Evaporator, thermosyphon heat exchanger, and power conversion device

Abstract

An evaporator, a thermosyphon heat exchanger, and a power conversion device. The evaporator comprises an evaporator body and working medium guide structures arranged in a cavity of the evaporator body; the areas on the inner surface of a first side wall of the evaporator body corresponding to heating points are heated areas, at least part of the working medium guide structures is correspondingly arranged in the heated areas or above the heated areas, each working medium guide structure has a guide surface, and the guide surface extends in a direction away from the corresponding heated area. By means of the present solution, the guide surfaces of the working medium guide structures divert the vaporized working medium toward at least one side away from the heated areas, thereby reducing the situation in which the vaporized working medium that has been vaporized upon heat absorption in the lower areas of the heated areas affects the heat exchange effect of the upper areas of the heated areas during upward flow of the working medium, helping to to further improve the heat dissipation effect of the evaporator on the heating points.

Description

Evaporators, thermosiphon heat exchangers and power conversion equipment

[0001] This application claims priority to Chinese Patent Application No. 2024229185005, filed on November 27, 2024, entitled "Evaporator, Thermosiphon Heat Exchanger and Power Conversion Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of thermosiphon heat exchanger technology, and more specifically, to an evaporator, a thermosiphon heat exchanger, and a power conversion device. Background Technology

[0003] In existing technologies, evaporators are typically used to cool the heat source module. When the heat source module is working, a corresponding heated zone is formed inside the evaporator. Liquid enters at the bottom of the evaporator and exhausts at the top. The evaporator exchanges heat with the high-temperature gas phase in the heated zone through the internal liquid phase, thereby cooling the heat source module. Summary of the Invention

[0004] This application provides an evaporator, a thermosiphon heat exchanger, and a power conversion device to improve the heat dissipation capacity of evaporators in the prior art.

[0005] According to one aspect of this application, an evaporator is provided, including an evaporator body and a working fluid guiding structure disposed within the cavity of the evaporator body. The area of ​​the inner surface of the first sidewall of the evaporator body corresponding to the heating point is a heated zone. The working fluid guiding structure is at least partially disposed within or above the heated zone. The working fluid guiding structure has a guiding surface that extends in a direction away from the heated zone.

[0006] Furthermore, the working fluid guiding structure extends along a direction that has a non-zero angle with the first direction and / or a second direction, and the bottom wall and / or side wall of the working fluid guiding structure downward in the first direction form a guiding surface; wherein, the first direction is parallel to the rising direction of the gaseous working fluid in the evaporator body, and the second direction is parallel to the plane where the first side wall is located and orthogonal to the first direction.

[0007] Furthermore, there are multiple working fluid guiding structures, which are spaced apart along a first direction, and / or spaced apart along a second direction; or, the width of the projection of the working fluid guiding structure onto the horizontal plane along the second direction is greater than or equal to the width of the projection of the heating point onto the horizontal plane along the second direction.

[0008] Furthermore, there are multiple heating points, each corresponding to a heated area on the first sidewall.

[0009] Furthermore, at least one portion of the working fluid guiding structure is located within or above at least two heated zones, wherein the at least two heated zones are distributed along a second direction; or, the working fluid guiding structure is S-shaped along a first direction, separating the plurality of heated zones arranged along the first direction to both sides of the working fluid guiding structure.

[0010] Furthermore, the projections of at least two working fluid guiding structures on the horizontal plane partially overlap.

[0011] Furthermore, the sidewall of the evaporator body between the heat source module and the heated area is the first sidewall. The evaporator also includes a heat-conducting and diffusion rib disposed in the evaporator body. One end of the heat-conducting and diffusion rib is connected to the first sidewall, and the other end of the heat-conducting and diffusion rib extends away from the first sidewall.

[0012] Furthermore, the other end of the heat-conducting and diffusing rib extends to the opposite sidewall to the first sidewall; or, at least one end of the heat-conducting and diffusing rib connected to the first sidewall is located within the heated area; or, at least one heat-conducting and diffusing rib is provided with a plurality of heat-conducting protrusions.

[0013] Furthermore, the evaporator also includes a capillary liquid return structure disposed within the evaporator body. The capillary liquid return structure is disposed on the inner surface of at least one evaporator body including a first sidewall, and / or the outer surface of the heat-conducting diffusion ribs, and / or the surface of the working fluid guiding structure, or the working fluid guiding structure is disposed on the capillary liquid return structure.

[0014] Furthermore, the working fluid guiding structure is disposed on the first sidewall; or, the working fluid guiding structure extends from the edge of the heated zone along a third direction to the second sidewall, or extends to a position spaced apart from the second sidewall, wherein the second sidewall is the sidewall of the evaporator body disposed opposite to the first sidewall, and the third direction is the direction from the outer surface of the first sidewall to the inner surface and perpendicular to the first sidewall; or, the working fluid guiding structure has at least one guiding surface, and the projection of the working fluid guiding structure on the first sidewall is one or more combinations of a triangle, a meandering shape, an inclined straight line, an arc, a V-shape, a round-bottomed bowl shape, and a flat-bottomed bowl shape.

[0015] Furthermore, the surface of the first sidewall has a groove for positioning and mounting a heat source module including a heating point.

[0016] According to another aspect of this application, a thermosiphon heat exchanger is provided, which includes a condenser, a connecting pipe, and the aforementioned evaporator. The condenser is higher than the evaporator. The top of the evaporator body has a gas phase outlet, and the bottom of the evaporator body has a liquid phase inlet. The condenser has a liquid phase outlet and a gas phase inlet. The gas phase inlet is connected to the gas phase outlet through the connecting pipe, and the liquid phase inlet is connected to the liquid phase outlet through the connecting pipe.

[0017] According to another aspect of this application, a power conversion device is provided, the power conversion device including at least one heat source module and the above-mentioned thermosiphon heat exchanger, the heat source module being disposed on the outer surface of the first sidewall of the evaporator, and a heat source module including at least one heating point.

[0018] The present application provides an evaporator, including an evaporator body and a working fluid guiding structure disposed within the cavity of the evaporator body. The area on the inner surface of the first sidewall of the evaporator body corresponding to the heating point is the heated zone. The working fluid guiding structure is at least partially disposed within or above the heated zone. The working fluid guiding structure has a guiding surface that extends away from the heated zone.

[0019] By guiding the vaporized propellant through the working fluid guiding structure, the vaporized propellant is diverted to at least one side away from the heated zone. This reduces the impact of the vaporized propellant, after absorbing heat in the lower part of the heated zone, on the heat exchange effect in the upper part of the heated zone during its ascent. This is beneficial for further improving the heat dissipation effect of the evaporator on the heating point. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative disclosure and description of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 shows a schematic diagram of the structure of an evaporator provided in one of the disclosures of this application;

[0022] Figure 2 shows a cross-sectional view of Figure 1;

[0023] Figure 3 shows a schematic diagram of the structure of the evaporator provided in the third disclosure of this application;

[0024] Figure 4 shows a schematic diagram of the structure of the evaporator provided in the fourth disclosure of this application;

[0025] Figure 5 shows a schematic diagram of the working fluid guiding structure provided in disclosure five of this application;

[0026] Figure 6 shows a schematic diagram of the working fluid guiding structure provided in disclosure 6 of this application;

[0027] Figure 7 shows a schematic diagram of the working fluid guiding structure provided in disclosure 7 of this application;

[0028] Figure 8 shows a schematic diagram of the working fluid guiding structure provided in disclosure 8 of this application;

[0029] Figure 9 shows a schematic diagram of the working fluid guiding structure provided in the ninth disclosure of this application;

[0030] Figure 10 shows a schematic diagram of the working fluid guiding structure provided in disclosure ten of this application;

[0031] Figure 11 shows a schematic diagram of the working fluid guiding structure provided in disclosure eleven of this application;

[0032] Figure 12 shows a schematic diagram of the working fluid guiding structure provided in disclosure 15 of this application;

[0033] Figure 13 shows a schematic diagram of the structure of the evaporator provided in the second disclosure of this application;

[0034] Figure 14 shows a schematic diagram of the structure of the evaporator provided in disclosure 12 of this application;

[0035] Figure 15 shows a schematic diagram of the structure of the evaporator provided in disclosure thirteen of this application;

[0036] Figure 16 shows a schematic diagram of the structure of the evaporator provided in disclosure fourteen of this application;

[0037] Figure 17 shows a schematic diagram of the power conversion device disclosed in this application;

[0038] Figure 18 shows a schematic diagram of the internal structure of Figure 17 from a rear-view perspective;

[0039] Figure 19 shows a schematic diagram of the internal structure of Figure 17 from a side view.

[0040] Figure 20 shows a schematic diagram of the structure of another power conversion device disclosed in this application;

[0041] Figure 21 shows a schematic diagram of the structure of another power conversion device disclosed in this application.

[0042] The above-mentioned figures include the following reference numerals: 10, evaporator; 11, evaporator body; 111, first sidewall; 112, gas phase outlet; 113, liquid phase inlet; 114, second sidewall; 1101, heated zone; 12, capillary return structure; 13, working fluid guiding structure; 1301, guiding surface; 14, heat-conducting diffusion ribs; 141, heat-conducting protrusion; 20, condenser; 30, connecting pipe; 40, power conversion equipment; 41, chassis; 411, first air duct; 412, second air duct; 42, heat source module; 421, heating point; 43, fan; 44, thermosiphon heat exchanger; 45, vent. Detailed Implementation

[0043] The technical solutions disclosed in this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described disclosure is only a part of the disclosure in this application, not all of it. The following description of at least one exemplary disclosure is merely illustrative and is in no way intended to limit this application or its application or use. Based on the disclosures in this application, all other disclosures obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0044] During cooling, the high-temperature gaseous working fluid obtained after evaporation in the lower layer of the heated zone will rise. As the high-temperature gaseous working fluid rises, it will interfere with the heat exchange effect of the liquid working fluid in the upper layer of the heated zone, thus causing the evaporator's heat dissipation capacity and the heat exchange effect on the heat source module to deteriorate.

[0045] As shown in Figures 1 to 16, one of the present disclosures provides an evaporator 10, including an evaporator body 11 and a working fluid guiding structure 13 disposed in the cavity of the evaporator body 11. The evaporator body 11 is a hollow structure with a hollow inner cavity. Specifically, the evaporator body 11 can be a hollow cavity structure formed by a first side wall 111 and a second side wall 114 as two oppositely arranged side walls and surrounded by other side walls.

[0046] The outer surface of the first sidewall 111 of the evaporator body 11 is provided with a heat source module 42 including at least one heating point 421 (i.e., the heat source module 42 in this disclosure includes one or more heating points 421, each heating point 421 corresponding to a heated area 1101 on the first sidewall 111). The heat generated by the heat source module 42 is conducted to the first sidewall 111. The area on the inner surface of the first sidewall 111 of the evaporator body 11 corresponding to the heating point 421 is the heated area 1101, as shown in Figures 2-13. The larger dashed box corresponds to the inner surface area of ​​the first sidewall 111, which is the heated area 1101, and the smaller dashed box corresponds to the heating point 421. The working fluid guiding structure 13 is at least partially disposed within or above the heated area 1101. The working fluid guiding structure 13 has a guiding surface 1301 for stopping and guiding the rising gaseous working fluid inside the evaporator body 11. The guiding surface 1301 extends away from the heated area 1101. It is understandable that the end of the working fluid guiding structure 13 facing the first sidewall 111 can be connected to the inner surface of the first sidewall 111.

[0047] It is understood that, in this disclosure, the inner surface of the first sidewall 111 refers to the surface of the first sidewall 111 facing the second sidewall 114, and similarly, the inner surface of the second sidewall 114 refers to the surface of the second sidewall 114 facing the first sidewall 111. The heat source module 42 may also be disposed on the inner surface of the first sidewall 111.

[0048] For example, the outer surface of the first sidewall 111 is provided with two or more heating points 421 along the first direction from top to bottom, and each heating point 421 corresponds to one or more heated areas 1101. In the prior art, the liquid working fluid located in the lower heating zone 1101 partially vaporizes after being heated. The vaporized high-temperature gaseous working fluid rises under the action of buoyancy and then passes through the upper heating zone 1101. At this time, the high-temperature gaseous working fluid interferes with the heat exchange effect of the liquid working fluid in the upper region during its rise, which leads to a reduction in the heat dissipation capacity of the upper heating zone 1101 on the evaporator. However, in this disclosure, the working fluid guiding structure 13 is disposed on the inner surface of the first side wall 111 of the evaporator body 11. The guiding surface 1301 of the working fluid guiding structure 13 guides the vaporized working fluid to at least one side away from the heating zone 1101 through diversion. This reduces the impact of the vaporized working fluid (i.e., the gaseous working fluid) after heat absorption and vaporization in the lower region of the heating zone 1101 on the heat exchange effect in the upper region of the heating zone 1101 during its rise. This is beneficial to further improve the heat dissipation effect of the evaporator 10 on the heating point 421 and the heat source module 42.

[0049] It is understood that the sidewall of the evaporator body 11, on which the heat source module 42 is disposed on the outer surface, is the first sidewall 111; the heated area 1101 is the projection area of ​​the heating point 421 of the heat source module 42 on the inner surface of the first sidewall 111; or, the heated area 1101 is the first sidewall 111 of the evaporator 10 and the location or area where the internal temperature rises above a certain value when the heating point 421 of the heat source module 42 is working. In practical applications, the projection of the location or area where the temperature rises above a certain value on the first sidewall 111 can be the area after scaling the projection of the heating point 421 of the heat source module 42 on the first sidewall 111 according to a certain ratio. The projection area is shown as the location indicated by the heated area 1101 in the disclosures shown in Figures 5 to 13. It should be noted that when the projection of the heated zone 1101 onto the first side wall 111 is large, the projection of the working fluid guiding structure 13 onto the first side wall 111 will pass through the projection of the heated zone 1101. In this case, the working fluid guiding structure 13 is at least partially disposed within the heated zone 1101. Conversely, when the projection of the heated zone 1101 onto the first side wall 111 is small, the projection of the working fluid guiding structure 13 onto the first side wall 111 will be above the projection of the heated zone 1101 and the two will be separated. In this case, the working fluid guiding structure 13 is at least partially disposed above the heated zone 1101. That is, the arrangement of the working fluid guiding structure 13 will vary according to the actual size of the heated zone 1101.

[0050] Secondly, in this disclosure, as shown in Figures 5, 6, and 9, the working fluid guiding structure 13 extends along a direction having a non-zero angle with the first direction; as shown in Figure 8, the working fluid guiding structure 13 can also extend along a second direction; as shown in Figures 1 and 7, the working fluid guiding structure 13 can also extend simultaneously along both a direction having a non-zero angle with the first direction and the second direction. Further, the working fluid guiding structure 13 can be a strip-shaped plate structure as shown in Figures 1, 6, 7, and 8, or a block structure as shown in Figure 9.

[0051] As shown in Figures 1, 6, 7, 9, 11, and 13, the bottom wall surface of the working fluid guiding structure 13, which is downward along the first direction, is the guide surface 1301. As shown in Figure 10, or, the side wall of the working fluid guiding structure 13, which is inclined relative to the first and second directions, forms the guide surface 1301; or as shown in Figures 8, 14, 15, and 16, the bottom wall surface of the working fluid guiding structure 13, which is perpendicular to the first direction, and the wall surface that is inclined relative to the first and second directions, together form the guide surface 1301 with a flat-bottomed bowl-shaped cross-section; wherein, the first direction is parallel to the rising direction of the gaseous working fluid in the evaporator body 11 (i.e., the height direction of the evaporator body 11 from bottom to top in Figure 1), and the second direction is parallel to the plane where the first side wall 111 is located and orthogonal to the first direction (i.e., the length direction of the evaporator body 11 from the middle to both sides in Figure 1). This configuration facilitates the design and implementation of guiding the gaseous working fluid to either side of the evaporator body 11 along its length, ensuring that the gaseous working fluid below does not affect the heat exchange of the upper heating zone 1101.

[0052] It should be noted that the phrase "the working fluid guiding structure 13 is at least partially disposed within the heated zone 1101" in this disclosure means that the edge of the contact surface between the working fluid guiding structure 13 and the inner surface of the side wall of the evaporator body 11 (in this disclosure, the side wall of the evaporator body 11 is the first side wall 111 where the heat source module 42 is disposed) will pass through the heated zone 1101. At this time, the heated zone 1101 can be divided into upper and lower parts by the working fluid guiding structure 13. "Away from the gaseous working fluid movement path" can be understood as a direction parallel to the second direction or another direction that has a certain angle with both the second and first directions. For example, it can extend obliquely in an inverted V-shape as shown in Figures 1 and 13, or it can extend obliquely in a regular V-shape; of course, it can also extend from the upper left to the lower right as shown in Figure 6, and similarly, it can extend from the upper right to the lower left. The guiding surface 1301 extends away from the heated zone 1101 to guide the rising gaseous working fluid to at least one side, wherein at least one side includes both sides in the length direction of the evaporator body 11 and one side in the thickness direction of the evaporator body 11.

[0053] Furthermore, in a third direction perpendicular to the surface of the first sidewall 111 (the third direction is the direction from the outer surface of the first sidewall 111 to the inner surface and perpendicular to the first sidewall 111, which can also be understood as the thickness direction of the evaporator body 11 in Figure 1), one end of the working fluid guiding structure 13 extends to the first sidewall 111 and is fixed to the inner surface of the first sidewall 111 to achieve the installation and fixation of the working fluid guiding structure 13. The other end of the working fluid guiding structure 13 can be selected to extend to the other sidewall opposite to the first sidewall 111 (i.e., the second sidewall 114) depending on the actual situation. That is, the working fluid guiding structure 13 extends from the edge away from the heated zone 1101 along the third direction to the second sidewall 114, or extends to a position spaced apart from the second sidewall 114. In this disclosure, the other end of the working fluid guiding structure 13 extends partially or entirely to the other side wall (i.e., the second side wall 114) opposite to the first side wall 111, so as to ensure the fixing effect of the working fluid guiding structure 13 and the guiding effect and reliability of guiding the gas phase working fluid to both sides in the length direction.

[0054] Optionally, as shown in FIG13, the other end of the working fluid guiding structure 13 is spaced apart from the second sidewall 114, and the bottom edge or side edge of the working fluid guiding structure 13 facing the second sidewall 114 can also be set as an inclined guiding surface 1301. That is, in the first direction, the height of the end of the working fluid guiding structure 13 that contacts the first sidewall 111 is lower than the height of the end of the working fluid guiding structure 13 facing the second sidewall 114, thereby realizing the guidance of the gaseous working fluid to the region away from the first sidewall 111 in the thickness direction of the evaporator body 11. Combined with the aforementioned guidance of the gaseous working fluid by the working fluid guiding structure 13 in the second direction, the guidance of the gaseous working fluid to at least three sides can be realized, further ensuring the reliability of heat exchange in the upper heating zone 1101.

[0055] Thirdly, there is at least one working fluid guiding structure 13. When there are multiple working fluid guiding structures 13, as shown in Figures 5, 7, 8, 9, and 14, the multiple working fluid guiding structures 13 can be distributed at intervals along the first direction to form a column, or, as shown in Figures 15 and 16, the multiple working fluid guiding structures 13 can be distributed at intervals along the second direction to form a row; or, as shown in Figures 1, 13, 15, and 16, the multiple working fluid guiding structures 13 can form a matrix arrangement of multiple rows and columns.

[0056] Fourthly, in this disclosure, the number of working fluid guiding structures 13 corresponding to each heat source module 42 can be adjusted according to the actual situation. Similarly, the number of heating points 421 included in each heat source module 42 can also be adjusted according to the actual situation. As shown in the disclosures of Figures 6(a), 10(a), and 11(a), multiple heating points 421 of a heat source module 42 are provided with one working fluid guiding structure 13; as shown in the disclosures of Figures 5(a), 7(a), 8(a), and 9(a), multiple heating points 421 of a heat source module 42 are provided with two working fluid guiding structures 13 spaced apart along the first direction; as shown in the disclosures of Figures 1 and 13, a heat source module 42 corresponds to two or more working fluid guiding structures 13, and the multiple working fluid guiding structures 13 are spaced apart along the first direction and the second direction. Similarly, as shown in Figures 5(b), 6(b), 7(b), 8(b), 9(b), and 10(b), each heat source module 42 includes only one heating point 421, meaning that the heat source module 42 itself is a heating point 421. One working fluid guiding structure 13 can correspond to multiple heat source modules 42. These multiple heating points 421 are distributed sequentially and at intervals along the second direction, or sequentially and at intervals along the first direction, or simultaneously distributed in a matrix along both the second and first directions as shown in Figure 5. This arrangement allows for the placement of the guiding surface 1301 at different positions, ensuring the guidance of the rising gaseous working fluid at different positions in the heated zone 1101 and guaranteeing the reliability of the gaseous working fluid guidance and dispersion. Furthermore, to improve adaptability under various operating conditions, as shown in Figure 14, each heat source module 42 includes multiple heating points 421. All heating points 421 of the multiple heat source modules 42 are simultaneously distributed along the second direction and the first direction matrix. The working fluid guiding structure 13 can be located above the multiple heating points 421 in the same row along the second direction, or pass through the heating zone 1101 corresponding to the multiple heating points 421 in the same row. Alternatively, as shown in Figure 6(b), each heating point 421 in Figure 6(b) is equivalent to a heat source module 42, and the working fluid guiding structure 13 is located above two or more adjacent rows of heat source modules 42.

[0057] It should be noted that, typically, a heat source module 42, such as an IGBT (Insulated Gate Bipolar Transistor) module, may include only one chip, that is, one heat source 421. In this case, one heat source 421 is equivalent to one heat source module 42. However, as the integration density of the heat source module 42 increases, two or more chips can be set in one heat source module 42. Then, each chip corresponds to a heated area 1101. That is, a heat source module 42 has multiple heated areas 1101. The multiple heated areas 1101 can be distributed at intervals along a first direction, at intervals along a second direction, or at intervals along both directions simultaneously. The working fluid guiding structure 13 can be set above the lowest heating point 421 (heated area 1101) in the heat source module 42, or it can be set through the heated area 1101 corresponding to the heating point 421, as shown in Figures 5 to 10. The specific setting method of the working fluid guiding structure 13 is the same as the setting method of the working fluid guiding structure 13 relative to the heat source module 42. The only difference is that the heating point 421 is used instead of the heat source module 42 in this disclosure.

[0058] It is understood that there are two or more in this application. One or more heat source modules 42 or their corresponding heated areas 1101 are not provided with working fluid guiding structures 13, or one or more heating points 421 or their corresponding heated areas 1101 are not provided with working fluid guiding structures 13.

[0059] At least one working fluid guiding structure 13 is located within or above at least two heated zones 1101, wherein the at least two heated zones 1101 are distributed along a second direction. This arrangement ensures that any one working fluid guiding structure 13 can correspond to at least two heated zones 1101 and stop and guide the rising gaseous working fluid within the at least two heated zones 1101, thereby improving the utilization rate of the working fluid guiding structure 13. It is understood that in the disclosures shown in Figures 5(a) to 10(a), the at least two heated zones 1101 may belong to the same heat source module 42; and in the disclosures shown in Figures 5(b) to 10(b) and Figures 11 to 16, the at least two heated zones 1101 may belong to different heat source modules 42.

[0060] Fifthly, to avoid the influence of the gaseous working fluid generated by the lower heating point 421 or heat source module 42 on the upper heating point 421 or heat source module 42, and thus ensure the reliability of guiding the gaseous working fluid, the opposite ends of at least two working fluid guiding structures 13 overlap in their projection portions toward the horizontal plane along the first direction. Specifically, as shown in Figure 14, when there are multiple working fluid guiding structures 13, taking one working fluid guiding structure 13 as an example, in the second direction, the farthest ends of the working fluid guiding structure 13 extend above the two heating points 421 that are farthest apart. The farthest ends of each working fluid guiding structure 13 extend to both sides of the two heating points 421 or heat source module 42 that are farthest apart. The projection portions or all of each working fluid guiding structure 13 onto the horizontal plane along the first direction overlap.

[0061] Alternatively, the width of the projection of the working fluid guide structure 13 onto the horizontal plane along the second direction is greater than or equal to the width of the projection of the heating point 421 onto the horizontal plane along the second direction. As shown in Figure 5, the projection of the upper working fluid guide structure 13 onto the horizontal plane along the first direction is within the range of the projection of the upper working fluid guide structure 13 onto the horizontal plane along the first direction. As shown in Figure 5, the projection of the upper working fluid guide structure 13 onto the horizontal plane along the first direction is within the range of the projection of the lower working fluid guide structure 13 onto the horizontal plane along the first direction; that is, from top to bottom, the width of each working fluid guide structure 13 along the second direction can gradually decrease. As shown in Figure 13, multiple working fluid guiding structures 13 form two columns, left and right. Each column extends up and down along the first direction. The right end of the working fluid guiding structure 13 in the left column is located above or below the left end of the working fluid guiding structure 13 in the right column. Thus, when the right end of the working fluid guiding structure 13 in the left column is projected onto the horizontal plane along the first direction, the projection of that end falls within the projection range of the working fluid guiding structure 13 in the right column along the horizontal plane. Similarly, when the left end of the working fluid guiding structure 13 in the right column is projected onto the horizontal plane along the first direction, the projection of that end falls within the projection range of the working fluid guiding structure 13 in the left column along the horizontal plane.

[0062] Optionally, the overlapping position of the multiple working fluid guiding structures 13 is mainly in the middle of the cavity of the evaporator body 11. This setting ensures that the rising gaseous working fluid will be stopped and guided, avoiding the formation of gaps extending along the first direction between the multiple working fluid guiding structures 13, which would lead to a deterioration in the heat exchange effect of the upper heating zone 1101 of the gap. This ensures the guiding effect of the guiding surface 1301 on the gaseous working fluid and avoids the situation where the guiding surface 1301 is ineffective.

[0063] Furthermore, by extending the length and height of the working fluid guiding structure 13 in the oblique direction (the direction corresponding to the angle between the first direction and the second direction), the gaseous working fluid can be completely discharged from the heated zone 1101, thus ensuring the heat exchange effect of the upper heated zone 1101.

[0064] Furthermore, when there is only one working fluid guiding structure 13, as shown in Figures 6, 9 and 11, in the first direction (height direction), the end of the working fluid guiding structure 13 with the lowest height can extend to the height of the lowest heating point 421, and similarly, the end of the working fluid guiding structure 13 with the highest height can extend to the height of the highest heating point 421.

[0065] Similarly, as shown in Figures 14, 15 and 16, in the second direction (width direction), the working fluid guiding structure 13 can extend to the left of the leftmost heating point 421 along the first direction at one end, and similarly, the working fluid guiding structure 13 can extend to the right of the rightmost heating point 421 along the first direction at one end.

[0066] When there are multiple working fluid guiding structures 13, in the first direction, the two ends of any working fluid guiding structure 13 that are furthest apart extend to at least the two heat points 421 located on both sides of it that are closest to each other. The two ends of the multiple working fluid guiding structures 13 that are furthest apart extend to the two heat points 421 that are furthest apart. At least some of the working fluid guiding structures 13 partially overlap in the first direction. This arrangement helps to further ensure the extraction effect of the gaseous working fluid.

[0067] It should be noted that the phrase "when there is only one working fluid guiding structure 13" in this disclosure includes both the case where one heat source module 42 or one heating point 421 corresponds to one working fluid guiding structure 13, and the case where multiple heat source modules 42 or multiple heating points 421 correspond to the same working fluid guiding structure 13.

[0068] The working fluid guiding structure 13 has at least one guiding surface 1301. The projection of the working fluid guiding structure 13 onto the first sidewall 111 can be one or more combinations of a triangle (as shown in Figure 9), a meandering shape (as shown in Figure 10), an inclined straight line shape (as shown in Figure 11), an arc shape (as shown in Figures 1, 6, and 13), a V-shape (as shown in Figure 5), a round-bottomed bowl shape (as shown in Figure 7), and a flat-bottomed bowl shape (as shown in Figures 8, 14, 15, and 16). It is understood that the shape of the projection of the working fluid guiding structure 13 onto the first sidewall 111 is not limited to the shapes described above. This design allows for adaptation of the working fluid guiding structure 13 to actual conditions, thereby improving the guiding effect on the gaseous working fluid.

[0069] Taking the first disclosure shown in Figure 1 as an example, a heat source module 42 has three rows of heating points 421 in the first direction, and each row has at least two heating points 421 spaced apart along the second direction. There are four working fluid guiding structures 13, spaced apart in both the first and second directions, arranged in a 2x2 pattern. Two columns of working fluid guiding structures 13 in the same row are arranged in an inverted V-shape. The projection of each working fluid guiding structure 13 onto the vertical plane formed by the first and second directions is a rising arc-shaped strip. At least one working fluid guiding structure 13 protrudes from both ends of the corresponding column of heating points 421 in the second direction. The projection of the heating points 421 in the right column of Figure 1 onto the horizontal plane (the plane defined by the second and third directions) is located within the right column. The projection range of the working fluid guiding structure 13 on the horizontal plane is within this range.

[0070] Above the heating points 421 in all rows except the top one, a working fluid guiding structure 13 can be provided. The guide surface 1301 formed at the bottom of the working fluid guiding structure 13 is an arc-shaped surface. The shape of the working fluid guiding structure 13 in this disclosure is easy to process and facilitates the distribution and installation according to the distribution of the heating points 421 to ensure the guiding effect on the gaseous working fluid.

[0071] Furthermore, in order to improve the guiding effect, each working fluid guiding structure 13 extends to the adjacent row of heating points 421 at both ends in the first direction. For example, taking the right column of working fluid guiding structures 13 in Figure 1 as an example, the left end of the working fluid guiding structure 13 on the bottom row of heating points 421 is located above the bottom row of heating points 421, and the right end of the working fluid guiding structure 13 is located at the height of the heating points 421 in the middle row. Moreover, the height of the right end of the working fluid guiding structure 13 in the first direction is higher than that of the left end.

[0072] Of course, it is understandable that a working fluid guiding structure 13 is not provided above one or more heat source modules 42 or heat source points 421 that have low heat generation or are less affected by the heat source module or heat source point 421 below.

[0073] Taking the fifth disclosure shown in Figure 5 as an example, a heat source module 42 has 3 rows of heating points 421 in the first direction, and each row has 2 heating points 421 distributed at high and low intervals along the second direction. There are 2 working fluid guiding structures 13, which are arranged at intervals along the first direction. The working fluid guiding structure 13 is a V-shaped strip plate structure.

[0074] Two working fluid guiding structures 13 are respectively disposed in the area between two adjacent rows of heating points 421. The guide surface 1301 formed at the bottom of the working fluid guiding structure 13 is a positive V-shaped plane below the two intersection points. The two ends of the working fluid guiding structure 13 in the first direction extend to the height of the previous row of heating points 421, and the two ends of the working fluid guiding structure 13 in the second direction protrude from two rows of heating points 421. The shape of the working fluid guiding structure 13 in this disclosure facilitates the simultaneous formation of two guide surfaces 1301, and the dimensions of the guide surfaces 1301 in the second direction can be machined by adjusting the dimensions of the working fluid guiding structure 13 in the second direction, which facilitates the complete guidance of the rising gaseous working fluid to both sides of the heated area 1101 in the second direction by the guide surfaces 1301.

[0075] In practical applications, in order to adapt more flexibly to different working conditions, the dimensions of each working medium guide structure 13 can be the same or different. For example, the width of the upper working medium guide structure 13 in the second direction is smaller than the width of the lower working medium guide structure 13 in the second direction, or the width of the upper working medium guide structure 13 in the second direction is greater than the width of the lower working medium guide structure 13 in the second direction.

[0076] Taking the sixth disclosure shown in Figure 6 as an example, a heat source module 42 has 6 heating points 421, which are distributed above and below the working fluid guiding structure 13. The working fluid guiding structure 13 is a strip-shaped plate structure with a projected upward arc shape, located between the two rows of heating points 421. Its two ends in the first direction extend to the two farthest heating points 421 in the first direction, and its two ends in the second direction extend to the two farthest heating points 421 in the second direction. The guide surface 1301 formed at the bottom of the working fluid guiding structure 13 is an arc-shaped surface.

[0077] The working fluid guiding structure 13 in this disclosure has a shape that is easy to process and is conducive to the distribution and installation according to the dispersion of the heating points 421 to ensure the guiding effect on the gas phase working fluid.

[0078] Of course, as shown in Figure 6, the six heating points can be equally distributed above and below the working fluid guiding structure 13. The number of heating points 421 above and below the working fluid guiding structure 13 can also be unequal. For example, there can be four above and two below, or two above and four below.

[0079] Taking the seventh disclosure shown in Figure 7 as an example, the specific arrangement of its working fluid guiding structure 13 is similar to that of the working fluid guiding structure 13 in Figure 5, the only difference being the shape of the working fluid guiding structure in the two schemes. A heat source module 42 has 3 rows of heating points 421 in the first direction, each row has 2 heating points 421 spaced apart along the second direction. There are 2 working fluid guiding structures 13, which are spaced apart in both the first and second directions. The working fluid guiding structure 13 is a strip-shaped plate structure with a round bottom bowl shape in projection. The guide surface 1301 formed at the bottom of the working fluid guiding structure 13 is an arc surface with high left and right ends and low middle opening in the second direction. The 2 working fluid guiding structures 13 are respectively set in the area between two adjacent rows of heating points 421 in the 3 rows of heating points 421. The two ends of any one working fluid guiding structure 13 in the first direction extend to the adjacent row of heating points 421, and the two ends of any one working fluid guiding structure 13 in the second direction protrude two columns of heating points 421. The shape of the working fluid guiding structure 13 in this disclosure facilitates the formation of a guiding surface 1301 that guides the gaseous working fluid to both sides in the second direction of the heated zone 1101. Furthermore, the dimensions of the guiding surface 1301 in the second direction can be processed by adjusting the dimensions of the working fluid guiding structure 13 in the second direction, which facilitates the complete guidance of the rising gaseous working fluid to both sides in the second direction of the heated zone 1101 by the guiding surface 1301.

[0080] Taking the example of the eighth disclosure shown in Figure 8, a heat source module 42 has 3 rows of heating points 421 in the first direction, and each row has 2 heating points 421 spaced apart along the second direction. There are 2 working fluid guiding structures 13, which are spaced apart in both the first and second directions. The working fluid guiding structure 13 is a strip-shaped plate structure with a flat bottom bowl shape. The bottom of the working fluid guiding structure 13 forms two opposing guiding surfaces 1301, which are connected by a flat bottom surface. The two working fluid guiding structures 13 are respectively set in the area between two adjacent rows of the 3 rows of heating points 421. The two ends of any one working fluid guiding structure 13 in the first direction extend to the adjacent upper and lower heating points 421. The two ends of any one working fluid guiding structure 13 in the second direction protrude from both sides of the two rows of heating points 421. The shape of the working fluid guiding structure 13 in this disclosure facilitates the formation of two guiding surfaces 1301 that guide the gaseous working fluid to both sides in the second direction of the heated zone 1101. Furthermore, the dimensions of the guiding surfaces 1301 in the second direction can be processed by adjusting the dimensions of the working fluid guiding structure 13 in the second direction, which facilitates the complete guidance of the rising gaseous working fluid to both sides in the second direction of the heated zone 1101 by the guiding surfaces 1301.

[0081] Taking the ninth disclosure shown in Figure 9 as an example, a heat source module 42 has three rows of heating points 421 in the first direction, with two heating points 421 spaced apart in each row along the second direction. There are two working fluid guiding structures 13, which are sequentially spaced apart in the first direction. Each working fluid guiding structure 13 is a block-shaped structure projected as a triangle on the first sidewall 111 or the second sidewall 114. The bottom of each working fluid guiding structure 13 forms a guiding surface 1301. The two working fluid guiding structures 13 are respectively located in the area between two adjacent rows of heating points 421. Both ends of any one working fluid guiding structure 13 in the first direction extend to the adjacent upper and lower heating points 421, and both ends of any one working fluid guiding structure 13 in the second direction protrude from both sides of the two rows of heating points 421. The shape of the working fluid guiding structure 13 in this disclosure is easy to process and helps improve the structural strength and installation effect of the working fluid guiding structure 13.

[0082] Taking the example of the disclosure shown in Figure 10, a heat source module 42 has four rows of heating points 421 in the first direction, and each row has at least one heating point 421 spaced apart along the second direction. Each row has at least one heating point 421; when the number of heating points 421 in the same row is at least two, the heating points 421 in the same row are spaced apart along the second direction. The working fluid guiding structure 13 is generally arranged in a meandering serpentine structure extending along the first direction. At this time, the projection of the working fluid guiding structure 13 on the first sidewall 111 or the second sidewall 114 is a meandering strip; its sidewalls extending downward along the first direction form three guiding surfaces 1301, and the three guiding surfaces 1301 are respectively located in the regions between each pair of adjacent rows of heating points 421. The working fluid guiding structure 13 in this disclosure is S-shaped along a first direction, separating multiple heated zones 1101 arranged along the first direction to both sides of the working fluid guiding structure 13. The shape of the working fluid guiding structure 13 facilitates the simultaneous formation of multiple guiding surfaces 1301 that guide the gaseous working fluid to both sides of the heated zones 1101 in a second direction, and the multiple guiding surfaces 1301 can be distributed at intervals along the first direction according to the shape. It is understood that in other disclosures not shown, a heat source module 42 may have a row of heating points 421 in the second direction, and each bend of the S-shaped working fluid guiding structure 13 crosses at least one heating point 421 to ensure the guiding effect of the gaseous working fluid at each heating point 421 located in the lower region.

[0083] Taking the example of disclosure eleven shown in Figure 11, a heat source module 42 has two rows of heating points 421 in the first direction, and each row has two heating points 421 spaced apart along the second direction. There is one working fluid guiding structure 13, which is a strip-shaped plate structure with a straight projection. The guide surface 1301 formed at the bottom of the working fluid guiding structure 13 is an inclined plane. The two ends of the working fluid guiding structure 13 in the first direction extend to the upper and lower sides of the two furthest heating points 421 in the first direction, respectively, and its two ends in the second direction extend to the left and right sides of the two furthest heating points 421 in the second direction, respectively. The working fluid guiding structure 13 is respectively disposed in the area between the two rows of heating points 421. The shape of the working fluid guiding structure 13 in this disclosure is easier to process than a structure with an arc, thereby reducing application costs.

[0084] It is understood that the setting and selection of the working fluid guiding structure 13 are not limited to those disclosed above, and can be designed and adjusted according to the actual situation. Examples will not be given here.

[0085] Sixthly, as shown in Figure 2, in this disclosure, the evaporator 10 further includes heat-conducting and diffusing ribs 14 disposed within the evaporator body 11. One end of the heat-conducting and diffusing ribs 14 is connected to the first sidewall 111, and the other end of the heat-conducting and diffusing ribs 14 extends away from the first sidewall 111. This arrangement allows for further conduction and dissipation of heat through the heat-conducting and diffusing ribs 14, thereby improving the heat dissipation effect of the evaporator 10 on the heating point 421 and the heat source module 42.

[0086] Optionally, as shown in Figure 2, the other end of the heat-conducting and diffusing rib 14 extends to the inner surface of the sidewall opposite to the first sidewall 111, to ensure the fixing effect of the heat-conducting and diffusing rib 14 and the heat conduction and dissipation effect of the heat-conducting and diffusing rib 14, thereby further improving the heat dissipation effect. It is understood that the other end of the heat-conducting and diffusing rib 14 may also extend to the inner surface of any inner wall of other evaporator body 11 not located on the first sidewall 111, and is not limited to the sidewall opposite to the first sidewall 111.

[0087] It is understood that there are multiple heat-conducting and diffusing ribs 14, and at least some or all of the heat-conducting and diffusing ribs 14 are located within the heated zone 1101. In this disclosure, the connection points of all heat-conducting and diffusing ribs 14 with the first sidewall 111 are located within the heated zone 1101 or at least partially within the heated zone 1101, which is beneficial to further improve the heat conduction and dissipation effect.

[0088] Seventhly, as shown in Figures 2 and 3, the evaporator 10 further includes a capillary liquid return structure 12 disposed within the evaporator body 11. The capillary liquid return structure 12 is disposed on the inner surface of at least one sidewall of the evaporator body 11, including the first sidewall 111, and / or, on the outer surface of the heat-conducting diffusion ribs 14, and / or, on the surface of the working fluid guiding structure 13. The capillary liquid return structure 12 has pores for adsorbing liquid, so as to adsorb the liquid working fluid within the evaporator body 11 onto the area of ​​the heated zone 1101 near the first sidewall 111 and its vicinity, thereby preventing dry burning in a portion of the heated zone 1101. The working fluid guiding structure 13 is disposed on the first sidewall 111, and / or, on the capillary liquid return structure 12. It should be noted that in this disclosure, the end of the working fluid guiding structure 13 near the heating point 421 or the heat source module 42 passes through the capillary return structure 12 and is disposed on the first sidewall 111. It is understood that in other disclosures (not shown), the end of the working fluid guiding structure 13 near the heating point 421 or the heat source module 42 may be disposed on the capillary return structure 12 or simultaneously on both the capillary return structure 12 and the first sidewall 111, and the other end of the working fluid guiding structure 13 away from the heat source module 42 may be extended according to actual conditions; examples are not provided here.

[0089] In this disclosure, the capillary liquid return structure 12 can be disposed on the area projected onto the first sidewall 111 of the heated zone 1101 (the area within the dashed box in Figures 2 and 3). At the same time, the capillary liquid return structure 12 is also disposed on the surface of the heat-conducting diffusion ribs 14. Through the capillary liquid return structure 12, the liquid working medium inside the evaporator body 11 can be adsorbed onto the heated zone 1101 and the area near the heated zone 1101, so as to continuously provide liquid working medium to the heated zone 1101 and the area near the heated zone 1101, which can avoid the situation of dry burning due to lack of liquid. At the same time, it is beneficial to improve the liquid return efficiency of the liquid working medium in the evaporator body 11 and the deheating effect of the evaporator 10 on the heating point 421 or the heat source module 42.

[0090] Optionally, the capillary return structure 12 on the heat-conducting and diffusing rib 14 is integrally formed with the capillary return structure 12 on the heated zone 1101. With this configuration, the heat-conducting and diffusing rib 14 primarily conducts heat to the heated zone 1101, which helps prevent the heated zone 1101 from overheating and becoming dry-burning due to insufficient liquid. Simultaneously, the covering of the capillary return structure 12 also helps prevent dry-burning due to insufficient liquid at the heat-conducting and diffusing rib 14.

[0091] Understandably, the extension of the heat-conducting and diffusing ribs 14 can be adjusted according to the actual situation. It can be one or more combinations of straight lines, broken lines, meandering lines, arcs, etc. The distribution of multiple heat-conducting and diffusing ribs 14 can also be adjusted according to the actual situation. They can be radially distributed or evenly distributed, etc.

[0092] Optionally, each heat-conducting and diffusion rib 14 is provided with a capillary liquid return structure 12.

[0093] Specifically, at least one heat-conducting and diffusing rib 14 is provided with multiple heat-conducting protrusions 141, as shown in the fourth disclosure of FIG4. In this disclosure, multiple heat-conducting and diffusing ribs 14 located in the central region are provided with heat-conducting protrusions 141 to further increase the surface area of ​​the heat-conducting and diffusing ribs 14, thereby improving the heat conduction and dissipation effect. It is understood that the arrangement of the heat-conducting protrusions 141 can be designed according to the actual situation, and will not be listed in detail here.

[0094] It should be noted that the capillary liquid return structure 12 has pores inside for adsorbing liquid. The capillary liquid return structure 12 is one or more of sintered powder, grooves, and wire mesh, which can be designed according to actual conditions to ensure the adsorption effect of the capillary liquid return structure 12 on the liquid working medium. The grooves can be dot-shaped pits, linear grooves, Y-shaped, C-shaped, etc., and the wire mesh can be wire mesh protrusions or wire mesh grooves, etc., which will not be listed here.

[0095] Eighthly, as shown in disclosure four in Figure 4, the outer surface of the first sidewall 111 has a recessed groove that extends inward. This groove is used to limit the mounting of the heat source module 42, which includes the heating point 421. This design increases the contact area between the heat source module 42 and the first sidewall 111, thereby expanding the heat exchange area and further improving the heat dissipation effect of the evaporator 10 on the heating point 421 and the heat source module 42. It is understood that multiple sidewalls of the groove can also serve as heat-conducting inner walls, and the area corresponding to the heated zone 1101 in this disclosure is larger than the area of ​​the heated zone 1101 in disclosure one.

[0096] When a heat source module 42 includes multiple heating points 421 and there are multiple heat source modules 42, multiple sets of heating zones 1101 are correspondingly formed inside the evaporator body 11. There can be one working fluid guiding structure 13, in which case the working fluid guiding structure 13 simultaneously corresponds to at least one of the multiple heat source modules 42; or, there can be multiple working fluid guiding structures 13, each corresponding to one of the multiple heat source modules 42; or, one working fluid guiding structure 13 corresponds to at least two heat source modules 42; or, some heat source modules 42 all correspond to working fluid guiding structures 13, or some heat source modules 42 do not correspond to working fluid guiding structures 13, i.e., heat source modules 42 with low heat output may not correspond to working fluid guiding structures 13. The same applies to the capillary return structure 12. This helps to reduce the processing and design costs of the working fluid guiding structure 13 and the capillary return structure 12 while ensuring the heat dissipation effect on the heat source modules 42. Specifically, the number of heating zones 1101 in a heat source module 42 corresponding to each working fluid guiding structure 13 can be set according to the actual situation.

[0097] Similarly, there can be multiple working fluid guiding structures 13, each working fluid guiding structure 13 corresponding to one heating point 421, or one working fluid guiding structure 13 corresponding to two or more heating points 421; or, some heating points 421 do not have corresponding working fluid guiding structures 13.

[0098] As shown in the second disclosure in Figure 13, there are four heat source modules 42, each with six heating zones 1101 spaced apart along the first and second directions. There are multiple working fluid guiding structures 13, with each heat source module 42 corresponding to multiple working fluid guiding structures 13. The arrangement of the working fluid guiding structure 13 for each heat source module 42 is similar to that in Figure 1, and will not be repeated here. This arrangement helps ensure the exhaust capacity of each heat source module 42, thereby guaranteeing the heat dissipation effect of the heat source module 42.

[0099] As shown in Figure 14, in the twelve disclosures, each heat source module 42 has three rows of heating points 421 in the first direction, and each row has two heating points 421 spaced apart along the second direction. Each heating point corresponds to a heated area. There are two working fluid guiding structures 13, which are spaced apart in both the first and second directions. The working fluid guiding structure 13 is a strip-shaped plate structure with a flat bottom and a bowl shape projected onto the first sidewall 111 or the second sidewall 114. The bottom surface of the working fluid guiding structure 13 and the bottom surfaces of the upward-curving sides on both sides of the bottom together form a guiding surface 1301. The two working fluid guiding structures 13 are respectively located in the area between two adjacent rows of the three rows of heating points 421. The two ends of any one working fluid guiding structure 13 in the first direction extend to the adjacent upper and lower heating points 421, and the two ends of any one working fluid guiding structure 13 in the second direction protrude from both sides of the two rows of heating points 421. The shape of the working fluid guiding structure 13 in this disclosure facilitates the formation of two guiding surfaces 1301 that guide the gaseous working fluid to both sides in the second direction of the heated zone 1101. Furthermore, the dimensions of the guiding surfaces 1301 in the second direction can be processed by adjusting the dimensions of the working fluid guiding structure 13 in the second direction, which facilitates the complete guidance of the rising gaseous working fluid to both sides in the second direction of the heated zone 1101 by the guiding surfaces 1301.

[0100] As shown in Figure 15, in disclosure thirteen, there are four heat source modules 42, each heat source module 42 having six heating zones 1101 spaced apart along the first and second directions. There are multiple working fluid guiding structures 13, with any one working fluid guiding structure 13 corresponding to two heat source modules 42. The shape of the working fluid guiding structure 13 is the same as that in Figure 14, the only difference being that two adjacent heat source modules 42 share the working fluid guiding structure 13.

[0101] As shown in Figure 16, in disclosure fourteen, there are five heat source modules 42, including a smaller heat source module 42 in the middle and two larger heat source modules 42 on each side of the smaller heat source module 42. For each larger heat source module 42, there are six heating zones 1101 spaced apart along a first direction and a second direction. There are multiple working fluid guiding structures 13, with each working fluid guiding structure 13 corresponding to two heat source modules 42. The smaller heat source module 42 in the middle does not have a working fluid guiding structure 13.

[0102] It should be noted that the projection of the heated area 1101 on the first sidewall 111 in the disclosures shown in Figures 14 to 16 is the same as that shown in the disclosure shown in Figure 13, or the projection of the heated area 1101 on the first sidewall 111 in the disclosures shown in Figures 14 to 16 is a proportional scaling of the heated area 1101 in the disclosure shown in Figure 13.

[0103] Ninthly, another disclosure of this application provides a thermosiphon heat exchanger 44, which includes a condenser 20, a connecting pipe 30, and the aforementioned evaporator 10. A portion of the condenser 20 is positioned at a higher height than the evaporator 10; for example, the entire condenser 20 is positioned higher than the evaporator 10. Alternatively, half of the condenser 20 may have its projection onto a plane formed by a first direction and a second direction within the projection area of ​​the evaporator 10 on the same plane. The bottom of the evaporator body 11 has a liquid phase inlet 113, and the condenser 20 has a liquid phase outlet and a gas phase inlet. The gas phase inlet is connected to the gas phase outlet 112 via the connecting pipe 30, and the liquid phase inlet 113 is connected to the liquid phase outlet via the connecting pipe 30. The positions of the gas phase inlet and the liquid phase outlet can be adjusted according to actual conditions; they can be located on the same side of the evaporator body 11 or on opposite sides of the evaporator body 11. The type of condenser 20 is not limited; it can be tube-fin type, microchannel type, or plate-fin type, etc. The working fluid with a certain latent heat of phase change flows inside the thermosiphon heat exchanger 44.

[0104] As shown in Figures 17 and 18, another disclosure of this application provides a power conversion device 40, which includes a heat source module 42 and the aforementioned thermosiphon heat exchanger. The heat source module 42 is disposed on the outer surface of the first sidewall 111 of the evaporator 10. Further, referring to Figure 19, the power conversion device 40 also includes a chassis 41, a fan 43, and the heat source module 42. The chassis 41 has a first air duct 411 and a second air duct 412, both of which are provided with ventilation openings 45. The condenser 20 of the fan 43 and the thermosiphon heat exchanger 44 are both disposed within the first air duct 411, the evaporator 10 is disposed within the second air duct 412, and the heat source module 42 is disposed within the chassis 41 and is used to heat the evaporator body 11. The chassis 41 serves to protect the internal components and also supports the installation of internal / external components and the overall installation of the device. The heat source module 42 has multiple heat sources / heating wafers on the side near the first side wall 111. Each heat source / heating wafer forms a corresponding heating point 421, and the projection of any heating point 421 on the first side wall 111 is located inside the heated area 1101.

[0105] As shown in Figure 20, another disclosure of this application provides a power conversion device 40, which differs from the power conversion device 40 disclosed in Figures 17 to 19 in that its evaporator 10 and condenser 20 are connected and are an integral structure. The gaseous working fluid in the evaporator 10 will rise directly and enter the condenser 20, and after condensation, it will flow back to the bottom of the evaporator 10 through the connecting pipe 30.

[0106] As shown in Figure 21, another disclosure of this application provides a power conversion device 40, which differs from the power conversion device 40 disclosed in Figure 17 in that it does not have a recirculation connecting pipe 30. It is understood that a recirculation channel, spaced apart from the rising gaseous working fluid channel, can be provided inside the condenser 20 and evaporator 10 for recirculation.

[0107] Finally, it should be emphasized that the multiple heating points 421 of a heat source module 42 referred to in the various solutions of this disclosure are merely illustrative examples. In practical applications, a heating point 421 can also be a separate heat source module 42.

[0108] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0109] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these disclosures do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of exemplary disclosures may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0110] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0111] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0112] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0113] The above description is merely an optional disclosure of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An evaporator, comprising an evaporator body (11) and a working fluid guiding structure (13) disposed within the cavity of the evaporator body (11), wherein the area of ​​the inner surface of the first sidewall (111) of the evaporator body (11) corresponding to the heating point (421) is a heated zone (1101), the working fluid guiding structure (13) is at least partially disposed within or above the heated zone (1101), the working fluid guiding structure (13) has a guiding surface (1301) extending in a direction away from the heated zone (1101).

2. The evaporator according to claim 1, wherein, The working fluid guiding structure (13) extends along a direction that has a non-zero angle with the first direction and / or a second direction, and the working fluid guiding structure (13) forms the guiding surface (1301) on the bottom wall and / or side wall downward in the first direction; wherein, the first direction is parallel to the rising direction of the gaseous working fluid in the evaporator body (11), and the second direction is parallel to the plane where the first side wall (111) is located and orthogonal to the first direction.

3. The evaporator according to claim 2, wherein, There are multiple working fluid guiding structures (13), and the multiple working fluid guiding structures (13) are distributed at intervals along the first direction, and / or the multiple working fluid guiding structures (13) are distributed at intervals along the second direction; or, the width of the projection of the working fluid guiding structure (13) on the horizontal plane along the second direction is greater than or equal to the width of the projection of the heating point (421) on the horizontal plane along the second direction.

4. The evaporator according to claim 1, wherein, There are multiple heating points (421), and each heating point (421) corresponds to a heated area (1101) on the first sidewall (111).

5. The evaporator according to claim 2, wherein, At least one portion of the working fluid guiding structure (13) is located within or above at least two of the heated zones (1101), wherein at least two of the heated zones (1101) are distributed along the second direction; Alternatively, the working fluid guiding structure (13) bends in an S-shape along the first direction, separating the plurality of heated zones (1101) arranged along the first direction to both sides of the working fluid guiding structure (13).

6. The evaporator according to claim 5, wherein, The projection portions of at least two of the working fluid guiding structures (13) on the horizontal plane overlap.

7. The evaporator according to claim 1, wherein, The evaporator also includes a heat-conducting and diffusion rib (14) disposed in the evaporator body (11), one end of the heat-conducting and diffusion rib (14) being connected to the first sidewall (111), and the other end of the heat-conducting and diffusion rib (14) extending away from the first sidewall (111).

8. The evaporator according to claim 7, wherein, The other end of the heat-conducting and diffusion rib (14) extends to the other sidewall opposite to the first sidewall (111); Alternatively, at least one end of the heat-conducting and diffusion rib (14) connected to the first sidewall (111) is located within the heated zone (1101); Alternatively, at least one of the heat-conducting and diffusion ribs (14) is provided with a plurality of heat-conducting protrusions (141).

9. The evaporator according to claim 7, wherein, The evaporator further includes a capillary liquid return structure (12) disposed within the evaporator body (11). The capillary liquid return structure (12) is disposed on at least one inner surface of the evaporator body (11) including the first sidewall (111), and / or the outer surface of the heat-conducting diffusion rib (14), and / or the surface of the working fluid guiding structure (13), or the working fluid guiding structure (13) is disposed on the capillary liquid return structure (12).

10. The evaporator according to claim 9, wherein, The working fluid guiding structure (13) is disposed on the first sidewall (111); Alternatively, the working fluid guiding structure (13) extends along a third direction away from the edge of the heated zone (1101) to the second sidewall (114), or extends to a position spaced apart from the second sidewall (114), wherein the second sidewall (114) is the sidewall of the evaporator body (11) disposed opposite to the first sidewall (111), and the third direction is the direction from the outer surface of the first sidewall (111) toward the inner surface and perpendicular to the first sidewall (111); Alternatively, the working fluid guiding structure (13) has at least one of the guiding surfaces (1301), and the projection of the working fluid guiding structure (13) on the first sidewall (111) is one or more of the following: triangular, meandering, inclined straight, arc, V-shaped, round-bottomed bowl, and flat-bottomed bowl.

11. The evaporator according to claim 1, wherein, The outer surface of the first sidewall (111) has a groove for limiting the installation of a heat source module (42) including the heating point (421).

12. A thermosiphon heat exchanger, said thermosiphon heat exchanger comprising a condenser (20), a connecting pipe (30), and an evaporator according to any one of claims 1 to 11, wherein, The height of a portion of the condenser (20) is higher than that of the evaporator. The evaporator body (11) has a gas phase outlet (112) and a liquid phase inlet (113). The condenser (20) has a liquid phase outlet and a gas phase inlet. The gas phase inlet is connected to the gas phase outlet (112) through a connecting pipe (30), and the liquid phase inlet (113) is connected to the liquid phase outlet through a connecting pipe (30).

13. A power conversion device, the power conversion device comprising at least one heat source module (42) and the thermosiphon heat exchanger of claim 12, the heat source module (42) being disposed on the surface of the first sidewall (111) of the evaporator, and one of the heat source modules (42) comprising at least one of the heating points (421).

Images