High-efficiency phase-change heat exchange integrated radiator and high-power heat dissipation module

Abstract

The utility model discloses a high-efficiency phase-change heat exchange integrated radiator and a high-power heat dissipation module. The high-efficiency phase-change heat exchange integrated radiator is mainly composed of a phase-change pool boiler, a phase-change condenser, a micro-channel phase-change framework, a micro-channel phase-change component and a heat dissipation component. A gas-liquid collection cavity and a liquid boiling cavity are formed in the phase change pool boiler, a gas condensation cavity is formed in the phase change condenser, and through heat exchange between ambient air and the gas condensation cavity, a vaporized phase change cooling working medium in the phase change pool boiler is condensed and flows back to the liquid boiling cavity again. And then heat exchange with the power module is carried out on the heat exchange outer surface of the phase change pool boiler to complete heat dissipation. And a plurality of high-efficiency phase-change heat exchange integrated radiators are combined together to form a high-power heat dissipation module. According to the utility model, the characteristics of the phase change cooling working medium are fully exerted, the heat exchange efficiency is improved, the high-power heat dissipation requirement of the power module is met, the integrated structure is more compact, and the volume ratio is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of radiators, in particular to a high-efficiency phase-change heat dissipation integrated radiator and a high-power heat dissipation module. Background Art

[0002] With the dual carbon goals in place, the deployment of new energy is accelerating. As a key enabler for new energy grid integration, the large-scale application of energy storage technology has become a key driver of the green energy transition. The power conversion system for energy storage (PCS) is a key component in energy storage systems, responsible for bidirectional energy conversion between storage batteries and the grid. The main functions of a PCS include controlling battery charging and discharging, performing AC / DC conversion, and supplying AC loads in the absence of a grid.

[0003] The traditional thermal solution for IGBT power modules, the main heat-generating components of PCS, is heat pipe skived-tooth radiators. As high performance, lightweight, miniaturization, and integration of electronic devices have become the mainstream trend in the development of modern electronic equipment, the traditional heat pipe skived-tooth radiator solution can no longer meet the requirements. The liquid cooling solution has the disadvantages of leakage reliability risks and high subsequent maintenance costs. Now it is urgent to develop a new type of radiator to meet the urgent requirements. Summary of the Invention

[0004] The utility model aims to provide a high-efficiency phase-change heat dissipation integrated radiator and a high-power heat dissipation module, which improve the heat dissipation efficiency and meet the heat dissipation requirements of the power module.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] A high-efficiency phase-change heat sink, comprising:

[0007] A phase-change pool boiler, comprising a first surface and a second surface arranged opposite and spaced apart from each other, wherein the enclosed space between the first surface and the second surface forms a gas-liquid collection chamber and a liquid boiling chamber, wherein the gas-liquid collection chamber is located above the liquid boiling chamber, an area on the first surface corresponding to the liquid boiling chamber serves as a heat exchange outer surface in close contact with a heat source, and an area on the second surface corresponding to the gas-liquid collection chamber serves as a gas-liquid collection channel surface, wherein the gas-liquid collection channel surface is provided with a first through hole and a second through hole located above, and the first through hole is located above the second through hole;

[0008] A phase-change condenser, comprising a plurality of gas condensation chambers that are parallel to each other and spaced apart in a straight line, one end of each gas condensation chamber being connected to both the first through hole and the second through hole, and a space between two adjacent gas condensation chambers being connected to the external environment;

[0009] A microchannel phase change skeleton, wherein the microchannel phase change skeleton is installed in the liquid boiling cavity;

[0010] a microchannel phase change component, wherein the microchannel phase change component is installed in the gas condensation chamber;

[0011] The heat dissipation component is installed in the interval between any two gas condensation chambers and is in close contact with the surface of the gas condensation chamber.

[0012] Furthermore, the high-efficiency phase change heat dissipation integrated radiator also includes a plurality of crisscrossing channels, which are arranged in the gas-liquid collecting chamber and the liquid boiling chamber of the phase change pool boiler.

[0013] Furthermore, the inner surface of the phase change pool boiler is provided with a plurality of protrusions distributed at intervals, and a plurality of crisscrossing channels are formed between different protrusions.

[0014] Furthermore, the phase change condenser further includes a communicating cavity, one end of which is communicated with the first through hole and the second through hole, and the other end of which is communicated with all the gas condensation cavities.

[0015] Furthermore, the high-efficiency phase change heat dissipation integrated radiator also includes a steam collecting trough plate, which is installed on one end of the phase change condenser away from the first through hole and the second through hole. A cavity for balancing the pressure difference is formed between the steam collecting trough plate and the phase change condenser, and the cavity is connected to the gas condensation chamber.

[0016] Furthermore, the cross-sectional shapes of the first through hole and the second through hole are square, circular, elliptical or polygonal, and the cross-sectional shapes of the first through hole and the second through hole are the same or different.

[0017] As an option, the gas-liquid collecting chamber and the liquid boiling chamber both extend along the vertical direction, and the inclination angle between the gas condensation chamber and the vertical direction is α, and satisfies 90°<α≤180°.

[0018] As an option, the gas-liquid collection chamber and the liquid boiling chamber both extend along the vertical direction, the inclination angle between the gas condensation chamber and the vertical direction is α, and satisfies 0°<α≤90°, and one end of the gas condensation chamber away from the first through hole and the second through hole is connected to the liquid boiling chamber in the phase change pool boiler through a return liquid pipe.

[0019] As an option, the microchannel phase change skeleton is a heat dissipation fin, machined rib, machined column, powder sintered layer or wire mesh, and the heat dissipation component is a heat dissipation fin, machined rib or machined column. It should be noted that the powder sintered layer is a porous capillary structure formed by high-temperature sintering of metal powder, and the wire mesh refers to a metal wire mesh made of stainless steel, aluminum, copper, etc. through weaving or sintering processes.

[0020] The high-power heat dissipation module includes multiple aforementioned high-efficiency phase change heat exchange integrated radiators, the heat exchange outer surfaces of the multiple high-efficiency phase change heat exchange integrated radiators are distributed in the same plane and the phase change pool boilers of two adjacent high-efficiency phase change heat exchange integrated radiators are bonded to each other.

[0021] As an option, the inclination angles α between the gas-liquid collecting chambers of different high-efficiency phase change heat sinks and the vertical direction are different, or the inclination angles α between the gas-liquid collecting chambers of different high-efficiency phase change heat sinks and the vertical direction are equal.

[0022] Compared with the prior art, the present invention has the following characteristics:

[0023] (1) The phase change pool boiler is used to contact the power module of the heat-generating component, so that the phase change cooling medium filled in the phase change pool boiler absorbs heat and evaporates in the phase change pool boiler, flows into the phase change condenser through the gas-liquid collection chamber, and then dissipates heat and condenses in the gas condensation chamber inside the phase change condenser and flows back to the phase change pool boiler through the gas-liquid collection chamber or the return pipe;

[0024] (2) The heat dissipation component is arranged in the interval between any two gas condensation chambers in the phase change condenser to dissipate the heat released by the condensation of the phase change cooling medium to the heat sink;

[0025] (3) The high-efficiency phase change heat sink forms four cavities including a gas-liquid collection cavity, a liquid boiling cavity, a gas condensation cavity and a cavity for balancing pressure difference. The liquid boiling cavity serves as the boiling area of ​​the phase change pool, the gas-liquid collection cavity serves as the gas-liquid channel area, and the gas condensation cavity is divided into a gas condensation area and a liquid reflux area. After the phase change cooling medium condenses into liquid in the gas condensation area, it quickly flows into the liquid reflux area. The function of the cavity for balancing pressure difference is to redistribute the uncondensed gas in the high-heat channel to other low-heat channels for condensation (due to the inconsistent temperature distribution of multiple gas condensation cavities, some gas condensation cavities will have higher temperatures, namely high-heat channels, while some gas condensation cavities will have lower temperatures, namely low-heat channels, and thus they will be redistributed through the cavity for balancing pressure difference);

[0026] (4) Give full play to the characteristics of phase change cooling medium, circulate efficiently in the high-efficiency phase change heat transfer integrated radiator, and improve heat exchange efficiency;

[0027] (5) The integrated design of phase change pool boiler, phase change condenser, microchannel phase change skeleton, steam collecting trough plate, microchannel phase change component and heat dissipation component makes the overall structure more compact. Multiple high-efficiency phase change heat dissipation integrated heat sinks can be combined arbitrarily to form a high-power heat dissipation module to meet the needs of different usage environments and thus meet the heat dissipation requirements of the power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1This is an exploded diagram of a high-efficiency phase-change heat sink.

[0029] Figure 2 Schematic diagram of the assembly of phase change pool boiler and phase change condenser;

[0030] Figure 3 is a positional relationship diagram of the phase change pool boiler and the phase change condenser when the inclination angle between the gas condensation chamber and the vertical direction is 90°<α≤180°;

[0031] Figure 4 The position diagram of the phase change pool boiler and the phase change condenser when the inclination angle between the gas condensation chamber and the vertical direction is 0°<α≤90°, and the liquid return pipe is included in the figure;

[0032] Figure 5 Schematic diagram of the installation position of the IGBT power module on the heat exchange outer surface of the phase change pool boiler;

[0033] Figure 6 A three-dimensional diagram of a high-power heat dissipation module containing two high-efficiency phase-change heat sinks;

[0034] Figure 7 This is a comparison curve of test data between the high-efficiency phase-change heat sink of the utility model and the traditional heat pipe skived-tooth heat sink;

[0035] Figure 8 A schematic diagram of multiple crisscross channels formed by multiple spaced protrusions on the inner surface of a phase change pool boiler;

[0036] Figure 9 A schematic diagram of a first through hole and a second through hole on the surface of the gas-liquid converging channel;

[0037] Figure 10 for Figure 4 Schematic diagram of the distribution of cavities in a medium and high efficiency phase change heat sink;

[0038] Figure 11 Schematic diagram of the phase change condenser structure;

[0039] Figure 12 An enlarged schematic diagram of the installation positions of the heat dissipation component and the microchannel phase change component in the phase change condenser;

[0040] In the figure: 1-phase change pool boiler, 2-phase change condenser, 3-steam collecting trough plate, 4-microchannel phase change component, 5-heat dissipation component, 6-microchannel phase change skeleton, 7-connecting cavity. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection claimed is not limited to the description.

[0042] like Figures 1 to 4 、 Figure 6 、 Figure 8 、 Figures 9 to 12 As shown, a high-efficiency phase change heat dissipation integrated radiator designed by the present invention is mainly composed of a phase change pool boiler 1, a phase change condenser 2, a microchannel phase change skeleton 6, a steam collecting trough plate 3, a microchannel phase change component 4 and a heat dissipation component 5.

[0043] The phase change pool boiler 1 includes a first surface and a second surface that are arranged relative to each other and spaced apart. The enclosed space between the first surface and the second surface forms a gas-liquid collection chamber and a liquid boiling chamber, wherein the gas-liquid collection chamber is located above the liquid boiling chamber, and the area on the first surface corresponding to the liquid boiling chamber serves as a heat exchange outer surface in close contact with the heat source, and the area on the second surface corresponding to the gas-liquid collection chamber serves as a gas-liquid collection channel surface, and the gas-liquid collection channel surface is provided with a first through hole and a second through hole located above, and the first through hole is located above the second through hole; the phase change condenser 2 includes a plurality of gas condensation chambers that are parallel to each other and spaced apart in a straight line, one end of the gas condensation chamber is connected to the first through hole and the second through hole at the same time, and a heat dissipation component 5 is installed in the interval between two adjacent gas condensation chambers and is in close contact with the surface of the gas condensation chamber; the microchannel phase change skeleton 6 is installed in the liquid boiling chamber; and the microchannel phase change component 4 is installed in the gas condensation chamber. A connecting cavity 7 (such as Figure 11 As shown, the end surface of the phase-change condenser 2 is integrally recessed to form a cavity, which serves to converge and divert gas flows. The connecting cavity 7 is located between the surface of the gas-liquid converging channel and the gas condensation cavity. It is a single cavity, one end of which communicates with the first and second through-holes on the surface of the gas-liquid converging channel, and the other end communicates with all gas condensation cavities. A steam collecting trough plate 3 is mounted on the end of the phase-change condenser 2, away from the first and second through-holes. A cavity for balancing pressure differences is formed between the steam collecting trough plate 3 and the phase-change condenser 2, which communicates with the gas condensation cavity.

[0044] like Figure 8 A plurality of crisscross channels are provided in the gas-liquid collecting chamber and the liquid boiling chamber of the phase change pool boiler 1. These channels are formed by a plurality of spaced-apart protrusions on the inner surface of the phase change pool boiler 1, and a plurality of crisscross channels are formed between different protrusions.

[0045] like Figure 9 The cross-sectional shapes of the first through hole and the second through hole are square, circular, elliptical or polygonal, and the cross-sectional shapes of the first through hole and the second through hole are different. Figure 9 The first through hole is circular and the second through hole is elliptical.

[0046] like Figure 3 , the gas-liquid collection chamber and the liquid boiling chamber both extend in the vertical direction, the inclination angle between the gas condensation chamber and the vertical direction is α, and satisfies 90°<α≤180°. Figure 4 The gas-liquid collecting chamber and the liquid boiling chamber both extend in the vertical direction, the inclination angle between the gas condensation chamber and the vertical direction is α, and satisfies 0°<α≤90°, and one end of the gas condensation chamber away from the first through hole and the second through hole is connected to the liquid boiling chamber in the phase change pool boiler 1 through the return liquid pipe.

[0047] The microchannel phase change skeleton 6 is one of heat dissipation fins, machined ribs, machined columns, powder sintered layers or wire mesh, preferably heat dissipation fins. The heat dissipation component 5 is one of heat dissipation fins, machined ribs or machined columns, preferably heat dissipation fins.

[0048] The working principle of the high-efficiency phase change heat dissipation integrated radiator is: the phase change pool boiler 1 is in contact with the IGBT power module, there is a cavity inside the phase change pool boiler 1, the microchannel phase change skeleton 6 is installed inside the cavity of the phase change pool boiler 1 corresponding to the contact surface of the IGBT power module, the phase change condenser 2 is installed on the surface of the phase change pool boiler 1 away from the contact surface of the IGBT power module, the inner cavity of the phase change condenser 2 is connected to the phase change pool boiler 1 through the gas-liquid collecting cavity at the connection, the microchannel phase change component 4 is installed in the gas condensation cavity of the phase change condenser 2, the heat dissipation component 5 is installed in the interval between any two gas condensation cavities of the phase change condenser 2, the steam collecting trough plate 3 is installed at the other end of the phase change condenser 2, and a circulation channel is formed inside the high-efficiency phase change heat dissipation integrated radiator, and phase change cooling working fluids such as refrigerant, acetone, ammonia and water flow in the circulation channel. After the IGBT power module is powered on and generates heat, the heat is transferred to the phase change pool boiler 1 through contact. The phase change cooling medium in the phase change pool boiler 1 absorbs heat and evaporates into gas, which flows into the phase change condenser 2 through the gas-liquid collection chamber. The external fan provides air volume, blows the phase change condenser 2 and the heat dissipation component 5, and discharges the heat to the heat sink. The phase change condenser 2 is cooled, and the internal gas condenses into liquid, which flows back to the gas-liquid collection chamber through the flow channel and then flows back to the phase change pool boiler 1. This cycle realizes efficient phase change heat cooling for the IGBT power module.

[0049] like Figure 5 and Figure 6 A high-power heat dissipation module is formed by two high-efficiency phase change heat exchange integrated radiators arranged upper and lower. The inclination angle α of the upper high-efficiency phase change heat exchange integrated radiator satisfies 90°<α≤180°, and the inclination angle α of the lower high-efficiency phase change heat exchange integrated radiator satisfies 0°<α≤90°. The phase change pool boiler 1 and the phase change condenser 2 are connected through a return pipe. Six IGBT power modules are distributed on the heat exchange outer surface of the phase change pool boiler 1.

[0050] like Figure 7 Demonstrated adoption Figure 6The test data comparison curves for the high-power cooling module and the skived-tooth heat pipe heat sink show that the IGBT power module temperature using the high-power cooling module is significantly lower than that using the skived-tooth heat pipe heat sink. The test conditions were: six IGBT power modules, each with a power of 1kW, an ambient temperature of 40°C, and six 9238 fans.

[0051] The above embodiments are not intended to limit the protection scope of the present invention. Any deformation, modification or equivalent replacement made on the basis of the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-efficiency phase-change heat sink, characterized in that: include: A phase change pool boiler (1) comprises a first surface and a second surface arranged opposite to each other and spaced apart, wherein a closed space between the first surface and the second surface forms a gas-liquid collection chamber and a liquid boiling chamber, wherein the gas-liquid collection chamber is located above the liquid boiling chamber, an area on the first surface corresponding to the liquid boiling chamber serves as a heat exchange outer surface in close contact with a heat source, and an area on the second surface corresponding to the gas-liquid collection chamber serves as a gas-liquid collection channel surface, a first through hole and a second through hole are provided on the gas-liquid collection channel surface, and the first through hole is located above the second through hole; A phase change condenser (2), the phase change condenser (2) comprising a plurality of gas condensation chambers that are parallel to each other and spaced apart in a straight line, one end of the gas condensation chamber being in communication with both the first through hole and the second through hole, and the space between two adjacent gas condensation chambers being in communication with the external environment; A microchannel phase change skeleton (6), wherein the microchannel phase change skeleton (6) is installed in the liquid boiling cavity; A microchannel phase change component (4), wherein the microchannel phase change component (4) is installed in the gas condensation chamber; A heat dissipation component (5) is installed in the interval between any two gas condensation chambers and is in close contact with the surface of the gas condensation chamber.

2. The high-efficiency phase-change heat sink according to claim 1, characterized in that: It also includes a plurality of crisscross channels, which are arranged in the gas-liquid collecting chamber and the liquid boiling chamber of the phase change pool boiler (1).

3. The high-efficiency phase-change heat sink according to claim 1, characterized in that: The phase change condenser (2) further comprises a communication cavity (7), one end of the communication cavity (7) being in communication with the first through hole and the second through hole, and the other end being in communication with all gas condensation cavities.

4. The high-efficiency phase-change heat sink according to claim 1, characterized in that: It also includes a steam collecting trough plate (3), which is mounted on an end of the phase change condenser (2) away from the first through hole and the second through hole. A cavity for balancing the pressure difference is formed between the steam collecting trough plate (3) and the phase change condenser (2), and the cavity is connected to the gas condensation cavity.

5. The high-efficiency phase-change heat sink according to claim 1, characterized in that: The cross-sectional shapes of the first through hole and the second through hole are square, circular, elliptical or polygonal, and the cross-sectional shapes of the first through hole and the second through hole are the same or different.

6. The high-efficiency phase-change heat sink according to claim 1, characterized in that: The gas-liquid collecting chamber and the liquid boiling chamber both extend along the vertical direction. The inclination angle between the gas condensation chamber and the vertical direction is α, and satisfies 90°<α≤180°.

7. The high-efficiency phase-change heat sink according to claim 1, characterized in that: The gas-liquid collecting chamber and the liquid boiling chamber both extend in the vertical direction, the inclination angle between the gas condensation chamber and the vertical direction is α, and satisfies 0°<α≤90°, and one end of the gas condensation chamber away from the first through hole and the second through hole is connected to the liquid boiling chamber in the phase change pool boiler (1) through a liquid return pipe.

8. The high-efficiency phase-change heat sink according to claim 1, characterized in that: The microchannel phase change skeleton (6) is a heat dissipation fin, a machined rib, a machined column, a powder sintered layer or a wire mesh, and the heat dissipation component (5) is a heat dissipation fin, a machined rib or a machined column.

9. Heat dissipation module, characterized by: The invention comprises a plurality of high-efficiency phase change heat exchange integrated radiators as claimed in claim 1, wherein the heat exchange outer surfaces of the plurality of high-efficiency phase change heat exchange integrated radiators are distributed in the same plane and the phase change pool boilers (1) of two adjacent high-efficiency phase change heat exchange integrated radiators are bonded to each other.

10. The heat dissipation module according to claim 9, characterized in that: The inclination angles α between the gas-liquid collecting chambers of different high-efficiency phase change heat sinks and the vertical direction are different, or the inclination angles α between the gas-liquid collecting chambers of different high-efficiency phase change heat sinks and the vertical direction are equal.

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