A heat exchange device

Abstract

This invention provides a heat exchange device, including a liquid-cooled plate and a first heat exchanger. The liquid-cooled plate is vertically arranged and includes a first plate body, a second plate body attached to the first plate body, and a first cavity formed in the first and second plate bodies. The first heat exchanger includes a first manifold and multiple first flat tubes. The first flat tubes are disposed on the first plate body, and the interior of each first flat tube has multiple microchannels arranged horizontally. One end of each microchannel is connected to the upper part of the first cavity, and the other end of each microchannel is connected to the first manifold. This invention has a compact structure, unlike the large space size of split structures. It makes full use of the space at the same height of the liquid-cooled plate, which can meet higher heat exchange requirements under low air volume. It eliminates the physical structure of evaporator and condenser tubes, saving more space. Under thermally driven pressure difference, the heat exchanger can form a stable unidirectional circulation inside, resulting in stable and excellent heat exchange capacity.

Description

Technical Field

[0001] This utility model relates to the field of thermal management technology, and in particular to a heat exchange device. Background Technology

[0002] In the high heat flux density chip industry, thermal management technology for energy storage PCS is a core element in ensuring the efficient, safe, and long-life operation of the entire system. Power electronic devices (such as IGBTs and SiC MOSFETs) generate significant heat under high-frequency switching and high-power conditions. Among existing thermal management technologies, active cooling is the primary solution, including active water cooling and immersion liquid cooling. However, active cooling requires regular manual maintenance, resulting in high maintenance costs. Furthermore, it necessitates a heat pipe connection between the condenser and evaporator, which, limited by the capillary force of the heat pipe, degrades the heat dissipation effect of the heat exchange device, failing to meet the high heat flux density cooling requirements. Therefore, it is necessary to provide a heat exchange device that overcomes the aforementioned shortcomings. Utility Model Content

[0003] The purpose of this invention is to provide a heat exchange device.

[0004] According to one aspect of the present invention, a heat exchange device is provided, comprising:

[0005] A liquid cooling plate, wherein the liquid cooling plate is vertically arranged, the liquid cooling plate includes a first plate body and a second plate body attached to the first plate body, a first cavity is formed between the first plate body and the second plate body, and the first cavity is filled with a phase change refrigerant;

[0006] The first heat exchanger includes a first manifold and a plurality of first flat tubes. The first flat tubes are disposed on the first plate. The first flat tubes have a plurality of microchannels arranged in a horizontal direction inside. One end of the microchannel is connected to the upper part of the first cavity, and the other end of the microchannel is connected to the first manifold.

[0007] The phase change refrigerant absorbs external heat and changes from liquid refrigerant to gaseous refrigerant. The gaseous refrigerant rises to the upper part of the first cavity and condenses into liquid refrigerant through the first flat tube. It then flows back to the lower part of the first cavity through the first manifold and the first flat tube.

[0008] Preferably, the width of the first flat tube is set along the vertical direction, and the phase change refrigerant at least submerges the lowest microchannel.

[0009] Preferably, the width of the first flat tube is set along the horizontal direction, and the phase change refrigerant at least submerges the bottommost first flat tube.

[0010] Preferably, the second plate is fitted to the heat source in the lower part of the first cavity.

[0011] Preferably, a turbulence element is provided in the lower region of the first cavity.

[0012] Preferably, the turbulence element is a turbulence column disposed on the second plate, and the cross-sectional shape of the turbulence column is one or more of the following: circular, elliptical, or polygonal.

[0013] Preferably, the turbulence element is a turbulence fin welded to the second plate, and the turbulence fin is one or more of the following forms: staggered teeth, wavy teeth, and V-shaped teeth.

[0014] Preferably, heat dissipation fins are provided between two adjacent first flat tubes.

[0015] Preferably, the heat exchange device further includes a cooling fan that guides airflow through the heat dissipation fins.

[0016] According to another aspect of the present invention, a heat exchange device is provided, comprising: a liquid-cooled plate, the liquid-cooled plate being vertically arranged, the liquid-cooled plate including a first plate body and a second plate body attached to the first plate body, forming a first cavity and a second cavity between the first plate body and the second plate body, the first cavity and the second cavity being independent of each other, and both the first cavity and the second cavity being filled with a phase change refrigerant; a first heat exchanger, the first heat exchanger including a first manifold and a plurality of first flat tubes, the first flat tubes being disposed on the first plate body, the first flat tubes having a plurality of microchannels arranged horizontally inside, one end of the microchannels being connected to the upper part of the first cavity, and the other end of the microchannels being connected to the first manifold; and a second heat exchanger, the second heat exchanger including a second manifold and a plurality of second flat tubes, the second flat tubes being disposed on the first plate body, the second flat tubes having a plurality of microchannels arranged horizontally inside, one end of the microchannels being connected to the upper part of the second cavity, and the other end of the microchannels being connected to the second manifold;

[0017] The phase change refrigerant located in the first cavity absorbs external heat, transforming from a liquid refrigerant into a gaseous refrigerant. The gaseous refrigerant rises to the upper part of the first cavity and condenses into a liquid refrigerant through the first flat tube, then flows back to the lower part of the first cavity through the first manifold and the first flat tube. The phase change refrigerant located in the second cavity absorbs external heat, transforming from a liquid refrigerant into a gaseous refrigerant. The gaseous refrigerant rises to the upper part of the second cavity and condenses into a liquid refrigerant through the second flat tube, then flows back to the lower part of the second cavity through the second manifold and the second flat tube.

[0018] Compared with the prior art, the heat exchange device provided by this utility model has the following beneficial effects: The structure of this utility model is compact, unlike the large space size of the split structure. It makes full use of the space at the same height of the liquid cooling plate, which can meet the higher heat exchange requirements under low air volume. It eliminates the physical structure of evaporator tube and condenser tube, which saves more space. Under the thermally driven pressure difference, the heat exchanger can form a stable unidirectional circulation inside, and the heat exchange capacity is stable and excellent. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 This is a schematic diagram of the heat exchange device in Embodiment 1 of this utility model;

[0021] Figure 2 This is a partial enlarged view of the heat exchange device in Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the heat exchange device in Embodiment 1 of this utility model;

[0023] Figure 4 This is a schematic diagram of the heat exchange device in Embodiment 2 of this utility model;

[0024] Figure 5 This is a schematic diagram of the heat exchange device in Embodiment 3 of this utility model;

[0025] Figure 6 This is a cross-sectional schematic diagram of the heat exchange device in Embodiment 3 of this utility model;

[0026] Figure 7 This is one of the structural schematic diagrams of the second plate in this utility model;

[0027] Figure 8 This is the second structural schematic diagram of the second plate in this utility model.

[0028] Explanation of reference numerals in the attached drawings: 1. Liquid cooling plate; 11. First plate; 12. Second plate; 13. First cavity; 14. Second cavity; 15a. Turbulence column; 15b. Turbulence fin; 16. Filling pipe; 2. First heat exchanger; 21. First flat tube; 22. First manifold; 23. Heat dissipation fin; 3. Second heat exchanger; 31. Second flat tube; 32. Second manifold; 4. Baffle plate. Detailed Implementation

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0031] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0035] Example 1

[0036] See Figures 1 to 3 This embodiment discloses a heat exchange device, which includes a liquid cooling plate 1 and a first heat exchanger 2.

[0037] The liquid cooling plate 1 is vertically arranged and includes a first plate 11 and a second plate 12 attached to the first plate 11. A first cavity 13 is formed between the first plate 11 and the second plate 12. The first cavity 13 is filled with phase change refrigerant. A filling pipe 16 is provided on the first plate 11 to inject the phase change refrigerant into the first cavity 13. The heat source is located in the lower part of the first cavity 13, attached to the second plate 12. This is also the main heat source concentration area for the entire liquid cooling plate 1. A turbulence-inducing element is provided in the lower part of the first cavity 13 to increase the contact area between the liquid cooling plate 1 and the phase change refrigerant in the first cavity 13.

[0038] See appendix Figure 7 The agitation element can be a agitation column 15a disposed on the second plate 12, and the cross-sectional shape of the agitation column 15a can be one or more of the following: circular, elliptical, or polygonal. (See appendix) Figure 8 The turbulence-inducing element can also be a turbulence-inducing fin 15b welded to the second plate 12. The turbulence-inducing fin 15b can be one or more of the following forms: staggered teeth, wavy teeth, and V-shaped teeth. For those skilled in the art, the cross-sectional shape and size of the turbulence-inducing column 15a can also be of various forms, not limited to a specific shape, and the specific form depends on the actual needs.

[0039] The first heat exchanger 2 includes multiple first flat tubes 21 and first manifolds 22. The first flat tubes 21 are mounted on the first plate 11. The first flat tubes 21 and the liquid cooling plate 1 can be integrally brazed in the furnace, eliminating the complex assembly process and saving manpower and material costs. The first flat tubes 21 have multiple microchannels arranged horizontally inside. One end of the microchannel is connected to the upper part of the first cavity 13, and the other end of the microchannel is connected to the first manifolds 22.

[0040] See appendix Figure 3 The width of the first flat tube 21 is set vertically, and the phase change refrigerant at least submerges the lowest microchannel. Taking a single first flat tube 21 as an example, the microchannels in the upper part of the first flat tube 21 serve as a condenser, and the microchannels in the lower part of the first flat tube 21 serve as a return pipe. For those skilled in the art, the liquid level of the phase change refrigerant only needs to ensure sufficient heat exchange area for heat dissipation; there are no specific requirements for the specific liquid level of the refrigerant.

[0041] See appendix Figure 2 A heat dissipation fin 23 is provided between two adjacent first flat tubes 21, and the heat dissipation fin 23 covers at least the upper part of the first flat tube 21. Preferably, the heat dissipation fin 23 is a full-height fin, which can further subcool the phase change refrigerant in the lower part of the first flat tube 21, thereby improving the heat dissipation capacity of the heat exchange device.

[0042] The heat exchange device also includes a cooling fan, which guides airflow through the heat dissipation fins 23 to dissipate heat from the first flat tube 21 and improve the heat exchange performance of the heat exchange device.

[0043] When the heat exchange device is working, the phase change refrigerant is located in the lower part of the first cavity 13. The phase change refrigerant absorbs heat from the outside and changes from liquid refrigerant to gaseous refrigerant. The gaseous refrigerant rises to the upper part of the first cavity 13 and condenses into liquid refrigerant through the microchannel in the upper part of the first flat tube 21. It then flows back to the lower part of the first cavity 13 through the microchannel in the lower part of the first manifold 22 and the lower part of the first flat tube 21.

[0044] Example 2

[0045] See appendix Figure 4 The difference between this embodiment and Embodiment 1 is that the width of the first flat tube 21 is set horizontally, and the phase change refrigerant at least submerges the lowest layer of the first flat tube 21. The first flat tube 21 in the upper region serves as a condenser, and the first flat tube 21 in the lower region serves as a return pipe. For those skilled in the art, the liquid level of the phase change refrigerant only needs to ensure sufficient heat exchange area for heat dissipation, and there are no specific requirements for the specific liquid level of the refrigerant.

[0046] When the heat exchange device is working, the phase change refrigerant is located in the lower part of the first cavity 13. The phase change refrigerant absorbs heat from the outside and changes from liquid refrigerant to gaseous refrigerant. The gaseous refrigerant rises to the upper part of the first cavity 13 and condenses into liquid refrigerant through the first flat tube 21 in the upper part of the cavity. It then flows back to the lower part of the first cavity 13 through the first manifold 22 and the first flat tube 21 in the upper part of the cavity.

[0047] Example 3

[0048] For applications with multiple heat sources, this embodiment, based on Embodiment 1 or Embodiment 2, incorporates a multi-cavity design to further improve space utilization and enhance the product's heat exchange capacity. (See appendix.) Figure 5 This embodiment discloses a heat exchange device, which includes a liquid cooling plate 1, a first heat exchanger 2, and a second heat exchanger 3.

[0049] The liquid cooling plate 1 is vertically arranged and includes a first plate 11 and a second plate 12 attached to the first plate 11. A first cavity 13 is formed between the first plate 11 and the second plate 12. The first cavity 13 is filled with phase change refrigerant. At least two filling pipes 16 are provided on the first plate 11 to inject phase change refrigerant into the first cavity 13 and the second cavity 14, respectively. The heat source is located in the lower part of the first cavity 13, attached to the second plate 12, which is also the main heat source concentration area for the entire liquid cooling plate 1. A turbulence-inducing element is provided in the lower part of the first cavity 13 to increase the contact area between the liquid cooling plate 1 and the phase change refrigerant in the first cavity 13.

[0050] The first heat exchanger 2 includes multiple first flat tubes 21 and first manifolds 22. The first flat tubes 21 are disposed on the first plate 11. The first flat tubes 21 have multiple microchannels arranged in a horizontal direction inside. One end of the microchannel is connected to the upper part of the first cavity 13, and the other end of the microchannel is connected to the first manifold 22.

[0051] The second heat exchanger 3 includes multiple second flat tubes 31 and second manifolds 32. The second flat tubes 31 are disposed on the first plate 11. The interior of the second flat tubes 31 is provided with multiple microchannels arranged in the horizontal direction. One end of the microchannel is connected to the upper part of the second cavity 14, and the other end of the microchannel is connected to the second manifolds 32.

[0052] When the heat exchanger is in operation, the phase change refrigerant is located in the lower part of the first chamber 13 and the lower part of the second chamber 14. The phase change refrigerant in the first chamber 13 absorbs external heat, changing from liquid refrigerant to gaseous refrigerant. The gaseous refrigerant rises to the upper part of the first chamber 13 and condenses into liquid refrigerant through the first flat tube 21. It then flows back to the lower part of the first chamber 13 through the first manifold 22 and the first flat tube 21. Similarly, the phase change refrigerant in the second chamber 14 absorbs external heat, changing from liquid refrigerant to gaseous refrigerant. The gaseous refrigerant rises to the upper part of the second chamber 14 and condenses into liquid refrigerant through the second flat tube 31. It then flows back to the lower part of the second chamber 14 through the second manifold 32 and the second flat tube 31.

[0053] Baffles 4 are provided on both sides of the first heat exchanger 2 and the second heat exchanger 3 to form heat dissipation channels. The cooling fan guides the airflow through the heat dissipation fins 23 of the first heat exchanger 2 and the second heat exchanger 3 in sequence to dissipate heat from the first flat tube 21 and the second flat tube 31, thereby improving the heat exchange performance of the heat exchange device.

[0054] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A heat exchange device, characterized by, include: A liquid cooling plate, wherein the liquid cooling plate is vertically arranged, the liquid cooling plate includes a first plate body and a second plate body attached to the first plate body, a first cavity is formed between the first plate body and the second plate body, and the first cavity is filled with a phase change refrigerant; The first heat exchanger includes a first manifold and a plurality of first flat tubes. The first flat tubes are disposed on the first plate. The first flat tubes have a plurality of microchannels arranged in a horizontal direction inside. One end of the microchannel is connected to the upper part of the first cavity, and the other end of the microchannel is connected to the first manifold. The phase change refrigerant absorbs external heat and changes from liquid refrigerant to gaseous refrigerant. The gaseous refrigerant rises to the upper part of the first cavity and condenses into liquid refrigerant through the first flat tube. It then flows back to the lower part of the first cavity through the first manifold and the first flat tube.

2. The heat exchange device according to claim 1, wherein The width of the first flat tube is set along the vertical direction, and the phase change refrigerant at least submerges the lowest microchannel.

3. The heat exchange device of claim 1, wherein The width of the first flat tube is set along the horizontal direction, and the phase change refrigerant at least submerges the bottommost first flat tube.

4. The heat exchange device according to any one of claims 1 to 3, characterized in that, The second plate is attached to the heat source in the lower part of the first cavity.

5. The heat exchange device of claim 4, wherein A flow-disrupting element is provided in the lower region of the first cavity.

6. The heat exchange device as described in claim 5, characterized in that, The turbulence element is a turbulence column disposed on the second plate, and the cross-sectional shape of the turbulence column is one or more of the following: circular, elliptical, and polygonal.

7. The heat exchange device as described in claim 5, characterized in that, The turbulence element is a turbulence fin welded to the second plate, and the turbulence fin is one or more of the following types of fins: staggered teeth, wavy teeth, and V-shaped teeth.

8. The heat exchange device according to any one of claims 1 to 3, characterized in that, Heat dissipation fins are provided between two adjacent first flat tubes.

9. The heat exchange device as described in claim 8, characterized in that, The heat exchange device also includes a cooling fan that guides airflow through the heat dissipation fins.

10. A heat exchange device, characterized in that, include: A liquid cooling plate, wherein the liquid cooling plate is vertically arranged, the liquid cooling plate includes a first plate body and a second plate body attached to the first plate body, a first cavity and a second cavity are formed between the first plate body and the second plate body, and the first cavity and the second cavity are independent of each other, and both the first cavity and the second cavity are filled with a phase change refrigerant. The first heat exchanger includes a first manifold and a plurality of first flat tubes. The first flat tubes are disposed on the first plate. The first flat tubes have a plurality of microchannels arranged in a horizontal direction inside. One end of the microchannel is connected to the upper part of the first cavity, and the other end of the microchannel is connected to the first manifold. The second heat exchanger includes a second manifold and a plurality of second flat tubes. The second flat tubes are disposed on the first plate. The interior of the second flat tubes is provided with a plurality of microchannels arranged in a horizontal direction. One end of the microchannels is connected to the upper part of the second cavity, and the other end of the microchannels is connected to the second manifold. The phase change refrigerant located in the first cavity absorbs external heat, transforming from a liquid refrigerant into a gaseous refrigerant. The gaseous refrigerant rises to the upper part of the first cavity and condenses into a liquid refrigerant through the first flat tube, then flows back to the lower part of the first cavity through the first manifold and the first flat tube. The phase change refrigerant located in the second cavity absorbs external heat, transforming from a liquid refrigerant into a gaseous refrigerant. The gaseous refrigerant rises to the upper part of the second cavity and condenses into a liquid refrigerant through the second flat tube, then flows back to the lower part of the second cavity through the second manifold and the second flat tube.

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