Double-circulation heat dissipation structure of high-power automobile rectifier bridge

Abstract

The utility model discloses a high-power automobile rectifier bridge double-circulation heat dissipation structure, which comprises a first heat dissipation structure and a second heat dissipation structure, and is characterized in that a first polar plate and a second polar plate of a rectifier bridge are oppositely erected; the two first heat dissipation structures are respectively embedded in the outer rings of the first polar plate and the second polar plate; the two second heat dissipation structures are respectively embedded in the inner rings of the first polar plate and the second polar plate; each first heat dissipation structure comprises heat dissipation fins and a connecting pipeline, the multiple heat dissipation fins are arranged on the outer ring of the first polar plate or the second polar plate at equal intervals, and cavities are formed in the heat dissipation fins; the plurality of radiating fins are communicated through a connecting pipeline; each second heat dissipation structure comprises a cavity and a coolant, and the cavity is arranged along the inner ring of the first polar plate or the second polar plate; a coolant is disposed within the cavity. Through the first heat dissipation structure and the second heat dissipation structure, uniform and efficient heat dissipation can be carried out on the rectifier bridge, and the heat dissipation requirement of the high-power automobile rectifier bridge is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile rectifier bridge, especially relates to a high -power automobile rectifier bridge double -cycle heat dissipation structure. BACKGROUND

[0002] With the continuous development of automobile industry, the application of automobile electronic equipment is more and more extensive, and the performance requirement of automobile rectifier bridge is increasingly improved, and the automobile rectifier bridge is the key component in the automobile electrical system, and its main function is to convert alternating current into direct current, and provide stable direct current power for the charging of automobile electronic equipment and battery.

[0003] In the related art, in order to improve the heat dissipation efficiency of the rectifier bridge, a plurality of heat dissipation fins are arranged on the polar plate, and the heat dissipation fins are used to accelerate heat exchange to achieve the effect of dissipating heat from the rectifier bridge, for example, the application number CN202321415525.2 of an automobile generator rectifier bridge heat dissipation plate, a plurality of heat dissipation fins are arranged on the side of the heat dissipation plate, one end of each heat dissipation fin close to the heat dissipation plate is embedded in the heat dissipation plate, one end of each heat dissipation fin away from the heat dissipation plate extends to the side of the heat dissipation plate, the inside of each heat dissipation fin is a hollow structure, the end of the heat dissipation fin away from the heat dissipation plate is an open end, the bottom of the heat dissipation plate is recessed inward to form a cavity, to achieve the effect of rapid heat dissipation.

[0004] However, when the above-mentioned patent is used on a high-power automobile rectifier bridge, the heat generated by the high-power rectifier bridge is several times that of ordinary power, and it is difficult to dissipate the heat to the surrounding environment in a short time by relying on limited heat dissipation fins, resulting in heat accumulation and temperature rise. Moreover, when the local temperature of the rectifier bridge is too high, the above-mentioned multiple independent heat dissipation fins cannot quickly transfer the local high-temperature heat to the edge heat dissipation fins, resulting in uneven heat dissipation, which reduces the performance of the high-power rectifier bridge, and even damages it. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve at least one of the technical problems in the above-mentioned technology to some extent.

[0006] To achieve the above object, the utility model discloses a first aspect proposes a kind of high-power automobile rectifier bridge double-cycle heat dissipation structure, comprising: first heat dissipation structure and second heat dissipation structure, wherein, the first pole plate and the second pole plate of rectifier bridge are oppositely erected;Two described first heat dissipation structures are respectively embedded in the outer ring of the first pole plate and the second pole plate;Two described second heat dissipation structures are respectively embedded in the inner ring of the first pole plate and the second pole plate;Each described first heat dissipation structure includes heat dissipation fin and connecting pipeline, wherein, multiple described heat dissipation fins are equidistantly arranged on the outer ring of the first pole plate or the second pole plate, and the heat dissipation fin is built-in cavity;Multiple described heat dissipation fins are communicated by the connecting pipeline;Each described second heat dissipation structure includes cavity and coolant, wherein, the cavity is along the inner ring of the first pole plate or the second pole plate and is arranged;The coolant is arranged in the cavity.

[0007] In addition, according to the high-power automobile rectifier bridge double-cycle heat dissipation structure proposed in the above utility model can also have the following additional technical features:

[0008] As a further description of the above technical solution: the heat dissipation fin is provided with a first embedding groove, and the outer ring of the first pole plate or the second pole plate is embedded in the first embedding groove, and a connecting hole is formed in the heat dissipation fin, and the connecting pipeline is communicated with the connecting hole.

[0009] As a further description of the above technical solution: the cavity is provided with a second embedding groove, and the inner ring of the first pole plate or the second pole plate is embedded in the second embedding groove.

[0010] As a further description of the above technical solution: the connecting pipeline is a flexible high-temperature-resistant pipeline, and a spiral reinforcing rib is arranged inside the connecting pipeline.

[0011] As a further description of the above technical solution: the coolant is a glycol solution.

[0012] As a further description of the above technical solution: the inner wall of the first embedding groove is provided with a heat-conducting silica gel layer, and the thickness of the heat-conducting silica gel layer is between 0.1-0.3 millimeters.

[0013] As a further description of the above technical solution: the surface of the heat dissipation fin is coated with an alumina or titanium dioxide heat dissipation coating, and the thickness of the coating is between 10-50 nanometers.

[0014] As a further description of the above technical solution: the heat dissipation fins on the first pole plate and the second pole plate are staggered.

[0015] The high-power automobile rectifier bridge double-circulation heat dissipation structure has the advantages that the first heat dissipation structure is arranged at the outer circle of the pole plate, and the heat is rapidly transferred and diffused through the cooperation of the heat dissipation fins and the connecting pipeline, so that the local overheating is avoided, and uniform heat dissipation is realized; the second heat dissipation structure is arranged at the inner circle of the pole plate, and the heat generated by the inner circle of the pole plate is directly absorbed through the combination of the cavity and the coolant, so that the rectifier bridge is heat-dissipated from the inner and outer directions, the heat dissipation effect is greatly improved, and the heat dissipation demand of the high-power automobile rectifier bridge is met.

[0016] Additional aspects and advantages of the present application will be set forth in part in the following description, and in part will become apparent to those skilled in the art upon examination of the following description, or can be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, taken in conjunction with the accompanying drawings, in which:

[0018] Fig. 1 is a structure schematic view of a high-power automobile rectifier bridge double-circulation heat dissipation structure according to an embodiment of the present application;

[0019] Fig. 2 is a structure schematic view of a high-power automobile rectifier bridge double-circulation heat dissipation structure according to another embodiment of the present application;

[0020] Fig. 3 is an internal structure schematic view of a heat dissipation fin according to an embodiment of the present application;

[0021] Fig. 4 is an internal structure schematic view of a second heat dissipation structure according to an embodiment of the present application;

[0022] As shown in the drawings:

[0023] 100, first pole plate; 200, second pole plate; 300, first heat dissipation structure; 310, heat dissipation fin; 311, first embedding groove; 312, connecting hole; 320, connecting pipeline; 400, second heat dissipation structure; 410, cavity; 411, second embedding groove; 420, coolant. DETAILED DESCRIPTION

[0024] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0025] The high-power automobile rectifier bridge double-circulation heat dissipation structure of the embodiment of the utility model is described below with reference to the drawings.

[0026] As Figs. 1 to 4 shown, the high-power automobile rectifier bridge double-circulation heat dissipation structure of the embodiment of the utility model can include a first heat dissipation structure 300 and a second heat dissipation structure 400.

[0027] Among them, the first pole plate 100 and the second pole plate 200 of the rectifier bridge are oppositely erected, two first heat dissipation structures 300 are respectively embedded in the outer rings of the first pole plate 100 and the second pole plate 200, and two second heat dissipation structures 400 are respectively embedded in the inner rings of the first pole plate 100 and the second pole plate 200.

[0028] Each first heat dissipation structure 300 includes a heat dissipation fin 310 and a connecting pipe 320.

[0029] Among them, a plurality of heat dissipation fins 310 are equidistantly arranged on the outer rings of the first pole plate 100 or the second pole plate 200, and the heat dissipation fins 310 are internally provided with cavities, and the plurality of heat dissipation fins 310 are communicated through the connecting pipe 320.

[0030] Each second heat dissipation structure 400 includes a cavity 410 and a coolant 420.

[0031] Among them, the cavity 410 is arranged along the inner ring of the first pole plate 100 or the second pole plate 200, and the coolant 420 is arranged in the cavity 410.

[0032] Specifically, when the rectifier bridge generates heat during work, the heat is conducted from the first pole plate 100 and the second pole plate 200 to the heat dissipation fin 310, because the heat dissipation fin 310 has an internal cavity, the heat is transmitted in the cavity, and each heat dissipation fin 310 is communicated through the connecting pipe 320, so that the heat can quickly spread in the heat dissipation fin 310 of the whole outer ring, and the heat is efficiently transmitted and diffused in the first heat dissipation structure 300 by using the principles of heat conduction and heat convection, the surface of the heat dissipation fin 310 is in contact with the air, and when the heat is transmitted and diffused in the fin, the heat is exchanged with the air through the fin surface.

[0033] At the same time, when the inner ring of the first pole plate 100 and the second pole plate 200 generates heat, the heat is transmitted to the internal coolant 420 through the cavity 410, the coolant 420 directly absorbs the heat, the coolant 420 has a relatively high specific heat capacity, and can increase the temperature relatively small while absorbing a large amount of heat, this direct heat absorption mode can quickly reduce the temperature of the inner ring of the pole plate, avoid the accumulation of heat in the inner ring, so as to guarantee the normal working temperature of the rectifier bridge.

[0034] The first heat dissipation structure 300 rapidly spreads heat from the outer ring, and the second heat dissipation structure 400 directly absorbs heat from the inner ring, and the two work in cooperation, the outer ring heat dissipation structure can firstly absorb and spread most of the heat, and the inner ring heat dissipation structure can further absorb the remaining heat, so that uniform heat dissipation of the whole rectifier bridge is realized, the principle of the inner and outer ring cooperative heat dissipation makes full use of the advantages of the two heat dissipation structures, overcomes the limitation of the traditional single heat dissipation mode, and improves the heat dissipation effect and heat dissipation uniformity of the whole rectifier bridge.

[0035] In an embodiment of the utility model, first embedded groove 311 is arranged on heat dissipation fin 310, and the outer ring of first polar plate 100 or second polar plate 200 is embedded in first embedded groove 311, and connecting hole 312 is formed in heat dissipation fin 310, and connecting pipeline 320 is communicated with connecting hole 312.

[0036] It should be noted that the design of first embedded groove 311 enables the outer ring of first polar plate 100 or second polar plate 200 to be embedded therein, realizing the close connection between heat dissipation fin 310 and the polar plate, which can ensure that heat is efficiently conducted from the polar plate to heat dissipation fin 310, avoiding thermal resistance caused by loose connection, thereby improving the heat dissipation efficiency of the whole heat dissipation structure.

[0037] To further improve the heat absorption capacity of heat dissipation fin 310, a heat-conducting silica gel layer is arranged on the inner wall of first embedded groove 311, and the thickness of the heat-conducting silica gel layer is between 0.1-0.3 millimeters.

[0038] It should be noted that the heat-conducting silica gel has good heat-conducting performance, which can fill the small gap between heat dissipation fin 310 and the polar plate, further reducing thermal resistance, so that heat can be more smoothly conducted from the polar plate to heat dissipation fin 310. According to the principle of heat conduction, the smaller the thermal resistance, the higher the efficiency of heat conduction. Therefore, the arrangement of the heat-conducting silica gel layer can optimize the heat conduction process and improve the heat absorption capacity of heat dissipation fin 310.

[0039] In addition, the surface of heat dissipation fin 310 is coated with an alumina or titanium dioxide heat dissipation coating, and the thickness of the coating is between 10-50 nanometers, which can improve the radiation heat dissipation capacity of heat dissipation fin 310.

[0040] In the heat dissipation process, in addition to heat conduction and heat convection, radiation heat dissipation is also an important heat dissipation method. The presence of the coating enables heat dissipation fin 310 to more effectively dissipate heat to the surrounding environment through radiation, thereby improving the overall heat dissipation efficiency.

[0041] The aluminum oxide or titanium dioxide has certain oxidation resistance and corrosion resistance, in the automobile operating environment, the heat dissipation fins 310 can contact various chemicals and humid air, the coating can protect the heat dissipation fins 310 from being oxidized and corroded, prolong the service life, and reduce the maintenance cost.

[0042] In an embodiment of the present application, the connecting pipeline 320 is a flexible high-temperature-resistant pipeline, and a spiral reinforcing rib is arranged in the connecting pipeline 320 to enhance the compression resistance and prevent deformation of the pipeline, so that the heat transfer uniformity between the heat dissipation fins 310 is maintained under different working temperature and pressure conditions.

[0043] In an embodiment of the present application, the cavity 410 is provided with a second embedding groove 411, and the inner ring of the first polar plate 100 or the second polar plate 200 is embedded in the second embedding groove 411.

[0044] The inner ring of the first polar plate 100 or the second polar plate 200 is in close contact with the cavity 410, which reduces the existence of air gap and other bad heat conduction media, according to the heat conduction principle, good heat conduction requires close contact and appropriate conduction medium, the second embedding groove 411 optimizes the heat conduction path, so that heat can be more smoothly conducted from the polar plate to the cavity 410 where the coolant 420 is located.

[0045] In addition, the coolant 420 is a glycol solution.

[0046] It should be noted that the freezing point and boiling point of the glycol solution are matched with the working environment temperature of the automobile rectifier bridge, the low freezing point ensures that it will not freeze in cold environment, and the high boiling point ensures that it will not vaporize in high temperature environment, so that it can work normally under different temperature conditions, and provide continuous cooling effect for the rectifier bridge.

[0047] In an embodiment of the present application, the heat dissipation fins 310 on the first polar plate 100 and the second polar plate 200 are staggered.

[0048] It should be noted that when the heat dissipation fins 310 are staggered, the excessive accumulation of heat in the local area can be effectively avoided, in the traditional non-staggered arrangement mode, the air flow between adjacent fins will have a relative "dead angle", which will cause the heat in some areas to be dissipated slowly, and a local overheating phenomenon will occur, and the staggered arrangement makes the air flow path more uniform when flowing through the heat dissipation fins 310, and the heat can be more evenly distributed to each area, so that the temperature distribution of the entire rectifier bridge is more balanced, and the adverse effects of local high temperature on the performance of the rectifier bridge are avoided.

[0049] In addition, the heat dissipation fins 310 on different pole plates are staggered, which can form a synergistic heat dissipation effect. The heat dissipated from the fins on the first pole plate 100 can be better taken away by the air around the heat dissipation fins 310 on the second pole plate 200, and vice versa. In this way, compared with the case of separate heat dissipation, the heat dissipation coverage can be further expanded, and the heat dissipation capacity of the whole double-circulation heat dissipation structure can be improved, so that the large amount of heat generated by the high-power automobile rectifier bridge can be better dealt with.

[0050] In summary, according to the high-power automobile rectifier bridge double-circulation heat dissipation structure, the first heat dissipation structure 300 and the second heat dissipation structure 400 form a double-circulation heat dissipation structure. The first heat dissipation structure 300 is arranged at the outer circle of the pole plate, and the heat is quickly transferred and diffused through the cooperation of the heat dissipation fins 310 and the connecting pipeline 320, so that local overheating can be avoided, and uniform heat dissipation can be achieved. The second heat dissipation structure 400 is arranged at the inner circle of the pole plate, and the heat generated by the inner circle of the pole plate is directly absorbed through the combination of the cavity 410 and the coolant 420. This double-circulation heat dissipation method can dissipate heat from the inside and outside of the rectifier bridge, greatly improving the heat dissipation effect and meeting the heat dissipation needs of the high-power automobile rectifier bridge.

[0051] In the description of the present specification, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0052] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and modified by those skilled in the art without contradiction.

[0053] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A high-power automobile rectifier bridge double-circulation heat dissipation structure, characterized in that, The utility model relates to a heat dissipation structure of rectifier bridge, including: First heat dissipation structure (300) and second heat dissipation structure (400), wherein, The first pole plate (100) and the second pole plate (200) of rectifier bridge are opposite to be erected; Two first heat dissipation structures (300) are respectively embedded in the outer ring of the first pole plate (100) and the second pole plate (200); Two second heat dissipation structures (400) are respectively embedded in the inner ring of the first pole plate (100) and the second pole plate (200); Each first heat dissipation structure (300) includes heat dissipation fin (310) and connecting pipeline (320), wherein, A plurality of heat dissipation fins (310) are equidistantly arranged on the outer ring of the first pole plate (100) or the second pole plate (200), and the heat dissipation fin (310) is internally provided with a cavity; A plurality of heat dissipation fins (310) are communicated through the connecting pipeline (320); Each second heat dissipation structure (400) includes cavity (410) and coolant (420), wherein, The cavity (410) is arranged along the inner ring of the first pole plate (100) or the second pole plate (200); The coolant (420) is arranged in the cavity (410).

2. The high-power automobile rectifier bridge double-circulation heat dissipation structure according to claim 1, characterized in that, The heat dissipation fin (310) is provided with a first embedding groove (311), and the outer ring of the first pole plate (100) or the second pole plate (200) is embedded in the first embedding groove (311), and the heat dissipation fin (310) is provided with a connecting hole (312), and the connecting pipeline (320) is communicated with the connecting hole (312).

3. The high-power automobile rectifier bridge double-circulation heat dissipation structure according to claim 1, characterized in that, The cavity (410) is provided with a second embedding groove (411), and the inner ring of the first pole plate (100) or the second pole plate (200) is embedded in the second embedding groove (411).

4. The high-power automobile rectifier bridge double-circulation heat dissipation structure according to claim 1, characterized in that, The connecting pipeline (320) is a flexible high-temperature-resistant pipeline, and the connecting pipeline (320) is internally provided with a spiral reinforcing rib.

5. The high-power automobile rectifier bridge double-circulation heat dissipation structure according to claim 1, characterized in that, The coolant (420) is a glycol solution.

6. The high-power automobile rectifier bridge double-circulation heat dissipation structure according to claim 2, characterized in that, The inner wall of the first embedding groove (311) is provided with a heat-conducting silica gel layer, and the thickness of the heat-conducting silica gel layer is between 0.1-0.3 millimeters.

7. The high-power automobile rectifier bridge double-circulation heat dissipation structure according to claim 1, characterized in that, The surface of the heat dissipation fin (310) is coated with an alumina or titania heat dissipation coating, and the thickness of the coating is between 10-50 nanometers.

8. The high-power automobile rectifier bridge double-circulation heat dissipation structure according to claim 1, characterized in that, The heat dissipation fins (310) on the first pole plate (100) and the second pole plate (200) are staggered.

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