Liquid hydrogen vaporization system

Abstract

The present disclosure provides a liquid hydrogen vaporization system, comprising: a conveying mechanism configured to convey liquid hydrogen; the first heat exchange mechanism is in contact with outside air, so that a liquid working medium in the first heat exchange mechanism absorbs heat of the air and is converted into a gaseous working medium; the second heat exchange mechanism is constructed to receive the gaseous working medium, and the conveying mechanism is partially arranged in the second heat exchange mechanism, so that the liquid hydrogen absorbs heat of the gaseous working medium and is converted into hydrogen, and the gaseous working medium is converted into a liquid working medium; and the cleaning mechanism is arranged on the first heat exchange mechanism and is constructed to filter impurities in the air so as to reduce the contact between the impurities and the first heat exchange mechanism.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to the technical field of vaporizers, and particularly to a liquid hydrogen vaporization system. Background Art

[0002] Liquid hydrogen has advantages such as being convenient for transportation and having a high energy density. To meet the hydrogen usage requirements of users, it is necessary to vaporize liquid hydrogen into normal-temperature hydrogen.

[0003] During the liquid hydrogen vaporization process, a liquid hydrogen vaporizer is usually used. A liquid hydrogen vaporizer is a heat exchange device that uses ambient air as a heat source to convert liquid hydrogen into gaseous hydrogen. During long-term use of the liquid hydrogen vaporizer, impurities such as dust and particles in the ambient air will adhere to the surface of the liquid hydrogen vaporizer, affecting the vaporization performance of the liquid hydrogen vaporizer. Summary of the Invention

[0004] In view of this, the present disclosure provides a liquid hydrogen vaporization system for at least partially solving the above technical problems, reducing impurity adhesion, and improving the vaporization performance of the liquid hydrogen vaporization system.

[0005] An embodiment of the present disclosure provides a liquid hydrogen vaporization system, including a conveying mechanism configured to convey liquid hydrogen; a first heat exchange mechanism in contact with the outside air, such that the liquid working medium in the first heat exchange mechanism absorbs the heat of the air and is converted into a gaseous working medium; a second heat exchange mechanism configured to receive the gaseous working medium, and a part of the conveying mechanism is disposed in the second heat exchange mechanism, such that the liquid hydrogen absorbs the heat of the gaseous working medium and is converted into hydrogen, and the gaseous working medium is converted into the liquid working medium; and a cleaning mechanism disposed in the first heat exchange mechanism and configured to filter impurities in the air to reduce the contact between the impurities and the first heat exchange mechanism.

[0006] According to an embodiment of the present disclosure, the cleaning mechanism includes a filtering component provided with a plurality of sieve holes and configured to allow air to pass through and prevent impurities in the air from passing through.

[0007] According to an embodiment of the present disclosure, the cleaning mechanism further includes: a first connection component connected to the filtering component; and a driving component connected to the first connection component and configured to generate an air flow for sucking the impurities attached to the filtering component.

[0008] According to an embodiment of the present disclosure, the cleaning mechanism further includes a collection component disposed at the bottom of the first heat exchange mechanism to collect impurities and the condensed water generated by the first heat exchange mechanism.

[0009] According to an embodiment of the present disclosure, the cleaning mechanism further includes: a second communication component communicating with the collection component and the driving component; a drainage component communicating with the second communication component to drain the condensed water collected by the collection component; wherein, when the drainage component is closed, the driving component generates an airflow for sucking impurities on the collection component.

[0010] According to an embodiment of the present disclosure, the first heat exchange mechanism includes: a housing component configured to house the liquid working medium; a heat exchange component partially extending into the housing component and configured to guide the liquid working medium to flow into the heat exchange component to absorb the heat of the air and be converted into a gaseous working medium; a first delivery pipe communicating between the second heat exchange mechanism and the housing component to deliver the gaseous working medium; and a second delivery pipe communicating between the second heat exchange mechanism and the housing component to deliver the liquid working medium.

[0011] According to an embodiment of the present disclosure, the heat exchange component includes: a first part located within the housing component, with an open top provided at the top of the first part and higher than the bottom surface of the housing component, such that the liquid working medium in the housing component overflows from the open top into the first part; and a second part communicating with the bottom of the first part and located outside the housing component, configured to guide the liquid working medium to flow to the second part to absorb the heat of the air, so that the liquid working medium is converted into the gaseous working medium.

[0012] According to an embodiment of the present disclosure, fins are provided on the side wall of the second part, the fins surround the second part in a spiral structure, the fins are disconnected to form a plurality of spaced grooves, and the plurality of spaced grooves are oppositely arranged in the extending direction of the second part to form a channel, allowing impurities and moisture to move downward along the channel.

[0013] According to an embodiment of the present disclosure, the bottom of the second heat exchange mechanism is higher than that of the first heat exchange mechanism, such that the liquid working medium in the second heat exchange mechanism flows along the second delivery pipe to the first heat exchange mechanism.

[0014] According to an embodiment of the present disclosure, the liquid hydrogen vaporization system further includes: a collection component for collecting the temperature parameter of the heat exchange component; and a control module configured to respond to the collection component and control the first delivery pipe to close to stop delivering the gaseous working medium when the temperature parameter is less than a preset threshold.

[0015] According to the liquid hydrogen vaporization system provided by the present disclosure, during the process of vaporizing liquid hydrogen into hydrogen, the cleaning mechanism filters impurities in the external air, enabling the first heat exchange mechanism to contact the air after filtering impurities for heat exchange, so that the liquid working medium absorbs the heat of the air and is converted into a gaseous working medium. The second heat exchange mechanism receives the gaseous working medium. The conveying mechanism is partially disposed within the second heat exchange mechanism to contact the gaseous working medium for heat exchange, enabling the liquid hydrogen to absorb the heat of the gaseous working medium and be converted into hydrogen, thus completing the vaporization process. By providing the cleaning mechanism, impurities in the external air are filtered, reducing the contact between impurities and the first heat exchange mechanism, reducing the adhesion of impurities to the surface of the first heat exchange mechanism, reducing the influence of impurity adhesion on the heat exchange between the first heat exchange mechanism and the external air, and improving the vaporization performance of the liquid hydrogen vaporization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Through the following description of the embodiments of the present disclosure with reference to the drawings, the above and other objects, features, and advantages of the present disclosure will become clearer. In the drawings:

[0017] Figure 1 Schematically shows a three-dimensional schematic diagram of a liquid hydrogen vaporization system according to an embodiment of the present disclosure;

[0018] Figure 2 Schematically shows a side view of a second heat exchange mechanism according to an embodiment of the present disclosure;

[0019] Figure 3 Schematically shows another side view of a second heat exchange mechanism according to an embodiment of the present disclosure;

[0020] Figure 4 Schematically shows yet another side view of a second heat exchange mechanism according to an embodiment of the present disclosure;

[0021] Figure 5 Schematically shows a side view of a first heat exchange mechanism according to an embodiment of the present disclosure;

[0022] Figure 6 Schematically shows another side view of a first heat exchange mechanism according to an embodiment of the present disclosure;

[0023] Figure 7 Schematically shows yet another side view of a first heat exchange mechanism according to an embodiment of the present disclosure;

[0024] Figure 8 Schematically shows a partial view of a conveying mechanism according to an embodiment of the present disclosure;

[0025] Figure 9 Schematically shows a three-dimensional schematic diagram of a heat exchange assembly according to an embodiment of the present disclosure;

[0026] Figure 10 Schematically shows a side view of a heat exchange assembly according to an embodiment of the present disclosure;

[0027] Figure 11 Schematically shows another side view of the heat exchange assembly according to an embodiment of the present disclosure; and

[0028] Figure 12 Schematically shows a three-dimensional schematic diagram of the cleaning mechanism according to an embodiment of the present disclosure.

[0029] Reference numerals

[0030] 1. Conveying mechanism; 2. First heat exchange mechanism; 21. Accommodating assembly; 22. Heat exchange assembly; 221. First part; 2211. Open end; 222. Second part; 223. Fins; 224. Spacing groove; 225. Partition board; 226. Housing; 227. Core; 23. First conveying pipe; 231. Air outlet hole; 24. Second conveying pipe; 25. Gas collecting assembly; 26. Support plate; 27. Through hole; 3. Second heat exchange mechanism; 31. Liquid collecting tank; 4. Cleaning mechanism; 41. Filter assembly; 42. First communication assembly; 43. Driving assembly; 44. Collection assembly; 45. Second communication assembly; 46. Drainage assembly; 47. Particle filter. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present disclosure clearer and more understandable, the present disclosure will be further described in detail below with reference to specific embodiments and the accompanying drawings.

[0032] The terms used herein are merely for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising", etc. used herein indicate the presence of the described features, steps, operations and / or components, but do not exclude the presence or addition of one or more other features, steps, operations or components.

[0033] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0034] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning that those skilled in the art usually understand this expression. For example, "a system having at least one of A, B, and C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc. In the case of using expressions such as "at least one of A, B, or C, etc.", generally, it should be interpreted according to the meaning that those skilled in the art usually understand this expression. For example, "a system having at least one of A, B, or C" should include, but not be limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.

[0035] It should also be noted that the directional terms mentioned in the embodiments, such as "up", "down", "front", "back", "left", "right", etc., are only references to the directions in the drawings and are not used to limit the protection scope of the present disclosure. Throughout the drawings, the same elements are denoted by the same or similar reference numerals. When it may cause confusion in the understanding of the present disclosure, the conventional structures or configurations will be omitted.

[0036] A liquid hydrogen vaporizer is a heat exchange device that uses ambient air as a heat source to convert liquid hydrogen into gaseous hydrogen. However, during long-term use of the liquid hydrogen vaporizer, impurities such as dust and particles in the ambient air will adhere to the surface of the liquid hydrogen vaporizer. The impurities affect the heat exchange between the liquid hydrogen vaporizer and the ambient air, reduce the heat exchange efficiency of the liquid hydrogen vaporizer, and cause the vaporization performance of the liquid hydrogen vaporizer to decline.

[0037] An embodiment of the present disclosure provides a liquid hydrogen vaporization system, as Figure 1 shown, the liquid hydrogen vaporization system includes a conveying mechanism 1, a first heat exchange mechanism 2, a second heat exchange mechanism 3, and a cleaning mechanism 4. The conveying mechanism 1 is configured to convey liquid hydrogen. The first heat exchange mechanism 2 is in contact with the outside air, so that the liquid working medium in the first heat exchange mechanism 2 absorbs the heat of the air and is converted into a gaseous working medium. The second heat exchange mechanism 3 is configured to receive the gaseous working medium, and a part of the conveying mechanism 1 is disposed in the second heat exchange mechanism 3, so that the liquid hydrogen absorbs the heat of the gaseous working medium and is converted into hydrogen, and the gaseous working medium is converted into a liquid working medium. The cleaning mechanism 4 is disposed in the first heat exchange mechanism 2 and is configured to filter impurities in the air to reduce the contact between the impurities and the first heat exchange mechanism 2.

[0038] It should be noted that the boiling point of liquid hydrogen is -252.87 °C under standard atmospheric pressure (101.325 kPa). The liquid working medium represents the working medium in a liquid state. The gaseous working medium represents the working medium in a gaseous state. The boiling point of the working medium needs to be higher than that of liquid hydrogen and lower than the temperature of the air in the environment, so as to enable the liquid working medium to absorb the heat of the air and transform into a gaseous working medium, and then enable liquid hydrogen to absorb the heat of the gaseous working medium and transform into hydrogen. Therefore, the working medium can be ammonia, tetrafluoroethane, dichlorofluoromethane, etc., which is not limited herein.

[0039] Specifically, the first heat exchange mechanism 2 has good heat conduction performance to achieve heat exchange by contacting with air, so that the liquid working medium in the first heat exchange mechanism 2 absorbs the heat of the air and transforms into a gaseous working medium. The cleaning mechanism 4 is connected to the first heat exchange mechanism 2 by, but not limited to, welding, bolt connection, clamping or any other connection method to filter impurities in the air and reduce the contact between the impurities and the first heat exchange mechanism 2.

[0040] The second heat exchange mechanism 3 is connected to the first heat exchange mechanism 2 by, but not limited to, pipelines and conveying components to receive the gaseous working medium conveyed by the first heat exchange mechanism 2. The outside of the second heat exchange mechanism 3 can be wrapped with heat insulation and heat preservation materials so that the wall temperature of the second heat exchange mechanism 3 is approximately the same as the ambient temperature, reducing the occurrence of frosting or icing.

[0041] The conveying mechanism 1 includes, but is not limited to, a conveying pipeline and a control valve for conveying liquid hydrogen. In one exemplary embodiment, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, the conveying pipe in the second heat exchange mechanism 3 can be in a serpentine structure. It can be understood that the conveying pipe in the second heat exchange mechanism 3 can also be in a spiral structure, a meandering structure, etc., which is not limited herein. The conveying mechanism 1 has good heat conduction performance, so that liquid hydrogen absorbs the heat of the gaseous working medium and transforms into hydrogen, completing the vaporization process.

[0042] In such an embodiment, the cleaning mechanism 4 is arranged on the first heat exchange mechanism 2, which can filter impurities in the outside air, reduce the contact between the impurities and the first heat exchange mechanism 2, thereby reducing the adhesion of impurities to the surface of the first heat exchange mechanism 2, reducing the influence of the adhesion of impurities on the heat exchange between the first heat exchange mechanism 2 and the outside air, and further improving the vaporization performance of the liquid hydrogen vaporization system.

[0043] In one exemplary embodiment, as Figure 1 、 Figure 5 and Figure 6As shown, the first heat exchange mechanism 2 includes a containment assembly 21, a heat exchange assembly 22, a first delivery pipe 23, and a second delivery pipe 24. The containment assembly 21 is configured to contain a liquid working medium. The heat exchange assembly 22 partially extends into the containment assembly 21 and is configured to guide the liquid working medium to flow into the heat exchange assembly 22 to absorb the heat of the air and transform into a gaseous working medium. The first delivery pipe 23 is connected between the second heat exchange mechanism 3 and the containment assembly 21 to deliver the gaseous working medium. The second delivery pipe 24 is connected between the second heat exchange mechanism 3 and the containment assembly 21 to deliver the liquid working medium.

[0044] In an exemplary embodiment, as Figure 1 , Figure 5 and Figure 6 shown, the containment assembly 21 has a containment space for containing the liquid working medium. For example, the containment assembly 21 can be a box, a tank, etc., which is not limited herein. The containment assembly 21 has good thermal conductivity to exchange heat with the outside air.

[0045] As Figure 1 , Figure 5 and Figure 6 shown, the heat exchange assembly 22 partially extends into the containment assembly 21 and is in communication with the containment assembly 21 to guide the liquid working medium to flow into the heat exchange assembly 22, so that the liquid working medium absorbs the heat of the air and transforms into a gaseous working medium. The heat exchange assembly 22 is disposed at the bottom of the containment assembly 21. It can be understood that the heat exchange assembly 22 can also be disposed on the side wall of the containment assembly 21 to guide the liquid working medium to flow into the heat exchange assembly 22. The top of the heat exchange assembly 22 is higher than the bottom surface of the containment assembly 21 to partially extend into the containment assembly 21. It can be understood that the top of the heat exchange assembly 22 can also be substantially flush with the ground of the containment assembly 21 to guide the liquid working medium to flow into the heat exchange assembly 22. As Figure 7 shown, a plurality of heat exchange assemblies 22 are provided and are spaced apart.

[0046] The heat exchange assembly 22 has good thermal conductivity and can achieve efficient heat transfer at a relatively small temperature difference. Specifically, when the liquid working medium is liquid ammonia, the temperature of the liquid ammonia is below -33.34 °C, and the temperature of the air is generally greater than zero. The heat exchange assembly 22 can efficiently transfer the heat of the air to the liquid working medium, so that the liquid working medium absorbs the heat of the air and transforms into a gaseous working medium.

[0047] As Figure 1 and Figure 8As shown, the first delivery pipe 23 is connected between the top of the accommodation assembly 21 and the second heat exchange mechanism 3 to deliver the gaseous working medium. A plurality of air outlet holes 231 are provided in the first delivery pipe 23 located in the second heat exchange mechanism 3, and the plurality of air outlet holes 231 face the delivery mechanism 1, so that the gaseous working medium ejected from the air outlet holes 231 contacts the delivery mechanism 1, so that the liquid hydrogen in the delivery mechanism 1 absorbs the heat of the gaseous working medium and is converted into hydrogen gas.

[0048] As Figure 1 shown, the second delivery pipe 24 is connected between the bottom of the second heat exchange mechanism 3 and the accommodation assembly 21 to deliver the liquid working medium. Therefore, the accommodation assembly 21, the first delivery pipe 23, the second heat exchange mechanism 3 and the second delivery pipe 24 form a sealed closed loop. The second delivery pipe 24 can be wrapped with heat-insulating and heat-preserving materials, so that the wall temperature of the second delivery pipe 24 is approximately the same as the ambient temperature, reducing the occurrence of frosting or icing.

[0049] According to an embodiment of the present disclosure, the liquid working medium absorbs the heat of the air through the heat exchange component 22 and is converted into a gaseous working medium, and then the gaseous working medium is transported along the first delivery pipe 23 to the second heat exchange mechanism 3. The liquid hydrogen in the delivery mechanism 1 absorbs the heat of the gaseous working medium and is converted into hydrogen gas, completing the vaporization process. At the same time, the gaseous working medium condenses and is converted into a liquid working medium, and then the liquid working medium is transported along the second delivery pipe 24 to the accommodation assembly 21, realizing recycling to continuously convert liquid hydrogen into hydrogen gas.

[0050] In an exemplary embodiment, as Figure 1 shown, the first heat exchange mechanism 2 may be a sealed box. The first heat exchange mechanism 2 further includes a gas collection assembly 25, and the gas collection assembly 25 is located at the top of the accommodation assembly 21 and is connected to the accommodation assembly 21 and the first delivery pipe 23. The gas collection assembly 25 is a cover structure with a gradually decreasing cross-section from bottom to top, so as to converge the gaseous working medium and then transport it to the second heat exchange mechanism 3 through the first delivery pipe 23.

[0051] In an exemplary embodiment, as Figure 1 shown, the second heat exchange mechanism 3 further includes a liquid collection tank 31, and the liquid collection tank 31 is arranged at the bottom of the second heat exchange mechanism 3. The cross-section of the liquid collection tank 31 continuously decreases from top to bottom, so that the liquid working medium in the second heat exchange mechanism 3 flows downward to the liquid collection tank 31, facilitating the liquid collection tank 31 to collect the liquid working medium.

[0052] In an exemplary embodiment, as Figure 1 shown, the bottom of the second heat exchange mechanism 3 is higher than the first heat exchange mechanism 2, that is, the bottom of the liquid collection tank 31 is higher than the first heat exchange mechanism 2, so that the liquid working medium in the second heat exchange mechanism 3 flows along the second delivery pipe 24 to the first heat exchange mechanism 2.

[0053] According to an embodiment of the present disclosure, the bottom of the liquid collection tank 31 is higher than the first heat exchange mechanism 2, so that the liquid working medium in the liquid collection tank 31 flows through the second delivery pipe 24 into the accommodation assembly 21 under the action of gravity, realizing power-free delivery and reducing energy consumption.

[0054] In an exemplary embodiment, as Figure 1 and Figure 9 shown, the heat exchange assembly 22 includes a first part 221 and a second part 222. The first part 221 is located inside the accommodation assembly 21. An opening 2211 is provided at the top of the first part 221 and is higher than the bottom surface of the accommodation assembly 21, so that the liquid working medium in the accommodation assembly 21 overflows from the opening 2211 into the first part 221. The second part 222 is communicated with the bottom of the first part 221 and is located outside the accommodation assembly 21, and is configured to guide the liquid working medium to flow into the second part 222 to absorb the heat of the air, so that the liquid working medium is converted into a gaseous working medium.

[0055] It should be noted that the liquid working medium in the second heat exchange mechanism 3 continuously flows through the second delivery pipe 24 into the accommodation assembly 21. The liquid working medium in the accommodation assembly 21 continuously increases. Since the top of the first part 221 is higher than the bottom surface of the accommodation assembly 21, when the liquid level of the liquid working medium reaches the top of the first part 221, the liquid working medium flows into the first part 221 from the opening 2211 by overflow. Therefore, a liquid working medium layer with a certain liquid level height is formed at the bottom of the accommodation assembly 21 to fully absorb the heat of the bottom of the accommodation assembly 21 and the top of the heat exchange assembly 22 in contact with the air, reducing heat dissipation.

[0056] The first part 221 and the second part 222 can be an integral structure, and the second part 222 is communicatively arranged at the bottom of the first part 221. The heat exchange assembly 22 formed by the first part 221 and the second part 222 is vertically arranged. It can be understood that the heat exchange assembly 22 can also form an angle with the horizontal plane, which is specifically defined according to actual needs to guide the liquid working medium to flow into the first part 221 and the second part 222.

[0057] According to an embodiment of the present disclosure, the second part 222 is located outside the accommodation assembly 21. The second part 222 is in contact with the air to absorb the heat of the air, so that the liquid working medium is converted into a gaseous working medium. The gaseous working medium flows from the second part 222 to the first part 221 and flows out from the opening 2211 at the top of the first part 221, and then flows through the first delivery pipe 23 to the second heat exchange mechanism 3, so that the liquid hydrogen absorbs the heat of the gaseous working medium and is converted into hydrogen.

[0058] In an exemplary embodiment, as Figure 1 、 Figure 9 、 Figure 10 and Figure 11As shown, the first part 221 and the second part 222 both include a housing 226 and a core 227. The housing 226 is configured to absorb the heat of the air. The core 227 is disposed within the housing 226 and forms a communicating flow channel with the opening 2211. The core 227 is configured to guide the liquid working medium into the housing 226, so that the gaseous working medium generated by the liquid working medium absorbing the heat of the air flows out of the housing 226 along the flow channel.

[0059] Specifically, the housing 226 is generally made of a metal material with good thermal conductivity to absorb the heat of the air. For example, copper, aluminum, etc., which are not limited herein and are specifically defined according to actual needs. The core 227 is located on the inner wall of the housing 226 and is generally made of a porous material, such as a wire mesh, fiber, carbon nanotube, etc., which are specifically defined according to actual needs and have good capillary action to transport the liquid working medium.

[0060] According to an embodiment of the present disclosure, the liquid working medium flows to the opening 2211 at the top of the first part 221. Under the capillary action of the core 227, the liquid working medium sequentially flows through the first part 221 and the second part 222 along the core 227. The second part 222 contacts the air and absorbs the heat of the air to form a heating end, so that the liquid working medium absorbs the heat of the air and is converted into a gaseous working medium, and the gaseous working medium flows upward out of the flow channel.

[0061] In one exemplary embodiment, as Figure 1 and Figure 12 shown, the cleaning mechanism 4 includes a filtering component 41 provided with a plurality of sieve holes (not shown in the figure), which is configured to allow air to pass through and prevent impurities in the air from passing through.

[0062] Specifically, the filtering component 41 can be a combined structure of a cover body and a filtering element. The cover body is provided with sieve holes to allow air to pass through and preliminarily filter impurities in the air. The filtering element can be a gauze, a sieve mesh, etc. The filtering element is located within the cover body to further filter impurities in the air. The filtering component 41 can also be a sieve mesh provided with sieve holes that allow air to pass through and prevent impurities in the air from passing through. It can be understood that the filtering component 41 can also be an air filter, a fiber filter, an activated carbon filter, etc., which are specifically defined according to actual needs.

[0063] According to an embodiment of the present disclosure, the filtering component 41 is disposed at the bottom of the accommodating component 21 and surrounds the heat exchange component 22. The filtering component 41 filters impurities in the air, reduces the entry of impurities into the filtering component 41, thereby reducing the contact and adhesion of impurities with the heat exchange component 22 and the bottom of the accommodating component 21, and reducing the influence of impurity adhesion on the heat exchange of the first heat exchange mechanism 2, and improving the vaporization performance of the liquid hydrogen vaporization system.

[0064] In one exemplary embodiment, as Figure 1and Figure 12 As shown in Figure 12 , the cleaning mechanism 4 further includes a first connection component 42 and a driving component 43. The first connection component 42 is connected to the filtering component 41. The driving component 43 is connected to the first connection component 42 and is configured to generate an air flow for sucking the impurities attached to the filtering component 41.

[0065] Specifically, the first connection component 42 may be a connecting pipe, and the connecting pipe is connected to the housing of the filtering component 41. The driving component 43 is connected to the first connection component 42 and is configured to generate an air flow for sucking the impurities attached to the filtering component 41. The driving component 43 may be a driving pump, a blower, an axial flow fan, etc., which is not limited herein.

[0066] According to an embodiment of the present disclosure, during the process of the filtering component 41 filtering impurities in the air, the impurities will adhere to the side of the filtering component 41 facing away from the heat exchange component 22. The direction of the air flow generated by the first connection component 42 and the driving component 43 is opposite to the direction of the air flowing to the heat exchange component 22, or is located on the side of the filtering component 41 facing away from the heat exchange component 22, so as to carry away the impurities through the air flow, clean the impurities attached to the filtering component 41, reduce the influence of the attached impurities on the air flow, reduce the influence on the heat exchange of the first heat exchange mechanism 2, and improve the vaporization performance of the liquid hydrogen vaporization system.

[0067] In an exemplary embodiment, as Figure 1 and Figure 12 shown, the cleaning mechanism 4 further includes a particle filter 47, which is disposed between the first connection component 42 and the driving component 43 to filter and collect particulate impurities and reduce the influence of the particulate impurities on the driving component 43.

[0068] In an exemplary embodiment, as Figure 1 and Figure 12 shown, the cleaning mechanism 4 further includes a collection component 44, which is disposed at the bottom of the first heat exchange mechanism 2 to collect impurities and the condensed water generated by the first heat exchange mechanism 2.

[0069] Specifically, the collection component 44 includes, but is not limited to, being disposed at the bottom of the accommodation component 21 through welding, bolt connection, snap connection or any other connection method and being located below the heat exchange component 22. The collection component 44 has a storage space to collect impurities and the condensed water generated by the first heat exchange mechanism 2.

[0070] According to an embodiment of the present disclosure, the liquid working medium is located in the heat exchange component 22, the temperature of the liquid working medium is lower than the temperature of the air, and condensed water will be generated when the air contacts the heat exchange component 22. The condensed water and some impurities will flow into the collection component 44 under the action of gravity.

[0071] In an exemplary embodiment, as Figure 12As shown, the bottom of the collection component 44 gradually converges inwards from top to bottom, so that the collected condensed water and impurities converge and are discharged conveniently, in order to reduce the residual condensed water and impurities in the collection component 44.

[0072] In an exemplary embodiment, as Figure 12 shown, a support plate 26 is provided at the top of the collection component 44. The bottom of the heat exchange component 22 is mounted on the support plate 26. The support plate 26 provides a supporting force for the heat exchange component 22. Through holes 27 are also provided on the support plate 26 to allow condensed water and impurities to flow downward through the through holes 27 to the collection component 44.

[0073] In an exemplary embodiment, as Figure 1 and Figure 12 shown, the cleaning mechanism 4 further includes a second communication component 45 and a drainage component 46. The second communication component 45 is communicated with the collection component 44 and the driving component 43. The drainage component 46 is communicated with the second communication component 45 to drain the condensed water collected by the collection component 44. Wherein, when the drainage component 46 is closed, the driving component 43 generates an air flow to suck the impurities on the collection component 44

[0074] Specifically, the second communication component 45 can be a communication pipe, and the second communication component 45 is communicated with the collection component 44 and the driving component 43. Driven by the driving component 43, a suction air flow can be generated around the heat exchange component 22 and the collection component 44, so as to drive the impurities and condensed water on the heat exchange component 22 and the collection component 44 to flow into the second communication component 45, thereby cleaning the heat exchange component 22 and the collection component 44, reducing the influence on the heat exchange of the first heat exchange mechanism 2, and improving the vaporization performance of the liquid hydrogen vaporization system.

[0075] The drainage component 46 is communicated with the second communication component 45 to drain the condensed water collected by the collection component 44. The drainage component 46 can include a drainage pipe and a drainage valve, and the drainage valve is used to control the opening or closing of the drainage pipe to drain the condensed water as needed.

[0076] In an exemplary embodiment, as Figure 12 shown, the first communication component 42 is communicated with the second communication component 45, and only one driving component 43 is needed. Control valves are provided on both the first communication component 42 and the second communication component 45, and the first communication component 42 and the second communication component 45 can be controlled to be used simultaneously or independently through the control valves.

[0077] In an exemplary embodiment, as Figure 9 、 Figure 10 and Figure 11As shown, fins 223 are provided on the side wall of the second part 222, and the fins 223 surround the second part 222 to form a spiral structure. The fins 223 are disconnected to form a plurality of spaced grooves 224, and the plurality of spaced grooves 224 are oppositely arranged in the extending direction of the second part 222 to form a channel, so as to allow impurities and moisture to move downward along the channel.

[0078] Specifically, the second part 222 is vertically arranged, and the fins 223 are arranged on the side wall of the second part 222 and are wound into a spiral structure from top to bottom in the vertical direction. By providing the fins 223, the contact area between the second part 222 and the air is increased, and the heat exchange efficiency of the second part 222 is improved.

[0079] The fins 223 are disconnected in the circumferential direction of the second part 222 to form the spaced grooves 224. The width of the spaced grooves 224 is 3 mm - 20 mm. The plurality of spaced grooves 224 are oppositely arranged in the vertical direction to form a channel ( Figure 11 the vertical channel in). In the radial direction of the second part 222, the size of the fins 223 is the same as that of the spaced grooves 224.

[0080] According to an embodiment of the present disclosure, there will be condensed water and impurities on the fins 223. When the second communication component 45 and the driving component 43 are opened, part of the condensed water and impurities will flow downward along the fins 223 under the action of the air flow suction generated by the driving component 43 and gravity. By providing the spaced grooves 224, after the condensed water and impurities flow to the spaced grooves 224, they directly flow downward in the channel formed by the spaced grooves 224, reducing the travel of the condensed water and impurities flowing along the fins 223, facilitating the separation of the condensed water and impurities from the fins 223, reducing the heat exchange efficiency of the heat exchange component 22 caused by the attachment of impurities, and improving the vaporization performance of the liquid hydrogen vaporization system.

[0081] In an exemplary embodiment, as Figure 9 、 Figure 10 and Figure 11 shown, the spaced grooves 224 are located on the downstream side of the fins 223 ( Figure 11 the left side of the spaced grooves 224 in the middle) is provided with a partition 225, and the partition 225 connects each fin 223 on the same side in the spaced grooves 224. The partition 225 is made of a hydrophobic material to reduce the attachment of condensed water to the partition 225 and reduce the occurrence of frosting or icing. For example, the hydrophobic material can be polytetrafluoroethylene, polyethylene, carbon nanotubes, etc., which are not limited herein.

[0082] According to an embodiment of the present disclosure, under the action of the air flow suction generated by the driving component 43 and gravity, part of the condensed water and impurities on the fin 223 will flow downward along the fin 223. Since the impurities and condensed water have a velocity in the horizontal direction, part of the impurities and condensed water will flow across the spacing groove 224 and flow onto the adjacent fin 223. By providing the partition plate 225, part of the impurities and condensed water are blocked, so that the impurities and condensed water flow downward in the spacing groove 224, further increasing the travel distance of the condensed water and impurities flowing along the fin 223, facilitating the detachment of the condensed water and impurities from the fin 223, reducing the influence of impurity adhesion on the heat exchange efficiency of the heat exchange component 22, and improving the vaporization performance of the liquid hydrogen vaporization system.

[0083] In an exemplary embodiment, the liquid hydrogen vaporization system further includes a collection component (not shown in the figure) and a control module (not shown in the figure). The collection component is configured to collect the temperature parameter of the heat exchange component 22. The control module is configured to respond to the collection component and, when the temperature parameter is less than a preset threshold, control the first delivery pipe 23 to close to stop delivering the gaseous working medium.

[0084] Specifically, the collection component can be a temperature sensor to collect the temperature parameter of the heat exchange component 22. The preset threshold can be 0.1 °C. It can be understood that the preset threshold can also be 0.2 °C, 0.3 °C, 0.4 °C, 0.5 °C, etc., which is specifically determined according to actual needs. When the temperature parameter is less than the preset threshold, it indicates that frosting or icing is about to occur on the surface of the heat exchange component 22.

[0085] According to an embodiment of the present disclosure, by providing the collection component and the control module, when the temperature parameter is less than the preset threshold, the control module controls the first delivery pipe 23 to close to stop delivering the gaseous working medium, block the delivery of the gaseous working medium to the second heat exchange mechanism 3, stop the heat exchange of the second heat exchange mechanism 3, prevent the gaseous working medium from being converted into a liquid working medium, thereby stop delivering the liquid working medium to the first heat exchange mechanism 2, stop the heat exchange of the heat exchange component 22, and avoid frosting or icing on the heat exchange component 22.

[0086] According to the liquid hydrogen vaporization system provided in this embodiment, during the process of vaporizing liquid hydrogen into hydrogen, the cleaning mechanism 4 filters impurities in the outside air, so that the first heat exchange mechanism 2 contacts the filtered air to exchange heat, so that the liquid working medium absorbs the heat of the air and is converted into a gaseous working medium. The second heat exchange mechanism 3 receives the gaseous working medium. The delivery mechanism 1 is partially disposed in the second heat exchange mechanism 3 to exchange heat with the gaseous working medium, so that the liquid hydrogen absorbs the heat of the gaseous working medium and is converted into hydrogen, completing the vaporization process. By providing the cleaning mechanism 4, impurities in the outside air are filtered, reducing the contact between the impurities and the first heat exchange mechanism 2, reducing the adhesion of the impurities to the surface of the first heat exchange mechanism 2, reducing the influence of impurity adhesion on the heat exchange between the first heat exchange mechanism 2 and the outside air, and improving the vaporization performance of the liquid hydrogen vaporization system.

[0087] The embodiments of the present disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and these substitutions and modifications should all fall within the scope of the present disclosure.

Claims

1. A liquid hydrogen vaporization system, characterized in that: include: A delivery mechanism (1) configured to deliver liquid hydrogen; The first heat exchange mechanism (2) is in contact with the external air, so that the liquid working medium in the first heat exchange mechanism (2) absorbs the heat of the air and is converted into a gaseous working medium; a second heat exchange mechanism (3) configured to receive the gaseous working medium, wherein the delivery mechanism (1) is partially disposed in the second heat exchange mechanism (3), so that the liquid hydrogen absorbs the heat of the gaseous working medium and is converted into hydrogen, and the gaseous working medium is converted into the liquid working medium; and The cleaning mechanism (4) is arranged on the first heat exchange mechanism (2) and is configured to filter impurities in the air to reduce the contact between the impurities and the first heat exchange mechanism (2).

2. The liquid hydrogen vaporization system according to claim 1, characterized in that: The cleaning mechanism (4) comprises a filter assembly (41) provided with a plurality of sieve holes and configured to allow air to pass through and prevent impurities in the air from passing through.

3. The liquid hydrogen vaporization system according to claim 2, characterized in that: The cleaning mechanism (4) further comprises: a first communication component (42), communicating with the filter component (41); and The driving component (43) is connected to the first connecting component (42) and is configured to generate an airflow for sucking impurities attached to the filter component (41).

4. The liquid hydrogen vaporization system according to claim 1, characterized in that: The cleaning mechanism (4) further comprises a collecting component (44) which is arranged at the bottom of the first heat exchange mechanism (2) to collect impurities and condensed water generated by the first heat exchange mechanism (2).

5. The liquid hydrogen vaporization system according to claim 4, characterized in that: The cleaning mechanism (4) further comprises: a second communication component (45) communicating with the collecting component (44) and the driving component (43); and a drainage component (46) connected to the second communication component (45) to discharge the condensed water collected by the collection component (44); Wherein, when the drainage component (46) is closed, the driving component (43) generates an airflow to suck impurities on the collecting component (44).

6. The liquid hydrogen vaporization system according to claim 1, characterized in that: The first heat exchange mechanism (2) comprises: A containing component (21) configured to contain the liquid working medium; A heat exchange component (22) partially extends into the containing component (21) and is configured to guide the liquid working medium to flow into the heat exchange component (22) to absorb heat from the air and convert it into a gaseous working medium; a first delivery pipe (23) connected between the second heat exchange mechanism (3) and the containing assembly (21) to deliver the gaseous working medium; and A second delivery pipe (24) is connected between the second heat exchange mechanism (3) and the containing assembly (21) to deliver the liquid working medium.

7. The liquid hydrogen vaporization system according to claim 6, characterized in that: The heat exchange component (22) comprises: A first part (221) is located in the containing assembly (21), the top of the first part (221) is provided with an opening and is higher than the bottom surface of the containing assembly (21), so that the liquid working medium in the containing assembly (21) overflows from the opening into the first part (221); and The second part (222) is communicated with the bottom of the first part (221) and is located outside the containing assembly (21), and is configured to guide the liquid working medium to flow to the second part (222) to absorb heat from the air, so that the liquid working medium is converted into the gaseous working medium.

8. The liquid hydrogen vaporization system according to claim 7, characterized in that: The side wall of the second part (222) is provided with a fin (223), and the fin (223) surrounds the second part (222) to form a spiral structure. The fin (223) is broken to form a plurality of spacing grooves (224). The plurality of spacing grooves (224) are relatively arranged in the extension direction of the second part (222) to form a channel to allow impurities and moisture to move downward along the channel.

9. The liquid hydrogen vaporization system according to claim 6, characterized in that: The bottom of the second heat exchange mechanism (3) is higher than the first heat exchange mechanism (2), so that the liquid working medium in the second heat exchange mechanism (3) flows along the second delivery pipe (24) to the first heat exchange mechanism (2).

10. The liquid hydrogen vaporization system according to claim 6, characterized in that: Also includes: A collection component for collecting temperature parameters of the heat exchange component (22); as well as The control module is configured to, in response to the collection component, control the first delivery pipe (23) to close in order to stop delivering the gaseous working medium when the temperature parameter is less than a preset threshold.

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