A transformer fin and a transformer radiator

Abstract

The utility model discloses a transformer fin and transformer radiator, including heat dissipation shell and uniform temperature plate, and heat dissipation shell inside has the cavity, and heat dissipation shell is provided with liquid inlet and liquid outlet, the uniform temperature plate is set up in the inside of heat dissipation shell, and the cavity is divided into first cavity and second cavity, and first cavity is linked together with liquid inlet and liquid outlet, and second cavity is linked together with liquid inlet and liquid outlet, among them, first cavity and second cavity are filled with the composite phase change material, the transformer fin provided by the utility model can utilize the uniform temperature plate in the inside to transmit the local high temperature more quickly to the composite phase change material on each position when the transformer high load working condition, to store up the heat temporarily through the composite phase change material of phase change, thereby realizes high -efficient heat buffer, control temperature fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer heat sink and a transformer radiator. Background Technology

[0002] Transformer radiators typically circulate the heat transfer oil from the transformer into the radiator's fins for cooling before recirculating it back into the transformer. Traditional radiators often use metal fins with internal channels for the heat transfer oil, utilizing the metal's thermal conductivity to exchange heat with the outside air. However, traditional radiators have low thermal buffering capacity and cannot smooth out temperature fluctuations. For example, during sudden high loads due to operating conditions, the metal material alone cannot quickly absorb the large amount of heat generated, causing a rapid rise in transformer temperature. This can lead to insulation aging, winding deformation, core damage, or even equipment failure, affecting the transformer's operation. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a transformer heat sink that, under high load conditions, can utilize an internal heat spreader to rapidly distribute localized high temperatures to composite phase change materials at various locations. This allows the composite phase change materials, which undergo phase change, to temporarily store heat, thereby achieving efficient thermal buffering and controlling temperature fluctuations.

[0004] This utility model also proposes a transformer radiator having the above-mentioned transformer heat sink.

[0005] A transformer heat sink according to an embodiment of the present invention includes a heat dissipation shell and a heat spreader plate. The heat dissipation shell has a cavity inside and has a liquid inlet and a liquid outlet. The heat spreader plate is disposed inside the heat dissipation shell and divides the cavity into a first cavity and a second cavity. The first cavity is connected to the liquid inlet and the liquid outlet, and the second cavity is connected to the liquid inlet and the liquid outlet. Both the first cavity and the second cavity are filled with a composite phase change material.

[0006] According to some embodiments of the present invention, the heat spreader plate has a plurality of protruding ribs protruding from the surface of the first cavity. All the protruding ribs are arranged in a honeycomb pattern to form a plurality of honeycomb grooves. The composite phase change material is filled in the honeycomb grooves. There is a flow gap between the protruding ribs and the opposite sidewall of the first cavity so that all the honeycomb grooves are interconnected. A support portion is provided at the position where two adjacent protruding ribs are connected. The support portion is connected to the sidewall of the opposite cavity.

[0007] According to some embodiments of the present invention, the heat spreader plate has a plurality of protruding ribs protruding from the surface of the second cavity. All the protruding ribs are arranged in a honeycomb mesh to form a plurality of honeycomb grooves. The composite phase change material is filled in the honeycomb grooves. There is a flow gap between the protruding ribs and the opposite sidewall of the second cavity so that all the honeycomb grooves are interconnected. A support portion is provided at the position where two adjacent protruding ribs are connected. The support portion is connected to the sidewall of the opposite cavity.

[0008] According to some embodiments of the present invention, the heat spreader includes a metal shell and a capillary structure disposed in the inner cavity of the metal shell, and the inner cavity of the metal shell is filled with a working fluid.

[0009] The transformer radiator according to a second aspect embodiment of the present invention includes the above-described transformer heat sink.

[0010] According to some embodiments of the present invention, the transformer radiator further includes a first oil pipe and a second oil pipe, the second oil pipe being arranged side by side with the first oil pipe; wherein, at least two transformer heat sinks are provided, all of the transformer heat sinks being arranged at intervals between the first oil pipe and the second oil pipe along the axial direction of the first oil pipe, the first oil pipe being connected to the liquid inlet of all the transformer heat sinks, and the second oil pipe being connected to the liquid outlet of all the transformer heat sinks.

[0011] According to some embodiments of the present invention, a first mounting groove is provided at one end of the heat dissipation shell, the liquid inlet is opened in the bottom wall of the first mounting groove, the first oil pipe is inserted into the first mounting groove, and the outer peripheral surface of the first oil pipe is attached and connected to the bottom wall of the first mounting groove.

[0012] According to some embodiments of the present invention, a second mounting groove is provided at the other end of the heat dissipation shell, the liquid outlet is opened on the bottom wall of the second mounting groove, the second oil pipe is inserted into the second mounting groove, and the outer peripheral surface of the second oil pipe is attached to and connected to the bottom wall of the second mounting groove.

[0013] According to some embodiments of this utility model, at least two transformer heat sinks are arranged side by side, wherein the liquid inlet is connected to a first pipe connector and the liquid outlet is connected to a second pipe connector. The first pipe connector has a first joint and a second joint that are opposite to each other, and the second pipe connector has a third joint and a fourth joint that are opposite to each other. Between two adjacent transformer heat sinks, the first joint of one first pipe connector is connected to the second joint of the other first pipe connector, and the third joint of one second pipe connector is connected to the fourth joint of the other second pipe connector.

[0014] According to some embodiments of the present invention, the first connector is fitted with a tightening nut, the second connector is provided with an external thread for screwing into the tightening nut, the third connector is fitted with a tightening nut, and the fourth connector is provided with an external thread for screwing into the tightening nut.

[0015] The transformer radiator according to the embodiments of the present invention has at least the following beneficial effects: When the transformer is under high load, the transformer radiator provided by the present invention can use the internal heat spreader to distribute the local high temperature to the composite phase change material at various locations more quickly, so that the composite phase change material at various locations can undergo phase change more synchronously, so as to absorb more heat more effectively and faster. The composite phase change material that undergoes phase change temporarily stores a large amount of heat, thereby achieving efficient heat buffering and controlling temperature fluctuations.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a vertical cross-sectional view of the transformer heat sink according to the first embodiment of the present invention;

[0019] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0020] Figure 3 This is a cross-sectional view of the transformer heat sink according to an embodiment of the present invention;

[0021] Figure 4 For having Figure 1 The diagram shown is a schematic of a transformer heat sink with transformer heat sink fins;

[0022] Figure 5 This is a cross-sectional view of the transformer heat sink according to the second embodiment of the present invention;

[0023] Figure 6 For having Figure 5 A schematic diagram of a transformer heat sink is shown.

[0024] Figure label:

[0025] Heat dissipation shell 100, cavity 110, first cavity 111, second cavity 112, liquid inlet 120, liquid outlet 130, first mounting groove 140, second mounting groove 150, heat spreader 200, rib 210, support part 220, honeycomb groove 230, composite phase change material 300, first pipe connector 410, first joint 411, second joint 412, second pipe connector 420, third joint 421, fourth joint 422, tightening nut 430, first oil pipe 510, second oil pipe 520. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] Reference Figure 1 and Figure 2According to an embodiment of the present invention, a transformer radiator includes a heat dissipation shell 100 and a heat spreader 200. The heat dissipation shell 100 has a cavity 110 inside and has an inlet 120 and an outlet 130. The heat spreader 200 is disposed inside the heat dissipation shell 100 and divides the cavity 110 into a first cavity 111 and a second cavity 112. The first cavity 111 is connected to the inlet 120 and the outlet 130, and the second cavity 112 is connected to the inlet 120 and the outlet 130. Both the first cavity 111 and the second cavity 112 are filled with a composite phase change material 300.

[0031] Because the first cavity 111 and the second cavity 112 are filled with composite phase change material 300, when the heat transfer oil flows through the first cavity 111 and the second cavity 112, it is blocked by the composite phase change material 300, and the flow rate of the heat transfer oil inevitably decreases. In this case, there will be a situation where the composite phase change material 300 absorbs heat and undergoes phase change in some places but does not absorb heat and undergo phase change in others. The heat absorption and deformation of the composite phase change material 300 at different locations are not synchronized, and it cannot quickly absorb more heat. To address this, this invention adds a heat spreader 200 to quickly transfer and distribute heat to various locations, thereby compensating for or even enhancing the reduced heat transfer efficiency caused by filling with composite phase change material 300.

[0032] With the above configuration, the transformer heat sink provided by this utility model can utilize the internal heat spreader 200 to more quickly transfer and disperse the local high temperature to the composite phase change material 300 at various locations when the transformer is under high load. This allows the composite phase change material 300 at various locations to undergo phase change more synchronously, thereby absorbing more heat more effectively and quickly. In this way, the composite phase change material 300 that undergoes phase change temporarily stores a large amount of heat, breaking through the limitations of metal thermal conductivity, achieving efficient thermal buffering and dynamic control of temperature fluctuations, reducing the risk of extreme operating conditions, and ensuring the safe operation of equipment. In addition, the high thermal conductivity of the composite phase change material 300 itself and the high thermal conductivity of the heat spreader 200 reduce the reliance on forced air cooling, and efficient heat dissipation can be achieved under natural convection conditions.

[0033] Reference Figures 1 to 3 According to some embodiments of this utility model, the heat spreader 200 has multiple protruding ribs 210 on its surface facing the first cavity 111. All the ribs 210 are arranged in a honeycomb mesh to form multiple honeycomb grooves 230. The composite phase change material 300 is filled in the honeycomb grooves 230. There are flow gaps between the ribs 210 and the opposite sidewalls of the first cavity 111 so that all the honeycomb grooves 230 are interconnected. With the above arrangement, a mesh flow channel can be formed in the first cavity 111 so that the heat transfer oil can flow more evenly through the first cavity 111, improving the heat dissipation uniformity and ensuring that more of the composite phase change material 300 participates in the work.

[0034] Reference Figure 2 and Figure 3 In this configuration, a support portion 220 is provided at the position where two adjacent ribs 210 are connected. The support portion 220 is connected to the side wall of the opposite cavity 110. Thus, the heat spreader 200 and the side wall of the first cavity 111 form mutual support, improving the overall strength of the transformer heat sink. In addition, the heat spreader 200 can also transfer heat through the contact between the support portion 220 and the side wall of the first cavity 111.

[0035] Reference Figure 2 and Figure 3 According to some embodiments of the present invention, the heat spreader 200 has a plurality of protruding ribs 210 protruding from the surface of the second cavity 112. All the ribs 210 are arranged in a honeycomb mesh to form a plurality of honeycomb grooves 230. The composite phase change material 300 is filled in the honeycomb grooves 230. There is a flow gap between the ribs 210 and the side wall of the opposite second cavity 112 so that all the honeycomb grooves 230 are interconnected. Thus, a mesh flow channel can be formed in the second cavity 112 so that the heat transfer oil can flow more evenly through the second cavity 112, improve the heat dissipation uniformity, and ensure that more composite phase change material 300 participates in the work. A support portion 220 is provided at the position where two adjacent ribs 210 are connected. The support portion 220 is connected to the side wall of the opposite cavity 110. Thus, the heat spreader 200 and the side wall of the second cavity 112 support each other, improving the overall strength of the transformer heat sink. In addition, the heat spreader 200 can also transfer heat through the contact between the support portion 220 and the side wall of the second cavity 112.

[0036] In the specific implementation process, the composite phase change material 300 can be composed of paraffin and expanded graphite. Of course, other materials can also be used. For example, the composite phase change material 300 can be composed of phase change substrates such as polyols or GeTe alloys and media materials such as graphene and carbon nanotubes.

[0037] The composite phase change material 300 can be made into dispersed particles, or into a porous object similar to a sponge, or a 3D mesh. When the composite phase change material 300 is made into particles, the size of each particle should be larger than the distance between the rib 210 and the sidewall of the corresponding heat dissipation shell 100. This allows the rib 210 to confine the composite phase change material 300 within the corresponding honeycomb grooves 230, preventing the composite phase change material 300 from being carried away by the heat transfer oil or from accumulating in one place. Simultaneously, the size of each particle is smaller than the distance between the bottom wall of the honeycomb groove 230 and the inner wall of the corresponding heat dissipation shell 100, allowing the composite phase change material 300 to expand, deform, and absorb heat.

[0038] According to some embodiments of this utility model, the heat spreader 200 includes a metal shell and a capillary structure disposed within the inner cavity of the metal shell, and the inner cavity of the metal shell is filled with a working fluid, which can be water or other media. The heat spreader 200 is a common heat-conducting element in mobile phones and other technical fields; its specific structure will not be described in detail here.

[0039] Reference Figure 4 and Figure 6 The transformer radiator according to a second aspect embodiment of the present invention includes the aforementioned transformer heat sink. By employing the aforementioned heat sink, the transformer radiator can have better heat buffering capacity, thereby better controlling transformer temperature fluctuations.

[0040] Reference Figure 4 According to some embodiments of this utility model, the transformer radiator further includes a first oil pipe 510 and a second oil pipe 520, with the second oil pipe 520 arranged side-by-side with the first oil pipe 510. At least two transformer heat sinks are provided, and all the transformer heat sinks are spaced apart along the axial direction of the first oil pipe 510 between the first oil pipe 510 and the second oil pipe 520. The first oil pipe 510 is connected to the inlet 120 of all the transformer heat sinks, and the second oil pipe 520 is connected to the outlet 130 of all the transformer heat sinks. The transformer radiator is connected to the interior of the transformer body through the first oil pipe 510 and the second oil pipe 520. Heat transfer oil can enter the heat sink from the first oil pipe 510 and then flow back into the transformer body from the second oil pipe 520.

[0041] Reference Figure 1 , Figure 3 and Figure 4 According to some embodiments of the present invention, a first mounting groove 140 is provided at one end of the heat dissipation shell 100, an inlet 120 is opened on the bottom wall of the first mounting groove 140, a first oil pipe 510 is inserted into the first mounting groove 140, and the outer peripheral surface of the first oil pipe 510 is attached to the bottom wall of the first mounting groove 140 and connected by welding, pasting or other means. With the above arrangement, the first oil pipe 510 can be easily connected to each heat sink.

[0042] Reference Figure 1 , Figure 3 and Figure 4 According to some embodiments of this utility model, a second mounting groove 150 is provided at the other end of the heat dissipation housing 100, an outlet 130 is opened in the bottom wall of the second mounting groove 150, and a second oil pipe 520 is inserted into the second mounting groove 150, with the outer peripheral surface of the second oil pipe 520 abutting and connected to the bottom wall of the second mounting groove 150. With the above arrangement, the second oil pipe 520 can be easily connected to each heat sink fin.

[0043] The bottom wall of the first mounting groove 140 is provided with a first annular sealing groove around the liquid inlet 120, and the first sealing groove is filled with sealant. The bottom wall of the second mounting groove 150 is provided with a second annular sealing groove around the liquid outlet 130, and the second sealing groove is filled with sealant. This ensures sealing and reduces oil leakage.

[0044] Reference Figure 5 and Figure 6 According to some embodiments of this utility model, at least two transformer heat sinks are arranged side by side. The inlet 120 is connected to a first pipe connector 410, and the outlet 130 is connected to a second pipe connector 420. The first pipe connector 410 has a first joint 411 and a second joint 412 that are opposite to each other. The second pipe connector 420 has a third joint 421 and a fourth joint 422 that are opposite to each other. Between two adjacent transformer heat sinks, the first joint 411 of one first pipe connector 410 is connected to the second joint 412 of the other first pipe connector 410, and the third joint 421 of one second pipe connector 420 is connected to the fourth joint 422 of the other second pipe connector 420. Furthermore, on the two outermost heat sinks, the first joint 411 and the second joint 412 on one heat sink are connected to the first oil pipe 510 and the second oil pipe 520, respectively, while the second joint 412 and the fourth joint 422 on the other heat sink are capped. With the above configuration, the number of heat sinks in the transformer radiator can be flexibly increased or decreased as needed, and each heat sink is easy to install and remove.

[0045] Reference Figure 5 and Figure 6 According to some embodiments of this utility model, a first connector 411 is fitted with a tightening nut 430, a second connector 412 is provided with external threads for screwing into the tightening nut 430, a third connector 421 is fitted with a tightening nut 430, and a fourth connector 422 is provided with external threads for screwing into the tightening nut 430. This arrangement ensures a secure connection between adjacent heat sinks. To ensure sealing, a sealing gasket can be provided between the first connector 411 and the second connector 412.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A transformer fin, characterized by, include: A heat dissipation housing (100) has a cavity (110) inside, and the heat dissipation housing (100) has a liquid inlet (120) and a liquid outlet (130); A heat spreader (200) is disposed inside the heat dissipation shell (100) and divides the cavity (110) into a first cavity (111) and a second cavity (112). The first cavity (111) is connected to the liquid inlet (120) and the liquid outlet (130), and the second cavity (112) is connected to the liquid inlet (120) and the liquid outlet (130). Both the first cavity (111) and the second cavity (112) are filled with composite phase change material (300).

2. A transformer fin according to claim 1, wherein The heat spreader (200) has a plurality of ribs (210) protruding from the surface of the first cavity (111). All the ribs (210) are arranged in a honeycomb pattern to form a plurality of honeycomb grooves (230). The composite phase change material (300) is filled in the honeycomb grooves (230). There is a flow gap between the ribs (210) and the sidewall of the opposite first cavity (111) so that all the honeycomb grooves (230) are interconnected. A support part (220) is provided at the position where two adjacent ribs (210) are connected. The support part (220) is connected to the sidewall of the opposite cavity (110).

3. A transformer fin according to claim 1, wherein The heat spreader (200) has a plurality of ribs (210) protruding from the surface of the second cavity (112). All the ribs (210) are arranged in a honeycomb grid to form a plurality of honeycomb grooves (230). The composite phase change material (300) is filled in the honeycomb grooves (230). There is a flow gap between the ribs (210) and the sidewall of the opposite second cavity (112) so that all the honeycomb grooves (230) are interconnected. A support part (220) is provided at the position where two adjacent ribs (210) are connected. The support part (220) is connected to the sidewall of the opposite cavity (110).

4. A transformer fin according to claim 1, wherein The heat spreader (200) includes a metal shell and a capillary structure disposed in the inner cavity of the metal shell, and the inner cavity of the metal shell is filled with working fluid.

5. A transformer radiator, characterized in that, Includes the transformer heat sink as described in any one of claims 1 to 4.

6. A transformer radiator according to claim 5, characterised in that Also includes: First oil pipe (510); The second oil pipe (520) is arranged side by side with the first oil pipe (510); The transformer heat sink is provided with at least two, and all the transformer heat sinks are arranged at intervals between the first oil pipe (510) and the second oil pipe (520) along the axial direction of the first oil pipe (510). The first oil pipe (510) is connected to the liquid inlet (120) of all the transformer heat sinks, and the second oil pipe (520) is connected to the liquid outlet (130) of all the transformer heat sinks.

7. A transformer radiator according to claim 6, characterized in that, One end of the heat dissipation shell (100) is provided with a first mounting groove (140), the liquid inlet (120) is opened on the bottom wall of the first mounting groove (140), the first oil pipe (510) is inserted into the first mounting groove (140), and the outer peripheral surface of the first oil pipe (510) is attached to and connected to the bottom wall of the first mounting groove (140).

8. A transformer radiator according to claim 7, characterized in that, The other end of the heat dissipation shell (100) is provided with a second mounting groove (150), the liquid outlet (130) is opened on the bottom wall of the second mounting groove (150), the second oil pipe (520) is inserted into the second mounting groove (150), and the outer peripheral surface of the second oil pipe (520) is attached to and connected to the bottom wall of the second mounting groove (150).

9. A transformer radiator according to claim 6, characterized in that At least two transformer heat sinks are arranged side by side. The liquid inlet (120) is connected to a first pipe connector (410), and the liquid outlet (130) is connected to a second pipe connector (420). The first pipe connector (410) has a first joint (411) and a second joint (412) that are opposite to each other. The second pipe connector (420) has a third joint (421) and a fourth joint (422) that are opposite to each other. Between two adjacent transformer heat sinks, the first joint (411) of one first pipe connector (410) is connected to the second joint (412) of the other first pipe connector (410), and the third joint (421) of one second pipe connector (420) is connected to the fourth joint (422) of the other second pipe connector (420).

10. A transformer radiator according to claim 9, characterised in that The first connector (411) is fitted with a tightening nut (430), the second connector (412) is provided with an external thread for screwing into the tightening nut (430), the third connector (421) is fitted with a tightening nut (430), and the fourth connector (422) is provided with an external thread for screwing into the tightening nut (430).

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