Molecular sieve oxygen device with continuous oxygen supply flow regulation function

Abstract

The invention discloses a molecular sieve oxygen device with a continuous oxygen supply flow regulation function, in the device, a molecular sieve oxygen source and an emergency oxygen bottle oxygen source are respectively connected to an oxygen source switching mechanism of an oxygen regulation control box, and are connected to a selectable respirator through a flow regulation mechanism, so that the molecular sieve oxygen device provides a molecular sieve-mask; four continuous oxygen supply modes of molecular sieve-nasal oxygen tube, emergency oxygen bottle-mask and emergency oxygen bottle-nasal oxygen are adopted; the oxygen regulation control box comprises an oxygen regulation control panel and is used for executing switching of four continuous oxygen supply modes through an oxygen supply mode switch and a breathing selection switch on the oxygen regulation control panel and adjusting the oxygen flow in each continuous oxygen supply mode through a flow adjusting knob. According to the technical scheme provided by the invention, the problems that a continuous oxygen supply device of an existing structure is high in spraying face feeling, free of spraying face feeling or large in inspiration resistance during oxygen use and the like possibly exist, and the problem that forced landing needs to be carried out due to the fact that the flow cannot be adjusted when oxygen is supplied by an emergency oxygen bottle, and the oxygen use time is short is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of oxygen systems of airborne environmental control systems, but is not limited to it, and in particular to a molecular sieve oxygen device with a continuous oxygen supply flow rate regulation function. Background Art

[0002] The molecular sieve oxygen device is a common airborne oxygen supply device. The molecular sieve oxygen device uses the principle of pressure swing adsorption to allow nitrogen to be adsorbed and oxygen to pass through (adsorb) under a certain pressure and to discharge (desorb) nitrogen under ambient pressure, thereby producing finished gas that meets the physiological requirements of the crew.

[0003] Molecular sieve oxygen devices often use lung-type oxygen supply and continuous oxygen supply. Lung-type oxygen supply controls the lung-type regulating mechanism through a pressure sensor and supplies oxygen through the pilot's actual breathing, while continuous oxygen supply is an uninterrupted supply of gas. In conventionally configured continuous oxygen supply devices, when the pilot is continuously supplied with oxygen, he receives finished gas from a gas tank or pure oxygen from an emergency oxygen cylinder, and is unable to adjust the flow and concentration of oxygen. Pilots often report problems such as a strong "spraying feeling" or no "spraying feeling" or large inhalation resistance when using oxygen. In particular, existing continuous oxygen supply devices are unable to cope with special oxygen use conditions. For example, when a higher concentration of oxygen is required for replenishment in the event of an injury, the oxygen concentration and flow cannot be adjusted. If emergency oxygen cylinders are used for oxygen supply, in an emergency, the oxygen cylinder capacity is limited and the flow cannot be adjusted, resulting in insufficient oxygen time and the need for forced landing. Summary of the invention

[0004] The purpose of the present invention is: in order to solve the above problems, the embodiments of the present invention provide a molecular sieve oxygen device with a continuous oxygen supply flow adjustment function, so as to solve the problems that the existing continuous oxygen supply device may have problems such as strong "spraying feeling" when using oxygen, no "spraying feeling" or large inhalation resistance, as well as the problem that when emergency oxygen cylinders are supplying oxygen, the oxygen use time is short and an emergency landing is required due to the inability to adjust the flow.

[0005] The technical solution of the present invention is as follows: the embodiment of the present invention provides a molecular sieve oxygen device with a continuous oxygen supply flow rate adjustment function, comprising: a molecular sieve oxygen source 1, an emergency oxygen cylinder oxygen source 2, an oxygen adjustment control box 3 and an optional respirator; the optional respirator comprises an oxygen supply mask 4 and a nasal oxygen tube 5;

[0006] The molecular sieve oxygen source 1 and the emergency oxygen cylinder oxygen source 2 are respectively connected to the oxygen source switching mechanism of the oxygen conditioning control box 3, and are connected to the optional respirator through the flow regulating mechanism, so that the molecular sieve oxygen device provides four continuous oxygen supply modes: molecular sieve-mask, molecular sieve-nasal oxygen tube, emergency oxygen cylinder-mask, and emergency oxygen cylinder-nasal oxygen;

[0007] The oxygen conditioning control box 3 includes an oxygen conditioning control panel, which is used to switch the four continuous oxygen supply modes through the oxygen supply mode switch and the breathing selection switch on the oxygen conditioning control panel, and adjust the oxygen flow in each continuous oxygen supply mode through the flow adjustment knob.

[0008] Optionally, in the molecular sieve oxygen device with continuous oxygen supply flow rate regulation function as described above, the oxygen regulation control box 3 comprises: a control module 6, an oxygen source switching valve 7, and a flow rate regulating valve 8;

[0009] The control module 6 is electrically connected to the oxygen source switching valve 7 and the flow regulating valve 8 respectively, the molecular sieve oxygen source 1 is connected to the oxygen source switching valve 7 via the first gas path, the emergency oxygen cylinder oxygen source 2 is connected to the oxygen source switching valve 7 via the second gas path, the oxygen source switching valve 7 is connected to the optional respirator via the third gas path, and the flow regulating valve 8 is provided in the third gas path;

[0010] The oxygen adjustment control box 3 is used to switch the oxygen source switching valve 7 through the control module 6, so that the oxygen source switching valve 7 selects the oxygen source of the molecular sieve oxygen source 1 or the emergency oxygen cylinder oxygen source 2 to enter the third gas path, and controls the flow regulating valve 8 through the control module 6, so that the oxygen flow rate can be continuously adjusted in each continuous oxygen supply mode.

[0011] Optionally, in the molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function as described above,

[0012] The oxygen supply mode switch and the breathing selection switch on the oxygen control panel in the oxygen control box 3 are electrical switches, which are connected to the control module 6 in the oxygen control box 3 through a circuit; when the pilot operates the oxygen supply mode switch or the breathing selection switch, the internal contacts of the switch can be connected, and the control module 6 is used to collect the gear position signal of the corresponding switch, so as to identify the current oxygen supply mode or respirator.

[0013] Optionally, in the molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function as described above, the function switching strategies of the four continuous oxygen supply modes are:

[0014] Scenario 1: When the pilot switches the oxygen supply mode switch on the oxygen conditioning control box 3 to "molecular sieve", the control module 6 identifies the "molecular sieve" and switches the oxygen source switching valve 7 to the first gas path;

[0015] Scenario 2: When the pilot switches the oxygen supply mode switch on the oxygen conditioning control box 3 to "emergency", the control module 6 identifies "emergency" and switches the oxygen source switching valve 7 to the second gas path;

[0016] Scenario 3, the pilot adjusts the flow control knob, and the control module 6 controls the adjustment opening of the flow control valve 8;

[0017] Scenario 4, based on Scenario 1 or Scenario 2, when the pilot uses the oxygen mask 4 to supply oxygen and turns the "mask / nasal oxygen" switch to "mask", the control module 6 recognizes the "mask" signal, that is, the continuous oxygen supply mode of the molecular sieve-mask or the emergency oxygen cylinder-mask is realized;

[0018] Scenario 5, based on Scenario 1 or Scenario 2, when the pilot uses the nasal oxygen tube 5 to supply oxygen and turns the "mask / nasal oxygen" switch to "nasal oxygen", the control module 6 recognizes the "nasal oxygen" signal, that is, the continuous oxygen supply mode of molecular sieve-nasal oxygen tube, emergency oxygen cylinder-nasal oxygen is realized.

[0019] Optionally, in the molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function as described above,

[0020] The oxygen flow rates under the four continuous oxygen supply modes are determined by taking the flow rate value of the C curve in the national military standard as the boundary value.

[0021] Optionally, in the molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function as described above,

[0022] The finished gas produced by the molecular sieve oxygen source 1 is mixed oxygen, the finished gas produced by the emergency oxygen cylinder oxygen source 2 is pure oxygen, the oxygen supply mask 4 is a closed mask, and the outlet of the nasal oxygen tube 5 is ambient air; the oxygen concentration range under the four continuous oxygen supply modes is required to meet the following conditions: the oxygen concentration inhaled by the pilot is not lower than the C curve concentration at the corresponding flight altitude.

[0023] Optionally, in the molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function as described above,

[0024] The oxygen flow rate of emergency oxygen cylinder oxygen source 2 is:

[0025] Pilot's inhaled air oxygen concentration = (pure oxygen volume + (lung ventilation volume - pure oxygen volume) × 0.2095) / lung ventilation volume;

[0026] The oxygen flow rate of molecular sieve oxygen source 1 is:

[0027] The oxygen concentration of the pilot's inhaled air = (oxygen enrichment × oxygen concentration of the molecular sieve oxygen source 1 at the corresponding altitude + (pulmonary ventilation volume - oxygen enrichment × oxygen concentration of the molecular sieve oxygen source 1 at the corresponding altitude) × 0.2095) / pulmonary ventilation volume.

[0028] Optionally, in the molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function as described above,

[0029] The oxygen control box 3 controls the flow regulating valve 8 through the control module 6 in the following manner:

[0030] After the pilot determines the continuous oxygen supply mode for continuous oxygen supply by adjusting the oxygen supply mode switch and the breathing selection switch on the oxygen adjustment control panel, the oxygen concentration range in the current continuous oxygen supply mode is obtained according to the relationship between the current continuous oxygen supply mode and the flow value of the C curve, so that the adjustable opening range of the flow control valve 8 is controlled to correspond to the oxygen concentration range of the current continuous oxygen supply mode, and the adjustment range of the flow adjustment knob on the oxygen adjustment control panel is the oxygen concentration range of the current continuous oxygen supply mode, so that the continuous oxygen supply flow of the third gas path is adjusted according to the pilot's flow adjustment knob on the oxygen adjustment control panel, and dynamic adjustment is performed through the opening feedback of the flow control valve 8, so that the opening of the flow control valve 8 is stabilized to the oxygen flow adjusted by the flow adjustment knob.

[0031] Optionally, in the molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function as described above,

[0032] In the optional respirator, the oxygen supply mask 4 and the nasal oxygen tube 5 are selective oxygen outputs. The oxygen supply mask 4 is connected to the oxygen supply mask interface on the oxygen conditioning control box 3, so that the oxygen on the third gas path is delivered to the pilot through the oxygen supply mask 4; if the nasal oxygen tube 5 is selected, the nasal oxygen tube 5 adapter is first connected to the oxygen supply mask 4 interface, and then the nasal oxygen tube 5 is connected to the adapter, so that the oxygen is delivered to the pilot through the nasal oxygen tube 5.

[0033] The beneficial effects of the present invention are as follows: the embodiment of the present invention provides a molecular sieve oxygen device with a continuous oxygen supply flow rate adjustment function, including: a molecular sieve oxygen source 1, an emergency oxygen cylinder oxygen source 2, an oxygen adjustment control box 3 and an optional respirator; and the optional respirator includes an oxygen supply mask 4 and a nasal oxygen tube 5; the molecular sieve oxygen source 1 and the emergency oxygen cylinder oxygen source 2 are respectively connected to the oxygen source switching mechanism of the oxygen adjustment control box 3, and are connected to the optional respirator through the flow adjustment mechanism, so that the molecular sieve oxygen device provides four continuous oxygen supply modes: molecular sieve-mask, molecular sieve-nasal oxygen tube, emergency oxygen cylinder-mask, and emergency oxygen cylinder-nasal oxygen; the oxygen adjustment control box 3 includes an oxygen adjustment control panel, which is used to switch the four continuous oxygen supply modes through the oxygen supply mode switch and the breathing selection switch on the oxygen adjustment control panel, and adjust the oxygen flow rate in each continuous oxygen supply mode through the flow adjustment knob. The molecular sieve oxygen device provided by the embodiment of the present invention has the following beneficial effects:

[0034] First, the present invention combines a molecular sieve oxygen source 1 with an emergency oxygen bottle oxygen source 1 to supply oxygen, and the terminal respirator can select an oxygen supply mask 4 and a nasal oxygen tube 5. The present invention performs gas path switching design and control strategy design for the entire molecular sieve oxygen device;

[0035] Second, the present invention realizes flow regulation during continuous oxygen supply (continuous oxygen supply mode of molecular sieve oxygen source 1 and continuous oxygen supply mode of emergency oxygen bottle oxygen source 2) by improving the design and control strategy of molecular sieve oxygen device, thus filling the gap of flow regulation function of current molecular sieve oxygen generator for airborne helicopters;

[0036] Third, for a variety of oxygen production and supply schemes, the present invention provides a design method for a flow adjustment knob for different continuous oxygen supply schemes. This integrated design can adjust a variety of oxygen supply schemes through a flow adjustment knob. For the onboard box panel, the space is limited. The oxygen adjustment control panel of the present invention is used to effectively simplify the panel design in the oxygen adjustment control box 3, simplify the pilot's operation, and at the same time be more aesthetically pleasing. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0038] Figure 1 A schematic diagram of the structure of a molecular sieve oxygen device with a continuous oxygen supply flow rate adjustment function provided in an embodiment of the present invention;

[0039] Figure 2 for Figure 1 A schematic diagram of an oxygen adjustment control panel in a molecular sieve oxygen device with a continuous oxygen supply flow adjustment function provided in the illustrated embodiment;

[0040] Figure 3 A schematic diagram of a curve for determining oxygen flow in a molecular sieve oxygen device with a continuous oxygen supply flow adjustment function provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0042] It has been explained in the above background technology that the molecular sieve oxygen device used has the oxygen supply forms of lung-type oxygen supply and continuous oxygen supply; in the conventional configuration of the continuous oxygen supply device, when the pilot is continuously supplied with oxygen, he receives the finished gas from the gas tank or the pure oxygen from the emergency oxygen cylinder, and is unable to adjust the flow and concentration of oxygen. Pilots often report problems such as strong "spraying feeling" or no "spraying feeling" or large inhalation resistance when using oxygen; in particular, the existing continuous oxygen supply device cannot cope with special oxygen use conditions, and the inability to adjust the flow leads to a short oxygen use time and an emergency landing.

[0043] In response to the above problems, an embodiment of the present invention provides a molecular sieve oxygen device with a continuous oxygen supply flow regulation function. Through the structural design and control strategy of the device, the flow regulation capability during continuous oxygen supply (continuous oxygen supply mode of molecular sieve oxygen source and oxygen supply from emergency oxygen cylinder source) is achieved.

[0044] The present invention provides the following specific embodiments which can be combined with each other. The same or similar concepts or processes may not be described in detail in some embodiments.

[0045] Figure 1 The schematic diagram of the structure of a molecular sieve oxygen device with continuous oxygen supply flow rate regulation function provided by an embodiment of the present invention. Figure 1 As shown, the composition structure of the molecular sieve oxygen device with continuous oxygen supply flow regulation function provided by an embodiment of the present invention may include: a molecular sieve oxygen source 1, an emergency oxygen cylinder oxygen source 2, an oxygen adjustment control box 3 and an optional respirator, wherein the optional respirator includes an oxygen supply mask 4 and a nasal oxygen tube 5.

[0046] like Figure 1 In the structure of the molecular sieve oxygen device shown, the molecular sieve oxygen source 1 and the emergency oxygen cylinder oxygen source 2 are respectively connected to the oxygen source switching mechanism of the oxygen conditioning control box 3, and are connected to the optional respirator through the flow regulating mechanism, so that the molecular sieve oxygen device provides four continuous oxygen supply modes: molecular sieve-mask, molecular sieve-nasal oxygen tube, emergency oxygen cylinder-mask, and emergency oxygen cylinder-nasal oxygen.

[0047] The oxygen control box 3 in the embodiment of the present invention includes an oxygen control panel, which is used to switch the four continuous oxygen supply modes through the oxygen supply mode switch and the breathing selection switch on the oxygen control panel, and adjust the oxygen flow rate in each continuous oxygen supply mode through the flow adjustment mechanism. Figure 2 As shown, Figure 1 The illustrated embodiment is a schematic diagram of an oxygen adjustment control panel in a molecular sieve oxygen device with a continuous oxygen supply flow adjustment function.

[0048] In one implementation of the embodiment of the present invention, Figure 1 As shown, the oxygen control box 3 includes: a control module 6, an oxygen source switching valve 7, and a flow regulating valve 8.

[0049] In this implementation, the control module 6 is electrically connected to the oxygen source switching valve 7 and the flow regulating valve 8 respectively, the molecular sieve oxygen source 1 is connected to the oxygen source switching valve 7 via the first gas path, the emergency oxygen cylinder oxygen source 2 is connected to the oxygen source switching valve 7 via the second gas path, the oxygen source switching valve 7 is connected to the optional respirator via the third gas path, and the flow regulating valve 8 is provided in the third gas path.

[0050] The oxygen adjustment control box 3 in this implementation is used to switch the oxygen source switching valve 7 through the control module 6, so that the oxygen source switching valve 7 selects the oxygen source of the molecular sieve oxygen source 1 or the emergency oxygen cylinder oxygen source 2 to enter the third gas path, and controls the flow regulating valve 8 through the control module 6, so that the oxygen flow rate can be continuously adjusted in each continuous oxygen supply mode.

[0051] In one implementation of the embodiment of the present invention, referring to Figure 1 and Figure 2 As shown, the oxygen supply mode switch ( Figure 2 ) and the breathing selector switch ( Figure 2 The "mask / nasal oxygen" switch in the oxygen control box 3 is an electrical switch, which is connected to the control module 6 in the oxygen control box 3 through a circuit. The pilot operates the corresponding switch to connect the internal contacts of the switch. The control module 6 is used to collect the gear position signal of the corresponding switch to identify the current oxygen supply mode and respirator.

[0052] The function switching strategies of the four continuous oxygen supply modes provided in the embodiment of the present invention are shown in Table 1 below:

[0053] Table 1 Function switching control strategy

[0054]

[0055]

[0056] In one implementation of the embodiment of the present invention, the oxygen flow rates in the four continuous oxygen supply modes are determined by using the flow rate value of the C curve in the national military standard as the boundary value. Figure 3 , which is a schematic diagram of a curve for determining the oxygen flow rate in a molecular sieve oxygen device with a continuous oxygen supply flow rate adjustment function provided in an embodiment of the present invention.

[0057] It should be noted that in the molecular sieve oxygen device provided in the embodiment of the present invention, the finished gas produced by the molecular sieve oxygen source 1 is mixed oxygen, the finished gas produced by the emergency oxygen cylinder oxygen source 2 is pure oxygen, the oxygen supply mask 4 in the molecular sieve oxygen device is a closed mask, and the outlet of the nasal oxygen tube 5 is ambient air. Therefore, in order to meet the requirement that the oxygen concentration inhaled by the pilot is not lower than the C curve concentration at the current flight altitude, the oxygen concentration ranges in the four different continuous oxygen supply modes are different.

[0058] Based on the above analysis, the methods for determining the oxygen flow rate in the four continuous oxygen supply modes in the embodiments of the present invention are specifically as follows:

[0059] The oxygen flow rate of emergency oxygen cylinder oxygen source 2 is:

[0060] Pilot's inhaled air oxygen concentration = (pure oxygen volume + (lung ventilation volume - pure oxygen volume) × 0.2095) / lung ventilation volume;

[0061] The oxygen flow rate of molecular sieve oxygen source 1 is:

[0062] The oxygen concentration of the pilot's inhaled air = (oxygen enrichment × oxygen concentration of the molecular sieve oxygen source 1 at the corresponding altitude + (pulmonary ventilation volume - oxygen enrichment × oxygen concentration of the molecular sieve oxygen source 1 at the corresponding altitude) × 0.2095) / pulmonary ventilation volume.

[0063] In one implementation of the embodiment of the present invention, the oxygen control box 3 controls the flow control valve 8 through the control module 6 in the following manner:

[0064] After the pilot determines the continuous oxygen supply mode for continuous oxygen supply by the oxygen supply mode switch and the breathing selection switch on the oxygen control panel, the oxygen concentration range in the current continuous oxygen supply mode is obtained according to the relationship between the current continuous oxygen supply mode and the flow value of the C curve, so as to control the adjustable opening range of the flow control valve 8 to correspond to the oxygen concentration range of the current continuous oxygen supply mode, and the adjustment range of the flow control knob on the oxygen control panel is the oxygen concentration range of the current continuous oxygen supply mode, so as to adjust the continuous oxygen supply flow of the third gas path according to the flow control knob on the oxygen control panel by the pilot, and perform dynamic adjustment through the opening feedback of the flow control valve 8, so that the opening of the flow control valve 8 is stabilized to the oxygen flow adjusted by the flow control knob. Specifically, the flow control valve 8 can be controlled according to the flow control control strategy shown in Table 2 to achieve flow regulation during continuous oxygen supply.

[0065] Table 2 Flow regulation control strategy

[0066]

[0067] It should be noted that, in view of the fact that the oxygen source of the molecular sieve oxygen device provided in the embodiment of the present invention includes a molecular sieve oxygen source 1 and an emergency oxygen bottle oxygen source 2, and the respirator can select an oxygen supply mask 4 and a nasal oxygen tube 5, the flow adjustment knob should cover the four continuous oxygen supply schemes of molecular sieve-mask, molecular sieve-nasal oxygen tube, emergency oxygen bottle-mask, and emergency oxygen bottle-nasal oxygen. Each continuous oxygen supply scheme has a different corresponding adjustment range due to its characteristics. Based on this, a design method for a flow adjustment knob for different continuous oxygen supply schemes is also proposed in the embodiment of the present invention.

[0068] 1. The oxygen supply concentration of the four oxygen supply schemes is converted to the flow value of the C curve in GJB114-1986 "Physiological Requirements for Acute Hypoxia Protection" as the boundary value;

[0069] 2. Determine the flow control valve opening boundary value based on the flow boundary value, and determine the flow control valve opening of the four oxygen supply schemes;

[0070] 3. For any continuous oxygen supply scheme, the control module 6 performs range control on the opening of the flow control valve 8 according to the flow control strategy and adjusts it within the range.

[0071] In a specific implementation of the embodiment of the present invention, the connection form between the oxygen supply mask 4 and the nasal oxygen tube 5 in the respirator can be selected as follows: the oxygen supply mask 4 and the nasal oxygen tube 5 are selective oxygen outputs, and the oxygen supply mask 4 is connected to the oxygen supply mask interface on the oxygen conditioning control box 3, so that the oxygen on the third gas path is delivered to the pilot through the oxygen supply mask 4; if the nasal oxygen tube 5 is selected, the nasal oxygen tube 5 adapter is first connected to the oxygen supply mask 4 interface, and then the nasal oxygen tube 5 is connected to the adapter, so that the oxygen is delivered to the pilot through the nasal oxygen tube 5.

[0072] The molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function provided by the embodiment of the present invention comprises: a molecular sieve oxygen source 1, an emergency oxygen cylinder oxygen source 2, an oxygen adjustment control box 3 and an optional respirator; and the optional respirator comprises an oxygen supply mask 4 and a nasal oxygen tube 5; the molecular sieve oxygen source 1 and the emergency oxygen cylinder oxygen source 2 are respectively connected to the oxygen source switching mechanism of the oxygen adjustment control box 3, and are connected to the optional respirator through the flow adjustment mechanism, so that the molecular sieve oxygen device provides four continuous oxygen supply modes: molecular sieve-mask, molecular sieve-nasal oxygen tube, emergency oxygen cylinder-mask, and emergency oxygen cylinder-nasal oxygen; the oxygen adjustment control box 3 comprises an oxygen adjustment control panel, which is used to switch the four continuous oxygen supply modes through the oxygen supply mode switch and the breathing selection switch on the oxygen adjustment control panel, and adjust the oxygen flow rate in each continuous oxygen supply mode through the flow adjustment knob. The molecular sieve oxygen device provided by the embodiment of the present invention has the following beneficial effects:

[0073] First, the present invention combines a molecular sieve oxygen source 1 with an emergency oxygen bottle oxygen source 1 to supply oxygen, and the terminal respirator can select an oxygen supply mask 4 and a nasal oxygen tube 5. The present invention performs gas path switching design and control strategy design for the entire molecular sieve oxygen device;

[0074] Second, the present invention realizes flow regulation during continuous oxygen supply (continuous oxygen supply mode of molecular sieve oxygen source 1 and continuous oxygen supply mode of emergency oxygen bottle oxygen source 2) by improving the design and control strategy of molecular sieve oxygen device, thus filling the gap of flow regulation function of current molecular sieve oxygen generator for airborne helicopters;

[0075] Third, for a variety of oxygen production and supply schemes, the present invention provides a design method for a flow adjustment knob for different continuous oxygen supply schemes. This integrated design can adjust a variety of oxygen supply schemes through a flow adjustment knob. For the onboard box panel, the space is limited. The oxygen adjustment control panel of the present invention is used to effectively simplify the panel design in the oxygen adjustment control box 3, simplify the pilot's operation, and at the same time be more aesthetically pleasing.

[0076] The following is an application example to illustrate the use of the molecular sieve oxygen device with continuous oxygen supply flow regulation function provided by the embodiment of the present invention.

[0077] Reference Figure 1 and Figure 2 As shown in FIG. 1 , when oxygen is needed, the pilot switches “start / stop” on the oxygen conditioning control box 3 panel to start the molecular sieve oxygen device, and switches the “mask / nasal oxygen” switch on the control box panel to the corresponding position according to the respirator worn. Under normal circumstances, the molecular sieve oxygen source 1 uses the “molecular sieve” mode to supply oxygen, and the control module 6 switches the oxygen source switching valve 7 to the first gas path, as shown in FIG. Figure 1 As shown, the finished gas produced by the molecular sieve oxygen source 1 is transported to the oxygen supply mask 4 or the nasal oxygen tube 5 through the first gas path and the third gas path.

[0078] When the molecular sieve oxygen source 1 fails, the pilot turns the knob to "emergency", and the control module 6 switches the oxygen source switching valve 7 to the second gas path, such as Figure 1 As shown, the emergency oxygen cylinder oxygen source 2 delivers pure oxygen to the oxygen supply mask 4 or the nasal oxygen tube 5 through the second gas path and the third gas path.

[0079] The flow regulating knob is in the middle position by default. When the control module 6 identifies a certain oxygen supply scheme according to "molecular sieve / emergency" and "mask / nasal oxygen", the flow regulating valve will be adjusted to the default opening.

[0080] When the pilot operates the flow adjustment knob, the control module 6 performs adjustment according to the flow adjustment control strategy in Table 2.

[0081] Although the embodiments disclosed in the present invention are as above, the contents are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. A molecular sieve oxygen device with continuous oxygen supply flow regulation function, characterized in that: include: A molecular sieve oxygen source (1), an emergency oxygen cylinder oxygen source (2), an oxygen conditioning control box (3) and an optional respirator; the optional respirator includes an oxygen supply mask (4) and a nasal oxygen tube (5); The molecular sieve oxygen source (1) and the emergency oxygen cylinder oxygen source (2) are respectively connected to the oxygen source switching mechanism of the oxygen conditioning control box (3), and are connected to the optional respirator through the flow regulating mechanism, so that the molecular sieve oxygen device provides four continuous oxygen supply modes: molecular sieve-mask, molecular sieve-nasal oxygen tube, emergency oxygen cylinder-mask, and emergency oxygen cylinder-nasal oxygen; The oxygen control box (3) comprises an oxygen control panel, which is used to switch the four continuous oxygen supply modes through an oxygen supply mode switch and a breathing selection switch on the oxygen control panel, and to adjust the oxygen flow rate in each continuous oxygen supply mode through a flow adjustment knob.

2. The molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function according to claim 1, characterized in that: The oxygen control box (3) comprises: a control module (6), an oxygen source switching valve (7), and a flow regulating valve (8); The control module (6) is electrically connected to the oxygen source switching valve (7) and the flow regulating valve (8) respectively, the molecular sieve oxygen source (1) is connected to the oxygen source switching valve (7) via a first gas path, the emergency oxygen cylinder oxygen source (2) is connected to the oxygen source switching valve (7) via a second gas path, the oxygen source switching valve (7) is connected to the optional respirator via a third gas path, and a flow regulating valve (8) is provided in the third gas path; The oxygen adjustment control box (3) is used to switch the oxygen source switching valve (7) through the control module (6) so that the oxygen source switching valve (7) selects the molecular sieve oxygen source (1) or the emergency oxygen bottle oxygen source (2) to enter the third gas path, and controls the flow regulating valve (8) through the control module (6) so that the oxygen flow rate is continuously adjusted in each continuous oxygen supply mode.

3. The molecular sieve oxygen device with continuous oxygen supply flow rate regulation function according to claim 2, characterized in that: The oxygen supply mode switch and the breathing selection switch on the oxygen control panel in the oxygen control box (3) are electrical switches, which are connected to the control module (6) in the oxygen control box (3) through a circuit; when the pilot operates the oxygen supply mode switch or the breathing selection switch, the internal contacts of the switch can be connected, and the control module (6) is used to collect the gear position signal of the corresponding switch, so as to identify the current oxygen supply mode or breathing apparatus.

4. The molecular sieve oxygen device with continuous oxygen supply flow rate regulation function according to claim 3, characterized in that: The functional switching strategies of the four continuous oxygen supply modes are: Scenario 1: When the pilot switches the oxygen supply mode switch on the oxygen control box (3) to "molecular sieve", the control module (6) identifies the "molecular sieve" and switches the oxygen source switching valve (7) to the first gas path; Scenario 2: When the pilot switches the oxygen supply mode switch on the oxygen control box (3) to "emergency", the control module (6) identifies "emergency" and switches the oxygen source switching valve (7) to the second gas path; Scenario 3, the pilot adjusts the flow control knob, and the control module (6) controls the adjustment opening of the flow control valve (8); Scenario 4, based on scenario 1 or scenario 2, when the pilot uses the oxygen mask (4) to supply oxygen and turns the "mask / nasal oxygen" switch to "mask", the control module (6) recognizes the "mask" signal, that is, the molecular sieve-mask, or emergency oxygen cylinder-mask continuous oxygen supply mode is realized; Scenario 5, based on Scenario 1 or Scenario 2, when the pilot uses the nasal oxygen tube (5) to supply oxygen and turns the "mask / nasal oxygen" switch to "nasal oxygen", the control module (6) recognizes the "nasal oxygen" signal, that is, the molecular sieve-nasal oxygen tube, emergency oxygen cylinder-nasal oxygen continuous oxygen supply mode is realized.

5. The molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function according to any one of claims 1 to 4, characterized in that: The oxygen flow rates under the four continuous oxygen supply modes are determined by taking the flow rate value of the C curve in the national military standard as the boundary value.

6. The molecular sieve oxygen device with continuous oxygen supply flow rate regulation function according to claim 5, characterized in that: The finished gas produced by the molecular sieve oxygen source (1) is mixed oxygen, the finished gas produced by the emergency oxygen cylinder oxygen source (2) is pure oxygen, the oxygen supply mask (4) is a closed mask, and the outlet of the nasal oxygen tube (5) is ambient air; the oxygen concentration ranges under the four continuous oxygen supply modes are required to meet the following conditions: the oxygen concentration inhaled by the pilot is not lower than the C curve concentration at the corresponding flight altitude.

7. The molecular sieve oxygen device with continuous oxygen supply flow rate regulation function according to claim 6, characterized in that: The oxygen flow rate of the emergency oxygen cylinder oxygen source (2) is: Pilot's inhaled air oxygen concentration = (pure oxygen volume + (lung ventilation volume - pure oxygen volume) × 0.2095) / lung ventilation volume; The oxygen flow rate of the molecular sieve oxygen source (1) is: The oxygen concentration of the air inhaled by the pilot = (oxygen enrichment × oxygen concentration of the molecular sieve oxygen source at the corresponding altitude + (pulmonary ventilation volume - oxygen enrichment × oxygen concentration of the molecular sieve oxygen source at the corresponding altitude) × 0.2095) / pulmonary ventilation volume.

8. The molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function according to claim 5, characterized in that: The oxygen control box (3) controls the flow control valve (8) through the control module (6) in the following manner: After the pilot determines the continuous oxygen supply mode for continuous oxygen supply by adjusting the oxygen supply mode switch and the breathing selection switch on the oxygen control panel, the oxygen concentration range in the current continuous oxygen supply mode is obtained according to the relationship between the current continuous oxygen supply mode and the flow value of the C curve, so that the adjustable opening range of the flow control valve (8) is controlled to correspond to the oxygen concentration range in the current continuous oxygen supply mode, and the adjustment range of the flow adjustment knob on the oxygen control panel is the oxygen concentration range in the current continuous oxygen supply mode, so that the continuous oxygen supply flow of the third gas path is adjusted according to the flow adjustment knob on the oxygen control panel by the pilot, and the opening feedback by the flow control valve (8) is dynamically adjusted, so that the opening of the flow control valve (8) is stabilized to the oxygen flow adjusted by the flow adjustment knob.

9. The molecular sieve oxygen device with continuous oxygen supply flow rate adjustment function according to any one of claims 1 to 4, characterized in that: In the optional respirator, the oxygen supply mask (4) and the nasal oxygen tube (5) are selective oxygen outputs. The oxygen supply mask (4) is connected to the oxygen supply mask interface on the oxygen conditioning control box (3), so that the oxygen on the third gas path is delivered to the pilot through the oxygen supply mask (4); if the nasal oxygen tube (5) is selected, the nasal oxygen tube (5) adapter is first connected to the oxygen supply mask (4) interface, and then the nasal oxygen tube (5) is connected to the adapter, so that the oxygen is delivered to the pilot through the nasal oxygen tube (5).

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