Evaporation section structure and heat exchanger

Abstract

The utility model relates to an evaporation section structure and a heat exchanger, the evaporation section structure comprises a plate and partition strips, the plate is provided with a containing cavity, and the multiple partition strips are arranged in the containing cavity at intervals in the preset length direction so as to divide the containing cavity into multiple branch cavities arranged side by side; a steam hole communicated with the containing cavity is formed in one end, in the preset height direction, of the plate, a backflow hole communicated with the containing cavity is formed in the other end of the plate, a communication channel communicated with the adjacent branch cavities is formed in the end, close to the backflow hole, of the plate, the power elements and the branch cavities are arranged in a one-to-one correspondence mode, and the power elements are installed between the steam hole and the backflow hole. According to the evaporation section structure and the heat exchanger, the problem that an existing evaporation section cannot meet the requirement for rapid heat dissipation of a power element with the large heating value is solved.

Description

Technical Field

[0001] The present application relates to the technical field of heat pipe heat exchange devices, and in particular to an evaporation section structure and a heat exchanger. Background Art

[0002] Typically, the heat exchanger of a photovoltaic inverter is in the form of a heat pipe, wherein the evaporation section of the heat exchanger is used to directly contact power components (including but not limited to IGBT modules, motors, and chips, etc.) so that the power components can dissipate heat through the working fluid circulation in the evaporation section.

[0003] The evaporation section of the existing heat exchanger is a full-through cavity structure, that is, there is no barrier in the cavity, the liquid working medium in the cavity can flow freely in the cavity, and different power components are arranged inside the cavity structure or attached to the outer surface of the evaporation section.

[0004] With such a configuration, since the liquid working medium in the cavity can flow freely in the cavity, the liquid working medium at different positions can exchange heat freely. Thus, when the total heat generated by all power components is small, the vaporization rate of the liquid working medium in the cavity is slow. However, since the heat generated by each power component is different, that is, some power components have a large heat generated, and some power components have a small heat generated. At this time, the inability of the liquid working medium in the cavity to vaporize quickly will directly affect the heat dissipation effect of the power component with a large heat generated. Utility Model Content

[0005] Based on this, it is necessary to provide an evaporation section structure and a heat exchanger to solve the problem that the existing evaporation section cannot meet the rapid heat dissipation requirements of power components with large heat generation.

[0006] The evaporation section structure provided in the present application includes a plate and a dividing strip, wherein the plate is provided with a receiving cavity, and a plurality of dividing strips are arranged in the receiving cavity at intervals along a preset length direction to divide the receiving cavity into a plurality of branch cavities arranged in parallel. A steam hole connected to the receiving cavity is provided at one end of the plate along a preset height direction, and a reflux hole connected to the receiving cavity is provided at the other end, and a connecting channel connected to adjacent branch cavities is provided at one end of the plate close to the reflux hole. The power element and the branch cavity are arranged in a one-to-one correspondence, and the power element is installed between the steam hole and the reflux hole.

[0007] In one embodiment, the plate includes a base plate and a cover plate, the base plate is provided with a receiving groove, a plurality of dividing strips are arranged in the receiving groove at intervals along a preset length direction to divide the receiving groove into a plurality of branch grooves arranged in parallel, the cover plate is arranged at the opening of the receiving groove, and the cover plate is respectively sealed and connected to the base plate and the plurality of dividing strips to form a plurality of branch cavities arranged in parallel.

[0008] In one embodiment, the two branch grooves are respectively connected to the same steam hole.

[0009] In one embodiment, the partition bar is spaced apart from one end of the connecting channel and the inner wall of the containing groove to form a common channel, and the steam holes are respectively connected to the corresponding two branch grooves through the common channel.

[0010] In one of the embodiments, a conical guide protrusion is provided in the common channel, one end of the guide protrusion is connected to the inner wall of the common channel, and the other end extends toward the steam hole along a preset thickness direction. Along the direction from the base plate to the cover plate, the cross-sectional area of ​​the guide protrusion tends to decrease.

[0011] In one embodiment, a plurality of guide bars are disposed at intervals in the branch groove, and the guide bars extend from one end of the branch groove close to the connecting channel to one end of the branch groove close to the common channel.

[0012] In one embodiment, the partition bar and the inner wall of one side of the accommodating groove are spaced apart to form a connecting channel.

[0013] In one embodiment, the steam hole is disposed on the cover plate and is connected to the corresponding branch groove.

[0014] In one embodiment, the power element is attached to the surface of the board; or, the power element is completely immersed in the branch cavity; or, a part of the power element is immersed in the branch cavity and the other part is exposed outside the board, and the power element and the board are sealed and welded.

[0015] The present application also provides a heat exchanger, which includes the evaporation section structure described in any one of the above embodiments.

[0016] Compared with the prior art, the evaporation section structure and heat exchanger provided in the present application have the steam hole located above the branch cavity and the connecting channel located below the branch cavity during use. Due to the barrier effect of the dividing strip, the working fluid between adjacent branch cavities can only flow slowly through the connecting channel, and when there is liquid working fluid in a branch cavity, under the action of hydraulic pressure, it is difficult for the liquid working fluid in the adjacent branch cavity to enter the above-mentioned branch cavity. Therefore, when the calorific value of the power element corresponding to a branch cavity is large, first, the liquid working fluid in the branch cavity will be rapidly heated and vaporized, and leave the branch cavity through the steam hole. Afterwards, since the liquid working fluid in the branch cavity evaporates in large quantities, and the gas pressure of the steam is much smaller than the hydraulic pressure of the liquid working fluid, the liquid working fluid in the adjacent branch cavity will be quickly replenished into the branch cavity, so that the liquid working fluid in the branch cavity can continue to absorb heat and vaporize.

[0017] From the above, it can be seen that by setting a semi-closed dividing strip, not only can the situation where the liquid working medium in the entire containing chamber is difficult to vaporize and absorb heat be avoided due to the completely free flow of the liquid working medium in the entire containing chamber, but also after the liquid working medium in a branch chamber is consumed, the liquid working medium in the adjacent branch chamber can be quickly replenished to facilitate the continuous absorption of heat and vaporization of the liquid working medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 An exploded view of the evaporation section structure of an embodiment provided in the present application;

[0020] Figure 2 A schematic diagram of a structure in which the evaporation section structure of an embodiment provided in the present application is located on one side of the substrate;

[0021] Figure 3 A schematic diagram of the local structure of the evaporation section of an embodiment provided in this application Figure 1 ;

[0022] Figure 4 A schematic diagram of the local structure of the evaporation section of an embodiment provided in this application Figure 2 .

[0023] Figure numerals: 100, plate; 110, substrate; 120, cover plate; 121, steam hole; 122, reflux hole; 130, receiving groove; 131, branch groove; 132, guide strip; 140, connecting channel; 150, common channel; 151, guide protrusion; 200, dividing strip. DETAILED DESCRIPTION

[0024] Typically, the heat exchanger of a photovoltaic inverter is in the form of a heat pipe, wherein the evaporation section of the heat exchanger is used to directly contact power components (including but not limited to IGBT modules, motors, and chips, etc.) so that the power components can dissipate heat through the working fluid circulation in the evaporation section.

[0025] The evaporation section of the existing heat exchanger is a full-through cavity structure, that is, there is no barrier in the cavity, the liquid working medium in the cavity can flow freely in the cavity, and different power components are arranged inside the cavity structure or attached to the outer surface of the evaporation section.

[0026] With such a configuration, since the liquid working medium in the cavity can flow freely in the cavity, the liquid working medium at different positions can exchange heat freely. Thus, when the total heat generated by all power components is small, the vaporization rate of the liquid working medium in the cavity is slow. However, since the heat generated by each power component is different, that is, some power components have a large heat generated, and some power components have a small heat generated. At this time, the inability of the liquid working medium in the cavity to vaporize quickly will directly affect the heat dissipation effect of the power component with a large heat generated.

[0027] In order to solve the problem that the existing evaporation section cannot meet the rapid heat dissipation requirements of power components with large heat generation, the present application provides an evaporation section structure and a heat exchanger.

[0028] See also Figure 1-Figure 4 The evaporation section structure includes a plate 100 and a dividing strip 200. The plate 100 is provided with a receiving cavity. A plurality of dividing strips 200 are arranged in the receiving cavity at intervals along a preset length direction to divide the receiving cavity into a plurality of branch cavities arranged in parallel. A steam hole 121 connected to the receiving cavity is provided at one end of the plate 100 along a preset height direction. A reflux hole 122 connected to the receiving cavity is provided at the other end of the plate 100 along a preset height direction. In addition, a connecting channel 140 connecting adjacent branch cavities is provided at one end of the plate 100 close to the reflux hole 122. The power element (not shown) and the branch cavity are arranged one by one, and the power element is installed between the steam hole 121 and the reflux hole 122.

[0029] It should be noted that the preset length direction is the length direction of the plate 100, the preset height direction is the height direction of the plate 100, the preset thickness direction is the thickness direction of the plate 100, and the preset length direction, the preset height direction and the preset thickness direction are perpendicular to each other.

[0030] During use, the steam hole 121 is located above the branch cavity, and the connecting channel 140 is located below the branch cavity. Due to the barrier effect of the dividing strip 200, the working fluid between adjacent branch cavities can only flow slowly through the connecting channel 140, and when there is liquid working fluid in a branch cavity, under the action of hydraulic pressure, it is difficult for the liquid working fluid in its adjacent branch cavity to enter the above-mentioned branch cavity. Therefore, when the heat generation of the power component corresponding to a branch cavity is large, first, the liquid working fluid in the branch cavity will be quickly heated and vaporized, and leave the branch cavity through the steam hole 121. Afterwards, since the liquid working fluid in the branch cavity evaporates in large quantities, and the gas pressure of the steam is much smaller than the hydraulic pressure of the liquid working fluid, the liquid working fluid in the adjacent branch cavity will be quickly replenished into the branch cavity, so that the liquid working fluid in the branch cavity can continue to absorb heat and vaporize.

[0031] From the above, it can be seen that by setting a semi-enclosed dividing strip 200, not only can the situation where the liquid working medium in the entire containing chamber is difficult to vaporize and absorb heat be avoided due to the completely free flow of the liquid working medium in the entire containing chamber, but also after the liquid working medium in a branch chamber is consumed, the liquid working medium in the adjacent branch chamber can be quickly replenished to facilitate the continuous absorption of heat and vaporization of the liquid working medium.

[0032] Furthermore, the evaporation section structure provided in the present application is mainly used for the evaporation of the working fluid by heat and the reflux of the liquid working fluid, thereby reducing the rest of the plate 100 to achieve miniaturization and lightness of the evaporation section structure.

[0033] In one embodiment, the volume of the branch cavity is proportional to the heat dissipation of the power element, so as to better dissipate heat of the power element.

[0034] It should be noted that, in one embodiment, the power element is attached to the surface of the board 100 to reduce the difficulty of assembling the power element.

[0035] In another embodiment, the power element may be completely immersed in the branch cavity to improve the heat dissipation effect of the power element.

[0036] In another embodiment, a portion of the power element may be immersed in the branch cavity, and another portion of the power element may be exposed outside the board 100, and the power element and the board 100 may be sealed and welded to achieve a balance between the heat dissipation effect of the power element and the difficulty of installation.

[0037] Embodiment 1

[0038] In one embodiment, if Figure 1 and Figure 2 As shown, the plate 100 includes a base plate 110 and a cover plate 120. The base plate 110 is provided with a receiving groove 130. A plurality of dividing strips 200 are arranged in the receiving groove 130 at intervals along a preset length direction to divide the receiving groove 130 into a plurality of branch grooves 131 arranged in parallel. The cover plate 120 is covered at the opening of the receiving groove 130 and is respectively sealed and connected with the base plate 110 and the plurality of dividing strips 200 to form a plurality of branch cavities arranged in parallel.

[0039] Such an arrangement greatly reduces the difficulty of processing the accommodating cavity and each branch cavity.

[0040] Specifically, in one embodiment, the cover plate 120 is detachably connected to the base plate 110 via fasteners.

[0041] But not limited thereto, in other embodiments, the cover plate 120 may also be seal-welded to the substrate 110 .

[0042] Further, in one embodiment, if Figure 1 and Figure 2As shown, the partition bar 200 and the base plate 110 are integrally formed.

[0043] Specifically, the required branch grooves 131 and the connecting channels 140 can be processed on a whole plate by turning or laser melting, and the branch grooves 131 and the connecting channels 140 can also be processed by 3D printing.

[0044] In another embodiment, the partition bar 200 may also be sealed and welded to the substrate 110 .

[0045] In one embodiment, if Figure 1 As shown, the steam hole 121 is disposed on the cover plate 120 and communicates with the corresponding branch groove 131 .

[0046] Such a configuration is conducive to welding a steam pipe for connecting the steam hole 121 at the cover plate 120 .

[0047] In another embodiment, the steam hole 121 may also be disposed on the substrate 110 .

[0048] It should be noted that the reflux hole 122 is also disposed on the cover plate 120 and is connected to the branch groove 131 through the connecting channel 140 .

[0049] In one embodiment, if Figure 1 and Figure 2 As shown, the partition bar 200 and the inner wall of one side of the accommodating groove 130 are spaced apart to form a connecting channel 140 .

[0050] Such an arrangement greatly reduces the difficulty of processing the communication channel 140 .

[0051] In another embodiment, the connecting channel 140 may be formed by turning or drilling on the partition bar 200 .

[0052] In one embodiment, if Figure 1 and Figure 2 As shown, two adjacent branch grooves 131 are respectively connected to the same steam hole 121 .

[0053] It should be noted that the same steam hole 121 is connected to at most two branch grooves 131 .

[0054] Such an arrangement can, on the one hand, reduce the number of steam holes 121 and thus reduce the number of corresponding pipelines, and on the other hand, can also keep the gas pressure in each steam hole 121 as consistent as possible, that is, make the gaseous working medium evenly distributed.

[0055] It should be noted that when the number of the branch grooves 131 is an odd number, the middle branch groove 131 can be independently provided, and the other branch grooves 131 can share one steam hole 121 in pairs.

[0056] Further, in one embodiment, if Figure 1 , Figure 2 and Figure 4 As shown, one end of the partition bar 200 away from the connecting channel 140 is spaced apart from the inner wall of the containing groove 130 to form a common channel 150 , and the steam holes 121 are respectively connected to the corresponding two branch grooves 131 through the common channel 150 .

[0057] Such a configuration is conducive to the gaseous working medium in the two branch grooves 131 to be quickly collected into the corresponding steam holes 121 .

[0058] However, the invention is not limited thereto. In other embodiments, the steam hole 121 may directly cross the partition bar 200 and communicate with the corresponding two branch grooves 131 .

[0059] Furthermore, in one embodiment, if Figure 1-Figure 4 As shown, a conical guide protrusion 151 is provided in the common channel 150, one end of the guide protrusion 151 is connected to the inner wall of the common channel 150, and the other end extends toward the steam hole 121 along a preset thickness direction, and along the direction from the substrate 110 to the cover plate 120, the cross-sectional area of ​​the guide protrusion 151 tends to decrease.

[0060] It should be noted that, in this embodiment, the preset thickness direction is the arrangement direction of the cover plate 120 and the substrate 110 .

[0061] With such arrangement, when the gaseous working medium corresponding to the branch groove 131 enters the common channel 150, under the guiding effect of the guide protrusion 151, the gaseous working medium can change its flow direction along the outer wall of the guide protrusion 151 and flow toward the steam hole 121, that is, the guide protrusion 151 can prevent the two gaseous working mediums from directly colliding and generating turbulence.

[0062] In one embodiment, if Figure 1 and Figure 2 As shown, the connecting portion between the branch groove 131 and the common channel 150 is in an arc-shaped transition to reduce the flow resistance of the gaseous working medium.

[0063] In one embodiment, if Figure 1 , Figure 2 and Figure 4 As shown, a plurality of spaced guide bars 132 are provided in the branch groove 131. The guide bars 132 extend from one end of the branch groove 131 close to the connecting channel 140 to one end of the branch groove 131 close to the common channel 150. The connecting channel 140 can be connected to the steam hole 121 through the gaps between the plurality of adjacent guide bars 132 respectively.

[0064] Compared with the design of the flow channel with staggered vertical and horizontal spacing, the liquid working medium will not impact each other when flowing in the branch groove 131, resulting in increased flow resistance, thereby improving the circulation efficiency of the working medium.

[0065] Embodiment 2

[0066] In one embodiment, the plate 100 is an integrally formed part, and the branch cavity and the connecting channel 140 are processed into the plate 100 by 3D printing.

[0067] The present application also provides a heat exchanger, which includes the evaporation section structure described in any one of the above embodiments.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

[0070] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0073] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0075] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

Claims

1. An evaporation section structure, characterized in that: The invention comprises a plate (100) and a dividing strip (200), wherein the plate (100) is provided with a receiving cavity, and a plurality of the dividing strips (200) are arranged in the receiving cavity at intervals along a preset length direction so as to divide the receiving cavity into a plurality of branch cavities arranged in parallel, wherein one end of the plate (100) along a preset height direction is provided with a steam hole (121) connected to the receiving cavity, and the other end is provided with a reflux hole (122) connected to the receiving cavity, and an end of the plate (100) close to the reflux hole (122) is provided with a connecting channel (140) connected to adjacent branch cavities, and power elements and the branch cavities are arranged in a one-to-one correspondence, and the power elements are installed between the steam hole (121) and the reflux hole (122).

2. The evaporation section structure according to claim 1, characterized in that: The plate member (100) comprises a base plate (110) and a cover plate (120); the base plate (110) is provided with a receiving groove (130); a plurality of the dividing strips (200) are arranged in the receiving groove (130) at intervals along a preset length direction so as to divide the receiving groove (130) into a plurality of branch grooves (131) arranged in parallel; the cover plate (120) is arranged to cover the opening of the receiving groove (130); the cover plate (120) is respectively sealed and connected to the base plate (110) and the plurality of the dividing strips (200) so as to form a plurality of branch cavities arranged in parallel.

3. The evaporation section structure according to claim 2, characterized in that: The two branch grooves (131) are respectively connected to the same steam hole (121).

4. The evaporation section structure according to claim 3, characterized in that: The dividing strip (200) is spaced apart from one end of the connecting channel (140) and the inner wall of the containing groove (130) to form a common channel (150), and the steam holes (121) are respectively connected to the corresponding two branch grooves (131) through the common channel (150).

5. The evaporation section structure according to claim 4, characterized in that: A conical flow-guiding protrusion (151) is provided in the common channel (150); one end of the flow-guiding protrusion (151) is connected to the inner wall of the common channel (150), and the other end extends toward the steam hole (121) along a preset thickness direction; and along the direction from the base plate (110) to the cover plate (120), the cross-sectional area of ​​the flow-guiding protrusion (151) tends to decrease.

6. The evaporation section structure according to claim 4, characterized in that: A plurality of guide bars (132) arranged at intervals are provided in the branch groove (131), and the guide bars (132) extend from one end of the branch groove (131) close to the connecting channel (140) to one end of the branch groove (131) close to the common channel (150).

7. The evaporation section structure according to claim 2, characterized in that: The partition bar (200) and the inner wall of one side of the accommodating groove (130) are spaced apart to form the communicating channel (140).

8. The evaporation section structure according to claim 2, characterized in that: The steam hole (121) is arranged on the cover plate (120) and is connected to the corresponding branch groove (131).

9. The evaporation section structure according to claim 1, characterized in that: The power element is attached to the surface of the plate (100); Alternatively, the power components are all immersed in the branch cavity; Alternatively, a portion of the power element is immersed in the branch cavity, and another portion is exposed outside the plate (100), and the power element and the plate (100) are sealed and welded.

10. A heat exchanger, characterized in that: It comprises the evaporation section structure according to any one of claims 1 to claim 9.

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