Multi-channel oxygen flow accurate adjusting system

Abstract

The utility model provides a multi-channel oxygen flow accurate adjusting system which comprises a gas flow quality adjusting valve, a multi-channel control unit, M gas flow valves, M one-way valves, M aeration discs and M pressure gauges. The gas inlet end of the gas flow quality regulating valve is connected with a first gas source, the gas outlet end of the gas flow quality regulating valve is connected with the gas inlet end of the mth gas flow valve, the gas outlet end of the mth gas flow valve is connected with the gas inlet end of the mth one-way valve, and the gas outlet end of the mth one-way valve is connected with the mth aeration disc; an mth pressure gauge is arranged on a pipeline between the gas outlet end of the mth gas flow valve and the gas inlet end of the mth one-way valve; m is a positive integer smaller than or equal to M. According to the utility model, gas flow can be subjected to multi-channel distribution, and different aeration rates of each aeration disc can be controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture, in particular to a multi-channel oxygen flow precision regulation system. Background Art

[0002] In the aquaculture industry, especially in aquaculture, oxygen is a key factor for the survival and growth of cultured organisms. Traditional aquaculture methods often rely on manual observation and empirical judgment to adjust the oxygen content. This method is not only inefficient but also difficult to ensure accuracy. Therefore, the development and application of a multi-channel oxygen flow precision regulation system have become an important means to improve the production efficiency of the aquaculture industry and the quality of cultured organisms. Summary of the Utility Model

[0003] The utility model aims to solve at least the technical problems existing in the prior art, and particularly innovatively provides a multi-channel oxygen flow precision regulation system.

[0004] To achieve the above object of the utility model, the utility model provides a multi-channel oxygen flow precision regulation system, including a gas flow mass regulating valve, a multi-channel control unit, M gas flow valves, M one-way valves, M aeration discs, and M pressure gauges; M is a positive integer greater than or equal to 2;

[0005] The M gas flow valves are respectively the first gas flow valve, the second gas flow valve, the third gas flow valve,..., the Mth gas flow valve;

[0006] The M one-way valves are respectively the first one-way valve, the second one-way valve, the third one-way valve,..., the Mth one-way valve;

[0007] The M aeration discs are respectively the first aeration disc, the second aeration disc, the third aeration disc,..., the Mth aeration disc;

[0008] The M pressure gauges are respectively the first pressure gauge, the second pressure gauge, the third pressure gauge,..., the Mth pressure gauge;

[0009] The intake end of the gas flow mass regulating valve is connected to the first gas source, the outlet end of the gas flow mass regulating valve is connected to the intake end of the mth gas flow valve, the outlet end of the mth gas flow valve is connected to the intake end of the mth one-way valve, and the outlet end of the mth one-way valve is connected to the mth aeration disc; a mth pressure gauge is provided on the pipeline between the outlet end of the mth gas flow valve and the intake end of the mth one-way valve; m is a positive integer less than or equal to M;

[0010] The control end of the gas flow mass regulating valve of the multi-channel control unit is connected to the control end of the gas flow mass regulating valve. The control end of the m-th gas flow valve of the multi-channel control unit is connected to the control end of the m-th gas flow valve. The m-th pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the m-th pressure gauge.

[0011] That is, the inlet end of the gas flow mass regulating valve is connected to the first gas source, and the outlet end of the gas flow mass regulating valve is respectively connected to the inlet ends of the first gas flow valve, the second gas flow valve, the third gas flow valve, ……, the M-th gas flow valve.

[0012] The outlet end of the first gas flow valve is connected to the inlet end of the first one-way valve. The outlet end of the second gas flow valve is connected to the inlet end of the second one-way valve. The outlet end of the third gas flow valve is connected to the inlet end of the third one-way valve. ……, The outlet end of the M-th gas flow valve is connected to the inlet end of the M-th one-way valve.

[0013] The outlet end of the first one-way valve is connected to the first aeration disc. The outlet end of the second one-way valve is connected to the second aeration disc. The outlet end of the third one-way valve is connected to the third aeration disc. ……, The outlet end of the M-th one-way valve is connected to the M-th aeration disc.

[0014] A first pressure gauge is provided on the pipeline between the outlet end of the first gas flow valve and the inlet end of the first one-way valve. A second pressure gauge is provided on the pipeline between the outlet end of the second gas flow valve and the inlet end of the second one-way valve. A third pressure gauge is provided on the pipeline between the outlet end of the third gas flow valve and the inlet end of the third one-way valve. ……, An M-th pressure gauge is provided on the pipeline between the outlet end of the M-th gas flow valve and the inlet end of the M-th one-way valve.

[0015] The control end of the gas flow mass regulating valve of the multi-channel control unit is connected to the control end of the gas flow mass regulating valve. The control end of the first gas flow valve of the multi-channel control unit is connected to the control end of the first gas flow valve. The control end of the second gas flow valve of the multi-channel control unit is connected to the control end of the second gas flow valve. The control end of the third gas flow valve of the multi-channel control unit is connected to the control end of the third gas flow valve. ……, The control end of the M-th gas flow valve of the multi-channel control unit is connected to the control end of the M-th gas flow valve.

[0016] The first pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the first pressure gauge. The second pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the second pressure gauge. The third pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the third pressure gauge. ……, The M-th pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the M-th pressure gauge.

[0017] When the multi-channel control unit sends an opening degree of φ to the m-th gas flow valve m the opening degree of the first gas flow valve is φ m so that the opening degree range of the m-th gas flow valve can be controlled from 0 to φ max where φ max is the maximum opening degree, and corresponding signals can be sent according to actual requirements to achieve aeration and oxygenation.

[0018] In a preferred embodiment of the present invention, the gas flow valve is a gas flow valve with adjustable opening degree.

[0019] In a preferred embodiment of the present invention, when M = 5:

[0020] The intake end of the gas flow quality regulating valve is connected to the first gas source, and the outlet ends of the gas flow quality regulating valve are respectively connected to the intake ends of the first gas flow valve, the second gas flow valve, the third gas flow valve, the fourth gas flow valve, and the fifth gas flow valve;

[0021] The outlet end of the first gas flow valve is connected to the intake end of the first one-way valve, the outlet end of the second gas flow valve is connected to the intake end of the second one-way valve, the outlet end of the third gas flow valve is connected to the intake end of the third one-way valve, the outlet end of the fourth gas flow valve is connected to the intake end of the fourth one-way valve, and the outlet end of the fifth gas flow valve is connected to the intake end of the fifth one-way valve;

[0022] The outlet end of the first one-way valve is connected to the first aeration disc, the outlet end of the second one-way valve is connected to the second aeration disc, the outlet end of the third one-way valve is connected to the third aeration disc, the outlet end of the fourth one-way valve is connected to the fourth aeration disc, and the outlet end of the fifth one-way valve is connected to the fifth aeration disc;

[0023] A first pressure gauge is provided on the pipeline between the outlet end of the first gas flow valve and the intake end of the first one-way valve; a second pressure gauge is provided on the pipeline between the outlet end of the second gas flow valve and the intake end of the second one-way valve; a third pressure gauge is provided on the pipeline between the outlet end of the third gas flow valve and the intake end of the third one-way valve; a fourth pressure gauge is provided on the pipeline between the outlet end of the fourth gas flow valve and the intake end of the fourth one-way valve; a fifth pressure gauge is provided on the pipeline between the outlet end of the fifth gas flow valve and the intake end of the fifth one-way valve;

[0024] The control end of the gas flow mass regulating valve of the multi-channel control unit is connected to the control end of the gas flow mass regulating valve. The control end of the first gas flow valve of the multi-channel control unit is connected to the control end of the first gas flow valve. The control end of the second gas flow valve of the multi-channel control unit is connected to the control end of the second gas flow valve. The control end of the third gas flow valve of the multi-channel control unit is connected to the control end of the third gas flow valve. The control end of the fourth gas flow valve of the multi-channel control unit is connected to the control end of the fourth gas flow valve. The control end of the fifth gas flow valve of the multi-channel control unit is connected to the control end of the fifth gas flow valve;

[0025] The acquisition end of the first pressure gauge of the multi-channel control unit is connected to the acquisition end of the first pressure gauge. The acquisition end of the second pressure gauge of the multi-channel control unit is connected to the acquisition end of the second pressure gauge. The acquisition end of the third pressure gauge of the multi-channel control unit is connected to the acquisition end of the third pressure gauge. The acquisition end of the fourth pressure gauge of the multi-channel control unit is connected to the acquisition end of the fourth pressure gauge. The acquisition end of the fifth pressure gauge of the multi-channel control unit is connected to the acquisition end of the fifth pressure gauge.

[0026] In a preferred embodiment of the present utility model, it further includes a normally open solenoid valve and a (M + 1)-th check valve;

[0027] The intake end of the normally open solenoid valve is connected to the second gas source. The outlet end of the normally open solenoid valve is connected to the intake end of the (M + 1)-th check valve. The outlet end of the (M + 1)-th check valve is connected to the outlet end of the m-th check valve;

[0028] The control end of the normally open solenoid valve of the multi-channel control unit is connected to the control end of the normally open solenoid valve.

[0029] That is, the intake end of the normally open solenoid valve is connected to the second gas source. The outlet end of the normally open solenoid valve is connected to the intake end of the sixth check valve. The outlet end of the sixth check valve is respectively connected to the outlet ends of the first check valve, the second check valve, the third check valve,..., the M-th check valve. The control end of the normally open solenoid valve of the multi-channel control unit is connected to the control end of the normally open solenoid valve. When a power outage occurs, or the battery cannot supply power, or a fault occurs, at this time, the second gas source stored in the liquefied gas tank passes through the pressure reducing valve on the liquefied gas tank and then enters the normally open solenoid valve channel, and then enters the first aeration disk, the second aeration disk, the third aeration disk,..., the M-th aeration disk respectively through the (M + 1)-th check valve.

[0030] In a preferred embodiment of the present utility model, when M = 5:

[0031] The intake end of the normally open solenoid valve is connected to the second gas source, and the outlet end of the normally open solenoid valve is connected to the intake end of the sixth one-way valve; the outlet end of the sixth one-way valve is respectively connected to the outlet ends of the first one-way valve, the second one-way valve, the third one-way valve, the fourth one-way valve, and the fifth one-way valve; the normally open solenoid valve control end of the multi-channel control unit is connected to the control end of the normally open solenoid valve.

[0032] In a preferred embodiment of the present utility model, the second gas source is liquid air.

[0033] In a preferred embodiment of the present utility model, the first gas source and the second gas source are the same gas source. At this time, the intake end of the gas flow mass regulating valve is connected to the gas source, the intake end of the normally open solenoid valve is connected to the gas source, and the other connections are the same; when the gas flow mass regulating valve fails, the normally open solenoid valve changes from the channel closed state to the channel unblocked state. At this time, the gas source passes through the normally open solenoid valve channel and then enters the first aeration disc, the second aeration disc, the third aeration disc, the fourth aeration disc, and the Mth aeration disc through the (M + 1)th one-way valve respectively.

[0034] In summary, due to the adoption of the above technical solution, the present utility model can perform multi-channel distribution of gas flow and can achieve control of different aeration volumes of each aeration disc.

[0035] The additional aspects and advantages of the present utility model will be partially given in the following description, partially will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0036] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0037] Figure 1 is the connection schematic block diagram of the present utility model.

[0038] Figure 2 is the connection schematic block diagram of the present utility model. Detailed Embodiment

[0039] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and cannot be understood as a limitation of the present utility model.

[0040] The utility model provides a multi-channel oxygen flow precise adjustment system, which includes a gas flow mass control valve, a multi-channel control unit, M gas flow valves, M one-way valves, M aeration discs, and M pressure gauges; M is a positive integer greater than or equal to 2; and a normally open solenoid valve and an (M + 1)-th one-way valve;

[0041] The M gas flow valves are respectively the first gas flow valve, the second gas flow valve, the third gas flow valve,..., the M-th gas flow valve;

[0042] The M one-way valves are respectively the first one-way valve, the second one-way valve, the third one-way valve,..., the M-th one-way valve;

[0043] The M aeration discs are respectively the first aeration disc, the second aeration disc, the third aeration disc,..., the M-th aeration disc;

[0044] The M pressure gauges are respectively the first pressure gauge, the second pressure gauge, the third pressure gauge,..., the M-th pressure gauge;

[0045] The intake end of the gas flow mass control valve is connected to the first gas source, the outlet end of the gas flow mass control valve is connected to the intake end of the m-th gas flow valve, the outlet end of the m-th gas flow valve is connected to the intake end of the m-th one-way valve, and the outlet end of the m-th one-way valve is connected to the m-th aeration disc; a m-th pressure gauge is arranged on the pipeline between the outlet end of the m-th gas flow valve and the intake end of the m-th one-way valve; m is a positive integer less than or equal to M;

[0046] The intake end of the normally open solenoid valve is connected to the second gas source, the outlet end of the normally open solenoid valve is connected to the intake end of the (M + 1)-th one-way valve, and the outlet end of the (M + 1)-th one-way valve is connected to the outlet end of the m-th one-way valve;

[0047] The gas flow mass control valve control end of the multi-channel control unit is connected to the control end of the gas flow mass control valve, the m-th gas flow valve control end of the multi-channel control unit is connected to the control end of the m-th gas flow valve, the m-th pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the m-th pressure gauge; the normally open solenoid valve control end of the multi-channel control unit is connected to the control end of the normally open solenoid valve.

[0048] As Figure 1 shown, the intake end of the gas flow mass control valve is connected to the first gas source, and the outlet end of the gas flow mass control valve is respectively connected to the intake ends of the first gas flow valve, the second gas flow valve, the third gas flow valve,..., the M-th gas flow valve;

[0049] The outlet end of the first gas flow valve is connected to the inlet end of the first one-way valve. The outlet end of the second gas flow valve is connected to the inlet end of the second one-way valve. The outlet end of the third gas flow valve is connected to the inlet end of the third one-way valve, ……, The outlet end of the Mth gas flow valve is connected to the inlet end of the Mth one-way valve;

[0050] The outlet end of the first one-way valve is connected to the first aeration disc. The outlet end of the second one-way valve is connected to the second aeration disc. The outlet end of the third one-way valve is connected to the third aeration disc, ……, The outlet end of the Mth one-way valve is connected to the Mth aeration disc;

[0051] A first pressure gauge is provided on the pipeline between the outlet end of the first gas flow valve and the inlet end of the first one-way valve; A second pressure gauge is provided on the pipeline between the outlet end of the second gas flow valve and the inlet end of the second one-way valve; A third pressure gauge is provided on the pipeline between the outlet end of the third gas flow valve and the inlet end of the third one-way valve, ……; A Mth pressure gauge is provided on the pipeline between the outlet end of the Mth gas flow valve and the inlet end of the Mth one-way valve;

[0052] The inlet end of the normally open solenoid valve is connected to the second gas source. The outlet end of the normally open solenoid valve is connected to the inlet end of the sixth one-way valve; The outlet end of the sixth one-way valve is respectively connected to the outlet ends of the first one-way valve, the second one-way valve, the third one-way valve, ……, the Mth one-way valve;

[0053] The gas flow quality regulating valve control end of the multi-channel control unit is connected to the control end of the gas flow quality regulating valve. The first gas flow valve control end of the multi-channel control unit is connected to the control end of the first gas flow valve. The second gas flow valve control end of the multi-channel control unit is connected to the control end of the second gas flow valve. The third gas flow valve control end of the multi-channel control unit is connected to the control end of the third gas flow valve, ……, The Mth gas flow valve control end of the multi-channel control unit is connected to the control end of the Mth gas flow valve;

[0054] The first pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the first pressure gauge. The second pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the second pressure gauge. The third pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the third pressure gauge, ……, The Mth pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the Mth pressure gauge; The normally open solenoid valve control end of the multi-channel control unit is connected to the control end of the normally open solenoid valve.

[0055] When M = 5, as Figure 2As shown, the intake end of the gas flow quality regulating valve is connected to the first gas source, and the outlet end of the gas flow quality regulating valve is respectively connected to the intake ends of the first gas flow valve, the second gas flow valve, the third gas flow valve, the fourth gas flow valve, and the fifth gas flow valve;

[0056] The outlet end of the first gas flow valve is connected to the intake end of the first check valve, the outlet end of the second gas flow valve is connected to the intake end of the second check valve, the outlet end of the third gas flow valve is connected to the intake end of the third check valve, the outlet end of the fourth gas flow valve is connected to the intake end of the fourth check valve, and the outlet end of the fifth gas flow valve is connected to the intake end of the fifth check valve;

[0057] The outlet end of the first check valve is connected to the first aeration disc, the outlet end of the second check valve is connected to the second aeration disc, the outlet end of the third check valve is connected to the third aeration disc, the outlet end of the fourth check valve is connected to the fourth aeration disc, and the outlet end of the fifth check valve is connected to the fifth aeration disc;

[0058] A first pressure gauge is provided on the pipeline between the outlet end of the first gas flow valve and the intake end of the first check valve; a second pressure gauge is provided on the pipeline between the outlet end of the second gas flow valve and the intake end of the second check valve; a third pressure gauge is provided on the pipeline between the outlet end of the third gas flow valve and the intake end of the third check valve; a fourth pressure gauge is provided on the pipeline between the outlet end of the fourth gas flow valve and the intake end of the fourth check valve; a fifth pressure gauge is provided on the pipeline between the outlet end of the fifth gas flow valve and the intake end of the fifth check valve;

[0059] The intake end of the normally open solenoid valve is connected to the second gas source, and the outlet end of the normally open solenoid valve is connected to the intake end of the sixth check valve; the outlet end of the sixth check valve is respectively connected to the outlet ends of the first check valve, the second check valve, the third check valve, the fourth check valve, and the fifth check valve;

[0060] The gas flow quality regulating valve control end of the multi-channel control unit is connected to the control end of the gas flow quality regulating valve, the first gas flow valve control end of the multi-channel control unit is connected to the control end of the first gas flow valve, the second gas flow valve control end of the multi-channel control unit is connected to the control end of the second gas flow valve, the third gas flow valve control end of the multi-channel control unit is connected to the control end of the third gas flow valve, the fourth gas flow valve control end of the multi-channel control unit is connected to the control end of the fourth gas flow valve, and the fifth gas flow valve control end of the multi-channel control unit is connected to the control end of the fifth gas flow valve;

[0061] The acquisition end of the first pressure gauge of the multi-channel control unit is connected to the acquisition end of the first pressure gauge, the acquisition end of the second pressure gauge of the multi-channel control unit is connected to the acquisition end of the second pressure gauge, the acquisition end of the third pressure gauge of the multi-channel control unit is connected to the acquisition end of the third pressure gauge, the acquisition end of the fourth pressure gauge of the multi-channel control unit is connected to the acquisition end of the fourth pressure gauge, and the acquisition end of the fifth pressure gauge of the multi-channel control unit is connected to the acquisition end of the fifth pressure gauge; the normally open solenoid valve control end of the multi-channel control unit is connected to the control end of the normally open solenoid valve.

[0062] When a power outage occurs or the gas flow mass control valve fails, the normally open solenoid valve changes from a channel-closed state to a channel-open state. At this time, the second gas source stored in the liquefied gas tank passes through the pressure reducing valve on the liquefied gas tank and then through the normally open solenoid valve channel, and then enters the first aeration disc, the second aeration disc, the third aeration disc, the fourth aeration disc, and the fifth aeration disc respectively through the sixth one-way valve.

[0063] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A multi-channel oxygen flow precise adjustment system, comprising a gas flow mass regulating valve, a multi-channel control unit, M gas flow valves, M one-way valves, M aeration discs, and M pressure gauges; M is a positive integer greater than or equal to 2; The M gas flow valves are respectively the 1st gas flow valve, the 2nd gas flow valve, the 3rd gas flow valve,..., the Mth gas flow valve; The M one-way valves are respectively the 1st one-way valve, the 2nd one-way valve, the 3rd one-way valve,..., the Mth one-way valve; The M aeration discs are respectively the 1st aeration disc, the 2nd aeration disc, the 3rd aeration disc,..., the Mth aeration disc; The M pressure gauges are respectively the 1st pressure gauge, the 2nd pressure gauge, the 3rd pressure gauge,..., the Mth pressure gauge; Characterized in that, The inlet end of the gas flow mass regulating valve is connected to the first gas source, the outlet end of the gas flow mass regulating valve is connected to the inlet end of the mth gas flow valve, the outlet end of the mth gas flow valve is connected to the inlet end of the mth one-way valve, and the outlet end of the mth one-way valve is connected to the mth aeration disc; a mth pressure gauge is provided on the pipeline between the outlet end of the mth gas flow valve and the inlet end of the mth one-way valve; m is a positive integer less than or equal to M; The gas flow mass regulating valve control end of the multi-channel control unit is connected to the control end of the gas flow mass regulating valve, the mth gas flow valve control end of the multi-channel control unit is connected to the control end of the mth gas flow valve, and the mth pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the mth pressure gauge.

2. The multi-channel oxygen flow precise adjustment system according to claim 1, wherein The gas flow valve is a gas flow valve with adjustable opening.

3. The multi-channel oxygen flow precise adjustment system according to claim 1, wherein When M is 5: The inlet end of the gas flow mass regulating valve is connected to the first gas source, and the outlet end of the gas flow mass regulating valve is respectively connected to the inlet ends of the 1st gas flow valve, the 2nd gas flow valve, the 3rd gas flow valve, the 4th gas flow valve, and the 5th gas flow valve; The outlet end of the 1st gas flow valve is connected to the inlet end of the 1st one-way valve, the outlet end of the 2nd gas flow valve is connected to the inlet end of the 2nd one-way valve, the outlet end of the 3rd gas flow valve is connected to the inlet end of the 3rd one-way valve, the outlet end of the 4th gas flow valve is connected to the inlet end of the 4th one-way valve, and the outlet end of the 5th gas flow valve is connected to the inlet end of the 5th one-way valve; The outlet end of the 1st one-way valve is connected to the 1st aeration disc, the outlet end of the 2nd one-way valve is connected to the 2nd aeration disc, the outlet end of the 3rd one-way valve is connected to the 3rd aeration disc, the outlet end of the 4th one-way valve is connected to the 4th aeration disc, and the outlet end of the 5th one-way valve is connected to the 5th aeration disc; A 1st pressure gauge is provided on the pipeline between the outlet end of the 1st gas flow valve and the inlet end of the 1st one-way valve; a 2nd pressure gauge is provided on the pipeline between the outlet end of the 2nd gas flow valve and the inlet end of the 2nd one-way valve; a 3rd pressure gauge is provided on the pipeline between the outlet end of the 3rd gas flow valve and the inlet end of the 3rd one-way valve; a 4th pressure gauge is provided on the pipeline between the outlet end of the 4th gas flow valve and the inlet end of the 4th one-way valve; a 5th pressure gauge is provided on the pipeline between the outlet end of the 5th gas flow valve and the inlet end of the 5th one-way valve; The control end of the gas flow mass regulating valve of the multi-channel control unit is connected to the control end of the gas flow mass regulating valve. The control end of the first gas flow valve of the multi-channel control unit is connected to the control end of the first gas flow valve. The control end of the second gas flow valve of the multi-channel control unit is connected to the control end of the second gas flow valve. The control end of the third gas flow valve of the multi-channel control unit is connected to the control end of the third gas flow valve. The control end of the fourth gas flow valve of the multi-channel control unit is connected to the control end of the fourth gas flow valve. The control end of the fifth gas flow valve of the multi-channel control unit is connected to the control end of the fifth gas flow valve; The first pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the first pressure gauge. The second pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the second pressure gauge. The third pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the third pressure gauge. The fourth pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the fourth pressure gauge. The fifth pressure gauge acquisition end of the multi-channel control unit is connected to the acquisition end of the fifth pressure gauge.

4. The multi-channel oxygen flow precise adjustment system according to claim 1, characterized in that, It also includes a normally open solenoid valve and a (M + 1)-th check valve; The intake end of the normally open solenoid valve is connected to the second gas source. The outlet end of the normally open solenoid valve is connected to the intake end of the (M + 1)-th check valve. The outlet end of the (M + 1)-th check valve is connected to the outlet end of the m-th check valve; The normally open solenoid valve control end of the multi-channel control unit is connected to the control end of the normally open solenoid valve.

5. The multi-channel oxygen flow precise adjustment system according to claim 1, wherein When M = 5: The intake end of the normally open solenoid valve is connected to the second gas source. The outlet end of the normally open solenoid valve is connected to the intake end of the 6-th check valve; The outlet end of the 6-th check valve is connected to the outlet ends of the first check valve, the second check valve, the third check valve, the fourth check valve, and the fifth check valve; The normally open solenoid valve control end of the multi-channel control unit is connected to the control end of the normally open solenoid valve.

6. The multi-channel oxygen flow precise adjustment system according to claim 1, characterized in that The second gas source is liquid air.

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