Evaporator and power conversion equipment

Abstract

The invention discloses an evaporator and power conversion equipment, and belongs to the technical field of radiators. The multiple supporting structures are connected between the first inner wall face and the second inner wall face, part of the supporting structures define a pressure relief area, the pressure relief area communicates with the evaporation cavity, and the strength of the pressure relief area is smaller than that of the area where the other supporting structures are located; the pressure relief part is arranged in the pressure relief area and is arranged close to one supporting structure which forms the pressure relief area in a surrounding mode. The geometric shape of the pressure relief area is suddenly changed at the pressure relief part through the pressure relief part, so that the edge of the part, located in the pressure relief area, of the pressure relief part generates stress concentration under the action of pressure, the yield limit or the breaking strength of a material is easily reached firstly, breakage occurs, and directional pressure relief is achieved. Due to the fact that the wall thicknesses of the shell in the corresponding pressure relief area and the non-pressure relief area are the same, the overall corrosion resistance and strength of the evaporator are improved, and the reliability of equipment is improved.

Description

Technical Field

[0001] This application relates to the field of radiator technology, and more particularly to an evaporator and power conversion device. Background Technology

[0002] As the capacity of power conversion equipment increases, the losses of its key power components also increase, and the heat flux density becomes larger. The mainstream heat dissipation solution is usually a phase change heat sink. The phase change heat sink contains a working fluid that undergoes a gas-liquid phase change. Relying on the boiling-condensation cycle of the internal working fluid, the heat of the key power components is quickly carried from the evaporator to the condenser, and finally carried away by the air through convection heat dissipation on the condenser side.

[0003] Under abnormal operating conditions, the refrigerant will be continuously heated, leading to an increase in pressure. When the internal pressure is high enough, there is a risk of explosion. To avoid this risk, a venting structure is usually installed on the radiator casing to vent the explosion in a targeted manner at lower pressures. However, existing venting structures can easily affect the overall reliability of the equipment. Summary of the Invention

[0004] This application provides an evaporator designed to address the technical problem that existing explosion venting structures can easily affect the overall reliability of the equipment; another objective of this application is to provide a power conversion device.

[0005] To achieve the above objectives, according to a first aspect of this application, an evaporator is provided, comprising: A housing having an evaporation chamber, the housing including opposing first and second inner wall surfaces; Multiple support structures and pressure relief sections are connected between the first inner wall surface and the second inner wall surface. Some of the support structures form a pressure relief area, which is connected to the evaporation chamber. The strength of the pressure relief area is less than the strength of the remaining support structures. The pressure relief section is disposed in the pressure relief area, and the pressure relief section is disposed near a support structure that encloses the pressure relief area.

[0006] In some embodiments, a portion of the support structure is configured as a plurality of support columns that enclose the pressure relief area, and at least one of the support columns forms an opening with respect to an adjacent support column.

[0007] In some embodiments, the housing includes a plurality of side plates disposed around the outer periphery of the first inner wall surface and the second inner wall surface; At least one of the side plates is configured as the support structure and together with the plurality of support columns, forms the pressure relief area.

[0008] In some embodiments, the evaporation cavity includes a modular region and a non-modular region; At least a portion of the support columns are first support columns, and the first support columns and at least a portion of the pressure relief area are disposed in the module area.

[0009] In some embodiments, the first inner wall surface or the second inner wall surface is provided with reinforcing ribs at positions corresponding to the pressure relief area, the reinforcing ribs extend along a first direction, and two adjacent reinforcing ribs are spaced apart to form a first flow channel.

[0010] In some embodiments, the evaporation cavity includes a modular region and a non-modular region; At least a portion of the support column is a second support column, and the second support column and the pressure relief area are located in the non-module area.

[0011] In some embodiments, one end of the pressure relief portion is disposed within the pressure relief area, and the other end of the pressure relief portion is disposed outside the pressure relief area.

[0012] In some embodiments, the minimum gap between the pressure relief part and the adjacent support structure is H mm, satisfying: 0 ≤ H ≤ 10 mm.

[0013] In some embodiments, the support structure surrounding the pressure relief region has a first side and a second side, the pressure relief portion includes a first pressure relief side, the first pressure relief side is located between the first side and the second side, and the vertical distance between the first pressure relief side and the first side is less than the vertical distance between the first pressure relief side and the second side.

[0014] In some embodiments, the pressure relief portion is disposed independently of the support structure forming the first side.

[0015] In some embodiments, the support structure forming the first side has a protrusion extending toward the pressure relief region, the protrusion being configured as the pressure relief portion.

[0016] In some embodiments, the number of housings is provided as a plurality, the plurality of housings are arranged along a first direction, and two adjacent housings are connected; Alternatively, the number of evaporation chambers may be multiple, and the multiple evaporation chambers may be independent of each other.

[0017] According to a second aspect of this application, a power conversion device is provided, comprising: Heating element; Condenser; In the aforementioned evaporator, the condenser is located on one side of the evaporator and is interconnected with it, and the heating element is thermally connected to the side of the evaporator away from the condenser.

[0018] In the evaporator of this embodiment, the pressure relief section causes a sudden change in the geometry of the pressure relief area. This results in stress concentration at the edge of the portion of the pressure relief section located within the pressure relief area under pressure, making it easier for the material to reach its yield strength or fracture strength first, thus achieving directional pressure relief. Since the wall thickness of the shell is the same in both the corresponding pressure relief area and the non-pressure relief area, the overall corrosion resistance and strength of the evaporator are increased, which helps to improve the overall reliability of the equipment.

[0019] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0022] Figure 1 This is a schematic diagram of the structure of the evaporator and condenser provided in the embodiments of this application; Figure 2 This is a schematic diagram of the distribution of the support structure provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the first pressure relief edge and the second pressure relief edge provided in the embodiments of this application; Figure 4 This is a schematic diagram showing the location of the support structure and pressure relief part provided in the embodiments of this application; Figure 5 A schematic diagram showing the distribution of multiple second support columns provided in an embodiment of this application; Figure 6 Another schematic diagram showing the distribution of the plurality of second support columns provided in the embodiments of this application; Figure 7 Another schematic diagram showing the distribution of the plurality of second support columns provided in the embodiments of this application; Figure 8 A schematic diagram showing the distribution of multiple first support columns and second support columns provided in the embodiments of this application; Figure 9 A schematic diagram of the second support column and side plate provided in an embodiment of this application; Figure 10 A schematic diagram of the first support column, the second support column, and the side plate provided in the embodiments of this application; Figure 11 A schematic diagram showing the locations of the pressure relief area, module area, and non-module area provided in an embodiment of this application; Figure 12 This is a schematic diagram showing the location of the pressure relief area and the module area provided in the embodiments of this application; Figure 13 A schematic diagram of the reinforcing ribs and the first flow channel provided in the embodiments of this application; Figure 14 A schematic diagram of the structure of the first flow channel and the second flow channel provided in the embodiments of this application; Figure 15 Schematic diagrams of the structures of multiple housings provided in the embodiments of this application; Figure 16 A schematic diagram showing the shell breaking open in the corresponding pressure relief area, as provided in an embodiment of this application; Figure 17 This is a schematic diagram of the minimum gap between the pressure relief part and the supporting structure provided in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures: 1. Shell; 10. Evaporation chamber; 101. Modular area; 102. Non-modular area; 11. First inner wall surface; 12. Second inner wall surface; 13. Reinforcing rib; 130. First flow channel; 14. Side plate; 2. Support structure; 20. Pressure relief area; 21. Support column; 210. Opening; 211. First support column; 212. Second support column; 23. First side; 24. Second side; 25. Second flow channel; 3. Pressure relief section; 31. First pressure relief edge; 32. Second pressure relief edge; 401. Left side line; 402. Right side line; 403. Top line; 404. Bottom line; 5. Condenser; 6. Heating element; X, the first direction; Y, the second direction. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0025] In the description of this application, it should be understood that the terms "height," "thickness," "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and 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 this application. In the description of this application, "a plurality of" means two or more, and "at least one" can mean one, two, or more, unless otherwise expressly specified.

[0026] It should also be noted that in the accompanying drawings of the embodiments of this application, the arrow marked with X represents the first direction X, and the arrow marked with Y represents the second direction Y. The first direction X and the second direction Y are introduced to more clearly illustrate the structure and relative positional relationship of each component in the evaporator. In practical applications, the first direction X and the second direction Y may change depending on the placement of the evaporator.

[0027] In related technologies, phase change heat sinks contain a working fluid that undergoes gas-liquid phase change. Relying on the boiling-condensation cycle of the internal working fluid, the heat of key power devices is quickly carried from the evaporator to the condenser, and finally carried away by the air through convection heat dissipation on the condenser side.

[0028] Under abnormal operating conditions, the refrigerant will continuously heat up, leading to an increase in pressure. When the internal pressure is high enough, there is a risk of explosion. To avoid this risk, a venting structure is usually installed on the radiator casing. This venting structure will proactively vent the explosion at lower pressures. For example, an explosion venting pipe can be added to the radiator, and a section of the pipe can be thinned to create a weak point and achieve early venting; or, a localized area of ​​a component of the radiator (such as the evaporator plate or condenser) can be thinned to achieve early venting. However, this method of achieving directional venting by thinning a localized structure requires high-precision manufacturing processes, and because the thickness of the weak area is reduced, even slight corrosion can affect the reliability of the radiator. In addition, the weak area reduces the strength of the radiator at that location, and impacts during processing, installation, and use can all affect the weak area.

[0029] This application provides an evaporator; please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3The evaporator includes a shell 1, a support structure 2, and a pressure relief section 3. The shell 1 has an evaporation chamber 10 for containing a phase change working fluid. The shell 1 has a first direction X and a second direction Y. The first direction X corresponds to the height direction of the shell 1, and the second direction Y corresponds to the length direction of the shell 1, and the first direction X and the second direction Y intersect. The shell 1 includes multiple inner wall surfaces, which together enclose the evaporation chamber 10. Among the multiple inner wall surfaces, two inner wall surfaces arranged opposite each other along the thickness direction of the shell 1 are a first inner wall surface 11 and a second inner wall surface 12, and the area of ​​the first inner wall surface 11 and the second inner wall surface 12 is larger than the area of ​​the other inner wall surfaces.

[0030] Multiple support structures 2 are provided, and these support structures 2 are connected between the first inner wall surface 11 and the second inner wall surface 12. The support structures 2 are used to form the flow channel of the phase change medium. Part of the support structures 2 encloses a pressure relief region 20, which connects to the evaporation chamber 10, allowing the phase change working medium to enter the pressure relief region 20. The strength of the pressure relief region 20 is less than the strength of the regions where the other support structures 2 are located. At least a portion of the pressure relief part 3 is disposed within the pressure relief region 20 and connects to the first inner wall surface 11 and the second inner wall surface 12. The pressure relief part 3 is disposed close to one of the support structures 2 that encloses the pressure relief region 20, that is, there is a minimum gap H between the pressure relief part 3 and one of the support structures 2 (see [reference]). Figure 17 The minimum gap H satisfies: 0 ≤ H ≤ 10 mm. Specifically, the minimum gap H can be any value among 0 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, and 10 mm, or a range of any two. Where the minimum gap is 0, it indicates that the pressure relief part 3 and the corresponding support structure 2 are in close contact, or that the two are connected to each other.

[0031] The pressure relief section 3 is used to locally increase the strength of the pressure relief region 20, so that when the internal pressure of the housing 1 is the same, the part of the pressure relief region 20 other than the pressure relief section 3 can bulge and rupture at the position of the pressure relief section 3 on one side of the pressure relief region 20, thereby achieving directional pressure relief.

[0032] In this embodiment, the wall thickness of the housing 1 corresponding to the pressure relief region 20 is the same as the wall thickness of the region where the other supporting structures 2 are located. The strength of the pressure relief region 20 is less than the strength of the region where the other supporting structures 2 are located. This can be achieved by not providing supporting structures 2 in the pressure relief region 20, or by designating the supporting structures 2 outside the pressure relief region 20 as supporting structure a, and providing supporting structure b in the pressure relief region 20, where the strength of supporting structure b is less than the strength of supporting structure a. In other embodiments, the wall thickness of the housing 1 corresponding to the pressure relief region 20 may also be different from the wall thickness of the region where the other supporting structures 2 are located.

[0033] To facilitate the explanation of the pressure relief principle of the pressure relief section 3 and the pressure relief region 20, the boundary of the pressure relief region 20 is represented by a dashed line M in the attached figure. It should be understood that the dashed line M is only for illustration and does not exist in the actual structure. The dashed line M can form a closed shape, such as a rectangle. The supporting structure 2 corresponding to the periphery of the dashed line M is denoted as the supporting structure c. The number of supporting structures c can be one or more.

[0034] When there is only one support structure c, the inner edge of the support structure c can coincide with the dashed line M, or there can be a certain gap. In this case, the pressure relief part 3 is set close to one support structure 2 that encloses the pressure relief area 20, which means that the pressure relief part 3 is close to any part of the support structure c, for example, the pressure relief part 3 is attached to the inner edge of one side of the support structure c or there is a gap of less than or equal to 10mm.

[0035] When there are multiple support structures c, the overall arrangement trajectory of the multiple support structures c is similar to the dashed line M. Alternatively, all the support structures 2 are arranged in a matrix on the plane formed by the first direction X and the second direction Y. Connecting the edges of the multiple support structures c towards the dashed line M sequentially can form a closed contour line. This contour line can coincide with the dashed line M or have a certain gap. Please refer to [link / reference]. Figure 17 At this point, the pressure relief section 3 being positioned close to a support structure 2 that encloses the pressure relief area 20 means that, among the multiple support structures c, the minimum gap between the pressure relief section 3 and one of the support structures c is smaller than the minimum gap between the pressure relief section 3 and any other support structure c, thus making the pressure relief section 3 spatially close to one support structure c. Similarly, if among the multiple support structures c, there exists a support structure c whose minimum gap with the pressure relief section 3 satisfies: 0 ≤ H ≤ 10 mm, it means that this support structure c is the support structure 2 closest to the pressure relief section 3, i.e., the pressure relief section 3 is positioned close to this support structure 2.

[0036] At least a portion of the pressure relief part 3 is located within the pressure relief region 20, causing the pressure relief region 20 to form a concave structure at the location of the pressure relief part 3. The pressure relief part 3 increases the strength of the pressure relief region 20 at the location of the pressure relief part 3. The orthographic projection shape of the pressure relief part 3 along the second direction Y can be arc-shaped or polygonal. This embodiment uses a rectangle as an example. Specifically, the pressure relief part 3 has a first pressure relief edge 31 and two second pressure relief edges 32. The first pressure relief edge 31 is connected between the two second pressure relief edges 32, and the two second pressure relief edges 32 are respectively connected to the dashed line M. The first pressure relief edge 31, the second pressure relief edges 32, and the dashed line M together form a geometric shape similar to a concave shape.

[0037] As the pressure inside the evaporator chamber 10 gradually increases, the portion of the pressure relief region 20 excluding the pressure relief section 3, compared to other walls within the evaporator chamber 10, will bulge first due to insufficient strength of the supporting structure 2. The bulging region will generally resemble a concave shape. The pressure relief section 3 causes an abrupt change in the geometry of the pressure relief region 20 at the first pressure relief edge 31 and the second pressure relief edge 32. Therefore, the strain in the area where the pressure relief section 3 is located will be greater than in other areas, and the stress will increase at a significantly higher rate than at other locations. Please refer to [link / reference]. Figure 16 When the stress at the first pressure relief edge 31 reaches the material's yield strength or fracture strength, tearing will occur there, achieving directional pressure relief. However, since the stress at other locations is much lower than at the pressure relief seam, and the concave design causes a change in the linear direction between the first pressure relief edge 31 and the second pressure relief edge 32, the crack propagation will quickly stop. This allows the phase change working fluid to be released slowly through a smaller crack, reducing damage to the evaporator. In some embodiments, the shell 1 has the same wall thickness in the corresponding pressure relief region 20 and the rest of the region, avoiding the need for local thinning of the shell 1. This increases the overall corrosion resistance and strength of the evaporator, improving the overall reliability of the equipment, and simplifies the evaporator's manufacturing process. Please refer to [link to relevant documentation]. Figure 2 , Figure 4 and Figure 5 In some embodiments, the pressure relief part 3 is disposed within the pressure relief region 20 and is disposed close to a support structure 2 that encloses and forms the pressure relief region 20.

[0038] To facilitate the illustration of the relative positional relationship between the pressure relief section 3 and the pressure relief region 20, this embodiment introduces a dashed line M as a schematic representation of the boundary of the pressure relief region 20. The pressure relief section 3 is entirely located within the area enclosed by the dashed line M, meaning that the entire structure of the pressure relief section 3 is inside the pressure relief region 20. In this case, the pressure relief section 3 will not interfere with the arrangement of the supporting structures 2 corresponding to the periphery of the dashed line M, thus maintaining the original structure and strength of the boundary of the pressure relief region 20.

[0039] When there is only one support structure 2 used to enclose the pressure relief area 20, the pressure relief part 3 can be arranged close to the support structure 2 that encloses the pressure relief area 20. In the direction perpendicular to the first pressure relief edge 31, the side of the pressure relief part 3 away from the first pressure relief edge 31 is in contact with any inner edge of the support structure 2 or any side of the dotted line M, or there is a gap between the two, and the gap is less than or equal to 10mm.

[0040] When there are multiple support structures 2 used to enclose the pressure relief area 20, the pressure relief part 3 can be set close to one of the support structures 2 that enclose the pressure relief area 20. In the direction perpendicular to the first pressure relief edge 31, each side of the pressure relief part 3 corresponds to a support structure 2, and the pressure relief part 3 is closer to the other support structure 2 than one of the support structures 2.

[0041] Please see Figure 2 , Figure 3 and Figure 7 In some embodiments, the support structure 2 enclosing the pressure relief region 20 has opposing first sides 23 and second sides 24. The first side 23 and the second side 24 can be continuous boundaries or discontinuous boundaries. See also... Figure 3 For example, the first side 23 and the second side 24 correspond to the sidelines of the support structure 2 along the first direction X toward the dashed line M, and these sidelines form a continuous and complete boundary. Please refer to [link / reference]. Figure 7 For example, the bottom edges of the multiple support structures 2 above the dashed line M are flush and together form the first side 23, and the top surfaces of the multiple support structures 2 below the dashed line M are flush and together form the second side 24. Since adjacent support structures 2 are spaced apart, the first side 23 and the second side 24 respectively constitute discontinuous boundaries.

[0042] The pressure relief part 3 includes a first pressure relief edge 31. In the first direction X, the first pressure relief edge 31 is located between the first edge 23 and the second edge 24, and the vertical distance between the first pressure relief edge 31 and the first edge 23 is less than the vertical distance between the first pressure relief edge 31 and the second edge 24. That is to say, the pressure relief part 3 is closer to the support structure 2 corresponding to the first edge 23 than to the support structure 2 corresponding to the second edge 24.

[0043] The vertical distance between the first pressure-relieving edge 31 and the first edge 23 is smaller than the vertical distance between the first pressure-relieving edge 31 and the second edge 24, resulting in different geometric constraints on both sides of the pressure-relieving section 3. On the side with a smaller vertical distance, the material between the first pressure-relieving edge 31 and the first edge 23 is more constrained during deformation, resulting in a larger strain gradient. Therefore, the stress level in this region is higher than on the side with a larger vertical distance. As the pressure increases, the first pressure-relieving edge 31 preferentially reaches the material's strength limit, leading to fracture. By adjusting the vertical distance between the first pressure-relieving edge 31 and the first edge 23, the proximity of the fracture initiation point to the first edge 23 can be controlled. The smaller the distance, the closer the fracture location is to the first edge 23, thus ensuring that the fracture occurs at the desired location.

[0044] Please see Figure 10 and Figure 12In some embodiments, one end of the pressure relief part 3 is disposed within the pressure relief region 20, and the other end is disposed outside the pressure relief region 20. To facilitate the explanation of the relative positional relationship between the pressure relief part 3 and the pressure relief region 20, this embodiment introduces a dashed line M as a boundary diagram of the pressure relief region 20. A portion of the pressure relief part 3 is located within the area enclosed by the dashed line M, and another portion is located outside the area enclosed by the dashed line M. At this time, the first pressure relief edge 31 of the pressure relief part 3 is located inside the dashed line M, and a portion of the second pressure relief edge 32 is located inside the dashed line M, while the other portion is located outside the dashed line M. The relative position of the pressure relief part 3 and the dashed line M can be selected according to the actual arrangement of the support structure 2 and the size of the pressure relief part 3, increasing the flexibility of the structural layout.

[0045] Please see Figure 2 , Figure 3 and Figure 4 In some embodiments, the number of support structures 2 surrounding the pressure relief region 20 is set to one, and this support structure 2 extends along a first trajectory, forming the pressure relief region 20 and the opening 210. The pressure relief region 20 is connected to the evaporation chamber 10 through the opening 210. For ease of illustration, the first trajectory is represented by a dashed line L, which does not exist in the actual structure. At least a portion of the first trajectory L can resemble the dashed line M. The boundary formed by the support structure 2 is not completely closed, and it connects the pressure relief region 20 to the evaporation chamber 10 through the opening 210, thereby allowing the phase change working fluid in the evaporation chamber 10 to enter the pressure relief region 20 through the opening 210, so that the pressure in the pressure relief region 20 is consistent with the pressure in the evaporation chamber 10. By designing the support structure 2 along the first trajectory L, the shape of the pressure relief region 20 and the position of the opening 210 can be adjusted as needed, making the pressure relief process controllable.

[0046] Please see Figure 5 and Figure 7 In some embodiments, part of the support structure 2 is configured as a plurality of support columns 21, the plurality of support columns 21 enclosing a pressure relief area 20, and at least one support column 21 having an opening 210 between it and an adjacent support column 21.

[0047] Multiple support columns 21 are arranged at intervals along a first trajectory L. At least a portion of the first trajectory L can resemble the dashed line M. The support columns 21 can be columnar, block-shaped, or rib-like structures. The gaps between two adjacent support columns 21 can serve as channels for the flow of working fluid, allowing the pressure relief region 20 to communicate with the evaporation chamber 10. The multiple support columns 21 are arranged at intervals along the first trajectory L, making the boundary of the pressure relief region 20 a discontinuous structure. This discontinuous structure ensures communication between the pressure relief region 20 and the evaporation chamber 10 while defining the shape and extent of the pressure relief region 20.

[0048] Each edge of the figure enclosed by the dashed line M can correspond to a single support column 21 or multiple support columns 21. Please refer to [link / reference]. Figure 5 For example, each edge of the figure enclosed by the dashed line M corresponds to a support post 21, and the support post 21 extends along the length of the corresponding edge. Please refer to [link / reference]. Figure 7 For example, each side of the figure enclosed by the dashed line M corresponds to a plurality of support columns 21, and the plurality of support columns 21 are arranged at intervals along the length direction of the corresponding side.

[0049] Please see Figure 9 and Figure 10 In some embodiments, the housing 1 includes a plurality of side plates 14 disposed around the outer periphery of the first inner wall surface 11 and the second inner wall surface 12. At least one side plate 14 is configured as a support structure 2 and together with a plurality of support columns 21 forms a pressure relief region 20.

[0050] Multiple side plates 14 are used to enclose the evaporation chamber 10 and form the boundary support of the evaporation chamber 10. Multiple support columns 21 are arranged at intervals along the first trajectory L and together with the side plates 14, they enclose the pressure relief area 20. That is, part of the boundary of the pressure relief area 20 is formed by the side plates 14, and another part of the boundary is formed by the multiple support columns 21 arranged along the first trajectory L.

[0051] For example, the first trajectory L is U-shaped, with multiple support columns 21 and one side plate 14 together forming a pressure relief area 20. Alternatively, the first trajectory L is L-shaped, with multiple support columns 21 and two side plates 14 together forming a pressure relief area 20. Alternatively, the first trajectory L is straight, with multiple support columns 21 and three side plates 14 together forming a pressure relief area 20.

[0052] The gap between adjacent support columns 21 keeps the pressure relief region 20 connected to the evaporation chamber 10, allowing the phase change working fluid in the evaporation chamber 10 to enter the pressure relief region 20 through the gap. The side plate 14 serves as the boundary support of the evaporation chamber 10, possessing high structural strength. It forms part of the boundary of the pressure relief region 20, making full use of the existing structure of the evaporator and simplifying the manufacturing process.

[0053] Please see Figure 4 and Figure 7 In some embodiments, the pressure relief section 3 is independently provided from the support structure 2 forming the first side 23.

[0054] Please see Figure 4 For example, a single support structure 2 encloses a pressure relief region 20, and the edge of the support structure 2 near the pressure relief part 3 forms a first side 23. There is a gap between the first side 23 and the pressure relief part 3.

[0055] Please see Figure 7For example, multiple support structures 2 together form a pressure relief area 20, and the bottom edges of the multiple support structures 2 located above the dashed line M together form a first side 23. The pressure relief part 3 is disposed inside the multiple support structures 2 and is independent of the support structures 2 that form the first side 23.

[0056] The support structure 2 forming the first side 23 is part of the pressure relief region 20, used to define the range of the pressure relief region 20. The pressure relief part 3 is independent of the support structure 2, so that the two do not interfere with each other in manufacturing and assembly, and different materials or processing techniques can be selected according to their respective functional requirements. In addition, the independently provided pressure relief part 3 facilitates the adjustment of the relative position between the pressure relief part 3 and the first side 23. The distance between the pressure relief part and the first side 23 can be adjusted by changing the installation position of the pressure relief part 3. Furthermore, a gap is left between the pressure relief part 3 and its nearest support structure 2, which can form a channel for the flow of working fluid in the evaporator, reducing the resistance to the flow of working fluid. For example, please refer to Figure 11 The gap between the pressure relief section 3 and the nearest support structure 2 is in the same direction as the gaps between the other support structures 2 in the second direction Y, allowing the gaseous working fluid to flow upward.

[0057] Please see Figure 3 and Figure 6 In some embodiments, the pressure relief portion 3 is integrally formed with the support structure 2 forming the first side 23. That is, the support structure 2 forming the first side 23 has a protrusion extending toward the pressure relief region 20, which is configured as the pressure relief portion 3.

[0058] Please see Figure 3 For example, the support structure 2 forms a first side 23 corresponding to the top edge of the dashed line M, and the pressure relief part 3 is disposed on the inner side of the support structure 2 and integrally formed with the support structure 2. Please refer to Figure 6 For example, multiple support structures 2 together form a pressure relief area 20. The bottom edge of the support structure 2 located above the dashed line M forms a first side 23, and the pressure relief part 3 is integrally formed with its nearest support structure 2. Please refer to... Figure 9 For example, the side plate 14 located above the dashed line M serves as the support structure 2. The side plate 14 forms a first side 23 on the side facing the pressure relief area 20 and extends towards the pressure relief area 20 to form a pressure relief section 3.

[0059] The one-piece molding reduces the number of parts and assembly steps, improving structural consistency and reliability. After the pressure relief part 3 and the support structure 2 are integrally molded, the relative position of the pressure relief edge with respect to the first edge 23 is directly determined with high positional accuracy, facilitating precise control of the distance between the pressure relief edge and the first edge 23. Furthermore, the pressure relief part 3 and the integrally molded support structure 2 together increase the heat exchange area with the working fluid, helping to enhance heat exchange efficiency.

[0060] Please see Figure 2 In some embodiments, the evaporation chamber 10 includes a modular region 101 and a non-modular region 102. The outer surface of the housing 1 is used for thermally conductive connection of the heating element 6. The modular region 101 corresponds to the heating element 6, and the non-modular region 102 is the area within the evaporation chamber 10 excluding the modular region 101. Multiple support pillars 21 are distributed in the modular region 101 and the non-modular region 102, and the support pillars 21 in the two regions can maintain the same shape or adopt different structural shapes.

[0061] The pressure relief region 20 is disposed in at least one of the modular region 101 and the non-modular region 102. Specifically, the pressure relief region 20 can be selectively disposed within the modular region 101 to utilize the relatively dense support structure 2 within the modular region 101, thereby improving the boundary stability of the pressure relief region 20. Alternatively, the pressure relief region 20 can be disposed within the non-modular region 102, keeping the pressure relief location away from areas of high heat flux density and reducing interference with heat exchange. Alternatively, the pressure relief region 20 can be disposed in parts of both the modular region 101 and the non-modular region 102, balancing boundary stability with minimizing the impact on the modular region 101.

[0062] The number of non-module regions 102 can be one or more. To facilitate the explanation of the regions 101 and 102, the dashed line D is used in the attached figure to indicate the boundary between the module region 101 and the non-module region 102. In the actual structure, the dashed line D does not exist.

[0063] Please see Figure 11 , Figure 12 and Figure 13 In some embodiments, at least a portion of the support column 21 is a first support column 211, and the first support column 211 and at least a portion of the pressure relief area 20 are disposed in the module area 101.

[0064] Please see Figure 12 For example, the pressure relief area 20 is located in the module area 101, i.e., the dashed line M falls between the two dashed lines D. Part of the support pillars 21 are first support pillars 211 located in the module area 101, and the other part are second support pillars 212 located in the non-module area 102. The pressure relief area 20 is enclosed by multiple first support pillars 211 and multiple second support pillars 212. The second support pillars 212 correspond to the upper edge 403 of the dashed line M. The first support pillars 211 are located in the module area 101 and correspond to the left edge 401, lower edge 404, and right edge 402 of the dashed line M, respectively. The pressure relief section 3 is located above the dashed line M and is independent of the second support pillars 212. One end of the pressure relief section 3 is located inside the pressure relief area 20, and the other end is located outside the pressure relief area 20.

[0065] Please see Figure 13For example, the number of non-module regions 102 is set to multiple, and the multiple non-module regions 102 are respectively located on both sides of the module region 101 along the first direction X. The pressure relief region 20 is set in the module region 101, that is, the dashed line M is located between the two dashed lines D.

[0066] Part of the support columns 21 are first support columns 211, located in module area 101, while the other part are second support columns 212, distributed in two non-module areas 102. The pressure relief area 20 is enclosed by side plate 14, multiple first support columns 211, and multiple second support columns 212. The multiple first support columns 211 and multiple second support columns 212 are arranged at intervals along the second direction Y. The first support columns 211 extend along the first direction X, making them elongated. The cross-section of the second support columns 212 is rectangular, and the cross-sectional area is smaller than that of the first support column 211. The multiple second support columns 212 correspond to the upper edge 403 and lower edge 404 of the dashed line M, respectively. The first support columns 211 correspond to the left edge 401 of the dashed line M. Side plate 14 corresponds to the right edge 402 of the dashed line M.

[0067] Please see Figure 11 For example, part of the pressure relief area 20 is located in the non-module area 102, and another part is located in the module area 101, that is, part of the dashed line M falls in the area above the dashed line D, and the other part falls in the area below the dashed line D.

[0068] Part of the support pillars 21 are first support pillars 211, located in module area 101, while the other part are second support pillars 212, distributed in non-module area 102. The pressure relief area 20 is enclosed by two side plates 14, multiple first support pillars 211, and multiple second support pillars 212. The left edge 401 of the dashed line M corresponds to the multiple first support pillars 211 and multiple second support pillars 212, and the lower edge 404 of the dashed line M corresponds to the multiple first support pillars 211. The upper edge 403 and the right edge 402 of the dashed line M each correspond to one side plate 14. The pressure relief section 3 is located on the left side of the dashed line M and is independent of the support pillars 21.

[0069] Please see Figure 13In some embodiments, the first inner wall surface 11 or the second inner wall surface 12 is provided with reinforcing ribs 13 at the positions corresponding to the pressure relief area 20. Specifically, when the heating element 6 is correspondingly arranged with the first inner wall surface 11, the reinforcing rib 13 is arranged on the first inner wall surface 11; when the heating element 6 is correspondingly arranged with the second inner wall surface 12, the reinforcing rib 13 is arranged on the second inner wall surface 12. The thickness and strength of the reinforcing rib 13 can be lower than the thickness and strength of the first support column 211. Through the reinforcement effect of the reinforcing rib 13, the unreinforced one of the first inner wall surface 11 and the second inner wall surface 12 can bulge and rupture at the position corresponding to the pressure relief area 20, thus avoiding any impact on the heating element 6.

[0070] Please see Figure 13 In some embodiments, the reinforcing ribs 13 extend along a first direction X, and adjacent reinforcing ribs 13 are spaced apart to form a first flow channel 130. The working fluid within the evaporator can move directionally along the first flow channel 130 during flow, which provides a guiding path for the flow of the working fluid and reduces flow resistance. The reinforcing ribs 13 also increase the contact area with the phase change working fluid, which is beneficial for enhancing heat transfer efficiency.

[0071] Please see Figure 13 and Figure 14 For example, the plurality of first support columns 211 in the module region 101 and the reinforcing ribs 13 in the pressure relief region 20 are located in the second direction Y and are arranged at intervals along the second direction Y. Two adjacent first support columns 211 form a second flow channel 25 at intervals, and two adjacent reinforcing ribs 13 form a first flow channel 130 at intervals. When the evaporator is working, the phase change working fluid undergoes a phase change and flows in the evaporation chamber 10. The first flow channel 130 and the second flow channel 25 guide the flow direction of the working fluid. At the same time, the first flow channel 130 and the second flow channel 25 correspond to the positions of the heating element 6, and when the working fluid flows along the first flow channel 130, it can effectively remove heat from the part of the shell 1 that is in contact with the heating element 6.

[0072] In some embodiments, at least a portion of the support column 21 is a second support column 212, and the second support column 212 and the pressure relief area 20 are disposed in the non-module area 102.

[0073] Please see Figure 5 For example, the pressure relief area 20 is located in the non-module area 102, that is, the dashed line M is above the dashed line D. Each edge of the dashed line M corresponds to a second support column 212, and the second support column 212 extends along the length direction of the corresponding deformation. The second support column 212 can be an independently set structure. The pressure relief part 3 is set within the pressure relief area 20, or in other words, the pressure relief part 3 is set within the area enclosed by the dashed line M. The pressure relief part 3 is set corresponding to the upper edge 403 of the dashed line M and is independent of the second support column 212.

[0074] Please see Figure 6 For example, the pressure relief area 20 is located in the non-module area 102, that is, the dashed line M is above the dashed line D. Each edge of the dashed line M corresponds to a second support column 212, and the second support column 212 extends along the length direction of the corresponding edge. The second support column 212 can be an independently set structure. The pressure relief part 3 is located in the area enclosed by the dashed line M, corresponding to the upper edge 403 of the dashed line M. The pressure relief part 3 is integrally formed with the second support column 212 above the dashed line M.

[0075] Please see Figure 7 For example, the pressure relief area 20 is located in the non-module area 102, that is, the dashed line M is above the dashed line D. Each edge of the dashed line M corresponds to a plurality of second support columns 212, and the second support columns 212 can be independently set structures. The pressure relief part 3 is set within the pressure relief area 20, and the pressure relief part 3 is independent of the second support columns 212.

[0076] Please see Figure 8 For example, the pressure relief area 20 is located in the non-module area 102, that is, the dashed line M is above the dashed line D. Part of the support column 21 is the second support column 212, and the other part of the support column 21 is the first support column 211. The first support column 211 is distributed in the module area 101, and the first support column 211 and the second support column 212 together form the pressure relief area 20.

[0077] The left side line 401 and the bottom line 404 of the dashed line M correspond to the second support column 212 and the first support column 211, respectively. These two support columns 21 utilize the original structure of the evaporator, that is, the structure originally used by the evaporator to form the working fluid flow channel. The second support column 212, which corresponds to the upper line 403 and the right line 402 of the dashed line M, can be a separately installed structure. That is, it is a support column 21 structure added to the original structure of the evaporator to form the pressure relief area 20. This makes full use of the existing structural design of the evaporator and reduces the complexity of manufacturing.

[0078] The pressure relief section 3 is provided corresponding to the upper edge 403 of the dashed line M and is located within the pressure relief area 20. The pressure relief section 3 and the second support column 212 are independent of each other.

[0079] Please see Figure 9For example, the pressure relief region 20 is located in the non-module region 102, i.e., the dashed line M is above the dashed line D. The pressure relief region 20 is enclosed by a plurality of second support columns 212 and two side plates 14. The side plates 14 are used to form the supporting boundary of the evaporation chamber 10, and thus serve as the original structure of the evaporator. The two side plates 14 correspond to the upper edge 403 and the right edge 402 of the dashed line M, respectively. The plurality of second support columns 212 correspond to the left edge 401 and the lower edge 404 of the dashed line M, and the plurality of second support columns 212 can be independently configured. The pressure relief part 3 is configured corresponding to the upper edge 403 of the dashed line M and is integrally formed with the side plates 14.

[0080] Please see Figure 10 For example, the pressure relief area 20 is located in the non-module area 102, i.e., the dashed line M is above the dashed line D. Part of the support pillars 21 are second support pillars 212, and the other part are first support pillars 211. The first support pillars 211 are distributed in the module area 101. The first support pillars 211, second support pillars 212, and two side plates 14 together enclose the pressure relief area 20. The second support pillar 212 is located corresponding to the left edge 401 of the dashed line M, and the first support pillar 211 corresponds to the lower edge 404 of the dashed line M. The first support pillars 211 and second support pillars 212 can be the original structure of the evaporator and are arranged in a matrix on the plane formed by the first direction X and the second direction Y. The upper edge 403 and the right edge 402 of the dashed line M correspond to the two side plates 14, respectively.

[0081] The pressure relief section 3 is positioned corresponding to the lower edge 404 of the dashed line M, with one end of the pressure relief section 3 located within the pressure relief area 20 and the other end located outside the pressure relief area 20. The pressure relief section 3 can abut against the nearest first support column 211 or be integrally formed. In this example, the first support column 211 and the second support column 212 utilize the existing structural design of the evaporator, further simplifying the manufacturing process and improving resource utilization.

[0082] Please see Figure 15 In some embodiments, multiple housings 1 are provided. Multiple housings 1 are arranged along a first direction X, with adjacent housings 1 connected together. That is, multiple housings 1 are arranged sequentially in the height direction and fixed to each other to form an integral evaporator assembly. Each housing 1 has an independent evaporation chamber 10. The fixing between adjacent housings 1 can be achieved by welding, brazing, threaded fastener connection, snap-fit ​​connection, or adhesive bonding, so that the contact surfaces of adjacent housings 1 are in contact with each other.

[0083] By increasing the number of housings 1, the total volume of the evaporation chamber 10 can be increased to accommodate the heat dissipation requirements of heating elements 6 with different power levels or different sizes.

[0084] In other embodiments, after multiple housings 1 are connected, the evaporation chambers 10 of each housing 1 can be interconnected. In this case, adjacent housings 1 are provided with connecting holes or channels at the connection points, allowing the phase change working fluid to flow between the evaporation chambers 10 of different housings 1, forming a unified working fluid circulation system. This interconnected structure helps to balance the pressure and working fluid distribution within each evaporation chamber 10.

[0085] In some embodiments, multiple evaporation chambers 10 are provided, and the multiple evaporation chambers 10 are independent of each other. Each evaporation chamber 10 is provided with a pressure relief area 20 structure to achieve independent explosion relief.

[0086] Specifically, multiple evaporation chambers 10 can be housed within the same housing 1, with the space within the housing 1 divided into multiple independent chambers by internal partitions or separating structures. The phase change working fluids within the multiple evaporation chambers 10 are not interconnected, and the pressure, temperature, and working fluid of each evaporation chamber 10 can be independently controlled. The multiple evaporation chambers 10 can be thermally connected to different heating elements 6 respectively, reducing mutual thermal interference.

[0087] According to a second aspect of this disclosure, a power conversion device is provided; please refer to [reference needed]. Figure 1 The power conversion device includes a heating element 6, a condenser 5, and an evaporator as described in the above embodiment. The condenser 5 is disposed on one side of the evaporator and is interconnected with it. The heating element 6 is thermally connected to the side of the evaporator away from the condenser 5. The evaporator is used to absorb the heat generated by the heating element 6.

[0088] During operation, the phase change working fluid inside the evaporator absorbs heat and undergoes a phase change, transforming from a liquid to a gaseous state. The gaseous working fluid flows out of the evaporator and enters condenser 5. Condenser 5 is used to cool the gaseous working fluid, causing it to release heat and re-condense into a liquid state. The condensed liquid working fluid then flows back to the evaporator, completing one cycle.

[0089] The condenser 5 is installed higher than the evaporator so that the liquid working fluid in the condenser 5 can flow back to the evaporator by gravity. In the first implementation, the condenser 5 and the evaporator are independent of each other and connected by a pipe, with the gaseous and liquid working fluids flowing through separate pipes. In the second implementation, the condenser 5 is connected to the side wall of the evaporator, and the two are connected at the contact point. The bottom of the condenser 5 is connected to the evaporator via a return pipe, so that the liquid working fluid in the condenser 5 flows back to the evaporation chamber 10 through the return pipe. In the third implementation, the condenser 5 is connected to the side wall of the evaporator, and a communication port is provided at the contact point between the two, through which the phase change working fluid flows.

[0090] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0091] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0092] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An evaporator, characterized in that, include: The housing (1) has an evaporation chamber (10), the housing (1) including opposing first inner wall surfaces (11) and second inner wall surfaces (12); Multiple support structures (2) and pressure relief parts (3) are connected between the first inner wall surface (11) and the second inner wall surface (12). Part of the support structures (2) enclose a pressure relief area (20), which is connected to the evaporation chamber (10). The strength of the pressure relief area (20) is less than the strength of the area where the remaining support structures (2) are located. The pressure relief part (3) is disposed in the pressure relief area (20), and the pressure relief part (3) is disposed close to a support structure (2) that encloses and forms the pressure relief area (20).

2. The evaporator according to claim 1, characterized in that, Part of the support structure (2) is configured as a plurality of support columns (21), the plurality of support columns (21) enclosing the pressure relief area (20), and at least one of the support columns (21) forms an opening (210) between it and the adjacent support column (21).

3. The evaporator according to claim 2, characterized in that, The housing (1) includes a plurality of side plates (14), which are arranged around the outer periphery of the first inner wall surface (11) and the second inner wall surface (12); At least one of the side plates (14) is configured as the support structure (2) and together with a plurality of the support columns (21) forms the pressure relief area (20).

4. The evaporator according to claim 3, characterized in that, The evaporation chamber (10) includes a modular region (101) and a non-modular region (102); At least a portion of the support column (21) is a first support column (211), and the first support column (211) and at least a portion of the pressure relief area (20) are disposed in the module area (101).

5. The evaporator according to claim 4, characterized in that, The first inner wall surface (11) or the second inner wall surface (12) is provided with reinforcing ribs (13) at the position corresponding to the pressure relief area (20). The reinforcing ribs (13) extend along the first direction (X), and two adjacent reinforcing ribs (13) are spaced apart to form a first flow channel (130).

6. The evaporator according to claim 3, characterized in that, The evaporation chamber (10) includes a modular region (101) and a non-modular region (102); At least a portion of the support column (21) is a second support column (212), and the second support column (212) and the pressure relief area (20) are located in the non-module area (102).

7. The evaporator according to claim 1, characterized in that, One end of the pressure relief part (3) is disposed within the pressure relief area (20), and the other end of the pressure relief part (3) is disposed outside the pressure relief area (20).

8. The evaporator according to claim 1, characterized in that, The minimum gap between the pressure relief part (3) and the adjacent support structure (2) is H mm, which satisfies: 0 ≤ H ≤ 10 mm.

9. The evaporator according to claim 1, characterized in that, The support structure (2) that encloses the pressure relief area (20) has a first side (23) and a second side (24) facing each other. The pressure relief part (3) includes a first pressure relief edge (31), which is located between the first side (23) and the second side (24). The vertical distance between the first pressure relief edge (31) and the first side (23) is less than the vertical distance between the first pressure relief edge (31) and the second side (24).

10. The evaporator according to claim 9, characterized in that, The pressure relief section (3) is independently provided from the support structure (2) that forms the first side (23).

11. The evaporator according to claim 9, characterized in that, The support structure (2) forming the first side (23) has a protrusion extending toward the pressure relief area (20), the protrusion being configured as the pressure relief portion (3).

12. The evaporator according to claim 1, characterized in that, The number of the shells (1) is provided in multiples, and the multiple shells (1) are arranged along the first direction (X), and two adjacent shells (1) are connected; Alternatively, the number of evaporation chambers (10) may be multiple, and the multiple evaporation chambers (10) may be independent of each other.

13. A power conversion device, characterized in that, include: Heating element (6); Condenser (5); In the evaporator as described in any one of claims 1 to 12, the condenser (5) is disposed on one side of the evaporator and is interconnected with it, and the heating element (6) is thermally connected to the side of the evaporator away from the condenser (5).

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