Heat exchanger
By designing a heat exchanger that includes microchannels for cooling and heat exchange, the problem of hydrogen temperature rise during hydrogenation was solved, achieving effective temperature reduction and efficient heat exchange while avoiding hydrogen embrittlement.
Patent Information
- Application Number
- CN202422443617.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-10-09
AI Technical Summary
During the hydrogenation process, as the hydrogen pressure decreases, the temperature inside the pipeline gradually increases, requiring an effective heat exchanger to cool down the gas and prevent overheating.
A heat exchanger was designed, comprising a core, a cold side plate, and a hot side plate, forming microchannels for cooling medium and microchannels for heat exchange medium. Heat exchange is performed between the cooling medium and hydrogen to reduce the temperature of the hydrogen. Welds are avoided at the inlet and outlet of the hot side to prevent hydrogen embrittlement.
It achieves effective temperature reduction, avoids excessively high hydrogen temperature, and has a compact structure with higher heat exchange efficiency, while avoiding hydrogen embrittlement.
Smart Images
Figure CN223580736U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat exchanger technical field, concretely relates to a heat exchanger. BACKGROUND
[0002] In the process of hydrogenation by hydrogenation machine, with the release of hydrogen pressure, the pressure in the high pressure tank gradually reduces, which will cause the temperature of hydrogen in the pipeline to gradually rise, therefore, it is necessary to set the corresponding heat exchanger to cool the hydrogen in the pipeline. SUMMARY
[0003] Therefore, the utility model provides a heat exchanger based on the characteristics that the temperature of hydrogen rises due to the decrease of pressure.
[0004] In order to solve the above technical problem, the utility model provides a heat exchanger, which comprises a core body, the core body has an upper side plate, a lower side plate and at least one group of heat exchange units stacked between the upper side plate and the lower side plate.
[0005] The heat exchange unit comprises two cold side plates, a partition plate and a hot side plate, a cooling medium microchannel is formed between the two cold side plates, and a heat exchange medium microchannel is formed between the partition plate and the hot side plate.
[0006] The upper side plate has a cold side inlet and a cold side outlet communicating with the cooling medium microchannel, and the lower side plate has a hot side inlet and a hot side outlet communicating with the heat exchange medium microchannel.
[0007] Optionally, it also comprises a cold side joint, which has two, and is respectively connected to the cold side inlet and the cold side outlet.
[0008] Optionally, it also comprises a bracket, which is symmetrically installed on both sides of the core body.
[0009] Optionally, one side of the cold side plate is a flat plate, and the other side has a microchannel structure, and the microchannel structure sides of the two cold side plates are oppositely buckled and matched to form the cooling medium microchannel.
[0010] Optionally, the cold side plate is provided with a cold side distribution cavity communicating with the cooling medium microchannel at both ends, and the cold side distribution cavity is a through hole.
[0011] Optionally, one side of the hot side plate is a flat plate, and the other side has a microchannel structure, and the microchannel structure side of the hot side plate is matched with the partition plate to form the heat exchange medium microchannel.
[0012] Optionally, the hot side plate is provided with a hot side distribution cavity communicating with the heat exchange medium microchannel at both ends, and the hot side distribution cavity is a through hole.
[0013] The utility model discloses technical scheme has following advantages:
[0014] 1. The heat exchanger provided by the utility model cools hydrogen through the cooling medium microchannel and the heat exchange medium microchannel in the core body, so that the hydrogen is cooled by the cooling medium, and the temperature of the hydrogen in the pipeline during hydrogenation is prevented from increasing too much.
[0015] 2. The heat exchanger provided by the utility model directly arranges the hot side inlet and the hot side outlet on the lower side plate, and the core body is connected with the hydrogen, and there is no welding seam at the connecting position, so that the problem of hydrogen embrittlement during the hydrogen entering the core body is avoided.
[0016] 3. The heat exchanger provided by the utility model has simple structure, high compactness and higher heat exchange efficiency. DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.
[0018] Figure 1 It is a perspective view of one specific embodiment of the heat exchanger provided in the embodiment of the utility model;
[0019] Figure 2 It is a bottom view of the first cold side plate in the embodiment; Figure 1
[0020] Figure 3 It is an exploded view of the embodiment; Figure 1
[0021] Figure 4 It is a perspective view of the upper side plate in the embodiment; Figure 3
[0022] It is a bottom view of the first cold side plate in the embodiment; Figure 5 Figure 3 It is a top view of the second cold side plate in the embodiment;
[0023] Figure 6 Figure 3 It is a bottom view of the partition plate in the embodiment;
[0024] Figure 7 It is a top view of the hot side plate in the embodiment. Figure 3
[0025] Figure 8 Figure 3
[0026] Reference numerals:
[0027] 1, core; 2, upper side plate; 3, cold side inlet; 4, cold side outlet; 5, lower side plate; 6, hot side inlet; 7, hot side outlet; 8, cold side joint; 9, heat exchange unit; 10, first cold side plate; 11, second cold side plate; 12, cooling medium microchannel; 13, cold side distribution cavity; 14, hot side plate; 15, partition plate; 16, heat exchange medium microchannel; 17, hot side distribution cavity; 19, support. DETAILED DESCRIPTION
[0028] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0029] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0031] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.
[0032] The heat exchanger provided by the embodiment can be used for heat exchange of two kinds of media, and specifically can be used for cooling hydrogen gas on a hydrogenation channel.
[0033] For example, Figures 1-4As shown, this is a specific embodiment of the heat exchanger provided in this example, including: a core 1, the core 1 having an upper side plate 2, a lower side plate 5, and at least one set of heat exchange units 9 stacked between the upper side plate 2 and the lower side plate 5; the heat exchange unit 9 includes: two cold side plates, a partition 15, and a hot side plate 14, a cooling medium microchannel 12 is formed between the two cold side plates, and a heat exchange medium microchannel 16 is formed between the partition 15 and the hot side plate 14; the upper side plate 2 has a cold side inlet 3 and a cold side outlet 4 communicating with the cooling medium microchannel 12, and the lower side plate 5 has a hot side inlet 6 and a hot side outlet 7 communicating with the heat exchange medium microchannel 16.
[0034] In use, hydrogen enters through the hot-side inlet 6 on the lower side plate 5, passes through the heat exchange medium microchannel 16, and exits the heat exchanger from the hot-side outlet 7; the cooling medium enters through the cold-side inlet 3, passes through the cooling medium microchannel 12, and exits the heat exchanger from the cold-side outlet 4, thereby realizing heat exchange between the cooling medium and hydrogen in the heat exchanger.
[0035] like Figures 1-4 As shown, the heat exchanger provided in this embodiment further includes: a cold-side connector 8 and a bracket 19. There are two cold-side connectors 8, which are respectively connected to the cold-side inlet 3 and the cold-side outlet 4; that is, one cold-side connector 8 is connected to the cold-side inlet 3, and the other cold-side connector 8 is connected to the cold-side outlet 4. With this arrangement, the cooling medium communicates with the core 1 of the heat exchanger through the two cold-side connectors 8. The brackets 19 are symmetrically installed on both sides of the core 1; that is, there are four brackets 19, two of which are symmetrically installed on the two symmetrical sides of the upper side plate 2, and the other two are symmetrically installed on the two symmetrical sides of the lower side plate 5. The brackets 19 facilitate the installation and fixation of the heat exchanger. In some alternative embodiments, the cold-side connectors 8 and the brackets 19 can be omitted.
[0036] The heat exchanger provided in this embodiment exchanges heat between the cooling medium and hydrogen through the cooling medium microchannels 12 and heat exchange medium microchannels 16 within the core 1. This cools the hydrogen and prevents excessive temperature rise in the pipeline during hydrogen refueling. Furthermore, the hot-side inlet 6 and hot-side outlet 7 are directly mounted on the lower side plate 5. After the core 1 is connected to the hydrogen, there is no weld at the connection point, which avoids hydrogen embrittlement during hydrogen entry into the core 1.
[0037] like Figure 5 , Figure 6As shown, the heat exchanger provided by the embodiment comprises two cold side plates, i.e., a first cold side plate 10 and a second cold side plate 11. One side of each of the two cold side plates is a flat plate, and the other side has a micro-channel structure. The two cold side plates are symmetrically arranged, and the sides with the micro-channel structure of the two cold side plates are oppositely and tightly fitted to form the cooling medium micro-channels 12.
[0038] As shown, Figure 5 and Figure 6 In the embodiment, two ends of each of the cold side plates are respectively provided with a cold side distribution cavity 13, which is a through hole. The cold side distribution cavities 13 are in communication with the cooling medium micro-channels 12. After installation, the cooling medium enters the core 1 through the cold side joint 8, enters the cooling medium micro-channels 12 from the cold side distribution cavity 13 at one end, and flows out of the cooling medium micro-channels 12 from the cold side distribution cavity 13 at the other end.
[0039] As shown, Figure 7 , Figure 8 One side of the hot side plate 14 is a flat plate, and the other side has a micro-channel structure. The side with the micro-channel structure of the hot side plate 14 is laminated with the partition plate 15 to form the heat exchange medium micro-channels 16.
[0040] As shown, Figure 7 and Figure 8 In the embodiment, two ends of the hot side plate 14 are respectively provided with a hot side distribution cavity 17, which is a through hole. The hot side distribution cavities 17 are in communication with the heat exchange medium micro-channels 16. After installation, hydrogen enters the core 1 through the hot side inlet 6, enters the heat exchange medium micro-channels 16 from the hot side distribution cavity 17 at one end in the core 1, and flows out of the heat exchange medium micro-channels 16 from the hot side distribution cavity 17 at the other end.
[0041] It should be noted that when a plurality of groups of the heat exchange units 9 are laminated, the plurality of groups of the heat exchange units 9 are in parallel communication. In this way, through holes for the cooling medium to pass through and through holes for hydrogen to pass through are arranged on the hot side plate 14, the cold side plate, and the partition plate 15. Through the above arrangement, the compact structure of the core 1 is achieved, and the heat exchange efficiency is higher.
[0042] Obviously, the above embodiment is only an example for clear illustration, and is not a limitation on the implementation. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementations do not need to be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the utility model.
Claims
1. A heat exchanger, characterized in that, include: Core (1), the core (1) having an upper side plate (2), a lower side plate (5) and at least one set of heat exchange units (9) stacked between the upper side plate (2) and the lower side plate (5); The heat exchange unit (9) includes: two cold side plates, a partition (15) and a hot side plate (14), a cooling medium microchannel (12) is formed between the two cold side plates, and a heat exchange medium microchannel (16) is formed between the partition (15) and the hot side plate (14). The upper side plate (2) has a cold side inlet (3) and a cold side outlet (4) that connect to the cooling medium microchannel (12), and the lower side plate (5) has a hot side inlet (6) and a hot side outlet (7) that connect to the heat exchange medium microchannel (16).
2. The heat exchanger according to claim 1, characterized in that, Also includes: Two cold-side connectors (8) are provided, which are respectively connected to the cold-side inlet (3) and the cold-side outlet (4).
3. The heat exchanger according to claim 1, characterized in that, Also includes: A bracket (19) is symmetrically installed on both sides of the core (1).
4. The heat exchanger according to any one of claims 1-3, characterized in that, One side of the cold side plate is a flat plate, and the other side has a microchannel structure. The two cold side plates are symmetrically arranged, and the sides of the two cold side plates with microchannel structures are engaged to form the cooling medium microchannel (12).
5. The heat exchanger according to claim 4, characterized in that, The cold side plate has cold side distribution cavities (13) at both ends that are connected to the cooling medium microchannel (12), and the cold side distribution cavities (13) are through holes.
6. The heat exchanger according to any one of claims 1-3, characterized in that, One side of the hot side plate (14) is a flat plate, and the other side has a microchannel structure. The side of the hot side plate (14) with the microchannel structure cooperates with the partition plate (15) to form the heat exchange medium microchannel (16).
7. The heat exchanger according to claim 6, characterized in that, The two ends of the heat-side plate (14) are respectively provided with heat-side distribution cavities (17) that communicate with the heat exchange medium microchannel (16), and the heat-side distribution cavity (17) is a through hole.