Exhaust device special for refueling trolley

Abstract

The utility model relates to an exhaust device special for a refueling trolley, which comprises a fuel tank, an exhaust pipe and an exhaust auxiliary component, the fuel tank is communicated with the exhaust auxiliary component through the exhaust pipe, and fuel steam in the fuel tank is exhausted through the exhaust auxiliary component; the control module is in communication connection with the exhaust auxiliary assembly, and the control module is used for controlling opening or closing of the exhaust auxiliary assembly; the pressure sensor is installed on the fuel tank and used for monitoring the fuel steam pressure in the fuel tank; the pressure sensor is in communication connection with the control module, and the control module controls opening or closing of the exhaust auxiliary assembly according to a pressure signal of the pressure sensor. By arranging the exhaust pipe and the exhaust auxiliary assembly, fuel steam can be exhausted in time, and the use safety of the refueling trolley is improved; and secondly, through the collaborative design of introducing the pressure sensor, the control module and the exhaust auxiliary device, the real-time detection of the fuel steam pressure is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel filling equipment technical field, concretely relates to an exhaust device special for refueling trolley. BACKGROUND

[0002] In modern industry and logistics field, refueling trolley is widely used to provide convenient fuel supply service for various mechanical equipment. However, the fuel in fuel tank will continuously volatilize and produce fuel vapor during the operation of refueling trolley. If these fuel vapors cannot be discharged in time, the pressure in fuel tank will gradually increase, and the overhigh pressure will cause damage to the structure of fuel tank, reduce its service life, and even possibly cause serious safety accidents such as fuel tank rupture, endangering the safety of operating personnel and surrounding environment; secondly, the accumulation of fuel vapors will also affect the normal flow and transportation of fuel, resulting in problems such as poor oil supply and low oil filling efficiency of refueling trolley during oil filling process. SUMMARY

[0003] The utility model provides a kind of exhaust device special for refueling trolley, to solve the problem of fuel tank in the accumulation of fuel vapor and the overhigh pressure in fuel tank.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0005] An exhaust device special for refueling trolley, comprising: a fuel tank, an exhaust pipe and an exhaust auxiliary assembly, the fuel tank is communicated with the exhaust auxiliary assembly through the exhaust pipe, and the fuel vapor in the fuel tank is discharged through the exhaust auxiliary assembly; a control module, the control module is communicatively connected with the exhaust auxiliary assembly, and the control module is used to control the opening or closing of the exhaust auxiliary assembly; a pressure sensor, the pressure sensor is installed on the fuel tank to monitor the fuel vapor pressure in the fuel tank; the pressure sensor is communicatively connected with the control module, and the control module controls the opening or closing of the exhaust auxiliary assembly according to the pressure signal of the pressure sensor.

[0006] According to the above technical means, by setting the exhaust pipe and the exhaust auxiliary assembly, the fuel vapor can be discharged in time, preventing the fuel tank from accumulating and causing excessive pressure, and further preventing safety problems, greatly improving the use safety of the refueling trolley. Moreover, stable fuel vapor pressure helps to reduce the pressure impact and wear on the fuel tank and related fuel system components, thereby prolonging the overall service life of the refueling trolley fuel system. Secondly, through the cooperative design of the pressure sensor, the control module and the exhaust auxiliary device, real-time detection of the fuel vapor pressure is realized. Among them, the pressure sensor can dynamically sense the pressure change in the fuel tank and transmit the signal to the control module. The control module starts or stops the exhaust auxiliary assembly in real time according to the pressure signal, ensuring efficient vapor discharge while avoiding excessive energy consumption.

[0007] Further, the exhaust auxiliary assembly includes an activated carbon tank mounted at the end of the exhaust pipe for absorbing and purifying the fuel vapor generated when the fuel tank is refueled.

[0008] According to the above technical means, the activated carbon tank absorbs fuel vapor, to some extent, helps to maintain stable pressure in the fuel tank, avoids excessive pressure due to fuel vapor accumulation, reduces the risk of safety accidents such as fuel tank rupture, and ensures safe operation of the refueling trolley. Secondly, by adsorbing and purifying fuel vapor, the emission of volatile organic compounds into the atmosphere is reduced, reducing environmental pollution and meeting environmental protection requirements. At the same time, the adsorbed fuel vapor can be reused under suitable conditions, avoiding fuel waste and achieving energy recycling.

[0009] Further, the exhaust auxiliary assembly further includes a one-way valve mounted on the exhaust pipe, and one end of the one-way valve is in communication with the fuel tank through the exhaust pipe, and the other end of the one-way valve is in communication with the activated carbon tank.

[0010] According to the above technical means, the one-way valve ensures that the fuel vapor generated when the fuel tank is refueled can only flow from the fuel tank to the activated carbon tank, avoiding backflow of fuel vapor into the fuel tank, maintaining a stable airflow direction, and allowing the activated carbon tank to continuously and efficiently adsorb fuel vapor. Secondly, due to the one-way flow restriction of the one-way valve, it can prevent gases or impurities in the activated carbon tank from entering the fuel tank under abnormal conditions, avoiding contamination of the fuel and damage to the internal structure of the fuel tank and components of the fuel delivery system, and prolonging the service life of the fuel tank and related equipment.

[0011] Further, the exhaust auxiliary assembly further includes a filter mounted on the exhaust pipe, and the other end of the one-way valve is in communication with the activated carbon tank through the filter, so that the filter filters out impurities in the fuel vapor in the fuel tank.

[0012] According to the above technical means, the filter can effectively intercept impurities, avoid the active carbon tank from being blocked or contaminated, prolong the service life of the active carbon tank, ensure the stable adsorption and storage of fuel vapor in the active carbon tank, and maintain the normal operation of the entire exhaust device. Secondly, the filter filters out impurities, so that the fuel vapor can flow smoothly from the fuel tank to the active carbon tank through the exhaust pipe, the one-way valve and the filter, ensuring the stability and reliability of the gas flow in the fuel system, reducing system failures caused by impurities, such as pipeline blockage and valve jamming, and improving the overall working stability of the refueling trolley fuel system.

[0013] Further, the filter comprises a plurality of filter screens, and the pore sizes of the plurality of filter screens gradually decrease in the direction from the one-way valve to the active carbon tank, so that the filter filters impurities in the fuel vapor in the fuel tank.

[0014] According to the above technical means, the design of the plurality of filter screens with gradually decreasing pore sizes can achieve the fractional filtration of impurities of different particle sizes in the fuel vapor, greatly improving the filtration effect of the fuel vapor, and ensuring that the fuel vapor entering the active carbon tank is more pure. Secondly, through fractional filtration, impurities of different particle sizes are dispersed in different levels of filter screens for interception, avoiding the rapid blockage of a single filter screen due to the filtration of impurities of different sizes, so that each filter screen can maintain good filtration performance for a long time, prolonging the replacement cycle of the filter screens in the entire filter and reducing maintenance costs.

[0015] Further, the exhaust auxiliary assembly further comprises an exhaust fan, the exhaust fan is installed on the exhaust pipe, one end of the exhaust fan is in communication with the filter, the other end of the exhaust fan is in communication with the active carbon tank, and the exhaust fan is in communication connection with the control module, so that the control module opens or closes the exhaust fan according to the pressure signal.

[0016] According to the above technical means, the exhaust fan can actively provide power to accelerate the flow of fuel vapor in the exhaust pipe, and then quickly deliver the fuel vapor to the active carbon tank, so that the active carbon tank can continuously contact fresh fuel vapor to be treated, avoid the local saturation of the adsorption area of the active carbon tank due to the slow flow rate of the fuel vapor, improve the adsorption efficiency of volatile organic compounds in the fuel vapor by the active carbon tank, and enhance the purification capacity of the entire exhaust auxiliary assembly for the fuel vapor. Secondly, the exhaust fan is in communication connection with the control module, and the control module controls the opening or closing of the exhaust fan according to the pressure signal from the pressure sensor. When the amount of fuel vapor generated is small and the pressure is low, the exhaust fan is closed to avoid unnecessary energy consumption. When the pressure rises to a set threshold, the exhaust fan starts to ensure timely exhaust, realizes intelligent and precise exhaust control, and is energy-saving and efficient.

[0017] Further, the exhaust auxiliary assembly further comprises a heater, the heater is arranged around the outer periphery of the exhaust pipe, and the one-way valve, the filter and the exhaust fan are all installed on the inner side of the exhaust pipe covered by the heater, so that the heater uniformly heats the one-way valve, the filter and the exhaust fan in the exhaust pipe; the heater is in communication connection with the control module, so that the control module opens or closes the heater according to the pressure signal.

[0018] According to the above technical means, the heater is in communication connection with the control module, the control module controls the opening or closing of the heater according to the pressure signal of the pressure sensor, thereby maintaining the temperature of the fuel vapor in the exhaust pipe, so that the exhaust auxiliary device can continuously and efficiently deliver the fuel vapor to the activated carbon canister, improve the reliability and stability of the whole device; secondly, the heater can uniformly heat the one-way valve, the filter and the exhaust fan in the exhaust pipe, maintain the component temperature, prevent the condensation of fuel vapor and related failures caused by low temperature, ensure the normal operation of the exhaust system in cold environment, reduce the damage of low temperature to the one-way valve, the filter and the exhaust fan, prolong the service life of the one-way valve, the filter and the exhaust fan, and thereby reduce the equipment maintenance and replacement cost.

[0019] Further, the heater comprises a shell and a heating element, the shell forms a cavity in the inside, the exhaust pipe passes through the cavity and communicates with the activated carbon canister, and the heating element is installed in the cavity, and the heating element is used to generate heat.

[0020] According to the above technical means, the heating element is installed in the inner cavity of the shell surrounding the exhaust pipe, which can heat the exhaust pipe in all directions, ensure that the heat is uniformly transmitted to the one-way valve, the filter and the exhaust fan and other components in the exhaust pipe, and the cavity formed by the shell accommodates the heating element and surrounds the exhaust pipe, so that the whole heating structure is compact and occupies small space, which does not increase the burden of additional installation space in the limited refueling trolley layout, which is beneficial to the miniaturization and integration design of the equipment.

[0021] Further, the heater further comprises a power supply assembly, the power supply assembly is installed on the shell, and the power supply assembly is connected with the heating element, and the power supply assembly is in communication connection with the control module, so that the control module opens or closes the power supply assembly, thereby starting or closing the heating element.

[0022] Based on the aforementioned technical means, the control module is communicatively connected to the power supply component. It can intelligently control the power supply component's on / off state according to the pressure signal within the fuel tank, thereby precisely starting or stopping the heating element. The heating element automatically starts in low temperatures or when the fuel tank pressure is abnormal; it shuts off promptly when the pressure returns to normal or the ambient temperature is suitable and heating is no longer required, achieving energy-efficient operation and avoiding unnecessary energy consumption. Furthermore, a stable power supply is fundamental for the normal operation of the heating element. The power supply component is directly mounted on the housing and tightly connected to the heating element, reducing line losses and the risk of failure, ensuring the heating element receives stable power, maintaining effective heating of the exhaust pipe and internal components, and guaranteeing stable operation of the exhaust system in low-temperature environments.

[0023] Furthermore, the heater also includes a heat-conducting element, which is mounted on the exhaust pipe to evenly distribute the heat generated by the heating element to the surrounding environment.

[0024] Based on the aforementioned technical means, the heat-conducting element can efficiently transfer the heat generated by the heating element to the exhaust pipe, greatly improving the heating efficiency and ensuring that the heat is rapidly and evenly distributed to all parts of the exhaust pipe, avoiding local overheating or insufficient heating, thereby effectively preventing component damage or performance degradation caused by uneven temperature; moreover, through the heat-conducting element, the heat can be evenly diffused to the surrounding environment, not only uniformly heating components such as one-way valves, filters and exhaust fans in the exhaust pipe, but also raising the temperature of the surrounding area to a certain extent, preventing fuel vapor from condensing on nearby pipes or components, and ensuring that the entire exhaust system can operate normally in low-temperature environments.

[0025] The beneficial effects of this utility model are:

[0026] By incorporating an exhaust pipe and exhaust assist components, fuel vapor can be promptly discharged, preventing excessive pressure buildup in the fuel tank and potential safety issues, thus significantly improving the safety of the refueling cart. Furthermore, stable fuel vapor pressure helps reduce pressure shocks and wear on the fuel tank and related fuel system components, thereby extending the overall lifespan of the refueling cart's fuel system. Secondly, the collaborative design of a pressure sensor, control module, and exhaust assist device enables real-time detection of fuel vapor pressure. The pressure sensor dynamically senses pressure changes within the fuel tank and transmits the signal to the control module. The control module then activates or deactivates the exhaust assist components in real time based on the pressure signal, ensuring efficient vapor discharge while avoiding excessive energy consumption. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the device of this utility model;

[0028] Figure 2 This is a cross-sectional view of the heater of this utility model.

[0029] Figure label:

[0030] 1-Fuel tank;

[0031] 2-Exhaust pipe

[0032] 3-Exhaust auxiliary components; 31-Activated carbon canister; 32-Exhaust fan; 33-One-way valve; 34-Filter; 35-Heater; 351-Housing; 352-Heating element; 353-Power supply assembly; 354-Heat-conducting element;

[0033] 4-Control module;

[0034] 5-Pressure sensor.

[0035] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0036] The embodiments of this utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be understood that the preferred embodiments are only for illustrating this utility model and not for limiting the scope of protection of this utility model.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0039] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0040] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0041] This embodiment provides an exhaust device specifically for refueling carts, such as... Figure 1 As shown, it includes: a fuel tank 1, an exhaust pipe 2, and an exhaust auxiliary assembly 3. The fuel tank 1 is connected to the exhaust auxiliary assembly 3 via the exhaust pipe 2, and fuel vapor in the fuel tank 1 is discharged through the exhaust auxiliary assembly 3; a control module 4, which is communicatively connected to the exhaust auxiliary assembly 3, and is used to control the opening or closing of the exhaust auxiliary assembly 3; and a pressure sensor 5, which is installed on the fuel tank 1 to monitor the fuel vapor pressure in the fuel tank 1. The pressure sensor 5 is communicatively connected to the control module 4, and the control module 4 controls the opening or closing of the exhaust auxiliary assembly 3 based on the pressure signal from the pressure sensor 5.

[0042] Preferably, the pressure sensor 5 is a piezoelectric pressure sensor. The piezoelectric pressure sensor is used for dynamic pressure measurement. The piezoelectric sensor has high sensitivity and high stability, and can achieve high-precision measurement and control, so that the pressure of fuel vapor in the fuel tank 1 can be monitored in real time, and the monitored pressure signal can be transmitted to the control module 4.

[0043] More preferably, the control module 4 adopts an electronic controller unit to control the driving status of the refueling cart and realize various functions, uses a piezoelectric pressure sensor to determine the pressure status in the fuel tank 1 and performs exhaust action through the exhaust auxiliary device 3.

[0044] By setting up the exhaust pipe 2 and the exhaust auxiliary component 3, fuel vapor can be discharged in a timely manner, preventing excessive pressure in the fuel tank 1 due to accumulation, which could lead to safety issues and greatly improve the safety of the refueling cart. Moreover, stable fuel vapor pressure helps reduce pressure shocks and wear on the fuel tank and related fuel system components, thereby extending the overall service life of the refueling cart's fuel system. Secondly, by introducing the coordinated design of the pressure sensor 5, control module 4, and exhaust auxiliary device 3, real-time detection of fuel vapor pressure is achieved. Among them, the pressure sensor 5 can dynamically sense pressure changes in the fuel tank 1 and transmit the signal to the control module 4. The control module 4 starts or stops the exhaust auxiliary component 3 in real time according to the pressure signal, ensuring efficient vapor discharge while avoiding excessive energy consumption.

[0045] like Figure 1 As shown, in this embodiment, the exhaust auxiliary component 3 includes an activated carbon canister 31, which is installed at the end of the exhaust pipe 2 and is used to absorb and purify the fuel vapor generated when refueling the fuel tank 1.

[0046] Preferably, the activated carbon canister 31 has an interface, and the activated carbon canister 31 is detachably installed on the end of the exhaust pipe 2 through the interface, so that air can enter the activated carbon canister 31 through the interface to purge the activated carbon, thereby restoring the absorption capacity of the activated carbon canister 31.

[0047] The activated carbon canister 31 absorbs fuel vapor, which helps maintain stable pressure within the fuel tank 1 to some extent, preventing excessive pressure caused by fuel vapor accumulation and reducing the risk of safety accidents such as fuel tank 1 rupture, thus ensuring the safe operation of the refueling vehicle. Secondly, by adsorbing and purifying fuel vapor, it reduces the emission of volatile organic compounds into the atmosphere, lowering environmental pollution and meeting environmental protection requirements. Simultaneously, the adsorbed fuel vapor can be reused for combustion under suitable conditions, avoiding fuel waste and achieving energy recovery.

[0048] like Figure 1 As shown, in this embodiment, the exhaust auxiliary component 3 also includes a one-way valve 32. The one-way valve 32 is installed on the exhaust pipe 2, and one end of the one-way valve 32 is connected to the fuel tank 1 through the exhaust pipe 2, while the other end of the one-way valve 32 is connected to the activated carbon canister 31.

[0049] The one-way valve 32 ensures that the fuel vapor generated during refueling of the fuel tank 1 can only flow from the fuel tank 1 to the activated carbon canister 31, preventing the fuel vapor from flowing back into the fuel tank 1 and maintaining a stable airflow direction, so that the activated carbon canister 31 can continuously and efficiently adsorb fuel vapor. Secondly, due to the one-way flow restriction of the one-way valve 32, it can prevent gas or impurities in the activated carbon canister 31 from entering the fuel tank 1 under abnormal conditions, avoiding contamination of the fuel and damage to the internal structure of the fuel tank 1 and the components of the fuel delivery system, thus extending the service life of the fuel tank 1 and related equipment.

[0050] like Figure 1 As shown, in this embodiment, the exhaust auxiliary component 3 also includes a filter 33, which is installed on the exhaust pipe 2, and the other end of the one-way valve 32 is connected to the activated carbon canister 31 through the filter 33, so that the filter 33 filters out impurities in the fuel vapor in the fuel tank 1.

[0051] The filter 33 effectively intercepts impurities, preventing the activated carbon canister 31 from becoming clogged or contaminated, extending its service life, ensuring the stable adsorption and storage of fuel vapor by the activated carbon canister 31, and maintaining the normal operation of the entire exhaust system. Secondly, the filter 33 removes impurities, allowing fuel vapor to flow smoothly from the fuel tank 1 through the exhaust pipe 2, one-way valve 32, and filter 33 to the activated carbon canister 31, ensuring the stability and reliability of gas flow within the fuel system, reducing system failures caused by impurities, such as pipe blockage and valve jamming, and improving the overall working stability of the fuel system in the refueling cart.

[0052] like Figure 1 As shown, in this embodiment, the filter 33 includes multiple layers of filter screens, and the pore size of the multiple layers of filter screens decreases sequentially along the direction from the one-way valve 32 to the activated carbon canister 31, so that the filter 33 filters impurities in the fuel vapor in the fuel tank 1.

[0053] The multi-layered filter design with progressively smaller pore sizes enables graded filtration of impurities of different particle sizes in fuel vapor, greatly improving the filtration effect and ensuring that the fuel vapor entering the activated carbon canister 31 is purer. Secondly, through graded filtration, impurities of different particle sizes are dispersed and intercepted by different layers of filter screens, avoiding rapid clogging of a single filter screen due to concentrated filtration of impurities of different sizes. This allows each layer of filter screen to maintain good filtration performance for a longer period of time, extending the replacement cycle of the filter screens in the entire filter 33 and reducing maintenance costs.

[0054] like Figure 1As shown, in this embodiment, the exhaust auxiliary component 3 also includes an exhaust fan 34, which is installed on the exhaust pipe 2. One end of the exhaust fan 34 is connected to the filter 33, and the other end of the exhaust fan 34 is connected to the activated carbon canister 31. The exhaust fan 34 is also connected to the control module 4 so that the control module 4 can turn the exhaust fan 34 on or off according to the pressure signal.

[0055] The exhaust fan 34 actively provides power to accelerate the flow of fuel vapor in the exhaust pipe 2, thereby quickly delivering the fuel vapor to the activated carbon canister 31. This ensures that the activated carbon canister 31 is continuously in contact with fresh fuel vapor to be treated, preventing local saturation of the adsorption area of ​​the activated carbon canister 31 due to slow fuel vapor flow. This improves the adsorption efficiency of the activated carbon canister 31 for volatile organic compounds in the fuel vapor, enhancing the overall purification capacity of the exhaust auxiliary component 3 for fuel vapor. Secondly, the exhaust fan 34 is communicatively connected to the control module 4. The control module 4 controls the opening and closing of the exhaust fan 34 based on the pressure signal transmitted from the pressure sensor 5. When the amount of fuel vapor generated is low and the pressure is low, the exhaust fan 34 is turned off to avoid unnecessary energy consumption. When the pressure rises to a set threshold, the exhaust fan 34 is activated to ensure timely exhaust, achieving intelligent and precise exhaust control that is both energy-saving and efficient.

[0056] like Figure 1 As shown, in this embodiment, the exhaust auxiliary component 3 further includes a heater 35, which is used to be sleeved on the outer periphery of the exhaust pipe 2. The one-way valve 32, filter 33 and exhaust fan 34 are all installed on the inner side of the exhaust pipe 2 covered by the heater 35, so that the heater 35 can uniformly heat the one-way valve 32, filter 33 and exhaust fan 34 in the exhaust pipe 2. The heater 35 is communicatively connected to the control module 4 so that the control module 4 can turn the heater 35 on or off according to the pressure signal.

[0057] The heater 35 is communicatively connected to the control module 4. The control module 4 controls the heater 35 to open or close based on the pressure signal from the pressure sensor 5, thereby maintaining the temperature of the fuel vapor in the exhaust pipe 2. This allows the exhaust auxiliary device 3 to continuously and efficiently deliver the fuel vapor to the activated carbon canister 31, improving the reliability and stability of the entire device. Secondly, the heater 35 can uniformly heat the one-way valve 32, filter 33, and exhaust fan 34 in the exhaust pipe 2, maintaining the component temperature and preventing fuel vapor condensation and related malfunctions caused by low temperatures. This ensures the exhaust system operates normally in cold environments, reduces damage to the one-way valve 32, filter 33, and exhaust fan 34 caused by low temperatures, extends the service life of the one-way valve 32, filter 33, and exhaust fan 34, and thus reduces equipment maintenance and replacement costs.

[0058] like Figure 2As shown, in this embodiment, the heater 35 includes a housing 351 and a heating element 352. A cavity is formed inside the housing 351, and the exhaust pipe 2 passes through the cavity and communicates with the activated carbon canister 31. The heating element 352 is installed inside the cavity and is used to generate heat.

[0059] The heating element 352 is installed in the inner cavity of the housing 351 surrounding the exhaust pipe 2, which can heat the exhaust pipe 2 from all directions and ensure that the heat is evenly transferred to the one-way valve 32, filter 33 and exhaust fan 34 and other components in the exhaust pipe 2. The cavity formed by the housing 351 accommodates the heating element 352 and surrounds the exhaust pipe 2, making the entire heating structure compact and occupying little space. In the limited layout of the refueling cart, it will not add too much extra installation space burden, which is conducive to the miniaturization and integration design of the equipment.

[0060] like Figure 2 As shown, in this embodiment, the heater 35 also includes a power supply component 353, which is mounted on the housing 351 and connected to the heating element 352. The power supply component 353 is communicatively connected to the control module 4 so that the control module 4 can turn the power supply component 353 on or off, thereby starting or turning off the heating element 352.

[0061] The control module 2 is communicatively connected to the power supply component 353. Based on the pressure signal inside the fuel tank 1, it can intelligently control the opening and closing of the power supply component 353, thereby precisely starting or stopping the heating element 352. When the temperature is low or the pressure in the fuel tank 1 is abnormal, the heating element 352 is automatically started. When the pressure returns to normal or the ambient temperature is suitable and heating is no longer required, it is shut off in time, achieving energy-saving and efficient operation and avoiding unnecessary energy consumption. Furthermore, a stable power supply is the basis for the normal operation of the heating element 352. The power supply component 353 is directly installed on the housing 351 and is closely connected to the heating element 352, reducing line loss and failure risk, ensuring that the heating element 352 can stably obtain power, maintaining effective heating of the exhaust pipe 2 and internal components, and ensuring stable operation of the exhaust system in low-temperature environments.

[0062] like Figure 2 As shown, in this embodiment, the heater 35 further includes a heat-conducting element 354, and the heating element 352 is mounted on the exhaust pipe 2 through the heat-conducting element 354 to distribute the heat generated by the heating element 352 evenly to the surrounding environment.

[0063] The heat-conducting element 354 can efficiently transfer the heat generated by the heating element 352 to the exhaust pipe 2, greatly improving the heating efficiency and ensuring that the heat is quickly and evenly distributed to all parts of the exhaust pipe 2, avoiding local overheating or insufficient heating, thereby effectively preventing component damage or performance degradation caused by uneven temperature; moreover, through the heat-conducting element 354, the heat can be evenly diffused to the surrounding environment, not only uniformly heating the one-way valve 32, filter 33 and exhaust fan 34 in the exhaust pipe 2, but also raising the temperature of the surrounding area to a certain extent, preventing fuel vapor from condensing on nearby pipes or components, and ensuring that the entire exhaust system can operate normally in low-temperature environments.

[0064] The above embodiments are merely preferred embodiments provided to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present utility model are all within the protection scope of the present utility model.

Claims

1. An exhaust device specifically designed for refueling carts, characterized in that, include: The fuel tank (1), exhaust pipe (2) and exhaust auxiliary assembly (3) are provided. The fuel tank (1) is connected to the exhaust auxiliary assembly (3) through the exhaust pipe (2). Fuel vapor in the fuel tank (1) is discharged through the exhaust auxiliary assembly (3). The control module (4) is communicatively connected to the exhaust auxiliary component (3) and is used to control the opening or closing of the exhaust auxiliary component (3). A pressure sensor (5) is installed on the fuel tank (1) to monitor the fuel vapor pressure inside the fuel tank (1); the pressure sensor (5) is communicatively connected to the control module (4), and the control module (4) controls the opening or closing of the exhaust auxiliary component (3) according to the pressure signal of the pressure sensor (5).

2. The exhaust device specifically designed for refueling carts according to claim 1, characterized in that, The exhaust auxiliary component (3) includes an activated carbon canister (31), which is installed at the end of the exhaust pipe (2) and is used to absorb and purify the fuel vapor generated when the fuel tank (1) is refueled.

3. The exhaust device specifically designed for refueling carts according to claim 2, characterized in that, The exhaust assist assembly (3) also includes a one-way valve (32), which is installed on the exhaust pipe (2). One end of the one-way valve (32) is connected to the fuel tank (1) through the exhaust pipe (2), and the other end of the one-way valve (32) is connected to the activated carbon canister (31).

4. The exhaust device specifically designed for refueling carts according to claim 3, characterized in that, The exhaust assist assembly (3) also includes a filter (33), which is installed on the exhaust pipe (2), and the other end of the one-way valve (32) is connected to the activated carbon canister (31) through the filter (33) so that the filter (33) filters out impurities in the fuel vapor in the fuel tank (1).

5. An exhaust device specifically for a refueling cart according to claim 4, characterized in that, The filter (33) includes multiple layers of filter screens, the pore size of which decreases sequentially along the direction from the one-way valve (32) to the activated carbon canister (31), so that the filter (33) filters impurities in the fuel vapor in the fuel tank (1).

6. The exhaust device specifically designed for refueling carts according to claim 4, characterized in that, The exhaust auxiliary component (3) also includes an exhaust fan (34), which is installed on the exhaust pipe (2). One end of the exhaust fan (34) is connected to the filter (33), and the other end of the exhaust fan (34) is connected to the activated carbon canister (31). The exhaust fan (34) is also connected to the control module (4) so ​​that the control module (4) can turn the exhaust fan (34) on or off according to the pressure signal.

7. An exhaust device specifically for a refueling vehicle according to claim 6, characterized in that, The exhaust auxiliary assembly (3) further includes a heater (35), which is used to be fitted around the outer periphery of the exhaust pipe (2), and the one-way valve (32), the filter (33) and the exhaust fan (34) are all installed on the inner side of the exhaust pipe (2) covered by the heater (35), so that the heater (35) can uniformly heat the one-way valve (32), the filter (33) and the exhaust fan (34) inside the exhaust pipe (2); the heater (35) is communicatively connected to the control module (4) so ​​that the control module (4) can turn the heater (35) on or off according to the pressure signal.

8. An exhaust device specifically for a refueling vehicle according to claim 7, characterized in that, The heater (35) includes a housing (351) and a heating element (352). A cavity is formed inside the housing (351). The exhaust pipe (2) passes through the cavity and is connected to the activated carbon canister (31). The heating element (352) is installed inside the cavity and is used to generate heat.

9. An exhaust device specifically for a refueling vehicle according to claim 8, characterized in that, The heater (35) further includes a power supply assembly (353), which is mounted on the housing (351) and connected to the heating element (352). The power supply assembly (353) is communicatively connected to the control module (4) so ​​that the control module (4) can turn the power supply assembly (353) on or off, thereby starting or stopping the heating element (352).

10. An exhaust device specifically for a refueling vehicle according to claim 9, characterized in that, The heater (35) further includes a heat-conducting element (354), and the heating element (352) is mounted on the exhaust pipe (2) through the heat-conducting element (354) to distribute the heat generated by the heating element (352) evenly to the surrounding environment.

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