WO2021218211A1 - Heat dissipation piece assembly and electric oil heater - Google Patents

Abstract

A heat dissipation piece assembly and an electric oil heater. The heat dissipation piece assembly comprises a first heat dissipation piece (10) and a second heat dissipation piece (20) connected to each other; an oil delivery channel (30) for delivering heat transfer oil is provided between the first heat dissipation piece (10) and the second heat dissipation piece (20); and the oil delivery channel (30) comprises, in a direction from bottom to top, a lower channel, a middle channel, and an upper channel that are communicated in sequence, a cross-sectional area of the lower channel being larger than that of the middle channel, and the cross-sectional area of the middle channel being smaller than that of the upper channel. The portion of the oil delivery channel (30) having a larger cross-sectional area can contain more heat transfer oil, store larger amount of heat, and transfer more heat, such that the temperature of the upper portion of the heat dissipation piece assembly can be kept within a certain range, thus preventing excessively high temperature of the upper portion region of the heat dissipation piece assembly while meeting the heating demand.

Description

Heat sink assembly and electric oil heater

This application claims the priority of the patent application filed to the State Intellectual Property Office of China on April 30, 2020 with the application number 202010366309.8 and the invention titled "heat sink assembly and electric heating oil heater".

Technical field

The application relates to the technical field of electric heating oil heaters, and specifically to a heat sink assembly and electric heating oil heaters.

Background technique

The core component of the existing electric heating oil heater is an oil heater body, and the oil heater body is composed of a number of heat sink components, electric heating tube components, sealing components and heat transfer oil. Among them, the heat sink assembly is composed of two heat sinks with independent sheet-like structures attached to each other.

The existing heat sink assembly has poor temperature uniformity during use, and the peripheral temperature of the upper area of the heat sink assembly drifts too fast, easily exceeding the specified limit range, and it is easy to burn hands. If other control measures are taken, it will affect the performance of the heat sink assembly. Heating effect.

Summary of the invention

The present application provides a heat sink assembly and an electric heating oil radiator, so as to avoid excessively high temperature in the upper area of the heat sink assembly and to ensure heating performance.

In order to achieve the above objective, according to one aspect of the present application, the present application provides a heat sink assembly, comprising: a first heat sink and a second heat sink connected to each other, the first heat sink and the second heat sink There is an oil transfer channel between them, and the oil transfer channel is used to transport heat transfer oil; in the direction from bottom to top, the oil transfer channel includes a lower channel, a middle channel, and an upper channel that are sequentially connected; wherein, the The cross-sectional area of the lower channel is larger than the cross-sectional area of the middle channel, and the cross-sectional area of the middle channel is smaller than the cross-sectional area of the upper channel.

Further, the oil delivery passage includes a plurality of oil passages arranged at intervals.

Further, in a direction from bottom to top, each of the oil passages includes a lower section, a middle section, and an upper section that are sequentially connected; the sum of the cross-sectional areas of the lower sections of the multiple oil passages of the oil delivery passage is the lower section The cross-sectional area of the passage, the sum of the cross-sectional areas of the middle sections of the multiple oil passages of the oil conveying passage is the cross-sectional area of the middle passage, and the sum of the cross-sectional areas of the upper sections of the multiple oil passages of the oil conveying passage is The cross-sectional area of the upper channel.

Further, in each of the oil passages, the cross-sectional area of the lower section is larger than the cross-sectional area of the middle section, and the cross-sectional area of the middle section is smaller than the cross-sectional area of the upper section.

Further, the first heat sink has a recessed first sinking platform, and the peripheral edge of the second heat sink matches the peripheral edge of the first sinking platform.

Further, the first radiating fin is provided with a first positioning member, the second radiating fin is provided with a second positioning member, and the second positioning member is matched with the first positioning member to match the first radiating fin. And the second heat sink for positioning.

Further, one of the first positioning member and the second positioning member is a convex structure, the other of the first positioning member and the second positioning member is a groove structure, and the convex The structure is buckled with the groove structure.

Further, the first heat sink includes a main body and a heat sink connected to the periphery of the main body, the second heat sink is connected to the main body, and the oil delivery channel is located between the main body and the second heat sink. Between the fins, the heat dissipation plate is provided with a concave second sinking platform.

Further, the periphery of the heat dissipation plate has a flanging structure.

Further, the height of the heat sink assembly is L, the distance between the lower end of the upper channel and the upper end surface of the heat sink assembly is L1, L1≤1/4L, and the upper end of the lower channel is The distance between the lower end faces of the heat sink assembly is L2, and L2≤1/2L.

Further, the oil delivery passage extends in a vertical direction.

According to another aspect of the present application, an electric heating oil heater is provided, and the electric heating oil heater includes the above-mentioned heat sink assembly.

Applying the technical solution of the present application, a heat sink assembly is provided. The heat sink assembly includes a first heat sink and a second heat sink that are connected to each other. There is an oil transport channel between the first heat sink and the second heat sink. The channel is used to transport heat transfer oil; in the direction from bottom to top, the oil delivery channel includes a lower channel, a middle channel, and an upper channel that are sequentially connected; the cross-sectional area of the lower channel is larger than the cross-sectional area of the middle channel. The cross-sectional area is smaller than the cross-sectional area of the upper channel. In this solution, the larger the position of the cross-sectional area of the oil conveying channel, the more heat-conducting oil is contained, the greater the amount of heat storage, and the greater the amount of heat transferred. When the heat sink assembly is working, the lower channel first absorbs and stores heat, and then transfers heat and dissipates heat. The upper middle channel becomes narrower, and the heat transfer rate becomes smaller and the speed slows down. After being transferred to the upper channel, it will not heat up too fast. , While the upper channel obtains the heat transferred from the middle channel, the upper area of the heat sink assembly exchanges heat with the outside air to dissipate heat. In this way, the temperature of the upper part of the heat sink assembly can be kept within a certain range, thereby not only meeting the heating performance requirements, but also avoiding the temperature of the upper area of the heat sink assembly being too high.

Description of the drawings

The drawings of the specification forming a part of the application are used to provide a further understanding of the application, and the exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

Figure 1 shows a schematic structural diagram of a heat sink assembly provided by an embodiment of the present application;

Figure 2 shows another view of the heat sink assembly in Figure 1;

Figure 3 shows a cross-sectional view of the heat sink assembly in Figure 2 at the T-T position;

Figure 4 shows a cross-sectional view of the heat sink assembly in Figure 2 at position M-M;

Figure 5 shows a cross-sectional view of the heat sink assembly in Figure 2 at position D-D;

Fig. 6 shows an exploded view of the heat sink assembly in Fig. 1;

Figure 7 shows a cross-sectional view of the heat sink assembly in Figure 1 at position A-A;

Figure 8 shows the exploded view of Figure 7;

Fig. 9 shows another view of the heat sink assembly in Fig. 1.

Among them, the above drawings include the following reference signs:

10. First heat sink; 11. First sinking platform; 12. Main body; 13. Heat sink; 14. Second sinking platform; 15. Flanging structure; 20. Second heat sink; 30. Oil conveying channel; 31. 32. Lower section; 33. Middle section; 34. Upper section; 41. First positioning member; 42, second positioning member; 43. Upper oil bag; 44. Lower oil bag.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, and in no way serves as any restriction on the application and its application or use. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

As shown in the drawings, the embodiment of the present application provides a heat sink assembly, including: a first heat sink 10 and a second heat sink 20 connected to each other, and the first heat sink 10 and the second heat sink 20 are between The oil conveying passage 30 is used for conveying heat transfer oil; in the direction from bottom to top, the oil conveying passage 30 includes a lower passage, a middle passage and an upper passage that are connected in sequence; wherein, the cross-sectional area of the lower passage is larger than The cross-sectional area of the middle channel is smaller than the cross-sectional area of the upper channel.

Applying the technical solution of the present application, a heat sink assembly is provided. The heat sink assembly includes a first heat sink 10 and a second heat sink 20 that are connected to each other. The first heat sink 10 and the second heat sink 20 have oil Channel 30, the oil channel 30 is used to transport heat transfer oil; in the direction from bottom to top, the oil channel 30 includes a lower channel, a middle channel and an upper channel that are connected in sequence; wherein the cross-sectional area of the lower channel is larger than that of the middle channel The cross-sectional area of the middle channel is smaller than that of the upper channel. In this solution, the larger the position of the cross-sectional area of the oil conveying passage 30, the more heat-conducting oil is contained, the greater the amount of heat storage, and the greater the amount of heat transferred. When the heat sink assembly is working, the lower channel first absorbs and stores heat, and then transfers heat and dissipates heat. The upper middle channel becomes narrower, and the heat transfer rate becomes smaller and the speed slows down. After being transferred to the upper channel, it will not heat up too fast. , While the upper channel obtains the heat transferred from the middle channel, the upper area of the heat sink assembly exchanges heat with the outside air to dissipate heat. In this way, the temperature of the upper part of the heat sink assembly can be kept within a certain range, thereby not only meeting the heating performance requirements, but also avoiding the temperature of the upper area of the heat sink assembly being too high.

Specifically, the height of the heat sink assembly is L, the distance between the lower end of the upper channel and the upper end face of the heat sink assembly is L1, L1≤1/4L, the distance between the upper end of the lower channel and the lower end face of the heat sink assembly For L2, L2≤1/2L. This also defines the length range of the lower channel, the middle channel and the upper channel. Through the limitation of the above parameters, the temperature uniformity and heating performance of the heat sink assembly can be further improved.

In this embodiment, the oil delivery passage 30 includes a plurality of oil passages 31 arranged at intervals. By providing multiple oil passages 31, the heat transfer oil can flow to different positions in the heat sink assembly, which improves the heat exchange effect and the temperature uniformity of the heat sink assembly. It should be noted that multiple refers to two or more.

Further, in this embodiment, the oil conveying passage 30 extends in a vertical direction, which can facilitate the flow of the heat transfer oil and make the heat sink assembly compact. In the case where the oil passage 30 includes a plurality of oil passages 31, each oil passage 31 extends in the vertical direction.

In this embodiment, in the direction from bottom to top, each oil passage 31 includes a lower section 32, a middle section 33, and an upper section 34 that are connected in sequence; The sum of is the cross-sectional area of the lower channel, the sum of the cross-sectional areas of the middle section 33 of the multiple oil passages 31 of the oil channel 30 is the cross-sectional area of the middle channel, and the cross-sectional area of the upper section 34 of the multiple oil channels 31 of the oil channel 30 The sum of is the cross-sectional area of the upper channel. In this way, the cross-sectional area of the oil delivery passage 30 through which the heat transfer oil flows from bottom to top can be changed from large to small, and then to large.

Specifically, in each oil passage 31, the cross-sectional area of the lower section 32 is larger than the cross-sectional area of the middle section 33, and the cross-sectional area of the middle section 33 is smaller than the cross-sectional area of the upper section 34. In this way, for each oil path 31, the lower section 32 first absorbs heat and stores heat, and then transfers heat and dissipates heat. The upper middle section 33 becomes narrower, the heat transfer amount becomes smaller and the speed slows down, and the upper section 34 does not heat up. Quickly, while the upper section 34 obtains the heat transferred from the middle section 33, the upper area of the fin assembly exchanges heat with the outside air to dissipate heat. This is more conducive to maintaining the temperature of the upper part of the heat sink assembly within a certain range, and improves the uniformity of the temperature distribution of the heat sink assembly in the horizontal direction.

In this embodiment, the first heat sink 10 has a recessed first sinking platform 11, and the peripheral edge of the second heat sink 20 matches the peripheral edge of the first sinking platform 11. In this way, it is convenient to position the first heat sink 10 and the second heat sink 20 during assembly, and avoid position deviation. This can prevent shaking and misalignment, and solve the problem of oil circuit misalignment or oil circuit blocking in the past, which affects product performance.

Further, the first radiating fin 10 is provided with a first positioning member 41, and the second radiating fin 20 is provided with a second positioning member 42. The second positioning member 42 is matched with the first positioning member 41 to match the first radiating fin 10 and The second heat sink 20 is positioned. With the first positioning member 41 and the second positioning member 42, the first heat sink 10 and the second heat sink 20 can be positioned conveniently and quickly.

Optionally, there are two first positioning members 41 spaced apart on the first radiating fin 10, two second positioning members 42 spaced apart on the second radiating fin 20, two second positioning members 42 and two The first positioning members 41 are arranged in one-to-one correspondence, so that the positioning effect can be further improved.

Specifically, one of the first positioning member 41 and the second positioning member 42 is a convex structure, and the other of the first positioning member 41 and the second positioning member 42 is a groove structure, and the convex structure is buckled with the groove structure. combine. This structure has precise positioning and convenient operation. Further, the first positioning member 41 is a hemispherical convex structure, and the second positioning member 42 is a hemispherical groove structure, which can play a guiding role during assembly and facilitate alignment.

In this embodiment, the first heat sink 10 includes a main body 12 and a heat sink 13 connected to the periphery of the main body 12. The second heat sink 20 is connected to the main body 12, and the oil delivery channel 30 is located between the main body 12 and the second heat sink 20. In between, the heat sink 13 has a recessed second sinking platform 14. By providing the heat dissipation plate 13, the contact area with the air can be increased, and the heat exchange effect can be improved. Moreover, by providing the second sinking platform 14, the structural strength of the heat dissipation plate 13 can be improved, and the deformation resistance can be improved.

Further, in this embodiment, the periphery of the heat dissipation plate 13 has a flanging structure 15. By providing the flanging structure 15, the strength of the heat dissipation plate 13 can be further improved, and the heat dissipation plate 13 can be prevented from being deformed by force.

Optionally, there is an upper oil bag 43 and a lower oil bag 44 between the first heat sink 10 and the second heat sink 20, wherein the lower oil bag 44 is in communication with the lower end of the oil conveying passage 30, and the upper oil bag 43 is connected to the oil conveying channel 30. The upper end of the channel 30 communicates. This can easily accommodate the heat transfer oil and the flow of the heat transfer oil.

Another embodiment of the present application provides an electric heating oil heater, which includes the above-mentioned heat sink assembly. The heat sink assembly includes a first heat sink 10 and a second heat sink 20 that are connected to each other. There is an oil conveying passage 30 extending in a vertical direction between the first heat sink 10 and the second heat dissipating fin 20, and the oil conveying passage 30 is used for Conveying heat transfer oil; in the direction from bottom to top, the oil delivery channel 30 includes a lower channel, a middle channel and an upper channel that are sequentially connected; wherein the cross-sectional area of the lower channel is larger than that of the middle channel, and the cross-sectional area of the middle channel It is smaller than the cross-sectional area of the upper channel. In this solution, the larger the position of the cross-sectional area of the oil conveying passage 30, the more heat-conducting oil is contained, the greater the amount of heat storage, and the greater the amount of heat transferred. When the heat sink assembly is working, the lower channel first absorbs and stores heat, and then transfers heat and dissipates heat. The upper middle channel becomes narrower, and the heat transfer rate becomes smaller and the speed slows down. After being transferred to the upper channel, it will not heat up too fast. , While the upper channel obtains the heat transferred from the middle channel, the upper area of the heat sink assembly exchanges heat with the outside air to dissipate heat. In this way, the temperature of the upper part of the heat sink assembly can be kept within a certain range, thereby not only meeting the heating performance requirements, but also avoiding the temperature of the upper area of the heat sink assembly being too high.

Further, the electric heating oil tank includes a plurality of radiating fin assemblies arranged in a row, the upper oil pockets of two adjacent radiating fin components are connected, and the lower oil pockets of two adjacent radiating fin components are connected.

In order to facilitate the understanding of this solution, the following further details.

The heat sink assembly is designed with three or more oil paths distributed on the heat sink assembly. The oil path of the heat sink assembly is from bottom to top: the cross-sectional area of the lower oil path and the cross-sectional area of the upper oil path of the heat sink assembly are larger than those of the middle oil path. area. That is, the oil path gradually narrows from bottom to top, and after passing through the middle oil path, it gradually widens from top to top. Under the effect of temperature difference driving, heat is transferred from bottom to top by means of the heat transfer oil in the oil circuit. The lower part of the heat sink assembly has a large cross-sectional area of the oil path, which transfers a lot of heat-conducting oil and stores a large amount of heat. The middle oil circuit has a small cross-sectional area, less heat transfer oil, less heat transfer, and slow transfer speed. The upper oil circuit has a large cross-sectional area, and the amount of oil transferred is larger than that of the intermediate oil circuit, and its heat demand is greater than the heat transferred by the intermediate oil circuit. When working, the lower part first absorbs and stores heat, and then transfers heat and dissipates heat. As the oil path that is transferred upward becomes narrower, the amount of oil transferred becomes smaller, the amount of heat transfer becomes smaller, and the heat transfer speed gradually slows down. The upper part of the heat sink assembly receives the heat transferred from the middle part, and at the same time exchanges heat with the outside air to dissipate heat. Through the control of the cross-sectional area of the upper, middle and lower oil passages, the peripheral temperature of the upper surface of the heat sink assembly is maintained within a certain range, and the temperature of the lower part is automatically adjusted according to the heating demand. In this way, it not only solves the heating performance requirements of the oil heater system, but also solves the problem of anti-scalding around the surface of the oil heater.

Further, the sinking table and the positioning member on the heat sink assembly enable the two heat sinks in the assembly to be precisely attached to each other in the front, back, left, and right sides, which solves the problem of possible misalignment between the two heat sinks.

Furthermore, the sinking table and flanging structure around the oil circuit of the heat sink assembly solves the problem of low strength of the sheet-shaped parts.

It should be noted that the oil radiator body of the electric heating oil radiator product is connected up and down by a plurality of radiating fin components through a plurality of oil packs, so that the multiple oil passages in each radiating fin component are connected to each other. The oil radiator body is composed of a number of heat sink components, electric heating pipes, heat transfer oil, and seals. The heat sink assembly consists of two independent heat sink assemblies which are attached to each other. The upper and lower heat sink assemblies have oil sump cavities connected to each other. The multiple oil passages between the heat sink assemblies pass through the upper and lower oil spools. The cavities are connected, and the heat transfer oil is stored in the oil pocket cavity and the oil circuit to realize heat transfer.

In addition, the communication channel of the lower oil sump cavity of the heat sink assembly is provided with a heating element, which is a heat source position. After power on, the heat is transferred to the heat-conducting oil, absorbed by the heat-conducting oil, and then transferred around. Among them, the heat transfer oil in the oil circuit of the heat sink assembly transfers heat to the channel, and the transfer direction is from bottom to top. The heat sink components on existing products have well-proportioned oil passages, and the amount of heat conduction oil per unit cross-sectional area on the oil passages is the same, and the heat transfer rate cannot be self-adjusted, resulting in excessively rapid temperature rise around the upper part of the heat sink. It is easy to exceed the specified limit range. If other control measures are taken, it will affect the heating effect of the oil radiator system.

However, the design of this scheme is from bottom to top, and the cross-sectional area of the lower oil circuit and the cross-sectional area of the upper oil circuit of the heat sink assembly are both larger than the cross-sectional area of the middle oil circuit. That is, the oil passage gradually becomes narrower from bottom to top, and after passing through the middle oil passage, it gradually becomes wider again upwards. It can also be understood that the oil volume per unit cross-sectional area of the lower oil passage is greater than the oil volume per unit cross-sectional area of the middle oil passage, while the oil volume per unit cross-sectional area of the upper oil passage is greater than the oil volume per unit cross-sectional area of the middle oil passage. The heat transfer rate of the upper, middle and lower oil passages is gradually uneven. In the process of heat transfer from bottom to top, the transfer speed is changed from large to small and then to large. Through the gradual way of oil passage, the heat is adjusted. The transfer ratio keeps the maximum temperature of the upper part of the heat sink assembly lower than the temperature of the lower part of the heat sink assembly, which is not only easy to solve the problem of anti-scalding around the heat sink assembly, but also helps to improve the heating and heating performance of the heat sink assembly.

The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims (12)

1. A heat sink assembly is characterized in that it comprises:

   The first heat sink (10) and the second heat sink (20) are connected to each other, and there is an oil conveying channel (30) between the first heat sink (10) and the second heat sink (20). The oil conveying channel (30) is used for conveying heat transfer oil;

   In the direction from bottom to top, the oil delivery channel (30) includes a lower channel, a middle channel, and an upper channel that are sequentially connected; wherein the cross-sectional area of the lower channel is larger than the cross-sectional area of the middle channel, so The cross-sectional area of the middle channel is smaller than the cross-sectional area of the upper channel.
2. The heat sink assembly according to claim 1, wherein the oil delivery passage (30) comprises a plurality of oil passages (31) arranged at intervals.
3. The heat sink assembly according to claim 2, characterized in that, in a direction from bottom to top, each oil passage (31) includes a lower section (32), a middle section (33) and an upper section ( 34); The sum of the cross-sectional area of the lower section (32) of the multiple oil passages (31) of the oil passage (30) is the cross-sectional area of the lower passage, and the oil passage (30) has more The sum of the cross-sectional area of the middle section (33) of each oil passage (31) is the cross-sectional area of the middle passage, and the upper section (34) of the multiple oil passages (31) of the oil passage (30) The sum of the cross-sectional area is the cross-sectional area of the upper channel.
4. The heat sink assembly according to claim 3, characterized in that, in each of the oil passages (31), the cross-sectional area of the lower section (32) is greater than the cross-sectional area of the middle section (33), and the middle section The cross-sectional area of (33) is smaller than the cross-sectional area of the upper section (34).
5. The heat sink assembly according to claim 1, wherein the first heat sink (10) has a first sinking table (11) that is recessed, and the periphery of the second heat sink (20) is connected to the second heat sink (20). The periphery of a sinking platform (11) matches.
6. The heat sink assembly according to claim 1, wherein the first heat sink (10) is provided with a first positioning member (41), and the second heat sink (20) is provided with a second positioning member ( 42), the second positioning member (42) is matched with the first positioning member (41) to position the first heat sink (10) and the second heat sink (20).
7. The heat sink assembly according to claim 6, wherein one of the first positioning member (41) and the second positioning member (42) is a convex structure, and the first positioning member (41) ) And the other of the second positioning member (42) is a groove structure, and the protruding structure is buckled with the groove structure.
8. The heat sink assembly according to claim 1, wherein the first heat sink (10) comprises a main body (12) and a heat sink (13) connected to the periphery of the main body (12), and the first heat sink (10) Two heat sinks (20) are connected to the main body (12), the oil conveying channel (30) is located between the main body (12) and the second heat sink (20), and the heat sink (13) There is a second sinking platform (14) with a depression on the upper surface.
9. The heat sink assembly according to claim 8, characterized in that the periphery of the heat sink (13) has a flanging structure (15).
10. The heat sink assembly of claim 1, wherein the height of the heat sink assembly is L, the distance between the lower end of the upper channel and the upper end surface of the heat sink assembly is L1, and L1≤1 /4L, the distance between the upper end of the lower channel and the lower end surface of the heat sink assembly is L2, and L2≤1/2L.
11. The heat sink assembly according to claim 1, wherein the oil delivery channel (30) extends in a vertical direction.
12. An electric heating oil heater, characterized in that the electric heating oil heater comprises the heat sink assembly according to any one of claims 1 to 11.

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