Large-flow micro-channel type hydrogen heat exchanger and core plate thereof

Abstract

The utility model relates to the technical field of heat exchangers, in particular to a large-flow micro-channel type hydrogen heat exchanger and a core plate thereof. A plurality of vertical flow guide strips are arranged in the hydrogen flow groove and the medium flow groove of the core plate, and the hydrogen flow channel and the medium flow channel are separated by the flow guide strips to form micro-channels; the hydrogen inlet hole and the hydrogen outlet hole are respectively formed in the upper and lower ends of the core plate; the medium inlet hole and the medium outlet hole are respectively formed in the upper and lower ends of the core plate; the hydrogen inlet hole and the hydrogen outlet hole are communicated with the hydrogen flowing groove and are positioned outside the medium flowing groove; the medium inlet hole and the medium outlet hole are communicated with the medium flowing groove and are positioned outside the hydrogen flowing groove; the hydrogen inlet hole is located between the two medium outlet holes, and the hydrogen outlet hole is located between the two medium inlet holes. The core plate has the advantages of being large in flow and small in flow resistance, and the large-flow micro-channel type hydrogen heat exchanger with the core plate is applied to a hydrogenation heat exchanger of a hydrogen refueling station and can improve hydrogenation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a microchannel hydrogen heat exchanger with a large flow rate and its core plate. Background Art

[0002] A microchannel heat exchanger is provided with microchannels in the heat exchanger, which has a high heat transfer efficiency. In the prior art, the microchannel heat exchanger is combined with a plate heat exchanger to enable the heat exchanger to adapt to the heat transfer of high-pressure hydrogen. Hydrogen microchannels and heat transfer medium microchannels are arranged in the plate heat exchanger to achieve a high heat transfer efficiency. However, spiral or tortuous microchannels will greatly increase the resistance of hydrogen flow, and the hydrogen processing capacity is small. When used in a heat exchanger for hydrogen refueling stations to refuel vehicles, the hydrogen refueling speed is affected. Summary of the Utility Model

[0003] The first object of the utility model is to propose a core plate of a microchannel hydrogen heat exchanger with a large flow rate, which has the characteristics of large flow rate and small flow resistance;

[0004] The second object of the utility model is to propose a microchannel hydrogen heat exchanger with a large flow rate, which adopts the above-mentioned core plate and is applied to a hydrogen refueling heat exchanger in a hydrogen refueling station to improve the hydrogen refueling efficiency.

[0005] To achieve the first object of the utility model, the following technical solutions are adopted:

[0006] A core plate of a microchannel hydrogen heat exchanger with a large flow rate, characterized in that a hydrogen flow groove is arranged on one side surface of the core plate, a medium flow groove is arranged on the other side surface, a hydrogen flow channel or a medium flow channel is formed between two adjacent core plates, and a plurality of vertical flow guiding strips are arranged in both the hydrogen flow groove and the medium flow groove, and the hydrogen flow channel and the medium flow channel are separated by the flow guiding strips to form microchannels;

[0007] The core plate is provided with a hydrogen inlet hole, a hydrogen outlet hole, a medium inlet hole and a medium outlet hole. The hydrogen inlet hole and the hydrogen outlet hole are respectively arranged at the upper and lower ends of the core plate, and the medium inlet hole and the medium outlet hole are respectively arranged at the upper and lower ends of the core plate;

[0008] Both the hydrogen inlet hole and the hydrogen outlet hole are communicated with the hydrogen flow groove and are located outside the medium flow groove; both the medium inlet hole and the medium outlet hole are communicated with the medium flow groove and are located outside the hydrogen flow groove;

[0009] The hydrogen inlet hole is located between the two medium outlet holes, and the hydrogen outlet hole is located between the two medium inlet holes.

[0010] Further, the two medium inlet holes and the two medium outlet holes are respectively arranged at the four corners of the core plate, and the hydrogen inlet hole and the hydrogen outlet hole are both located at the center of the end of the core plate.

[0011] Further, the cross-sections of the hydrogen inlet hole and the hydrogen outlet hole are both elliptical and of the same size, and the minor axes of the cross-sections of the hydrogen inlet hole and the hydrogen outlet hole are vertically arranged.

[0012] Further, the medium inlet hole and the medium outlet hole are both circular holes and of the same size.

[0013] Further, both side edges of the hydrogen flow channel and the medium flow channel are vertical edges;

[0014] The end of the vertical edge of the hydrogen flow channel is connected to the side edge of the hydrogen inlet hole or the hydrogen outlet hole through a first inclined edge;

[0015] The end of the vertical edge of the medium flow channel is connected to the side edge of the medium inlet hole or the medium outlet hole through a second inclined edge;

[0016] The two medium inlet holes are connected through a third inclined edge and / or a horizontal straight edge.

[0017] Further, a plurality of parallel flow guiding strips in the hydrogen flow channel form a flow guiding area, and a first flow dividing column area and a first inclined strip flow dividing area are both arranged between the hydrogen inlet hole and the hydrogen outlet hole and the flow guiding area;

[0018] The first flow dividing column area is arranged with flow guiding columns in an array manner, and the first inclined strip flow dividing area has a plurality of inclined strips.

[0019] Further, a plurality of parallel flow guiding strips in the medium flow channel form a flow guiding area, and a second flow dividing column area is arranged between the medium inlet hole and the medium outlet hole and the flow guiding area;

[0020] The second flow dividing column area is arranged with flow guiding columns in an array manner, and the second flow dividing column area has at least one inclined strip.

[0021] Further, a gas collecting groove is arranged on one side of the core plate where the hydrogen flow channel is located, the gas collecting groove is arranged around the edge of the core plate, and the gas collecting groove is provided with a lead-out hole;

[0022] The bottom plate is provided with a gas collecting hole, and the lead-out holes of a plurality of core plates are communicated and then connected to the gas collecting hole.

[0023] To achieve the second object of the present utility model, the present utility model adopts the following technical solutions:

[0024] A large-flow microchannel hydrogen heat exchanger, characterized in that it includes a panel, a bottom plate, and a plurality of core plates located between the panel and the bottom plate, and the core plates are the core plates of the above-mentioned large-flow microchannel hydrogen heat exchanger;

[0025] The panel is provided with a hydrogen total inlet and a medium total outlet. The hydrogen total inlet is communicated with the hydrogen inlet hole, and the medium total outlet is communicated with the medium outlet hole;

[0026] The bottom plate is provided with a hydrogen total outlet and a medium total inlet. The hydrogen total outlet is communicated with the hydrogen outlet hole, and the medium total inlet is communicated with the medium inlet hole;

[0027] The number of the medium total inlet, the medium total outlet, the medium inlet hole, and the medium outlet hole is the same.

[0028] Further, a gas collecting groove is arranged on one side surface of the core plate having a hydrogen flow groove. The gas collecting groove is arranged around the edge of the core plate, and the gas collecting groove is provided with a lead-out hole;

[0029] The bottom plate is provided with a gas collecting hole, and the lead-out holes of a plurality of the core plates are communicated and then communicated with the gas collecting hole.

[0030] The technical solution provided by the present utility model may include the following beneficial effects:

[0031] In the core plate of the present utility model, a plurality of vertical flow guiding strips form microchannels in the hydrogen flow groove and the medium flow groove. Then, the microchannels are vertical channels. At the same time, the hydrogen inlet hole and the hydrogen outlet hole are located at the upper and lower ends of the core plate, and the medium inlet hole and the medium outlet hole are respectively arranged at the upper and lower ends of the core plate. Then, the fluid enters the flow groove from one end of the core plate and then is discharged from the other end of the core plate through the vertical channels, greatly reducing the flow resistance of the fluid (hydrogen and heat exchange medium) in the microchannels, thereby realizing that the heat exchanger processes a large flow of hydrogen. Description of the Drawings

[0032] Figure 1 is a schematic diagram of one side surface of the core plate of an embodiment of the present utility model;

[0033] Figure 2 is a schematic diagram of the other side surface of the core plate;

[0034] Figure 3 is a schematic diagram of the microchannel hydrogen heat exchanger;

[0035] Figure 4 is an exploded schematic diagram of the microchannel hydrogen heat exchanger;

[0036] Among them, core plate 10, hydrogen inlet hole 101, hydrogen outlet hole 102, medium inlet hole 103, medium outlet hole 104, gas collecting groove 105, lead-out hole 106;

[0037] Hydrogen flow cell 20, first shunt column area 201, first inclined strip shunt area 202;

[0038] Medium flow cell 30, second shunt column area 301;

[0039] Flow guiding strip 02, vertical side 03, first inclined side 04, second inclined side 05, third inclined side 06, horizontal straight side 07;

[0040] Panel 40, hydrogen total inlet 401, medium total outlet 402;

[0041] Bottom plate 50, hydrogen total outlet 501, medium total inlet 502, gas collecting hole 503. Specific embodiments

[0042] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where 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 drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 thus should not be construed as a limitation of the present invention. In addition, the features defined with "first", "second" may explicitly or implicitly include one or more of such features, used to distinguish and describe the features, without order or importance.

[0044] In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0045] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0046] Based on the problems of small flow rate and large flow resistance existing in the microchannel heat exchangers for hydrogen in the prior art, the present utility model provides a large-flow microchannel hydrogen heat exchanger and its core plate. The following will be combined with Figures 1 to 4 , to describe the embodiments of the present utility model.

[0047] A core plate of a large-flow microchannel hydrogen heat exchanger. On one side of the core plate 10, there is a hydrogen flow groove 20, and on the other side, there is a medium flow groove 30. Between two adjacent core plates 10, a hydrogen flow channel or a medium flow channel is formed. A number of vertical flow guiding strips 02 are arranged in both the hydrogen flow groove 20 and the medium flow groove 30. The hydrogen flow channel and the medium flow channel are separated by the flow guiding strips 02 to form microchannels;

[0048] The core plate 10 is provided with a hydrogen inlet hole 101, a hydrogen outlet hole 102, a medium inlet hole 103, and a medium outlet hole 104. The hydrogen inlet hole 101 and the hydrogen outlet hole 102 are respectively arranged at the upper and lower ends of the core plate 10, and the medium inlet hole 103 and the medium outlet hole 104 are respectively arranged at the upper and lower ends of the core plate 10;

[0049] Both the hydrogen inlet hole 101 and the hydrogen outlet hole 102 are communicated with the hydrogen flow groove 20 and are located outside the medium flow groove 30; both the medium inlet hole 103 and the medium outlet hole 104 are communicated with the medium flow groove 30 and are located outside the hydrogen flow groove 20;

[0050] The hydrogen inlet hole 101 is located between the two medium outlet holes 104, and the hydrogen outlet hole 102 is located between the two medium inlet holes 103.

[0051] In the core plate 10 of the present utility model, a number of vertical flow guiding strips 02 form microchannels in the hydrogen flow groove 20 and the medium flow groove 30. Then the microchannels are vertical channels. At the same time, the hydrogen inlet hole 101 and the hydrogen outlet hole 102 are located at the upper and lower ends of the core plate 10, and the medium inlet hole 103 and the medium outlet hole 104 are respectively arranged at the upper and lower ends of the core plate 10. Then the fluid enters the flow groove from one end of the core plate 10 and then discharges from the other end of the core plate 10 through the vertical channels, greatly reducing the flow resistance of the fluid (hydrogen and heat exchange medium) in the microchannels, thereby realizing that the heat exchanger can process a large flow rate of hydrogen. In addition, the number of both the medium outlet holes 104 and the medium inlet holes 103 is two, increasing the flow rate of the medium and ensuring the heat exchange treatment of the large flow rate of hydrogen. Moreover, the hydrogen inlet hole 101 is located between the two medium outlet holes 104 and the hydrogen outlet hole 102 is located between the two medium inlet holes 103. On the one hand, compared with the hydrogen inlet hole 101 and the outlet hole located on the side of the core plate 10, hydrogen can be more evenly distributed in the hydrogen flow channel. On the other hand, it is beneficial for the low-temperature heat exchange medium to quickly fill the medium flow channel, achieving a rapid heat exchange effect.

[0052] Specifically, the two medium inlet holes 103 and the two medium outlet holes 104 are respectively arranged at the four corners of the core plate 10, and the hydrogen inlet hole 101 and the hydrogen outlet hole 102 are both located at the center of the end of the core plate 10, further reducing the flow resistance of the fluid and enhancing the heat exchange effect.

[0053] In an embodiment of the present utility model, the cross-sections of the hydrogen inlet hole 101 and the hydrogen outlet hole 102 are both elliptical and of the same size, and the minor axis of the cross-sections of the hydrogen inlet hole 101 and the hydrogen outlet hole 102 is vertically arranged. It can be understood that, under the same area, the ellipse has a larger length compared to the perfect circle. In this technical solution, by making the cross-sections of the hydrogen inlet hole 101 and the hydrogen outlet hole 102 both elliptical, the length of the connection position between the two hydrogen holes and the hydrogen flow channel 20 is greater, which is more conducive to the rapid and uniform distribution of a large flow of hydrogen in the microchannel. Preferably, the ends of the hydrogen inlet hole 101 and the hydrogen outlet hole 102 are connected to the hydrogen flow channel 20, and the length of the connection position between the two hydrogen holes and the hydrogen flow channel 20 is equal to the major axis of the ellipse.

[0054] Preferably, the medium inlet holes 103 and the medium outlet holes 104 are both circular holes and of the same size. Based on the fact that the number of the medium inlet holes 103 and the medium outlet holes 104 is two, setting them as circular can ensure the flow rate of the heat exchange medium and the uniformity of its distribution in the medium flow channel, and the circular holes are convenient for matching with the holes on the panel 40 and the bottom plate 50 of the heat exchanger.

[0055] In an embodiment of the present utility model, both sides of the hydrogen flow channel 20 and the medium flow channel 30 are vertical sides 03; the end of the vertical side 03 of the hydrogen flow channel 20 is connected to the side edge of the hydrogen inlet hole 101 or the hydrogen outlet hole 102 through a first inclined side 04; the end of the vertical side 03 of the medium flow channel 30 is connected to the side edge of the medium inlet hole or the medium outlet hole 104 through a second inclined side; the two medium inlet holes are connected through a third inclined side 06 and / or a horizontal straight side 07. In this technical solution, the edges of the hydrogen flow channel 20 and the medium flow channel 30 are composed of straight sides and inclined sides, enabling the two flow channels to have a larger coverage area on the core plate 10 as much as possible, which can not only improve the utilization rate of the core plate 10, but also further increase the flow rate of hydrogen and the heat exchange medium.

[0056] In an embodiment of the present utility model, further, a plurality of parallel flow guiding strips 02 in the hydrogen flow tank 20 form a flow guiding area, and a first shunt column area 201 and a first inclined strip shunt area 201 are provided between the hydrogen inlet hole 101 and the hydrogen outlet hole 102 and the flow guiding area; the first shunt column area 201 is arranged with flow guiding columns in an array manner, and the first inclined strip shunt area 201 has a plurality of inclined strips. It can be understood that since there are hypotenuses and vertical sides 03 in the hydrogen flow tank 20, and since the flow guiding strips 02 are vertical, a shunt area needs to be provided between the flow guiding strips 02 and the hydrogen inlet hole 101 and the hydrogen outlet hole 102 to make the hydrogen as evenly distributed as possible in the flow guiding area. Therefore, by providing the first shunt column area 201 and the first inclined strip shunt area 201, the hydrogen introduced from the hydrogen inlet hole 101 is dispersed, so that it evenly enters the flow guiding area, and the hydrogen led out from the flow guiding area is turbulently flowed and divided, so that the hydrogen at each position enters the hydrogen outlet hole 102 as evenly as possible, improving the heat exchange effect.

[0057] Similarly, further, a plurality of parallel flow guiding strips 02 in the medium flow tank 30 form a flow guiding area, and a second shunt column area 301 is provided between the medium inlet hole and the medium outlet hole 104 and the flow guiding area; the second shunt column area 301 is arranged with flow guiding columns in an array manner, and the second shunt column area 301 has at least one inclined strip, so that the heat exchange medium is evenly distributed in the flow guiding area and the heat exchange medium at each position enters the medium outlet hole 104 as evenly as possible, improving the heat exchange effect.

[0058] In an embodiment of the present utility model, a gas collecting groove 105 is provided on one side of the core plate 10 having the hydrogen flow tank 20. The gas collecting groove 105 is arranged around the edge of the core plate 10, and the gas collecting groove 105 is provided with a lead-out hole 106; the bottom plate 50 is provided with a gas collecting hole 503, and the lead-out holes 106 of a plurality of core plates 10 are communicated and then communicated with the gas collecting hole 503. When a crack appears at the welding joint of the core plate 10, the hydrogen in the hydrogen flow channel may leak, and the leaked hydrogen can enter the gas collecting channel and be discharged from the lead-out hole 106 for ice cup detection, improving safety.

[0059] Correspondingly, the present utility model further provides a large-flow microchannel hydrogen heat exchanger, which includes a panel 40, a bottom plate 50, and a plurality of core plates 10 located between the panel 40 and the bottom plate 50. The core plate 10 is the core plate 10 of the above-mentioned large-flow microchannel hydrogen heat exchanger; the panel 40 is provided with a hydrogen total inlet 401 and a medium total outlet 402. The hydrogen total inlet 401 is communicated with the hydrogen inlet hole 101, and the medium total outlet 402 is communicated with the medium outlet hole 104; the bottom plate 50 is provided with a hydrogen total outlet 501 and a medium total inlet 502. The hydrogen total outlet 501 is communicated with the hydrogen outlet hole 102, and the medium total inlet 502 is communicated with the medium inlet hole; the number of the medium total inlet 502, the medium total outlet 402, the medium inlet hole, and the medium outlet hole 104 is the same.

[0060] When the cross-sections of the hydrogen inlet hole 101 and the hydrogen outlet hole 102 on the core plate 10 are elliptical, the outer sides of the hydrogen total inlet 401 of the panel 40 and the hydrogen total outlet 501 of the bottom plate 50 are circular and the inner sides are elliptical, so that the inner end of the hydrogen total inlet 401 of the panel 40 can be aligned with the hydrogen inlet hole 101, and the outer circular end is convenient for connecting the inlet pipeline; the inner end of the hydrogen total outlet 501 of the bottom plate 50 can be aligned with the hydrogen outlet hole 102, and the outer circular end is convenient for connecting the outlet pipeline.

[0061] It should be noted that the plurality of core plates 10 are divided into two types of core plates 10 that are radially symmetric, and the two types of core plates 10 are arranged in an alternating manner. Only between adjacent two core plates 10 can a hydrogen flow channel or a medium flow channel be formed. When the heat exchanger of the present utility model is produced, the panel 40, the plurality of core plates 10, and the bottom plate 50 are overlapped together, and then welded into an integral structure by a vacuum diffusion method.

[0062] Preferably, a gas collecting groove 105 is provided on one side of the core plate 10 having the hydrogen flow groove 20. The gas collecting groove 105 is arranged around the edge of the core plate 10, and the gas collecting groove 105 is provided with a lead-out hole 106; the bottom plate 50 is provided with a gas collecting hole 503. After the lead-out holes 106 of the plurality of core plates 10 are communicated, they are communicated with the gas collecting hole 503. A hydrogen sensor is arranged at the gas collecting hole 503 to monitor whether there is hydrogen leakage in real time, thereby improving safety.

[0063] For other components and operations of a large-flow microchannel hydrogen heat exchanger and its core plate according to an embodiment of the present utility model, they are known to those of ordinary skill in the art and will not be described in detail here.

[0064] In the description of this specification, the descriptions referring to the terms "embodiment", "example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A core plate of a microchannel hydrogen heat exchanger with a large flow rate, characterized in that, One side of the core plate is provided with a hydrogen flow channel, and the other side is provided with a medium flow channel. A hydrogen flow passage or a medium flow passage is formed between two adjacent core plates. A number of vertical flow guiding strips are arranged in both the hydrogen flow channel and the medium flow channel. The hydrogen flow passage and the medium flow passage are separated by the flow guiding strips to form microchannels; The core plate is provided with a hydrogen inlet hole, a hydrogen outlet hole, a medium inlet hole and a medium outlet hole. The hydrogen inlet hole and the hydrogen outlet hole are respectively arranged at the upper and lower ends of the core plate. The medium inlet hole and the medium outlet hole are respectively arranged at the upper and lower ends of the core plate; Both the hydrogen inlet hole and the hydrogen outlet hole are communicated with the hydrogen flow channel and are located outside the medium flow channel; both the medium inlet hole and the medium outlet hole are communicated with the medium flow channel and are located outside the hydrogen flow channel; The hydrogen inlet hole is located between the two medium outlet holes, and the hydrogen outlet hole is located between the two medium inlet holes.

2. The core plate of the microchannel hydrogen heat exchanger with large flow rate according to claim 1, characterized in that, The two medium inlet holes and the two medium outlet holes are respectively arranged at the four corners of the core plate, and the hydrogen inlet hole and the hydrogen outlet hole are both located at the center of the end of the core plate.

3. The core plate of the microchannel hydrogen heat exchanger with large flow rate according to claim 1 or 2, characterized in that The cross sections of both the hydrogen inlet hole and the hydrogen outlet hole are elliptical and of the same size. The short axis of the cross section of the hydrogen inlet hole and the hydrogen outlet hole is arranged vertically.

4. The core plate of the microchannel hydrogen heat exchanger with a large flow rate according to claim 3, characterized in that, Both the medium inlet hole and the medium outlet hole are circular holes and of the same size.

5. The core plate of the microchannel hydrogen heat exchanger with a large flow rate according to claim 4, characterized in that, Both side edges of the hydrogen flow channel and the medium flow channel are vertical edges; The end of the vertical edge of the hydrogen flow channel is connected to the side edge of the hydrogen inlet hole or the hydrogen outlet hole through a first bevel edge; The end of the vertical edge of the medium flow channel is connected to the side edge of the medium inlet hole or the medium outlet hole through a second bevel edge; The two medium inlet holes are connected through a third bevel edge and / or a horizontal straight edge.

6. The core plate of the microchannel hydrogen heat exchanger with large flow rate according to claim 5, characterized in that, A number of parallel arranged flow guiding strips in the hydrogen flow channel form a flow guiding area. A first flow dividing column area and a first inclined strip flow dividing area are arranged between both the hydrogen inlet hole and the hydrogen outlet hole and the flow guiding area; The first flow dividing column area is arranged with flow guiding columns in an array manner, and the first inclined strip flow dividing area has a number of inclined strips.

7. The core plate of the microchannel hydrogen heat exchanger with large flow rate according to claim 5, characterized in that, A number of parallel arranged flow guiding strips in the medium flow channel form a flow guiding area. A second flow dividing column area is arranged between both the medium inlet hole and the medium outlet hole and the flow guiding area; The second flow dividing column area is arranged with flow guiding columns in an array manner, and the second flow dividing column area has at least one inclined strip.

8. The core plate of the microchannel hydrogen heat exchanger with a large flow rate according to claim 5, characterized in that, A gas collecting groove is arranged on one side of the core plate with the hydrogen flow channel. The gas collecting groove is arranged around the edge of the core plate, and the gas collecting groove is provided with a lead-out hole; The bottom plate is provided with a gas collecting hole. The lead-out holes of a number of the core plates are communicated and then connected to the gas collecting hole.

9. A microchannel hydrogen heat exchanger with a large flow rate, characterized in that It includes a panel, a bottom plate and a number of core plates located between the panel and the bottom plate. The core plate is the core plate of the large-flow microchannel hydrogen heat exchanger according to any one of claims 1-7; The panel is provided with a hydrogen total inlet and a medium total outlet. The hydrogen total inlet is communicated with the hydrogen inlet hole, and the medium total outlet is communicated with the medium outlet hole; The bottom plate is provided with a total hydrogen outlet and a total medium inlet. The total hydrogen outlet is communicated with the hydrogen outlet hole, and the total medium inlet is communicated with the medium inlet hole; The number of the total medium inlets, the total medium outlets, the medium inlet holes and the medium outlet holes is the same.

10. The microchannel hydrogen heat exchanger with a large flow rate according to claim 9, characterized in that, A gas collecting groove is arranged on one side of the core plate having the hydrogen flow groove. The gas collecting groove is arranged around the edge of the core plate, and the gas collecting groove is provided with a lead-out hole; The bottom plate is provided with a gas collecting hole, and the lead-out holes of a plurality of the core plates are communicated and then communicated with the gas collecting hole.

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