CN-121993737-A - Pneumatic supply system

CN121993737ACN 121993737 ACN121993737 ACN 121993737ACN-121993737-A

Abstract

The invention discloses a pneumatic supply system, which relates to the field of pneumatic supply, and the pneumatic supply system comprises a two-stage compression framework comprising a low-pressure compression unit and a high-pressure compression unit, wherein a gas storage unit is used as an intermediate gas source for buffering, a plurality of controlled valves in a valve group unit are matched for flexibly scheduling gas flow paths, a plurality of gas source systems which are originally scattered and independent are successfully integrated into a single integrated system, and a control unit can analyze a target pressure value in a gas consumption request in real time and execute intelligent hierarchical regulation. The design not only covers a wide range of operating pressures from low to high pressure, but also significantly avoids the inefficient consumption of the high pressure compression unit under low pressure conditions.

Inventors

YU ZHENHUAN
HUANG CHUNSHENG
SHEN LEI

Assignees

浙江黎明智造股份有限公司
上海黎旻佶安汽车悬架有限公司

Dates

Publication Date: 20260508
Application Date: 20260403

Claims (10)

1. A pneumatic supply system, comprising: A low pressure compression unit configured to provide compressed gas at a first pressure range; A high pressure compression unit configured to secondarily compress the input gas to provide a compressed gas of a second pressure range higher than the first pressure range; A gas storage unit configured to receive and store compressed gas from the low pressure compression unit; The valve group unit is arranged in the gas path and comprises a plurality of controlled valves; the control unit is in signal connection with the valve group unit and is configured to analyze a current gas consumption request, and the gas consumption request at least comprises a target pressure value; The control unit generates a control instruction according to the analysis result and drives the corresponding controlled valve to act so as to: When the target pressure value is in a first pressure range, gas is led to originate from the low-pressure compression unit and output; when the target pressure value is in the second pressure range, gas is led to originate from at least one of the low-pressure compression unit or the gas storage unit, and is output after being compressed by the high-pressure compression unit for the second time.
2. A pneumatic supply system as set forth in claim 1, further comprising: The at least three output paths are respectively a first output path, a second output path and a third output path; a drying unit configured to dehumidify the compressed gas flowing therethrough; the gas request also includes a target dryness level; The control unit is further configured to generate corresponding control instructions according to the target dryness level and drive corresponding controlled valve actions to: the control unit selectively, when the target pressure value is in a first pressure range, based on the target dryness fraction: controlling the output gas from the low pressure compression unit to be directly output through the first output path; controlling output gas from the low-pressure compression unit to sequentially flow through the drying unit and the gas storage unit and then output through a second output path; controlling the gas in the gas storage unit to be output through the second output path; And when the target pressure value is in the second pressure range, controlling the gas subjected to secondary compression by the high-pressure compression unit to continue to flow through the drying unit for dehumidification and then output through a third output path.
3. A pneumatic supply system as claimed in claim 2, wherein, The control unit is further configured to perform a desiccant regeneration procedure: When the accumulated running time of the drying unit is detected to reach the corresponding preset running time, and the current pressure value of the gas storage unit is larger than a first preset threshold value, a control instruction is generated, the corresponding controlled valve is driven to act, and the gas of the gas storage unit is blown back to the drying unit and then is output.
4. A pneumatic supply system as claimed in claim 3, wherein, The low-pressure compression unit comprises a low-pressure compressor and a first one-way valve; The air inlet end of the first one-way valve is communicated with the air outlet end of the low-pressure compressor, and the air outlet end of the first one-way valve forms the output end of the low-pressure compression unit.
5. A pneumatic supply system as claimed in claim 4, wherein, The high-pressure compression unit comprises a high-pressure compressor and a second one-way valve; The air inlet end of the second one-way valve is communicated with the air outlet end of the high-pressure compressor, and the air outlet end of the second one-way valve forms the output end of the high-pressure compression unit.
6. A pneumatic supply system as set forth in claim 5, wherein, The target dryness level includes a first dryness level and a second dryness level; The drying unit comprises a first dryer and a second dryer; The air inlet end of the first dryer is communicated with the output end of the low-pressure compression unit, and the air outlet end of the first dryer is communicated with the air inlet end of the high-pressure compressor; The air inlet end of the second dryer is communicated with the output end of the high-pressure compression unit; The first dryer is configured to perform a first stage dehumidification of the gas to a first dryness level, and the second dryer is configured to perform a second stage dehumidification of the gas to a second dryness level that is higher than the first dryness level.
7. A pneumatic supply system as in claim 6 wherein said valve block unit comprises: A first discharge valve connected to an air inlet end of the first dryer; a second discharge valve connected to an air inlet end of the second dryer; One end of the first air path switching valve is connected to a connecting pipeline between the air outlet end of the first dryer and the air inlet end of the high-pressure compressor, and the other end of the first air path switching valve is connected to the air storage unit; One end of the second gas path switching valve is connected to the connecting pipeline of the first gas path switching valve and the gas storage unit, and the other end of the second gas path switching valve is connected to the gas outlet end of the second dryer; A first on-off valve is arranged on the first output path; A second on-off valve is arranged on the second output path; and a third three-way shut-off valve is arranged on the third output path.
8. A pneumatic supply system according to claim 7, wherein the control unit is specifically configured to: When the target pressure value is in a first pressure range and the target dryness fraction is a first dryness fraction, the control unit is configured to execute the following logic: If the current pressure value of the gas in the gas storage unit is smaller than or equal to a fourth preset threshold value, generating control instructions for opening the first gas path switching valve and the second gas path switching valve, closing the second gas path switching valve, and the first on-off valve and the third gas path switching valve, and executing the control instructions, so that the output gas from the low-pressure compression unit sequentially flows through the first dryer and the gas storage unit and is output; If the current pressure value of the gas in the gas storage unit is larger than a fourth preset threshold value, generating control instructions for opening the second on-off valve and closing the first gas path switching valve and the second gas path switching valve, and executing the control instructions to enable the compressed gas prestored in the gas storage unit to be directly output through the second output path; And when the target pressure value is in the first pressure range and the target drying grade indicates that drying is not needed, generating control instructions for opening the first on-off valve, closing the first gas path switching valve, the second gas path switching valve and the third gas path switching valve, and executing the control instructions to directly output the output gas from the low-pressure compression unit.
9.A pneumatic supply system according to claim 7, wherein the control unit is specifically configured to: When the target pressure value is in a second pressure range and the current pressure value of the gas storage unit is larger than a second preset threshold value, generating control instructions for opening the first gas path switching valve, the third gas path switching valve, closing the second gas path switching valve, the first on-off valve and the second on-off valve, executing the control instructions, and sequentially processing and outputting output gas from the gas storage unit through the high-pressure compression unit and the second dryer; When the target pressure value is in a second pressure range and the current pressure value of the gas storage unit is smaller than or equal to a second preset threshold value, control instructions for opening the third switching valve, closing the first gas path switching valve, closing the second gas path switching valve and the first switching valve are generated and executed, so that output gas from the low-pressure compression unit is sequentially processed by the high-pressure compression unit and the second dryer and then output.
10. A pneumatic supply system as set forth in claim 7 wherein, The control unit is further configured to perform a desiccant regeneration procedure, comprising in particular: when the accumulated running time of the first dryer is detected to reach a first preset duration and the current pressure value of the gas storage unit is larger than a first preset threshold, generating control instructions for closing a second switching valve, a second gas path switching valve and a first discharge valve, so that gas in the gas storage unit reversely sweeps the first dryer and is discharged through the first discharge valve; when the accumulated running time of the second dryer is detected to reach a second preset duration and the current pressure value of the gas storage unit is larger than a first preset threshold, a control instruction for closing the second switching valve, the third switching valve, the first gas path switching valve and opening the second gas path switching valve and the second discharge valve is generated, so that the gas in the gas storage unit is reversely blown to the second dryer and discharged through the second discharge valve.

Description

Pneumatic supply system Technical Field The invention relates to the field of pneumatic supply, in particular to a pneumatic supply system. Background Along with the rapid development of the electric and intelligent automobiles, the application scenes of the vehicle-mounted compressed air are increasingly abundant, and the vehicle-mounted compressed air has the functions of seat massage and pneumatic adjustment, oxygen generation system, sensor and camera cleaning, automatic tire inflation, active flank driving, air suspension, inflation of outdoor equipment (such as an air cushion bed and a rubber boat) and the like. The above application scenario has significant differences in the pressure and flow requirements of compressed air, with operating pressures typically spanning 100kPa to 18bar. However, in the prior art, the vehicle is generally configured with independent air source systems (such as an independent air suspension compressor, a seat air pump or a portable inflator pump) respectively aiming at different functional modules, and the distributed air supply scheme has a plurality of defects that firstly, a plurality of independent air pumps, dryers and control components lead to high system cost and high enterprise, a large amount of whole vehicle arrangement space is occupied and the vehicle weight is increased, secondly, the use frequency of each independent air source system is greatly different, the utilization rate of the whole device is low, and secondly, the conventional single-level air source design is difficult to flexibly consider the diversified requirements of wide-range pressure grades (such as low pressure, medium pressure and high pressure) and lacks cooperative scheduling capacity based on pressure grading, and finally, the drying device in the traditional air path mostly adopts a disposable adsorption structure and lacks effective online regeneration capacity and is always connected in series in a working loop. Whether the air terminal is used for forced drying treatment or not has the requirement on the dryness, not only is unnecessary energy loss caused, but also the saturation failure of the drying agent is accelerated because the drying agent cannot be regenerated, so that a user needs to frequently replace a drying component, and the maintenance cost of the whole life cycle is greatly increased. Therefore, how to develop a vehicle-mounted pneumatic supply system capable of integrally meeting the requirements of different pressure levels and dryness, having the capability of drying regeneration or intelligent bypass, improving the utilization rate of equipment and optimizing the energy consumption is a technical problem to be solved by those skilled in the art. Disclosure of Invention In order to overcome the defects of frequent maintenance caused by high cost, poor pressure adaptability and lack of regeneration capability of a drying device of the traditional distributed air source system, the invention provides a pneumatic supply system, which comprises: A low pressure compression unit configured to provide compressed gas at a first pressure range; A high pressure compression unit configured to secondarily compress the input gas to provide a compressed gas of a second pressure range higher than the first pressure range; A gas storage unit configured to receive and store compressed gas from the low pressure compression unit; The valve group unit is arranged in the gas path and comprises a plurality of controlled valves; the control unit is in signal connection with the valve group unit and is configured to analyze a current gas consumption request, and the gas consumption request at least comprises a target pressure value; The control unit generates a control instruction according to the analysis result and drives the corresponding controlled valve to act so as to: When the target pressure value is in a first pressure range, gas is led to originate from the low-pressure compression unit and output; when the target pressure value is in the second pressure range, gas is led to originate from at least one of the low-pressure compression unit or the gas storage unit, and is output after being compressed by the high-pressure compression unit for the second time. Further, the method further comprises the following steps: The at least three output paths are respectively a first output path, a second output path and a third output path; a drying unit configured to dehumidify the compressed gas flowing therethrough; the gas request also includes a target dryness level; The control unit is further configured to generate corresponding control instructions according to the target dryness level and drive corresponding controlled valve actions to: the control unit selectively, when the target pressure value is in a first pressure range, based on the target dryness fraction: controlling the output gas from the low pressure compression unit to be directly output through the first output path;