a cooling medium outlet 613 for the cooling medium in the right circulation flow path 611 to flow out of the bottom plate circulation flow path 212. Examples of the material of the right cooling flow path forming plate 61 include metals such as aluminum and aluminum alloys.

[0180] The right circulation flow path 611 is formed in the right cooling flow path forming plate 61 so as to extend in a meandering manner between the cooling medium inlet 612 and the cooling medium outlet 613 .

[0181] As an exemplary embodiment, the right circulation flow path 611 includes an upper flow path area 611a, a middle flow path area 611b, a lower flow path area 611c, and an outlet-side connecting flow path area 611d.

[0182] The upper flow path area 611a is formed in the upper region in the vertical direction of the right cooling flow path forming plate 61. The upper flow path area 611a is connected to the cooling medium inlet 612 and extends in the direction from the rear side plate 25 toward the front side plate 24. A plurality of fins 611af extending in the extension direction thereof are formed in the upper flow path area 611a, and the plurality of fins 611af are spaced apart in the vertical direction.

[0183] The middle flow path area 611b is formed in the middle area in the vertical direction of the right cooling flow path forming plate 61. The middle flow path area 611b is connected to the downstream end of the upper flow path area 611a, and extends in the direction from the front side plate 24 toward the rear side plate 25. A plurality of fins 611bf extending in the extending direction thereof are formed in the middle flow path area 611b, and the plurality of fins 611bf are spaced apart in the vertical direction.

[0184] The lower flow path area 611c is formed in the lower area in the vertical direction of the right cooling flow path forming plate 61. The lower flow path area 611c is connected to the downstream end of the middle flow path area 611b, and extends in the direction from the rear side plate 25 toward the front side plate 24. A plurality of fins 611cf extending in the extending direction thereof are formed in the lower flow path area 611c, and the plurality of fins 611cf are spaced apart in the vertical direction.

[0185] The outlet communication flow path area 611d is formed at the end area on the front plate 24 side of the right cooling flow path forming plate 61. The outlet communication flow path area 611d communicates with the downstream end of the lower flow path area 611c and extends upward to the cooling medium outlet 613 in the vertical direction.

[0186] The inlet-side connecting pipe 62 connects the cooling medium inlet port 612 of the right cooling flow path forming plate 61 with the right-side plate inlet branch flow path 212Ra of the bottom plate circulation flow path 212 of the bottom plate 21 .

[0187] The outlet-side connecting pipe 63 connects the coolant outlet port 613 of the right cooling flow path forming plate 61 with the right-side plate outlet branch flow path 212Rb of the bottom plate circulation flow path 212 of the bottom plate 21 .

[0188] Thus, when the transformer is working, part of the cooling medium flowing into the bottom plate circulation flow path 212 of the bottom plate 21 from the outside enters the right circulation flow path 611 through the cooling medium inlet 612, and sequentially passes through the upper flow path area 611a, the middle flow path area 611b, the lower flow path area 611c and the outlet side connecting flow path area 611d to absorb the heat conducted from the transformer 1 through the right side plate 23, and then flows back to the bottom plate circulation flow path 212 of the bottom plate 21 through the cooling medium outlet 613, and flows from the bottom plate circulation flow path 212 to the outside to dissipate heat. Thus, the side cooling structure formed by the right side cooling plate assembly 6 cools the transformer 1 from the right side plate 23 side through the circulation of the cooling medium between the outside of the transformer.

[0189] In addition, the right circulation flow path 611 may also be formed in other meandering shapes.

[0190] In addition, if Fig. 9 As shown, a plurality of right-side mounting holes 610 are formed on the right cooling flow path forming plate 61 at positions corresponding to the plurality of right-side mounting ears 230 of the right-side plate 23. In this embodiment, as an example, one right-side mounting hole 610 is provided at each of the four corners of the right cooling flow path forming plate 61, and a total of four are provided. In this way, by passing a bolt (not shown) through the right-side mounting hole 610 of the right cooling flow path forming plate 61 and screwing it into the threaded hole of the right-side mounting ear 230 of the right-side plate 23, the right-side cooling flow path forming plate 61 is mounted and fixed to the right-side plate 23. Thus, the right-side surface cooling plate assembly 6 is fixed to the housing portion 2 as a whole.

[0191] [2-2] Transformer Operation

[0192] Next, the operation of the transformer according to the second embodiment will be described.

[0193] When the transformer is operating, the transformer unit 1 converts the power input from the input terminal 13 into a desired voltage by electromagnetic induction, and outputs the desired voltage from the output terminal 14 .

[0194] At the same time, the cooling medium circulation / cooling equipment is started, and under the pumping action of its pump, the cooling medium flows from the cooling medium inlet 213 on the bottom plate 21 of the transformer into the bottom plate circulation flow path 212, and a part of it flows along the bottom plate circulation flow path 212 to absorb heat.

[0195] In addition, another part of the cooling medium flowing into the bottom plate circulation flow path 212 flows from the inlet side connecting pipe 62 of the right side cooling plate assembly 6 into the right cooling flow path forming plate 61, flows along it and absorbs heat, and then returns to the bottom plate circulation flow path 212 from the outlet side connecting pipe 63.

[0196] In addition, another part of the cooling medium flowing into the bottom plate circulation flow path 212 flows into the left cooling flow path forming plate 51 from the inlet side connecting pipe 52 of the left side cooling plate assembly 5, flows along it and absorbs heat, and then returns to the bottom plate circulation flow path 212 from the outlet side connecting pipe 53.

[0197] Then, these cooling media uniformly flow back to the cooling medium circulation / cooling equipment from the cooling medium flow outlet 214 on the bottom plate 21 of the transformer, have their heat absorbed by the heat exchanger of the cooling medium circulation / cooling equipment, and flow again into the bottom plate circulation flow path 212 of the bottom plate 21 of the transformer.

[0198] In this way, when the transformer is operating, the transformer unit 1 is cooled simultaneously from the bottom plate 21 side, the left side plate 22 side, and the right side plate 23 side of the housing portion 2 of the transformer.

[0199] [2-3] Technical Effects

[0200] According to the transformer of this embodiment, since the transformer part 1 is cooled not only from the bottom plate 21 side of the transformer housing part 2, but also from the left plate 22 side and the right plate 23 side of the transformer housing part 2, the heat generated by the transformer part 1 can be discharged to the outside from multiple directions at the same time, thereby also being able to improve the heat dissipation efficiency and effectively improve the heat dissipation effect.

[0201] The effect of this embodiment is particularly significant in the case of a transformer that generates a large amount of heat because a high frequency and a large current are required, such as a high-frequency isolation transformer.

[0202] <3> Third embodiment

[0203] [3-1] Transformer structure

[0204] based on Figure 13 to Figure 16 The structure of the transformer according to the third embodiment will be described.

[0205] The transformer in this embodiment is a device for transforming input power, and can be used as various types of transformers, such as an isolation transformer such as a high-frequency isolation transformer.

[0206] Fig.13 1 is a perspective view showing a transformer in a third embodiment of the present invention. Fig.14 1 is an exploded view showing a transformer in a third embodiment of the present invention. Fig.14In order to illustrate the structure of the transformer unit 1, only a portion of the potting material 3 described later is shown.

[0207] like Fig.13 , Fig.14 As shown, the transformer in this embodiment mainly includes a transformer portion 1, a housing portion 2, a potting member 3, a left heat pipe 7, a right heat pipe 8 and a middle heat pipe 9.

[0208] The transformer unit 1 is the same as that in the first embodiment, and therefore its description is omitted.

[0209] The casing 2 is a box-shaped component that accommodates the transformer 1 .

[0210] like Fig.14 As shown, the housing portion 2 mainly includes a bottom plate 21 , a left side plate 22 (side plate), a right side plate 23 (side plate), a front side plate 24 , a rear side plate 25 , and a middle plate 26 .

[0211] The left side plate 22, the right side plate 23, the front side plate 24 and the rear side plate 25 are erected from the bottom plate 21 and fixed to the bottom plate 21, and together with the bottom plate 21, they enclose a hollow cavity with an opening at the top. The left side plate 22 and the right side plate 23 are arranged in a manner opposite to each other, and the front side plate 24 and the rear side plate 25 are arranged in a manner opposite to each other. The middle plate 26 is erected from the bottom plate 21 in the hollow cavity of the housing portion 2 and fixed thereto, and is opposite to the left side plate 22 and the right side plate 23, respectively. In addition, the middle plate 26 is lower in height than the left side plate 22, the right side plate 23, the front side plate 24 and the rear side plate 25.

[0212] The left side plate 22, the right side plate 23, and the middle plate 26 are formed into a hollow structure with an open bottom.

[0213] The bottom plate 21 , the left side plate 22 , the right side plate 23 , the front side plate 24 , the rear side plate 25 , and the middle plate 26 may be made of a metal material such as aluminum, an aluminum alloy, or stainless steel.

[0214] The transformer unit 1 is installed in the hollow cavity of the housing 2 in such a manner that the input terminal 13 and the output terminal 14 of the transformer unit 1 are located on the top opening side of the hollow cavity and the intermediate plate 26 is inserted into the gap between the adjacent windings 12 of the transformer unit 1. In this state, the left side plate 22, the right side plate 23 and the intermediate plate 26 of the housing 2 are opposite to the windings 12 of the transformer unit 1, respectively.

[0215] The potting material 3 is the same as that in the first embodiment, and therefore its description is omitted.

[0216] In addition to the above-described structure, the casing 2 has a bottom surface cooling structure (a part of the cooling part) formed inside for cooling the transformer 1 from the bottom plate 21 side by circulating a cooling medium with the outside of the transformer, similar to the first or second embodiment.

[0217] Specifically, the bottom plate 21 is similar to the first or second embodiment in that it includes a plate-shaped bottom plate body, a bottom plate circulation flow path formed in the bottom plate body, a cooling medium inlet 213 for the cooling medium cooled outside to flow into the bottom plate circulation flow path, and a cooling medium outlet 214 for the cooling medium in the bottom plate circulation flow path to flow out to the outside. The bottom plate 21 is different from the first or second embodiment in that the bottom plate circulation flow path does not form an opening connected to the left plate 22, the right plate 23, and the middle plate 26, and the cooling medium does not circulate between these plates.

[0218] The bottom plate circulation flow path of the bottom plate 21 in the present embodiment is formed in the bottom plate body so as to extend in a meandering manner between the cooling medium inlet 213 and the cooling medium outlet 214 .

[0219] As an illustrative form, the bottom plate circulation flow path of the bottom plate 21 in this embodiment may extend in a meandering manner like the bottom plate circulation flow path 212 in the first embodiment, or may extend in a meandering manner like the bottom plate circulation flow path 212 in the second embodiment.

[0220] In addition, the bottom plate circulation flow path of the bottom plate 21 may be formed in other meandering shapes.

[0221] Thus, when the transformer is working, the cooling medium enters the bottom plate 21 from the outside through the cooling medium inlet 213 of the bottom plate 21, absorbs heat through the serpentine bottom plate circulation flow path, and then flows out from the cooling medium outlet 214 to the outside to dissipate heat. Thus, the bottom surface cooling structure cools the transformer 1 from the bottom plate 21 side through the circulation of the cooling medium between the outside of the transformer.

[0222] The left heat pipe 7 constitutes a left side cooling structure (a part of the cooling unit).

[0223] Fig.15 Schematic diagram of a heat pipe used in a transformer in the third embodiment.

[0224] like Fig.15 As shown, the left heat pipe 7 is roughly formed into an L shape, including an evaporation section 71 (heat absorption section), an insulation section 72 and a condensation section 73 (heat dissipation section) connected in sequence, and a cooling medium that can circulate between the evaporation section 71, the insulation section 72 and the condensation section 73 is sealed inside.

[0225] The evaporation section 71, the insulation section 72, and the condensation section 73 of the left heat pipe 7 can be formed into various cross-sectional shapes. In this embodiment, in order to facilitate positioning and installation, the evaporation section 71, the insulation section 72, and the condensation section 73 of the left heat pipe 7 are formed into a cross-sectional shape with a substantially flat side in contact with the bottom plate 21 of the housing portion 2, for example, they can be formed into a rectangular shape.

[0226] In addition, as a material for the left heat pipe 7, a metal material with good thermal conductivity such as copper or aluminum is preferred.

[0227] Fig.16 It is a perspective view showing the assembly method of the heat pipe in the third embodiment.

[0228] like Fig.16 As shown, the left heat pipe 7 is arranged in a manner that a part of the condensation section 73 and the insulation section 72 are in contact with the bottom plate 21, and another part of the evaporation section 71 and the insulation section 72 are inserted and fixed into the left plate 22 from the lower opening of the left plate 22. Here, as a fixing method between the left heat pipe 7 and the left plate 22, for example, an interference fit can be adopted, that is, the left heat pipe 7 is fixed to the left plate 22 by inserting the left heat pipe 7 into the inner cavity of the left plate 22 in an interference fit manner. Alternatively, as a fixing method between the left heat pipe 7 and the left plate 22, brazing can also be adopted, that is, the left heat pipe 7 is fixed to the left plate 22 by inserting the left heat pipe 7 into the inner cavity of the left plate 22 and brazing the two together. Of course, other fixing methods can also be adopted.

[0229] In addition, if Fig.16 As shown, a plurality of left-side heat pipes 7 are provided, and the plurality of left-side heat pipes 7 are provided at intervals in a direction from the front side plate 24 toward the rear side plate 25 .

[0230] Thus, when the transformer is working, the cooling medium in the evaporation section 71 of the left heat pipe 7 absorbs the heat from the transformer section 1 and then vaporizes, passes through the adiabatic section 72 to reach the condensation section 73, is cooled and liquefied by the bottom surface cooling structure of the bottom plate 21 in the condensation section 73, and then passes through the adiabatic section 72 to return to the evaporation section 71. Through such circulation of the cooling medium, the transformer section 1 is cooled. Thus, the side cooling structure formed by the left heat pipe 7 cools the transformer section 1 from the left side of the plate 22 by circulating the cooling medium between the evaporation section 71 as the heat absorption section and the condensation section 73 as the heat dissipation section.

[0231] The right heat pipe 8 constitutes a right side cooling structure (a part of the cooling unit).

[0232] like Fig.15 As shown, the right heat pipe 8 is roughly formed into an L shape, including an evaporation section 81 (heat absorption section), an insulation section 82 and a condensation section 83 (heat dissipation section) connected in sequence, and a cooling medium that can circulate between the evaporation section 81, the insulation section 82 and the condensation section 83 is sealed inside.

[0233] The evaporation section 81, the insulation section 82, and the condensation section 83 of the right heat pipe 8 can be formed into various cross-sectional shapes. In this embodiment, in order to facilitate positioning and installation, the evaporation section 81, the insulation section 82, and the condensation section 83 of the right heat pipe 8 are formed into a cross-sectional shape in which the side in contact with the bottom plate 21 of the housing portion 2 is a substantially flat surface, for example, a rectangular shape or the like.

[0234] In addition, as a material for the right heat pipe 8, a metal material with good thermal conductivity such as copper or aluminum is preferred.

[0235] like Fig.16 As shown, the right heat pipe 8 is arranged in a manner that a part of the condensation section 83 and the insulation section 82 are in contact with the bottom plate 21, and another part of the evaporation section 81 and the insulation section 82 are inserted and fixed into the right side plate 23 from the lower opening of the right side plate 23. Here, as a fixing method between the right heat pipe 8 and the right side plate 23, for example, an interference fit can be adopted, that is, the right heat pipe 8 is fixed to the right side plate 23 by inserting the right heat pipe 8 into the inner cavity of the right side plate 23 in an interference fit manner. Alternatively, as a fixing method between the right heat pipe 8 and the right side plate 23, brazing can also be adopted, that is, the right heat pipe 8 is fixed to the right side plate 23 by inserting the right heat pipe 8 into the inner cavity of the right side plate 23 and brazing the two together. Of course, other fixing methods can also be adopted.

[0236] In addition, if Fig.16 As shown, a plurality of right-side heat pipes 8 are provided, and the plurality of right-side heat pipes 8 are provided at intervals in a direction from the front side plate 24 toward the rear side plate 25 .

[0237] Thus, when the transformer is working, the cooling medium in the evaporation section 81 of the right heat pipe 8 absorbs the heat from the transformer section 1 and then vaporizes, passes through the adiabatic section 82 to reach the condensation section 83, is cooled and liquefied by the bottom surface cooling structure of the bottom plate 21 in the condensation section 83, and then passes through the adiabatic section 82 to return to the evaporation section 81. Through such circulation of the cooling medium, the transformer section 1 is cooled. Thus, the side cooling structure formed by the right heat pipe 8 cools the transformer section 1 from the right side of the plate 23 by circulating the cooling medium between the evaporation section 81 as the heat absorption section and the condensation section 83 as the heat dissipation section.

[0238] The intermediate heat pipe 9 constitutes an intermediate cooling structure (a part of the cooling unit).

[0239] like Fig.15 As shown, the intermediate heat pipe 9 is roughly formed into an L shape, including an evaporation section 91 (heat absorption section), an insulation section 92 and a condensation section 93 (heat dissipation section) connected in sequence, and a cooling medium that can circulate between the evaporation section 91, the insulation section 92 and the condensation section 93 is sealed inside.

[0240] The evaporation section 91, the insulation section 92, and the condensation section 93 of the intermediate heat pipe 9 can be formed into various cross-sectional shapes. In this embodiment, in order to facilitate positioning and installation, the evaporation section 91, the insulation section 92, and the condensation section 93 of the intermediate heat pipe 9 are formed into a cross-sectional shape in which the side in contact with the bottom plate 21 of the housing portion 2 is a substantially flat surface, for example, a rectangular shape or the like.

[0241] In addition, as a material for the intermediate heat pipe 9, a metal material with good thermal conductivity such as copper and aluminum is preferable.

[0242] like Fig.16 As shown, the intermediate heat pipe 9 is arranged in a manner that a part of the condensation section 93 and the insulation section 92 are in contact with the bottom plate 21, and another part of the evaporation section 91 and the insulation section 92 are inserted and fixed into the intermediate plate 26 from the lower opening of the intermediate plate 26. Here, as a fixing method between the intermediate heat pipe 9 and the intermediate plate 26, for example, an interference fit can be used, that is, the intermediate heat pipe 9 is fixed to the intermediate plate 26 by inserting it into the inner cavity of the intermediate plate 26 in an interference fit manner. Alternatively, as a fixing method between the intermediate heat pipe 9 and the intermediate plate 26, brazing can also be used, that is, the intermediate heat pipe 9 is fixed to the intermediate plate 26 by inserting it into the inner cavity of the intermediate plate 26 and brazing the two together. Of course, other fixing methods can also be used.

[0243] In addition, if Fig.16 As shown, a plurality of intermediate heat pipes 9 are provided, and the plurality of intermediate heat pipes 9 are provided at intervals in a direction from the front side plate 24 toward the rear side plate 25 .

[0244] And, if Fig.16 As shown, on the bottom plate 21, a part of the multiple intermediate heat pipes 9 and the multiple left-side heat pipes 7 are arranged alternately with each other in the direction from the front side plate 24 toward the rear side plate 25, and another part of the multiple intermediate heat pipes 9 and the multiple right-side heat pipes 8 are arranged alternately with each other in the direction from the front side plate 24 toward the rear side plate 25.

[0245] Thus, when the transformer is working, the cooling medium in the evaporation section 91 of the intermediate heat pipe 9 absorbs the heat from the transformer section 1 and then vaporizes, passes through the adiabatic section 92 to reach the condensation section 93, is cooled and liquefied by the bottom surface cooling structure of the bottom plate 21 in the condensation section 93, and then passes through the adiabatic section 92 to return to the evaporation section 91. Through such circulation of the cooling medium, the transformer section 1 is cooled. Thus, the intermediate cooling structure formed by the intermediate heat pipe 9 cools the transformer section 1 from the intermediate plate 26 side by the circulation of the cooling medium between the evaporation section 91 as the heat absorption section and the condensation section 93 as the heat dissipation section.

[0246] [3-2] Transformer Operation

[0247] Next, the operation of the transformer according to the third embodiment will be described.

[0248] When the transformer is operating, the transformer unit 1 converts the power input from the input terminal 13 into a desired voltage by electromagnetic induction, and outputs the desired voltage from the output terminal 14 .

[0249] At the same time, the cooling medium circulation / cooling equipment is started, and under the pumping action of its pump, the cooling medium flows from the cooling medium inlet on the bottom plate 21 of the transformer into the bottom plate circulation flow path of the bottom plate 21, flows along the bottom plate circulation flow path of the bottom plate 21 and absorbs heat.

[0250] In addition, the left heat pipe 7 absorbs heat from the left plate 22 and dissipates heat to the bottom plate 21 through the circulation of the cooling medium in its evaporation section 71 , insulation section 72 , and condensation section 73 .

[0251] Furthermore, the right heat pipe 8 absorbs heat from the right plate 23 and dissipates heat to the bottom plate 21 through the circulation of the cooling medium in its evaporation section 81 , the insulation section 82 , and the condensation section 83 .

[0252] Furthermore, the intermediate heat pipe 9 absorbs heat from the intermediate plate 26 and dissipates heat to the bottom plate 21 through the circulation of the cooling medium in its evaporation section 91 , the insulation section 92 , and the condensation section 93 .

[0253] In this way, the transformer unit 1 is cooled simultaneously from the bottom plate 21 side, the left side plate 22 side, the right side plate 23 side, and the middle plate 26 side of the case portion 2 of the transformer.

[0254] [3-3] Technical Effects

[0255] According to the transformer of this embodiment, since the transformer part 1 is cooled not only from the bottom plate 21 side of the transformer housing part 2, but also from the left plate 22 side, the right plate 23 side and the middle plate 26 side of the transformer housing part 2, the heat generated by the transformer part 1 can be simultaneously discharged to the outside from multiple directions, thereby improving the heat dissipation efficiency and effectively improving the heat dissipation effect.

[0256] The effect of this embodiment is particularly significant in the case of a transformer that generates a large amount of heat because a high frequency and a large current are required, such as a high-frequency isolation transformer.

[0257] <4> other

[0258] The above describes the various embodiments of the present invention, but these embodiments are proposed for easy understanding of the present invention, and the protection scope of the present invention is not limited to these embodiments. The above embodiments can be combined with each other within the scope that does not cause technical contradictions. In addition, those skilled in the art can make various deformations to these embodiments without departing from the technical idea of ​​the present invention. Below, these combinations and deformations are illustrated.

[0259] (1) In the first or third embodiment described above, the side cooling structures are formed in the left and right plates 22 and 23 and the middle cooling structure is formed in the middle plate 22, but the present invention is not limited thereto.

[0260] For example, a side cooling structure may be formed in the left plate 22 and the right plate 23 instead of forming an intermediate cooling structure in the intermediate plate 22, which can also effectively improve the heat dissipation effect.

[0261] Alternatively, an intermediate cooling structure may be formed in the intermediate plate 22 instead of forming side cooling structures in the left plate 22 and the right plate 23 , which can also improve the heat dissipation effect to a certain extent.

[0262] Alternatively, the side cooling structure may be provided only on one of the left plate 22 and the right plate 23 , and the middle cooling structure may be provided or not provided on the middle plate 22 .

[0263] Similarly, in the second embodiment, the side cooling structure is installed on both the left plate 22 and the right plate 23, but the second embodiment is not limited thereto. For example, the side cooling structure may be installed on only one of the left plate 22 and the right plate 23.

[0264] (2) In the above-mentioned embodiments, the side cooling structure is provided on the side plate of the housing portion 2 that is opposite to the winding 22 of the transformer portion 1 , but the present invention is not limited thereto.

[0265] For example, the side cooling structure may be provided on the side plate of the housing 2 that faces the winding 22 of the transformer 1 and the side plate that faces the core 21 .

[0266] Alternatively, the side cooling structure may be provided only on the side plate facing the core 21 .

[0267] (3) In the first and second embodiments described above, a zigzag structure is described for the side cooling structure. However, the first embodiment may adopt the zigzag structure of the second embodiment, and the second embodiment may adopt the zigzag structure of the first embodiment.

[0268] In addition, regarding the bottom surface cooling structure, the first and second embodiments described above also each have a meandering structure, but the first embodiment may adopt the meandering structure in the second embodiment, and the second embodiment may also adopt the meandering structure in the first embodiment.

[0269] In addition, the above-mentioned meandering structure is not essential and may not be a meandering structure.

[0270] (4) In the first embodiment described above, the inlet and outlet connected to the external cooling medium circulation / cooling device are formed on the bottom plate, but the present invention is not limited to this.

[0271] For example, the inlet and outlet may be provided on the side plate where the side cooling structure is provided. Alternatively, the inlet and outlet may be provided on the middle plate. Alternatively, one of the inlet and outlet may be provided on one of the bottom plate, the side plate and the middle plate, and the other of the inlet and outlet may be provided on the other of the bottom plate, the side plate and the middle plate. In short, as long as the normal circulation flow of the cooling medium in the bottom plate, the side plate and the middle plate can be ensured, it will be sufficient.

[0272] Similarly, in the second embodiment, an inlet and an outlet for connecting to an external cooling medium circulation / cooling device may be provided on the left side cooling plate assembly 5 or the right side cooling plate assembly 6. Alternatively, one of the inlet and the outlet may be provided on one of the bottom plate, the left side cooling plate assembly 5, and the right side cooling plate assembly 6, and the other of the inlet and the outlet may be provided on the other of the bottom plate, the left side cooling plate assembly 5, and the right side cooling plate assembly 6. In short, as long as the normal circulation flow of the cooling medium in the bottom plate, the left side cooling plate assembly 5, and the right side cooling plate assembly 6 can be ensured, it will be sufficient.

[0273] (5) In the first and second embodiments, the flow path of the bottom cooling structure is connected to the flow path of the side cooling structure, but the present invention is not limited thereto. The flow path of the bottom cooling structure and the flow path of the side cooling structure may be independent of each other and each may have an inlet and an outlet connected to an external cooling medium circulation / cooling device, so that the cooling medium circulates independently of each other.

[0274] In addition, in the first embodiment, the flow path of the bottom surface cooling structure is connected to the flow path of the intermediate cooling structure, but the present invention is not limited thereto. The flow path of the bottom surface cooling structure and the flow path of the intermediate cooling structure may be independent of each other and each of them may have an inlet and an outlet connected to an external cooling medium circulation / cooling device, so that the cooling medium circulates independently of each other.

[0275] (6) In the third embodiment, heat pipes are used as the side cooling structure and the middle cooling structure, but the present embodiment is not limited thereto. For example, capillary tubes may be used as the side cooling structure and the middle cooling structure. In short, any structure may be used as long as it can absorb heat from the side plates and the middle plates in the heat absorption section and dissipate heat to the bottom plate in the heat dissipation section.

[0276] (7) The side cooling structures and the intermediate cooling structures of the above-mentioned embodiments may be used in any combination.

[0277] For example, in the first embodiment, either the side cooling structure or the middle cooling structure may be replaced with the cooling structure using the heat pipe in the third embodiment.

[0278] For another example, in the first embodiment, either or both of the side cooling structures may be replaced with the side cooling structures in the second embodiment.

[0279] The same applies to the second embodiment and the third embodiment.

[0280] (8) In the above embodiments, the bottom cooling structure, the side cooling structure, and the middle cooling structure are directly formed in the corresponding components, but the present invention is not limited thereto. For example, the bottom cooling structure, the side cooling structure, and the middle cooling structure may be formed as tubular components and installed in the internal space of the corresponding components. Alternatively, a combination of the two may be used.

Claims

1. A transformer, comprising: A transformer that transforms input power; A housing portion, comprising a bottom plate and side plates rising from the bottom plate, wherein the bottom plate and the side plates are used to enclose a hollow cavity for accommodating the transformer portion; and A cooling unit that cools the voltage transformation unit; The transformer is characterized in that The cooling unit comprises: a bottom surface cooling structure provided on the bottom plate, for cooling the transformer unit from the bottom plate side by circulating a cooling medium between the bottom plate and the outside of the transformer; and The side cooling structure is provided on the side plate and cools the transformer unit from the side plate by circulating a cooling medium between the side plate and the outside of the transformer.

2. The transformer according to claim 1, characterized in that: The flow path of the bottom surface cooling structure and the flow path of the side surface cooling structure are communicated with each other.

3. The transformer according to claim 2, characterized in that: The flow path of the bottom surface cooling structure includes an outflow port through which the cooling medium flows out to the outside, and an inflow port through which the cooling medium cooled at the outside flows in.

4. The transformer according to claim 1, characterized in that: The flow path of the bottom cooling structure and / or the flow path of the side cooling structure extend in a meandering manner.

5. The transformer according to claim 1, characterized in that: The side cooling structure is arranged on a side plate of the side plates which is opposite to the winding of the transformer unit.

6. The transformer according to claim 1, characterized in that: The transformer is a high-frequency isolation transformer.

7. The transformer according to any one of claims 1 to 6, characterized in that: The bottom surface cooling structure is arranged in the bottom plate, The side cooling structure is arranged in the side plate.

8. The transformer according to claim 7, characterized in that: The housing portion includes an intermediate plate rising from the bottom plate in the hollow cavity, and the intermediate plate is inserted into the gap between the adjacent windings of the transformer portion. The cooling unit includes an intermediate cooling structure that is provided in the intermediate plate and cools the transformer unit from the intermediate plate side by circulating a cooling medium with the outside of the transformer.

9. The transformer according to claim 8, characterized in that: The flow path of the bottom surface cooling structure and the flow path of the intermediate cooling structure are communicated with each other.

10. The transformer according to claim 8, characterized in that: The flow path of the intermediate cooling structure extends in a meandering manner.

11. The transformer according to any one of claims 1 to 6, characterized in that: The bottom surface cooling structure is arranged in the bottom plate, The side cooling structure is composed of a side cooling flow path forming plate which is mounted on the side plate and forms a flow path through which the cooling medium flows.

12. A transformer, comprising: A transformer that transforms input power; A housing portion, comprising a bottom plate and side plates rising from the bottom plate, wherein the bottom plate and the side plates are used to enclose a hollow cavity for accommodating the transformer portion; and A cooling unit that cools the voltage transformation unit; The transformer is characterized in that The cooling unit comprises: a bottom surface cooling structure provided on the bottom plate, for cooling the transformer unit from the bottom plate side by circulating a cooling medium between the bottom plate and the outside of the transformer; and The side cooling structure has a heat absorbing section arranged on the side plate and a heat dissipating section arranged in contact with the bottom cooling structure, and the transformer is cooled from the side plate side by circulating a cooling medium between the heat absorbing section and the heat dissipating section.

13. The transformer according to claim 12, characterized in that: The side cooling structure is arranged in a side plate of the side plate opposite to the winding of the transformer unit.

14. The transformer according to claim 12, characterized in that: The side cooling structure is composed of a heat pipe, the evaporation section of the heat pipe constitutes the heat absorption section of the side cooling structure, and the condensation section of the heat pipe constitutes the heat dissipation section of the side cooling structure.

15. The transformer according to claim 12, characterized in that: The housing portion includes an intermediate plate rising from the bottom plate in the hollow cavity, and the intermediate plate is inserted into the gap between the adjacent windings of the transformer portion. The cooling unit includes an intermediate cooling structure having a heat absorbing section arranged in the intermediate plate and a heat dissipating section arranged in contact with the bottom surface cooling structure, and the transformer unit is cooled from the intermediate plate side by circulation of a cooling medium between the heat absorbing section and the heat dissipating section.

16. The transformer according to claim 15, characterized in that The intermediate cooling structure is composed of a heat pipe, the evaporation section of the heat pipe constitutes the heat absorption section of the intermediate cooling structure, and the condensation section of the heat pipe constitutes the heat dissipation section of the intermediate cooling structure.

17. The transformer according to any one of claims 12 to 16, characterized in that The transformer is a high-frequency isolation transformer.

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