A photovoltaic box transformer with high heat dissipation

Abstract

The present invention discloses a photovoltaic box transformer with high heat dissipation, including a transformer body and a heat sink, the heat sink includes a heat dissipation pipe group and a heat dissipation fan, the heat dissipation pipe group includes a water inlet pipe and a water outlet pipe, and a plurality of cooling pipes connected between the water inlet pipe and the water outlet pipe, each cooling pipe is located on the side of the heat sink away from the transformer body, the two ends of each cooling pipe are bent in the direction of the transformer body, and vertically extend through the heat sink, the two ends of each cooling pipe form an extension pipe section respectively, and the two extension pipe sections are symmetrically arranged along the transformer body; each extension pipe section is provided with a support plate perpendicular to the heat sink on the side away from the transformer body, each support plate is provided with a slideway, an electronic slide is provided in the slideway for circulating sliding along the sliding path of the slideway, and a heat dissipation fan is provided on the side of the electronic slide facing the transformer body. The double-layer cooling in the technical solution proposed by the present invention accelerates the cooling efficiency of the transformer body, and avoids power accidents due to high temperature of the transformer body.

Description

Technical Field

[0001] The invention relates to the field of electric power technology, and in particular to a photovoltaic box-type transformer with high heat dissipation. Background Art

[0002] Photovoltaic box transformer refers to a box-type substation used in photovoltaic power plants, also called prefabricated substation or prefabricated substation. It is a factory-prefabricated indoor and outdoor compact distribution equipment that is arranged in a certain wiring scheme and integrates high-voltage switchgear, distribution transformers and low-voltage distribution devices. It organically combines transformer step-down, low-voltage distribution and other functions and is installed in a fully enclosed steel structure box.

[0003] Existing photovoltaic box transformers are directly installed outdoors, especially photovoltaic power stations are located in areas with long sunshine hours, which will cause the temperature inside the photovoltaic box transformer to rise rapidly in summer. The transformer used in the photovoltaic box transformer is a high-heat electrical accessory. Therefore, the transformer is in a high-temperature photovoltaic box transformer and cannot be cooled quickly and efficiently, which will pose a certain safety hazard. Summary of the invention

[0004] The main purpose of the present invention is to provide a photovoltaic box-type transformer with high heat dissipation, aiming to solve the problem of transformer heat dissipation difficulty.

[0005] To achieve the above purpose, the technical solution proposed by the present invention is:

[0006] A photovoltaic box transformer with high heat dissipation comprises a transformer body and a heat sink for placing the transformer body, the heat sink comprises a heat dissipation pipe group and a heat dissipation fan, the heat dissipation pipe group comprises a water inlet pipe and a water outlet pipe for respectively connecting to an external water source, and a plurality of cooling pipes connected between the water inlet pipe and the water outlet pipe, each of the cooling pipes is located on a side of the heat sink away from the transformer body, both ends of each cooling pipe are bent toward the direction of the transformer body and vertically extend through the heat sink, both ends of each cooling pipe form an extended pipe section respectively, the two extended pipe sections are symmetrically arranged along the transformer body, and the extended pipe sections located on the same side of the transformer body are located in the same plane; a support plate perpendicular to the heat dissipation seat is arranged on a side of each extended pipe section away from the transformer body, each support plate is provided with a slideway parallel to each extended pipe section, an electronic slide seat that slides cyclically along the sliding path of the slideway is arranged in the slideway, and the heat dissipation fan is arranged on the side of the electronic slide seat facing the transformer body.

[0007] Preferably, the cooling tubes are arranged at intervals, and a plurality of heat sinks are arranged on the side of the transformer body facing the support plate, and the heat sinks are arranged at intervals and parallel to the extended pipe sections; the heat sinks are symmetrically arranged along the transformer body, and each heat sink is located between the transformer body and the extended pipe section, one end of the heat sink is connected to the cooling tube, and the other end is connected to the transformer body.

[0008] Preferably, each cooling tube has a first wire groove on the side facing the transformer body; a plurality of second wire grooves parallel to the first wire grooves are respectively formed on both sides of the transformer body facing the two support plates, the second wire grooves on both sides of the transformer body are symmetrically arranged, and each pair of two second wire grooves symmetrical along the transformer body are opposite to the first wire groove of a cooling tube; one end of a heat sink is inserted into the second wire groove on one side of the transformer body, and the other end is inserted into the first wire groove of the cooling tube opposite to the second wire groove, so that the cooling tube and the transformer body clamp the heat sink.

[0009] Preferably, the water inlet pipe and the water outlet pipe are insulated pipes; each of the cooling pipes is a copper pipe; the heat sink is a copper sheet; a booster pump is provided on the water outlet pipe, and the booster pump is used to accelerate the flow rate of water flowing through the water inlet pipe, each of the cooling pipes and the water outlet pipe in sequence.

[0010] Preferably, the photovoltaic box-type transformer with high heat dissipation also includes a liquid nitrogen tank, and two nozzles are arranged on the side of the heat dissipation seat facing the transformer body, and each of the nozzles is symmetrically arranged along the transformer body, one of the nozzles is located between the transformer body and an extended pipe section of the cooling pipe, and the other of the nozzles is located between the transformer body and another extended pipe section of the cooling pipe; the liquid nitrogen tank also includes nitrogen delivery pipes respectively connected to each of the nozzles, so that the liquid nitrogen passes through the nitrogen delivery pipe and each of the nozzles and is sprayed between the transformer body and each of the extended pipe sections.

[0011] Preferably, the high-heat dissipation photovoltaic box-type transformer also includes a limit frame, which is arranged perpendicular to the heat sink, and one end of the limit frame passes through the heat sink for fixed connection with the ground; a fixing frame is arranged on the side of the limit frame facing the transformer body, and the fixing frame includes a fixing rod located on the side of the transformer body away from the limit frame, and connecting rods respectively connected to both ends of the fixing rod, and one end of each connecting rod away from the fixing rod is detachably connected to the limit frame.

[0012] Preferably, the limit frame has a plurality of screw holes spaced apart along the extension direction of the extension pipe segment; a fixing plate is fixedly arranged at one end of each connecting rod away from the fixing rod, and the fixing plate has at least two through holes spaced apart along the extension direction of the extension pipe segment, and the distance between adjacent through holes is equal to the distance between adjacent screw holes, and the fixing plate and the limit frame are fixedly connected by bolts passing through the screw holes and the through holes.

[0013] Preferably, a limiting plate is arranged on the side of the heat sink facing the transformer body, the limiting plate is located on the side of the transformer body away from the limiting frame, and the limiting plate is provided with a heat dissipation hole.

[0014] Preferably, a limiting groove is provided on the side of the heat sink facing the transformer body, and the limiting groove is used to place the transformer body; a heat dissipation hole is provided at the bottom of the limiting groove, and the heat dissipation hole is directly opposite to each of the cooling tubes.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The cold water passing through the cooling pipe takes away the heat of the transformer body. At the same time, the wind blown to the transformer body by the cooling fan passes through the cooling pipe and then contacts the transformer body. The cooling fan circulates through the electronic slide seat so that the wind of the cooling fan can blow to the entire transformer body. The double-layer cooling speeds up the cooling efficiency of the transformer body and avoids power accidents caused by high temperature of the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a photovoltaic box-type transformer with high heat dissipation of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure at AA without the transformer body and the limit frame;

[0020] Figure 3 It is a schematic diagram of the top view of the heat sink;

[0021] Figure 4 It is a schematic diagram of the side structure of the transformer body.

[0022] Description of Figure Numbers:

[0023]

[0024]

[0025] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides a photovoltaic box-type transformer with high heat dissipation.

[0032] like Figures 1 to 4 A photovoltaic box transformer with high heat dissipation shown in the figure comprises a transformer body 1 and a heat sink 2 for placing the transformer body 1, wherein the transformer body 1 and the heat sink 2 are detachably connected; the heat sink 2 comprises a heat sink pipe group 3 and a heat sink fan 4, the heat sink pipe group 3 comprises a water inlet pipe 31 and a water outlet pipe 32 for respectively connecting to an external water source, and a plurality of cooling pipes 33 connected between the water inlet pipe 31 and the water outlet pipe 32, each cooling pipe 33 is located on a side of the heat sink 2 away from the transformer body 1, and both ends of each cooling pipe 33 are bent toward the direction of the transformer body 1 and extend vertically through The heat sink 2, both ends of each cooling tube 33 form an extension tube section 331, the two extension tube sections 331 are symmetrically arranged along the transformer body 1, and the extension tube sections 331 located on the same side of the transformer body 1 are located in the same plane; a support plate 21 perpendicular to the heat sink 2 is arranged on the side of each extension tube section 331 away from the transformer body 1, each support plate 21 is provided with a slideway 22 parallel to each extension tube section 331, an electronic slide 23 that circulates and slides along the sliding path of the slide 22 is arranged in the slideway 22, and a heat dissipation fan 4 is arranged on the side of the electronic slide 23 facing the transformer body 1.

[0033] Specifically, the cooling tube 33 is a U-shaped tube, so that the cooling tube 33 surrounds the bottom and both sides of the transformer, so that the heat dissipation of the transformer body 1 has no dead angle.

[0034] The cold water passing through the cooling pipe 33 takes away the heat of the transformer body 1, and at the same time, the wind blown toward the transformer body 1 by the heat dissipation fan 4 passes through the cooling pipe 33 and then contacts the transformer body 1; the heat dissipation fan 4 circulates through the electronic slide 23, so that the wind of the heat dissipation fan 4 can blow toward the entire transformer body 12, and the double-layer cooling speeds up the cooling efficiency of the transformer body 1, thereby avoiding power accidents caused by high temperature of the transformer body 1.

[0035] Specifically, the photovoltaic box transformer with high heat dissipation also includes a controller and a plurality of temperature sensors 11, and the controller is respectively connected to each temperature sensor 11 and the electronic slide 23 by signal; each temperature sensor 11 is arranged on the outer wall surface of the transformer body 1, and each temperature sensor 11 is arranged at intervals from one end of the transformer body 1 facing the heat sink 2 to the end of the transformer body 1 away from the heat sink 2, so that each temperature sensor 11 can cooperate to detect the temperature data of each position of the transformer body 1; the controller is used to receive the transformer surface temperature data sent by each temperature sensor 11, and form a temperature difference table according to the surface temperature data of each transformer.

[0036] The controller controls the electronic slide 23 to move to the highest temperature area on the outer surface of the transformer body 1 for cooling according to the temperature difference table, and adjusts the position of the cooling fan 4 blowing toward the outer surface of the transformer body 1 in real time according to the real-time updated temperature difference table.

[0037] Specifically, the cooling fan 4 is provided with several wind speed gears, each wind speed gear corresponds to a different temperature range, and the increase of the wind speed of the cooling fan 4 is proportional to the temperature increase of the transformer body 1; the controller determines the wind speed gear of the cooling fan 4 according to the received temperature difference table, and the cooling fan 4 uses different wind speed gears according to different temperatures, which can avoid energy waste.

[0038] See also Figure 2 and Figure 4 , each cooling tube 33 is arranged at intervals, and a plurality of heat sinks 12 are arranged on the side of the transformer body 1 facing the support plate 21, and each heat sink 12 is arranged at intervals and parallel to each extension pipe section 331; each heat sink 12 is arranged symmetrically along the transformer body 1, and each heat sink 12 is located between the transformer body 1 and the extension pipe section 331, and one end of the heat sink 12 is connected to the cooling tube 33, and the other end is connected to the transformer body 1. The arrangement of the heat sink 12 makes the heat exchange between each cooling tube 33 and the transformer body 1 more frequent, ensuring the stability of the temperature of the transformer body 1.

[0039] A first wire groove 332 is provided on one side of each cooling tube 33 facing the transformer body 1; a plurality of second wire grooves 213 parallel to the first wire groove 332 are provided on both sides of the transformer body 1 facing the two support plates 21, and the second wire grooves 213 on both sides of the transformer body 1 are symmetrically arranged, and each pair of two second wire grooves 213 symmetrical along the transformer body 1 are directly opposite to the first wire groove 332 of the cooling tube 33; one end of a heat sink 12 is inserted into the second wire groove 213 on one side of the transformer body 1, and the other end is inserted into the first wire groove 322 of the cooling tube 33 directly opposite to the second wire groove 213, so that the cooling tube 33 and the transformer body 1 clamp the heat sink 12. The cooperation between the first wire groove 322 and the second wire groove 213 facilitates the replacement of the heat sink 12. Specifically, the heat sink 12 is rectangular, and a third wire groove 24 is provided on the side of the heat sink 2 facing the transformer body 1. The heat sink 12 is respectively inserted into the first wire groove 322, the second wire groove 213 and the third wire groove 24 to make the heat sink 12 more stable; the heat sink 12 is provided with heat dissipation holes.

[0040] The water inlet pipe 31 and the water outlet pipe 32 are heat-insulated pipes; each cooling pipe 33 is a copper pipe; the heat sink 12 is a copper sheet; a booster pump is provided on the water outlet pipe 32, and the booster pump is used to accelerate the flow rate of water flowing through the water inlet pipe 31, each cooling pipe 33 and the water outlet pipe 32 in sequence. The heat-insulated pipe is used to prevent the water flowing through the water inlet pipe 31 or the water outlet pipe 32 from being heated by external heat radiation, so that the warm water enters the cooling pipe 33 and affects the cooling effect of the transformer body 1.

[0041] See also Figure 1 and Figure 3The photovoltaic box transformer with high heat dissipation also includes a liquid nitrogen tank. Two nozzles 25 are arranged on the side of the heat dissipation seat 2 facing the transformer body 1. Each nozzle 25 is symmetrically arranged along the transformer body 1. One nozzle 25 is located between the transformer body 1 and an extension pipe section 331 of the cooling pipe 33, and the other nozzle 25 is located between the transformer body 1 and another extension pipe section 331 of the cooling pipe 33. The liquid nitrogen tank also includes nitrogen delivery pipes connected to each nozzle 25, so that liquid nitrogen passes through the nitrogen delivery pipe and each nozzle 25 and is sprayed between the transformer body 1 and each extension pipe section 331. The liquid nitrogen tank is used for emergency cooling, and is used when the heat dissipation fan 4 cooperates with the cooling pipe 33 for a certain period of time and still cannot cool the transformer body 1.

[0042] Specifically, the controller is used to control each nozzle 25 to spray liquid nitrogen. When the cooling fan 4 cools down the high-temperature area on the outer surface of the transformer body 1 for a predetermined time and there is no temperature change in the temperature graph of the outer surface of the transformer, the controller controls the nozzle 25 to spray liquid nitrogen.

[0043] The heat dissipating photovoltaic box-type transformer also includes a limit frame 5, which is arranged vertically on the heat dissipation seat 2, and one end of the limit frame 5 passes through the heat dissipation seat 2 for fixed connection with the ground; a fixing frame 6 is arranged on the side of the limit frame 5 facing the transformer body 1, and the fixing frame 6 includes a fixing rod 61 located on the side of the transformer body 1 away from the limit frame 5, and connecting rods 62 respectively connected to both ends of the fixing rod 61, and one end of each connecting rod 62 away from the fixing rod 61 is detachably connected to the limit frame 5.

[0044] Specifically, the limiting frame 5 passes through one end of the heat sink 2 to set a fixing screw hole 51, so that the limiting frame 5 and the ground are fixedly connected by expansion bolts, and then the transformer body 1 is fixed by the fixing frame 6, which can prevent the transformer body 1 from tipping over due to a slight earthquake.

[0045] The limiting frame 5 is provided with a plurality of screw holes 51 at intervals along the extension direction of the extension pipe section 331; a fixing plate 63 is fixedly arranged at one end of each connecting rod 62 away from the fixing rod 61, and the fixing plate 63 is provided with at least two through holes at intervals along the extension direction of the extension pipe section 331, and the distance between adjacent through holes is equal to the distance between adjacent screw holes 51, and the fixing plate 63 and the limiting frame 5 are fixedly connected by bolts passing through the screw holes 51 and the through holes. The fixing rod 61 and the connecting rod 62 are arranged around the transformer body 1 in coordination, and the screw holes 51 of the connecting rod 62 are connected with through holes at different heights, so that the fixing frame 6 can be used for the transformer body 1 of any height.

[0046] A limiting plate 26 is provided on the side of the heat sink 2 facing the transformer body 1. The limiting plate 26 is located on the side of the transformer body 1 away from the limiting frame 5. The limiting plate 26 has a heat dissipation hole. The limiting plate 26 can further strengthen the stability of the transformer body.

[0047] A limiting groove 27 is provided on the side of the heat sink 2 facing the transformer body 1, and the limiting groove 27 is used to place the transformer body 1; a heat dissipation hole is provided at the bottom of the limiting groove 27, and the heat dissipation hole is directly opposite to each cooling pipe 33. The limiting groove 27 further stabilizes the transformer body 1, and the heat dissipation hole in the limiting groove 27 can assist in cooling the transformer body 1.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A photovoltaic box transformer with high heat dissipation, characterized in that: The invention comprises a transformer body and a heat sink for placing the transformer body, the heat sink comprises a heat sink group and a heat sink fan, the heat sink group comprises a water inlet pipe and a water outlet pipe for respectively connecting to an external water source, and a plurality of cooling pipes connected between the water inlet pipe and the water outlet pipe, each of the cooling pipes is located on a side of the heat sink away from the transformer body, both ends of each cooling pipe are bent toward the transformer body and vertically extend through the heat sink, both ends of each cooling pipe form an extension pipe section, the two extension pipe sections are symmetrically arranged along the transformer body, and the extension pipe sections located on the same side of the transformer body are located in the same plane; a support plate perpendicular to the heat sink is arranged on a side of each extension pipe section away from the transformer body, each support plate is provided with a slideway parallel to each extension pipe section, an electronic slide seat that circulates and slides along the sliding path of the slideway is arranged in the slideway, and the heat sink fan is arranged on a side of the electronic slide seat facing the transformer body; The photovoltaic box transformer with high heat dissipation also includes a controller and a plurality of temperature sensors, and the controller is respectively connected to each temperature sensor and an electronic slide seat by signal; each temperature sensor is arranged on the outer wall surface of the transformer body, and each temperature sensor is arranged at intervals from one end of the transformer body facing the heat dissipation seat to one end of the transformer body away from the heat dissipation seat, so that each temperature sensor can cooperate to detect the temperature data of each position of the transformer body; the controller is used to receive the transformer surface temperature data sent by each temperature sensor, and form a temperature difference table according to each transformer surface temperature data; According to the temperature difference table, the controller controls the electronic slide to move to the area with the highest temperature on the outer surface of the transformer body to cool it down; The cooling tubes are arranged at intervals, and a plurality of heat sinks are arranged on the side of the transformer body facing the support plate, and the heat sinks are arranged at intervals and parallel to the extension tube sections; Each of the heat sinks is symmetrically arranged along the transformer body, and each of the heat sinks is located between the transformer body and the extended pipe section, one end of the heat sink is connected to the cooling pipe, and the other end is connected to the transformer body; The photovoltaic box transformer with high heat dissipation also includes a liquid nitrogen tank. Two nozzles are arranged on the side of the heat dissipation seat facing the transformer body. The nozzles are symmetrically arranged along the transformer body. One nozzle is located between the transformer body and an extended pipe section of the cooling pipe, and the other nozzle is located between the transformer body and another extended pipe section of the cooling pipe. The liquid nitrogen tank also includes nitrogen delivery pipes respectively connected to the nozzles, so that liquid nitrogen passes through the nitrogen delivery pipe and each nozzle and is sprayed between the transformer body and each extended pipe section.

2. A photovoltaic box transformer with high heat dissipation according to claim 1, characterized in that: A first wire groove is provided on a side of each cooling tube facing the transformer body; a plurality of second wire grooves parallel to the first wire groove are respectively provided on both sides of the transformer body facing the two support plates, the second wire grooves on both sides of the transformer body are symmetrically arranged, and each pair of two second wire grooves symmetrical along the transformer body are directly opposite to the first wire groove of a cooling tube; one end of a heat sink is inserted into the second wire groove on one side of the transformer body, and the other end is inserted into the first wire groove of the cooling tube facing the second wire groove, so that the cooling tube and the transformer body clamp the heat sink.

3. A photovoltaic box transformer with high heat dissipation according to claim 1, characterized in that: The water inlet pipe and the water outlet pipe are insulated pipes; each cooling pipe is a copper pipe; the heat sink is a copper sheet; a booster pump is provided on the water outlet pipe, and the booster pump is used to accelerate the flow rate of water flowing through the water inlet pipe, each cooling pipe and the water outlet pipe in sequence.

4. A photovoltaic box transformer with high heat dissipation according to any one of claims 1-3, characterized in that: The high-heat dissipation photovoltaic box-type transformer also includes a limit frame, which is arranged perpendicular to the heat sink, and one end of the limit frame passes through the heat sink for fixed connection with the ground; a fixing frame is arranged on the side of the limit frame facing the transformer body, and the fixing frame includes a fixing rod located on the side of the transformer body away from the limit frame, and connecting rods respectively connected to both ends of the fixing rod, and one end of each connecting rod away from the fixing rod is detachably connected to the limit frame.

5. A photovoltaic box transformer with high heat dissipation according to claim 4, characterized in that: The limit frame has a plurality of screw holes spaced apart along the extension direction of the extension pipe section; a fixing plate is fixedly arranged at one end of each connecting rod away from the fixing rod, and the fixing plate has at least two through holes spaced apart along the extension direction of the extension pipe section, and the distance between adjacent through holes is equal to the distance between adjacent screw holes, and the fixing plate and the limit frame are fixedly connected by bolts passing through the screw holes and the through holes.

6. A photovoltaic box transformer with high heat dissipation according to claim 4, characterized in that: A limiting plate is arranged on a side of the heat sink facing the transformer body, the limiting plate is located on a side of the transformer body away from the limiting frame, and a heat dissipation hole is provided on the limiting plate.

7. A photovoltaic box transformer with high heat dissipation according to any one of claims 1-3, characterized in that: A limiting groove is provided on one side of the heat sink facing the transformer body, and the limiting groove is used to place the transformer body; a heat dissipation hole is provided at the bottom of the limiting groove, and the heat dissipation hole is directly opposite to each of the cooling pipes.

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