A control system of a micro hyperbaric oxygen chamber and a micro hyperbaric oxygen chamber system

Abstract

The present invention discloses a control system for a micro-high pressure oxygen chamber and a micro-high pressure oxygen chamber system. The control system includes: a main control unit for adjusting the opening degree of a pressure regulating valve to maintain the air pressure in the micro-high pressure oxygen chamber within a set pressure range when the air pressure data of the micro-high pressure oxygen chamber is not greater than a first preset pressure threshold, and controlling a first pressure relief valve to be in an open state when the air pressure data is greater than the first preset pressure threshold; an overpressure detection unit for controlling a second pressure relief valve to be in an open state when the air pressure data is greater than a second preset pressure threshold; an overpressure protection unit for controlling a third pressure relief valve to be in an open state when the air pressure data is greater than a third preset pressure threshold, and controlling a relay switch to disconnect the circuit between the compressor and the power supply. In this application, three different air pressure control methods are adopted, which can quickly and effectively control the air pressure drop in the micro-high pressure oxygen chamber and improve the safety of the micro-high pressure oxygen chamber.

Description

Technical Field

[0001] The present invention relates to the field of oxygen therapy equipment, and particularly to a control system for a micro-hyperbaric oxygen chamber and a micro-hyperbaric oxygen chamber system. Background Art

[0002] The micro-hyperbaric oxygen chamber, as an oxygen therapy equipment, has been widely applied in the market; the micro-hyperbaric oxygen chamber has a sealed chamber body; pure oxygen is introduced into the chamber body through an oxygen generation device, and at the same time, compressed micro-high-pressure gas is introduced into the chamber body through a compressor, so as to form a high-concentration oxygen and micro-positive pressure environment inside the chamber body; after a patient enters the chamber body, the micro-positive pressure environment can effectively increase the oxygen partial pressure in the alveoli, improve the oxygen intake in the patient's body, increase the intake in the patient's body so as to promote the absorption and utilization of oxygen, and further improve the oxygen therapy effect.

[0003] During the treatment process of the micro-hyperbaric oxygen chamber, the pressure value inside the chamber needs to be accurately maintained within a certain range to ensure the treatment effect and personal safety of the patient; and as a pressure-bearing manned device, the micro-hyperbaric oxygen chamber requires a higher level of safety supervision. Once the pressure inside the chamber is too high, a safety accident will occur. Therefore, how to effectively avoid the problem of excessive pressure inside the micro-hyperbaric oxygen chamber and ensure the safety of the personnel inside the chamber is one of the key issues that the industry needs to focus on. Summary of the Invention

[0004] The purpose of the present invention is to provide a control system for a micro-hyperbaric oxygen chamber and a micro-hyperbaric oxygen chamber system, which can improve the safety during the use of the micro-hyperbaric oxygen chamber to a certain extent.

[0005] To solve the above technical problems, the present invention provides a control system for a micro-hyperbaric oxygen chamber, including:

[0006] A main control unit, a pressure sensor for collecting the air pressure data inside the micro-hyperbaric oxygen chamber, a pressure regulating valve, and a first pressure relief valve; the pressure regulating valve is arranged on the pressure regulating pipeline of the micro-hyperbaric oxygen chamber, and the first pressure relief valve is arranged on the first pressure relief pipeline communicated with the micro-hyperbaric oxygen chamber;

[0007] The main control unit is used to adjust the opening degree of the pressure regulating valve when the air pressure data is not greater than a first preset pressure threshold, so as to maintain the air pressure inside the micro-hyperbaric oxygen chamber within a set pressure range, and when the air pressure data is greater than the first preset pressure threshold, control the first pressure relief valve to be in an open state;

[0008] An overpressure detection unit and a second pressure relief valve; the second pressure relief valve is arranged on the second pressure relief pipeline communicated with the micro-hyperbaric oxygen chamber;

[0009] The overpressure detection unit is used to control the second pressure relief valve to be in an open state when the air pressure data is greater than a second preset pressure threshold;

[0010] An overpressure protection unit, a relay switch, and a third pressure relief valve; the third pressure relief valve is arranged on a third pressure relief pipeline communicated with the micro high-pressure oxygen chamber;

[0011] The overpressure protection unit is used for controlling the third pressure relief valve to be in an open state and controlling the relay switch to disconnect the circuit between the compressor and the power supply when the air pressure data is greater than a third preset pressure threshold; wherein, the second preset pressure threshold is not less than the first preset pressure threshold; the third preset pressure threshold is not less than the second preset pressure threshold.

[0012] In an optional embodiment of the present application, the overpressure detection unit is further used for controlling the main control unit to reset and restart when the pressure data measured by the air pressure sensor is greater than the second preset pressure threshold.

[0013] In an optional embodiment of the present application, the overpressure detection unit and the main control unit are two MCU chips integrally arranged on the same circuit board.

[0014] In an optional embodiment of the present application, an alarm connected to the main control unit is further included;

[0015] The main control unit is used for periodically sending a detection signal to the air pressure sensor, and if the measured value fed back by the air pressure sensor is not received within a set time or there is a deviation in the received measured value, it is determined to control the alarm to give an alarm.

[0016] In an optional embodiment of the present application, the main control unit is further connected with a remote control device;

[0017] The main control unit is used for uploading the received measured value to the remote control device.

[0018] In an optional embodiment of the present application, the air pressure sensor includes a first air pressure sensor connected to the main control unit, a second air pressure sensor connected to the overpressure detection unit, and a third air pressure sensor connected to the overpressure protection unit.

[0019] In an optional embodiment of the present application, the overpressure protection unit includes:

[0020] An overpressure comparison circuit with an input end connected to the output end of the air pressure sensor, a first output end of the overpressure comparison circuit connected to a control input end of the relay switch; a second output end of the overpressure comparison circuit connected to a control input end of the third pressure relief valve;

[0021] The overvoltage comparison circuit includes a zero-crossing comparator; the inverting input terminal of the zero-crossing comparator is connected to a set DC voltage, and the non-inverting input terminal is connected to the output terminal of the air pressure sensor.

[0022] In an alternative embodiment of the present application, the overvoltage protection unit includes a dual voltage comparator, a first overvoltage circuit and a second overvoltage circuit respectively connected to two input terminals of the dual voltage comparator; the input terminals of the first overvoltage circuit and the second overvoltage circuit are both connected to the output terminal of the air pressure sensor; and the circuit structures of the first overvoltage circuit and the second overvoltage circuit are the same;

[0023] The first overvoltage circuit includes a first resistor, a second resistor, a third resistor, a first capacitor and a second capacitor; wherein, the first resistor is an adjustable resistor; the first end of the first resistor, the first end of the first capacitor, the first end of the second resistor and the first end of the third resistor are all connected to a first DC voltage terminal; the second end of the first resistor, the second end of the first capacitor and the second end of the second capacitor are commonly grounded; the sliding end of the first resistor is connected to the first inverting input terminal of the dual voltage comparator; the second end of the second resistor and the first end of the second capacitor are commonly used as the input terminal of the first overvoltage circuit and connected to the output terminal of the air pressure sensor, and are also connected to the first non-inverting input terminal of the dual voltage comparator; the second end of the third resistor and the first output terminal of the dual voltage comparator are commonly connected to the control input terminal of the relay switch; the second output terminal of the dual voltage comparator is connected to the control input terminal of the third pressure relief valve.

[0024] In an alternative embodiment of the present application, a first switch circuit is further provided between the first output terminal of the dual voltage comparator and the control input terminal of the relay switch; a second switch circuit is further provided between the second output terminal of the dual voltage comparator and the control input terminal of the third pressure relief valve; the circuit structures of the first switch circuit and the second switch circuit are the same;

[0025] The first switch circuit includes a fourth resistor, a fifth resistor, an NMOS transistor and a diode. Among them, the first end of the fourth resistor is connected to the first output terminal of the dual voltage comparator, the second end of the fourth resistor is connected to the first end of the fifth resistor and the gate of the NMOS transistor; the second end of the fifth resistor and the source of the NMOS transistor are commonly grounded; the drain of the NMOS transistor is connected to the anode of the diode, and the cathode of the diode is connected to a second DC voltage terminal; the drain of the NMOS transistor is used as the output terminal of the first switch circuit and connected to the control input terminal of the relay switch.

[0026] A micro-high pressure oxygen chamber system includes a micro-high pressure oxygen chamber, a control system for the micro-high pressure oxygen chamber as described in any one of the above, and a pressure regulating pipeline, a first pressure relief pipeline, a second pressure relief pipeline, and a third pressure relief pipeline that are connected to the inside of the micro-high pressure oxygen chamber; wherein, a pressure regulating valve, a first pressure relief valve, a second pressure relief valve, and a third pressure relief valve in the control system of the micro-high pressure oxygen chamber are respectively arranged on the pressure regulating pipeline, the first pressure relief pipeline, the second pressure relief pipeline, and the third pressure relief pipeline.

[0027] A control system for a micro-high pressure oxygen chamber and a micro-high pressure oxygen chamber system provided by the present invention. The control system includes: a main control unit, a pressure sensor for collecting air pressure data inside the micro-high pressure oxygen chamber, a pressure regulating valve, and a first pressure relief valve; the pressure regulating valve is arranged on the pressure regulating pipeline of the micro-high pressure oxygen chamber, and the first pressure relief valve is arranged on the first pressure relief pipeline connected to the micro-high pressure oxygen chamber; the main control unit is used to adjust the opening degree of the pressure regulating valve when the air pressure data is not greater than a first preset pressure threshold to maintain the air pressure inside the micro-high pressure oxygen chamber within a set pressure range, and when the air pressure data is greater than the first preset pressure threshold, control the first pressure relief valve to be in an open state; an overpressure detection unit and a second pressure relief valve; the second pressure relief valve is arranged on the second pressure relief pipeline connected to the micro-high pressure oxygen chamber; the overpressure detection unit is used to control the second pressure relief valve to be in an open state when the air pressure data is greater than a second preset pressure threshold; an overpressure protection unit, a relay switch, and a third pressure relief valve; the third pressure relief valve is arranged on the third pressure relief pipeline connected to the micro-high pressure oxygen chamber; the overpressure protection unit is used to control the third pressure relief valve to be in an open state when the air pressure data is greater than a third preset pressure threshold, and control the relay switch to disconnect the circuit between the compressor and the power supply; wherein, the second preset pressure threshold is not less than the first preset pressure threshold; the third preset pressure threshold is not less than the second preset pressure threshold.

[0028] In the present application, in order to better avoid the air pressure inside the micro-high pressure oxygen chamber from being too high, on the basis of controlling and adjusting the opening degree of the pressure regulating valve by the main control unit according to the air pressure data measured by the pressure sensor to maintain the air pressure balance inside the micro-high pressure oxygen chamber, an overpressure detection unit is further provided. Once the air pressure data measured by the pressure sensor is too large, it means that the main control unit is very likely to lose the function of adjusting the air pressure balance inside the micro-high pressure oxygen chamber due to a malfunction. At this time, the overpressure detection unit can timely control the second pressure relief valve to conduct the exhaust pipeline to exhaust the inside of the micro-high pressure oxygen chamber, thereby reducing the air pressure inside the micro-high pressure oxygen chamber; on this basis, an overpressure protection unit is also configured, which can control the pressure relief valve to relieve the pressure inside the micro-high pressure oxygen chamber simultaneously when both the main control unit and the overpressure detection unit fail. At the same time, the power supply of the compressor is further cut off, so that the compressor stops charging compressed gas into the micro-high pressure oxygen chamber, thereby quickly and effectively realizing the pressure reduction inside the micro-high pressure oxygen chamber.

[0029] It can be seen that, compared with the current conventional method of controlling the air pressure rise and fall of the micro-high-pressure oxygen chamber only through a single method, three different air pressure control methods are respectively adopted in this application, avoiding the problem of excessive air pressure in the micro-high-pressure oxygen chamber, being able to quickly and effectively control the air pressure drop in the micro-high-pressure oxygen chamber when the air pressure in the chamber is on the high side, greatly improving the safety of the micro-high-pressure oxygen chamber and being conducive to the wide application of the micro-high-pressure oxygen chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Schematic diagram of a pressurization frame of a micro-high-pressure oxygen chamber provided by an embodiment of the present application;

[0032] Figure 2 Schematic diagram of the frame structure of a control system of a micro-high-pressure oxygen chamber provided by an embodiment of the present application;

[0033] Figure 3 Schematic diagram of the circuit structure of an overpressure protection unit provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] In a conventional micro-high-pressure oxygen chamber, the controller in the main control system is a key device for maintaining the air pressure stability in the chamber. It controls and adjusts the opening degrees of valves such as pressure regulating valves in the micro-high-pressure chamber according to the air pressure data in the chamber collected by the air pressure sensor in real time by means of the PID algorithm, so as to maintain the air pressure in the micro-high-pressure oxygen chamber within a reasonable range. Once the air pressure in the micro-high-pressure oxygen chamber is too high and exceeds the adjustment ability of the controller, an alarm is directly triggered, and the staff manually adjusts various valve switches to relieve the pressure in the micro-high-pressure oxygen chamber. However, the above control method relies too much on the controller in the main control system, increasing the potential safety hazards of the micro-high-pressure oxygen chamber to a certain extent.

[0035] Therefore, in order to improve the safety of the micro-high-pressure oxygen chamber in this application, three different control units for reducing the air pressure in the chamber are adopted, which can gradually control the air pressure in the chamber, thereby improving the safety of using the micro-high-pressure oxygen chamber to a certain extent.

[0036] To enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0037] For ease of understanding, as Figure 1 shown, Figure 1 is a schematic diagram of a pressurization frame of a micro-high pressure oxygen chamber provided by an embodiment of the present application. In Figure 1 the shown embodiment, the micro-high pressure oxygen chamber 10 is configured with two groups of air compressors 13. Among them, the first group of air compressors 13 compresses the air inhaled by the air intake hood 12, and the compressed air can be selectively introduced into the oxygen generation device 11 or into the oil-water separator through a three-way valve 14; when the air compressed by the first group of air compressors 13 is introduced into the oxygen generation device 11, the oxygen generation device 11 uses the compressed air to generate pure oxygen and sequentially passes through devices such as an oxygen storage tank and a virus filter and is introduced into the micro-high pressure oxygen chamber 10 through the oxygen port; when the air compressed by the first group of air compressors 13 is introduced into the oil-water separator, it can be processed by the oil-water separator and then introduced into the micro-high pressure oxygen chamber 10 through the pressurization port. For the second group of air compressors 13, the compressed air is all processed by the oil-water separator and then introduced into the micro-high pressure oxygen chamber 10 through the pressurization port; thus, the charging process of pure oxygen and pressurized gas in the micro-high pressure oxygen chamber 10 is realized.

[0038] Based on Figure 1 the process of generating pure oxygen and pressurized gas in the micro-high pressure oxygen chamber 10 shown, as Figure 2 shown, Figure 2 is a schematic diagram of the frame structure of the control system of the micro-high pressure oxygen chamber provided by an embodiment of the present application.

[0039] In a specific embodiment of the present application, the control system of the micro-high pressure oxygen chamber may include:

[0040] a main control unit 21, a pressure sensor 20 for collecting the air pressure data in the micro-high pressure oxygen chamber 10, a pressure regulating valve 15, and a first pressure relief valve 16; the pressure regulating valve 15 is arranged on the pressure regulating pipeline of the micro-high pressure oxygen chamber 10, and the first pressure relief valve 16 is arranged on the first pressure relief pipeline communicated with the micro-high pressure oxygen chamber 10;

[0041] The main control unit 21 is used to adjust the opening degree of the pressure regulating valve 15 when the air pressure data is less than the first preset pressure threshold to maintain the air pressure in the micro-high pressure oxygen chamber 10 within the set pressure range, and control the first pressure relief valve 16 to be in an open state when the air pressure data is greater than the first preset pressure threshold;

[0042] An overpressure detection unit 22 and a second pressure relief valve 17; the second pressure relief valve 17 is arranged on a second pressure relief pipeline communicated with the micro high-pressure oxygen chamber 10;

[0043] The overpressure detection unit 22 is used for controlling the second pressure relief valve 17 to be in an open state when the air pressure data is greater than a second preset pressure threshold;

[0044] An overpressure protection unit 23, a relay switch 24 and a third pressure relief valve 18; the third pressure relief valve 18 is arranged on a third pressure relief pipeline communicated with the micro high-pressure oxygen chamber 10;

[0045] The overpressure protection unit 23 is used for controlling the third pressure relief valve to be in an open state and controlling the relay switch 24 to disconnect the circuit between the compressor and the power supply when the air pressure data is greater than a third preset pressure threshold; wherein, the second preset pressure threshold is not less than the first preset pressure threshold; the third preset pressure threshold is not less than the second preset pressure threshold.

[0046] Combined Figure 1 and Figure 2 , in this embodiment, the micro high-pressure oxygen chamber 10 is communicated with a pressure regulating pipeline, and the pressure regulating pipeline can exhaust the micro high-pressure oxygen chamber 10, so that the pressure regulating valve 15 on the pressure regulating pipeline is connected with the main control unit 21; when the air pressure in the micro high-pressure oxygen chamber 10 fluctuates, the main control unit 21 can adjust the opening degree of the pressure regulating valve 15, so as to maintain the air pressure in the micro high-pressure oxygen chamber 10 within a set air pressure range. Because the pressure regulating valve 15 needs to be frequently adjusted in opening degree along with the air pressure fluctuation in the micro high-pressure oxygen chamber 10, and the air pressure in the micro high-pressure oxygen chamber 10 is greater than the atmospheric pressure, this also causes a relatively large noise when discharging gas through the pressure regulating pipeline. Therefore, a silencing valve can be arranged at the end of the pressure regulating pipeline for silencing.

[0047] Furthermore, considering that in actual applications, relying solely on controlling the opening of the pressure-regulating valve 15 may not be sufficient to quickly and effectively reduce the air pressure within the micro-hyperbaric oxygen chamber 10 due to certain unexpected circumstances, this embodiment further provides a first pressure relief conduit, and connects a first pressure relief valve 16 on this first pressure relief conduit to the main control unit 21. Unlike the aforementioned pressure-regulating valve 15, the first pressure relief valve 16 in this embodiment has only two states: open and closed. When the first pressure relief valve 16 is open, the first pressure relief conduit is open, allowing the micro-hyperbaric oxygen chamber 10 to exhaust and relieve pressure. When the first pressure relief valve 16 is closed, the first pressure relief conduit stops relieving pressure from the micro-hyperbaric oxygen chamber 10. Under normal circumstances, the first pressure relief valve 16 is closed. However, when the air pressure data within the micro-hyperbaric oxygen chamber 10 measured by the pressure sensor 20 exceeds a first preset pressure threshold, indicating that the air pressure within the micro-hyperbaric oxygen chamber 10 is too high, the main control unit 21 switches the first pressure relief valve 16 to the open state. It can be understood that the first preset air pressure threshold in this embodiment should be greater than the maximum boundary air pressure value of the above-mentioned set air pressure range.

[0048] In most cases, the main control unit 21 only needs to adjust the opening of the pressure regulating valve 15 to reduce the pressure in the micro-hyperbaric oxygen chamber 10 to a normal pressure range. Even when the opening of the pressure regulating valve 15 has been adjusted to the maximum opening, the pressure data in the micro-hyperbaric oxygen chamber 10 still remains in a high-pressure state. In this case, the main control unit 21 controls the first pressure relief valve 16 to be in an open state, which can also cause the pressure in the micro-hyperbaric oxygen chamber 10 to drop rapidly.

[0049] The present embodiment further considers that if the air pressure in the micro-hyperbaric oxygen chamber 10 is regulated by relying solely on the main control unit 21, once the main control unit 21 fails or fails to regulate the first pressure relief valve 16, or when the first pressure relief valve 16 is also in the open state, the air pressure in the micro-hyperbaric oxygen chamber 10 still cannot be reduced quickly, and a safety hazard may occur to the people in the chamber.

[0050] To this end, in this embodiment, the micro-hyperbaric oxygen chamber 10 is further connected to a second pressure relief pipe, and a second pressure relief valve 17 is provided on the second pressure relief pipe; similar to the first pressure relief valve 17 on the first pressure relief pipe, the second pressure relief pipe can also relieve pressure on the micro-hyperbaric oxygen chamber 10, and the second pressure relief valve 17 is connected to the overpressure detection unit 22; when the air pressure data in the micro-hyperbaric oxygen chamber 10 measured by the air pressure sensor 20 is greater than the second preset air pressure threshold, the overpressure detection unit 22 controls the second pressure relief valve 17 to open, so that the second pressure relief pipe starts to relieve pressure on the micro-hyperbaric oxygen chamber 10.

[0051] It can be seen that the overpressure detection unit 22 in this embodiment controls the second pressure relief valve 17, which can actually control the second pressure relief pipeline to relieve pressure and exhaust gas from the micro-high pressure oxygen chamber 10 on the basis that the main control unit 21 fails to control the air pressure in the micro-high pressure oxygen chamber 10, thereby improving the safety of the micro-high pressure oxygen chamber 10 to a certain extent.

[0052] As described above, if the main control unit 21 fails to adjust and control the pressure regulating valve 15 and the first pressure relief valve 16 to bring the air pressure in the micro-high pressure oxygen chamber 10 within the normal range, it is very likely that the main control unit 21 has a fault or crashes. Therefore, in an optional implementation manner in this embodiment, when the air pressure sensor 20 measures that the air pressure data in the micro-high pressure oxygen chamber 10 is greater than the second preset pressure threshold, in addition to controlling the second pressure relief valve 17 to switch from the closed state to the open state, the overpressure detection unit 22 can further reset and restart the main control unit 21. If the restarted main control unit 21 can restore its normal control function, it can obviously also control the first pressure relief valve 16 to open. At this time, the first pressure relief valve 16 and the second pressure relief valve 17 can be opened simultaneously, so that the first pressure relief pipeline and the second pressure relief pipeline can relieve pressure and exhaust gas from the micro-high pressure oxygen chamber 10 at the same time, and then quickly restore the air pressure in the micro-high pressure oxygen chamber 10 to normal.

[0053] In this embodiment, the main control unit 21 and the overpressure detection unit 22 can be two different MCU chips respectively, and the two MCU chips can be integrated on the same circuit board, which is convenient for the overpressure detection unit 22 to reset and restart the main control unit 21.

[0054] Based on the above discussion, in this embodiment, further considering that in practical applications, when the main control unit 21 and the overpressure detection unit 22 perform pressure relief control on the micro high-pressure oxygen chamber 10 when the air pressure in the micro high-pressure oxygen chamber 10 is too high, there may also be various accidental situations such as failures of the main control unit 21 and the overpressure detection unit 22, or too large air flow rate of the compressed air introduced by the compressor, resulting in the air pressure in the micro high-pressure oxygen chamber 10 not being able to drop all the time. For this reason, in this embodiment, the micro high-pressure oxygen chamber 10 is further connected with a third pressure relief pipeline, and a third pressure relief valve 18 is provided on the third pressure relief pipeline. The working mode of the third pressure relief valve 18 is the same as that of the above-mentioned first pressure relief valve 16 and the second pressure relief valve 17, and will not be repeated here; thus, when the air pressure data in the micro high-pressure oxygen chamber 10 has risen to be greater than the third preset pressure threshold, the overpressure detection unit 22 can automatically start to control the third pressure relief valve 18 to be in the open state at this time, so that the third pressure relief pipeline starts to relieve pressure on the micro high-pressure oxygen chamber 10, and at the same time, the overpressure detection unit 22 further controls the relay switch 24 to be disconnected; the relay switch 24 is an electric circuit switch connecting the power supply voltage and the air compressor 13. Therefore, when the relay switch 24 is in the disconnected state, the air compressor 13 also stops working, no longer compresses air and stops introducing compressed air into the micro high-pressure oxygen chamber 10, so as to be able to quickly reduce the pressure of the micro high-pressure oxygen chamber 10.

[0055] It should be noted that when this embodiment adjusts the state of too high air pressure in the micro high-pressure oxygen chamber 10, during the process of the main control unit 21 and the overpressure detection unit 22 adjusting the air pressure in the micro high-pressure oxygen chamber 10, the air pressure in the micro high-pressure oxygen chamber 10 is quickly reduced to the normal air pressure range without interrupting the normal operation of the micro high-pressure oxygen chamber 10, that is to say, on the basis of ensuring the safety of the personnel in the micro high-pressure oxygen chamber 10, the normal working state of the micro high-pressure oxygen chamber 10 is maintained; when the overpressure protection unit 23 is started, it means that the air pressure in the micro high-pressure oxygen chamber 10 is already too high and its normal operation cannot be maintained. At this time, the overpressure protection unit 23 controls the air compressor 13 to stop working, that is, cuts off the possibility of the air pressure in the chamber rising from the source of the air pressure rise in the micro high-pressure oxygen chamber 10, and at the same time controls the third pressure relief valve to be in the open state to relieve pressure on the micro high-pressure oxygen chamber 10, so as to quickly eliminate the safety hazards of the staff in the chamber.

[0056] Based on the above discussion, when the main control unit 21, the overvoltage detection unit 22, and the overvoltage protection unit 23 respectively adjust and control the air pressure in the micro high-pressure oxygen chamber 10, they all need to obtain the air pressure data collected by the air pressure sensor 20. Therefore, in an optional implementation manner of this embodiment, the air pressure sensor 20 may include a first air pressure sensor 201, a second air pressure sensor 202, and a third air pressure sensor 203. Among them, the first air pressure sensor 201 is connected to the main control unit 21, the second air pressure sensor 202 is connected to the overvoltage detection unit 22, and the third air pressure sensor 203 is connected to the overvoltage protection unit 23.

[0057] In this embodiment, the three air pressure sensors 20 respectively detect the air pressure data in the micro high-pressure oxygen chamber 10 in three parallel paths, thereby avoiding the problem that the air pressure in the micro high-pressure oxygen chamber 10 is too high due to the failure of one of the air pressure sensors 20, which is beneficial to timely reduce the air pressure in the micro high-pressure oxygen chamber 10 and ensure the safety of the personnel in the micro high-pressure oxygen chamber 10.

[0058] In addition, in another optional implementation manner of this embodiment, the main control unit 21 may further be connected with an alarm.

[0059] The main control unit 21 is used to periodically send detection signals to the air pressure sensor 20. If the measured value feedback by the air pressure sensor 20 is not received within the set time, or the received measured value is deviated, it is determined to control the alarm to alarm.

[0060] In this embodiment, by periodically sending detection signals to the air pressure sensor 20, the failure of the air pressure sensor 20 can be timely detected, thereby avoiding the increase in the air pressure in the micro high-pressure oxygen chamber 10 caused by the failure of the air pressure sensor 20 and further causing potential safety hazards.

[0061] In addition, the main control unit 21 in this embodiment is also connected with a remote control device; the main control unit 21 can communicate with the remote control device in real time. On the one hand, it can upload the air pressure data collected by the air pressure sensor 20 to the remote control device in real time. On the other hand, the remote control device can also send control signals to the main control unit 21 to manually adjust the air pressure in the micro high-pressure oxygen chamber 10.

[0062] Based on any of the above embodiments, in another optional embodiment of the present application, the overvoltage protection unit 23 may further include:

[0063] An overvoltage comparison circuit with an input end connected to the output end of the air pressure sensor 20, a first output end of the overvoltage comparison circuit is connected to the control input end of the relay switch 24; a second output end of the overvoltage comparison circuit is connected to the control input end of the third pressure relief valve 18;

[0064] The overvoltage comparison circuit includes a zero-crossing comparator; the inverting input terminal of the zero-crossing comparator is connected to a set DC voltage, and the non-inverting input terminal is connected to the output terminal of the pressure sensor 20.

[0065] In this embodiment, it is considered that in the above-mentioned embodiment, both the main control unit 21 and the overvoltage detection unit 22 are implemented by using an MCU chip. Once the program goes wrong, it is very easy to cause the air pressure in the micro-high-pressure oxygen chamber 10 to get out of control. Therefore, the overvoltage protection unit 23 in this embodiment adopts a hardware circuit structure, which improves the safety of the micro-high-pressure oxygen chamber 10 to a certain extent. Specifically, the overvoltage protection unit 23 mainly includes an overvoltage comparator. Since the air pressure measured by the pressure sensor 20 is proportional to the electrical signal output by it, that is to say, the electrical signal output by the pressure sensor 20 increases as the air pressure measured by it increases. Thus, the inverting input terminal of the zero-crossing comparator can be connected to a set DC voltage; when the air pressure data in the micro-high-pressure oxygen chamber 10 is equal to the third preset voltage threshold, the voltage value output by the pressure sensor 20 is equal to this set DC voltage. Therefore, when the electrical signal output by the pressure sensor 20 received by the non-inverting input terminal of the zero-crossing comparator is greater than this set DC voltage, the zero-crossing comparator outputs a high level, and when the electrical signal received by the non-inverting input terminal of the zero-crossing comparator is less than this set DC voltage, the zero-crossing comparator outputs a low level. For the relay switch 24 and the third pressure relief valve 18, when the zero-crossing comparator outputs a high level, the relay switch 24 is disconnected and the third pressure relief valve 18 is switched to the open state, and when the zero-crossing comparator outputs a low level, the relay switch 24 remains closed and the third pressure relief valve 18 is switched to the closed state. Thus, the overvoltage protection unit 23 realizes the state control of the relay switch 24 and the third pressure relief valve 18.

[0066] Of course, in practical applications, the overvoltage protection unit 23 is not limited to the above-mentioned circuit structure of one implementation method. As Figure 3 shown, in another alternative embodiment of the present application, the overvoltage protection unit 23 may include:

[0067] A dual voltage comparator U1, a first overvoltage circuit 31 and a second overvoltage circuit 32 respectively connected to two input terminals of the dual voltage comparator U1; the input terminals of the first overvoltage circuit 31 and the second overvoltage circuit 32 are both connected to the output terminal of the pressure sensor 20; and the circuit structures of the first overvoltage circuit 31 and the second overvoltage circuit 32 are the same;

[0068] The first overvoltage circuit 31 includes a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, and a second capacitor C2; among them, the first resistor R1 is an adjustable resistor; the first end of the first resistor R1, the first end of the first capacitor C1, the first end of the second resistor R2, and the first end of the third resistor R3 are all connected to the first DC voltage terminal DC1; the second end of the first resistor R1, the second end of the first capacitor C1, and the second end of the second capacitor C2 are grounded together; the sliding end of the first resistor R1 is connected to the first inverting input terminal 1IN- of the dual voltage comparator U1; the second end of the second resistor R2 and the first end of the second capacitor C2 are jointly used as the input terminal of the first overvoltage circuit 31 and are connected to the output terminal of the air pressure sensor 20, and are also connected to the first non-inverting input terminal 1IN+ of the dual voltage comparator U1; the second end of the third resistor R3 and the first output terminal 1OUT of the dual voltage comparator U1 are jointly connected to the control input terminal J1 of the relay switch 24; the second output terminal 2OUT of the dual voltage comparator U1 is connected to the control input terminal J2 of the third pressure relief valve 18.

[0069] As Figure 3 shown, in the first overvoltage circuit 31, the voltage applied to the first inverting input terminal 1IN- of the dual voltage comparator U1 can be changed by sliding the position of the sliding end of the first resistor R1. In practical applications, the position of the sliding end on the first resistor R1 can be determined based on the magnitude of the voltage output by the air pressure sensor 20 (specifically, the third air pressure sensor 203 in this embodiment) when the air pressure is equal to the third preset pressure threshold, so that the voltage value input from the sliding end of the first resistor R1 to the first inverting input terminal 1IN- of the dual voltage comparator U1 is equal to the voltage value output by the air pressure sensor 20 when the magnitude of the air pressure data is equal to the third preset pressure threshold.

[0070] On this basis, in this embodiment, the output terminal of the air pressure sensor 20 is further connected between the second resistor R2 and the second capacitor C2 and is also connected to the first non-inverting input terminal 1IN+ of the dual voltage comparator U1. Therefore, when the voltage at the first inverting input terminal 1IN- of the dual voltage comparator U1 is lower than the voltage at the first non-inverting input terminal 1IN+ of the dual voltage comparator U1, the first output terminal 1OUT of the dual voltage comparator U1 outputs a high level; when the voltage at the first inverting input terminal 1IN- of the dual voltage comparator U1 is higher than the first non-inverting input terminal 1IN+, the first output terminal 1OUT of the dual voltage comparator U1 outputs a low level.

[0071] On this basis, referring to Figure 3, the circuit structures and circuit principles of the second overvoltage circuit 32 and the first overvoltage circuit 31 in this embodiment can be exactly the same; that is to say, when the voltage at the second inverting input terminal 2IN- of the dual voltage comparator U1 is lower than the voltage at the second non-inverting input terminal 2IN+ of the dual voltage comparator U1, the second output terminal 2OUT of the dual voltage comparator U1 outputs a high level; when the voltage at the second inverting input terminal 2IN- of the dual voltage comparator U1 is higher than the second non-inverting input terminal 2IN+, the second output terminal 2OUT of the dual voltage comparator U1 outputs a low level. Thus, when the air pressure data measured by the third air pressure sensor 203 is greater than the third preset pressure threshold, both the first output terminal 1OUT and the second output terminal 2OUT of the dual voltage comparator U1 can output high levels; when the air pressure data measured by the third air pressure sensor 203 is less than the third preset pressure threshold, both the first output terminal 1OUT and the second output terminal 2OUT of the dual voltage comparator U1 can output low levels.

[0072] The first output terminal 1OUT and the second output terminal 2OUT of the dual voltage comparator U1 are respectively connected to the control input terminal J1 of the relay switch 24 and the control input terminal J2 of the third pressure relief valve 18. Thus, when the first output terminal 1OUT and the second output terminal 2OUT of the dual voltage comparator U1 are at a high level, the connection between the power supply and the air compressor 13 can be controlled to be disconnected by the relay switch 24, so that the air compressor 13 stops working, and the third pressure relief valve 18 is switched to the open state, so that the third pressure relief pipeline relieves pressure on the micro-high pressure oxygen chamber 10; when the first output terminal 1OUT and the second output terminal 2OUT of the dual voltage comparator U1 are at a low level, the relay switch 24 can be controlled to be closed, and the third pressure relief valve 18 is switched to the closed state.

[0073] Optionally, the dual voltage comparator U1 in this embodiment can be an LM393 comparator.

[0074] In another optional implementation manner of this embodiment, a first switch circuit 33 is further provided between the first output terminal 1OUT of the dual voltage comparator U1 and the control input terminal J1 of the relay switch 24; a second switch circuit 34 is further provided between the second output terminal 2OUT of the dual voltage comparator U1 and the control input terminal J2 of the third pressure relief valve 18; the circuit structures of the first switch circuit 33 and the second switch circuit 34 are the same;

[0075] The first switch circuit 33 includes a fourth resistor R4, a fifth resistor R5, an NMOS transistor Q1, and a diode D1. Among them, the first end of the fourth resistor R4 is connected to the first output terminal 1OUT of the dual voltage comparator U1, and the second end of the fourth resistor R4 is connected to the first end of the fifth resistor R5 and the gate of the NMOS transistor Q1; the second end of the fifth resistor R5 and the source of the NMOS transistor Q1 are commonly grounded; the drain of the NMOS transistor Q1 is connected to the anode of the diode D1, and the cathode of the diode D1 is connected to the second DC voltage terminal; the drain of the NMOS transistor Q1 serves as the output terminal of the first switch circuit 33 and is connected to the control input terminal J1 of the relay switch 24.

[0076] When the first output terminal 1OUT of the dual voltage comparator U1 outputs a high level, the NMOS transistor Q1 is turned on, that is, the source voltage of the NMOS transistor Q1 is equal to the ground voltage, and the source of the NMOS transistor Q1 is disconnected from the second DC voltage terminal DC2 through the diode D1. The source of the NMOS transistor Q1 serves as the output terminal of the first switch circuit 33 to apply a low voltage to the second pin of the control input terminal J1 of the relay switch 24. Since the first pin of the control input terminal J1 of the relay switch 24 is connected to the second DC voltage terminal DC, a voltage difference is formed between the first pin and the second pin of the control input terminal J1 of the relay switch 24, which can cause the contacts of the relay switch 24 to disconnect, and further cause the air compressor 13 to lose power and stop working.

[0077] When the first output terminal 1OUT of the dual voltage comparator U1 outputs a low level, the NMOS transistor Q1 is turned off, making the source voltage of the NMOS transistor Q1 equal to the second DC voltage terminal DC2, that is, applying a high voltage (equal to the voltage value of the second DC voltage terminal DC2) to the second pin of the control input terminal J1 of the relay switch 24, making the voltage values of the first pin and the second pin of the control input terminal J1 of the relay switch 24 equal, which can cause the contacts of the relay switch 24 to close, and further cause the air compressor 13 to maintain a normal working state.

[0078] On this basis, the circuit structure and circuit principle of the second switch circuit 34 can be exactly the same as those of the first switch circuit 33. The difference is that the output terminal of the second switch circuit 34 is connected to the control input terminal J2 of the third pressure relief valve 18, and the method of controlling the opening and closing states of the third pressure relief valve 18 is the same as the method of controlling the disconnection and closing of the relay switch 24 by the first switch circuit 33 above, and this will not be repeated in this embodiment.

[0079] In this embodiment, the overvoltage protection unit 23 is configured with two circuit structures to control the states of the relay switch 24 and the third pressure relief valve 18 respectively. Even if one of the circuit structures fails, it can still ensure that the relay switch 24 is disconnected or the third pressure relief valve 18 is switched to the open state, thus avoiding the problem that the pressure reduction control of the micro-high-pressure oxygen chamber 10 completely fails and further improving the safety of the micro-high-pressure oxygen chamber 10.

[0080] In summary, in this application, three different unit structures, namely the main control unit, the overpressure detection unit, and the overpressure protection unit, are used to control the pressure reduction of the micro-high-pressure oxygen chamber when the pressure in the micro-high-pressure oxygen chamber is too high. Among them, the main control unit controls and adjusts the opening degree of the pressure regulating valve according to the pressure data measured by the pressure sensor to maintain the pressure balance in the micro-high-pressure oxygen chamber. Once the main control unit fails to quickly control the pressure reduction of the micro-high-pressure oxygen chamber through the regulating valve, it further controls the first pressure relief valve to switch to the open state to relieve the pressure of the micro-high-pressure oxygen chamber through the first pressure relief pipeline. On this basis, when the main control unit fails to control the pressure reduction of the micro-high-pressure oxygen chamber due to accidental faults or other reasons, the overpressure detection unit can be further used to switch the second pressure relief valve to the open state, so as to relieve the pressure and exhaust the air of the micro-high-pressure oxygen chamber through the second pressure relief pipeline. In order to further improve the safety of the micro-high-pressure oxygen chamber, when the pressure in the micro-high-pressure oxygen chamber cannot be quickly reduced through both the main control unit and the overpressure detection unit, the overpressure protection unit can cut off the power supply of the air compressor and switch the third pressure relief valve to the open state, that is, while relieving the pressure of the micro-high-pressure oxygen chamber, cut off the boost air source in the micro-high-pressure oxygen chamber, so as to quickly and effectively realize the pressure reduction in the micro-high-pressure oxygen chamber, ensure the safety of the micro-high-pressure oxygen chamber, and facilitate the wide application of the micro-high-pressure oxygen chamber.

[0081] An embodiment of a micro-high-pressure oxygen chamber system is also provided in this application. The micro-high-pressure oxygen chamber system may include a micro-high-pressure oxygen chamber, the control system of the micro-high-pressure oxygen chamber as described in any one of the above, and a pressure regulating pipeline, a first pressure relief pipeline, a second pressure relief pipeline, and a third pressure relief pipeline that are connected to the inside of the micro-high-pressure oxygen chamber. Among them, the pressure regulating valve, the first pressure relief valve, the second pressure relief valve, and the third pressure relief valve in the control system of the micro-high-pressure oxygen chamber are respectively arranged on the pressure regulating pipeline, the first pressure relief pipeline, the second pressure relief pipeline, and the third pressure relief pipeline.

[0082] The control system in the micro-high-pressure oxygen chamber system in this embodiment may include:

[0083] A main control unit, a pressure sensor for collecting the air pressure data in the micro-high-pressure oxygen chamber, a pressure regulating valve, and a first pressure relief valve; the pressure regulating valve is arranged on the pressure regulating pipeline of the micro-high-pressure oxygen chamber, and the first pressure relief valve is arranged on the first pressure relief pipeline connected to the micro-high-pressure oxygen chamber;

[0084] The main control unit is used to adjust the opening degree of the pressure regulating valve when the air pressure data is not greater than the first preset pressure threshold, so as to maintain the air pressure in the micro high-pressure oxygen chamber within the set pressure range. When the magnitude of the air pressure data is greater than the first preset pressure threshold, the first pressure relief valve is controlled to be in an open state;

[0085] An overpressure detection unit and a second pressure relief valve; the second pressure relief valve is arranged on a second pressure relief pipeline communicated with the inside of the micro high-pressure oxygen chamber;

[0086] The overpressure detection unit is used to control the second pressure relief valve to be in an open state when the air pressure data is greater than the second preset pressure threshold;

[0087] An overpressure protection unit, a relay switch and a third pressure relief valve; the third pressure relief valve is arranged on a third pressure relief pipeline communicated with the micro high-pressure oxygen chamber;

[0088] The overpressure protection unit is used to control the third pressure relief valve to be in an open state when the air pressure data is greater than the third preset pressure threshold, and control the relay switch to disconnect the circuit between the compressor and the power supply; wherein, the second preset pressure threshold is not less than the first preset pressure threshold; the third preset pressure threshold is not less than the second preset pressure threshold.

[0089] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes the inherent elements thereof. Without more limitations, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element. In addition, the parts of the above technical solutions provided in the embodiments of the present application that are consistent with the corresponding technical solutions in the prior art in terms of implementation principles are not described in detail to avoid excessive elaboration.

[0090] Specific examples are used in this article to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A control system for a micro hyperbaric oxygen chamber, characterized in that, Including: A main control unit, a pressure sensor for collecting the air pressure data inside the micro high-pressure oxygen chamber, a pressure regulating valve, and a first pressure relief valve; the pressure regulating valve is arranged on the pressure regulating pipeline of the micro high-pressure oxygen chamber, and the first pressure relief valve is arranged on the first pressure relief pipeline communicated with the micro high-pressure oxygen chamber; The main control unit is used to adjust the opening degree of the pressure regulating valve when the air pressure data is not greater than the first preset pressure threshold value to maintain the air pressure inside the micro high-pressure oxygen chamber within the set pressure range, and control the first pressure relief valve to be in an open state when the air pressure data is greater than the first preset pressure threshold value; An overpressure detection unit and a second pressure relief valve; the second pressure relief valve is arranged on the second pressure relief pipeline communicated with the micro high-pressure oxygen chamber; The overpressure detection unit is used to control the second pressure relief valve to be in an open state when the air pressure data is greater than the second preset pressure threshold value; An overpressure protection unit, a relay switch, and a third pressure relief valve; the third pressure relief valve is arranged on the third pressure relief pipeline communicated with the micro high-pressure oxygen chamber; The overpressure protection unit is used to control the third pressure relief valve to be in an open state when the air pressure data is greater than the third preset pressure threshold value, and control the relay switch to disconnect the circuit between the compressor and the power supply; wherein, the second preset pressure threshold value is not less than the first preset pressure threshold value; the third preset pressure threshold value is not less than the second preset pressure threshold value.

2. The control system of the micro hyperbaric oxygen chamber according to claim 1, characterized in that, The overpressure detection unit is further used to control the main control unit to reset and restart when the pressure data measured by the pressure sensor is greater than the second preset pressure threshold value.

3. The control system of the micro-hyperbaric oxygen chamber according to claim 2, characterized in that, The overpressure detection unit and the main control unit are two MCU chips integrally arranged on the same circuit board.

4. The control system of the micro-hyperbaric oxygen chamber according to claim 1, wherein, It further includes an alarm connected to the main control unit; The main control unit is used to periodically send a detection signal to the pressure sensor. If the measured value feedback by the pressure sensor is not received within the set time, or the received measured value has a deviation, it is determined to control the alarm to give an alarm.

5. The control system of the micro-hyperbaric oxygen chamber according to claim 4, characterized in that, The main control unit is further connected with a remote control device; The main control unit is used to upload the received measured value to the remote control device.

6. The control system of the micro-hyperbaric oxygen chamber according to claim 1, characterized in that, The pressure sensor includes a first pressure sensor connected to the main control unit, a second pressure sensor connected to the overpressure detection unit, and a third pressure sensor connected to the overpressure protection unit.

7. The control system of the micro hyperbaric oxygen chamber according to claim 1, characterized in that, The overpressure protection unit includes: An overpressure comparison circuit with its input end connected to the output end of the pressure sensor. The first output end of the overpressure comparison circuit is connected to the control input end of the relay switch; the second output end of the overpressure comparison circuit is connected to the control input end of the third pressure relief valve; The overpressure comparison circuit includes a zero-crossing comparator; the inverting input end of the zero-crossing comparator is connected to a set DC voltage, and the non-inverting input end is connected to the output end of the pressure sensor.

8. The control system of the micro-hyperbaric oxygen chamber according to claim 1, characterized in that, The overvoltage protection unit includes a dual voltage comparator, a first overvoltage circuit and a second overvoltage circuit respectively connected to two input terminals of the dual voltage comparator; the input terminals of the first overvoltage circuit and the second overvoltage circuit are both connected to the output terminal of the air pressure sensor; and the circuit structures of the first overvoltage circuit and the second overvoltage circuit are the same; The first overvoltage circuit includes a first resistor, a second resistor, a third resistor, a first capacitor and a second capacitor; wherein, the first resistor is an adjustable resistor; the first end of the first resistor, the first end of the first capacitor, the first end of the second resistor and the first end of the third resistor are all connected to a first DC voltage terminal; the second end of the first resistor, the second end of the first capacitor and the second end of the second capacitor are commonly grounded; the sliding end of the first resistor is connected to the first inverting input terminal of the dual voltage comparator; the second end of the second resistor and the first end of the second capacitor are commonly used as the input terminal of the first overvoltage circuit and connected to the output terminal of the air pressure sensor, and are connected to the first non-inverting input terminal of the dual voltage comparator; the second end of the third resistor and the first output terminal of the dual voltage comparator are commonly connected to the control input terminal of the relay switch; the second output terminal of the dual voltage comparator is connected to the control input terminal of the third pressure relief valve.

9. The control system of the micro-hyperbaric oxygen chamber according to claim 8, wherein, A first switch circuit is further provided between the first output terminal of the dual voltage comparator and the control input terminal of the relay switch; a second switch circuit is further provided between the second output terminal of the dual voltage comparator and the control input terminal of the third pressure relief valve; the circuit structures of the first switch circuit and the second switch circuit are the same; The first switch circuit includes a fourth resistor, a fifth resistor, an NMOS transistor and a diode, wherein the first end of the fourth resistor is connected to the first output terminal of the dual voltage comparator, the second end of the fourth resistor is connected to the first end of the fifth resistor and the gate of the NMOS transistor; the second end of the fifth resistor and the source of the NMOS transistor are commonly grounded; the drain of the NMOS transistor is connected to the anode of the diode, and the cathode of the diode is connected to a second DC voltage terminal; the drain of the NMOS transistor is used as the output terminal of the first switch circuit and connected to the control input terminal of the relay switch.

10. A micro hyperbaric oxygen chamber system, characterized in that, It includes a micro hyperbaric oxygen chamber, the control system of the micro hyperbaric oxygen chamber according to any one of claims 1 to 9, and a pressure regulating pipeline, a first pressure relief pipeline, a second pressure relief pipeline and a third pressure relief pipeline connected to the inside of the micro hyperbaric oxygen chamber; wherein, the pressure regulating valve, the first pressure relief valve, the second pressure relief valve and the third pressure relief valve in the control system of the micro hyperbaric oxygen chamber are respectively arranged on the pressure regulating pipeline, the first pressure relief pipeline, the second pressure relief pipeline and the third pressure relief pipeline.

Images