A heat exchanger and electrochemical energy conversion system

Abstract

This utility model discloses a heat exchanger and an electrochemical energy conversion system. The heat exchanger includes a heat exchange core and heat exchange channels. The heat exchange core includes a first side, a second side, a third side, and a fourth side. The first side has multiple first hot-side openings, the second side has multiple first cold-side openings, and both the third and fourth sides have multiple second hot-side openings and multiple second cold-side openings. The heat exchange channels include multiple hot-side channels and multiple cold-side channels, which are alternately arranged in the heat exchange core along a third direction. The first and second hot-side openings are respectively connected to their corresponding hot-side channels, and the first and second cold-side openings are respectively connected to their corresponding cold-side channels. This utility model can improve the uniformity of the flow distribution of hot and cold fluids and improve the heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a heat exchanger and an electrochemical energy conversion system. Background Technology

[0002] Heat exchangers enable heat transfer between two or more fluids at different temperatures and are widely used in electrochemical energy conversion systems such as fuel cell systems and electrolytic cell systems. Heat exchangers recover excess reaction heat from the electrochemical energy conversion system to heat the raw material medium to the required reaction temperature, thereby maintaining a stable thermal equilibrium and achieving high energy utilization efficiency.

[0003] Heat exchangers typically consist of alternating cold-side and hot-side flow channels, with adjacent cold-side and hot-side channels sharing a common baffle. Heat exchange occurs between the fluids in the cold-side and hot-side channels through this baffle. However, existing heat exchangers suffer from uneven fluid flow distribution between the cold-side and hot-side channels, leading to a reduced heat exchange area, decreased heat exchange efficiency, and consequently, impacting the overall heat transfer performance of the heat exchanger. Utility Model Content

[0004] The present invention aims to solve at least one of the aforementioned technical problems existing in the prior art. Therefore, the purpose of the present invention is to provide a heat exchanger that can improve the uniformity of flow distribution between hot and cold fluids, increase the heat exchange area, and improve heat exchange efficiency.

[0005] This invention also proposes an electrochemical energy conversion system having the above-mentioned heat exchanger.

[0006] A heat exchanger according to a first aspect embodiment of the present invention includes: A heat exchange core includes a first side and a second side arranged opposite to each other along a first direction, and a third side and a fourth side arranged opposite to each other along a second direction. The first side is provided with a plurality of first hot side openings, the second side is provided with a plurality of first cold side openings, and the third side and the fourth side are each provided with a plurality of second hot side openings and a plurality of second cold side openings. The first direction is perpendicular to the second direction. The heat exchange channel includes multiple hot-side channels and multiple cold-side channels. The hot-side channels and the cold-side channels are alternately arranged in the heat exchange core along a third direction. The first hot-side opening and the second hot-side opening are respectively connected to the corresponding hot-side channels. The first cold-side opening and the second cold-side opening are respectively connected to the corresponding cold-side channels. The third direction is respectively perpendicular to the first direction and the second direction.

[0007] The heat exchanger according to the embodiment of this utility model has at least the following beneficial effects: the first hot-side opening is provided on the first side of the heat exchange core, the second hot-side opening is provided on the third and fourth sides of the heat exchange core, the first cold-side opening is provided on the second side of the heat exchange core, and the second cold-side opening is provided on the third and fourth sides of the heat exchange core. The opening direction of the first hot-side opening is perpendicular to the opening direction of the second hot-side opening, and the opening direction of the first cold-side opening is perpendicular to the opening direction of the second cold-side opening. This enables the hot fluid to be more dispersed in the hot-side flow channel and the cold fluid to be more dispersed in the cold-side flow channel, improving the uniformity of the flow distribution of the hot and cold fluids, increasing the heat exchange area, improving the heat exchange efficiency, and thus improving the overall heat transfer performance of the heat exchanger.

[0008] According to some embodiments of the present invention, the flow direction of the hot fluid in the hot-side flow channel is opposite to the flow direction of the cold fluid in the cold-side flow channel; and / or, The second hot-side opening is disposed on the side of the third side and the fourth side that is close to the first cold-side opening, and the second cold-side opening is disposed on the side of the third side and the fourth side that is close to the first hot-side opening.

[0009] According to some embodiments of the present invention, the heat exchanger further includes a first cold-side guide plate, the first cold-side guide plate includes a first cold guide pipe and a first cold guide portion connected to the first cold guide pipe, the first cold guide pipe is arranged in the third direction, and the first cold guide portion covers the first cold-side opening to guide the cold fluid into the cold-side flow channel.

[0010] According to some embodiments of the present invention, the first cold flow guide is provided with an installation groove, and an inclined plate opposite to the second side is provided in the installation groove. Along a third direction away from the first cold flow guide, the distance between the inclined plate and the second side gradually decreases.

[0011] According to some embodiments of the present invention, the cross-sectional area of ​​the second cold side opening gradually decreases along a third direction away from the first cold guide tube.

[0012] According to some embodiments of the present invention, the heat exchanger further includes a wedge-shaped baffle disposed along the third direction. The wedge-shaped baffle is disposed at the second cold side opening of the third side and the second cold side opening of the fourth side. Along the third direction away from the first cold guide pipe, the width of the wedge-shaped baffle gradually increases so that the opening cross-sectional area of ​​the second cold side opening gradually decreases.

[0013] According to some embodiments of the present invention, a second cold-side guide plate is also included. The second cold-side guide plate includes a second cold guide pipe and a second cold guide portion connected to the second cold guide pipe. The second cold guide pipe is arranged along the third direction, and the second cold guide portion covers the second cold-side opening to guide the cold fluid in the cold-side flow channel to the second cold guide pipe.

[0014] According to some embodiments of the present invention, a first hot-side guide plate is also included. The first hot-side guide plate is provided with a guide port, which is connected to the first hot-side opening to guide the hot fluid to the hot-side flow channel.

[0015] According to some embodiments of the present invention, it further includes two second hot-side guide plates, which respectively cover the corresponding second hot-side openings to discharge the hot fluid in the hot-side flow channel.

[0016] According to some embodiments of the present invention, the second hot-side opening of the third side is symmetrically arranged with the second hot-side opening of the fourth side, and the second cold-side opening of the third side is symmetrically arranged with the second cold-side opening of the fourth side.

[0017] An electrochemical energy conversion system according to a second aspect of the present invention includes a heat exchanger according to a first aspect of the present invention.

[0018] The electrochemical energy conversion system according to the embodiments of the present invention has at least the following beneficial effects: the electrochemical energy conversion system of the present application can improve heat exchange efficiency, thereby improving the overall heat transfer performance.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a top view of an embodiment of the present utility model; Figure 3 for Figure 2 Sectional view at CC; Figure 4 for Figure 2 Sectional view at point DD; Figure 5 This is one of the exploded views of an embodiment of the present utility model; Figure 6 for Figure 5 Enlarged view of section A; Figure 7 This is a second exploded view of an embodiment of the present utility model; Figure 8 for Figure 7 Enlarged view of section B; Figure 9 This is a partial structural schematic diagram of an embodiment of the present utility model; Figure 10 for Figure 9 Enlarged view of section C; Figure 11 This is a cross-sectional view of the first cold-side guide plate according to an embodiment of the present invention; Figure 12 This is a front view of the wedge-shaped baffle according to an embodiment of the present invention.

[0021] Reference numerals: 100, heat exchange core; 110, first side surface; 120, second side surface; 130, third side surface; 140, fourth side surface; 150, first hot side opening; 160, first cold side opening; 170, second hot side opening; 180, second cold side opening; 200, heat exchange channel; 210, hot-side channel; 220, cold-side channel; 300. First cold-side guide plate; 310. First cold guide pipe; 320. First cold guide section; 321. Inclined plate; 400. Second cold-side guide plate; 410. Second cold guide pipe; 420. Second cold guide section; 430. Guide connecting plate; 500. First hot-side guide vane; 510. First guide port; 600. Second hot-side guide vane; 610. Second guide port; 700. Wedge-shaped baffle. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0025] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0026] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Reference Figure 1 The first aspect of this utility model provides a heat exchanger, including a heat exchange core 100, a heat exchange channel 200 disposed in the heat exchange core 100, a first cold side guide plate 300, a second cold side guide plate 400, a first hot side guide plate 500, and a second hot side guide plate 600.

[0028] Reference Figure 2 , Figure 5 , Figure 7In some embodiments, the heat exchange core 100 includes a first side surface 110 and a second side surface 120 arranged opposite each other along a first direction, and a third side surface 130 and a fourth side surface 140 arranged opposite each other along a second direction. The first side surface 110 is provided with a plurality of first hot-side openings 150, the second side surface 120 is provided with a plurality of first cold-side openings 160, and the third side surface 130 and the fourth side surface 140 are each provided with a plurality of second hot-side openings 170 and a plurality of second cold-side openings 180. The first direction is perpendicular to the second direction. The heat exchange channel 200 includes a plurality of hot-side channels 210 and a plurality of cold-side channels 220. The hot-side channels 210 and cold-side channels 220 are alternately arranged in the heat exchange core 100 along a third direction. The first hot-side openings 150 and the second hot-side openings 170 are respectively connected to the corresponding hot-side channels 210, and the first cold-side openings 160 and the second cold-side openings 180 are respectively connected to the corresponding cold-side channels 220. The third direction is perpendicular to the first direction and the second direction, respectively.

[0029] It should be noted that the first direction is the Z direction, the second direction is the Y direction, and the third direction is the X direction.

[0030] Reference Figure 2 , Figure 3 , Figure 4 Specifically, the first hot-side opening 150 is located on the first side 110 of the heat exchange core 100, the second hot-side opening 170 is located on the third side 130 and the fourth side 140 of the heat exchange core 100, the first cold-side opening 160 is located on the second side 120 of the heat exchange core 100, and the second cold-side opening 180 is located on the third side 130 and the fourth side 140 of the heat exchange core 100. The opening direction of the first hot-side opening 150 is perpendicular to the opening direction of the second hot-side opening 170, and the opening direction of the first cold-side opening 160 is perpendicular to the opening direction of the second cold-side opening 180. This allows the hot fluid to be more dispersed in the hot-side flow channel 210 and the cold fluid to be more dispersed in the cold-side flow channel 220, improving the uniformity of the flow distribution of the hot and cold fluids, increasing the heat exchange area, improving the heat exchange efficiency, and thus improving the overall heat transfer performance of the heat exchanger.

[0031] Reference Figure 6 , Figure 8 In some embodiments, a plurality of baffles are spaced apart inside the heat exchange core 100, and a heat exchange channel 200 is formed between two adjacent baffles. The hot side channel 210 and the cold side channel 220 are alternately arranged in a third direction, and adjacent hot side channels 210 and cold side channels 220 share a baffle, thereby realizing heat exchange between cold fluid and hot fluid.

[0032] Reference Figure 2 , Figure 3 , Figure 4In some embodiments, the flow direction of the hot fluid in the hot-side flow channel 210 is opposite to the flow direction of the cold fluid in the cold-side flow channel 220; the second hot-side opening 170 is disposed on the side of the third side surface 130 and the fourth side surface 140 near the first cold-side opening 160, and the second cold-side opening 180 is disposed on the side of the third side surface 130 and the fourth side surface 140 near the first hot-side opening 150. Specifically, the first hot-side opening 150 is the inlet of the hot fluid, and the second hot-side opening 170 is the outlet of the hot fluid, so the hot fluid flows from top to bottom along the first direction; at the same time, the first cold-side opening 160 is the inlet of the cold fluid, and the second cold-side opening 180 is the outlet of the cold fluid, so the cold fluid flows from bottom to top along the first direction. Since the second cold side opening 180 is located on the side of the third side 130 and the fourth side 140 that is close to the first hot side opening 150, the second cold side opening 180 is close to the first hot side opening 150, that is, the outlet of the cold fluid is close to the inlet of the hot fluid, so that the cold fluid and the hot fluid form a counter-current heat exchange form, thereby improving the heat exchange efficiency.

[0033] In some embodiments, hot fluid flows in through the first hot-side opening 150 of the first side 110 and exits through the second hot-side openings 170 of the third side 130 and the fourth side 140. Simultaneously, cold fluid flows in through the first cold-side opening 160 of the second side 120 and exits through the second cold-side openings 180 of the third side 130 and the fourth side 140. This creates a "single-inlet, double-outlet" flow path for both fluids within their respective channels. The concentrated pressure field at the single inlet and the dispersive suction effect at the dual outlets reduce the standard deviation of the velocity distribution of the cold and hot fluids within their channels, thereby improving the uniformity of their distribution and reducing localized overheating caused by dead zones. Furthermore, the dual-outlet design makes the residence time distribution of the cold and hot fluids within their channels more consistent, ensuring uniform contact time between the cold and hot fluids and the baffle, and improving the utilization rate of the effective heat exchange area.

[0034] In some embodiments, the second hot-side opening 170 of the third side 130 is symmetrically arranged with the second hot-side opening 170 of the fourth side 140, and the second cold-side opening 180 of the third side 130 is symmetrically arranged with the second cold-side opening 180 of the fourth side 140. This ensures that the flow of hot fluid in the hot-side flow channel 210 is symmetrical and the flow of cold fluid in the cold-side flow channel 220 is symmetrical. This ensures that the flow path length of the cold fluid is the same as that of the hot fluid, thereby ensuring that the heat exchanger has more sufficient and uniform heat exchange.

[0035] In some other embodiments, the first hot-side opening 150 is the outlet of the hot fluid, the second hot-side opening 170 is the inlet of the hot fluid, and the first cold-side opening 160 is the outlet of the cold fluid, and the second cold-side opening 180 is the inlet of the cold fluid. In actual design, the inlet and outlet positions of the hot fluid and the cold fluid can be designed according to actual needs.

[0036] Reference Figure 3 , Figure 5 In some embodiments, the first cold-side guide plate 300 includes a first cold guide pipe 310 and a first cold guide section 320 connected to the first cold guide pipe 310. The first cold guide pipe 310 is arranged in a third direction, and the first cold guide section 320 covers the first cold-side opening 160 to guide the cold fluid into the cold-side flow channel 220. Specifically, the cold fluid flows into the first cold guide section 320 through the first cold guide pipe 310. The first cold guide section 320 guides the cold fluid from the first cold-side opening 160 into the cold-side flow channel 220, transforming the concentrated inflow of cold fluid into a uniformly distributed flow field along the plane of the first cold-side opening 160, thereby improving the uniformity of flow distribution between the cold-side flow channels 220.

[0037] Reference Figure 5 In some embodiments, the first cold flow guide 320 is provided with a mounting groove, and an inclined plate 321 opposite to the second side 120 is provided in the mounting groove. Along a third direction away from the first cold flow guide pipe 310, the distance between the inclined plate 321 and the second side 120 gradually decreases.

[0038] Reference Figure 7 Specifically, the inlet of the first cold guide pipe 310 is perpendicular to the first cold-side opening 160, and the distance between the first cold guide pipe 310 and each cold-side flow channel 220 is not equal. After passing through the first cold guide pipe 310, the cold fluid needs to flow along a third direction and enter different cold-side flow channels 220 sequentially. Due to the initial force of the cold fluid, the cold fluid flow rate in the cold-side flow channels 220 farther from the inlet of the first cold guide pipe 310 is larger, while the cold fluid flow rate in the cold-side flow channels 220 closer to the inlet of the first cold guide pipe 310 is smaller. This results in an uneven distribution of the cold fluid flow rate in each cold-side flow channel 220 in the heat exchange core 100, affecting the heat exchange efficiency. (Refer to...) Figure 5 , Figure 11 Therefore, the inclined plate 321 is inclined to adjust the pressure loss of each cold side flow channel 220. The cold side flow channel 220 near the inlet of the first cold guide pipe 310 has a relatively small pressure loss because the distance between the inclined plate 321 and the second side 120 is larger, while the cold side flow channel 220 far from the inlet of the first cold guide pipe 310 has a larger pressure loss because the distance between the inclined plate 321 and the second side 120 is smaller. This balances the distribution of cold fluid in each cold side flow channel 220, thereby further improving the heat exchange efficiency of the heat exchanger.

[0039] Reference Figure 9 In some embodiments, along a third direction away from the first cold guide pipe 310, the opening cross-sectional area of ​​the second cold side opening 180 gradually decreases. That is, the opening cross-sectional area of ​​the second cold side opening 180 decreases as the shortest distance between the second cold side opening 180 and the first cold guide pipe 310 increases. The further away from the inlet of the first cold guide pipe 310, the smaller the opening cross-sectional area of ​​the second cold side opening 180, which further increases the flow resistance of the cold side flow channel 220 away from the first cold guide pipe 310. The opening cross-sectional area of ​​the second cold side opening 180 and the pressure loss adjustment of the inclined plate 321 form a synergistic effect, making the cold fluid flow rate of each cold side flow channel 220 more uniform, thereby further improving the heat exchange efficiency of the heat exchanger.

[0040] Reference Figure 2 , Figure 10 , Figure 12 In some embodiments, the heat exchanger further includes a wedge-shaped baffle 700 disposed along a third direction. The wedge-shaped baffle 700 is disposed at the second cold side opening 180 of the third side 130 and the second cold side opening 180 of the fourth side 140. Along the third direction away from the first cold guide pipe 310, the width of the wedge-shaped baffle 700 gradually increases so that the opening cross-sectional area of ​​the second cold side opening 180 gradually decreases.

[0041] Specifically, the two wedge-shaped baffles 700 are symmetrically arranged. The multiple second cold-side openings 180 on the third side 130 and the multiple second cold-side openings 180 on the fourth side 140 of the heat exchange core 100 are of the same shape and size. The wedge-shaped baffles 700 are right-angled triangles. One right-angled side of the wedge-shaped baffle 700 is attached to the side of the second cold-side opening 180 that is close to the second hot-side opening 170. The other right-angled side of the wedge-shaped baffle 700 is attached to the side of the third side 130 or the fourth side 140 that is away from the first cold guide pipe 310. Compared with controlling the opening cross-sectional area of ​​the second cold-side opening 180 of each cold-side flow channel 220, the wedge-shaped baffles 700 can more conveniently adjust the pressure loss of the cold-side flow channel 220.

[0042] Reference Figure 2 , Figure 3 , Figure 5In some embodiments, the second cold-side guide plate 400 includes a second cold-guide pipe 410 and a second cold-guide section 420 connected to the second cold-guide pipe 410. The second cold-guide pipe 410 is arranged in a third direction, and the second cold-guide section 420 covers the second cold-side opening 180 to guide the cold fluid in the cold-side flow channel 220 to the second cold-guide pipe 410. Specifically, the second cold-side opening 180 of the third side 130 and the second cold-side opening 180 of the fourth side 140 of the heat exchange core 100 are both covered with the second cold-guide section 420. The second cold-guide section 420 is connected to the second cold-guide pipe 410 through a guide connecting plate 430. Through the two second cold-guide sections 420, the cold fluid discharged from the second cold-side openings 180 of the third side 130 and the fourth side 140 of the heat exchange core 100 can be combined together for easy delivery to the subsequent application end.

[0043] Reference Figure 2 , Figure 4 , Figure 5 In some embodiments, the first hot-side guide plate 500 is provided with a first guide port 510, which communicates with the first hot-side opening 150 to guide the hot fluid to the hot-side flow channel 210. Specifically, the first hot-side guide plate 500 is disposed on the first side surface 110 of the heat exchange core 100, and the opening direction of the first guide port 510 is parallel to the opening direction of the first hot-side opening 150, so as to facilitate the uniform dispersion of the hot fluid into each hot-side flow channel 210.

[0044] Reference Figure 2 , Figure 4 , Figure 5 In some embodiments, two second hot-side guide plates 600 respectively cover the corresponding second hot-side openings 170 to discharge the hot fluid in the hot-side flow channels 210. Specifically, the two second hot-side guide plates 600 respectively cover the second hot-side openings 170 of the third side 130 and the fourth side 140. The second hot-side guide plates 600 are provided with second guide ports 610, and the opening direction of the second guide ports 610 is perpendicular to the opening direction of the second hot-side openings 170, so as to facilitate the convergence of the hot fluid in each hot-side flow channel 210 and facilitate subsequent transportation.

[0045] A second aspect of this utility model provides an electrochemical energy conversion system, including the heat exchanger of the first aspect of this utility model. The electrochemical energy conversion system of this application can improve heat exchange efficiency, thereby improving overall heat transfer performance.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A heat exchanger, characterized in that, include: A heat exchange core includes a first side and a second side arranged opposite to each other along a first direction, and a third side and a fourth side arranged opposite to each other along a second direction. The first side is provided with a plurality of first hot side openings, the second side is provided with a plurality of first cold side openings, and the third side and the fourth side are each provided with a plurality of second hot side openings and a plurality of second cold side openings. The first direction is perpendicular to the second direction. The heat exchange channel includes multiple hot-side channels and multiple cold-side channels. The hot-side channels and the cold-side channels are alternately arranged in the heat exchange core along a third direction. The first hot-side opening and the second hot-side opening are respectively connected to the corresponding hot-side channels. The first cold-side opening and the second cold-side opening are respectively connected to the corresponding cold-side channels. The third direction is respectively perpendicular to the first direction and the second direction.

2. The heat exchanger according to claim 1, characterized in that, The flow direction of the hot fluid in the hot-side channel is opposite to the flow direction of the cold fluid in the cold-side channel; and / or, The second hot-side opening is disposed on the side of the third side and the fourth side that is close to the first cold-side opening, and the second cold-side opening is disposed on the side of the third side and the fourth side that is close to the first hot-side opening.

3. The heat exchanger according to claim 1, characterized in that, The heat exchanger further includes a first cold-side guide plate, which includes a first cold guide pipe and a first cold guide section connected to the first cold guide pipe. The first cold guide pipe is arranged along the third direction, and the first cold guide section covers the first cold-side opening to guide the cold fluid into the cold-side flow channel.

4. The heat exchanger according to claim 3, characterized in that, The first cold flow guide section is provided with an installation groove, and an inclined plate opposite to the second side is provided in the installation groove. Along a third direction away from the first cold flow guide pipe, the distance between the inclined plate and the second side gradually decreases.

5. The heat exchanger according to claim 3, characterized in that, Along a third direction away from the first cold guide tube, the cross-sectional area of ​​the second cold side opening gradually decreases.

6. The heat exchanger according to claim 5, characterized in that, The heat exchanger also includes a wedge-shaped baffle disposed along the third direction. The wedge-shaped baffle is disposed at the second cold side opening of the third side and the second cold side opening of the fourth side. Along the third direction away from the first cold guide pipe, the width of the wedge-shaped baffle gradually increases so that the opening cross-sectional area of ​​the second cold side opening gradually decreases.

7. The heat exchanger according to claim 1, characterized in that, It also includes a second cold-side guide plate, which includes a second cold guide pipe and a second cold guide portion connected to the second cold guide pipe. The second cold guide pipe is arranged along the third direction, and the second cold guide portion covers the second cold-side opening to guide the cold fluid in the cold-side flow channel to the second cold guide pipe.

8. The heat exchanger according to claim 1, characterized in that, It also includes a first hot-side guide plate, which is provided with a guide port that is connected to the first hot-side opening to guide the hot fluid to the hot-side flow channel.

9. The heat exchanger according to claim 1, characterized in that, It also includes two second hot-side guide vanes, which respectively cover the corresponding second hot-side openings to discharge the hot fluid in the hot-side flow channel.

10. An electrochemical energy conversion system, characterized in that, Includes the heat exchanger as described in any one of claims 1 to 9.

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