Phase change radiator and inversion equipment with same
By adopting arc-shaped connections and capillary structures in the phase change radiator, the problem of low heat dissipation efficiency in the prior art is solved, and a more efficient medium circulation and heat dissipation effect is achieved.
Patent Information
- Application Number
- CN202421116854.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The internal structure of the existing phase change radiator has a greater flow resistance to the medium, resulting in a lower heat dissipation efficiency.
A phase change radiator is designed, and its substrate and heat dissipation fins are connected by arc-shaped connections to form a round flared structure, reducing the resistance to medium flow, and a capillary structure is provided on the substrate to evenly distribute the medium.
It improves the heat dissipation efficiency of the phase change radiator, reduces the resistance to medium circulation, and ensures the efficient operation of the radiator.
Smart Images
Figure CN222509816U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of radiators, and in particular to a phase-change radiator and an inverter device having the same. Background Art
[0002] When the inverter is working, the IGBT (Insulated Gate Bipolar Transistor), inductor and other components inside the equipment box will generate heat, which will cause the ambient temperature inside the box to rise. The components in the box will be affected in the continuous high temperature environment. The service life of the components will be affected and there are certain safety risks.
[0003] In order to solve the problem of the increase in ambient temperature caused by the heating of components inside the box, a phase change radiator is generally installed in the box to dissipate heat. The phase change radiator absorbs heat through the change of the state of the internal medium and cools it to ensure that the ambient temperature inside the box will not be too high. The existing phase change radiator generally includes: a substrate and a heat sink fin. The substrate and the heat sink fin both have a cavity, and the cavities of the two are connected. After the substrate receives the heat transferred by the heating element, the liquid medium in the substrate absorbs the heat and vaporizes into a gaseous state. After the gas enters the cavity of the heat sink fin, it exchanges heat with the external environment and recondenses into a liquid state. The liquid medium flows back to the substrate to continue to dissipate heat and cool. However, the existing phase change radiator directly connects the flat substrate and the heat sink fin, which will form a sharp angle structure at the connection. This structure has a large flow resistance to the medium, resulting in low heat dissipation efficiency. Utility Model Content
[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the internal structure of the phase change radiator in the prior art has a large flow resistance to the medium, resulting in low heat dissipation efficiency, thereby providing a phase change radiator with small internal flow resistance and high heat dissipation efficiency and an inverter device having the same.
[0005] In order to solve the above problems, the utility model provides a phase change heat sink, comprising:
[0006] A substrate, wherein the substrate has a first cavity, and a phase change medium is disposed in the first cavity;
[0007] A plurality of heat dissipation fins are connected to the base plate through an arc-shaped connecting portion at one end of the heat dissipation fin, and the heat dissipation fin has a second cavity, and the second cavity is connected to the first cavity.
[0008] Optionally, a plurality of the heat dissipation fins are arranged in parallel and at intervals along a height direction of the substrate.
[0009] Optionally, a plurality of the heat dissipation fins are arranged in parallel and at intervals along one of the diagonals of the substrate.
[0010] Optionally, the angle between the heat dissipation fin and the substrate is an acute angle.
[0011] Optionally, the angle between the heat dissipation fins and the substrate is 45°.
[0012] Optionally, a capillary structure is provided on an inner wall of the substrate at a side away from the heat dissipation fins.
[0013] An inverter device comprises the phase-change radiator, wherein the phase-change radiator is arranged on a box body, a heating element is also arranged in the box body, and the heating element is arranged on a side wall of the substrate away from the cooling fins.
[0014] Optionally, a fan is further included which is arranged on the box body, and the fan is located on a side of the substrate away from the first heating element and is spaced apart from the heat dissipation fins.
[0015] Optionally, an air outlet is provided on the box body, and the air outlet is located on a side of the heat dissipation fin away from the fan, and the air outlet is opposite to the fan.
[0016] Optionally, a second heating element is provided between the heat dissipation fins and the air outlet.
[0017] The utility model has the following advantages:
[0018] 1. The phase change heat sink provided by the utility model includes: a substrate and a plurality of heat dissipation fins. The substrate has a first cavity, and a phase change medium is arranged in the first cavity. The heat dissipation fin is connected to the substrate through an arc-shaped connecting portion at one end, and the heat dissipation fin has a second cavity, and the second cavity is connected to the first cavity. When the substrate receives the heat transferred from the heating element, the phase change medium in the first cavity will change from liquid to gas, and absorb the heat. After the phase change medium changes to gas, it will enter the heat dissipation fin, and exchange heat with the external environment through the heat dissipation fin, and it will re-condense into liquid and return to the first cavity from the second cavity. The edges of the substrate and the heat dissipation fins in the prior art are straight edges. After the two are connected, a sharp-angle structure with edges and corners will be formed, which has a large flow resistance to the phase change medium, which will affect the flow of the phase change medium and reduce the heat dissipation efficiency of the radiator. One end of the heat dissipation fin in the phase change heat sink provided by the utility model is arc-shaped. After the arc connecting part is connected to the substrate, a rounded flared structure is formed at the connection point, which is conducive to guiding the gaseous phase change medium to flow into the second cavity without causing any obstruction to the gaseous phase change medium. It is also conducive to the liquid phase change medium to flow back to the first cavity, which can improve the overall heat dissipation efficiency of the radiator.
[0019] 2. The phase change radiator provided by the utility model has an acute angle between the heat dissipation fins and the substrate, which is equivalent to setting the heat dissipation fins obliquely on the substrate. In this way, when the gaseous phase change medium is re-condensed into liquid, it can quickly flow back to the first cavity along the inclined bottom surface of the heat dissipation fins, continue to participate in the heat dissipation and cooling work, improve the utilization rate of the phase change medium, and then improve the overall heat dissipation efficiency of the radiator.
[0020] 3. The phase change heat sink provided by the utility model has a capillary structure on the inner wall of the substrate away from the heat dissipation fins. The capillary structure allows the phase change medium that is re-condensed into liquid to be evenly distributed in the first cavity, thereby maintaining uniformity and comprehensiveness of heat dissipation of the substrate.
[0021] 4. The inverter device provided by the utility model includes a box body, and a phase change radiator and a heating element arranged on the box body. The heat emitted by the heating element is absorbed and cooled in time by the phase change radiator to keep the ambient temperature in the box body from being too high.
[0022] 5. In the inverter device provided by the utility model, the heating element is arranged on the side wall of the substrate away from the heat dissipation fins. Directly connecting the heating element to the substrate can absorb the heat emitted by the heating element in a timely and rapid manner, and the heat dissipation effect is better.
[0023] 6. The inverter device provided by the utility model is also provided with a fan on the box body, which is located on the side of the base plate away from the heating element and is spaced apart from the heat dissipation fins, that is, the fan and the heat dissipation fins are located on the same side. The fan can blow air to the heat dissipation fins to improve the heat dissipation efficiency of the heat dissipation fins.
[0024] 7. The inverter device provided by the utility model is provided with a second heating element between the heat dissipation fins and the air outlet. When the fan blows air toward the heat dissipation fins, the wind blown by the fan can be used to dissipate the heat of the second heating element. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 An isometric schematic diagram of a phase change heat sink according to a first embodiment of the utility model;
[0027] Figure 2 A schematic front view of a phase change heat sink according to a first embodiment of the utility model;
[0028] Figure 3 A schematic diagram of the connection between the substrate and the heat dissipation fins in a phase change heat sink according to the first embodiment of the utility model;
[0029] Figure 4 A front cross-sectional view of an inverter device according to a first embodiment of the utility model;
[0030] Figure 5 A side cross-sectional view of an inverter device according to a first embodiment of the utility model;
[0031] Figure 6 An isometric schematic diagram of a phase-changing heat sink according to a second embodiment of the present invention;
[0032] Figure 7 A front view of a phase change heat sink according to a second embodiment of the utility model;
[0033] Figure 8 A side view of a phase change heat sink according to a second embodiment of the present utility model;
[0034] Fig. 9 An isometric schematic diagram of a phase-changing heat sink according to a third embodiment of the utility model;
[0035] Fig.10 A side view of a phase-changing heat sink according to a third embodiment of the utility model;
[0036] Fig.11 Schematic diagram of the inverter device in Embodiment 4 of the present invention.
[0037] Description of reference numerals:
[0038] 1. Substrate;
[0039] 2. heat dissipation fins, 201, arc-shaped connecting portion;
[0040] 3. Box body;
[0041] 4. The first heating element;
[0042] 5. Fan;
[0043] 6. Air outlet;
[0044] 7. The second heating element. DETAILED DESCRIPTION
[0045] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0046] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0048] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0049] Embodiment 1
[0050] like Figure 1 , Figure 2 The figure shows a preferred embodiment of the phase change heat sink of the utility model. This phase change heat sink can be used in inverter equipment to dissipate heat and cool heating components such as IGBT (Insulated Gate Bipolar Transistor) and inductors to ensure that the ambient temperature of each component is not too high. Since the internal flow resistance of this phase change heat sink is small, it will not hinder the flow of the phase change medium, so the heat dissipation efficiency is high.
[0051] The above-mentioned phase change heat sink includes: a substrate 1 and a plurality of heat dissipating fins 2. The substrate 1 is in the shape of a plate and has good thermal conductivity, and can be made of materials with good thermal conductivity such as copper or aluminum alloy. The substrate 1 has a first cavity inside, and a phase change medium is arranged in the first cavity, and the phase change medium in the first cavity is generally in a liquid state. Commonly used phase change media include water, ammonia water, fluorinated alkanes, fluorinated ethers, cycloalkanes and Freon substitutes. A plurality of heat dissipating fins 2 are arranged on the substrate 1 at intervals, and are generally arranged on the same side of the substrate 1. Specifically, one end of the heat dissipating fin 2 is an arc-shaped connecting portion 201, and the upper and lower surfaces of the arc-shaped connecting portion 201 are curved surfaces, such as Figure 3As shown, the upper curved section of the arc-shaped connecting portion 201 is a downwardly curved curve, and the lower curved section of the arc-shaped connecting portion 201 is an upwardly curved curve. A hole or a groove is provided at the corresponding connection position between the substrate 1 and the heat dissipation fin 2. The heat dissipation fin 2 is connected to the substrate 1 through the arc-shaped connecting portion 201, and a flared opening similar to a spout or a nozzle is formed at the connection. There is a second cavity in the heat dissipation fin 2. After the heat dissipation fin 2 is connected to the substrate 1, the second cavity is also connected to the first cavity. When the substrate 1 receives the heat emitted by the heat-generating component, the phase change medium in the first cavity absorbs the heat and changes from liquid to gas. When the phase change medium changes to gas, it will gradually enter the second cavity of each heat sink fin 2. Since the heat sink fin 2 is placed at room temperature, the gas phase change medium will exchange heat with the external environment through the wall of the heat sink fin 2 after entering the second cavity. The high-temperature gas phase change medium will be re-condensed into liquid and return from the second cavity to the first cavity, that is, from the heat sink fin 2 to the substrate 1, and continue to participate in heat dissipation. In this way, the heat dissipation work is completed through the cyclic change of the phase change working medium state. During the circulation of the gas phase change medium, the curved surface of the arc-shaped connecting part 201 of the heat sink fin 2 is conducive to guiding the gas phase change medium to flow into the second cavity along the curved surface, and will not hinder the circulation of the gas phase change medium. At the same time, during the circulation of the liquid phase change medium, the curved surface of the arc-shaped connecting part 201 of the heat sink fin 2 is also conducive to guiding the liquid phase change medium to flow into the first cavity along the curved surface, thereby accelerating the circulation of the phase change medium and improving the overall heat dissipation efficiency of the radiator.
[0052] Furthermore, a plurality of heat dissipation fins 2 are arranged in parallel and at intervals along the height direction of the substrate 1, so that sufficient heat dissipation space can be reserved for adjacent heat dissipation fins 2. And the angle between the heat dissipation fins 2 and the substrate 1 is an acute angle. Figure 1 As shown, the heat sink fin 2 is also flat, and the heat sink fin 2 is tilted upward from the end close to the substrate 1 to the end away from the substrate 1, so that when the gas phase change medium is recondensed into a liquid phase change medium, it will quickly flow back into the first cavity along the tilted wall of the heat sink fin 2 to continue to participate in heat dissipation. Arranging the heat sink fin 2 in an inclined manner can further improve the heat dissipation efficiency of the radiator.
[0053] Specifically, in this embodiment, Figure 1 , Figure 2 As shown, the angle between the heat dissipation fin 2 and the substrate 1 is preferably 45°. Of course, in other embodiments, the angle between the heat dissipation fin 2 and the substrate 1 can be other angles between 0°-90°, such as 15°, 30°, 60°, etc.
[0054] In addition, the heat dissipation fins 2 and the substrate 1 may also be arranged perpendicularly, that is, the angle between the heat dissipation fins 2 and the substrate 1 may be 90°.
[0055] Furthermore, a capillary structure is provided on the inner wall of the substrate 1 away from the heat sink fin 2 , and the function of the capillary structure is to allow the liquid phase change medium in the second cavity to flow back into the first cavity evenly, thereby ensuring that the substrate 1 can dissipate heat evenly and comprehensively and maintain the temperature uniformity of the substrate 1 .
[0056] like Figure 4 , Figure 5 As shown, the utility model also provides an inverter device, including a housing 3, and a phase change heat sink and a first heating element 4 arranged on the housing 3. The housing 3 must meet the waterproof and sealing requirements. The phase change heat sink is fixedly arranged on the housing 3, and the upper and lower end surfaces of the substrate 1 can be connected to the housing 3. The first heating element 4 is arranged on the side wall of the substrate 1 away from the heat dissipation fins 2, so that when the first heating element 4 dissipates heat, it can be dissipated through the phase change heat sink as soon as possible. In this embodiment, the first heating element 4 is preferably an IGBT (Insulated Gate Bipolar Transistor).
[0057] Further, such as Figure 5 As shown, a fan 5 is also provided on the box body 3, and the fan 5 is located on the side of the substrate 1 away from the first heating element 4, and is spaced apart from the heat dissipation fins 2. The fan 5 can blow air toward the heat dissipation fins 2 to improve the heat dissipation performance of the heat dissipation fins 2, and condense the gaseous phase change medium into a liquid phase change medium more quickly for circulating heat dissipation. The number of fans 5 can be one or more. Specifically, in this embodiment, two fans 5 are provided in the box body 3.
[0058] Correspondingly, the box body 3 is further provided with an air vent 6 , which is located on a side of the heat dissipation fin 2 away from the fan 5 , and the air vent 6 is opposite to the fan 5 , so that the wind blown out by the fan 5 can flow smoothly.
[0059] In other embodiments, the fan 5 may not be provided. Since the temperature of the gaseous phase change medium is higher than the room temperature, it can directly exchange heat with the heat dissipation fins 2 and then condense into a liquid phase change medium.
[0060] The heat dissipation process of the inverter device provided in this embodiment is described as follows:
[0061] The first heating element 4 is arranged on the side of the substrate 1 away from the heat sink fins 2. When the first heating element 4 works to dissipate heat, it will be conducted to the substrate 1, and then the phase change medium in the first cavity of the substrate 1 absorbs heat and vaporizes from liquid to gas. The gaseous phase change medium will flow into the second cavity of each heat sink fin 2. Since the gaseous phase change medium has high heat and temperature, and the wall temperature of the heat sink fin 2 is low, and the fan 5 continuously blows out cold air to reduce the wall temperature of the heat sink fin 2, the gaseous phase change medium will be condensed into a liquid phase change medium again, and flow back to the first cavity along the inclined wall of the second cavity. The capillary structure allows the liquid phase change medium in each second cavity to be evenly distributed in the first cavity. After the liquid phase change medium returns to the first cavity, it can participate in heat dissipation again. The heat of the first heating element 4 is gradually absorbed and dissipated through the cyclic change of the phase change medium state, ensuring that the ambient temperature in the box 3 will not become too high due to the heating of the first heating element 4.
[0062] Embodiment 2
[0063] The difference between this embodiment and the first embodiment is that the heat dissipation fins 2 are arranged differently, and the remaining structures are the same as the phase change heat sink described in the first embodiment, so they are not described again.
[0064] like Figures 6 to 8 As shown, a plurality of heat dissipation fins 2 are arranged in parallel and at intervals along one diagonal line of the substrate 1, and the heat dissipation fins 2 are perpendicular to the substrate 1. This arrangement can provide more heat dissipation fins 2, which is beneficial to increase the heat dissipation area and improve the heat dissipation efficiency.
[0065] Embodiment 3
[0066] The difference between this embodiment and the second embodiment is that the heat dissipation fins 2 are arranged differently, and the remaining structures are the same as the phase change heat sink described in the first embodiment, so they are not described again.
[0067] like Fig. 9 , Fig.10 As shown, in this embodiment, multiple heat dissipation fins 2 are also arranged in parallel and at intervals along one of the diagonals of the substrate 1, but different from the second embodiment, the heat dissipation fins 2 and the substrate 1 are also arranged at an angle, which can also have the effect of accelerating the reflux of the liquid phase change medium.
[0068] Embodiment 4
[0069] The difference between this embodiment and the first embodiment is that a second heating element 7 is further provided between the heat dissipation fins 2 and the air outlet 6 , and the remaining structures are the same as those of the inverter device in the first embodiment, so they are not described in detail.
[0070] like Fig.11As shown, the second heating element 7 is disposed between the heat dissipation fins 2 and the air outlet 6, and the wind from the fan 5 to the heat dissipation fins 2 can be used to cool the second heating element 7, thereby improving the heat dissipation efficiency. Specifically, in this embodiment, the second heating element 7 is preferably an inductor.
[0071] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.
Claims
1. A phase change heat sink, characterized in that: include: A substrate (1), the substrate (1) having a first cavity, wherein a phase change medium is arranged in the first cavity; A plurality of heat dissipation fins (2), wherein the heat dissipation fins (2) are connected to the substrate (1) via an arc-shaped connecting portion (201) at one end, and the heat dissipation fins (2) have a second cavity, and the second cavity is connected to the first cavity.
2. The phase change heat sink according to claim 1, characterized in that: The plurality of heat dissipation fins (2) are arranged in parallel and at intervals along the height direction of the substrate (1).
3. The phase change heat sink according to claim 1, characterized in that: The plurality of heat dissipation fins (2) are arranged in parallel and at intervals along one diagonal line of the base plate (1).
4. The phase change heat sink according to claim 2, characterized in that: The included angle between the heat dissipation fins (2) and the base plate (1) is an acute angle.
5. The phase change heat sink according to claim 1, characterized in that: The included angle between the heat dissipation fins (2) and the base plate (1) is 45°.
6. The phase change heat sink according to any one of claims 1 to 5, characterized in that: The inner wall of the substrate (1) on a side away from the heat dissipation fins (2) is provided with a capillary structure.
7. An inverter device, comprising the phase-change radiator according to any one of claims 1 to 6, wherein the phase-change radiator is arranged on a box (3), characterized in that: A first heating element (4) is also arranged in the box body (3), and the first heating element (4) is arranged on a side wall of the substrate (1) away from the heat dissipation fins (2).
8. The inverter device according to claim 7, characterized in that: It also includes a fan (5) arranged on the box body (3), wherein the fan (5) is located on a side of the substrate (1) away from the first heating element (4) and is spaced apart from the heat dissipation fins (2).
9. The inverter device according to claim 8, characterized in that: The box body (3) is provided with an air outlet (6), and the air outlet (6) is located on a side of the heat dissipation fin (2) away from the fan (5), and the air outlet (6) is opposite to the fan (5).
10. The inverter device according to claim 9, characterized in that: A second heating element (7) is provided between the heat dissipation fins (2) and the air outlet (6).