Quantitative filling device and method

Abstract

The embodiment of the invention discloses a quantitative filling device and method. A control module of the quantitative filling device enables liquefied gas stored in a gas storage module to circulate in a circulating pipeline by controlling a throttling adjusting module and a temperature and pressure adjusting module, and adjusts the temperature of the liquefied gas; when the temperature of the liquefied gas is reduced to a first temperature threshold value, the control module controls the throttling adjusting module and the temperature and pressure adjusting module to adjust the pressure of the liquefied gas in the inflation channel, and the inflation amount of the high-pressure gas cylinder is controlled through the throttling adjusting module according to the flow data; or the control module controls the throttling adjusting module and the temperature and pressure adjusting module to adjust the circulating pressure of the liquefied gas in the circulating pipeline when the temperature of the liquefied gas is reduced to the first temperature threshold value, and controls the throttling adjusting module to conduct the inflation channel when the pressure of the liquefied gas changes within the first pressure range threshold value; and when the inflation channel is opened, the inflation volume of the high-pressure gas cylinder is controlled through the throttling adjusting module according to the flow data.

Description

Technical Field

[0001] The present invention relates to the field of inflation technology, and in particular to a quantitative filling device and method. Background Technology

[0002] In the industrial filling process of liquefied gases (such as liquefied petroleum gas, liquid nitrogen, and liquid carbon dioxide), the accuracy of quantitative filling directly affects product safety, process parameters, cost control, and regulatory compliance. Current mainstream methods rely on mechanical weighing, pressure sensors, or flow meter accumulation. However, factors such as flow pulsation from the delivery pump, pipeline resistance losses, temperature inhomogeneity, sudden pressure fluctuations, and changes in medium state lead to unstable gas states and large instantaneous flow fluctuations during filling, resulting in significant filling volume errors and failing to meet the requirements for precise filling. Alternatively, the filling volume can be calculated by real-time acquisition of the high-pressure cylinder's weight. However, the complex structure of high-pressure filling mechanisms and numerous external auxiliary components prevent individual weighing of the high-pressure cylinder, leading to large overall weighing errors. Furthermore, the rigid high-pressure hoses connecting the high-pressure cylinder to external components affect weighing, failing to accurately reflect the cylinder's actual weight. Combined with the flow pulsation caused by the delivery pump, the accuracy of the filling volume cannot be guaranteed. Summary of the Invention

[0003] This invention provides a quantitative filling device and method to improve the accuracy of inflation volume.

[0004] In a first aspect, embodiments of the present invention provide a quantitative filling device, which includes a gas storage module, a temperature and pressure regulation module, a flow monitoring module, a control module, a throttling regulation module, and a high-pressure gas cylinder;

[0005] The temperature and pressure regulation module, the flow monitoring module, and the throttling regulation module are all connected to the control module;

[0006] The outlet of the gas storage module, the temperature and pressure regulation module, the flow monitoring module, the inlet of the throttling regulation module, the first outlet of the throttling regulation module, and the inlet of the gas storage module are connected in sequence to form a circulation pipeline; the outlet of the gas storage module, the temperature and pressure regulation module, the flow monitoring module, the inlet of the throttling regulation module, the second outlet of the throttling regulation module, and the high-pressure gas cylinder are connected in sequence to form a gas filling channel;

[0007] The flow monitoring module is used to detect and record the flow data of the circulation pipe and the inflation channel;

[0008] The control module is used to control the throttling adjustment module and the temperature and pressure adjustment module to circulate the liquefied gas stored in the gas storage module in the circulation pipeline and to adjust the temperature of the liquefied gas.

[0009] The control module is used to control the throttling module and the temperature-pressure regulation module to adjust the pressure of the liquefied gas in the filling channel when the temperature of the liquefied gas drops to a first temperature threshold. Simultaneously, it controls the filling volume of the high-pressure gas cylinder through the throttling module based on the flow rate data; or...

[0010] The control module is used to control the throttling module and the temperature and pressure regulating module to adjust the pressure of the liquefied gas circulating in the circulation pipeline when the temperature of the liquefied gas drops to a first temperature threshold; to control the throttling module to open the gas filling channel when the pressure of the liquefied gas changes within a first pressure range threshold; and to control the gas filling amount of the high-pressure gas cylinder through the throttling module according to the flow data when the gas filling channel is open.

[0011] Optionally, the temperature and pressure regulation module includes a temperature regulation unit and a pressure regulation unit;

[0012] The outlet of the gas storage module is connected to the inlet of the temperature regulating unit, the outlet of the temperature regulating unit is connected to the inlet of the pressure regulating unit, and the outlet of the pressure regulating unit is connected to the flow monitoring module.

[0013] Both the temperature regulating unit and the pressure regulating unit are connected to the control module;

[0014] The control module is used to control the temperature regulating unit to adjust the temperature of the liquefied gas in the circulation pipe and the inflation channel, and to control the pressure regulating unit to adjust the pressure in the circulation pipe and the inflation channel.

[0015] Optionally, the pressure regulating unit includes a booster pump, a pressure stabilizing tank, a temperature sensor, and a pressure sensor;

[0016] The inlet of the booster pump serves as the inlet of the pressure regulating unit, the outlet of the booster pump is connected to the inlet of the pressure stabilizing tank, and the outlet of the pressure stabilizing tank serves as the outlet of the pressure regulating unit.

[0017] Both the temperature sensor and the pressure sensor are mounted on the pressure stabilizing tank, and the booster pump, the temperature sensor, and the pressure sensor are all connected to the control module.

[0018] The control module is used to control the booster pump to adjust the pressure of the liquefied gas circulating in the gas filling channel or the circulation pipe, control the temperature sensor to detect the temperature of the liquefied gas, and control the pressure sensor to detect the pressure of the liquefied gas.

[0019] Optionally, the temperature control unit includes a cooler; the flow monitoring module includes a flow meter.

[0020] The inlet of the cooler serves as the inlet of the temperature regulating unit, and the outlet of the cooler serves as the outlet of the temperature regulating unit.

[0021] The cooler is used to cool the liquefied gas so that the liquefied gas remains in a liquid state.

[0022] The first port of the flow meter serves as the inlet of the flow monitoring module, and the second port of the flow meter serves as the outlet of the flow monitoring module.

[0023] Optionally, the throttling control module includes a first flow regulator and a second flow regulator;

[0024] The first port of the first flow regulator and the first port of the second flow regulator are connected and serve as the inlet of the throttling control module. The second port of the first flow regulator serves as the first outlet of the throttling control module, and the second port of the second flow regulator serves as the second outlet.

[0025] Optionally, the throttling control module includes a first shut-off valve, a second shut-off valve, a third flow regulator, and a fourth flow regulator;

[0026] The first port of the first shut-off valve is connected to the first port of the second shut-off valve and serves as the inlet of the throttling regulating module. The second port of the first shut-off valve is connected to the first port of the third flow regulator. The second port of the second shut-off valve is connected to the first port of the fourth flow regulator. The second port of the third flow regulator serves as the first outlet of the throttling regulating module, and the second port of the fourth flow regulator serves as the second outlet of the throttling regulating module.

[0027] Optionally, the throttling control module includes a fifth flow regulator, a sixth flow regulator, and a three-way valve;

[0028] The first port of the three-way valve serves as the inlet of the throttling regulating module. The second port of the three-way valve is connected to the first port of the fifth flow regulator. The third port of the three-way valve is connected to the first port of the sixth flow regulator. The second port of the fifth flow regulator serves as the first outlet of the throttling regulating module. The second port of the sixth flow regulator serves as the second outlet of the throttling regulating module.

[0029] Secondly, embodiments of the present invention also provide a quantitative filling method, performed using the quantitative filling device provided in any embodiment of the present invention, the quantitative filling method comprising:

[0030] The flow monitoring module detects and records the flow data of the circulation pipe and the inflation channel;

[0031] The control module controls the throttling adjustment module and the temperature and pressure adjustment module to circulate the liquefied gas stored in the gas storage module in the circulation pipeline and adjusts the temperature of the liquefied gas.

[0032] When the temperature of the liquefied gas drops to a first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas in the filling channel. Simultaneously, based on the flow rate data, the throttling adjustment module controls the filling volume of the high-pressure gas cylinder; or...

[0033] When the temperature of the liquefied gas drops to a first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module controls the throttling adjustment module to open the filling channel. When the filling channel is open, the control module controls the filling amount of the high-pressure gas cylinder according to the flow data.

[0034] Optionally, the temperature and pressure regulation module includes a temperature regulation unit and a pressure regulation unit;

[0035] The pressure regulating unit includes a booster pump, a pressure stabilizing tank, a temperature sensor, and a pressure sensor; the temperature regulating unit includes a cooler; and the throttling regulating module includes a first flow regulator and a second flow regulator.

[0036] The outlet of the gas storage module, the cooler, the booster pump, the pressure stabilizing tank, the flow monitoring module, the first flow regulator, and the inlet of the gas storage module are connected in sequence to form a circulation pipeline; the outlet of the gas storage module, the cooler, the booster pump, the pressure stabilizing tank, the flow monitoring module, the second flow regulator, and the high-pressure gas cylinder are connected in sequence to form a gas filling channel.

[0037] The control module controls the throttling module and the temperature and pressure regulating module to circulate the liquefied gas stored in the gas storage module within the circulation pipeline, and regulates the temperature of the liquefied gas, including:

[0038] Control the opening degree of the first flow regulator to a first opening degree threshold or a full opening threshold;

[0039] The booster pump is started to control the liquefied gas to circulate in the circulation pipeline, and the cooler is started to regulate the temperature of the liquefied gas;

[0040] The control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas in the inflation channel, including:

[0041] The first flow regulator is controlled to close, the second flow regulator is controlled to open to a second opening threshold, the booster pump is controlled to stop when the pressure fed back by the pressure sensor is greater than a first pressure threshold, and the booster pump is controlled to start when the pressure fed back by the pressure sensor is equal to the second pressure threshold; wherein, the first opening threshold is greater than the second opening threshold.

[0042] The control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module controls the throttling adjustment module to open the gas filling channel, including:

[0043] The opening degree of the first flow regulator is controlled to the second opening threshold. When the pressure fed back by the pressure sensor is greater than the first pressure threshold, the booster pump is controlled to stop. When the pressure fed back by the pressure sensor is equal to the second pressure threshold, the booster pump is controlled to start.

[0044] When the pressure fed back by the pressure sensor changes within a first pressure range threshold, the first flow regulator is controlled to close, and the opening degree of the second flow regulator is controlled to the second opening threshold.

[0045] Optionally, the temperature and pressure regulation module includes a temperature regulation unit and a pressure regulation unit;

[0046] The pressure regulating unit includes a booster pump, a pressure stabilizing tank, a temperature sensor, and a pressure sensor; the temperature regulating unit includes a cooler; and the throttling regulating module includes a first shut-off valve, a second shut-off valve, a third flow regulator, and a fourth flow regulator.

[0047] The outlet of the gas storage module, the cooler, the booster pump, the pressure stabilizing tank, the flow monitoring module, the first shut-off valve, the third flow regulator, and the inlet of the gas storage module are connected in sequence to form a circulation pipeline; the outlet of the gas storage module, the cooler, the booster pump, the pressure stabilizing tank, the flow monitoring module, the second shut-off valve, the fourth flow regulator, and the high-pressure gas cylinder are connected in sequence to form a gas filling channel;

[0048] The control module controls the throttling module and the temperature and pressure regulating module to circulate the liquefied gas stored in the gas storage module within the circulation pipeline, and regulates the temperature of the liquefied gas, including:

[0049] The first shut-off valve is opened, the second shut-off valve is closed, the opening degree of the third flow regulator is set to the full opening threshold, and the opening degree of the fourth flow regulator is set to the second opening threshold.

[0050] The booster pump is started to control the liquefied gas to circulate in the circulation pipeline, and the cooler is started to regulate the temperature of the liquefied gas;

[0051] The control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module controls the throttling adjustment module to open the gas filling channel, including:

[0052] Control the opening degree of the third flow regulator to the second opening degree threshold, control the booster pump to stop when the pressure fed back by the pressure sensor is greater than the first pressure threshold, and control the booster pump to start when the pressure fed back by the pressure sensor is equal to the second pressure threshold;

[0053] When the pressure fed back by the pressure sensor changes within a first pressure range threshold, the first shut-off valve is controlled to close, and the second shut-off valve is controlled to open.

[0054] In this embodiment of the invention, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to circulate the liquefied gas stored in the gas storage module within the circulation pipeline and regulates the temperature of the liquefied gas. When the temperature of the liquefied gas drops to a first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas in the filling channel. Simultaneously, based on flow data, the control module controls the filling amount of the high-pressure gas cylinder through the throttling adjustment module. Alternatively, when the temperature of the liquefied gas drops to the first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module opens the filling channel, and when the filling channel is open, the control module controls the filling amount of the high-pressure gas cylinder based on flow data through the throttling adjustment module. Therefore, the quantitative filling device provided by this embodiment of the invention can improve the accuracy of the filling amount. Attached Figure Description

[0055] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 A schematic diagram of the structure of an inflation system provided for the prior art;

[0057] Figure 2 This is a schematic diagram of the structure of a quantitative filling device provided in an embodiment of the present invention;

[0058] Figure 3 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention;

[0059] Figure 4 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention;

[0060] Figure 5 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention;

[0061] Figure 6 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention;

[0062] Figure 7 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention;

[0063] Figure 8 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention;

[0064] Figure 9 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention;

[0065] Figure 10 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention;

[0066] Figure 11 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention;

[0067] Figure 12 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention. Detailed Implementation

[0068] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0069] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0070] Figure 1 A schematic diagram of the structure of an inflation system provided for the prior art, such as Figure 1 As shown, the inflation system includes a storage tank 111, a booster pump 1221, a flow meter 131, a throttle valve 170, a PLC 141, and a high-pressure gas cylinder 160.

[0071] Storage tank 111, booster pump 1221, flow meter 131, throttle valve 170 and high-pressure gas cylinder 160 are connected in sequence. Booster pump 1221, flow meter 131 and throttle valve 170 are all connected to PLC 141. Flow meter 131 is used to detect the gas filling flow and feeds back the detected flow signal to PLC 141. PLC 141 controls booster pump 1221 to output the gas stored in storage tank 111 to high-pressure gas cylinder 160 based on the feedback cumulative flow signal.

[0072] Existing inflation systems typically use flow meter 131 to collect cumulative flow signals and feed them back to booster pump 1221 for inflation. However, due to factors such as flow pulsation in booster pump 1221, pipeline resistance losses, temperature inhomogeneity, sudden pressure increases and decreases, and changes in medium state, the gas state becomes unstable, resulting in large fluctuations in instantaneous inflation flow. This leads to significant inflation errors determined by the cumulative flow signals collected by flow meter 131, failing to meet inflation accuracy requirements.

[0073] Another method calculates the inflation volume by real-time measurement of the weight of the high-pressure gas cylinder 160. However, due to the complex structure of the high-pressure inflation mechanism and the numerous auxiliary components, the high-pressure gas cylinder 160 cannot be weighed independently, resulting in a large overall weighing error. Furthermore, the rigid high-pressure hose connecting the high-pressure gas cylinder 160 to the external system affects the weighing, making it impossible to accurately reflect the actual weight of the cylinder. In addition, the flow rate fluctuations caused by the booster pump 1221 further complicate the accuracy of the inflation volume calculation.

[0074] To address the aforementioned problems, embodiments of the present invention provide a quantitative filling device to improve the accuracy of the inflation volume. Figure 2 This is a schematic diagram of the structure of a quantitative filling device provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the quantitative filling device includes a gas storage module 110, a temperature and pressure regulation module 120, a flow monitoring module 130, a control module 140, a throttling regulation module 150, and a high-pressure gas cylinder 160.

[0075] The temperature and pressure regulation module 120, the flow monitoring module 130, and the throttling regulation module 150 are all connected to the control module 140;

[0076] The outlet of the gas storage module 110, the temperature and pressure regulation module 120, the flow monitoring module 130, the inlet of the throttling regulation module 150, the first outlet of the throttling regulation module 150, and the inlet of the gas storage module 110 are connected in sequence to form a circulation pipeline; the outlet of the gas storage module 110, the temperature and pressure regulation module 120, the flow monitoring module 130, the inlet of the throttling regulation module 150, the second outlet of the throttling regulation module 150, and the high-pressure gas cylinder 160 are connected in sequence to form a gas filling channel;

[0077] The flow monitoring module 130 is used to detect and record the flow data of the circulation pipe and the inflation channel;

[0078] The control module 140 is used to control the throttling adjustment module 150 and the temperature and pressure adjustment module 120 to make the liquefied gas stored in the gas storage module 110 circulate in the circulation pipeline and to adjust the temperature of the liquefied gas.

[0079] Control module 140 is used to control throttling module 150 and temperature and pressure regulating module 120 to adjust the pressure of liquefied gas in the filling channel when the temperature of the liquefied gas drops to a first temperature threshold. Simultaneously, it controls the filling amount of high-pressure cylinder 160 through throttling module 150 based on flow data; or...

[0080] The control module 140 is used to control the throttling adjustment module 150 and the temperature and pressure adjustment module 120 to adjust the pressure of the liquefied gas circulating in the circulation pipeline when the temperature of the liquefied gas drops to the first temperature threshold. When the pressure of the liquefied gas changes within the first pressure range threshold, the control module 140 controls the throttling adjustment module 150 to open the gas filling channel. When the gas filling channel is open, the control module 140 controls the gas filling amount of the high-pressure gas cylinder 160 according to the flow data.

[0081] The gas storage module 110, which includes a storage tank 111, is used to store liquefied gas. The temperature and pressure regulation module 120 can regulate the pressure and temperature of the liquefied gas flowing in the filling channel and circulation pipeline. The flow monitoring module 130 is used to detect and record the flow data of the circulation pipeline and filling channel. The control module 140 is the control center of the entire quantitative filling device, used to control the coordinated operation of the temperature and pressure regulation module 120, the flow monitoring module 130, and the throttling regulation module 150 to achieve precise filling of the high-pressure gas cylinder 160.

[0082] The working process of the quantitative filling device is described as follows: The flow monitoring module 130 detects and records the flow data of the circulation pipeline and the filling channel in real time, and feeds back the flow data of liquefied gas in the circulation pipeline and the filling channel to the control module 140. The control module 140 can determine the flow fluctuation of liquefied gas based on the flow data of liquefied gas in the circulation pipeline, and determine the filling amount of high-pressure gas cylinder 160 based on the flow data of liquefied gas in the filling channel. Specifically, the control module 140 controls the throttling adjustment module 150 to circulate the liquefied gas stored in the gas storage module 110 in the circulation pipeline, and discharges the gaseous gas in the circulation pipeline to the gas storage module 110, so that the circulation pipeline is filled with liquefied gas. The control module 140 lowers the temperature of the liquefied gas through the temperature and pressure adjustment module 120 to keep the liquefied gas circulating in the circulation pipeline stably in a liquid state.

[0083] In one embodiment, when the temperature of the liquefied gas drops to a first temperature threshold, the control module 140 controls the throttling adjustment module 150 to regulate the flow of the liquefied gas in the filling channel, and controls the temperature and pressure adjustment module 120 to maintain the pressure of the liquefied gas in the filling channel within a certain range. When the gas flows through the filling channel, the control module 140 calculates the filling amount of the high-pressure gas cylinder 160 based on the flow data. When the filling amount of the high-pressure gas cylinder 160 reaches the preset filling amount, the control module 150 is used to shut off the filling channel to stop the filling of the high-pressure gas cylinder 160.

[0084] In another embodiment, when the temperature of the liquefied gas drops to a first temperature threshold, the control module 140 adjusts the pressure of the liquefied gas circulating in the circulation pipeline by controlling the throttling adjustment module 150 and the temperature and pressure adjustment module 120. When the pressure of the liquefied gas changes within the first pressure range threshold, the control module 140 controls the throttling adjustment module 150 to open the inflation channel. When the inflation channel is open, the control module 150 controls the inflation amount of the high-pressure gas cylinder 160 according to the flow data. When the inflation amount of the high-pressure gas cylinder 160 reaches the preset inflation amount, the control module 150 closes the inflation channel to stop the inflation of the high-pressure gas cylinder 160.

[0085] In this embodiment of the invention, the control module 140 controls the throttling adjustment module 150 and the temperature and pressure adjustment module 120 to circulate the liquefied gas stored in the gas storage module 110 within the circulation pipeline and adjusts the temperature of the liquefied gas. When the temperature of the liquefied gas drops to a first temperature threshold, the control module 140 controls the throttling adjustment module 150 and the temperature and pressure adjustment module 120 to adjust the pressure of the liquefied gas in the filling channel. Simultaneously, based on flow data, the control module 140 controls the filling amount of the high-pressure gas cylinder 160 via the throttling adjustment module 150. Alternatively, when the temperature of the liquefied gas drops to the first temperature threshold, the control module 140 controls the throttling adjustment module 150 and the temperature and pressure adjustment module 120 to adjust the pressure of the liquefied gas circulating within the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module 140 controls the throttling adjustment module 150 to open the filling channel, and when the filling channel is open, the control module 140 controls the filling amount of the high-pressure gas cylinder 160 via the throttling adjustment module 150 based on flow data. Therefore, the quantitative filling device provided in this embodiment of the invention can improve the accuracy of the filling amount.

[0086] Based on the above embodiments, optionally, Figure 3 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the temperature and pressure regulation module 120 includes a temperature regulation unit 121 and a pressure regulation unit 122;

[0087] The outlet of the gas storage module 110 is connected to the inlet of the temperature regulation unit 121, the outlet of the temperature regulation unit 121 is connected to the inlet of the pressure regulation unit 122, and the outlet of the pressure regulation unit 122 is connected to the flow monitoring module 130; both the temperature regulation unit 121 and the pressure regulation unit 122 are connected to the control module 140.

[0088] The control module 140 is used to control the temperature regulating unit 121 to regulate the temperature of the liquefied gas in the circulation pipe and the inflation channel, and to control the pressure regulating unit 122 to regulate the pressure in the circulation pipe and the inflation channel.

[0089] The pressure regulating unit 122 regulates the pressure in the circulation pipe and the inflation channel to keep the gas flowing in the circulation pipe and the inflation channel in a liquid state.

[0090] Based on the above embodiments, optionally, Figure 4 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the pressure regulating unit 122 includes a booster pump 1221, a pressure stabilizing tank 1222, a temperature sensor 1223, and a pressure sensor 1224;

[0091] The inlet of the booster pump 1221 serves as the inlet of the pressure regulating unit 122. The outlet of the booster pump 1221 is connected to the inlet of the pressure stabilizing tank 1222, and the outlet of the pressure stabilizing tank 1222 serves as the outlet of the pressure regulating unit 122. The temperature sensor 1223 and the pressure sensor 1224 are both mounted on the pressure stabilizing tank 1222. The booster pump 1221, the temperature sensor 1223, and the pressure sensor 1224 are all connected to the control module 140.

[0092] The control module 140 is used to control the booster pump 1221 to adjust the pressure of the liquefied gas circulating in the gas filling channel or circulation pipeline, control the temperature sensor 1223 to detect the temperature of the liquefied gas, and control the pressure sensor 1224 to detect the pressure of the liquefied gas.

[0093] Specifically, when the flow rate of liquefied gas drawn by the booster pump 1221 is greater than the flow rate of liquefied gas in the filling channel or circulation pipeline, the operating time of the booster pump 1221 is controlled to maintain the liquefied gas in the pressure stabilizing tank 1222 within a certain pressure range, thereby achieving pressure regulation of the liquefied gas circulating in the filling channel or circulation pipeline.

[0094] Based on the above embodiments, optionally, continuing with reference to 4, the temperature regulating unit 121 includes a cooler 1211; the flow monitoring module 130 includes a flow meter 131; the inlet of the cooler 1211 serves as the inlet of the temperature regulating unit 121, and the outlet of the cooler 1211 serves as the outlet of the temperature regulating unit 121; the cooler 1211 is used to cool the liquefied gas so that the liquefied gas remains in a liquid state; the first port of the flow meter 131 serves as the inlet of the flow monitoring module 130, and the second port of the flow meter 131 serves as the outlet of the flow monitoring module 130.

[0095] In addition, the cooler 1211 can also be installed on the outer wall of the storage tank 111. That is, the cooler is installed on the outer wall of the storage tank 111 through an outer jacket or an inner coil to cool the liquefied gas in the storage tank 111 so that the liquefied gas is kept in a liquid state.

[0096] Based on the above embodiments, optionally, referring to 4, the control module 140 includes a PLC; the cooler 1211, booster pump 1221, temperature sensor 1223, pressure sensor 1224, flow meter 131 and throttling adjustment module 150 are all connected to the PLC.

[0097] Based on the above embodiments, optionally, Figure 5 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention, as shown below. Figure 5 As shown, the throttling control module 150 includes a first flow regulator 151 and a second flow regulator 152;

[0098] The first port of the first flow regulator 151 is connected to the first port of the second flow regulator 152 and serves as the inlet of the throttling control module 150. The second port of the first flow regulator 151 serves as the first outlet of the throttling control module 150, and the second port of the second flow regulator 152 serves as the second outlet.

[0099] Specifically, based on the above connection relationships, the working process of the quantitative filling device is described as follows:

[0100] One inflation method is as follows: the control module 140 controls the opening degree of the first flow regulator 151 to the first opening degree threshold, starts the booster pump 1221 to control the liquefied gas to circulate in the circulation pipe to discharge the gaseous gas in the circulation pipe to the storage tank 111, and starts the cooler 1211 to adjust the temperature of the liquefied gas so that the liquefied gas circulating in the circulation pipe is stably maintained in a liquid state. When the temperature of the liquefied gas drops to the first temperature threshold, the control module 140 controls the first flow regulator 151 to close and controls the opening of the second flow regulator 152 to the second opening threshold. At this time, the opening of the second flow regulator 152 is less than the opening of the first flow regulator 151, so that the flow rate in the filling pipe is less than the flow rate of the booster pump 1221. Thus, the pressure of the liquefied gas in the filling channel can be adjusted by controlling the start and stop of the booster pump 1221. That is, when the pressure fed back by the pressure sensor 1224 is greater than the first pressure threshold, the booster pump 1221 is controlled to stop, and when the pressure fed back by the pressure sensor 1224 is equal to the second pressure threshold, the booster pump 1221 is controlled to start. When the second flow regulator 152 opens the filling channel, the flow data is accumulated. When the filling capacity of the high-pressure gas cylinder 160 reaches the preset filling capacity, the filling channel is closed by controlling the throttling adjustment module 150 to stop the filling of the high-pressure gas cylinder 160.

[0101] Another inflation method is as follows: the control module 140 controls the opening degree of the first flow regulator 151 to the full opening threshold, starts the booster pump 1221 to control the liquefied gas to circulate in the circulation pipe to discharge the gaseous gas in the circulation pipe to the storage tank 111, and starts the cooler 1211 to adjust the temperature of the liquefied gas so that the liquefied gas circulating in the circulation pipe is stably maintained in a liquid state. When the temperature of the liquefied gas drops to the first temperature threshold, the control module 140 controls the opening of the first flow regulator 151 to the second opening threshold. When the pressure fed back by the pressure sensor 1224 is greater than the first pressure threshold, the control module 140 controls the booster pump 1221 to stop. When the pressure fed back by the pressure sensor 1224 is equal to the second pressure threshold, the control module 140 controls the booster pump 1221 to start. When the pressure fed back by the pressure sensor 1224 changes within the first pressure range threshold, the control module 140 controls the first flow regulator 151 to close and controls the opening of the second flow regulator 152 to the second opening threshold. At the same time, when the second flow regulator 152 opens the filling channel, the flow data is accumulated. When the filling capacity of the high-pressure gas cylinder 160 reaches the preset filling capacity, the control module 150 is used to close the filling channel to stop the filling of the high-pressure gas cylinder 160.

[0102] Based on the above embodiments, optionally, Figure 6 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the throttling control module 150 includes a first shut-off valve 153, a second shut-off valve 154, a third flow regulator 155, and a fourth flow regulator 156.

[0103] The first port of the first shut-off valve 153 and the first port of the second shut-off valve 154 are connected and serve as the inlet of the throttling regulating module 150. The second port of the first shut-off valve 153 is connected to the first port of the third flow regulator 155. The second port of the second shut-off valve 154 is connected to the first port of the fourth flow regulator 156. The second port of the third flow regulator 155 serves as the first outlet of the throttling regulating module 150, and the second port of the fourth flow regulator 156 serves as the second outlet of the throttling regulating module 150.

[0104] Specifically, based on the above connection relationship, the working process of the quantitative filling device is described as follows: Control module 140 controls the first shut-off valve 153 to open, the second shut-off valve 154 to close, the third flow regulator 155 to open to the full-open threshold, and the fourth flow regulator 156 to open to the second opening threshold; control module 140 starts booster pump 1221 to control the liquefied gas to circulate in the circulation pipeline, and starts cooler 1211 to regulate the temperature of the liquefied gas. When the temperature of the liquefied gas drops to the first temperature threshold, control module 140 controls the opening of the third flow regulator 155 to the second opening threshold; when the pressure fed back by pressure sensor 1224 is greater than the first pressure threshold, control booster pump 1221 to stop; when the pressure fed back by pressure sensor 1224 is equal to the second pressure threshold, control booster pump 1221 to start; when the pressure fed back by pressure sensor 1224 changes within the first pressure range threshold, control module 140 controls the first shut-off valve 153 to close and controls the second shut-off valve 154 to open. Meanwhile, the control module 140 accumulates flow data when the inflation channel is open. When the inflation capacity of the high-pressure gas cylinder 160 reaches the preset inflation capacity, it controls the second shut-off valve 154 to close, thereby stopping the inflation of the high-pressure gas cylinder 160.

[0105] Based on the above embodiments, optionally, Figure 7 This is a schematic diagram of another quantitative filling device provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the throttling control module 150 includes a fifth flow regulator 157, a sixth flow regulator 158, and a three-way valve 159;

[0106] The first port of the three-way valve 159 serves as the inlet of the throttling regulating module 150. The second port of the three-way valve 159 is connected to the first port of the fifth flow regulator 157. The third port of the three-way valve 159 is connected to the first port of the sixth flow regulator 158. The second port of the fifth flow regulator 157 serves as the first outlet of the throttling regulating module 150, and the second port of the sixth flow regulator 158 serves as the second outlet of the throttling regulating module 150.

[0107] Specifically, based on the above connection relationship, the working process of the quantitative filling device is described as follows: the control module 140 controls the first and second ports of the three-way valve 159 to be open, controls the first and third ports of the three-way valve 159 to be closed, the opening degree of the fifth flow regulator 157 to the full opening threshold, and the opening degree of the fourth flow regulator 156 to the second opening threshold; the control module 140 starts the booster pump 1221 to control the liquefied gas to circulate in the circulation pipeline, and starts the cooler 1211 to adjust the temperature of the liquefied gas. When the temperature of the liquefied gas drops to the first temperature threshold, the control module 140 controls the opening of the fifth flow regulator 157 to the second opening threshold. When the pressure fed back by the pressure sensor 1224 is greater than the first pressure threshold, the control module 140 controls the booster pump 1221 to stop. When the pressure fed back by the pressure sensor 1224 is equal to the second pressure threshold, the control module 140 controls the booster pump 1221 to start. When the pressure fed back by the pressure sensor 1224 changes within the first pressure range threshold, the control module 140 controls the first and second ports of the three-way valve 159 to close, and controls the first and third ports of the three-way valve 159 to open. At the same time, the control module 140 accumulates flow data when the filling channel is open. When the filling capacity of the high-pressure gas cylinder 160 reaches the preset filling capacity, the control module 140 controls the first and third ports of the three-way valve 159 to close, thereby stopping the filling of the high-pressure gas cylinder 160.

[0108] Figure 8 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention, as shown below. Figure 8 As shown, this quantitative filling method is performed using the quantitative filling device provided in any embodiment of the present invention.

[0109] In one embodiment, the quantitative filling method includes:

[0110] S110, the flow monitoring module detects and records the flow data of the circulation pipe and the inflation channel.

[0111] S120, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to make the liquefied gas stored in the gas storage module circulate in the circulation pipeline and adjust the temperature of the liquefied gas.

[0112] S130. When the temperature of the liquefied gas drops to the first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas in the filling channel. At the same time, the control module controls the filling amount of the high-pressure gas cylinder through the throttling adjustment module based on the flow data.

[0113] Figure 9 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention, as shown below. Figure 9 As shown, in another embodiment, the quantitative filling method includes:

[0114] S210, the flow monitoring module detects and records the flow data of the circulation pipe and the inflation channel.

[0115] S210, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to make the liquefied gas stored in the gas storage module circulate in the circulation pipeline and adjust the temperature of the liquefied gas.

[0116] S230: When the temperature of the liquefied gas drops to the first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within the first pressure range threshold, the control module controls the throttling adjustment module to open the filling channel. When the filling channel is open, the control module controls the filling amount of the high-pressure gas cylinder according to the flow data.

[0117] In this embodiment of the invention, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to circulate the liquefied gas stored in the gas storage module within the circulation pipeline and regulates the temperature of the liquefied gas. When the temperature of the liquefied gas drops to a first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas in the filling channel. Simultaneously, based on flow data, the control module controls the filling amount of the high-pressure gas cylinder through the throttling adjustment module. Alternatively, when the temperature of the liquefied gas drops to the first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module opens the filling channel, and when the filling channel is open, the control module controls the filling amount of the high-pressure gas cylinder based on flow data through the throttling adjustment module. Therefore, the quantitative filling method provided by this embodiment of the invention can improve the accuracy of the filling amount.

[0118] Based on the above embodiments, optionally, the temperature and pressure regulation module includes a temperature regulation unit and a pressure regulation unit; the pressure regulation unit includes a booster pump, a pressure stabilizing tank, a temperature sensor and a pressure sensor, the temperature regulation unit includes a cooler, and the throttling regulation module includes a first flow regulator and a second flow regulator;

[0119] The outlet of the gas storage module, cooler, booster pump, pressure stabilizing tank, flow monitoring module, first flow regulator, and inlet of the gas storage module are connected in sequence to form a circulation pipeline; the outlet of the gas storage module, cooler, booster pump, pressure stabilizing tank, flow monitoring module, second flow regulator, and high-pressure gas cylinder are connected in sequence to form a gas filling channel.

[0120] Figure 10 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention, as shown below. Figure 10 As shown, the specific steps of the quantitative filling method include:

[0121] S310, the flow monitoring module detects and records the flow data of the circulation pipe and the inflation channel.

[0122] S320, the control module controls the opening degree of the first flow regulator to the first opening degree threshold or the full opening degree threshold.

[0123] The control module controls the opening degree of the first flow regulator to the first opening degree threshold or the full opening degree threshold to conduct the circulation pipeline.

[0124] S330: The control module starts the booster pump to control the liquefied gas to circulate in the circulation pipeline, and starts the cooler to regulate the temperature of the liquefied gas.

[0125] Starting the booster pump allows the liquefied gas in the storage tank to circulate within the circulation pipeline, venting the gaseous gas in the circulation pipeline back to the storage tank. Starting the cooler lowers the temperature of the liquefied gas circulating in the circulation pipeline, ensuring that the liquefied gas circulating in the pipeline remains stably in a liquid state.

[0126] S340: When the temperature of the liquefied gas drops to the first temperature threshold, the control module controls the first flow regulator to close, controls the opening degree of the second flow regulator to the second opening degree threshold, controls the booster pump to stop when the pressure fed back by the pressure sensor is greater than the first pressure threshold, and controls the booster pump to start when the pressure fed back by the pressure sensor is equal to the second pressure threshold. At the same time, the control module controls the filling amount of the high-pressure gas cylinder through the throttling adjustment module according to the flow data; wherein, the first opening degree threshold is greater than the second opening degree threshold.

[0127] Specifically, the second flow regulator is opened to a second opening threshold, causing the flow rate in the filling channel to be less than the flow rate of the booster pump. Liquefied gas flows into the high-pressure cylinder through the second flow regulator, and flow data begins to accumulate. Due to the throttling effect of the second flow regulator, the flow rate of the booster pump exceeds the flow rate limited by the second flow regulator. At this point, the pressure in the pressure stabilizing tank begins to rise. When the pressure in the pressure stabilizing tank reaches the first pressure threshold, the booster pump is stopped. As the liquefied gas in the pressure stabilizing tank flows into the high-pressure cylinder through the second flow regulator, the pressure in the pressure stabilizing tank begins to fall again. When the pressure in the pressure stabilizing tank drops to the second pressure threshold (the low-pressure setpoint must be higher than the filling pressure of the high-pressure cylinder), the booster pump is restarted, and the pressure in the pressure stabilizing tank begins to rise. This cycle repeats to ensure that the pressure in the pressure stabilizing tank remains stable within the first pressure range threshold.

[0128] S350: When the pressure cylinder reaches the preset filling amount, the control module controls the second flow regulator to shut off the filling channel to stop filling the pressure cylinder.

[0129] In summary, by controlling the pressure of the pressure stabilizing tank to remain within the first pressure range threshold, the liquefied gas in the inflation channel will not change its state due to a sudden drop in pressure, which would lead to inaccurate flow meter measurements and thus improve the accuracy of the inflation volume.

[0130] Figure 11 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention, as shown below. Figure 11 As shown, the specific steps of the quantitative filling method include:

[0131] S410, the flow monitoring module detects and records the flow data of the circulation pipe and the inflation channel.

[0132] S420, the control module controls the opening degree of the first flow regulator to the first opening degree threshold or the full opening degree threshold.

[0133] S430: The control module starts the booster pump to control the liquefied gas to circulate in the circulation pipeline, and starts the cooler to regulate the temperature of the liquefied gas.

[0134] S440: When the temperature of the liquefied gas drops to the first temperature threshold, the control module controls the opening degree of the first flow regulator to the second opening threshold. When the pressure fed back by the pressure sensor is greater than the first pressure threshold, the control module controls the booster pump to stop. When the pressure fed back by the pressure sensor is equal to the second pressure threshold, the control module controls the booster pump to start.

[0135] Specifically, once the temperature of the liquefied gas stabilizes at a first temperature threshold, the opening of the first flow regulator is reduced to a second opening threshold, thereby controlling the flow rate of the liquefied gas in the circulation pipeline. Controlling the opening of the first flow regulator to the second opening threshold ensures that the instantaneous flow rate during circulation is close to the instantaneous flow rate through the second flow regulator during filling. Due to the flow restriction of the first flow regulator, when the pressure in the pressure stabilizing tank reaches the first pressure threshold, the booster pump stops. As the liquefied gas in the pressure stabilizing tank flows into the high-pressure cylinder through the second flow regulator, the pressure in the pressure stabilizing tank begins to decrease again. When the pressure in the pressure stabilizing tank decreases to the second pressure threshold (the low-pressure setpoint must be higher than the filling pressure of the high-pressure cylinder), the booster pump restarts, and the pressure in the pressure stabilizing tank begins to rise. This cycle repeats to ensure that the pressure in the pressure stabilizing tank remains stable within the first pressure range threshold.

[0136] S450: When the pressure fed back by the pressure sensor changes within the first pressure range threshold, the control module controls the first flow regulator to close and controls the opening degree of the second flow regulator to the second opening threshold.

[0137] In particular, because the pressure and flow rate are controlled during the entire cycle flow restriction period and inflation process before the opening of the second flow regulator is controlled to the second opening threshold, the fluctuation of the inflation channel is smaller and the inflation volume is more accurate when the first flow regulator is closed and the opening of the second flow regulator is controlled to the second opening threshold.

[0138] S460: When the pressure cylinder reaches the preset filling amount, the control module controls the second flow regulator to shut off the filling channel to stop filling the pressure cylinder.

[0139] Based on the above embodiments, optionally, the temperature and pressure regulation module includes a temperature regulation unit and a pressure regulation unit; the pressure regulation unit includes a booster pump, a pressure stabilizing tank, a temperature sensor and a pressure sensor, the temperature regulation unit includes a cooler, and the throttling regulation module includes a first shut-off valve, a second shut-off valve, a third flow regulator and a fourth flow regulator;

[0140] The outlet of the gas storage module, cooler, booster pump, pressure stabilizing tank, flow monitoring module, first shut-off valve, third flow regulator, and inlet of the gas storage module are connected in sequence to form a circulation pipeline; the outlet of the gas storage module, cooler, booster pump, pressure stabilizing tank, flow monitoring module, second shut-off valve, fourth flow regulator, and high-pressure gas cylinder are connected in sequence to form a gas filling channel.

[0141] Figure 12 This is a schematic flowchart of a quantitative filling method provided in an embodiment of the present invention, as shown below. Figure 12 As shown, the specific steps of the quantitative filling method include:

[0142] S510, the control module controls the first shut-off valve to open, the second shut-off valve to close, the third flow regulator to open to the full opening threshold, and the fourth flow regulator to open to the second opening threshold.

[0143] S520: The control module starts the booster pump to control the liquefied gas to circulate in the circulation pipeline, and starts the cooler to regulate the temperature of the liquefied gas.

[0144] S530: When the temperature of the liquefied gas drops to the first temperature threshold, the control module controls the opening degree of the third flow regulator to the second opening threshold. When the pressure fed back by the pressure sensor is greater than the first pressure threshold, the control module controls the booster pump to stop. When the pressure fed back by the pressure sensor is equal to the second pressure threshold, the control module controls the booster pump to start.

[0145] S540: When the pressure fed back by the pressure sensor changes within the first pressure range threshold, the control module controls the first shut-off valve to close and the second shut-off valve to open.

[0146] S550: When the pressure cylinder reaches the preset inflation level, the control module controls the second shut-off valve to close the inflation channel, thereby stopping the inflation of the pressure cylinder.

[0147] In summary, since the first and second shut-off valves provide instantaneous shut-off, and the third and fourth flow regulators are only responsible for flow restriction, using the first and second shut-off valves to switch the liquefied gas flow channels is faster and the flow rate fluctuations are smaller.

[0148] Based on the above embodiments, the first shut-off valve and the second shut-off valve may optionally be replaced by a throttling device, such as a throttling plate.

[0149] In another embodiment, the first and second shut-off valves can also be replaced by a three-way valve to switch the circulation pipe and the inflation channel.

[0150] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0151] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A quantitative filling device, characterized in that, It includes a gas storage module, a temperature and pressure regulation module, a flow monitoring module, a control module, a throttling regulation module, and a high-pressure gas cylinder; The temperature and pressure regulation module, the flow monitoring module, and the throttling regulation module are all connected to the control module; The outlet of the gas storage module, the temperature and pressure regulation module, the flow monitoring module, the inlet of the throttling regulation module, the first outlet of the throttling regulation module, and the inlet of the gas storage module are connected in sequence to form a circulation pipeline; the outlet of the gas storage module, the temperature and pressure regulation module, the flow monitoring module, the inlet of the throttling regulation module, the second outlet of the throttling regulation module, and the high-pressure gas cylinder are connected in sequence to form a gas filling channel; The flow monitoring module is used to detect and record the flow data of the circulation pipe and the inflation channel; The control module is used to control the throttling adjustment module and the temperature and pressure adjustment module to circulate the liquefied gas stored in the gas storage module in the circulation pipeline and to adjust the temperature of the liquefied gas. The control module is used to control the throttling module and the temperature-pressure regulation module to adjust the pressure of the liquefied gas in the filling channel when the temperature of the liquefied gas drops to a first temperature threshold. Simultaneously, it controls the filling volume of the high-pressure gas cylinder through the throttling module based on the flow rate data; or... The control module is used to control the throttling module and the temperature and pressure regulating module to adjust the pressure of the liquefied gas circulating in the circulation pipeline when the temperature of the liquefied gas drops to a first temperature threshold; to control the throttling module to open the gas filling channel when the pressure of the liquefied gas changes within a first pressure range threshold; and to control the gas filling amount of the high-pressure gas cylinder through the throttling module according to the flow data when the gas filling channel is open.

2. The quantitative filling device according to claim 1, characterized in that, The temperature and pressure regulation module includes a temperature regulation unit and a pressure regulation unit; The outlet of the gas storage module is connected to the inlet of the temperature regulating unit, the outlet of the temperature regulating unit is connected to the inlet of the pressure regulating unit, and the outlet of the pressure regulating unit is connected to the flow monitoring module. Both the temperature regulating unit and the pressure regulating unit are connected to the control module; The control module is used to control the temperature regulating unit to adjust the temperature of the liquefied gas in the circulation pipe and the inflation channel, and to control the pressure regulating unit to adjust the pressure in the circulation pipe and the inflation channel.

3. The quantitative filling device according to claim 2, characterized in that, The pressure regulating unit includes a booster pump, a pressure stabilizing tank, a temperature sensor, and a pressure sensor; The inlet of the booster pump serves as the inlet of the pressure regulating unit, the outlet of the booster pump is connected to the inlet of the pressure stabilizing tank, and the outlet of the pressure stabilizing tank serves as the outlet of the pressure regulating unit. Both the temperature sensor and the pressure sensor are mounted on the pressure stabilizing tank, and the booster pump, the temperature sensor, and the pressure sensor are all connected to the control module. The control module is used to control the booster pump to adjust the pressure of the liquefied gas circulating in the gas filling channel or the circulation pipe, control the temperature sensor to detect the temperature of the liquefied gas, and control the pressure sensor to detect the pressure of the liquefied gas.

4. The quantitative filling device according to claim 2, characterized in that, The temperature control unit includes a cooler; the flow monitoring module includes a flow meter. The inlet of the cooler serves as the inlet of the temperature regulating unit, and the outlet of the cooler serves as the outlet of the temperature regulating unit. The cooler is used to cool the liquefied gas so that the liquefied gas remains in a liquid state; the first port of the flow meter serves as the inlet of the flow monitoring module, and the second port of the flow meter serves as the outlet of the flow monitoring module.

5. The quantitative filling device according to claim 1, characterized in that, The throttling control module includes a first flow regulator and a second flow regulator; The first port of the first flow regulator and the first port of the second flow regulator are connected and serve as the inlet of the throttling control module. The second port of the first flow regulator serves as the first outlet of the throttling control module, and the second port of the second flow regulator serves as the second outlet.

6. The quantitative filling device according to claim 1, characterized in that, The throttling control module includes a first shut-off valve, a second shut-off valve, a third flow regulator, and a fourth flow regulator; The first port of the first shut-off valve is connected to the first port of the second shut-off valve and serves as the inlet of the throttling regulating module. The second port of the first shut-off valve is connected to the first port of the third flow regulator. The second port of the second shut-off valve is connected to the first port of the fourth flow regulator. The second port of the third flow regulator serves as the first outlet of the throttling regulating module, and the second port of the fourth flow regulator serves as the second outlet of the throttling regulating module.

7. The quantitative filling device according to claim 1, characterized in that, The throttling control module includes a fifth flow regulator, a sixth flow regulator, and a three-way valve; The first port of the three-way valve serves as the inlet of the throttling regulating module. The second port of the three-way valve is connected to the first port of the fifth flow regulator. The third port of the three-way valve is connected to the first port of the sixth flow regulator. The second port of the fifth flow regulator serves as the first outlet of the throttling regulating module. The second port of the sixth flow regulator serves as the second outlet of the throttling regulating module.

8. A quantitative filling method, performed using the quantitative filling device according to any one of claims 1-7, characterized in that, include: The flow monitoring module detects and records the flow data of the circulation pipe and the inflation channel; The control module controls the throttling adjustment module and the temperature and pressure adjustment module to circulate the liquefied gas stored in the gas storage module in the circulation pipeline and adjusts the temperature of the liquefied gas. When the temperature of the liquefied gas drops to a first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas in the filling channel. Simultaneously, based on the flow rate data, the throttling adjustment module controls the filling volume of the high-pressure gas cylinder; or... When the temperature of the liquefied gas drops to a first temperature threshold, the control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module controls the throttling adjustment module to open the filling channel. When the filling channel is open, the control module controls the filling amount of the high-pressure gas cylinder according to the flow data.

9. The quantitative filling method according to claim 8, characterized in that, The temperature and pressure regulation module includes a temperature regulation unit and a pressure regulation unit; The pressure regulating unit includes a booster pump, a pressure stabilizing tank, a temperature sensor, and a pressure sensor; the temperature regulating unit includes a cooler; and the throttling regulating module includes a first flow regulator and a second flow regulator. The outlet of the gas storage module, the cooler, the booster pump, the pressure stabilizing tank, the flow monitoring module, the first flow regulator, and the inlet of the gas storage module are connected in sequence to form a circulation pipeline; the outlet of the gas storage module, the cooler, the booster pump, the pressure stabilizing tank, the flow monitoring module, the second flow regulator, and the high-pressure gas cylinder are connected in sequence to form a gas filling channel. The control module controls the throttling module and the temperature and pressure regulating module to circulate the liquefied gas stored in the gas storage module within the circulation pipeline, and regulates the temperature of the liquefied gas, including: Control the opening degree of the first flow regulator to a first opening degree threshold or a full opening threshold; The booster pump is started to control the liquefied gas to circulate in the circulation pipeline, and the cooler is started to regulate the temperature of the liquefied gas; The control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas in the inflation channel, including: The first flow regulator is controlled to close, the second flow regulator is controlled to open to a second opening threshold, the booster pump is controlled to stop when the pressure fed back by the pressure sensor is greater than a first pressure threshold, and the booster pump is controlled to start when the pressure fed back by the pressure sensor is equal to the second pressure threshold; wherein, the first opening threshold is greater than the second opening threshold. The control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module controls the throttling adjustment module to open the gas filling channel, including: The opening degree of the first flow regulator is controlled to the second opening threshold. When the pressure fed back by the pressure sensor is greater than the first pressure threshold, the booster pump is controlled to stop. When the pressure fed back by the pressure sensor is equal to the second pressure threshold, the booster pump is controlled to start. When the pressure fed back by the pressure sensor changes within a first pressure range threshold, the first flow regulator is controlled to close, and the opening degree of the second flow regulator is controlled to the second opening threshold.

10. The quantitative filling method according to claim 8, characterized in that, The temperature and pressure regulation module includes a temperature regulation unit and a pressure regulation unit; The pressure regulating unit includes a booster pump, a pressure stabilizing tank, a temperature sensor, and a pressure sensor; the temperature regulating unit includes a cooler; and the throttling regulating module includes a first shut-off valve, a second shut-off valve, a third flow regulator, and a fourth flow regulator. The outlet of the gas storage module, the cooler, the booster pump, the pressure stabilizing tank, the flow monitoring module, the first shut-off valve, the third flow regulator, and the inlet of the gas storage module are connected in sequence to form a circulation pipeline; the outlet of the gas storage module, the cooler, the booster pump, the pressure stabilizing tank, the flow monitoring module, the second shut-off valve, the fourth flow regulator, and the high-pressure gas cylinder are connected in sequence to form a gas filling channel; The control module controls the throttling module and the temperature and pressure regulating module to circulate the liquefied gas stored in the gas storage module within the circulation pipeline, and regulates the temperature of the liquefied gas, including: The first shut-off valve is opened, the second shut-off valve is closed, the opening degree of the third flow regulator is set to the full opening threshold, and the opening degree of the fourth flow regulator is set to the second opening threshold. The booster pump is started to control the liquefied gas to circulate in the circulation pipeline, and the cooler is started to regulate the temperature of the liquefied gas; The control module controls the throttling adjustment module and the temperature and pressure adjustment module to adjust the pressure of the liquefied gas circulating in the circulation pipeline. When the pressure of the liquefied gas changes within a first pressure range threshold, the control module controls the throttling adjustment module to open the gas filling channel, including: Control the opening degree of the third flow regulator to the second opening degree threshold, control the booster pump to stop when the pressure fed back by the pressure sensor is greater than the first pressure threshold, and control the booster pump to start when the pressure fed back by the pressure sensor is equal to the second pressure threshold; When the pressure fed back by the pressure sensor changes within a first pressure range threshold, the first shut-off valve is controlled to close, and the second shut-off valve is controlled to open.

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