Combined control valve and on-board gas supply system

Abstract

The application provides a combination control valve and a vehicle-mounted gas supply system, and belongs to the field of new energy vehicles. The combination control valve is used in a gas fuel cell vehicle, has a main channel and at least one branch channel connected with the main channel, and comprises an electromagnetic valve and a flow limiting valve arranged in sequence along the gas flow direction on the main channel. One of the branch channels located upstream of the electromagnetic valve is a gas filling branch channel, the gas filling branch channel is used for being connected with a gas filling port of the vehicle, and a one-way valve for allowing fuel gas to flow into the main channel in one direction is arranged on the gas filling branch channel. The vehicle-mounted gas supply system comprises the combination control valve. The application solves the technical problems of the prior art, such as complex structure, bloated function and high cost of the vehicle-mounted gas supply system.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicles, and in particular relates to a combined control valve and an on-board air supply system. Background Technology

[0002] Gas fuel cell vehicles are an important future development direction for new energy vehicles. Gas fuel cell vehicles use combustible gases such as hydrogen and methane as fuel. The fuel system used to store and supply the gas is the on-board gas supply system. The gas storage cylinder used to store high-pressure fuel gas in the on-board gas supply system is its core component.

[0003] Due to the need for extended driving range, some vehicles require 2 to 12 gas cylinders. To ensure safety, the on-board gas supply system is required to equip each gas cylinder with a high-pressure gas cylinder combination valve (referred to as a "cylinder valve"). Each cylinder valve typically includes functional components such as a solenoid valve, filter, manual shut-off valve, manual relief valve, check valve, temperature-driven safety relief device (TPRD), and flow restrictor valve. This results in a complex overall structure for the on-board gas supply system, a large number of core components, and bloated functions, which is not conducive to reducing overall costs. Summary of the Invention

[0004] The purpose of this invention is to provide a vehicle-mounted air supply system to solve the technical problems of complex structure, bloated functions, and high cost of existing vehicle-mounted air supply systems.

[0005] The purpose of this invention is to provide a combined control valve to solve the same technical problems when applied to vehicle air supply systems.

[0006] To achieve the above objectives, the technical solution of the vehicle-mounted air supply system provided by the present invention is as follows: A vehicle-mounted gas supply system includes at least two gas cylinders for storing fuel gas, each gas cylinder being equipped with an opening and closing valve for independently controlling the gas supply; it also includes a combined control valve having a main channel and at least one branch channel connected to the main channel. The combined control valve includes a solenoid valve and a flow-limiting valve arranged sequentially along the gas flow direction on the main channel. One of the branch channels located upstream of the solenoid valve is a refueling branch channel for connecting to the vehicle's refueling port. The refueling branch channel is equipped with a one-way valve for allowing fuel gas to flow unidirectionally into the main channel; each gas cylinder is equipped with a gas supply channel, and the gas supply channels converge and connect to the upstream end of the main channel.

[0007] The beneficial effects are as follows: The vehicle-mounted gas supply system provided by this invention is a pioneering invention. This solution integrates a solenoid valve, a flow-limiting valve, and a one-way valve for refueling into a combined control valve. The solenoid valve can be electrically controlled to control the on / off state of the main channel, determining whether the entire vehicle-mounted gas supply system supplies fuel gas to the internal combustion engine. The flow-limiting valve is used to stabilize the fuel gas supply flow within a set range. During refueling, the solenoid valve is closed, allowing the fuel gas to flow counter-currently within the main channel and enter each gas cylinder. After the vehicle's internal combustion engine starts, the fuel gas enters the main channel from the upstream end and flows forward through the refueling branch channel, the solenoid valve, and the flow-limiting valve, finally exiting from the combined control valve at the downstream end of the main channel. Compared to existing solutions, this solution allows for centralized control of the fuel gas on / off state and flow rate, making control easier and eliminating error accumulation in flow control, resulting in more accurate control. Moreover, this allows for a simpler structure of the valve device at the gas cylinder opening, requiring only an opening and closing valve, effectively reducing the number of components at the opening and thus lowering the overall cost of the vehicle-mounted gas supply system.

[0008] As a further improvement, one of the branch channels located upstream of the solenoid valve is an automatic pressure relief channel. The automatic pressure relief channel is located adjacent to the upstream end of the main channel. The automatic pressure relief channel is equipped with a total control temperature-driven safety pressure relief device. The end of the automatic pressure relief channel is a vent for releasing fuel gas.

[0009] The beneficial effects are: the overall temperature-driven safety relief device can automatically control the opening and closing of the automatic pressure relief channel according to the ambient temperature. When the ambient temperature exceeds the set safety threshold, it can automatically open the automatic pressure relief channel, allowing fuel gas to be discharged in a timely manner to prevent safety accidents. When the overall temperature-driven safety relief device is installed only in the combined control valve, the fuel gas in all gas cylinders is depressurized by this device. When the overall temperature-driven safety relief device is installed in the combined control valve, and also at each gas cylinder, the cylinder-end temperature-driven safety relief device can open individually when the ambient temperature rises abnormally, providing an independent pressure relief channel for each gas cylinder, resulting in higher pressure relief efficiency. Simultaneously, the overall temperature-driven pressure relief device can also be opened, providing additional pressure relief channels for each gas cylinder, further improving pressure relief efficiency.

[0010] As a further improvement, a shut-off valve for controlling the opening and closing of the main channel is installed on the main channel, and the shut-off valve is located upstream of the gas refueling branch channel.

[0011] The beneficial effect is that the shut-off valve is designed to increase the means of cutting off and regulating flow, thereby enhancing the reliability of the vehicle-mounted air supply system.

[0012] As a further improvement, one of the branch channels is a manual relief channel. The inlet of the manual relief channel is connected to the section of the main channel upstream of the solenoid valve, and the outlet of the manual relief channel is connected to the section of the main channel downstream of the flow restrictor valve. A manual relief valve is installed on the manual relief channel.

[0013] The beneficial effect is that by integrating the manual relief valve into the combined control valve, there is no need to configure a manual relief valve at the main valve, which further simplifies the structure of the main valve.

[0014] To achieve the above objectives, the technical solution of the combined control valve provided by this invention is as follows: A combined control valve for a gas fuel cell vehicle has a main channel and at least one branch channel connected to the main channel. The combined control valve includes a solenoid valve and a flow restrictor valve arranged sequentially along the gas flow direction on the main channel. One of the branch channels located upstream of the solenoid valve is a refueling branch channel for connecting to the vehicle's refueling port. A one-way valve is provided on the refueling branch channel to allow fuel gas to flow unidirectionally into the main channel.

[0015] The beneficial effects are as follows: The combined control valve provided by this invention is a pioneering invention. This solution integrates a solenoid valve, a flow-limiting valve, and a one-way valve for refueling into a combined control valve. The solenoid valve can be electrically controlled to control the on / off state of the main channel, determining whether the entire vehicle gas supply system supplies fuel gas to the internal combustion engine. The flow-limiting valve is used to stabilize the fuel gas supply flow rate within a set range. During refueling, the solenoid valve is closed, allowing the fuel gas to flow counter-currently in the main channel and enter each gas cylinder. After the vehicle's internal combustion engine starts, the fuel gas enters the main channel from the upstream end and flows forward through the refueling branch channel, the solenoid valve, and the flow-limiting valve, finally exiting the combined control valve from the downstream end of the main channel. Compared to existing solutions, this solution allows for centralized control of the fuel gas on / off state and flow rate, making control easier and eliminating error accumulation in flow control, resulting in more accurate control. Moreover, when this combined control valve is applied to the corresponding vehicle-mounted gas supply system, the structure of the valve device configured at the gas cylinder opening can be simplified. Only the opening and closing valve at the cylinder opening needs to be configured, which can effectively reduce the number of components configured at the cylinder opening, thereby reducing the overall cost of the vehicle-mounted gas supply system.

[0016] As a further improvement, one of the branch channels located upstream of the solenoid valve is an automatic pressure relief channel. The automatic pressure relief channel is adjacent to the upstream end of the main channel. The automatic pressure relief channel is equipped with a first temperature-driven safety pressure relief device. The end of the automatic pressure relief channel is a vent for releasing fuel gas.

[0017] The beneficial effects are: the overall temperature-driven safety relief device can automatically control the opening and closing of the automatic pressure relief channel according to the ambient temperature. When the ambient temperature exceeds the set safety threshold, it can automatically open the automatic pressure relief channel, allowing fuel gas to be discharged in a timely manner to prevent safety accidents. When the overall temperature-driven safety relief device is installed only in the combined control valve, the fuel gas in all gas cylinders is depressurized by this device. When the overall temperature-driven safety relief device is installed in the combined control valve, and also at each gas cylinder, the cylinder-end temperature-driven safety relief device can open individually when the ambient temperature rises abnormally, providing an independent pressure relief channel for each gas cylinder, resulting in higher pressure relief efficiency. Simultaneously, the overall temperature-driven pressure relief device can also be opened, providing additional pressure relief channels for each gas cylinder, further improving pressure relief efficiency.

[0018] As a further improvement, a shut-off valve for controlling the opening and closing of the main channel is installed on the main channel, and the shut-off valve is located upstream of the gas refueling branch channel.

[0019] The beneficial effect is that the shut-off valve is designed to increase the means of cutting off and regulating flow, thereby enhancing the reliability of the vehicle-mounted air supply system.

[0020] As a further improvement, one of the branch channels is a manual relief channel. The inlet of the manual relief channel is connected to the section of the main channel upstream of the solenoid valve, and the outlet of the manual relief channel is connected to the section of the main channel downstream of the flow restrictor valve. A manual relief valve is installed on the manual relief channel.

[0021] The beneficial effect is that by integrating the manual relief valve into the combined control valve, there is no need to configure a manual relief valve at the main valve, which further simplifies the structure of the main valve.

[0022] As a further improvement, the combined control valve includes a mounting base, a main channel and a branch channel which are respectively formed into the interior of the mounting base, and a mounting hole that communicates with the main channel or the branch channel is also formed on the outer side of the mounting base. The mounting hole is used to install the components constituting the combined control valve.

[0023] The benefits are: the solution has a higher degree of integration, can be manufactured and used as an independent product, occupies less space, and has higher reliability.

[0024] As a further improvement, the outer surface of the mounting base is formed with at least two converging holes that connect to the upstream end of the main channel. The openings of the converging holes are used to connect to the gas supply pipes of the gas storage cylinders. The converging holes are used to allow the fuel gas supplied by each gas storage cylinder to converge and flow into the upstream end of the main channel.

[0025] The beneficial effects are: in this scheme, the opening of each manifold on the surface of the mounting base is an interface for connecting to the gas supply pipeline. Although there are many interfaces, it simplifies the layout of the gas supply pipeline, facilitates the connection operation, and also reduces the failure rate of the gas supply pipeline. Attached Figure Description

[0026] Figure 1 A schematic diagram of the original scheme for the vehicle-mounted air supply system; Figure 2 A schematic diagram of the cylinder valve in the original scheme of the vehicle-mounted gas supply system; Figure 3 This is a schematic diagram of one embodiment of the vehicle-mounted air supply system of the present invention; Figure 4 This is a schematic diagram of the combined control valve in one embodiment of the vehicle-mounted air supply system of the present invention; Figure 5 This is an external view of the combined control valve in one embodiment of the vehicle-mounted air supply system of the present invention; Figure 6 This is a cross-sectional view of the combined control valve in one embodiment of the vehicle-mounted air supply system of the present invention.

[0027] Explanation of reference numerals in the attached figures: 1. Gas cylinder; 2. Cylinder valve; 21. Cylinder port filter; 22. Cylinder port flow restrictor valve; 23. Cylinder port check valve; 24. Cylinder port on / off valve; 25. Cylinder port manual vent valve; 26. Cylinder port solenoid valve; 27. Cylinder port temperature-driven safety pressure relief device; 3. Diverter; 4. Pressure reducing valve; 5. Combined control valve; 51. Mounting base; 511. Main channel; 512. Upstream end; 513. Downstream end; 514. Gas filling branch channel; 515. Manual vent. 516. Automatic pressure relief channel; 517. Manifold; 518. Stepped structure; 519. Filter mounting hole; 5110. Boss; 52. Solenoid valve; 53. Flow limiting valve; 54. Check valve; 55. Filter; 56. Manual relief valve; 57. Main control temperature driven pressure relief device; 58. Shut-off valve; 6. Bottle end temperature driven safety pressure relief device; 7. Bottle end pressure relief channel; 8. Temperature sensor; 9. Gas supply pipeline; 10. Gas filling port. Specific Implementation

[0028] The present invention will be further described in detail below with reference to the embodiments.

[0029] Specific embodiments of the vehicle-mounted air supply system provided by this invention: This on-board gas supply system is used in gas fuel cell vehicles as a structure that stores fuel gases and supplies them to the internal combustion engine. The fuel gases include hydrogen and methane, among others.

[0030] In the previous plan, see Appendix Figure 1 and attached Figure 2 The vehicle-mounted gas supply system is equipped with a cylinder valve 2 for each gas cylinder 1. The branch pipes connected to each gas cylinder 1 converge and connect to a distributor 3. The other two ports of the distributor 3 are connected to a hydrogen refueling port and a pressure reducing valve 4, respectively. The cylinder valve 2 specifically includes a cylinder port filter 21, a cylinder port flow restrictor valve 22, a cylinder port check valve 23, a cylinder port on / off valve 24, a cylinder port manual release valve 25, a cylinder port solenoid valve 26, and a cylinder port temperature-driven safety pressure relief device 27, among other components. In previous solutions, the cylinder valve 2 integrated the above components together. The cylinder valve 2 has a complex airflow channel inside and a large number of components, resulting in a high cost for each cylinder valve 2 and a high overall cost for the vehicle-mounted gas supply system.

[0031] In the improved design, the original distributor 3 was replaced with a combined control valve 5. The combined control valve 5 not only functions as the original distributor 3 to achieve fuel gas diversion control, but also integrates the functions of some components in the original cylinder valve 2. It can perform overall on / off control and venting operations of fuel gas supply at the combined control valve 5. In the improved design, the functions of the vehicle gas supply system are not reduced, but the structure is simplified. In particular, compared with the original cylinder valve 2, the improved cylinder valve device has a simpler structure and fewer components, which not only simplifies the operation and control system, but also reduces costs.

[0032] Specifically, see Appendix Figure 3 The improved vehicle-mounted air supply system includes an air storage cylinder 1, a pressure reducing valve 4, and a combined control valve 5.

[0033] The number of gas cylinders 1 can be selected as needed. To demonstrate the application value of this solution, at least two are required, specifically two, three, four, or more. Gas cylinders 1 are used to store fuel gas. Different fuel gases require different structural features or materials for gas cylinders 1, but these are irrelevant to the implementation of this solution and will not be elaborated upon. Each gas cylinder 1 is equipped with a cylinder opening / closing valve 24, which independently controls the gas supply to that cylinder. Under normal use, all cylinder opening / closing valves 24 are open. If some gas cylinders 1 malfunction, the corresponding cylinder opening / closing valve 24 can be closed, thus not affecting the normal use of other gas cylinders 1. The cylinder opening / closing valves 24 can also be opened or closed as needed for maintenance. The cylinder opening / closing valves 24 are crucial valve devices for isolating different gas cylinders 1, and are of great significance for ensuring the reliability and safety of this vehicle-mounted gas supply system.

[0034] Temperature-driven safety relief devices are commonly used safety components in gas storage systems. They automatically control the opening and closing of the gas path based on ambient temperature. Under normal circumstances, the gas path is closed. However, when the ambient temperature exceeds a set safety threshold, the device automatically opens the gas path, allowing fuel gas to escape promptly and preventing excessive pressure buildup within the storage device, which could lead to a safety accident. The specific structure of the temperature-driven safety relief device is existing technology and will not be described in detail here.

[0035] In this scheme, a temperature-driven safety relief device can be configured separately for each gas storage cylinder 1, or a temperature-driven safety relief device that can be used to relieve pressure on all gas storage cylinders 1 can be configured only at the combined control valve 5, or a temperature-driven safety relief device can be configured at the combined control valve 5 in addition to configuring a temperature-driven safety relief device separately for each gas storage cylinder 1.

[0036] Specifically, each gas cylinder 1 is equipped with a temperature-driven safety relief device at the cylinder end (6). To enable this device to function, a cylinder end relief channel (7) is also required. This channel is an independent passage connected directly to the gas cylinder 1. This channel can be a passage within a valve assembly or a passage formed by pipes. A single gas cylinder 1 can have one cylinder end temperature-driven safety relief device (6) at the cylinder opening or tail, or it can have two separate cylinder end temperature-driven safety relief devices (6) at the cylinder opening and tail.

[0037] The pressure relief channel 7 and the temperature-driven safety relief device 6 located at the bottle neck can be integrated with the bottle neck opening / closing valve 24 to form a main valve installed at the bottle neck of each gas storage cylinder 1. The valve body of the main valve is installed at the bottle neck, and the main valve has a main channel communicating with the bottle neck. The main channel connects to two branch channels, one of which is equipped with the bottle neck opening / closing valve 24, and the other branch channel is equipped with the bottle neck temperature-driven safety relief device 6. The branch channel equipped with the bottle neck opening / closing valve 24 is used to supply fuel gas and is connected to the combined control valve 5. A temperature sensor 8 can also be integrated into the main valve. The probe of the temperature sensor 8 can be inserted into the gas storage cylinder 1 to detect the temperature inside the gas storage cylinder 1 in real time, providing a basis for determining the status of the gas storage cylinder 1.

[0038] See appendix Figure 4 Appendix Figure 5 and appendix Figure 6The combined control valve 5 integrates multiple components, which can be connected via pipes or mounted on a physical structure and connected by channels within that structure. The former offers greater flexibility, allowing for easy repositioning of the components; the latter provides a higher degree of integration, enabling it to be manufactured and used as an independent product, occupying less space, and offering higher reliability.

[0039] The combined control valve 5 has a main channel 511 and branch channels connected to the main channel 511. There is at least one branch channel, and the number of branch channels can be determined as needed in different embodiments. The main channel 511 and the branch channels can be pipes or channels within a solid structure. In a preferred embodiment, the aforementioned solid structure refers to a mounting base 51. The mounting base 51 has channels formed into the main channel 511 and the branch channels through integral molding or machining. Simultaneously, the outer surface of the mounting base 51 also has mounting holes formed to connect to the main channel 511 or the branch channels. These mounting holes are used to install the various components constituting the combined control valve 5.

[0040] The combined control valve 5 includes a solenoid valve 52 and a flow-limiting valve 53 sequentially arranged along the gas flow direction on the main channel 511. The gas flow direction specifically refers to the airflow direction of each gas cylinder 1 during the supply of fuel gas to the vehicle's internal combustion engine. The upstream end 512 of the main channel 511 in the flow direction is the upstream end, and the downstream end 513 is the downstream end. The downstream end 513 is the interface A for connecting to the pressure reducing valve 4. The mounting base 51 has two mounting holes for installing the solenoid valve 52 and the flow-limiting valve 53, allowing them to be installed from outside the base for convenient assembly. The solenoid valve 52 can be electrically controlled to control the on / off state of the main channel 511, determining whether the entire vehicle gas supply system supplies fuel gas to the internal combustion engine; the flow-limiting valve 53 is used to stabilize the fuel gas supply flow rate within a set range. Compared to the original solution, this solution allows for centralized control of the on / off state and flow rate of fuel gas, making control easier and eliminating error accumulation in flow control, resulting in more accurate control.

[0041] One of the branch channels is the refueling branch channel 514, located upstream of the solenoid valve 52. The end of the refueling branch channel 514 is an interface B, used to connect to the vehicle's refueling port 10 via a pipe. The refueling branch channel 514 is equipped with a one-way valve 54 that allows fuel gas to flow unidirectionally into the main channel 511. The vehicle's refueling port 10 is generally equipped with a one-way valve 54 and a filter 55. The fuel gas added to the vehicle enters the refueling branch channel 514 through the refueling port 10, and then enters the main channel 511. During refueling, the solenoid valve 52 is closed, allowing the fuel gas to flow counter-currently within the main channel 511 and into each gas storage cylinder 1. After the vehicle's internal combustion engine starts, the fuel gas enters the main channel 511 from the upstream end 512, flows forward through the refueling branch channel 514, the solenoid valve 52, and the flow restrictor valve 53, and finally exits from the downstream end 513 of the main channel 511 through the combined control valve 5.

[0042] In some embodiments, the combined control valve 5 may only include the above-mentioned structure. In this case, a manual release valve 56 needs to be configured at the main valve of each gas cylinder 1 to facilitate manual release operation. Even so, compared with the prior art, the main valve (corresponding to the cylinder valve 2 in the original scheme) structure is still simpler, with fewer components, thus reducing the cost of the vehicle-mounted gas supply system.

[0043] In some other embodiments, the manual relief valve 56 can be integrated into the combined control valve 5, thus eliminating the need for a separate manual relief valve 56 at the main valve and further simplifying the main valve's structure. Specifically, this solution also requires a branch channel for the manual relief valve 56, which is a manual relief channel 515. The inlet of the manual relief channel 515 is connected to the section of the main channel 511 upstream of the solenoid valve 52, and the outlet of the manual relief channel 515 is connected to the section of the main channel 511 downstream of the flow restrictor valve 53. The mounting base 51 of the combined control valve 5 is provided with a mounting hole for the manual relief valve 56, which communicates with the manual relief channel 515. The combined control valve 5 can be inserted from outside the mounting base 51 into the mounting hole and enter the manual relief channel 515. The inlet of the manual release channel 515 can be located between the solenoid valve 52 and the gas filling branch channel 514. In this case, a filter 55 can be installed on the main channel 511 between the manual release channel 515 and the gas filling branch channel 514. The filter 55 can filter the fuel gas entering the solenoid valve 52 and the manual release valve 56. Moreover, there is no backflow of fuel gas at the location where the filter 55 is installed, so the filtration effect is better. Alternatively, the inlet of the manual release channel 515 can be located upstream of the gas filling branch channel 514. In this case, filters 55 need to be installed on the main channel 511 between the solenoid valve 52 and the gas filling branch channel 514, and on the manual release channel 515 upstream of the manual release valve 56.

[0044] In a further embodiment, a temperature-driven safety relief device can be configured for the combined control valve 5. This temperature-driven safety relief device in the combined control valve 5 is a main temperature-driven pressure relief device 57, used to automatically relieve pressure on all gas cylinders 1. Specifically, the mounting base 51 is equipped with a branch channel and a mounting hole for the main temperature-driven safety relief device. This branch channel is an automatic pressure relief channel 516, adjacent to the upstream end 512 of the main channel 511. "Adjacent" here means that they are directly connected without any other components separating them, not that they are close in distance. The end of the automatic pressure relief channel 516 is an interface D, used to connect to the venting pipeline. In the event of an abnormally high ambient temperature, the cylinder-end temperature-driven pressure relief devices can be opened individually, providing an independent pressure relief channel for each gas cylinder 1, resulting in high pressure relief efficiency. Simultaneously, the main temperature-driven pressure relief device 57 can also be opened, providing additional pressure relief channels for each gas cylinder 1, further improving pressure relief efficiency.

[0045] In a further embodiment, a shut-off valve 58 for controlling the opening and closing of the main channel 511 can be installed on the main channel 511. The shut-off valve 58 is located upstream of the gas refueling branch channel 514 and downstream of the automatic pressure relief channel. The mounting hole on the mounting base 51 for the shut-off valve 58 communicates with the main channel 511. The shut-off valve 58 can be a manual valve device or an electromagnetically controlled automatic valve device. The shut-off valve 58 is designed to increase the means of cutting off and regulating flow, thereby enhancing the reliability of the vehicle-mounted gas supply system.

[0046] Each gas cylinder 1 is equipped with a gas supply channel, which converges and connects to the upstream end 512 of the main channel 511. In some embodiments, the gas supply channel may consist only of a gas supply pipe 9, one end of which is connected to the corresponding gas cylinder 1, and the other end is connected to a manifold. The manifold is then connected to the main channel 511 in the mounting base 51. During use, the fuel gas in each gas cylinder 1 first enters the manifold through its respective gas supply pipe 9. The fuel gas then converges in the manifold and enters the main channel 511. In this design, the upstream end 512 of the main channel 511 extends directly through the surface of the mounting base 51, and the number of interfaces on the mounting base 51 for connecting to pipes is relatively small.

[0047] In other embodiments, the gas supply channel includes a gas supply pipe 9 and a manifold 517 disposed within the mounting base 51. The number of gas supply pipes 9 and the number of manifolds 517 correspond to the number of gas storage tanks. One end of the gas supply pipe 9 is connected to the corresponding gas storage tank, and the other end is connected to the corresponding manifold 517. The interfaces of the manifolds 517 for connecting to the gas supply pipe 9 are interface C1, interface C2, interface C3, and interface C4, respectively. The fuel gas in the gas storage tank enters the corresponding manifold 517 through the gas supply pipe 9. Different manifolds 517 are interconnected to merge the fuel gas in different gas storage tanks. The manifolds 517 are connected to the upstream end 512 of the main channel 511. The merged fuel gas enters the main channel 511, or the merging is completed at the same time as entering the upstream end 512 of the main channel 511. The aforementioned manifold 517 is connected to the upstream end 512 of the main channel 511. This connection can be direct or indirect, first connecting to other manifolds 517 and then indirectly connecting to the main channel 511 via those other manifolds 517. In manifolds 517 directly connected to the main channel 511, the fuel gas enters the main channel 511 while simultaneously merging with other fuel gases. In manifolds 517 indirectly connected to the main channel 511, the fuel gas first merges with fuel gases in other manifolds 517 before entering the main channel 511. In this design, the opening of each manifold 517 on the surface of the mounting base 51 serves as an interface for connecting to the gas supply pipe 9. While the number of interfaces is relatively large, it simplifies the layout of the gas supply pipe 9, facilitates pipe connection operations, and reduces the failure rate of the gas supply pipe 9.

[0048] In a preferred embodiment, the mounting base 51 of the combined control valve 5 is generally rectangular block structure. A stepped structure 518 is provided on one side of the rectangular block. The lowest step is used to install a larger solenoid valve 52, the second step is used to install a medium valve, and the highest step is used to install a main control temperature drive safety pressure relief device. The three steps are respectively provided with mounting holes for installing corresponding devices. These devices are set on the stepped structure 518, and the steps can be used to accommodate the length of different devices, making the overall structure more compact.

[0049] Based on the arrangement of these three components, the main channel 511 extends from the highest step to the lowest step, and makes turns according to the direction of the steps. The inlet and outlet of the shut-off valve 58 and the solenoid valve 52 are located at the turns of the main channel 511. Taking the arrangement direction of the steps as horizontal and the height direction of the steps as vertical, the main channel 511 has sections of horizontal extension-vertical extension-horizontal extension-vertical extension according to the direction of the steps. There are two turns between the first vertical extension section and the two adjacent horizontal extension sections. The upper turn corresponds to the mounting hole of the shut-off valve 58, and the lower turn corresponds to the gas filling branch channel 514. The gas filling branch channel 514 extends vertically downward from the mounting base 51. The direction on the mounting base 51 that is perpendicular to both the horizontal and vertical directions is the front-back direction. The gas filling branch channel 514 first extends vertically downward, and then extends forward to the front surface of the mounting base 51, forming an interface B for connecting with the vehicle's gas filling port 10 through a pipe. This arrangement facilitates installation and operation. The lower end of the second vertical extension section of the main channel 511 also extends forward, so that the downstream end 513 of the main channel 511 forms interface A on the front side of the mounting base 51, which also facilitates installation and operation. A boss 5110 is provided on the front side of the mounting base 51. The interface of the gas filling branch channel 514 and the interface of the downstream end 513 of the main channel 511 are both located on this boss 5110. The boss 5110 provides a large space to facilitate the processing of a structure suitable for connecting pipes at the above two interfaces. The automatic pressure relief channel extends upward from the upstream end 512 of the main channel 511 and extends forward to the front side of the mounting base 51 at the total control temperature driven safety pressure relief device, forming interface D.

[0050] A mounting hole for installing a manual release valve 56 is provided on the mounting base 51 on the opposite side of the stepped structure 518. A manual release channel 515 for installing the manual release valve 56, communicating with this mounting hole, includes two sections: a vertical section and a horizontal section. The manual release valve 56 is located at the junction of the two sections. The two sections are respectively connected to the second horizontal extension section and the second vertical extension section of the main channel 511. A mounting hole for installing a filter 55 is provided on the front side of the mounting base 51. This mounting hole is a filter mounting hole 519, communicating with the second horizontal extension section of the main channel 511. The filter 55 is installed upstream of the connection between the vertical section of the manual release channel 515 and the second horizontal extension section of the main channel 511.

[0051] In a preferred embodiment, there are four gas storage cylinders 1, and four manifolds 517 are correspondingly provided on the mounting base 51. The four manifolds 517 form four interfaces on the surface of the mounting base 51, namely interface C1, interface C2, interface C3, and interface C4. Two manifolds 517 are located on the front side of the mounting base 51 and are arranged vertically, while the other two manifolds 517 are located on one side of the mounting base 51, corresponding horizontally to the upstream end 512 of the main channel 511, and are also arranged vertically. Among all the manifolds 517, the lowest manifold 517 extends vertically upward and communicates with the upstream end 512 of the main channel 511, and the other manifolds 517 communicate with this manifold 517.

[0052] Specific embodiments of the combined control valve provided by this invention: The structure of this combined control valve is the same as that of the combined control valve in the above embodiment, and will not be described again.

[0053] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vehicle-mounted air supply system, characterized in that, It includes at least two gas cylinders for storing fuel gas, each equipped with an opening and closing valve for independently controlling the gas supply; it also includes a combined control valve, which has a main channel and at least one branch channel connected to the main channel. The combined control valve includes a solenoid valve and a flow restrictor valve arranged sequentially along the gas flow direction on the main channel. One of the branch channels located upstream of the solenoid valve is a refueling branch channel, which is used to connect to the vehicle's refueling port. The refueling branch channel is equipped with a one-way valve that allows fuel gas to flow unidirectionally into the main channel; each gas cylinder is equipped with a gas supply channel, and the gas supply channels converge and connect to the upstream end of the main channel.

2. The vehicle-mounted air supply system according to claim 1, characterized in that, One of the branch channels located upstream of the solenoid valve is the automatic pressure relief channel. The automatic pressure relief channel is located adjacent to the upstream end of the main channel. The automatic pressure relief channel is equipped with a total control temperature-driven safety pressure relief device. The end of the automatic pressure relief channel is a vent for releasing fuel gas.

3. The vehicle-mounted air supply system according to claim 1 or 2, characterized in that, A shut-off valve for controlling the opening and closing of the main channel is installed on the main channel, and the shut-off valve is located upstream of the gas refueling branch channel.

4. The vehicle-mounted air supply system according to claim 1 or 2, characterized in that, One of the branch channels is a manual relief channel. The inlet of the manual relief channel is connected to the section of the main channel upstream of the solenoid valve, and the outlet of the manual relief channel is connected to the section of the main channel downstream of the flow restrictor valve. A manual relief valve is installed on the manual relief channel.

5. A combination control valve, characterized in that it is used for A gas fuel cell vehicle has a main channel and at least one branch channel connected to the main channel. The combined control valve includes a solenoid valve and a flow restrictor valve arranged sequentially along the gas flow direction on the main channel. One of the branch channels located upstream of the solenoid valve is a refueling branch channel, which is used to connect to the vehicle's refueling port. A one-way valve is provided on the refueling branch channel to allow fuel gas to flow unidirectionally into the main channel.

6. The combined control valve according to claim 5, characterized in that, One of the branch channels located upstream of the solenoid valve is the automatic pressure relief channel. The automatic pressure relief channel is located adjacent to the upstream end of the main channel. The automatic pressure relief channel is equipped with a first temperature-driven safety pressure relief device. The end of the automatic pressure relief channel is a vent for releasing fuel gas.

7. The combined control valve according to claim 5 or 6, characterized in that, A shut-off valve for controlling the opening and closing of the main channel is installed on the main channel, and the shut-off valve is located upstream of the gas refueling branch channel.

8. The combined control valve according to claim 5 or 6, characterized in that, One of the branch channels is a manual relief channel. The inlet of the manual relief channel is connected to the section of the main channel upstream of the solenoid valve, and the outlet of the manual relief channel is connected to the section of the main channel downstream of the flow restrictor valve. A manual relief valve is installed on the manual relief channel.

9. The combined control valve according to claim 5 or 6, characterized in that, The combined control valve includes a mounting base, a main channel and a branch channel which are respectively formed in the interior of the mounting base, and a mounting hole formed on the outer side of the mounting base to communicate with the main channel or the branch channel. The mounting hole is used to install the components that constitute the combined control valve.

10. The combined control valve according to claim 9, characterized in that, The outer surface of the mounting base is formed with at least two converging holes that connect to the upstream end of the main channel. The openings of the converging holes are used to connect to the gas supply pipes of the gas storage cylinders. The converging holes are used to allow the fuel gas supplied by each gas storage cylinder to converge and flow into the upstream end of the main channel.

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