Intrinsic safety linkage differential pressure type fuel filling method and fuel filling system

Abstract

This invention relates to an intrinsically safe differential pressure fuel refueling method and system. The fuel refueling method includes the following steps: Step (I) A remote system platform issues a refueling task to a tanker truck with a pump, and the tanker truck arrives at the designated refueling location; Step (II) An operator connects the refueling pipeline between the refueling tank and the fuel storage tank, and the operator inputs a refueling command to start refueling; Step (III) The refueling tank delivers liquid fuel to the electric vaporizer and the differential pressure tank respectively. The electric vaporizer heats the liquid fuel, vaporizing it into gaseous fuel, which is then delivered to the differential pressure tank. The pressure inside the differential pressure tank increases, and the differential pressure forces the liquid fuel inside the differential pressure tank towards the fuel storage tank, thus achieving refueling; Step (IV) When the required refueling volume is reached, the refueling task is completed. This method effectively avoids the phenomenon of rapid fuel heating due to pump idling, eliminates safety hazards, and ensures safe fuel refueling.

Description

Technical Field

[0001] This invention relates to a fuel supply system, specifically an intrinsically safe differential pressure fuel refueling method. Background Technology

[0002] In existing fuel supply systems, tank trucks typically use unloading pumps to refuel. When the liquid level in the tank is low or zero, existing refueling methods often cause the tank truck with the unloading pump to continue running the mechanical unloading pump for refueling, or the mechanical unloading pump may not be shut off in time after the liquid level reaches zero, causing the idling mechanical pump to heat up rapidly, creating a significant safety hazard.

[0003] Therefore, further improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an inherently safe differential pressure refueling method. This method can effectively avoid the phenomenon of rapid fuel heating caused by pump idling, eliminate safety hazards, and ensure fuel refueling safety.

[0005] The objective of this invention is achieved as follows:

[0006] An intrinsically safe differential pressure fuel refueling method includes the following steps:

[0007] Step (1): The remote system platform issues a refueling task to the tanker truck with pump, and the tanker truck with pump arrives at the designated refueling location according to the refueling task;

[0008] Step (two): The operator connects the filling pipeline between the filling tank and the fuel storage tank on the pump-equipped tanker truck, and then inputs the filling command through the vehicle controller to start filling.

[0009] Step (3): After the pump tanker truck starts refueling, the refueling tank delivers liquid fuel to the electric vaporizer and the differential pressure tank respectively. The electric vaporizer heats the liquid fuel and vaporizes it into gaseous fuel, which is then delivered to the differential pressure tank. The pressure inside the differential pressure tank increases, and the pressure difference forces the liquid fuel in the differential pressure tank to be forced into the fuel storage tank, thus realizing fuel refueling.

[0010] Step (four): The flow meter monitors the flow rate of the liquid fuel that is expelled from the differential pressure tank by heating and pressure difference in real time. When the flow rate reaches the required amount for the refueling task, the vehicle controller controls the electric vaporizer to stop heating the liquid fuel and closes the refueling solenoid valve at the liquid outlet of the differential pressure tank, thus completing the refueling task.

[0011] As a specific solution, in step (1), after the pump truck arrives at the designated location, the near-field communication device on the pump truck connects with the transmission device on the fuel storage tank. The remote system platform performs electronic fence matching based on the positioning location of the pump truck and the fuel storage tank. When the pump truck and the fuel storage tank are both within the electronic fence, the remote system platform recognizes that the near-field communication matching is successful and allows the refueling operation to proceed.

[0012] As another specific solution, in step (two), the remote system platform pushes the vehicle opening code and the storage tank opening code to the operator respectively. The operator opens the vehicle control box on the pump tanker truck using the vehicle opening code and takes out the refueling gun and return air gun from the vehicle control box. The operator opens the storage tank control box on the fuel storage tank using the storage tank opening code, exposing the filling valve and balance valve in the storage tank control box. The operator connects the refueling gun to the filling valve and the return air gun to the balance valve, thus connecting the refueling tank to the fuel storage tank.

[0013] As another specific solution, when the pressure inside the filling tank is greater than the pressure inside the fuel storage tank, the existing pressure difference can be used directly for filling, without needing to turn on the electric vaporizer, and the return gas gun and balance valve do not need to be connected.

[0014] As another specific solution, when the pressure inside the differential pressure tank is higher than the first set pressure, the vehicle controller controls the electric heating vaporizer to cut off the power; the range of the first set pressure is 0.36-1.0MPa.

[0015] As another specific solution, when the pressure inside the filling tank is higher than the second set pressure, the vehicle controller controls the electric heating vaporizer to cut off the power; the range of the second set pressure is 1.0-2.45MPa.

[0016] As another specific solution, during the refueling process, the gaseous fuel vaporized in the differential pressure tank is returned to the refueling tank; when the temperature inside the refueling tank exceeds the set temperature, the vehicle controller disconnects the power supply to the electric vaporizer and starts the spray device to spray and cool the refueling tank; the set temperature range is 50℃-60℃.

[0017] A fuel refueling system using the above-described fuel refueling method includes a tanker truck with a pump and a gas supply unit;

[0018] The pump-equipped tanker is equipped with a refueling tank, an electric vaporizer, and a differential pressure tank; the refueling tank is connected to the differential pressure tank via a first pre-pipeline, and the electric vaporizer is mounted on the first pre-pipeline; the refueling tank is connected to the differential pressure tank via a second pre-pipeline.

[0019] The gas supply unit includes a fuel storage tank connected to the gas-consuming terminal;

[0020] At least in the refueling state, the differential pressure tank is connected to the fuel storage tank via a refueling pipeline.

[0021] As another specific embodiment, the pump-equipped tanker also includes a vehicle controller, the vehicle controller being circuitically connected to a first sensor group for monitoring one or more data points of the refueling tank and a second sensor group for monitoring one or more data points of the differential pressure tank; the gas supply unit also includes a gas supply controller, the gas supply controller being circuitically connected to a third sensor group for monitoring one or more data points of the fuel storage tank.

[0022] As another specific embodiment, the capacity of the refueling tank is V1, and the capacity of the fuel storage tank is V2, wherein V1 ≥ 3 × V2.

[0023] The beneficial effects of this invention are as follows:

[0024] This invention provides a safe and reliable intrinsically safe differential pressure refueling method with inherent safety protection, intelligent linkage control, and no need for mechanical pumps. The entire process complies with remote monitoring, system authorization, one-to-one directional identification, intrinsically safe management, and information-based linkage. The differential pressure refueling method avoids the safety hazards caused by rapid fuel temperature rise due to mechanical pump idling when there is no fuel. Under information-based conditions, the intrinsically safe differential pressure refueling method of this invention fully utilizes automatic control technology and effectively avoids the defects of mechanical pump refueling of flammable and explosive gases.

[0025] The advantages of using electrothermal differential pressure for fuel refueling are: the control and response speed of the electrothermal vaporizer is fast; the heating wire in the electrothermal vaporizer has a low specific heat capacity, so it will not continue to heat the liquid fuel due to the large amount of residual heat retained by the heating wire after power failure; and the refueling tank 11 can be quickly cooled by spray devices, etc.; it can be seen that compared with the traditional water bath heating method, the electrothermal vaporizer heating method in this method does not have a large amount of residual heat, and the response speed is fast, enabling real-time control; in addition, this fuel refueling method can also be used for triple self-protection such as information monitoring of liquid fuel supply, electrical control, and safety early warning, and can be used for remote satellite positioning, high pressure, low pressure, temperature, liquid level, gas leakage, and remote electronic pairing. All components in the fuel refueling system are developed in an integrated manner, with a reasonable structure and complete functions. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of an intrinsically safe differential pressure fuel refueling method according to an embodiment of the present invention.

[0027] Figure 2 This is a system architecture diagram of an embodiment of the present invention. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] See Figure 1 The intrinsically safe differential pressure refueling method involved in this embodiment includes the following steps:

[0030] Step (1): When the liquid level in the fuel storage tank 21 is lower than the set liquid level, the gas supply controller 210 sends a fuel refueling request to the remote system platform 300. The remote system platform 300 searches for nearby tank trucks with pumps 100 based on the grid block where the fuel storage tank 21 that sent the fuel refueling request is located. The remote system platform 300 issues a refueling task to the tank truck with pumps 100. The driver (the operator 400 who performs the refueling task can be the driver or an accompanying person) drives the tank truck with pumps 100 to the designated refueling location (near the fuel storage tank 21) according to the refueling task.

[0031] Step (2): Operator 400 connects the filling pipeline between the filling tank 11 on the pump-equipped tanker truck 100 and the fuel storage tank 21, so that the filling tank 11 is connected to the fuel storage tank 21. Operator 400 inputs the filling command through the vehicle controller 121 to start filling.

[0032] Step (3): After the pump-equipped tanker truck 100 starts refueling, the refueling tank 11 delivers liquid fuel to the electric vaporizer 17 and the differential pressure tank 18 respectively. The electric vaporizer 17 heats the liquid fuel to vaporize it into gaseous fuel, which is then delivered to the differential pressure tank 18. The pressure inside the differential pressure tank 18 increases (the pressure is generally between 0 and 0.35 MPa). The pressure difference causes the liquid fuel in the differential pressure tank 18 to be forced towards the fuel storage tank 21, thus realizing fuel refueling. In this embodiment, the liquid fuel is liquefied petroleum gas (LPG), and the gaseous fuel is gaseous LPG.

[0033] Step (four): The flow meter 110 at the liquid outlet of the differential pressure tank 18 monitors the flow rate data of the liquid fuel that is expelled from the differential pressure tank 18 by heating the differential pressure in real time; when the flow rate data reaches the refueling amount required by the refueling task, the vehicle controller 121 determines that the refueling is completed and controls the electric vaporizer 17 to stop heating the liquid fuel, and closes the refueling solenoid valve 19 at the liquid outlet of the differential pressure tank 18, and the refueling task is completed.

[0034] Further, in step (1), after the pump tanker 100 arrives at the designated location, the near-field communication device on the pump tanker 100 establishes a signal connection with the transmission device on the fuel storage tank 21. The remote system platform 300 performs electronic fence matching based on the positioning location of the pump tanker 100 (preferably Beidou positioning) and the positioning location of the fuel storage tank 21 (preferably Beidou positioning). When the pump tanker 100 and the fuel storage tank 21 are both within the electronic fence, the remote system platform 300 recognizes that the near-field communication matching is successful and allows the refueling operation to proceed.

[0035] Further, in step (ii), the remote system platform 300 pushes the vehicle opening code and the storage tank opening code to the operator 400 respectively (specifically, each code is pushed to the control terminal on the operator 400, the control terminal including smartphones, laptops, tablets and other networked products). The operator 400 opens the vehicle control box 126 on the pump tanker truck 100 using the vehicle opening code, and takes out the refueling gun 111 and the return air gun 125 from the vehicle control box 126. The operator 400 opens the storage tank control box 22 on the fuel storage tank 21 using the storage tank opening code, exposing the filling valve 23 and the balance valve 24 in the storage tank control box 22. The operator 400 connects the refueling gun 111 to the filling valve 23 and the return air gun 125 to the balance valve 24, connecting the refueling tank 11 to the fuel storage tank 21. The remote system platform determines whether the docking between the filling gun 111 and the filling valve 23, and the docking between the return air gun 125 and the balance valve 24 are successful and leak-free based on the pressure data of the filling tank and the fuel storage tank. After confirming safety, the vehicle controller 121 allows the filling mode. If the vehicle controller 121 does not allow the filling mode, the operator 400 reconnects the relevant components according to the prompts of the vehicle controller 121 until the filling mode is allowed.

[0036] Furthermore, when the pressure inside the filling tank 11 is greater than the pressure inside the fuel storage tank 21, the existing pressure difference is used directly for filling, without needing to turn on the electric vaporizer 17, and the return gas gun 125 and the balance valve 24 do not need to be connected.

[0037] Furthermore, when the pressure inside the differential pressure tank 18 is higher than the first set pressure, the vehicle controller 121 controls the electric vaporizer 17 to cut off the power to avoid excessive pressure and potential safety hazards; the first set pressure is 0.4 MPa.

[0038] Furthermore, when the pressure inside the filling tank 11 is higher than the second set pressure, the vehicle controller 121 controls the electric heating vaporizer 17 to be de-energized; the second set pressure is 1.6 MPa.

[0039] Furthermore, the electric vaporizer 17 heats the liquid fuel to vaporize it. The vaporized fuel is then returned to the refueling tank 11 through a corresponding pipeline, thereby increasing the pressure inside the refueling tank 11. The vehicle controller 121 monitors the pressure difference tank 18 in real time to ensure that the pressure does not exceed 0.4 MPa and the pressure inside the refueling tank 11 does not exceed 1.6 MPa. Otherwise, the intrinsic safety protection is immediately activated, and the electric vaporizer 17 is de-energized.

[0040] Furthermore, during the refueling process, the differential pressure tank 18 is connected to the refueling tank 11 via a gas circuit, and the gaseous fuel vaporized in the differential pressure tank 18 is returned to the refueling tank 11. When the internal temperature of the refueling tank 11 exceeds the set temperature, the vehicle controller 121 automatically activates the intrinsic safety protection, thereby disconnecting the power supply to the electric vaporizer 17 and activating the spray device to spray and cool the refueling tank 11. The set temperature is 50°C.

[0041] The fuel refueling system involved in this embodiment includes a tanker truck 100 with a pump and a gas supply unit 200;

[0042] The pump-equipped tanker 100 is equipped with a filling tank 11, an electric vaporizer 17, and a differential pressure tank 18; the filling tank 11 is connected to the differential pressure tank 18 through a first pre-pipeline, and the electric vaporizer 17 is installed on the first pre-pipeline; the filling tank 11 is connected to the differential pressure tank 18 through a second pre-pipeline.

[0043] The gas supply unit 200 includes a fuel storage tank 21 connected to a gas-consuming terminal;

[0044] At least in the refueling state, the differential pressure tank 18 is connected to the fuel storage tank 21 via a refueling pipeline.

[0045] Furthermore, the pump-equipped tanker 100 also includes a vehicle controller 121, which is circuitically connected to a first sensor group for monitoring one or more data of the refueling tank 11 and a second sensor group for monitoring one or more data of the differential pressure tank 18; the gas supply unit 200 also includes a gas supply controller, which is circuitically connected to a third sensor group for monitoring one or more data of the fuel storage tank 21.

[0046] Furthermore,

[0047] The first sensor group includes a first pressure sensor 114 for monitoring high pressure data of the refueling tank 11, a first liquid level sensor 115 for monitoring liquid level data of the refueling tank 11, a first temperature sensor 116 for monitoring temperature data of the refueling tank 11, and a first gas sensor 117 for monitoring the concentration of gaseous fuel around the refueling tank 11; each of the above sensors is respectively installed on the refueling tank 11.

[0048] The second sensor group includes a second pressure sensor 118 for monitoring pressure data of the differential pressure tank 18, a second liquid level sensor 119 for monitoring liquid level data of the differential pressure tank 18, and a second temperature sensor 120 for monitoring temperature data of the differential pressure tank 18; each of the above sensors is respectively installed on the differential pressure tank 18.

[0049] The third sensor group includes a third pressure sensor 25 for monitoring high pressure data of fuel storage tank 21, a third liquid level sensor 26 for monitoring liquid level data of fuel storage tank 21, a third temperature sensor 27 for monitoring temperature data of fuel storage tank 21, and a third gas sensor 28 for monitoring the concentration of gaseous fuel around fuel storage tank 21; each of the above sensors is respectively installed on fuel storage tank 21; the gas supply unit also includes a camera module 29 for collecting real-time video data of the environment around fuel storage tank 21, and the gas supply controller 210 is electrically connected to the camera module 29;

[0050] The vehicle controller 121 monitors the data collected by various sensors on the refueling tank 11 in real time and uploads high-pressure data, temperature data, liquid level data, etc. to the remote system platform 300 in real time, so that the remote system platform 300 can monitor the real-time data of the refueling tank 11; the gas supply controller 210 monitors the data collected by various sensors on the fuel storage tank 21 in real time and uploads high-pressure data, temperature data, liquid level data, etc. to the remote system platform 300 in real time, so that the remote system platform 300 can monitor the real-time data of the fuel storage tank 21; the vehicle controller 121 collects liquid level data, pressure data, temperature data, etc. from the refueling tank 11 and the differential pressure tank 18 through its built-in computing chip, forming an artificial intelligence decision-making mechanism.

[0051] When the remote system platform 300 collects real-time data from the refueling tank 11 and the fuel storage tank 21, the remote system platform 300 automatically determines whether the refueling tank 11 and the fuel storage tank 21 are functioning normally; the remote system platform 300 then automatically decides whether the refueling requirements are met based on the following conditions:

[0052] a. The pressure inside the refueling tank 11 is greater than the pressure in the fuel storage tank 21 but not greater than 0.35 MPa;

[0053] b. The unloadable volume of liquid fuel gas in the filling tank 11 is greater than the volume required for the fuel storage tank 21 to complete filling.

[0054] Specifically, the vehicle controller 121 calculates the unloadable liquid volume V of the filling tank 11 based on the real-time liquid level H1 of the filling tank 11. 卸 Simultaneously, the gas supply controller 210 calculates the remaining liquid fuel volume V in the fuel storage tank 21 based on the real-time liquid level H2. 剩 and the volume of liquid fuel V required to fill fuel storage tank 21 满 ;

[0055] c. The temperature data of the filling tank 11 and the fuel storage tank 21 are within the normal temperature range of -20℃ to 50℃, and the temperature of the heat medium in the electric vaporizer 17 does not exceed 70℃.

[0056] d. Neither the gas sensors on the refueling tank 11 nor the fuel storage tank 21 detected any gaseous fuel leakage;

[0057] e. All pipe connections are normal, and system signals are normal.

[0058] Under normal conditions, the remote system platform 300 controls each unit to perform liquid filling operations, and the gas supply controller 210 automatically monitors the process via video through the camera module 29.

[0059] Furthermore, the capacity of the refueling tank 11 is V1, and the capacity of the fuel storage tank 21 is V2, where V1 ≥ 3 × V2. In this embodiment, the capacity V1 of the refueling tank 11 is 15 cubic meters, so the capacity V2 of the fuel storage tank 21 cannot exceed 5 cubic meters to avoid excessive pressure caused by the fuel storage tank 21 filling the refueling tank 11. At the same time, the remote system platform identifies the one-to-one matching refueling object to ensure that the fuel storage tank 21 can only be filled from the refueling tank 11.

[0060] Furthermore, a first solenoid valve 12 is provided at the liquid outlet end of the filling tank 11. A first check valve 13, a first safety valve 14, and a second solenoid valve 15 are provided on the pipeline between the first solenoid valve 12 and the electric vaporizer 17. A second safety valve 16 is provided on the electric vaporizer 17. A second check valve 112 is provided on the pipeline between the first solenoid valve 12 and the differential pressure tank 18. A third solenoid valve 113 is provided on the pipeline between the return air gun 125 and the filling tank 11.

[0061] Furthermore, the pump tanker 100 is equipped with a vehicle positioning module 122 to provide real-time feedback of the pump tanker 100's BeiDou positioning to the remote system platform 300; the fuel storage tank 21 is equipped with a storage tank positioning module 211 to provide feedback of the fuel storage tank 21's BeiDou positioning to the remote system platform 300.

[0062] Furthermore, the spraying device on the pump-equipped tanker 100 includes a water tank 123, a spray pipe 124, and a spray pump body (not shown in the figure). The spray pipe 124 is connected to the water tank 123, and the spray pump body is electrically connected to the vehicle controller 121 and installed on the spray pipe 124. The spraying direction of the spray pipe 124 is towards the filling tank 11. When the spraying device is started, the spray pipe 124 sprays water onto the filling tank 11 to achieve a cooling effect.

[0063] Further, see Figure 2 The cloud server 500 communicates with one or more remote system platforms 300, and the remote system platforms 300 communicate with one or more pump tank trucks 100 and one or more gas supply units 200 in the same grid block 600.

[0064] The above describes the preferred embodiments of the present invention, illustrating and describing the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fuel dispensing system, characterized in that: Includes a pump tanker truck (100) and a gas supply unit (200). The pump-equipped tanker (100) is equipped with a filling tank (11), an electric vaporizer (17), and a differential pressure tank (18); the filling tank (11) is connected to the differential pressure tank (18) through a first pre-pipeline, and the electric vaporizer (17) is installed on the first pre-pipeline; the filling tank (11) is connected to the differential pressure tank (18) through a second pre-pipeline. The gas supply unit (200) includes a fuel storage tank (21) connected to the gas consumption terminal; At least in the refueling state, the differential pressure tank (18) is connected to the fuel storage tank (21) via a refueling pipe. A first solenoid valve (12) is provided at the liquid outlet of the filling tank (11). A first check valve (13), a first safety valve (14) and a second solenoid valve (15) are provided on the pipeline between the first solenoid valve (12) and the electric vaporizer (17). A second safety valve (16) is provided on the electric vaporizer (17). A second check valve (112) is provided on the pipeline between the first solenoid valve (12) and the differential pressure tank (18). The intrinsically safe differential pressure fuel refueling method of this fuel refueling system includes the following steps: Step (1): The remote system platform (300) issues a refueling task to the pumped tanker (100), and the pumped tanker (100) arrives at the designated refueling location according to the refueling task; Step (2): The operator (400) connects the filling pipeline between the filling tank (11) on the pump tanker truck (100) and the fuel storage tank (21), so that the filling tank (11) and the fuel storage tank (21) are connected; the operator (400) inputs the filling command through the vehicle controller (121) to start filling; the differential pressure tank (18) is connected to the fuel storage tank (21) through the filling gun (111), the filling tank (11) is connected to the fuel storage tank (21) through the return air gun (125), the air circuit of the differential pressure tank (18) is connected to the filling tank (11), and a third solenoid valve (113) is installed on the pipeline between the return air gun (125) and the filling tank (11); Step (3): After the pump tanker (100) starts refueling, the refueling tank (11) delivers liquid fuel to the electric vaporizer (17) and the differential pressure tank (18) respectively. The electric vaporizer (17) heats the liquid fuel to vaporize it into gaseous fuel and then delivers it to the differential pressure tank (18). The pressure inside the differential pressure tank (18) increases, and the pressure difference causes the liquid fuel in the differential pressure tank (18) to be pressed towards the fuel storage tank (21), thus realizing fuel refueling. During the refueling process, the vaporized gaseous fuel in the differential pressure tank (18) is returned to the refueling tank (11). When the internal temperature of the refueling tank (11) exceeds the set temperature, the vehicle controller (121) disconnects the power supply to the electric vaporizer (17) and starts the spray device to spray and cool the refueling tank (11). Step (four), the flow meter (110) monitors the flow data of the liquid fuel that is expelled from the differential pressure tank (18) by heating differential pressure in real time; when the flow data reaches the refueling amount required by the refueling task, the vehicle controller (121) controls the electric vaporizer (17) to stop heating the liquid fuel and closes the refueling solenoid valve (19) at the liquid outlet of the differential pressure tank (18), and the refueling task is completed.

2. The fuel dispensing system according to claim 1, characterized in that: Step (1): After the pump tanker (100) arrives at the designated location, the near-field communication device on the pump tanker (100) connects with the transmission device on the fuel storage tank (21). The remote system platform (300) performs electronic fence matching based on the location of the pump tanker (100) and the location of the fuel storage tank (21). When the pump tanker (100) and the fuel storage tank (21) are both within the electronic fence, the remote system platform (300) recognizes that the near-field communication matching is successful and allows the refueling operation to proceed.

3. The fuel dispensing system according to claim 1, characterized in that: Step (2): The remote system platform (300) pushes the vehicle opening code and the storage tank opening code to the operator (400) respectively. The operator (400) opens the vehicle control box (126) on the pump tanker (100) using the vehicle opening code and takes out the filling gun (111) and the return air gun (125) from the vehicle control box (126). The operator (400) opens the storage tank control box (22) on the fuel storage tank (21) using the storage tank opening code, so that the filling valve (23) and the balance valve (24) in the storage tank control box (22) are exposed. The operator (400) connects the filling gun (111) to the filling valve (23) and the return air gun (125) to the balance valve (24), so that the filling tank (11) is connected to the fuel storage tank (21).

4. The fuel dispensing system according to claim 3, characterized in that: When the pressure inside the filling tank (11) is greater than the pressure inside the fuel storage tank (21), the existing pressure difference is used directly for filling, and it is not necessary to turn on the electric heating vaporizer (17). The return gas gun (125) and the balance valve (24) do not need to be connected.

5. The fuel dispensing system according to claim 1, characterized in that: When the pressure inside the differential pressure tank (18) is higher than the first set pressure, the vehicle controller (121) controls the electric vaporizer (17) to be de-energized; the range of the first set pressure is 0.36-1.0MPa.

6. The fuel dispensing system according to claim 1, characterized in that: When the pressure inside the filling tank (11) is higher than the second set pressure, the vehicle controller (121) controls the electric vaporizer (17) to be de-energized; the range of the second set pressure is 1.0-2.45MPa.

7. The fuel dispensing system according to claim 1, characterized in that: The temperature setting range is 50℃-60℃.

8. The fuel dispensing system according to claim 1, characterized in that: The pump-equipped tanker (100) also includes a vehicle controller (121), which is circuitically connected to a first sensor group for monitoring one or more data of the filling tank (11) and a second sensor group for monitoring one or more data of the differential pressure tank (18); the gas supply unit (200) also includes a gas supply controller, which is circuitically connected to a third sensor group for monitoring one or more data of the fuel storage tank (21).

9. The fuel dispensing system according to claim 1, characterized in that: The capacity of the filling tank (11) is V1, and the capacity of the fuel storage tank (21) is V2, wherein V1≥3×V2.

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