Plate heat exchanger for hydrogen unloading of hydrogen refueling station
By setting up multiple hydrogen and medium heat exchange channels in parallel in the plate heat exchanger, the problems of insufficient cooling capacity and large fluid resistance in the prior art are solved, and the optimization of efficient hydrogen cooling and system operation is achieved.
Patent Information
- Application Number
- CN202421930638.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-10
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-10
AI Technical Summary
The existing plate heat exchangers have limited cooling capacity and the microchannel heat exchangers have high fluid resistance, which is not conducive to the efficient operation of the hydrogen unloading system of the hydrogen refueling station.
A plate heat exchanger for hydrogen unloading of hydrogen at hydrogen refueling stations is designed. By setting up multiple hydrogen heat exchange channels in the heat exchange plate group in parallel and medium heat exchange channels in parallel, the hydrogen flow path is increased, and multiple cooling methods are adopted, the hydrogen flow resistance is small and the cooling effect is good.
It achieves efficient hydrogen cooling effect, reduces hydrogen flow resistance, is conducive to the efficient operation of hydrogen boosting system and cooling system, and is suitable for hydrogen liquefaction treatment.
Smart Images
Figure CN223091101U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat exchangers, in particular to a plate heat exchanger for hydrogen unloading in a hydrogen filling station. Background Art
[0002] Hydrogen unloading in a hydrogen filling station means that hydrogen is transported by a tube trailer to the hydrogen filling station and then unloaded into the hydrogen storage container in the hydrogen filling station. The hydrogen pressure in the tube trailer is generally 20 MPa, and it needs to be pressurized to 45 MPa, 70 MPa or 90 MPa for storage. A large amount of heat is generated during the pressurization process, and the hydrogen temperature rises. Therefore, it is necessary to cool down the hydrogen.
[0003] The plate heat exchanger has good pressure-bearing performance. After hydrogen enters the plate heat exchanger, it flows through two adjacent core plates and then is output outside the heat exchanger. The flow path of hydrogen is short, so the cooling capacity is limited. The microchannel heat exchanger increases the flow path of hydrogen in the plate heat exchanger in the way of spiral channels or tortuous channels, but increases the flow resistance of hydrogen, which is not conducive to the efficient operation of the pressurization system. Content of the Utility Model
[0004] The purpose of the utility model is to provide a plate heat exchanger for hydrogen unloading in a hydrogen filling station, which increases the flow path of hydrogen, has a small flow resistance of hydrogen, and has a good hydrogen cooling effect.
[0005] To achieve the above object, the utility model adopts the following technical solutions:
[0006] A plate heat exchanger for hydrogen unloading in a hydrogen filling station includes a front panel and a bottom plate. At least one group of heat exchange plate groups is arranged between the front panel and the bottom plate. Each group of heat exchange plate groups includes multiple core plates with medium heat exchange grooves or hydrogen heat exchange grooves. A medium heat exchange channel or a hydrogen heat exchange channel is formed between two adjacent core plates. One medium heat exchange channel is adjacent to one hydrogen heat exchange channel;
[0007] One heat exchange plate group has a plurality of the medium heat exchange channels and a plurality of the hydrogen heat exchange channels. The plurality of medium heat exchange channels are connected in parallel, and the plurality of hydrogen heat exchange channels are connected in series;
[0008] The heat exchange plate group is provided with an air inlet channel, an air outlet channel, a medium inlet channel and a medium outlet channel. The front panel is provided with a hydrogen total inlet and a medium total inlet. The bottom plate is provided with a hydrogen total outlet and a medium total outlet. The hydrogen total inlet, the air inlet channel, the air outlet channel and the hydrogen total outlet are connected in communication. The medium total inlet, the medium inlet channel, the medium outlet channel and the medium total outlet are connected in communication.
[0009] Further, multiple groups of the heat exchange plate groups are arranged side by side, and the air inlet channels and the air outlet channels of the multiple groups of heat exchange plate groups are respectively connected in communication;
[0010] The medium inlet channels and the medium outlet channels of multiple groups of the heat exchange plate groups are respectively communicated with each other.
[0011] Furthermore, the heat exchange plate group includes a first core plate, a second core plate, a third core plate, a fourth core plate, a fifth core plate, and a sixth core plate arranged in sequence;
[0012] The first core plate, the second core plate, the third core plate, the fourth core plate, the fifth core plate, and the sixth core plate are all provided with an intake channel hole, an outlet channel hole, a medium inlet through hole, and a medium outlet through hole;
[0013] The hydrogen heat exchange grooves of the first core plate and the second core plate are communicated with the intake channel hole;
[0014] The second core plate and the third core plate are both provided with first hydrogen flow-through holes corresponding in position, the fourth core plate and the fifth core plate are both provided with second hydrogen flow-through holes corresponding in position, and the first hydrogen flow-through holes and the second hydrogen flow-through holes are located in the hydrogen heat exchange grooves and outside the medium heat exchange grooves;
[0015] The hydrogen heat exchange grooves of the fifth core plate and the sixth core plate are communicated with the outlet channel hole.
[0016] Furthermore, one side of the first core plate close to the panel has a medium heat exchange groove, and one side of the fifth core plate close to the bottom plate has a medium heat exchange groove.
[0017] Furthermore, the intake channel hole is located at the upper part of the core plate of the heat exchange plate group, and the outlet channel hole is located at the lower part of the core plate of the heat exchange plate group;
[0018] The first hydrogen flow-through hole is located at the lower part of the second core plate or the third core plate, and the second hydrogen flow-through hole is located at the upper part of the fourth core plate or the fifth core plate.
[0019] Furthermore, both the first hydrogen flow-through hole and the second hydrogen flow-through hole are elongated holes.
[0020] Furthermore, the intake channel hole, the outlet channel hole, the medium inlet through hole, and the medium outlet hole are respectively arranged at the four corners of the core plate, and the medium inlet through hole and the medium outlet through hole are diagonally arranged on the core plate;
[0021] The medium inlet through hole and the medium outlet through hole are communicated with the medium heat exchange channel and are located outside the hydrogen heat exchange channel.
[0022] Furthermore, both the hydrogen heat exchange channel and the medium heat exchange channel are in the shape of thin sheets and the edges are close to the edges of the core plate, and flow guide strips are arranged in both the hydrogen heat exchange channel and the medium heat exchange channel.
[0023] Furthermore, both ends of the flow guide bars in the medium heat exchange channels are respectively close to the medium inlet through holes and the medium outlet through holes;
[0024] Both ends of the flow guide bars in the hydrogen heat exchange channels are respectively close to the air inlet channel holes and the air outlet channel holes.
[0025] Furthermore, on one side of several core plates of the heat exchange plate group where there are hydrogen heat exchange grooves, air release and gas collection channels are provided. The air release and gas collection channels are arranged around the edges of the core plates, and the air release and gas collection channels are provided with outlet holes;
[0026] The bottom plate is provided with air collection holes, and the outlet holes of several core plates are communicated and then connected to the air collection holes.
[0027] The technical solution provided by the present utility model may include the following beneficial effects:
[0028] Hydrogen sequentially passes through multiple hydrogen heat exchange channels in the heat exchange plate group. After being cooled multiple times, it is discharged from the hydrogen outlet of the heat exchange plate group and the total hydrogen outlet of the bottom plate. At the same time, based on the parallel connection of several medium heat exchange channels of the heat exchange plate group, the low-temperature medium can cool the hydrogen in each hydrogen heat exchange channel, thereby obtaining low-temperature hydrogen, which has a very good cooling effect. Moreover, by adopting the way of connecting multiple hydrogen heat exchange channels in series to increase the flow path of hydrogen, not only can a very good cooling effect be achieved, but also the increase in the flow resistance of hydrogen is small and the flow resistance of the medium remains unchanged. Compared with the micro-channel heat exchanger, the hydrogen flow resistance of the plate heat exchanger of the present utility model is small, which is beneficial to the efficient operation of the hydrogen pressurization system and the cooling system. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 is a schematic diagram of the hydrogen flow line of the plate heat exchanger of the present utility model;
[0030] Figure 2 is a schematic diagram of the medium flow line of the plate heat exchanger of the present utility model;
[0031] Figure 3 is a schematic structural diagram of the plate heat exchanger of the present utility model;
[0032] Figure 4 is a schematic diagram of the medium heat exchange channel and the hydrogen heat exchange channel;
[0033] Figure 5 is a schematic structural diagram of the first core plate, Figure 5 a is a schematic diagram of one side of the first core plate facing the panel, Figure 5 b is a schematic diagram of one side of the first core plate facing the bottom plate;
[0034] Figure 6 is a schematic structural diagram of the second core plate, Figure 6a is a schematic view of the side of the second core plate facing the panel, Figure 6 b is a schematic view of the side of the second core plate facing the bottom plate;
[0035] Figure 7 is a schematic structural view of the third core plate, Figure 7 a is a schematic view of the side of the third core plate facing the panel, Figure 7 b is a schematic view of the side of the third core plate facing the bottom plate;
[0036] Figure 8 is a schematic structural view of the fourth core plate, Figure 8 a is a schematic view of the side of the fourth core plate facing the panel, Figure 8 b is a schematic view of the side of the fourth core plate facing the bottom plate;
[0037] Figure 9 is a schematic structural view of the fifth core plate, Figure 9 a is a schematic view of the side of the fifth core plate facing the panel, Figure 9 b is a schematic view of the side of the fifth core plate facing the bottom plate;
[0038] Figure 10 is a schematic structural view of the sixth core plate, Figure 10 a is a schematic view of the side of the sixth core plate facing the panel, Figure 10 b is a schematic view of the side of the sixth core plate facing the bottom plate;
[0039] Among them, the panel 10, the total hydrogen inlet 101, the total medium inlet 102;
[0040] the bottom plate 20, the total hydrogen outlet 201, the total medium outlet 202;
[0041] the heat exchange plate group 30, the medium heat exchange channel 301, the hydrogen heat exchange channel 302;
[0042] the first core plate 1, the second core plate 2, the third core plate 3, the fourth core plate 4, the fifth core plate 5, the medium heat exchange tank 6, the hydrogen heat exchange tank 7;
[0043] the intake channel hole 01, the outlet channel hole 02, the medium inlet through hole 03, the medium discharge through hole 04, the first hydrogen flow-through hole 05, the second hydrogen flow-through hole 06, the guide strip 07, the air release and gas collection channel 08, the outlet hole 09. Specific embodiments
[0044] The following describes in detail the embodiments of the present invention. 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 from beginning to end. 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.
[0045] In the description of the present utility model, 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. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe features without order or importance.
[0046] In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.
[0047] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0048] Based on the problems of limited cooling capacity of plate heat exchangers and large fluid resistance of microchannel heat exchangers in the prior art, the present utility model provides a plate heat exchanger for hydrogen unloading in a hydrogen refueling station. The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 10 , to describe the embodiments of the present utility model.
[0049] A plate heat exchanger for hydrogen unloading in a hydrogen refueling station includes a panel 10 and a bottom plate 20. At least one set of heat exchange plate groups 30 is provided between the panel 10 and the bottom plate 20. Each set of heat exchange plate groups 30 includes multiple core plates having medium heat exchange grooves 6 or hydrogen heat exchange grooves 7. A medium heat exchange channel 301 or a hydrogen heat exchange channel 302 is formed between two adjacent core plates, and a medium heat exchange channel 301 is adjacent to a hydrogen heat exchange channel 302.
[0050] One heat exchange plate group 30 has a plurality of medium heat exchange channels 301 and a plurality of hydrogen heat exchange channels 302. The plurality of medium heat exchange channels 301 are connected in parallel, and the plurality of hydrogen heat exchange channels 302 are connected in series.
[0051] The heat exchange plate group is provided with an intake passage, an outlet passage, a medium inlet passage and a medium discharge passage. The panel 10 is provided with a hydrogen total inlet 101 and a medium total inlet 102, and the bottom plate 20 is provided with a hydrogen total outlet 201 and a medium total outlet 202. The hydrogen total inlet, the intake passage, the outlet passage and the hydrogen total outlet are connected in communication, and the medium total inlet, the medium inlet passage, the medium discharge passage and the medium total outlet are connected in communication.
[0052] When the plate heat exchanger of the present utility model is in use, hydrogen enters the heat exchange plate group 30 through the hydrogen total inlet 101 of the panel 10 and the hydrogen inlet of the heat exchange plate, and then successively passes through a plurality of hydrogen heat exchange channels 302 in the heat exchange plate group 30. After being cooled multiple times, it is discharged from the hydrogen outlet of the heat exchange plate group 30 and the hydrogen total outlet 201 of the bottom plate 20. At the same time, based on the parallel connection of a number of medium heat exchange channels 301 of the heat exchange plate group 30, the low-temperature medium can cool the hydrogen in each hydrogen heat exchange channel 302, thereby obtaining low-temperature hydrogen, which has a good cooling effect. Moreover, by adopting the method of connecting a plurality of hydrogen heat exchange channels 302 in series to increase the flow path of hydrogen, not only can a good cooling effect be achieved, but the increase in the flow resistance of hydrogen is small and the flow resistance of the medium remains unchanged. Compared with the micro-channel heat exchanger, the plate heat exchanger of the present utility model has a small hydrogen flow resistance, which is beneficial to the efficient operation of the hydrogen pressurization system and the cooling system.
[0053] It should be noted that by setting the number of hydrogen heat exchange channels 302 in each heat exchange plate group 30, the cooling amount of hydrogen can be adjusted to achieve a cryogenic effect. Therefore, the plate heat exchanger of the present utility model can also be applied to hydrogen liquefaction.
[0054] When the plate heat exchanger of the present utility model is produced, the panel 10, a number of core plates and the bottom plate 20 are overlapped together, and then welded into an integral structure by vacuum diffusion.
[0055] In an embodiment of the present utility model, multiple groups of the heat exchange plate groups 30 are arranged side by side, and the intake passages and the outlet passages of the multiple groups of the heat exchange plate groups 30 are respectively connected in communication; the medium inlet passages and the medium discharge passages of the multiple groups of the heat exchange plate groups 30 are respectively connected in communication.
[0056] It can be understood that by connecting multiple groups of heat exchange plate groups 30 in series, the cooling treatment of a large amount of hydrogen can be realized, the hydrogen unloading time of the tube trailer at the hydrogen filling station can be shortened, and the hydrogen unloading efficiency can be improved. Figure 1 and Figure 2 In, the number of the heat exchange plate groups 30 is 2 groups.
[0057] In this technical solution, by providing an intake channel in the heat exchange plate group 30 connected to the total hydrogen inlet 101 and communicating with the total hydrogen inlet 101, the connection between multiple side-by-side arranged heat exchange plate groups 30 and the total hydrogen inlet 101 and the total hydrogen outlet 201 can be achieved without external pipelines, realizing an integrated structure of the plate heat exchanger and ensuring the pressure resistance effect of the plate heat exchanger. It should be noted that, for the convenience of assembling the plate heat exchanger, in a specific embodiment of the present utility model, all the heat exchange plate groups 30 are provided with intake channels and outlet channels.
[0058] Referring to Figures 5 - 10 , in an embodiment of the present utility model, the heat exchange plate group 30 includes a first core plate 1, a second core plate 2, a third core plate 3, a fourth core plate 4, a fifth core plate 5, and a sixth core plate arranged in sequence;
[0059] The first core plate 1, the second core plate 2, the third core plate 3, the fourth core plate 4, the fifth core plate 5, and the sixth core plate are all provided with an intake channel hole 01, an outlet channel hole 02, a medium inlet through hole 03, and a medium discharge through hole 04;
[0060] The hydrogen heat exchange tank 7 of the first core plate 1 and the second core plate 2 is communicated with the intake channel hole 01;
[0061] Both the second core plate 2 and the third core plate 3 are provided with first hydrogen flow-through holes 05 corresponding in position, and both the fourth core plate 4 and the fifth core plate 5 are provided with second hydrogen flow-through holes 06 corresponding in position. The first hydrogen flow-through holes 05 and the second hydrogen flow-through holes 06 are located in the hydrogen heat exchange tank 7 and outside the medium heat exchange tank 6;
[0062] The hydrogen heat exchange tank 7 of the fifth core plate 5 and the sixth core plate is communicated with the outlet channel hole 02.
[0063] It should be noted that the setting of multiple core plates in each heat exchange plate group 30 is beneficial to adjusting the positions of the first hydrogen flow-through holes 05 and the second hydrogen flow-through holes 06, making the hydrogen flow path circuitous, improving the uniformity of hydrogen cooling and the cooling time, and further enhancing the cooling effect.
[0064] In an embodiment of the present utility model, one side of the first core plate 1 close to the panel 10 has a medium heat exchange tank 6, and one side of the fifth core plate 5 close to the bottom plate 20 has a medium heat exchange tank 6. Thus, there is a medium flow space between the panel 10 and the heat exchange plate group 30, and between the bottom plate 20 and the heat exchange plate group 30. The panel 10 and the bottom plate 20 are not only used for support and fixation, but also used to form a medium flow space with the heat exchange plate group 30. Furthermore, it can ensure that the hydrogen heat exchange channel 302 is located between two medium heat exchange channels 301 and can also reduce the thickness of the plate heat exchanger.
[0065] In one embodiment of the present utility model, the intake channel hole 01 is located at the upper part of the core plate of the heat exchange plate group 30, and the outlet channel hole 02 is located at the lower part of the core plate of the heat exchange plate group 30; the first hydrogen flow-through hole 05 is located at the lower part of the second core plate 2 or the third core plate 3, and the second hydrogen flow-through hole 06 is located at the upper part of the fourth core plate 4 or the fifth core plate 5. Refer to Figure 1 , by setting the positions of the two flow-through holes, the series connection of the hydrogen heat exchange channel 302 and the circuitous flow of hydrogen are realized.
[0066] Preferably, both the first hydrogen flow-through hole 05 and the second hydrogen flow-through hole 06 are long strip-shaped holes, which are convenient for arranging the positions of the flow-through holes, and enable the flow-through holes to have a larger cross-sectional area, reducing the resistance of hydrogen flow.
[0067] Preferably, the intake channel hole 01, the outlet channel hole 02, the medium inlet through hole 03 and the medium outlet through hole 04 are respectively arranged at the four corners of the core plate, and the medium inlet through hole 03 and the medium outlet through hole 04 are diagonally arranged on the core plate; the medium inlet through hole 03 and the medium outlet through hole 04 are connected to the medium heat exchange channel 301 and are located outside the hydrogen heat exchange channel 302, so that the positions of the holes and heat exchange grooves on the core plate are reasonably arranged, and the medium channel and the hydrogen channel do not interfere with each other.
[0068] In one embodiment of the present utility model, both the hydrogen heat exchange channel 302 and the medium heat exchange channel 301 are in the shape of thin sheets and the edges are close to the edges of the core plate. Flow guide strips 07 are arranged in both the hydrogen heat exchange channel 302 and the medium heat exchange channel 301. The flow guide strips 07 enable the medium to cover the entire medium heat exchange channel 301 and enable hydrogen to cover the entire hydrogen heat exchange channel 302, improving the heat exchange efficiency. The flow guide strips 07 are integrally formed with the core plate by casting.
[0069] Preferably, both ends of the flow guide strip 07 in the medium heat exchange channel 301 are respectively close to the medium inlet through hole 03 and the medium outlet through hole 04; both ends of the flow guide strip 07 in the hydrogen heat exchange channel 302 are respectively close to the intake channel hole 01 and the outlet channel hole 02.
[0070] In one embodiment of the present utility model, a gas leakage collection channel 08 is arranged on one side of several core plates of the heat exchange plate group 30 with hydrogen heat exchange grooves 7. The gas leakage collection channel 08 is arranged around the edge of the core plate, and the gas leakage collection channel 08 is provided with a lead-out hole 09; the bottom plate 20 is provided with a gas collection hole, and the lead-out holes 09 of several core plates are connected and then connected to the gas collection hole.
[0071] When cracks appear at the welded joints of the core plates, the hydrogen in the hydrogen heat exchange channel 302 may leak, and the leaked hydrogen can enter the gas leakage collection channel 08 and be discharged from the lead-out hole 09 and the gas collection hole. A hydrogen sensor is arranged at the gas collection hole to monitor whether there is hydrogen leakage in real time, improving safety.
[0072] Other components and operations of a plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to an embodiment of the present utility model are known to those of ordinary skill in the art and will not be described in detail here.
[0073] In the description of this specification, the description with reference to terms such as "embodiment", "example", etc. means 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0074] 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 purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.
Claims
1. A plate heat exchanger for hydrogen unloading in a hydrogen refueling station, characterized in that It includes a panel and a bottom plate, and at least one set of heat exchange plate groups is arranged between the panel and the bottom plate. Each set of heat exchange plate groups includes multiple core plates with medium heat exchange grooves or hydrogen heat exchange grooves. A medium heat exchange channel or a hydrogen heat exchange channel is formed between adjacent two core plates, and one medium heat exchange channel is adjacent to one hydrogen heat exchange channel; One set of the heat exchange plate groups has several medium heat exchange channels and several hydrogen heat exchange channels. The several medium heat exchange channels are in parallel connection, and the several hydrogen heat exchange channels are in series connection; The heat exchange plate group is provided with an air inlet channel, an air outlet channel, a medium inlet channel and a medium outlet channel. The panel is provided with a hydrogen total inlet and a medium total inlet, and the bottom plate is provided with a hydrogen total outlet and a medium total outlet. The hydrogen total inlet, the air inlet channel, the air outlet channel and the hydrogen total outlet are connected in communication, and the medium total inlet, the medium inlet channel, the medium outlet channel and the medium total outlet are connected in communication.
2. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 1, wherein, Multiple sets of the heat exchange plate groups are arranged side by side, and the air inlet channels and the air outlet channels of the multiple sets of heat exchange plate groups are respectively connected in communication; The medium inlet channels and the medium outlet channels of the multiple sets of heat exchange plate groups are respectively connected in communication.
3. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 2, wherein, The heat exchange plate group includes a first core plate, a second core plate, a third core plate, a fourth core plate, a fifth core plate and a sixth core plate arranged in sequence; The first core plate, the second core plate, the third core plate, the fourth core plate, the fifth core plate and the sixth core plate are all provided with an air inlet channel hole, an air outlet channel hole, a medium inlet through hole and a medium outlet through hole; The hydrogen heat exchange grooves of the first core plate and the second core plate are connected in communication with the air inlet channel hole; The second core plate and the third core plate are both provided with first hydrogen flow-through holes corresponding in position, and the fourth core plate and the fifth core plate are both provided with second hydrogen flow-through holes corresponding in position. The first hydrogen flow-through holes and the second hydrogen flow-through holes are located in the hydrogen heat exchange grooves and outside the medium heat exchange grooves; The hydrogen heat exchange grooves of the fifth core plate and the sixth core plate are connected in communication with the air outlet channel hole.
4. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 3, characterized in that, One side of the first core plate close to the panel has the medium heat exchange groove, and one side of the fifth core plate close to the bottom plate has the medium heat exchange groove.
5. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 3, characterized in that, The air inlet channel hole is located at the upper part of the core plate of the heat exchange plate group, and the air outlet channel hole is located at the lower part of the core plate of the heat exchange plate group; The first hydrogen flow-through hole is located at the lower part of the second core plate or the third core plate, and the second hydrogen flow-through hole is located at the upper part of the fourth core plate or the fifth core plate.
6. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 5, characterized in that, Both the first hydrogen flow-through hole and the second hydrogen flow-through hole are long strip-shaped holes.
7. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 6, characterized in that, The air inlet channel hole, the air outlet channel hole, the medium inlet through hole and the medium outlet hole are respectively arranged at the four corners of the core plate, and the medium inlet through hole and the medium outlet through hole are diagonally arranged on the core plate; The medium inlet through hole and the medium outlet through hole are connected in communication with the medium heat exchange channel and are located outside the hydrogen heat exchange channel.
8. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 7, characterized in that, Both the hydrogen heat exchange channel and the medium heat exchange channel are in a thin sheet shape and the edges are close to the edges of the core plate, and flow guide strips are arranged in both the hydrogen heat exchange channel and the medium heat exchange channel.
9. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 8, characterized in that, Both ends of the flow guiding strip in the medium heat exchange channel are respectively close to the medium inlet through hole and the medium outlet through hole; Both ends of the flow guiding strip in the hydrogen heat exchange channel are respectively close to the air inlet channel hole and the air outlet channel hole.
10. The plate heat exchanger for hydrogen unloading in a hydrogen refueling station according to claim 2, wherein, On one side of several core plates of the heat exchange plate group having hydrogen heat exchange grooves, a deflation and gas collection channel is provided. The deflation and gas collection channel is arranged around the edge of the core plate, and the deflation and gas collection channel is provided with an outlet hole; The bottom plate is provided with a gas collection hole, and the outlet holes of several core plates are communicated and then connected to the gas collection hole.