An electronic fuel refueling nozzle for oil and gas recovery and a method for oil and gas recovery.

Abstract

This invention provides an electronic vapor recovery refueling nozzle, comprising: a sealing and pressure detection module, used to seal the refueling port of the injected container during refueling and to detect the pressure value of the vapor collection hood; and a control module, which determines whether the injected object is equipped with an on-board vapor recovery system based on the pressure value of the vapor collection hood. The electronic vapor recovery refueling nozzle provided by this invention employs a unique sealing structure, enabling secondary vapor recovery at gas stations to occur in a relatively enclosed environment, effectively reducing air intake and mitigating excessive emissions from underground oil tanks caused by air intake.

Description

Technical Field

[0001] This invention relates to the field of refueling equipment technology, and more specifically, to an electronic vapor recovery refueling nozzle and a vapor recovery method. Background Technology

[0002] With the rapid development of the economy and society, the level of intelligence is increasing. As a window for sales enterprises to the public, gas stations need to strengthen their intelligent construction and improve their risk management capabilities. In recent years, with the implementation of online monitoring systems at gas stations, significant results have been achieved in environmental management, and fault alarms have been implemented in areas such as refueling status monitoring, thus increasing the level of safety.

[0003] The refueling system mainly includes fuel dispensers, fuel lines, and fuel nozzles. The data obtained by the gas station's online monitoring system comes from feedback from the fuel dispensers and cannot directly obtain real-time operating data of the fuel nozzles. Traditional fuel nozzles are mechanical, utilizing the Venturi effect to control the nozzle's activation. After prolonged operation, wear and tear on the mechanical components of traditional fuel nozzles can cause abnormal fuel vapor flow, potentially leading to serious safety accidents. Therefore, gas stations typically replace traditional mechanical fuel nozzles periodically, but abnormal operating conditions are still unavoidable.

[0004] For the status detection of fuel nozzles, the existing technology adds a monitoring module to the traditional fuel nozzle. However, the mechanical structure of the fuel nozzle is complex and compact. After adding the monitoring module, the fuel nozzle becomes bulky, which is not conducive to the operation of the fuel station staff. On the other hand, the increased size makes it difficult to adapt to the fuel dispenser.

[0005] To address the problems of existing technologies, this invention provides an electronic oil and gas recovery refueling nozzle and an oil and gas recovery method. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, the present invention provides an electronic oil and gas recovery refueling nozzle, the refueling nozzle comprising:

[0007] The sealing and pressure detection module is used to seal the filling port of the injected container and detect the pressure value of the gas collection hood during the refueling process.

[0008] The control module determines whether the injected object is equipped with an on-board refueling vapor recovery system based on the pressure value of the gas collection hood.

[0009] According to an embodiment of the present invention, the sealing and pressure detection module includes: an oil and gas sealing unit, which is used to seal the filling port of the injected container during the refueling process. The oil and gas sealing unit includes a soft sealing unit and an electromagnetic unit. The soft sealing unit includes multiple pairs of soft sealing materials disposed on the gas collecting hood. The electromagnetic unit includes multiple pairs of sealing electromagnetic structures disposed on the gas collecting hood. During the refueling process, each pair of sealing electromagnetic structures attracts each other, so that each pair of soft sealing materials wraps around the filling port of the injected container to achieve sealing of the filling port of the injected container.

[0010] According to one embodiment of the present invention, the sealing and pressure detection module includes: a pressure detection unit disposed on the gas collection hood, used to detect the pressure value of the gas collection hood during the refueling process.

[0011] According to one embodiment of the present invention, the fuel nozzle includes: a status detection module, which is used to detect the attitude of the fuel nozzle in real time to generate an attitude sensing result and perform anti-drip control according to the attitude control command.

[0012] According to one embodiment of the present invention, the state detection module includes: an attitude sensing unit disposed on the refueling nozzle body, used to sense in real time the angle between the extension direction of the refueling nozzle nozzle and the horizontal plane, so as to generate the attitude sensing result.

[0013] According to one embodiment of the present invention, the state detection module includes an anti-drip unit disposed in the refueling pipeline, which is used to open or close according to the attitude control command, wherein when the anti-drip unit is open, the refueling nozzle has anti-drip capability, and when the anti-drip unit is closed, the refueling nozzle does not have anti-drip capability.

[0014] According to one embodiment of the present invention, the anti-drip unit includes: a self-clogging head and an annular anti-drip electromagnetic structure, wherein the self-clogging head is a T-shaped structure and is disposed on the refueling pipeline, and the anti-drip unit is in an open or closed state when the annular anti-drip electromagnetic structure is attracted to or moves away from the self-clogging head.

[0015] According to one embodiment of the present invention, the control module includes: a state judgment unit, which determines whether to take anti-drip measures based on a preset angle and the angle between the extension direction of the refueling nozzle and the horizontal plane, so as to generate the attitude control command.

[0016] According to one embodiment of the present invention, the refueling nozzle includes: a refueling control module, which is used to detect the liquid level of the injected container during the refueling process, generate a liquid level detection result, and perform refueling control according to the refueling control command.

[0017] According to one embodiment of the present invention, the refueling control module includes: a liquid level detection unit disposed at the nozzle of the refueling gun, used to detect whether the liquid level of the injected container is in contact with the liquid level detection unit during the refueling process, so as to generate the liquid level detection result.

[0018] According to one embodiment of the present invention, the liquid level detection unit includes one or two liquid level sensors disposed on the outer wall of the fuel nozzle, wherein the liquid level sensors are photoelectric liquid level sensors or radar sensors.

[0019] According to one embodiment of the present invention, the refueling control module includes: a refueling controller disposed in the refueling pipeline, used to open or close according to the refueling control command, wherein when the refueling controller is opened, the refueling pipeline is opened, and when the refueling controller is closed, the refueling pipeline is closed.

[0020] According to one embodiment of the present invention, the refueling controller includes: a refueling electromagnetic structure and a sealing plug, wherein the refueling electromagnetic structure is disposed outside the refueling pipeline, and the refueling controller is in an on or off state when the sealing plug is attracted to or away from the refueling electromagnetic structure.

[0021] According to one embodiment of the present invention, the control module includes: a refueling determination unit, which determines whether to end the refueling process based on the liquid level detection result, the refueling machine status and the refueling flow rate, so as to generate the refueling control command.

[0022] According to one embodiment of the present invention, the refueling nozzle comprises:

[0023] The battery, which is located in the fuel nozzle body, meets the waterproof and explosion-proof standards and is used to receive wireless charging energy when the fuel nozzle is idle.

[0024] The flow control module is installed inside the refueling pipeline and is used to statistically analyze the refueling status and flow rate.

[0025] According to another aspect of the present invention, an oil and gas recovery method is also provided, performed by a refueling nozzle as described in any of the preceding claims, the method comprising the following steps:

[0026] During the refueling process, the refueling port of the injected container is sealed by the sealing and pressure detection module, and the pressure value of the gas collection hood is detected.

[0027] The control module determines whether the injected object is equipped with an on-board refueling vapor recovery system based on the pressure value of the gas collection hood.

[0028] According to one embodiment of the present invention, the determination of whether the injected object is equipped with an on-board refueling vapor recovery system is achieved through the following steps:

[0029] Upon receiving a refueling instruction, the sealing and pressure detection module seals the refueling port of the injected container and detects the pressure value of the gas collection hood.

[0030] When the pressure value of the gas collection hood is greater than zero, the low-frequency oil and gas recovery pump is started, and the gas-liquid ratio is calculated through the refueling system.

[0031] When the gas-liquid ratio is greater than the preset value, it indicates that the object being injected is not equipped with an on-board refueling vapor recovery system, and the vapor recovery pump is started at high frequency.

[0032] When the gas-liquid ratio is less than or equal to the preset value, it indicates that the currently injected object is configured with an on-board refueling vapor recovery system, and the vapor recovery pump is kept running at a low frequency.

[0033] According to another aspect of the invention, a storage medium is also provided, which includes a series of instructions for performing the steps of the method described in any of the preceding claims.

[0034] This invention provides an electronic oil and gas recovery refueling nozzle and an oil and gas recovery method, which have the following advantages compared with the prior art:

[0035] (1) The electronic oil and gas recovery refueling gun provided by the present invention adopts a unique sealing structure, which enables the secondary oil and gas recovery of the gas station to be carried out in a relatively closed environment, effectively reducing the intake of air and reducing the problem of excessive emissions caused by air intake in buried oil tanks.

[0036] (2) The electronic oil and gas recovery refueling gun provided by the present invention monitors the pressure change of oil and gas during the oil and gas recovery process by setting a pressure detection unit in the gas collection hood, thereby performing frequency conversion control of the oil and gas recovery vacuum pump, thereby reducing the number of high-frequency operation of the oil and gas recovery vacuum pump and increasing its service life.

[0037] (3) The electronic oil vapor recovery refueling gun provided by the present invention effectively realizes the communication between the refueling gun and the refueling machine and the online oil vapor recovery system, determines whether the refueling vehicle has ORVR, and reduces the need for online monitoring systems;

[0038] (4) The electronic oil and gas recovery refueling gun provided by the present invention uses a liquid level sensor to detect the liquid level of the injected container. Compared with the traditional mechanical refueling gun, the present invention has a more accurate liquid level detection result for the injected container (such as a car fuel tank), effectively reducing false alarms and start-up errors of the refueling gun, and can increase refueling efficiency.

[0039] (5) The electronic oil and gas recovery refueling gun provided by the present invention can monitor the operating status of the refueling gun in real time through the status detection module, which can effectively avoid safety accidents caused by damage to the refueling gun.

[0040] (6) The electronic oil and gas recovery refueling gun provided by the present invention can effectively realize the intelligent interconnection between the refueling gun and the refueling machine through the control module, thereby increasing the intelligence level of the refueling system.

[0041] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0042] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0043] Figure 1 A schematic diagram of an electronic oil and gas recovery refueling nozzle according to an embodiment of the present invention is shown;

[0044] Figure 2 A schematic diagram of an oil-gas sealing unit structure according to an embodiment of the present invention is shown;

[0045] Figure 3 A schematic diagram of a liquid level detection unit structure according to an embodiment of the present invention is shown;

[0046] Figure 4 A schematic diagram of an anti-drip unit structure according to an embodiment of the present invention is shown;

[0047] Figure 5 A flowchart illustrating the steps of an oil and gas recovery method according to an embodiment of the present invention is shown.

[0048] Figure 6 A flowchart of the refueling control method steps according to an embodiment of the present invention is shown;

[0049] Figure 7 A schematic diagram showing the tilt angle of a refueling nozzle according to an embodiment of the present invention is provided.

[0050] In the accompanying drawings, the same parts use the same reference numerals. Also, the drawings are not drawn to scale.

[0051] The meanings of the reference numerals in the attached figures are as follows: 1- Refueling nozzle nozzle; 2- Liquid level detection unit; 3- First liquid level sensor; 4- Second liquid level sensor; 5- Anti-drip unit; 6- Self-sealing plug; 7- Annular anti-drip electromagnetic structure; 9- Attitude sensing unit; 10- Control module; 11- Battery; 12- Refueling electromagnetic structure; 13- Sealing plug; 14- Refueling nozzle stock; 15- Refueling pipeline inlet; 16- Flow control module; 17- Oil and gas sealing unit; 18- Oil and gas inlet; 19- Pressure detection unit; 20- First sealing electromagnetic structure; 21- Second sealing electromagnetic structure; 22- First soft sealing material; 23- Second soft sealing material; 24- Refueling port of the injected container; 25- Third sealing electromagnetic structure; 26- Fourth sealing electromagnetic structure. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0053] Existing technology (CN113307218A) provides an intelligent fuel dispenser, which works in conjunction with a fuel dispenser. It includes: a drive unit, a sensing unit, a timing unit, a communication unit, and a control unit. The control unit controls the operating status of the drive unit, sensing unit, timing unit, and communication unit. Based on the control of the control unit, the drive unit controls the fuel dispensing speed and / or fuel dispensing volume. The sensing unit detects the environment in which the fuel dispenser is used and transmits the detection results to the control unit. The timing unit times the fuel dispensing process and / or completion and transmits the timing results to the control unit. The communication unit, based on the control of the control unit, communicates with an external terminal via a server. This invention has a simple structure, can effectively provide early warning of safety hazards, facilitates hazard elimination and countermeasures, and also enables remote management, facilitating widespread adoption.

[0054] However, the aforementioned existing technologies do not specify the exact structure of the gun body, how to implement it, nor do they mention or solve practical problems such as the implementation of the refueling gun's shut-off structure, nor do they mention how to maintain the seal of the refueling port during the refueling process or how to determine whether the object being injected is equipped with an on-board refueling vapor recovery system.

[0055] The existing technology (CN102020229B) provides a wireless electronic fuel tank lock, a wireless electronic fuel nozzle, and a supporting refueling system. It utilizes ZigBee technology, WSN technology, and embedded system technology to design the wireless electronic fuel tank lock and wireless electronic fuel nozzle. The wireless electronic fuel tank lock is installed on the fuel tank cap of a vehicle, and the wireless electronic fuel nozzle is used on the fuel dispenser at an existing gas station. A certain number of RFD / FFD nodes are formed for each vehicle and each wireless electronic fuel nozzle. A guidance node is installed at the entrance of the gas station where the electronic fuel nozzle is installed, and a navigation node is installed in the parking lot where vehicles are equipped with wireless electronic fuel tank locks. A wireless sensor network is formed using the RFD / FFD nodes, navigation nodes, guidance nodes, and a main controller. The main controller receives data from the RFD / FFD nodes and, according to instructions issued by the host computer monitoring platform, realizes real-time monitoring and control of the system's FFD / RFD nodes, achieving remote control of vehicle electronic identification and fuel refueling.

[0056] However, the aforementioned existing technologies do not mention the intelligence of the refueling nozzle, namely the nozzle shut-off method and related logic, nor do they mention the self-sealing structure of the refueling nozzle's elevation angle and its implementation logic, nor do they mention how to maintain the seal of the refueling port during the refueling process or how to determine whether the object being injected is equipped with an on-board refueling vapor recovery system.

[0057] Existing technology (CN218261970U) provides a fuel nozzle with transmittable status information, comprising: a fuel nozzle body, which is a fuel vapor recovery fuel nozzle structure compatible with an on-board vapor recovery system; a position sensing unit, used to measure the working status information of the sensing valve inside the fuel nozzle body; and a status transmission unit, which has wireless transmission capability, used to transmit the working status information of the sensing valve to the online monitoring system for fuel vapor recovery in the gas station to determine whether the current refueling vehicle has an on-board vapor recovery system. This invention can measure the status of the vapor collection hood and the identification status of the on-board vapor recovery system during the refueling process. Furthermore, it can transmit this information to the online monitoring system for fuel vapor recovery in the gas station in a timely manner, thereby enabling diagnostic analysis of the working status of the fuel nozzle compatible with the on-board vapor recovery system, and giving the online monitoring system intelligent diagnostic functions for fuel nozzles compatible with the on-board vapor recovery system.

[0058] However, the aforementioned existing technologies have made improvements based on the original mechanical refueling nozzles, but have not proposed an electronic intelligent refueling nozzle, nor have they mentioned how to maintain the seal of the refueling port during the refueling process or how to determine whether the object being injected is equipped with an on-board refueling vapor recovery system.

[0059] Traditional mechanical fuel nozzles, commonly used at gas stations, only provide refueling functionality and lack refueling status monitoring capabilities. Furthermore, their size and mechanical structure make it difficult to install status monitoring and transmission systems. This invention provides an electronic vapor recovery fuel nozzle. Firstly, it seals the refueling port, effectively reducing air intake. Secondly, it monitors the pressure during the recovery process using a pressure sensor, effectively identifying whether a vehicle has an onboard vapor recovery system. This allows for adjustment of the vapor recovery pump's operating power and uploading data to an online monitoring system for effective correction of the gas-liquid ratio. By monitoring the pressure during vapor recovery, it identifies vehicles equipped with onboard vapor recovery systems, effectively reducing air intake and excessive emissions from underground fuel tanks. This electronic vapor recovery fuel nozzle effectively monitors and transmits refueling status information and uses an electronic structure to effectively control the refueling process, thereby increasing safety during refueling.

[0060] Figure 1 A schematic diagram of an electronic oil and gas recovery refueling nozzle according to an embodiment of the present invention is shown.

[0061] An electronic vapor recovery refueling nozzle includes a sealing and pressure detection module and a control module 10. The sealing and pressure detection module seals the refueling port of the container being injected during refueling and detects the pressure value of the vapor collection hood. The control module 10 determines whether the object being injected is equipped with an on-board vapor recovery system based on the pressure value of the vapor collection hood.

[0062] In one embodiment, such as Figure 1 As shown, the sealing and pressure detection module includes an oil and gas sealing unit 17, which is used to seal the filling port 24 of the injected container during the refueling process. The oil and gas sealing unit 17 includes a soft sealing unit and an electromagnetic unit. The soft sealing unit includes multiple pairs of soft sealing materials disposed on the gas collection hood, and the electromagnetic unit includes multiple pairs of sealing electromagnetic structures disposed on the gas collection hood. During the refueling process, each pair of sealing electromagnetic structures attracts each other, so that each pair of soft sealing materials wraps around the filling port 24 of the injected container to achieve the sealing of the filling port 24 of the injected container.

[0063] Specifically, such as Figure 2 As shown, the soft sealing unit includes a pair of soft sealing materials disposed on the gas collecting hood, namely a first soft sealing material 22 and a second soft sealing material 23. The electromagnetic unit includes two pairs of sealing electromagnetic structures disposed on the gas collecting hood, namely a first sealing electromagnetic structure 20 and a second sealing electromagnetic structure 21, and a third sealing electromagnetic structure 25 and a fourth sealing electromagnetic structure 26.

[0064] The oil-gas sealing unit 17 is electromagnetically controlled. The outer gas collection cover is made of rubber (e.g., chlorinated polyethylene rubber) and equipped with four sealing electromagnetic structures, the upper and lower two of which are made of soft sealing material (e.g., nitrile rubber). When the fuel nozzle is inserted into the car's fuel tank and refueling is started, the four sealing electromagnetic structures are activated. The first sealing electromagnetic structure 20 and the second sealing electromagnetic structure 21 are attracted to each other, and the third sealing electromagnetic structure 25 and the fourth sealing electromagnetic structure 26 are attracted to each other. This allows the first soft sealing material 22 and the second soft sealing material 23 to cover the fuel tank opening 24, achieving a seal at the fuel tank opening.

[0065] In one embodiment, to avoid electromagnetic structure failure, the oil-gas sealing unit 17 adopts a mechanical sealing structure, the gas collection hood is equipped with a spring, the oil-gas pressure judgment value is changed to -100Pa, and the gas collection hood is made of chlorinated polyethylene rubber.

[0066] Conventional secondary vapor recovery systems at gas stations, limited by the mechanical shut-off mechanism of the fuel nozzle, cannot completely seal the fuel inlet. During operation, negative pressure at the vapor recovery inlet causes a large amount of air to be drawn from the vent hood into the underground fuel tank, leading to a rapid increase in pressure and excessive emissions. The electronic vapor recovery fuel nozzle provided by this invention overcomes these shortcomings. It uses an electronic sensor for shut-off, sealing the fuel inlet and effectively isolating the refueling process from air, thus significantly reducing air intake.

[0067] In one embodiment, such as Figure 1 As shown, the sealing and pressure detection module includes a pressure detection unit 19, which is mounted on the vent hood and used to detect the pressure value of the vent hood during refueling. Specifically, the pressure detection unit 19 uses a pressure sensor.

[0068] Traditional fuel nozzles cannot identify whether the object being refueled (e.g., the vehicle being refueled) is equipped with an Onboard Refueling Vapor Recovery (ORVR) system. This invention utilizes a vapor sealing unit 17 to effectively seal the vehicle's fuel filler neck, allowing for the installation of a pressure detection unit 19 in the vapor collection hood. The pressure value of the vapor collection hood monitored by the pressure detection unit 19 is used to adjust the frequency of the vapor recovery pump.

[0069] It should be noted that, in order to adapt to existing fuel dispensers and vehicles, the overall shape of the electronic vapor recovery fuel dispenser provided by this invention is similar to that of existing traditional mechanical fuel dispensers (e.g., it has a fuel dispenser stock 14, etc.), but this invention makes intelligent improvements based on the traditional mechanical fuel dispenser. Furthermore, the fuel dispenser body mentioned in this invention is the fuel dispenser body of the traditional mechanical fuel dispenser after removing the mechanical structures related to the start-up nozzle.

[0070] In one embodiment, such as Figure 1 As shown, an electronic oil and gas recovery refueling nozzle includes: a status detection module, which is used to detect the attitude of the refueling nozzle in real time to generate attitude sensing results and perform anti-drip control according to attitude control commands.

[0071] In one embodiment, such as Figure 1 As shown, the state detection module includes: an attitude sensing unit 9, which is installed on the refueling nozzle body and is used to sense the angle between the extension direction of the refueling nozzle nozzle 1 and the horizontal plane in real time to generate attitude sensing results.

[0072] Compared to traditional mechanical refueling nozzles, this invention adds a posture sensing unit 9 to determine parameters such as the tilt angle of the refueling nozzle and to trigger an alarm, effectively reducing the occurrence of safety accidents.

[0073] In one embodiment, such as Figure 1 As shown, the status detection module includes an anti-drip unit 5, which is installed in the refueling pipeline and is used to open or close according to the attitude control command. When the anti-drip unit 5 is open, the refueling nozzle has anti-drip capability; when the anti-drip unit 5 is closed, the refueling nozzle does not have anti-drip capability.

[0074] Specifically Figure 4 The anti-drip unit 5 is a cross-sectional view. The anti-drip unit 5 includes: a self-clogging head 6 and an annular anti-drip electromagnetic structure 7. The self-clogging head 6 is a T-shaped structure and is installed on the refueling pipeline. When the annular anti-drip electromagnetic structure 7 is attracted to or moves away from the self-clogging head 6, the anti-drip unit 5 is in the open or closed state.

[0075] Furthermore, the anti-drip unit 5 adopts a solenoid valve design. It determines whether the anti-drip unit 5 is activated based on data fed back from the attitude sensing unit 9. Specifically, the attitude sensing unit 9 first determines whether the fuel nozzle is in an upright position; otherwise, the communication fuel dispenser alarms and displays "Fuel nozzle status abnormal." Then, it determines the angle between the fuel nozzle's extension direction and the horizontal plane. If the angle is greater than a preset angle (e.g., 30°), the anti-drip unit 5 is activated; otherwise, it is deactivated, effectively preventing dripping. The attitude sensing unit 9 ensures more accurate drip prevention and effectively determines whether the fuel nozzle is in operation, guaranteeing the safety of the refueling system.

[0076] In one embodiment, the control module 10 includes a status judgment unit, which determines whether to take anti-drip measures based on a preset angle and the angle between the extension direction of the refueling nozzle and the horizontal plane, so as to generate attitude control commands.

[0077] Specifically, the state judgment unit executes the following logic: Using the horizontal plane as the reference plane, with -90° vertically upward and +90° vertically downward, a drip-proof coordinate system is determined. When the angle between the extension direction of the fuel nozzle and the horizontal plane is [-90°, α1], an attitude control command is generated for the drip-proof unit 5 in the closed state detection module, where α1 represents a preset angle. When the angle between the extension direction of the fuel nozzle and the horizontal plane is (α1, +90°), an attitude control command is generated for the drip-proof unit 5 in the open state detection module.

[0078] In one embodiment, such as Figure 1 As shown, an electronic oil and gas recovery refueling gun includes: a refueling control module, which is used to detect the liquid level in the injected container during the refueling process, generate a liquid level detection result, and perform refueling control according to the refueling control command.

[0079] In one embodiment, such as Figure 1 As shown, the refueling control module includes: a liquid level detection unit 2, which is installed at the refueling nozzle 1, and is used to detect whether the liquid level of the container being injected (e.g., vehicle fuel tank, container to be refueled) is in contact with the liquid level detection unit 2 during the refueling process, so as to generate a liquid level detection result.

[0080] Specifically, such as Figure 3 As shown, the liquid level detection unit 2 includes one or two liquid level sensors disposed on the outer wall of the refueling nozzle, wherein the liquid level sensors are photoelectric liquid level sensors or radar sensors.

[0081] Traditional fuel dispensers in the prior art utilize the Venturi effect to detect the fuel level, but this often results in premature shut-off. To solve this problem, the electronic vapor recovery fuel dispenser provided in this invention employs a level sensor for detection. When the level detection unit 2 uses a photoelectric level sensor, the sensor displays a certain value in air (e.g., a) and a different value in gasoline (or diesel) (e.g., b). When the fuel level exceeds the photoelectric level sensor, the transmitted signal will change abruptly (e.g., from a to b), thus achieving fuel level monitoring. Furthermore, the level detection unit 2 can also employ a radar level sensor.

[0082] In one embodiment, such as Figure 3 As shown, the liquid level detection unit 2 includes a liquid level sensor disposed on the outer wall of the fuel nozzle, for example, it may only include a first liquid level sensor 3 or a second liquid level sensor 4. Specifically, the liquid level detection unit 2 uses a single photoelectric liquid level sensor to measure the signal value 'a' of the sensor in air, and then measures the signal value 'b' of the sensor in 92 gasoline. The value 'b' differs significantly from the value 'a', so when the signal value changes abruptly, it is considered that a liquid level has been detected.

[0083] Furthermore, to prevent a single liquid level sensor from malfunctioning and causing a safety accident, such as... Figure 3 As shown, the liquid level detection unit 2 includes two liquid level sensors installed on the outer wall of the fuel nozzle, such as a first liquid level sensor 3 and a second liquid level sensor 4. The control logic incorporates a dual-sensor determination: the container is considered full of gasoline (or diesel) only when both liquid level sensors detect a liquid level. If only one liquid level sensor detects a signal transition while the other does not, the fuel nozzle is considered malfunctioning.

[0084] In one embodiment, the liquid level detection unit 2 employs a photoelectric liquid level sensor and a radar sensor. The photoelectric sensor measures the signal value 'a' in air and then measures the signal value 'b' in 92-octane gasoline. Since the value 'b' differs significantly from 'a', a sudden change in signal value is considered a detection of liquid level. To prevent liquid level sensor malfunction, a radar sensor is used for auxiliary measurement. The radar sensor measures the distance to the liquid level as 'm', and the sensor parameters are corrected so that 'm' is zero when the photoelectric liquid level sensor responds. This invention adds dual sensor determination: the fuel tank is considered full only when both sensors detect the liquid level. If one sensor detects a signal transition while the other does not, the fuel nozzle is considered malfunctioning.

[0085] In one embodiment, the refueling control module includes a refueling controller disposed on the refueling pipeline for opening or closing according to a refueling control command, wherein when the refueling controller is opened, the refueling pipeline is opened, and when the refueling controller is closed, the refueling pipeline is closed.

[0086] Specifically, such as Figure 1 As shown, the refueling controller includes a refueling electromagnetic structure 12 and a sealing plug 13. The refueling electromagnetic structure 12 is located on the outside of the refueling pipeline. When the sealing plug 13 is attracted to or away from the refueling electromagnetic structure 12, the refueling controller is in the open or closed state.

[0087] Unlike the complex start-up structure of traditional fuel nozzles in existing technologies, this invention employs electromagnetic start-up control. When the sealing plug 13 is attached to the fueling electromagnetic structure 12, the fueling controller is in the open state, allowing fuel to flow along the fueling pipeline from the fueling pipeline inlet 15 to the anti-drip unit 5. If the anti-drip unit 5 is in the closed state, the fuel can continue to flow through the oil and gas inlet 18 to the fuel nozzle outlet 1, at which point the fuel nozzle can refuel the container. When the sealing plug 13 moves away from the fueling electromagnetic mechanism 12, the fueling controller is in the closed state, preventing fuel from flowing along the fueling pipeline from the fueling pipeline inlet 15 to the anti-drip unit 5, and at this point, the fuel nozzle cannot refuel the container.

[0088] In one embodiment, the control module 10 includes a refueling determination unit, which determines whether to end the refueling process based on the liquid level detection result, the status of the refueling machine, and the refueling flow rate, so as to generate a refueling control command.

[0089] Specifically, the refueling judgment unit executes the following logic: When the refueling button on the refueling nozzle is pressed, it first determines whether the liquid level in the container being injected has exceeded the liquid level detection unit 2. If it has not exceeded the liquid level, it proves that the container is full of oil, and a stop command is sent to the refueling machine. If the liquid level has not exceeded the liquid level, the refueling machine starts. Then it determines whether the refueling machine starts normally. If the refueling machine does not start normally, the refueling machine page alarms and displays "Refueling machine oil pump failure". If the refueling machine starts normally, the refueling controller of the refueling nozzle is turned on. Then it determines whether the refueling flow rate is normal. If the refueling flow rate is abnormal, the refueling machine stops and alarms, and the refueling machine page displays "Oil nozzle failure". If the refueling flow rate is normal, refueling begins, and then it returns to the liquid level detection unit 2. If the container is full, the refueling machine stops, and the refueling process is completed.

[0090] In one embodiment, the control module 10 includes a communication unit that communicates with the fuel dispenser, the sealing and pressure detection module, the status detection module, and the fuel control module.

[0091] Specifically, after the communication unit collects information, it transmits and receives it effectively using the low-power IoT technology ZigBee for refueling nozzle status control. Further, after collecting information, the communication unit transmits and receives it effectively using the low-power IoT technology LoRa for refueling nozzle status control. In one embodiment, after collecting information, the communication unit transmits and receives it effectively using the low-power IoT technology FSK for refueling nozzle status control.

[0092] In this invention, the control module 10 is the brain of the fuel nozzle, which collects and processes the status of the fuel nozzle, such as flow rate, nozzle posture, receiving and sending fuel dispenser information, etc., to achieve intelligent operation.

[0093] In one embodiment, such as Figure 1 As shown, the electronic oil and gas recovery refueling gun provided by the present invention includes: a battery 11, which is installed in the refueling gun body, meets the waterproof and explosion-proof standards, and is used to receive wireless charging energy when the refueling gun is idle.

[0094] Specifically, the electronic oil and gas recovery refueling nozzle provided by this invention is equipped with a rechargeable battery, and the battery compartment has a waterproof rating greater than IP68 and a battery explosion-proof rating greater than ExdⅡBT4. The nozzle mounting point of the refueling machine is equipped with a wireless charging module to ensure that the refueling nozzle can be charged when idle, thereby ensuring the effective operation of the refueling nozzle around the clock.

[0095] Furthermore, battery 11 uses a lithium battery and is equipped with a wireless charging module. A wireless charger is installed on the fuel dispenser so that the fuel nozzle can be wirelessly charged when it is not in use, ensuring real-time monitoring of the fuel nozzle.

[0096] In one embodiment, such as Figure 1 As shown, the electronic oil and gas recovery refueling gun provided by the present invention includes: a flow control module 16, which is installed in the refueling pipeline and is used to count the refueling status and refueling flow of the refueling pipeline.

[0097] Specifically, the electronic oil and gas recovery refueling nozzle provided by this invention is equipped with a flow detection module 16, which performs detailed detection of the refueling status and serves as one of the valid bases for opening or closing the refueling nozzle.

[0098] Furthermore, the flow control module 16 monitors the refueling flow status and uploads it to the refueling system, comparing it with the monitoring data of the fuel dispenser flow meter to monitor the real-time operating status of the fuel nozzle.

[0099] In one embodiment, the flow control module 16 is not provided in the fuel nozzle, and the fuel nozzle detection data is provided by the fuel dispenser as the fuel nozzle start-up determination condition.

[0100] The electronic vapor recovery refueling nozzle provided by this invention uses a liquid level sensor to detect the liquid level in the injected container. Compared with traditional mechanical refueling nozzles, this invention provides more accurate liquid level detection results for the injected container (such as a car fuel tank), effectively reducing false liquid level alarms and start-up errors, and increasing refueling efficiency.

[0101] The electronic oil and gas recovery refueling nozzle provided by this invention can monitor the operating status of the refueling nozzle in real time through a status detection module, effectively avoiding safety accidents caused by refueling nozzle damage.

[0102] The electronic oil and gas recovery refueling nozzle provided by this invention can effectively realize the intelligent interconnection between the refueling nozzle and the refueling machine through the control module 10, thereby increasing the intelligence level of the refueling system.

[0103] This invention is primarily applied to the use of fuel dispensers in gas stations. It achieves intelligent management and risk control during the refueling process by monitoring the refueling flow and the real-time status of the fuel nozzle, thereby improving the overall informatization level of the refueling process. The novel electronic vapor recovery fuel nozzle provided by this invention enhances the intelligence level of gas stations, laying the foundation for intelligent refueling processes and demonstrating promising development prospects.

[0104] This invention is mainly applied to the use of fuel dispensers in gas stations. Based on an electronic vapor recovery fuel nozzle, this invention achieves closed-loop recovery of oil and gas during the secondary vapor recovery process, reducing excessive air intake and excessive emissions from underground oil tanks. On the other hand, the electronic vapor recovery fuel nozzle communicates with an online monitoring system to determine whether a vehicle is equipped with ORVR (Organic Vapor Recovery), solving the problem of current online monitoring systems reporting errors when refueling ORVR vehicles, and increasing the overall intelligence level of gas stations.

[0105] The novel electronic oil and gas recovery refueling nozzle provided by this invention improves the intelligence level of gas stations, lays the foundation for the intelligentization of the entire refueling process, and has good development prospects.

[0106] According to another aspect of the present invention, a method for recovering vapors is also provided, which is executed by an electronic vapor recovery refueling nozzle. Specifically, during refueling, the refueling port of the injected container is sealed by a sealing and pressure detection module, and the pressure value of the vapor collection hood is detected. The control module 10 determines whether the injected object is equipped with an on-board refueling vapor recovery system based on the pressure value of the vapor collection hood.

[0107] Figure 5 A flowchart illustrating the steps of an oil and gas recovery method according to an embodiment of the present invention is shown.

[0108] like Figure 5 As shown, in step S501, a refueling command is issued. Specifically, when the refueling button on the refueling nozzle is pressed, it indicates that the refueling nozzle has received a refueling command.

[0109] like Figure 5 As shown, in step S502, the oil-gas sealing unit 17 is activated. Specifically, after receiving the refueling command, the oil-gas sealing unit 17 in the sealing and pressure detection module seals the refueling port 24 of the injected container.

[0110] like Figure 5 As shown, in step S503, it is determined whether the pressure value of the gas collection hood is greater than zero. Specifically, the pressure value of the gas collection hood is detected by the pressure detection unit 19 in the sealing and pressure detection module. If the determination result of step S503 is negative, the oil and gas recovery pump stops in step S504. If the determination result of step S503 is positive, the oil and gas recovery pump starts at low frequency in step S505. Specifically, when the pressure value of the gas collection hood is greater than zero, the oil and gas recovery pump starts at low frequency, and the gas-liquid ratio is calculated by the refueling system.

[0111] like Figure 5As shown, in step S506, it is determined whether the gas-liquid ratio is greater than a preset value (e.g., 0.9). If the determination result of step S506 is yes, then proceed to step S507. If the determination result of step S506 is no, then proceed to step S509.

[0112] like Figure 5 As shown, in step S507, the oil and gas recovery pump starts at high frequency and maintains a pressure of -100 to 0 Pa. In step S508, the data is uploaded to the online monitoring system and "non-ORVR vehicle" is displayed.

[0113] like Figure 5 As shown, in step S509, the oil and gas recovery pump starts at a low frequency and maintains a pressure of -100 to 0 Pa. In step S510, the data is uploaded to the online monitoring system and "ORVR vehicle" is displayed.

[0114] Specifically, upon receiving a refueling instruction, the vapor sealing unit 17 activates to seal the vehicle's fuel filler neck 24. Simultaneously, the pressure detection unit 19 detects the pressure value of the vapor chamber. When the detected pressure exceeds 0 Pa, the vapor recovery pump starts at a low frequency. Subsequently, the refueling system calculates the gas-liquid ratio. If the gas-liquid ratio is greater than 0.9, it indicates that the vehicle being refueled is not equipped with ORVR (Organic Vapor Recycling). The vapor recovery pump then starts at a high frequency to maintain a slight negative pressure on the vapor chamber and uploads the data to the online monitoring system, displaying the vehicle as a "non-ORVR vehicle." When the gas-liquid ratio is less than 0.9, the vapor recovery pump continues to start at a low frequency to maintain a slight negative pressure on the vapor chamber, and the data is uploaded to the online monitoring system, indicating the vehicle as an "ORVR vehicle."

[0115] The electronic vapor recovery refueling nozzle provided by this invention solves the problem of incorrect display information when the gas-liquid ratio is not up to standard when refueling vehicles equipped with ORVR in the online monitoring system of gas stations.

[0116] Furthermore, the electronic vapor recovery refueling nozzle provided by this invention is compatible with the online monitoring system of gas stations and has communication functions. Through its own sensors, it can more accurately monitor the refueling status and achieve dual communication with both the refueling machine and the online monitoring system of the gas station. This invention adopts low-power Internet of Things technologies such as Zigbee and LoRa.

[0117] According to another aspect of the present invention, a refueling status detection method is also provided, comprising: detecting the attitude of the refueling nozzle in real time through a status detection module to generate an attitude sensing result, and performing anti-drip control according to an attitude control command. During the refueling process, the liquid level in the injected container is detected through a refueling control module to generate a liquid level detection result, and refueling control is performed according to a refueling control command. The control module 10 generates an attitude control command based on the attitude sensing result and a refueling control command based on the liquid level detection result.

[0118] Figure 6A flowchart of the refueling control method steps according to an embodiment of the present invention is shown.

[0119] In one embodiment, such as Figure 6 As shown, refueling is controlled through steps S601-S609.

[0120] like Figure 6 As shown, in step S601, a refueling command is issued. Specifically, when the refueling button on the refueling nozzle is pressed, it indicates that the refueling nozzle has received a refueling command.

[0121] like Figure 6 As shown, in step S602, it is determined whether the liquid level in the injected container exceeds the liquid level sensor. Specifically, after receiving the refueling command, it is determined whether the liquid level in the injected container exceeds the liquid level sensor in the refueling control module. In one embodiment, the liquid level sensor is a photoelectric liquid level sensor. The signal value 'a' of the sensor in air is measured, and then the signal value 'b' of the sensor in 92 gasoline is measured. The value 'b' differs significantly from the value 'a', so it is considered that a liquid level has been detected when the signal value changes abruptly.

[0122] like Figure 6 As shown, if the judgment result of step S602 is yes, it proves that the oil in the filling container is full, then proceed to step S603 to generate a stop command for the fuel dispenser. If the judgment result of step S602 is no, then proceed to step S604 to generate a start command for the fuel dispenser.

[0123] like Figure 6 As shown, in step S605, it is determined whether the fuel dispenser has started normally. If the result of step S605 is negative, then proceed to step S606, generating a fuel dispenser alarm command, i.e., the fuel dispenser has not started normally, the fuel dispenser page alarms, displaying "Fuel dispenser pump failure". If the result of step S605 is positive, then proceed to step S607, generating a fuel control command to activate the fuel controller in the fuel control module, i.e., if the fuel dispenser starts normally, the fuel controller of the fuel nozzle is activated.

[0124] like Figure 6 As shown, in step S608, it is determined whether the refueling flow rate is normal. If the result of step S608 is negative, then in step S609, a stop and alarm command for the refueling machine is generated. That is, if the refueling flow rate is abnormal, the refueling machine stops and alarms, and the refueling machine page displays "Fuel nozzle malfunction". If the result of step S608 is positive, then the process returns to step S602 to determine whether the liquid level in the injected container exceeds the liquid level sensor in the refueling control module.

[0125] Figure 7 A schematic diagram showing the tilt angle of a refueling nozzle according to an embodiment of the present invention is provided.

[0126] In one embodiment, such as Figure 7 As shown, anti-drip control is performed through the following steps: Using the horizontal plane as the reference plane, with -90° vertically upward and +90° vertically downward, an anti-drip coordinate system is determined. When the angle between the extension direction of the fuel nozzle and the horizontal plane is [-90°, α1], an attitude control command is generated for the anti-drip unit in the closed state detection module, where α1 represents a preset angle, such as 30°. When the angle between the extension direction of the fuel nozzle and the horizontal plane is (α1, +90°), an attitude control command is generated for the anti-drip unit in the open state detection module.

[0127] Specifically, the decision to implement anti-dripping measures is based on the gun's tilt angle. With the muzzle horizontal as zero, the downward tilt angle is α, and the upward tilt angle is -α. Figure 7 As shown, specific location information is used to calibrate the attitude sensing unit 9. When α > 30°, the anti-drip unit 5 is turned on, and when α ≤ 30°, the anti-drip unit 5 is turned off.

[0128] Furthermore, for special operating conditions, the refueling nozzle is equipped with a physical solenoid valve switch lock. Under normal operating conditions, it is open by default, and the physical solenoid valve is automatically controlled by the attitude sensing unit 9. Under special operating conditions, the physical solenoid valve switch lock is closed, and the physical solenoid valve is always in the open state, suitable for refueling at any angle. The attitude sensing unit 9 is calibrated using the nozzle's horizontal zero point; if an abnormal state occurs, it is considered that the refueling nozzle has slipped.

[0129] The electronic oil and gas recovery refueling nozzle and oil and gas recovery method provided by the present invention can also be used with a computer-readable storage medium, on which a computer program is stored, and the computer program is executed to run an oil and gas recovery method and a refueling status detection method.

[0130] Computer programs can execute computer instructions, which include computer program code. Computer program code can be in the form of source code, object code, executable files, or some intermediate form.

[0131] Computer-readable storage media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0132] It should be noted that the contents of computer-readable storage media may be appropriately added to or subtracted from the contents according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media may not include electrical carrier signals and telecommunication signals.

[0133] In one embodiment, compared with a traditional mechanical refueling nozzle, which, under normal operating conditions, cannot identify vehicle type and cannot control the frequency of the vacuum pump, and uses a common gas collection hood, the pressure sensor cannot determine the oil and gas status. The electronic vapor recovery refueling nozzle provided by this invention, under simulated operating conditions, reduces the pressure increase of the buried oil tank at the same time and under the same conditions. Furthermore, due to the vapor sealing unit 17, this invention can seal the refueling port 24, further allowing the determination of whether the injected object is equipped with an on-board refueling vapor recovery system based on the pressure value of the gas collection hood.

[0134] In summary, this invention provides an electronic oil and gas recovery refueling nozzle and an oil and gas recovery method, which have the following advantages compared with the prior art:

[0135] (1) The electronic oil and gas recovery refueling gun provided by the present invention adopts a unique sealing structure, which enables the secondary oil and gas recovery of the gas station to be carried out in a relatively closed environment, effectively reducing the intake of air and reducing the problem of excessive emissions caused by air intake in buried oil tanks.

[0136] (2) The electronic oil and gas recovery refueling gun provided by the present invention monitors the pressure change of oil and gas during the oil and gas recovery process by setting a pressure detection unit in the gas collection hood, thereby performing frequency conversion control of the oil and gas recovery vacuum pump, thereby reducing the number of high-frequency operation of the oil and gas recovery vacuum pump and increasing its service life.

[0137] (3) The electronic oil vapor recovery refueling gun provided by the present invention effectively realizes the communication between the refueling gun and the refueling machine and the online oil vapor recovery system, determines whether the refueling vehicle has ORVR, and reduces the need for online monitoring systems;

[0138] (4) The electronic oil and gas recovery refueling gun provided by the present invention uses a liquid level sensor to detect the liquid level of the injected container. Compared with the traditional mechanical refueling gun, the present invention has a more accurate liquid level detection result for the injected container (such as a car fuel tank), effectively reducing false alarms and start-up errors of the refueling gun, and can increase refueling efficiency.

[0139] (5) The electronic oil and gas recovery refueling gun provided by the present invention can monitor the operating status of the refueling gun in real time through the status detection module, which can effectively avoid safety accidents caused by damage to the refueling gun.

[0140] (6) The electronic oil and gas recovery refueling gun provided by the present invention can effectively realize the intelligent interconnection between the refueling gun and the refueling machine through the control module, thereby increasing the intelligence level of the refueling system.

[0141] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0142] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0143] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0144] Certain terms are used throughout this application to refer to specific system components. As those skilled in the art will recognize, the same components may often be referred to by different names, and therefore this application is not intended to distinguish those components that differ only in name and not in function. In this application, the terms “comprise,” “include,” and “have” are used in an open-ended manner and should therefore be interpreted as meaning “including, but not limited to…”. Furthermore, the terms “substantially,” “materially,” or “approximately” as used herein refer to industry-accepted tolerances for the corresponding terms. The term “coupling,” as may be used herein, includes direct coupling and indirect coupling via additional components, elements, circuits, or modules, wherein, for indirect coupling, the intermediate component, element, circuit, or module does not alter the information of the signal but may adjust its current level, voltage level, and / or power level. Inferred coupling (e.g., one element is inferredly coupled to another element) includes direct and indirect coupling between two elements in the same manner as “coupling.”

[0145] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0146] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0147] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. An electronic vapor recovery fuel dispensing nozzle comprising: The refueling gun comprises: a sealing and pressure detection module for sealing the refueling port of the injected container and detecting the pressure value of the gas collection cover during the refueling process; a control module for judging whether the injected object is configured with the vehicle-mounted refueling vapor recovery system based on the pressure value of the gas collection cover; the sealing and pressure detection module comprises an oil vapor sealing unit for sealing the refueling port of the injected container during the refueling process, wherein the oil vapor sealing unit comprises a plurality of pairs of soft sealing materials arranged on the gas collection cover and a plurality of pairs of sealing electromagnetic structures arranged on the gas collection cover, each pair of sealing electromagnetic structures is attracted to each other during the refueling process, so that each pair of soft sealing materials wraps the refueling port of the injected container to achieve the sealing of the refueling port of the injected container; whether the injected object is configured with the vehicle-mounted refueling vapor recovery system is judged by the following steps: after receiving the refueling instruction, the sealing and pressure detection module seals the refueling port of the injected container and detects the pressure value of the gas collection cover; when the pressure value of the gas collection cover is greater than zero, the oil vapor recovery pump is started at a low frequency, and the gas-liquid ratio is calculated through the refueling system; when the gas-liquid ratio is greater than a preset value, it is indicated that the current injected object is not configured with the vehicle-mounted refueling vapor recovery system, and the oil vapor recovery pump is started at a high frequency; when the gas-liquid ratio is less than or equal to the preset value, it is indicated that the current injected object is configured with the vehicle-mounted refueling vapor recovery system, and the oil vapor recovery pump is maintained at a low frequency.

2. An electronic vapor recovery fuel dispensing nozzle as defined in claim 1 wherein, The sealing and pressure detection module comprises a pressure detection unit arranged on the gas collection cover for detecting the pressure value of the gas collection cover during the refueling process.

3. An electronic vapor recovery fuel dispensing nozzle as defined in claim 1 wherein, The refueling gun comprises a state detection module for detecting the posture of the refueling gun in real time to generate a posture sensing result and performing anti-dripping control according to a posture control instruction.

4. An electronic vapor recovery fuel dispensing nozzle as defined in claim 3 wherein, The state detection module comprises a posture sensing unit arranged on the refueling gun body for sensing the included angle between the extension direction of the nozzle of the refueling gun and the horizontal plane in real time to generate the posture sensing result.

5. An electronic vapor recovery fuel dispensing nozzle as defined in claim 3 wherein, The state detection module comprises an anti-dripping unit arranged in the refueling pipeline for being opened or closed according to the posture control instruction, wherein the refueling gun has the anti-dripping capability when the anti-dripping unit is opened, and the refueling gun does not have the anti-dripping capability when the anti-dripping unit is closed.

6. An electronic vapor recovery fuel dispensing nozzle as defined in claim 5 wherein, The anti-dripping unit comprises a self-plugging head and an annular anti-dripping electromagnetic structure, wherein the self-plugging head is a T-shaped structure arranged on the refueling pipeline, and the annular anti-dripping electromagnetic structure is attracted to or away from the self-plugging head, so that the anti-dripping unit is in the opened or closed state.

7. An electronic vapor recovery fuel dispensing nozzle as defined in claim 4 wherein, The control module comprises a state judgment unit for determining whether to take anti-dripping measures based on the preset angle and the included angle between the extension direction of the nozzle of the refueling gun and the horizontal plane to generate the posture control instruction.

8. An electronic vapor recovery fuel dispensing nozzle as defined in claim 1 wherein, The refueling gun comprises a refueling control module for detecting the liquid level of the injected container during the refueling process to generate a liquid level detection result and performing refueling control according to a refueling control instruction.

9. An electronic vapor recovery fuel dispensing nozzle as defined in claim 8 wherein, The fueling control module comprises a liquid level detection unit arranged at the nozzle of the fueling gun, which is used to detect whether the liquid level of the container being filled contacts the liquid level detection unit in the fueling state to generate the liquid level detection result.

10. An electronic vapor recovery fuel dispensing nozzle as defined in claim 9 wherein, The liquid level detection unit comprises one or two liquid level sensors arranged at the outer wall of the nozzle of the fueling gun, wherein the liquid level sensor is a photoelectric liquid level sensor or a radar sensor.

11. An electronic vapor recovery fuel dispensing nozzle as defined in claim 8 wherein, The fueling control module comprises a fueling controller arranged at the fueling pipeline, which is used to open or close according to the fueling control instruction, wherein the fueling pipeline is opened when the fueling controller is opened, and the fueling pipeline is closed when the fueling controller is closed.

12. An electronic vapor recovery fuel dispensing nozzle as defined in claim 11 wherein, The fueling controller comprises a fueling electromagnetic structure arranged at the outer side of the fueling pipeline and a sealing plug, wherein the fueling controller is in the open or closed state when the sealing plug is attracted to or away from the fueling electromagnetic structure.

13. An electronic vapor recovery fuel dispensing nozzle as defined in claim 8 wherein, The control module comprises a fueling judgment unit, which is used to determine whether to end the fueling process based on the liquid level detection result, the fueling machine state and the fueling flow condition to generate the fueling control instruction.

14. An electronic vapor recovery fuel dispensing nozzle as set forth in any one of claims 1-13 wherein, The fueling gun comprises: a battery arranged at the body of the fueling gun, which meets the waterproof and explosion-proof level, and is used to receive wireless charging energy when the fueling gun is idle; a flow control module arranged in the fueling pipeline, which is used to count the fueling state and the fueling flow of the fueling pipeline.

15. A method of oil and gas recovery, characterized by, The method is performed by the fueling gun according to any one of claims 1-14, and the method comprises the following steps: During the fueling process, the fueling port of the container being filled is sealed by the sealing and pressure detection module, and the pressure value of the gas collection cover is detected; whether the object being filled is configured with a vehicle-mounted fueling oil gas recovery system is judged by the control module based on the pressure value of the gas collection cover.

16. A storage medium, characterized by It comprises a series of instructions for performing the method steps of claim 15.

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