Plate-fin heat exchanger core and heat exchanger device
By setting up staggered hollow parts and expansion gaps in the core of the plate-fin heat exchanger, the problem of easy deformation or cracking of the plate-fin heat exchanger during work is solved, and higher equipment stability and service life are achieved.
Patent Information
- Application Number
- CN202421739596.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The plate-fin heat exchanger is prone to deformation or cracking during operation, resulting in the failure of the equipment.
A plate-fin heat exchanger core is designed, and the expansion gap is provided in each layer of the heat exchange unit and the staggered hollow parts are provided in two adjacent layers to increase the support strength of the heat exchange fins to the partition.
It effectively reduces the deformation or breakage of the plate-fin heat exchanger during operation, and improves the stability and service life of the equipment.
Smart Images
Figure CN222887514U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, and particularly relates to a plate-fin heat exchanger core and a heat exchanger device Background Art
[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid, also known as a heat exchanger. Heat exchangers play an important role in many industrial productions such as chemical industry, petroleum, power, food and others. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators, reboilers, etc., and are widely applied. There are various types of heat exchangers, and the plate-fin heat exchanger is one of them
[0003] The plate-fin heat exchanger includes multiple layers of heat exchange units. Each layer of heat exchange unit has multiple groups of fins. A certain gap is left between each group of fins to ensure installation requirements and offset the thermal expansion between the fins at high temperatures. However, the fin gaps of different layers of heat exchange units are arranged in alignment, resulting in obvious strength weak areas on the partition plate along the thickness direction of the plate-fin heat exchanger (i.e., the positions where the partition plate is not supported by fins at all), making the heat exchanger partition plate prone to plastic deformation or even rupture during the process of working condition change, leading to the failure of the plate-fin heat exchanger
[0004] Therefore, how to effectively reduce the deformation or rupture of the plate-fin heat exchanger during operation has become an urgent technical problem in this field Summary of the Utility Model
[0005] The purpose of the utility model is to at least solve the technical problem of how to effectively reduce the deformation or rupture of the plate-fin heat exchanger during operation. This purpose is achieved through the following technical solutions
[0006] In a first aspect, the utility model provides a plate-fin heat exchanger core, which includes multiple layers of heat exchange units arranged along a first direction. A partition plate is provided between every two adjacent layers of heat exchange units. Each layer of heat exchange unit includes a fin assembly, and the fin assembly includes at least two heat exchange fins spaced along a second direction. The second direction is perpendicular to the first direction. The heat exchange fins are used to support the partition plate adjacent to the heat exchange fins themselves in the first direction. An expansion gap is provided between two adjacent heat exchange fins. The number of expansion gaps in multiple layers of heat exchange units is the same, and the expansion gaps in each layer of heat exchange unit and the expansion gaps in the adjacent heat exchange unit are arranged in one-to-one correspondence. For any two corresponding expansion gaps in two adjacent layers of heat exchange units, there is a set distance between the two expansion gaps along the second direction
[0007] For this plate-fin heat exchanger core, for any two corresponding expansion gaps in any two adjacent heat exchange units, there is a set distance between the two expansion gaps along the second direction; that is to say, the two corresponding expansion gaps in each two adjacent heat exchange units are offset in the first direction. Therefore, along the first direction, there is no part of the plate-fin heat exchanger core that is completely hollowed out (i.e., there is no support from heat exchange fins), but only a section of the hollowed-out part exists in each layer of heat exchange units, and the hollowed-out parts of adjacent layers of heat exchange units are offset in the first direction, thereby effectively improving the support strength of the heat exchange fins for the partition plates, and further effectively reducing the deformation or rupture of the plate-fin heat exchanger during operation.
[0008] In some embodiments of the present invention, each fin assembly includes two heat exchange fins, which are respectively a first fin and a second fin, and an expansion gap is formed between the first fin and the second fin.
[0009] In some embodiments of the present invention, in each layer of heat exchange units, the end of the first fin close to the second fin is the first end of the gap, and the end of the second fin close to the first fin is the second end of the gap; in any two adjacent layers of heat exchange units, along the second direction, the distance between the two first ends of the gaps is the set distance, and the distance between the two second ends of the gaps is the set distance.
[0010] In some embodiments of the present invention, the range of the expansion gap is 0.8 mm - 1.2 mm.
[0011] In some embodiments of the present invention, the range of the set distance is 1 mm - 5 mm.
[0012] In some embodiments of the present invention, the heat exchange fin is welded to the partition plate adjacent to the heat exchange fin itself in the first direction.
[0013] In some embodiments of the present invention, each layer of heat exchange units further includes side strips, and the side strips are disposed around the outer side of the fin assembly along the circumferential direction of the fin assembly.
[0014] In some embodiments of the present invention, in each layer of heat exchange units, the fin assembly further includes a first flow guiding fin and a second flow guiding fin. Along the second direction, the first flow guiding fin and the second flow guiding fin are respectively located on both sides of the heat exchange fin, and the first flow guiding fin and the second flow guiding fin are used to cooperate with the heat exchange fin to transport the heat exchange medium between adjacent two layers of heat exchange units.
[0015] In some embodiments of the present invention, the plate-fin heat exchanger core further includes two side plates, and along the first direction, the two side plates are respectively installed on both sides of the plate-fin heat exchanger core.
[0016] In a second aspect, the present utility model provides a heat exchanger device, which includes a housing and any one of the above plate-fin heat exchanger cores, and the plate-fin heat exchanger core is located in the accommodation cavity of the housing.
[0017] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific implementation manners of the present application. Brief Description of the Drawings
[0018] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:
[0019] Figure 1 is a schematic structural diagram of the plate-fin heat exchanger core provided by an embodiment of the present utility model;
[0020] Figure 2 is an exploded view of a partial structure of the plate-fin heat exchanger core provided by an embodiment of the present utility model;
[0021] Figure 3 is a schematic diagram of the positions of the expansion gap and the set spacing in the plate-fin heat exchanger core provided by an embodiment of the present utility model;
[0022] Figure 4 is a schematic diagram of the flow direction of the cooling medium in adjacent two layers of heat exchange units in the plate-fin heat exchanger core provided by an embodiment of the present utility model;
[0023] Figure 5 is a schematic diagram of the plate-fin heat exchanger core provided by an embodiment of the present utility model at an angle.
[0024] The reference numerals are as follows:
[0025] 100, plate-fin heat exchanger core;
[0026] 1, heat exchange unit; 11, fin assembly; 111, heat exchange fin; 1111, first fin; 1112, second fin; 112, first guide fin; 1121, first guide fin A; 1122, first guide fin B; 113, second guide fin; 1131, second guide fin A; 1132, second guide fin B; 12, side strip; 121, L-shaped plate;
[0027] 2, partition;
[0028] 3, side plate;
[0029] a, expansion gap;
[0030] b, set spacing. Detailed implementation manner
[0031] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.
[0032] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.
[0033] Although the terms first, second, third, etc. may be used in this document to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may only be used to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.
[0034] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure with respect to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation other than the orientations depicted in the figure. For example, if the device in the figure is flipped, then an element described as "below" or "beneath" other elements or features will subsequently be oriented as "above" or "over" other elements or features. Thus, the example term "below" can include both the upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.
[0035] Figure 1 Schematic structural view of the plate-fin heat exchanger core provided by the embodiment of the present utility model; Figure 2 Exploded view of a partial structure of the plate-fin heat exchanger core provided by the embodiment of the present utility model; Figure 3 Schematic view of the positions of the expansion gap and the set spacing in the plate-fin heat exchanger core provided by the embodiment of the present utility model; Refer to Figures 1 - 3 In this regard, the embodiment of the present utility model provides a plate-fin heat exchanger core 100, which includes multiple heat exchange units 1 arranged along a first direction, and a partition 2 is provided between every two adjacent layers of heat exchange units 1; each layer of heat exchange unit 1 includes a fin assembly 11, and the fin assembly 11 includes at least two heat exchange fins 111 spaced apart along a second direction, the second direction is perpendicular to the first direction, and the heat exchange fins 111 are used to support the partition 2 adjacent to the heat exchange fins 111 themselves in the first direction, and there is an expansion gap a between two adjacent heat exchange fins 111; the number of expansion gaps a in multiple layers of heat exchange units 1 is the same, and the expansion gaps a in each layer of heat exchange unit 1 and the expansion gaps a in the adjacent heat exchange unit 1 are arranged in one-to-one correspondence; for any two corresponding expansion gaps a in two adjacent layers of heat exchange units 1, there is a set spacing b between the two expansion gaps a along the second direction.
[0036] Among them, it is easy to understand that the first direction is the thickness direction of the plate-fin heat exchanger core 100, and the second direction is the length direction of the plate-fin heat exchanger core 100.
[0037] In this embodiment, for the fin-and-tube heat exchanger core 100, for any two corresponding expansion gaps a in any adjacent two heat exchange units 1, there is a set distance b between the two expansion gaps a along the second direction; that is to say, the two corresponding expansion gaps a in any adjacent two heat exchange units 1 are staggered in the first direction. Therefore, along the first direction, there is no part of the fin-and-tube heat exchanger core 100 that is completely hollowed out (i.e., there is no support of the heat exchange fins 111), but only a part of each layer of the heat exchange unit 1 that is hollowed out, and the hollowed-out part of this layer is staggered from the hollowed-out part of the adjacent layer of the heat exchange unit 1 in the first direction, thereby effectively improving the support strength of the heat exchange fins 111 for the partition plate 2, and further effectively reducing the deformation or rupture of the fin-and-tube heat exchanger during operation.
[0038] As Figure 2 and Figure 3 shown, according to an optional embodiment of the present invention, each fin assembly 11 includes two heat exchange fins 111, and the two heat exchange fins 111 are respectively a first fin 1111 and a second fin 1112, and an expansion gap a is formed between the first fin 1111 and the second fin 1112.
[0039] In this embodiment, for the convenience of description, it is only an example that each fin assembly 11 includes two heat exchange fins 111. Each fin assembly 11 may include more heat exchange fins 111, such as three, four, five or more, specifically depending on the actual working conditions, and the number of heat exchange fins 111 is not limited.
[0040] Referring to Figure 3 , specifically, according to an optional embodiment of the present invention, in each layer of the heat exchange unit 1, the end of the first fin 1111 close to the second fin 1112 is the first end of the gap, and the end of the second fin 1112 close to the first fin 1111 is the second end of the gap; in any adjacent two layers of the heat exchange unit 1, along the second direction, the distance between the two first ends of the gaps is the set distance b, and the distance between the two second ends of the gaps is the set distance b.
[0041] In this embodiment, continuing to take the example that each fin assembly 11 includes two heat exchange fins 111, since in any adjacent two layers of the heat exchange unit 1, along the second direction, the distance between the two first ends of the gaps is the set distance b, and the distance between the two second ends of the gaps is the set distance b, it shows that the sizes of the two corresponding expansion gaps a in any adjacent two layers in the second direction are the same, which is convenient for unified production standards and also improves the force uniformity of each layer of the partition plate 2 to a certain extent.
[0042] It is easy to understand that when each fin assembly 11 includes a plurality (three or more) of heat exchange fins 111, in order to ensure the uniform stress of each layer of partition plate 2, the dimensions of the plurality of expansion gaps a in each layer in the second direction can be made the same.
[0043] According to an optional embodiment of the present invention, the range of the expansion gap a is 0.8 mm - 1.2 mm.
[0044] In this embodiment, since it is necessary to offset the thermal expansion between the heat exchange fins 111 at high temperatures, the size of the expansion gap a cannot be too small. Through simulation data simulation, it is obtained that when the range of the expansion gap a is 0.8 mm - 1.2 mm, the partition plate 2 has a higher strength. For example, when the dimensions of the plurality of expansion gaps a in each layer in the second direction are the same, this dimension can be selected as 1 mm.
[0045] According to an optional embodiment of the present invention, the range of the set spacing b is 1 mm - 5 mm.
[0046] In this embodiment, similarly, on the premise that the range of the expansion gap a is 0.8 mm - 1.2 mm, through simulation data simulation, it is obtained that when the range of the set spacing b is 1 mm - 5 mm, the partition plate 2 has a higher strength. For example, the set spacing b can be 2 mm.
[0047] According to an optional embodiment of the present invention, the heat exchange fin 111 is welded to the partition plate 2 adjacent to the heat exchange fin 111 itself in the first direction.
[0048] In this embodiment, the welding method of the heat exchange fin 111 and the partition plate 2 is convenient for controlling the size of the expansion gap a. For example, the heat exchange fin 111 can be first connected to the partition plate 2 by spot welding, and then brazing or diffusion welding is carried out.
[0049] As Figure 2 shown, according to an optional embodiment of the present invention, each layer of the heat exchange unit 1 further includes a side strip 12, and the side strip 12 is disposed around the outer side of the fin assembly 11 along the circumferential direction of the fin assembly 11.
[0050] In this embodiment, the side strip 12 can play a role in fixing and protecting the fin assembly 11. In the first direction, the adjacent two layers of side strips 12 can be welded to each other; for example, the adjacent two layers of side strips 12 in the first direction can be connected by brazing or diffusion welding.
[0051] Figure 4 is a schematic diagram of the flow direction of the cooling medium in the adjacent two layers of heat exchange units in the plate-fin heat exchanger core body provided by the embodiment of the present invention; Figure 5 is a schematic diagram of the plate-fin heat exchanger core body provided by the embodiment of the present invention at an angle; with reference to Figure 4 andFigure 5 According to an alternative embodiment of the present utility model, in each heat exchange unit 1, the fin assembly 11 further includes a first flow guiding fin 112 and a second flow guiding fin 113. Along the second direction, the first flow guiding fin 112 and the second flow guiding fin 113 are respectively located on both sides of the heat exchange fin 111. The first flow guiding fin 112 and the second flow guiding fin 113 are used to cooperate with the heat exchange fin 111 to transport the heat exchange medium between adjacent two layers of heat exchange units 1.
[0052] In this embodiment, the side strip 12 may include two L-shaped plates 121. The two L-shaped plates 121 surround the outside of the fin assembly 11, and part of the first flow guiding fin 112 and the second flow guiding fin 113 of the fin assembly 11 is exposed at the side, that is, the two L-shaped plates 121 are not spliced into a closed loop structure that is connected end to end.
[0053] In addition, as Figure 4 shown, the first flow guiding fin 112 may include a first flow guiding fin A 1121 and a first flow guiding fin B 1122, and the second flow guiding fin 113 may include a second flow guiding fin A 1131 and a second flow guiding fin B 1132.
[0054] Combined with Figure 4 and Figure 5 it can be known that in the Figure 5 shown direction, the second flow guiding fin B 1132 in each layer of heat exchange unit 1 is not blocked by the L-shaped plate 121 and can be exposed, so as to be connected to the first flow guiding fin A 1121 in the adjacent heat exchange unit 1. It is easy to understand that the first flow guiding fin A 1121 in each layer of heat exchange unit 1 is also not blocked by the L-shaped plate 121 and can be exposed, so as to be connected to the second flow guiding fin B 1132 in the adjacent heat exchange unit 1, except that Figure 5 the exposed first flow guiding fin A 1121 cannot be seen in the
[0055] Therefore, this way can realize the heat transfer between different layers of heat exchange units 1. The flow directions of the cooling medium in the adjacent two layers of heat exchange units are as shown by the arrows in Figure 5 .
[0056] As Figure 1 and Figure 2 shown, according to an alternative embodiment of the present utility model, the plate fin heat exchanger core 100 further includes two side plates 3. Along the first direction, the two side plates 3 are respectively installed on both sides of the plate fin heat exchanger core 100.
[0057] In this embodiment, it is easy to understand that in the heat exchange unit 1 layers on both sides along the first direction, the heat exchange fins 111 can also play a supporting role for the side plates 3.
[0058] An embodiment of the present utility model further provides a heat exchanger device, which includes a housing and any one of the above-mentioned plate-fin heat exchanger cores 100, and the plate-fin heat exchanger core 100 is located in the accommodation cavity of the housing.
[0059] In this embodiment, the beneficial effects of the heat exchanger device are the same as those of any one of the above-mentioned plate-fin heat exchanger cores 100, that is, the support strength of the heat exchange fins 111 for the partition plate 2 can be effectively improved, thereby effectively reducing the deformation or rupture of the plate-fin heat exchanger during operation. Details are not described herein again.
[0060] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered by the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims
1. A plate-fin heat exchanger core, characterized in that: It comprises multiple layers of heat exchange units arranged along a first direction, and a partition is provided between each two adjacent layers of the heat exchange units; Each layer of the heat exchange unit includes a fin assembly, the fin assembly includes at least two heat exchange fins spaced apart along a second direction, the second direction is perpendicular to the first direction, the heat exchange fin is used to support a partition adjacent to the heat exchange fin itself in the first direction, and an expansion gap is provided between two adjacent heat exchange fins; The number of expansion gaps in the multiple layers of heat exchange units is the same, and the expansion gaps in each layer of heat exchange units are arranged in one-to-one correspondence with the expansion gaps in the adjacent heat exchange units; For two expansion gaps corresponding to each other in any two adjacent layers of heat exchange units, there is a set distance between the two expansion gaps along the second direction.
2. The plate-fin heat exchanger core according to claim 1, characterized in that: Each of the fin assemblies includes two heat exchange fins, the two heat exchange fins are respectively a first fin and a second fin, and the expansion gap is formed between the first fin and the second fin.
3. The plate-fin heat exchanger core according to claim 2, characterized in that: In each layer of the heat exchange unit, one end of the first fin close to the second fin is a first end of the gap, and one end of the second fin close to the first fin is a second end of the gap; In any two adjacent layers of heat exchange units, along the second direction, the distance between the first ends of the two gaps is the set spacing, and the distance between the second ends of the two gaps is the set spacing.
4. The plate-fin heat exchanger core according to claim 1, characterized in that: The expansion gap ranges from 0.8 mm to 1.2 mm.
5. The plate-fin heat exchanger core according to claim 4, characterized in that: The range of the set spacing is 1mm-5mm.
6. The plate-fin heat exchanger core according to claim 1, characterized in that: The heat exchange fin is welded to a partition plate adjacent to the heat exchange fin in the first direction.
7. The plate-fin heat exchanger core according to any one of claims 1 to 6, characterized in that: Each layer of the heat exchange unit also includes a side strip, and the side strip is arranged around the circumference of the fin assembly on the outside of the fin assembly.
8. The plate-fin heat exchanger core according to claim 7, characterized in that: In each layer of the heat exchange unit, the fin assembly also includes a first guide fin and a second guide fin. Along the second direction, the first guide fin and the second guide fin are respectively located on both sides of the heat exchange fin. The first guide fin and the second guide fin are used to cooperate with the heat exchange fin to transport the heat exchange medium between two adjacent layers of the heat exchange units.
9. The plate-fin heat exchanger core according to claim 7, characterized in that: The plate-fin heat exchanger core also includes two side plates. Along the first direction, the two side plates are respectively installed on both sides of the plate-fin heat exchanger core.
10. A heat exchanger device, characterized in that: It comprises a shell and a plate-fin heat exchanger core as described in any one of claims 1 to 9, wherein the plate-fin heat exchanger core is located in a containing cavity of the shell.