Heat exchanger

Abstract

The invention provides a heat exchanger. The heat exchanger comprises a substrate; the heat exchange layer is arranged on one side of the base plate, the heat exchange layer comprises multiple sets of heat exchange units, the multiple sets of heat exchange units are arranged at intervals in the first direction, a first heat exchange channel is formed between every two adjacent sets of heat exchange units in a clamped mode, each set of heat exchange unit comprises at least two fins, and the at least two fins are distributed at intervals in the second direction; in the second direction, at least two fins are arranged in a staggered manner; wherein the first direction is different from the second direction. According to the heat exchanger, the two fins in the second direction are staggered, gas can be scattered by the fins distributed in the staggered mode, the flowing resistance and disorder degree are increased, the retention time of the gas in the heat exchange channel is prolonged, then the heat exchange time of the gas and the fins is prolonged, and therefore the heat exchange efficiency is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of heat exchangers, and in particular, relates to a heat exchanger. Background Art

[0002] A heat exchanger is a device used to transfer heat between fluids and is widely used in processes such as heating, cooling, evaporation, and condensation. Finned heat exchangers are one of the most common types of heat exchangers, used to exchange heat between air and other fluids.

[0003] Existing fin heat exchangers usually include a base plate and a plurality of fins arranged at intervals in a certain direction. Two adjacent fins are sandwiched to form a flow channel for gas to flow through. When the gas flows through the flow channel, heat exchange occurs with the fins. Since there are fewer obstacles in the flow channel after the gas enters the heat exchanger, the resistance is small and the flow rate is fast, which leads to a shorter heat exchange time and lower heat exchange efficiency. Summary of the invention

[0004] The embodiment of the present application provides a heat exchanger to solve the problem that the flow channel of the existing fin-type heat exchanger has fewer obstacles, so the airflow resistance is small and the flow rate is fast, which in turn leads to a short heat exchange time and low heat exchange efficiency.

[0005] The present application provides a heat exchanger, comprising:

[0006] substrate;

[0007] A heat exchange layer is arranged on one side of the substrate, the heat exchange layer comprises a plurality of groups of heat exchange units, the plurality of groups of heat exchange units are arranged at intervals along a first direction, a first heat exchange channel is formed between two adjacent groups of heat exchange units, each group of heat exchange units comprises at least two fins, at least two of the fins are spaced apart along a second direction, and in the second direction, at least two of the fins are staggered;

[0008] The first direction and the second direction are different.

[0009] Optionally, in the second direction, the lengths of two adjacent fins are different.

[0010] Optionally, each of the fins is penetrated by a spoiler hole, and each of the spoiler holes is connected to two adjacent first heat exchange channels.

[0011] Optionally, in the second direction, the spoiler holes on two adjacent fins have different apertures.

[0012] Optionally, in the first direction, the spoiler holes on two adjacent fins have different apertures.

[0013] Optionally, in the first direction, the spoiler holes on two adjacent fins are staggered.

[0014] Optionally, each group of the heat exchange units includes a plurality of fin groups, each of the fin groups includes four fins, and the length ratio of the four fins is 9:8:5:4.

[0015] Optionally, the fin comprises:

[0016] A first side plate connected to the base plate;

[0017] a second side plate connected to the base plate and arranged opposite to the first side plate;

[0018] A top plate, connecting the first side plate and the second side plate, and arranged opposite to the base plate;

[0019] The first side plate, the second side plate, the base plate and the top plate are arranged to form a second heat exchange channel, and in the second direction, two adjacent second heat exchange channels are at least partially connected.

[0020] Optionally, in the second direction, widths of two adjacent second heat exchange channels are different.

[0021] Optionally, the heat exchange layer includes two groups, and the two groups of heat exchange layers are arranged oppositely on two sides of the substrate.

[0022] In the heat exchanger provided in the embodiment of the present application, the heat exchange layer of the substrate includes a plurality of groups of heat exchange units spaced apart along a first direction, each group of heat exchange units includes at least two fins spaced apart along a second direction, and at least two fins are staggered in the second direction, that is, in the heat exchange channel formed by two adjacent groups of heat exchange units, since the two fins are staggered relative to each other in the second direction, the heat exchange channel does not extend in a straight line in the second direction, but is formed by connecting a plurality of flow channels that are at least partially staggered relative to each other, that is, when the gas flows from between the two upstream fins to between the two adjacent downstream fins, the gas will be broken up by the staggered fins, and then turbulence will be formed within a certain range. At the same time, the flow velocity of the gas at different positions in the heat exchange channel will also be different, which will increase the flow resistance and disorder, prolong the residence time of the gas in the heat exchange channel, and then prolong the heat exchange time between the gas and the fins, thereby improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0024] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0025] Figure 1 A schematic diagram of the structure of a heat exchanger provided in an embodiment of the present application.

[0026] Figure 2 A schematic diagram of the connection between the substrate and the heat exchange layer of the heat exchanger provided in an embodiment of the present application.

[0027] Figure 3 A schematic diagram of the structure of the spoiler hole of the heat exchanger provided in an embodiment of the present application.

[0028] Figure 4 Another schematic diagram of the structure of the spoiler hole of the heat exchanger provided in an embodiment of the present application.

[0029] Figure 5 A temperature field comparison diagram of the heat exchanger in the second direction provided in an embodiment of the present application.

[0030] Figure 6 Another temperature field comparison diagram of the heat exchanger in the second direction provided in an embodiment of the present application.

[0031] Figure 7 Another temperature field comparison diagram of the heat exchanger in the second direction provided in an embodiment of the present application.

[0032] Figure 8 Another temperature field comparison diagram of the heat exchanger in the second direction provided in an embodiment of the present application.

[0033] Fig. 9 A velocity field comparison diagram of the heat exchanger in the second direction provided in an embodiment of the present application.

[0034] Fig.10 Another velocity field comparison diagram of the heat exchanger in the second direction provided in an embodiment of the present application.

[0035] Fig.11 Another velocity field comparison diagram of the heat exchanger in the second direction provided in an embodiment of the present application.

[0036] Fig.12 Another velocity field comparison diagram of the heat exchanger in the second direction provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0042] The embodiment of the present application provides a heat exchanger to solve the problem that there are fewer obstacles in the flow channel of the existing fin-type heat exchanger, so the airflow resistance is small and the flow rate is fast, which in turn leads to a short heat exchange time and low heat exchange efficiency. The following will be explained in conjunction with the accompanying drawings.

[0043] The heat exchanger provided in the embodiment of the present application is shown in Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the heat exchanger provided in the embodiment of the present application. Figure 2 A schematic diagram of the connection between the substrate and the heat exchange layer of the heat exchanger provided in an embodiment of the present application, wherein the heat exchanger comprises a substrate 1 and a heat exchange layer. The heat exchange layer is arranged on one side of the substrate 1, and the heat exchange layer comprises a plurality of groups of heat exchange units, wherein the plurality of groups of heat exchange units are arranged at intervals along a first direction, and a first heat exchange channel 3 is formed between two adjacent groups of heat exchange units, wherein each group of heat exchange units comprises at least two fins 2, wherein at least two fins 2 are spaced apart along a second direction, and in the second direction, at least two fins 2 are staggered; wherein the first direction and the second direction are different.

[0044] In the heat exchanger provided in the embodiment of the present application, the heat exchange layer of the substrate 1 includes a plurality of groups of heat exchange units spaced apart along a first direction, each group of heat exchange units includes at least two fins 2 spaced apart along a second direction, and at least two fins 2 are staggered in the second direction, that is, in the heat exchange channel formed by two adjacent groups of heat exchange units, since the two fins 2 are staggered relative to each other in the second direction, the heat exchange channel does not extend in a straight line in the second direction, but is formed by connecting a plurality of flow channels that are at least partially staggered relative to each other, that is, when the gas flows from between the two upstream fins 2 to between the two adjacent downstream fins 2, the gas will be dispersed by the staggered fins 2, and then turbulence will be formed within a certain range. At the same time, the flow velocity of the gas at different positions in the heat exchange channel will also be different, which will increase the flow resistance and disorder, prolong the residence time of the gas in the heat exchange channel, and then prolong the heat exchange time between the gas and the fins 2, thereby improving the heat exchange efficiency.

[0045] It is understandable that the gas flows along the second direction, and the inlet and outlet of the gas flow are not further limited here. According to specific usage, the inlet and outlet can be respectively set at one end and the other end of each group of heat exchange units along the second direction.

[0046] Optionally, the second direction may be perpendicular to the first direction.

[0047] Optionally, in the second direction, the lengths of two adjacent fins 2 are different. Since the lengths of two adjacent fins 2 in the second direction are different, the disorder of the gas flowing in the heat exchange channel is increased, the range of the formed turbulence is further increased, the retention time of the gas in the heat exchange channel is prolonged, and the heat exchange time between the gas and the fins 2 is prolonged, thereby improving the heat exchange efficiency.

[0048] Optionally, each heat exchange unit includes multiple fin groups 2, and each fin group 2 includes four fins 2. By performing heat exchange simulation on fins 2 with different length ratios, a large amount of experimental data on temperature field and velocity field is obtained. Only part of the experimental results are shown below. Figures 5 to 8 ,in, Figure 5 Each corresponding fin 2 group includes four fins 2, and the length ratio of the four fins 2 is 12:7:4:3, that is, the arrangement of the fins 2 can be 12mm, 7mm, 4mm, and 3mm. Figure 6 Each corresponding fin 2 group includes four fins 2, and the length ratio of the four fins 2 is 4:5:8:9, that is, the arrangement of the fins 2 can be 4mm, 5mm, 8mm, and 9mm. Figure 7 Each corresponding fin 2 group includes four fins 2, and the length ratio of the four fins 2 is 6.5:6.5:6.5:6.5, that is, the arrangement of the fins 2 can be 6.5mm, 6.5mm, 6.5mm, Figure 8 Each corresponding fin 2 group includes four fins 2, and the length ratio of the four fins 2 is 9:8:5:4, that is, the arrangement of the fins 2 can be 9mm, 8mm, 5mm, and 4mm. As can be seen from the figure, when the arrangement of the fins 2 is 4mm, 5mm, 8mm, and 9mm, there are different temperature gradients near the upstream fins 2 and the downstream fins 2. When the arrangement of the fins 2 increases from 4mm, 5mm, 8mm, and 9mm to 12mm, 7mm, 4mm, and 3mm, this phenomenon shows a trend of first increasing and then decreasing, and is the largest when the arrangement of the fins 2 is 9mm, 8mm, 5mm, and 4mm, which leads to a larger heat exchange temperature difference, improves the driving force of heat exchange, and the gradient of the temperature field at this time is more gentle, which is more conducive to the synergy of the field.

[0049] See also Figures 9 to 12 ,in, Fig. 9Each corresponding fin 2 group includes four fins 2, and the length ratio of the four fins 2 is 12:7:4:3, that is, the arrangement of the fins 2 can be 12mm, 7mm, 4mm, and 3mm. Fig.10 Each corresponding fin 2 group includes four fins 2, and the length ratio of the four fins 2 is 4:5:8:9, that is, the arrangement of the fins 2 can be 4mm, 5mm, 8mm, and 9mm. Fig.11 Each corresponding fin 2 group includes four fins 2, and the length ratio of the four fins 2 is 6.5:6.5:6.5:6.5, that is, the arrangement of the fins 2 can be 6.5mm, 6.5mm, 6.5mm, Fig.12 Each corresponding fin 2 group includes four fins 2, and the length ratio of the four fins 2 is 9:8:5:4, that is, the arrangement of the fins 2 can be 9mm, 8mm, 5mm, and 4mm. It can be seen from the figure that when the fin 2 is arranged in 9mm, 8mm, 5mm, and 4mm, the recirculation effect near the downstream fin 2 is more obvious, and a recirculation area and a high-speed area where the boundary layer reattaches are generated. In addition, as the speed increases, the boundary layer near the fin 2 will fall off faster.

[0050] Through the above comparative analysis, it can be known that 9:8:5:4 is the preferred length setting ratio of the fins 2. When the multiple fins 2 of each group of heat exchange units are divided into multiple fin 2 groups according to this ratio, the heat exchange effect of the heat exchanger is optimal.

[0051] Optionally, each fin 2 is provided with a spoiler hole 24, and each spoiler hole 24 is connected to two adjacent first heat exchange channels 3. By providing the spoiler hole 24, the two adjacent heat exchange channels can be connected through the spoiler hole 24, that is, the gas in the heat exchange channel will flow out laterally from the spoiler hole 24, so that the gas will flow laterally and generate vortices, which is conducive to destroying the boundary layer between adjacent heat exchange channels and improving the overall heat exchange effect of the heat exchanger.

[0052] The shape of the spoiler hole 24 is not further limited here, for example, it can be circular, see Figure 3 , Figure 3 A schematic diagram of a structure of a spoiler hole of a heat exchanger provided in an embodiment of the present application, or a special shape, please refer to Figure 4 , Figure 4 Another structural schematic diagram of the spoiler hole of the heat exchanger provided in an embodiment of the present application, or an elliptical shape, etc.

[0053] Optionally, the size of each fin 2 is proportional to the aperture of the spoiler hole 24 on the fin 2, that is, the longer the fin 2, the larger the aperture of the spoiler hole 24, and the shorter the fin 2, the smaller the aperture of the spoiler hole 24, thereby avoiding the reduction of the strength of the fin 2 due to the provision of the spoiler hole 24. At the same time, the provision of the spoiler hole 24 also reduces the volume of the fin 2 and reduces the material cost of the fin 2.

[0054] Optionally, the substrate 1 and the fins 2 may both be made of materials with good thermal conductivity and easy to manufacture, such as aluminum plates.

[0055] Optionally, in the second direction, the apertures of the spoiler holes 24 on two adjacent fins 2 are different. Since the apertures of the two adjacent spoiler holes 24 in the second direction are different, the amount of gas flowing laterally is different, thereby increasing the chaos of the gas flow, prolonging the time that the gas stays in the heat exchange channel, and thus prolonging the heat exchange time between the gas and the fin 2, thereby improving the heat exchange efficiency.

[0056] Optionally, in the first direction, the apertures of the turbulence holes 24 on two adjacent fins 2 are different, so the amount of gas that undergoes lateral movement in the first direction is also different, further increasing the disorder of the gas flow, extending the gas residence time in the heat exchange channel, and further extending the heat exchange time between the gas and the fins 2, thereby improving the heat exchange efficiency.

[0057] Optionally, in the first direction, the spoiler holes 24 on two adjacent fins 2 are staggered, so that the positions where the gas laterally moves in the first direction are also different, further increasing the disorder of the gas flow.

[0058] Optionally, the fin 2 includes a first side plate 21, a second side plate 22 and a top plate 23. The first side plate 21 is connected to the base plate 1; the second side plate 22 is connected to the base plate 1 and is arranged opposite to the first side plate 21; the top plate 23 connects the first side plate 21 and the second side plate 22 and is arranged opposite to the base plate 1; wherein the first side plate 21, the second side plate 22, the base plate 1 and the top plate 23 are arranged to form a second heat exchange channel 4, and in the second direction, two adjacent second heat exchange channels 4 are at least partially connected.

[0059] That is, the fins 2 can be U-shaped plates, and each U-shaped plate is directly clamped with the base plate 1 to form a second heat exchange channel 4, thereby improving the installation efficiency of the fins 2. That is, when two fins 2 are installed along the first direction, two second heat exchange channels 4 and one first heat exchange channel 3 are formed between the two U-shaped plates, for a total of three heat exchange channels, while only one first heat exchange channel 2 is formed between the two straight plates.

[0060] As an alternative embodiment, the fin 2 may also be a V-shaped plate, which will not be further described here.

[0061] Optionally, in the second direction, the widths of two adjacent second heat exchange channels 4 are different. That is, the widths of the U-bends of the U-shaped plates are different, so that the flow cross-sections in different U-shaped plates are different, so that the flow velocities of the airflow in different U-shaped plates in the second direction are also different, further improving the airflow chaos and the heat exchange efficiency.

[0062] Optionally, the fin 2 may be welded to the base plate 1 .

[0063] Optionally, the heat exchange layer includes two groups, and the two groups of heat exchange layers are relatively arranged on both sides of the substrate 1 to further increase the heat exchange area. Furthermore, the two groups of heat exchange layers can be symmetrically arranged.

[0064] The scope of use of the heat exchanger provided in the embodiment of the present application is not further limited here. For example, it can be applied in the field of air separation equipment, such as the main heat exchanger, subcooler, condenser evaporator and other low-temperature heat exchangers in the air separation equipment, which can save equipment investment and installation costs and reduce unit energy consumption; or it can be applied in the field of petrochemical industry. In the process of deep cold separation of ethylene, synthetic ammonia nitrogen washing, natural gas, oilfield gas separation and liquefaction, the heat exchanger provided in the embodiment of the present application has the advantages of large processing capacity, good separation effect, low energy consumption, etc.; or it can be applied in the field of engineering machinery. In the equipment such as automobile and locomotive radiators, excavator oil coolers, refrigerator radiators, and high-power transformer radiators, the heat exchanger can be used for heat dissipation and temperature control; or it can be applied in the field of shipbuilding and marine engineering. In the ship cooling system, the heat exchanger is used to cool seawater or fresh water to maintain the engine and other equipment. Normal operating temperature; or applied in the field of automobile manufacturing, in the automobile engine cooling system, the heat exchanger is used to control the temperature of the engine to prevent overheating; or applied in the field of food and beverage industry, in food processing and beverage production, the heat exchanger is used to heat or cool the raw materials, such as cooking, pasteurization, etc.; or applied in the field of medical equipment, in medical equipment such as hemodialysis machines, disinfection equipment, etc., the heat exchanger is used to control the temperature of the medium; or applied in the field of environmental engineering, in waste gas treatment and wastewater treatment equipment, the heat exchanger is used to heat or cool the treatment medium to promote chemical reactions or improve treatment efficiency; or applied in the field of centralized heating and heating systems, heat exchangers are used in the process of heating the waste heat area of ​​thermal power plants, heating bathing water, etc.; or applied in the field of solar energy utilization, in solar thermal utilization systems, heat exchangers are used to absorb and transfer solar thermal energy.

[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The heat exchanger provided in the embodiment of the present application is introduced in detail above. The principle and implementation method of the present application are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application; at the same time, for technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A heat exchanger, characterized in that: include: substrate; A heat exchange layer is arranged on one side of the substrate, the heat exchange layer comprises a plurality of groups of heat exchange units, the plurality of groups of heat exchange units are arranged at intervals along a first direction, a first heat exchange channel is formed between two adjacent groups of heat exchange units, each group of heat exchange units comprises at least two fins, at least two of the fins are spaced apart along a second direction, and in the second direction, at least two of the fins are staggered; The first direction and the second direction are different.

2. The heat exchanger according to claim 1, characterized in that: In the second direction, the lengths of two adjacent fins are different.

3. The heat exchanger according to claim 1, characterized in that: Each of the fins is penetrated by a spoiler hole, and each of the spoiler holes is connected to two adjacent first heat exchange channels.

4. The heat exchanger according to claim 3, characterized in that In the second direction, the spoiler holes on two adjacent fins have different apertures.

5. The heat exchanger according to claim 3, characterized in that: In the first direction, the spoiler holes on two adjacent fins have different apertures.

6. The heat exchanger according to claim 3, characterized in that: In the first direction, the spoiler holes on two adjacent fins are staggered.

7. The heat exchanger according to claim 1, characterized in that Each group of the heat exchange units includes a plurality of fin groups, each of the fin groups includes four fins, and the length ratio of the four fins is 9:8:5:

4.

8. The heat exchanger according to claim 1, characterized in that The fin comprises: A first side plate connected to the base plate; a second side plate connected to the base plate and arranged opposite to the first side plate; A top plate, connecting the first side plate and the second side plate, and arranged opposite to the base plate; The first side plate, the second side plate, the base plate and the top plate are arranged to form a second heat exchange channel, and in the second direction, two adjacent second heat exchange channels are at least partially connected.

9. The heat exchanger according to claim 8, characterized in that In the second direction, widths of two adjacent second heat exchange channels are different.

10. The heat exchanger according to claim 1, characterized in that The heat exchange layer includes two groups, and the two groups of heat exchange layers are arranged oppositely on two sides of the substrate.

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