A multi-channel gas flow control device

Abstract

This application discloses a multi-channel gas flow control device, employing a multi-unit integrated multi-gas ventilation system control device. Multiple gas inlet ports are connected to the inlet ports on the front face of the mixing gas channel module. Gas, distributed through the distribution channel, flows to each mass flow control unit within the module. After being proportionally adjusted and distributed as needed, the gas enters the internal cavity at the rear end of the mixing gas channel module, and then flows through the longitudinal flow channel outlet of the cavity to the electromagnetic self-control module at the rear end. This device has fewer wiring and piping points, high integration, and short system response time, providing users with superior performance. This invention uses a multi-unit integrated modular system for precise distribution and control of the ventilation volume of multiple gases, effectively solving a series of problems associated with existing single gas flow meter stacking combinations, such as large volume, significant accuracy errors, complex and difficult-to-control wiring points, and susceptibility to leakage.

Description

Technical Field

[0001] This application relates to the field of control device technology, and more specifically, to a multi-channel gas flow control device. Background Technology

[0002] Gas flow control devices precisely supply gas to target reaction devices by regulating and distributing the flow of multiple gases through multi-connection control. They are mainly used in most gas-requiring biological culture and fermentation equipment on the market today.

[0003] As the requirements for innovation and performance in various bioreactors become increasingly stringent, especially for gas-supply reactors, greater emphasis is placed on the structure and functional layout of gas control devices. Furthermore, the efficient development of processes relies heavily on the optimal configuration of key systems. Existing multi-channel gas flow control devices are often constrained by factors such as spatial structure, system response, and wiring layout, making them prone to inaccurate flow control and leakage risks. In addition, existing multi-channel gas flow control devices employ a method of stacking multiple sets of single gas flow meters for gas flow, resulting in a series of problems including inaccurate control accuracy, complex pipelines, and susceptibility to leakage.

[0004] Therefore, precise proportional control using a multi-unit integrated system provides the best solution for related experiments and applications. Summary of the Invention

[0005] The main objective of this application is to provide a multi-channel gas flow control device to solve the current problems.

[0006] To achieve the above objectives, this application provides the following technology:

[0007] A multi-channel gas flow control device, comprising:

[0008] The front-end air intake control system is used to provide multiple air intakes and control the quality of the intake air;

[0009] An internal gas distribution system is used to distribute gas through a multi-channel chamber and to set the gas on / off time.

[0010] The back-end gas outlet system is used to output gas to the terminal under electromagnetic control according to a preset gas control mode;

[0011] The front-end air intake control system and the rear-end air outlet system are connected in series between the internal air volume distribution system.

[0012] As an optional implementation of this application, the front-end air intake control system may optionally include:

[0013] A multi-way gas inlet port is located on the front surface of the mixing gas channel module for multi-way gas intake;

[0014] A gas mass flow control module is symmetrically arranged on the upper and lower end faces of the mixed gas channel module, and is used to quantitatively control the gas mass flow rate of the incoming gas.

[0015] As an optional embodiment of this application, the gas mass flow control module may optionally include:

[0016] Several mass flow control units connected to the air inlets of the mixed gas channel module;

[0017] Diagonal fixing holes are provided at opposite corners of the mass flow control unit;

[0018] Diagonal fixing posts, fitted into the diagonal fixing holes, are used to fix the mass flow control unit on the end face of the mixed gas channel module;

[0019] The air inlet is located inside the mass flow control unit and is connected to the longitudinal distribution air passage of the mixing air channel module;

[0020] The air outlet is located inside the mass flow control unit and is connected to the lateral output channel of the mixed gas channel module;

[0021] The signal port, located on the mass flow control unit, is used to receive communication signals sent by the communication control module.

[0022] As an optional implementation of this application, the internal gas distribution system may optionally include:

[0023] Mixed gas passage module;

[0024] The communication control module is located in the gas mixing channel module and is used to implement flow ratio and on / off control of the mass flow control unit and the electromagnetic automatic control module respectively according to the preset input and output control signals.

[0025] The front-end air intake channel is located within the mixed air channel module, with its input end connected to the air intake port and its output end connected to the longitudinal distribution air channel.

[0026] A lateral distribution air passage is located within the mixed gas passage module and is connected to the outside.

[0027] A longitudinally distributed air passage is located within the mixed air passage module, and its output end is connected to the air inlet.

[0028] As an optional embodiment of this application, the transverse distribution airway is provided with sealing plugs at both ends. When the connecting airway is internally blocked, the sealing plugs are removed to clear the blockage.

[0029] As an optional implementation of this application, the communication control module may include: internal electrical control circuitry and multi-pin output terminals, used to implement flow ratio and on / off control of the mass flow control unit and the electromagnetic automatic control module respectively according to preset input and output control signals.

[0030] As an optional implementation of this application, the back-end air outlet system may optionally include:

[0031] The rear air passage module is located on the mixed gas passage module;

[0032] Electromagnetic automatic control modules are symmetrically arranged in groups on the upper and lower end faces of the rear gas duct module and communicate with the communication control module; the electromagnetic automatic control module controls whether the mixed gas from the rear longitudinal gas duct flows out to the terminal reactor, and controls the gas on / off time according to the communication settings of the communication control module.

[0033] The required gas outlet port is located on the rear gas channel module and is used to discharge the required gas according to preset conditions.

[0034] As an optional implementation of this application, the back-end airway module may optionally be provided with:

[0035] The rear air outlet port is sealed and fitted onto the rear surface of the rear air duct module;

[0036] The longitudinal receiving port is located within the rear air passage module and is connected to the rear air outlet port.

[0037] A transverse channel is located within the rear airway module and communicates with the longitudinal receiving port; both ends of the transverse channel are also equipped with sealing plugs.

[0038] A fixed connection hole is provided on the rear end face of the rear air passage module, which is used to fix the rear air passage module on the rear end face of the mixed gas passage module with the cooperation of the fastener.

[0039] As an optional implementation of this application, the back-end airway module may also be provided with:

[0040] A lateral output channel is located within the rear airway module, with one end connected to the longitudinal receiving port and the other end connected to the air outlet.

[0041] The rear longitudinal airway is located within the rear airway module and is connected between the transverse output channel and the electromagnetic automatic control module.

[0042] The various gases in the pipeline are controlled by the electromagnetic automatic control module to determine whether to flow out through the rear longitudinal gas channel, and the gas on / off time is controlled according to the communication settings of the communication control module.

[0043] As an optional implementation of this application, it may also include:

[0044] The outer casing, the front air intake control system, the internal air volume distribution system and the rear air outlet system are installed on the outer casing.

[0045] Compared with the prior art, this application can bring the following technical effects:

[0046] 1. This invention employs a multi-unit integrated multi-gas ventilation system control device. Multiple gas inlet ports are connected to the inlet ports on the front face of the mixing gas channel module. Gas, distributed through the distribution channels, flows to each mass flow control unit within the module. After being proportionally adjusted as needed, the gas enters the internal cavity at the rear of the mixing gas channel module, and then flows through the longitudinal flow channel outlet to the rear-end electromagnetic automatic control module. The rear-end electromagnetic automatic control module has automatic flow recognition capabilities, controlling the valve assembly to open and close and control the disconnection time based on the gas volume required by the target reactor. This device features fewer wiring and piping points, high integration, and a short system response time, providing users with superior performance.

[0047] 2. This invention uses a multi-unit integrated modular system to accurately allocate and control the ventilation volume of various gases, which can effectively solve a series of problems such as large volume, significant accuracy error, complex and difficult-to-control wiring points, and easy leakage of existing single gas flow meters. Attached Figure Description

[0048] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application. In the drawings:

[0049] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0050] Figure 2 This is a three-dimensional structural diagram of the present invention after the outer casing has been removed;

[0051] Figure 3 This is a schematic diagram of the transverse cross-sectional structure of the present invention;

[0052] Figure 4 This is a partial cross-sectional view of the gas mass flow control module of the present invention.

[0053] Figure 5 This is a front view structural diagram of the rear end face of the rear airway module of the present invention;

[0054] Figure 6 This is a longitudinal sectional view of the present invention. Detailed Implementation

[0055] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0056] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application 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 for the embodiments of this application 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.

[0057] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0058] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0059] In addition, the term "multiple" should mean two or more.

[0060] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0061] Example

[0062] like Figure 1As shown, a multi-channel gas flow control device includes:

[0063] The front-end air intake control system 1 is used to provide multiple air intakes and control the quality of the intake air; after intake, the air enters the internal air distribution system 4 after passing through gas quality and flow control.

[0064] The internal gas distribution system 4 is used to distribute gas through a multi-channel cavity and set the gas on / off time; the internal gas distribution system 4 mainly distributes gas to the rear gas outlet system 7.

[0065] The rear-end gas outlet system 7 is used to output gas to the terminal under electromagnetic control according to a preset gas control mode; the rear-end gas outlet system 7 is equipped with a gas control system;

[0066] The front-end air intake control system 1 and the rear-end air outlet system 7 are connected in series between the internal air volume distribution system 4.

[0067] like Figure 1 As shown, the overall device is a box structure with several air inlet ports on the front side, an air outlet port on the rear side, and multi-pin wire outlet terminals on the left and right sides, which can be connected to a host computer to realize program control.

[0068] The structure and function of the aforementioned front-end air intake control system 1, internal air volume distribution system 4, and rear-end air outlet system 7 will be described in detail below.

[0069] like Figure 2 As shown, as an optional embodiment of this application, the front-end air intake control system 1 may optionally include:

[0070] The multi-way gas inlet port 2 is located on the front surface of the mixing gas channel module 5 and is used for multi-way gas intake;

[0071] The gas mass flow control module 3 is symmetrically arranged on the upper and lower end faces of the mixed gas channel module 5, and is used to quantitatively control the gas mass flow rate of the incoming gas.

[0072] This embodiment has four air inlet ports, which are correspondingly located on the front end face of the gas mixing channel module 5. The gas mixing channel module 5 has a T-shaped structure, and its interior has a front air inlet channel 16 corresponding to each air inlet port and a longitudinal distribution air passage 18 connected to the front air inlet channel 16. Air enters from the front air inlet channel 16 through the longitudinal distribution air passage 18 and then to the mass flow control unit 10 of the gas mass flow control combination module 3.

[0073] The gas mass flow control module 3 is arranged in two groups, upper and lower, and is fixed to the upper and lower ends of the strip of the mixed gas channel module 5 using screws or bolts. Each group of mixed gas channel modules 5 contains several mass flow control units 10 arranged in parallel. In this embodiment, eight mass flow control units 10 are preferred.

[0074] like Figure 2 , 3 As shown in Figure 4, as an optional embodiment of this application, the gas mass flow control module 3 may optionally include:

[0075] Several mass flow control units 10 are connected to the air inlets of the mixed gas channel module 5;

[0076] Diagonal fixing holes 14 are provided on opposite corners of the mass flow control unit 10; arranged diagonally;

[0077] The diagonal fixing post 11 is fitted into the diagonal fixing hole 14 and is used to fix the mass flow control unit 10 on the end face of the mixed gas channel module 5.

[0078] The air inlet 12 is located inside the mass flow control unit 10 and communicates with the longitudinal distribution air passage 18 of the mixed gas channel module 5; it is actually set on the side of the mass flow control unit 10 that contacts the mixed gas channel module 5 and communicates with the longitudinal distribution air passage 18 on the mixed gas channel module 5; here, a sealing connection can be achieved by directly machining a hole on the body.

[0079] The air outlet 13 is located inside the mass flow control unit 10 and is connected to the lateral output channel 27 of the mixed gas channel module 5; similarly to the air inlet 12.

[0080] Signal port 15, located on the mass flow control unit 10, is used to receive communication signals sent by the communication control module. The mass flow control unit 10 controls the incoming gas according to a preset program. The control signals received by the unit are received through signal port 15, specifically through communication with the communication control module.

[0081] like Figure 3 As shown, as an optional embodiment of this application, the internal gas distribution system 4 may optionally include:

[0082] Mixing gas channel module 5; The mixing gas channel module has a multi-channel cavity for distributing gas. Through the horizontal and vertical distribution channels of the internal cavity, the incoming gas can be diverted from many air inlets to each mass flow control unit.

[0083] The communication control module is located in the gas mixing channel module 5 and is used to control the flow ratio and on / off state of the mass flow control unit 10 and the electromagnetic automatic control module respectively according to the preset input and output control signals.

[0084] The front air intake channel 16 is located in the mixed air channel module 5, with its input end connected to the air intake port 2 and its output end connected to the longitudinal distribution air channel 18.

[0085] A lateral distribution air passage 17 is located within the mixed gas passage module 5 and is connected to the outside.

[0086] The longitudinal distribution air passage 18 is located within the mixed air passage module 5, and its output end is connected to the air inlet 12.

[0087] like Figure 2 As shown, as an optional embodiment of this application, the transverse distribution airway 17 is optionally provided with sealing plugs 19 at both ends. When internal blockage occurs in the connecting airway, the sealing plugs 19 can be removed to clear the blockage. The sealing plugs at both ends of the transverse distribution airway allow for easy unblocking of the internal cavity when gas flow is obstructed.

[0088] As an optional implementation of this application, the communication control module may include: internal electrical control circuitry and multi-pin output terminals 21, used to implement flow ratio and on / off control of the mass flow control unit 10 and the electromagnetic automatic control module respectively according to preset input and output control signals.

[0089] This embodiment:

[0090] (1) The mass flow control unit utilizes the influence of parameters such as temperature and pressure on the volume of gas to control the flow rate. Based on the principle of gas heat transfer, the control unit determines the ventilation rate and ventilation time by monitoring the heat dissipation of the airflow and the output voltage of the airflow through the sensors inside the control unit, thereby realizing the flow rate ratio control of different gases.

[0091] (2) The electromagnetic automatic control module uses the energization and de-energization of the internal coil to unidirectionally open and close the pneumatic pipeline, causing the gas to flow in a fixed direction and realizing the on-off control of the gas path.

[0092] The specific hardware application facilities of the mass flow control unit 10 and the electromagnetic automatic control module are to be selected by the user and are not limited in this embodiment.

[0093] Both the mass flow control unit 10 and the electromagnetic automatic control module are controlled by the communication control module and operate by sending control signals.

[0094] The communication control module mainly consists of internal electrical control circuit 20 and multi-pin output terminal 21. The communication control module adopts 24V safe DC power and RS485 serial communication. Under the standard communication protocol MODBUS RTU, it can maintain stable signal transmission and interaction with the outside world with a low distortion rate.

[0095] As an optional implementation of this application, the rear-end air outlet system 7 may optionally include:

[0096] The rear gas duct module 22 is mounted on the mixed gas channel module 5. The rear gas duct module 22 has a rectangular block structure, with its front end fixed to the rear end face of the mixed gas channel module 5 by fasteners. It contains channels and gas control devices corresponding to those in the mixed gas channel module 5. The rear gas duct module 22 is equipped with a rear outlet port 23, a longitudinal receiving port 24, a transverse channel 25, and a fixed connection hole 26 to the rear end face of the mixed gas channel module 5. The electromagnetic automatic control module 8 controls whether the mixed gas from the rear longitudinal gas duct 29 flows out to the terminal reactor, and controls the gas on / off time according to the communication settings of the communication control module.

[0097] Electromagnetic automatic control modules 8 are symmetrically arranged in groups on the upper and lower end faces of the rear gas channel module 22 and communicate with the communication control module; the electromagnetic automatic control modules 8 control whether the mixed gas from the rear longitudinal gas channel 29 flows out to the terminal reactor, and control the gas on / off time according to the communication settings of the communication control module.

[0098] The required gas outlet port is located on the rear gas channel module 22 and is used to discharge the required gas according to preset conditions.

[0099] The gas, distributed through the distribution channels, flows to each mass flow control unit in the module and is proportionally adjusted as needed before entering the internal cavity at the rear of the mixing gas channel module. From there, it exits through the longitudinal flow channel outlet to the rear-end electromagnetic control module. This rear-end electromagnetic control module has automatic flow recognition capabilities, controlling the valve assembly to open and close and control the disconnection time based on the gas volume required by the target reactor. The communication control module mainly includes internal electrical control circuitry, a standard RS485 serial communication port, and multi-pin output terminals located at both ends of the multi-channel gas flow control device. Through internal and external data links using the RS485 serial port, the communication control module can communicate in real-time and provide feedback to control the outlet gas flow of the electromagnetic control module.

[0100] The required gas outlet port settings are as follows:

[0101] like Figure 3 and 5 As shown, as an optional embodiment of this application, the back-end airway module 22 may optionally be provided with:

[0102] The rear air outlet port 23 is sealed and fitted on the rear end face of the rear air duct module 22; the rear air outlet port 23 is a separate air outlet port, screwed into the mounting hole on the rear end face of the rear air duct module 22 and connected to the longitudinal receiving port 24 in the rear air duct module 22.

[0103] The longitudinal receiving port 24 is located inside the rear air passage module 22 and is connected to the rear air outlet port 23; the longitudinal receiving port 24 is a stepped cylindrical hole, and a transverse channel 25 is provided on its small diameter port.

[0104] A transverse channel 25 is located within the rear airway module 22 and communicates with the longitudinal receiving port 24; both ends of the transverse channel 25 are also provided with sealing plugs.

[0105] A fixed connection hole 26 is provided on the rear end face of the rear air passage module 22, and is used to fix the rear air passage module 22 on the rear end face of the mixed gas passage module 5 with the cooperation of the fastener.

[0106] As an optional implementation of this application, the back-end airway module 22 may also be provided with:

[0107] The lateral output channel 27 is located within the rear air channel module 22, with one end connected to the longitudinal receiving port 24 and the other end connected to the air outlet 13. Gas controlled by the mass flow control unit 10 enters the lateral output channel 27 from the air outlet 13 and then reaches the longitudinal receiving port 24.

[0108] The rear longitudinal air passage 29 is located within the rear air passage module 22 and connects the transverse output channel 27 and the electromagnetic automatic control module 8. The middle part of the transverse output channel 27 forms a three-way structure, and the gas is guided to the electromagnetic automatic control module 8 through the rear longitudinal air passage 29. The electromagnetic automatic control module 8 controls whether the various gases in the pipeline flow out through the rear longitudinal air passage 29 and controls the gas on / off time according to the communication settings of the communication control module.

[0109] The lateral output channel 27, located at the rear end of the mixed gas channel module 5, extends through the front end of the rear gas channel module 22 and is connected to the lateral receiving port 24 via a standard pipe connector. Various gases in the pipeline are controlled by the electromagnetic automatic control module 8 via the rear longitudinal gas channel 29 to determine whether they flow out, and the on / off time of the gas is controlled according to the communication settings of the communication control module.

[0110] As an optional implementation of this application, it may also include:

[0111] The outer casing 28 is on which the front air intake control system 1, the internal air volume distribution system 4, and the rear air outlet system 7 are installed.

[0112] like Figure 1 As shown, in this embodiment, the front-end air intake control system 1, the internal air volume distribution system 4, and the rear-end air outlet system 7 are all fixedly installed in the outer casing 28, except for the multi-way gas inlet port 2, the multi-pin outlet terminal 21, and the rear-end air outlet port 23, which are installed in the outer casing 28, to provide overall protection for the device.

[0113] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-channel gas flow control device, characterized by, include: (1) Front-end air intake control system, used to provide multiple air intakes and control the quality of the air intake; The front-end air intake control system includes: a multi-way gas intake port, located on the front surface of the mixed gas channel module, for multi-way air intake; and a gas mass flow control combination module, symmetrically located on the upper and lower end surfaces of the mixed gas channel module, for quantitative control of the gas mass flow rate of the incoming gas. The gas mass flow control module includes: a plurality of mass flow control units connected to the gas inlets of the gas mixing channel module; diagonal fixing holes located diagonally on the mass flow control units; diagonal fixing posts fitted into the diagonal fixing holes for fixing the mass flow control units to the end face of the gas mixing channel module; an air inlet located inside the mass flow control units and connected to the longitudinal distribution gas channel of the gas mixing channel module; an air outlet located inside the mass flow control units and connected to the transverse output channel of the gas mixing channel module; and a signal port located on the mass flow control units for receiving communication signals sent by the communication control module. (2) An internal gas distribution system for distributing gas through a multi-channel cavity and setting the gas on / off time; the internal gas distribution system includes: The mixing gas channel module has a multi-channel cavity for distributing gas. The incoming gas is diverted from multiple air inlets to each mass flow control unit through the horizontal and vertical distribution channels of the internal cavity. The communication control module, located within the mixed gas channel module, is used to implement flow ratio and on / off control of the gas mass flow control combination module and the electromagnetic automatic control module respectively according to preset input and output control signals. The front air intake channel is located within the mixed air channel module, with its input end connected to the air intake port and its output end connected to the longitudinal distribution air channel. A lateral distribution air passage is located within the mixed gas passage module and is connected to the outside. A longitudinally distributed air passage is located within the mixed air passage module, and its output end is connected to the air inlet. (3) The back-end gas outlet system is used to output gas to the terminal under electromagnetic control according to a preset gas control mode; The rear-end air outlet system includes: A rear-end air duct module is disposed on the mixed-gas channel module. The rear-end air duct module has a rectangular block structure, with its front end fixed to the rear end face of the mixed-gas channel module by a fastener. It contains a channel and air control device corresponding to those in the mixed-gas channel module. The rear-end air duct module is provided with: a rear-end air outlet port, which is sealed to the rear end face of the rear-end air duct module; a longitudinal receiving port, which is disposed within the rear-end air duct module and communicates with the rear-end air outlet port; and a transverse channel, which is disposed within the rear-end air duct module and communicates with the longitudinal receiving port. Both ends of the transverse channel are also sealed. A plug; a fixed connection hole, located on the rear end face of the rear end air duct module, used to fix the rear end air duct module to the rear end face of the mixed gas channel module with the cooperation of a fastener; a transverse output channel, located inside the rear end air duct module, with one end connected to the longitudinal receiving port and the other end connected to the air outlet; a rear longitudinal air duct, located inside the rear end air duct module, connecting the transverse output channel and the electromagnetic automatic control module; multiple gases in the pipeline are controlled by the electromagnetic automatic control module to determine whether to flow out through the rear longitudinal air duct, and the on / off time of the gas is controlled according to the communication settings of the communication control module; Electromagnetic automatic control modules are symmetrically arranged in groups on the upper and lower end faces of the rear gas duct module and communicate with the communication control module; the electromagnetic automatic control module controls whether the mixed gas from the rear longitudinal gas duct flows out to the terminal reactor, and controls the gas on / off time according to the communication settings of the communication control module. The required gas outlet port is located on the rear gas channel module and is used to discharge the required gas according to preset conditions. The front-end air intake control system and the rear-end air outlet system are connected in series between the internal air volume distribution system.

2. A multi-channel gas flow control device as claimed in claim 1, characterized in that The transverse distribution air passage is equipped with sealing plugs at both ends. When the connecting air passage becomes internally blocked, the sealing plugs can be removed to clear the blockage.

3. A multi-channel gas flow control device as defined in claim 1, wherein, The communication control module includes: internal electrical control circuitry and multi-pin output terminals, used to implement flow ratio and on / off control of the mass flow control unit and the electromagnetic automatic control module respectively according to preset input and output control signals.

4. A multi-channel gas flow control device as described in any one of claims 1-3, characterized in that, Also includes: The outer casing, the front air intake control system, the internal air volume distribution system and the rear air outlet system are installed on the outer casing.

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