Oil heater radiating fin and electrical oil heater

Abstract

The utility model provides an oil heater radiating fin and an electrical oil heater. The oil heater radiating fin comprises a first radiating part and a second radiating part. The first heat dissipation part is provided with a plurality of rows of connecting areas which are arranged at intervals in the first direction, and each connecting area comprises a plurality of first connecting points which are arranged at intervals in the second direction. In the first direction, the center of the first connecting point of the connecting area and the center of the first connecting point of the adjacent connecting area are arranged in a staggered mode. The second heat dissipation part is provided with a plurality of second connecting points, the second connecting points are connected with the first connecting points in a one-to-one correspondence mode, and a closed oil way cavity is defined by the second heat dissipation part and the first heat dissipation part. The heat radiation efficiency of the oil heater radiating fin is high.

Description

Technical Field

[0001] The utility model relates to the technical field of heating equipment, and more specifically to an oil radiator fin and an electric oil radiator. Background Art

[0002] An oil-filled electric heater, also known as an oil heater, features a heating tube installed within the oil heater's fins. Thermal oil is injected around the tube within the cavity. When powered on, the oil heats up and rises to the top of the cavity. It circulates along the fins and radiates heat through the cavity walls, heating the space.

[0003] In the prior art, oil-filled radiator fins consist of a large fin and a medium fin. After the large and medium fins are assembled and then hemmed, the fins are formed. The oil path of an oil-filled radiator fin consists of a straight-through channel between the large and medium fins, which serves as the flow path for the hot oil. However, in the prior art, the hot oil flow path is small, resulting in a small area for heat conduction at the center of the fin, which in turn leads to low heat radiation efficiency. Utility Model Content

[0004] In view of this, embodiments of the present invention provide an oil radiator heat sink and an electric oil radiator to solve the technical problem of low heat radiation efficiency of the oil radiator heat sink.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] The utility model provides an oil radiator heat sink, which includes: a first heat dissipation portion; a second heat dissipation portion; the first heat dissipation portion has a plurality of rows of connection areas spaced apart along a first direction, and each of the connection areas includes a plurality of first connection points spaced apart along a second direction; along the first direction, the center of the first connection point of the connection area is staggered with the center of the first connection point of the adjacent connection area; the second heat dissipation portion has a plurality of second connection points, and each of the second connection points is connected to each of the first connection points in a one-to-one correspondence, and the second heat dissipation portion and the first heat dissipation portion form a closed oil circuit cavity.

[0007] In some embodiments, a spacing region is formed between two adjacent first connection points of the connection region, and the first connection points of adjacent connection regions are located on one side of the spacing region along the first direction.

[0008] In some embodiments, the plurality of rows of connection areas include a first connection area and two rows of second connection areas, the two rows of second connection areas are spaced apart along the first direction, and the first connection area is disposed at the interval between the two rows of second connection areas;

[0009] The first connecting area is located in the enclosed area of two rows of the second connecting areas, and the length of the first connecting area is shorter than the length of the second connecting area along the second direction.

[0010] In some embodiments, the plurality of rows of the connecting areas comprises a plurality of rows of the first connecting areas and at least one row of the third connecting areas, the plurality of rows of the first connecting areas are arranged at intervals along the first direction, and the third connecting area is arranged at the interval between two rows of the first connecting areas.

[0011] The third connecting area is located in the enclosed area of two rows of the first connecting areas, and the length of the third connecting area is shorter than the length of the first connecting area along the second direction.

[0012] In some embodiments, the connecting areas located at the opposite ends of the first heat dissipation part along the first direction are second connecting areas, and the second connecting areas are arranged at intervals with the cavity wall of the oil passage cavity.

[0013] In some embodiments, the first connecting point is a welding groove, and a part of the outer surface of the first heat dissipation part is recessed to form the first connecting point; and / or,

[0014] The second connecting point is a welding groove, and a part of the outer surface of the second heat dissipation part is recessed to form the second connecting point.

[0015] In some embodiments, the welding groove is one of a cylindrical shape, a triangular shape, and a rhombic shape.

[0016] In some embodiments, around the oil passage cavity in the circumferential direction, a part of the first heat dissipation part and a part of the second heat dissipation part are attached, and in the attached area, a part of the first heat dissipation part and a part of the second heat dissipation part protrude in directions away from each other to form a reinforcing cavity arranged around the oil passage cavity in the circumferential direction.

[0017] In some embodiments, the reinforcing cavity comprises a first reinforcing segment extending along the first direction, and a second reinforcing segment extending along the second direction.

[0018] At least a part of the first reinforcing segment extends in a curve along the first direction; and / or,

[0019] At least a part of the second reinforcing segment extends in a curve along the second direction.

[0020] Embodiments of the utility model also provide a heating oil pot, comprising: a heat sink, comprising a plurality of the oil pot heat dissipation fins; an electric heating element, installed in the heat sink.

[0021] The embodiments of the present utility model provide an oil-filled radiator heat sink and an electric oil-filled radiator, wherein the oil-filled radiator heat sink includes a first heat sink and a second heat sink. The first heat sink has a plurality of rows of connection areas spaced apart along a first direction, and each connection area includes a plurality of first connection points spaced apart along a second direction. The second heat sink has a plurality of second connection points connected one-to-one with each first connection point. On the one hand, the second heat sink is connected to the first heat sink via the connection point, which can greatly reduce the impact of the connection area on the oil circuit structure, facilitate the circulation of hot oil in the oil circuit cavity, and enhance the thermal radiation efficiency of the oil-filled radiator heat sink. On the other hand, along the first direction, the center of the first connection point of the connection area is offset from the center of the first connection point of the adjacent connection area. As a result, the fluidity of the hot oil in the oil circuit cavity along different directions can be further enhanced, thereby further enhancing the thermal radiation efficiency of the oil-filled radiator heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of an oil-filled radiator heat sink in the related art;

[0023] Figure 2 for Figure 1 The top view of the hot oil circuit is shown in the figure.

[0024] Figure 3 for Figure 1 Bottom view of

[0025] Figure 4 for Figure 2 Middle AA section view;

[0026] Figure 5 for Figure 2 Middle BB cross-section;

[0027] Figure 6 This is a schematic structural diagram of an oil-filled radiator heat sink in one embodiment of the present application;

[0028] Figure 7 for Figure 6 The top view of the hot oil circuit is shown in the figure.

[0029] Figure 8 for Figure 6 Bottom view of

[0030] Figure 9 for Figure 7 A partial enlarged view of point C in the middle, where the dotted arrow represents the range of the first connection point in the connection area of ​​the same row;

[0031] Figure 10 for Figure 7 A partial enlarged view of point C in the middle, where the dotted arrow represents the range of the first connection point in the connection area of ​​the same row;

[0032] Figure 11 for Figure 7 Middle DD section view;

[0033] Figure 12 for Figure 7 Middle EE cross-sectional view;

[0034] Figure 13 for Figure 12 A partial enlarged view of point F in the middle.

[0035] Description of reference numerals:

[0036] 10. Oil-filled radiator heat sink; 10a. Oil circuit cavity; 10b. Reinforcement cavity; 10ba. First reinforcement section; 10bb. Second reinforcement section; 11. First heat dissipation part; 11a. Connection area; 11aa. First connection area; 11ab. Second connection area; 11ac. Third connection area; 11b. Spacing area; 111. First connection point; 12. Second heat dissipation part; 121. Second connection point; 20. Large piece; 20a. Straight oil circuit; 30. Middle piece. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The various specific technical features described in the specific embodiments may be combined in any suitable manner, unless they are inconsistent. For example, different embodiments and technical solutions may be formed by combining different specific technical features. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0039] In the following description, the terms "first, second, ..." are only used to distinguish different objects and do not mean that the objects have the same or related features. It should be understood that the orientation or position relationship of "first direction" and "second direction" is based on the attached Figure 8 It should be understood that these directional terms are only used to facilitate the description of this application and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application.

[0040] It should be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. "A plurality" means greater than or equal to two.

[0041] like Figures 1 to 5 As shown, in the related art, the oil radiator heat sink 10 is composed of a large sheet 20 and a middle sheet 30. After the large sheet 20 and the middle sheet 30 are assembled together, the large sheet 20 and the middle sheet 30 are hemmed to finally form the oil radiator heat sink 10. The oil radiator heat sink 10 has a straight-through oil path structure with three straight-through oil paths 20a. There is a welding area between two adjacent straight-through oil paths 20a, and no hot oil passes through the welding area. The middle straight-through oil path 20a is a high-temperature heat conduction area, and the straight-through oil paths 20a on both sides are low-temperature heat conduction areas. This reduces the area through which the hot oil flows, resulting in a small high-temperature heat conduction area in the center, which in turn leads to low heat radiation efficiency.

[0042] The present application embodiment provides an oil radiator heat sink 10, see Figure 6 and Figure 8 The oil-filled radiator heat sink 10 includes a first heat dissipation portion 11 and a second heat dissipation portion 12 .

[0043] See also Figure 6 、 Figure 7 、 Figure 9 and Figure 10 The first heat dissipation portion 11 has multiple rows of connection areas 11a spaced along the first direction, and each connection area 11a includes multiple first connection points 111 spaced along the second direction; along the first direction, the center of the first connection point 111 of the connection area 11a is staggered with the center of the first connection point 111 of the adjacent connection area 11a.

[0044] See also Figure 8 The second heat dissipation portion 12 has a plurality of second connection points 121 , each second connection point 121 is connected to each first connection point 111 in a one-to-one correspondence, and the second heat dissipation portion 12 and the first heat dissipation portion 11 form a closed oil path cavity 10 a.

[0045] Another embodiment of the present application provides an electric oil heater, which includes a heat sink and an electric heating element. The heat sink includes a plurality of oil heater fins 10 as described in any embodiment of the present application. The electric heating element is installed in the heat sink.

[0046] Specifically, see Figure 12The oil passage cavity 10a of the oil radiator fin 10 is an oil passage structure for circulating heating oil. The oil passage cavity 10a is formed by the second heat dissipation portion 12 and the first heat dissipation portion 11.

[0047] The first heat dissipation portion 11 and the second heat dissipation portion 12 can be fixed to each other by connecting the first connection point 111 and the second connection point 121 .

[0048] The first connection point 111 is a connection structure on the first heat dissipation portion 11 for correspondingly connecting to the second connection point 121 of the second heat dissipation portion 12 .

[0049] It should be noted that the second connection points 121 and the first connection points 111 are in one-to-one correspondence, that is, each first connection point 111 is connected to a corresponding second connection point 121 .

[0050] That is, the arrangement of the second connection points 121 on the second heat dissipation portion 12 is the same as the arrangement of the first connection points on the first heat dissipation portion 11 .

[0051] It is understandable that the specific connection method between the first connection point 111 and the second connection point 121 is not limited, such as corresponding welding of the first connection point 111 and the second connection point 121.

[0052] The specific structure of the first connection point 111 can be set according to actual conditions.

[0053] For example, see Figure 6 The first connection point 111 is a welding groove. A portion of the outer surface of the first heat dissipation portion 11 is recessed to form the first connection point 111. In other words, the outer surface of the first heat dissipation portion 11 is recessed inward to form the first connection point 111, which is then welded to the corresponding second connection point 121. This welding groove structure improves the connection stability between the first and second heat dissipation portions 11, 12. It also reduces the impact of the connection area 11a on the oil circuit structure and facilitates processing.

[0054] The specific structure of the second connection point 121 can be set according to actual conditions.

[0055] For example, see Figure 8 The second connection point 121 is a welding groove, and a portion of the outer surface of the second heat dissipation portion 12 is recessed to form the second connection point 121. In other words, the outer surface of the second heat dissipation portion 12 is recessed inward to form the second connection point 121, which is then welded to the corresponding first connection point 111.

[0056] It should be noted that the specific shape of the welding groove is not limited, such as cylindrical, triangular or diamond.

[0057] The first heat dissipation portion 11 has a plurality of rows of connection areas 11 a , and the connection areas 11 a are spaced apart along a first direction.

[0058] Furthermore, each connection area 11 a includes a plurality of first connection points 111 , and the first connection points 111 in the same row are spaced apart along the second direction.

[0059] The first direction and the second direction are different directions and form a certain angle, for example, the first direction is perpendicular to the second direction.

[0060] Along the first direction, the center of the first connection point 111 of a connection area 11a is offset from the center of the first connection point 111 of an adjacent connection area 11a. Specifically, between adjacent connection areas 11a, the center of the first connection point 111 and the center of all first connection points 111 of the adjacent connection areas 11a are not arranged along the first direction, that is, they are not in the same row (the row direction is the first direction). This offset arrangement allows the hot oil to flow in multiple directions within the oil path cavity 10a, significantly increasing the central high-temperature heat conduction area and improving heat radiation efficiency.

[0061] It should be noted that the center misalignment of the two first connection points 111 can mean that the two first connection points 111 are completely offset along the first direction, that is, no area between the two first connection points 111 is located in the same column (the direction of the column is the first direction). Of course, it is also possible that only part of the two first connection points 111 are offset along the first direction, and some part of the area is located in the same column, so that the centers of the two are not in the same column.

[0062] It can be understood that two adjacent connection areas 11 a refer to being adjacent to each other and having no other connection area 11 a between them.

[0063] In the oil-filled radiator heat sink 10 of the present embodiment, the second heat sink 12 is connected to the first heat sink 11 via a connection point. This significantly reduces the impact of the connection area 11a on the oil circuit structure, facilitates the flow of hot oil within the oil circuit cavity 10a, and enhances the heat radiation efficiency of the oil-filled radiator heat sink 10. Furthermore, along the first direction, the center of the first connection point 111 of the connection area 11a is offset from the center of the first connection point 111 of the adjacent connection area 11a. This further enhances the fluidity of the hot oil within the oil circuit cavity 10a in different directions, thereby further enhancing the heat radiation efficiency of the oil-filled radiator heat sink 10.

[0064] In one embodiment, please refer to Figure 10 A spacing region 11b is formed between two adjacent first connection points 111 of the connection region 11a, and the first connection points 111 of adjacent connection regions 11a are located on one side of the spacing region 11b along the first direction.

[0065] That is, the first connection point 111 is arranged corresponding to the spacing area 11b of the adjacent connection area 11a, thereby promoting the multi-directional flow of hot oil and improving the heat radiation efficiency.

[0066] In one embodiment, please refer to Figure 9 The multiple rows of connection areas 11a include first connection areas 11aa and two rows of second connection areas 11ab. The two rows of second connection areas 11ab are spaced apart along the first direction, and the first connection areas 11aa are located at the intervals between the two rows of second connection areas 11ab.

[0067] The first connection area 11aa is located within the enclosed area of ​​the two rows of second connection areas 11ab, and along the second direction, the length of the first connection area 11aa is shorter than the length of the second connection area 11ab. This facilitates the flow of hot oil into the gap between the two rows of second connection areas 11ab, and further facilitates multi-directional flow under the guidance of the first connection points 111 of each connection area 11a.

[0068] Specifically, among the multiple rows of connection areas 11a, one row is the first connection area 11aa, two rows are the second connection areas 11ab, and the two connection areas 11a are respectively located on opposite sides of the first connection area 11aa along the first direction.

[0069] The length of the first connection region 11aa along the second direction is shorter than the length of the second connection region 11ab, and the first connection region 11aa is located at the interval between the two second connection regions 11ab.

[0070] From the distribution of the first connection points 111 formed by the first connection area 11aa and the two second connection areas 11ab, the distribution range of each first connection point 111 of the second connection area 11ab along the second direction is longer than that of the first connection area 11aa, so that the hot oil can flow in more from the end of the first connection area 11aa, and then can better flow in multiple directions under the guidance of each first connection point 111, so as to improve the heat radiation efficiency.

[0071] In one embodiment, please refer to Figure 10 The multiple rows of connection areas 11a include multiple rows of first connection areas 11aa and at least one row of third connection areas 11ac. The multiple rows of first connection areas 11aa are spaced apart along the first direction, and the third connection areas 11ac are located between two rows of first connection areas 11aa.

[0072] The third connection area 11ac is located within the area enclosed by the two rows of first connection areas 11aa, and along the second direction, the length of the third connection area 11ac is shorter than the length of the first connection area 11aa. This further enhances the multi-directional flow of hot oil and improves the connection stability between the first heat dissipation portion 11 and the second heat dissipation portion 12.

[0073] Specifically, in the multiple rows of connection regions 11 a , in addition to two rows of second connection regions 11 ab and multiple rows of first connection regions 11 aa , one or more rows of third connection regions 11 ac are also included.

[0074] Along the second direction, the length of the third connection region 11ac is shorter than that of the first connection region 11aa, that is, the distribution range of the first connection points 111 of the third connection region 11ac is shorter than that of the first connection region 11aa.

[0075] It should be noted that, for the first connection area 11aa, the second connection area 11ab and the third connection area 11ac, they all meet the requirement of center staggered arrangement between the first connection points 111 of adjacent connection areas 11a, thereby improving the heat radiation efficiency.

[0076] In one embodiment, please refer to Figure 9 The connection areas 11a located at opposite ends of the first heat dissipation portion 11 along the first direction are second connection areas 11ab, and the second connection areas 11ab are spaced apart from the cavity wall of the oil path cavity 10a.

[0077] Specifically, the second connection area 11ab is the outermost connection area 11a in each row of connection areas 11a along the first direction. It is spaced from the wall of the oil passage cavity 10a. This facilitates connection between the first connection point 111 of the second connection area 11ab and the corresponding second connection point 121. Furthermore, it facilitates the flow of hot oil to the wall of the oil passage cavity 10a, thereby enhancing heat transfer at the edge of the oil passage cavity 10a.

[0078] In one embodiment, please refer to Figure 6 and Figure 12 Around the circumference of the oil circuit cavity 10a, parts of the first heat dissipation portion 11 and the second heat dissipation portion 12 are fitted together, and in the fitted area, parts of the first heat dissipation portion 11 and the second heat dissipation portion 12 protrude in directions away from each other to form a reinforcement cavity 10b arranged around the circumference of the oil circuit cavity 10a.

[0079] Specifically, the middle areas of the first heat dissipation portion 11 and the second heat dissipation portion 12 enclose the oil path cavity 10a, while the side areas of the first heat dissipation portion 11 and the second heat dissipation portion 12 are bonded to each other to improve connection stability.

[0080] At the same time, at the edges of the first and second heat dissipation sections 11 and 12, the bonding surfaces of the first and second heat dissipation sections 11 and 12 are partially protruded in directions away from each other, thereby forming a reinforcement cavity 10b. This, on the one hand, enhances the structural strength of the first and second heat dissipation sections 11 and 12. On the other hand, the protruding bonding surfaces of the first and second heat dissipation sections 11 and 12 increase the surface area of ​​the bonding area between the first and second heat dissipation sections 11 and 12, thereby improving heat radiation efficiency.

[0081] In one embodiment, please refer to Figures 6 to 8 The reinforcement cavity 10b includes a first reinforcement segment 10ba extending along a first direction and a second reinforcement segment 10bb extending along a second direction. At least a portion of the first reinforcement segment 10ba extends in a curved pattern along the first direction. This increases the surface area of ​​the first reinforcement segment 10ba, ensuring structural strength while increasing its length. This, in turn, increases the heat conduction area at the edge and improves heat radiation efficiency.

[0082] It should be noted that the first reinforcement section 10ba may extend in a curved shape in a partial area or in a curved shape in the entire area. For example, the first reinforcement section 10ba may be an "S"-shaped curve.

[0083] In one embodiment, please refer to Figures 6 to 8 The reinforcement cavity 10b includes a first reinforcement segment 10ba extending along a first direction and a second reinforcement segment 10bb extending along a second direction. At least a portion of the second reinforcement segment 10bb extends in a curved shape along the first direction. This increases the surface area of ​​the second reinforcement segment 10bb, ensuring structural strength while increasing the length of the second reinforcement segment 10bb. This, in turn, increases the heat conduction area at the edge and improves heat radiation efficiency.

[0084] It should be noted that the second reinforcement section 10bb may extend in a curved shape in a partial area or in a curved shape in the entire area, for example, the second reinforcement section 10bb may be an "S"-shaped curve.

[0085] The specific number of the first reinforcement segments 10ba and the second reinforcement segments 10bb is not limited.

[0086] For example, the reinforcement cavity 10b includes a first reinforcement section 10ba extending along a first direction and two second reinforcement sections 10bb extending along a second direction. The two second directions are located at opposite sides of the oil passage cavity 10a along the first direction.

[0087] In a specific embodiment, by staggering the centers of the first connection points 111 of adjacent connection areas 11a and extending the first reinforcement section 10ba and the second reinforcement section 10bb in a curve, the central high-temperature heat conduction area of ​​the oil path cavity 10a of the oil-heating radiator 10 can be increased by 13.3%, and the edge low-temperature heat conduction area can be increased by 6.1%, thereby improving the overall heat radiation efficiency.

[0088] The present invention provides a method for processing an oil radiator heat sink 10. The processing of the oil radiator heat sink 10 includes the following steps:

[0089] S1 , stamping and forming the first heat dissipation portion 11 and the second heat dissipation portion 12 respectively.

[0090] S2. Welding: The first connection point 111 of the first heat dissipation part 11 and the second connection point 121 of the second heat dissipation part 12 are welded one by one, and are welded together by multi-spot welding and seam welding to form the oil passage cavity 10a.

[0091] S3, edge treatment, please refer to Figure 11 and Figure 13 The connection between the first heat dissipation part 11 and the second heat dissipation part 12 is strengthened by edging, and the sealing performance of the oil-filled radiator fin 10 is improved.

[0092] The processing method of the oil radiator heat sink 10 of the embodiment of the utility model is convenient, and the processed oil radiator heat sink 10 has stable connection and good heat transfer effect.

[0093] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. An oil radiator heat sink (10), characterized in that: The oil radiator fin (10) comprises: A first heat dissipation portion (11), the first heat dissipation portion (11) having a plurality of rows of connection areas (11a) spaced apart along a first direction, each of the connection areas (11a) comprising a plurality of first connection points (111) spaced apart along a second direction; along the first direction, the center of the first connection point (111) of the connection area (11a) is staggered with the center of the first connection point (111) of an adjacent connection area (11a); A second heat dissipation portion (12), wherein the second heat dissipation portion (12) has a plurality of second connection points (121), each of the second connection points (121) is connected to each of the first connection points (111) in a one-to-one correspondence, and the second heat dissipation portion (12) and the first heat dissipation portion (11) form a closed oil circuit cavity (10a).

2. The oil radiator heat sink (10) according to claim 1, characterized in that: A spacing region (11b) is formed between two adjacent first connection points (111) of the connection region (11a), and the first connection points (111) of adjacent connection regions (11a) are located on one side of the spacing region (11b) along the first direction.

3. The oil radiator heat sink (10) according to claim 1, characterized in that: The multiple rows of connection areas (11a) include a first connection area (11aa) and two rows of second connection areas (11ab), the two rows of second connection areas (11ab) are spaced apart along the first direction, and the first connection area (11aa) is arranged at the interval between the two rows of second connection areas (11ab); The first connection area (11aa) is located in the enclosed area of ​​two rows of the second connection areas (11ab), and along the second direction, the length of the first connection area (11aa) is shorter than the length of the second connection area (11ab).

4. The oil radiator fin (10) according to claim 3, characterized in that: The multiple rows of connection areas (11a) include multiple rows of first connection areas (11aa) and at least one row of third connection areas (11ac), the multiple rows of first connection areas (11aa) are spaced apart along the first direction, and the third connection areas (11ac) are spaced apart between two rows of first connection areas (11aa); The third connection area (11ac) is located in the enclosed area of ​​two rows of the first connection areas (11aa), and along the second direction, the length of the third connection area (11ac) is shorter than the length of the first connection area (11aa).

5. The oil radiator heat sink (10) according to any one of claims 1 to 4, characterized in that: The connection areas (11a) located at opposite ends of the first heat dissipation portion (11) along the first direction are second connection areas (11ab), and the second connection areas (11ab) are spaced apart from the cavity wall of the oil path cavity (10a).

6. The oil radiator heat sink (10) according to any one of claims 1 to 4, characterized in that: The first connection point (111) is a welding groove, and a portion of the outer surface of the first heat dissipation portion (11) is recessed to form the first connection point (111); and / or, The second connection point (121) is a welding groove, and a partial area of ​​the outer surface of the second heat dissipation portion (12) is recessed to form the second connection point (121).

7. The oil radiator heat sink (10) according to claim 6, characterized in that: The welding groove is in one of a cylindrical, triangular and rhombus shape.

8. The oil radiator heat sink (10) according to any one of claims 1 to 4, characterized in that: Around the circumference of the oil path cavity (10a), partial areas of the first heat dissipation portion (11) and the second heat dissipation portion (12) are bonded together, and in the bonded areas, partial areas of the first heat dissipation portion (11) and the second heat dissipation portion (12) protrude in directions away from each other, thereby forming a reinforcement cavity (10b) arranged around the circumference of the oil path cavity (10a).

9. The oil radiator fin (10) according to claim 8, characterized in that: The reinforcement cavity (10b) comprises a first reinforcement section (10ba) extending along the first direction, and a second reinforcement section (10bb) extending along the second direction; Along the first direction, at least a portion of the first reinforcement section (10ba) extends in a curved shape; and / or, Along the second direction, at least a portion of the second reinforcement section (10bb) extends in a curved line.

10. An electric oil heater, characterized in that: include: A heat sink comprising a plurality of oil-filled radiator fins (10) as claimed in any one of claims 1 to 9; The electric heating element is installed in the heat sink.

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