Pulse oxygen supply system and pulse oxygen supply control method

Abstract

The present application provides a pulse oxygen supply system and a pulse oxygen supply control method, which relate to the technical field of oxygen supply for medical care. In the present application, the working hole of a first normally closed two-way three-way solenoid valve is communicated with an oxygen inhalation pipeline having a one-way inhalation valve of a closed-type breathing mask, the oxygen outlet of an oxygen supply unit is communicated with the air source hole of the first normally closed two-way three-way solenoid valve, and the air outlet of a positive pressure air supply unit is communicated with the exhaust hole of the first normally closed two-way three-way solenoid valve through a flow detector. Then, according to the gas flow condition detected by the flow detector during the human inhalation stage, the control unit controls the oxygen supply unit to supply oxygen during the human inhalation stage when the first normally closed two-way three-way solenoid valve is energized, and controls the positive pressure air supply unit to supply pressure-maintaining air during the human exhalation stage when the first normally closed two-way three-way solenoid valve is de-energized, so as to effectively reduce the oxygen supply cost in a high-pressure or slightly high-pressure oxygen inhalation environment, and simultaneously improve the oxygen utilization rate and the oxygen inhalation safety.

Description

Technical Field

[0001] This application relates to the technical field of medical oxygen supply, and more particularly, to a pulse oxygen supply system and a pulse oxygen supply control method. Background Art

[0002] With the continuous development of science and technology, people's oxygen supplementation needs are increasing day by day. The application of PSA (Pressure Swing Adsorption) oxygen generation technology is becoming more and more extensive, and high-pressure oxygen chambers, micro-high-pressure oxygen chambers, and portable micro-high-pressure helmets based on PSA technology are also becoming more and more popular. For manufacturers of high-pressure oxygen chambers, micro-high-pressure oxygen chambers, or portable micro-high-pressure helmets, how to effectively save oxygen and simultaneously improve oxygen utilization rate in a high-pressure oxygen inhalation environment or a micro-high-pressure oxygen inhalation environment is an important research direction of current PSA technology. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a pulse oxygen supply system and a pulse oxygen supply control method, which can effectively balance the internal pressure of the oxygen inhalation pipeline and the external high-pressure oxygen inhalation or external micro-high-pressure oxygen inhalation in the exhalation stage of the human body through compressed air in a high-pressure oxygen inhalation environment or a micro-high-pressure oxygen inhalation environment, reduce the inhalation resistance of the oxygen inhaler in the next inhalation stage of the human body, and enable the oxygen provided in the inhalation stage of the human body to effectively meet the oxygen inhalation needs of the human body in cooperation with compressed air when the oxygen inhaler inhales, so as to greatly save the oxygen supply volume, improve the oxygen utilization rate of the oxygen inhaler, and achieve a safe oxygen inhalation effect for the oxygen inhaler, thereby effectively reducing the oxygen supply cost and simultaneously improving the oxygen inhalation effect of the human body.

[0004] To achieve the above purpose, the technical solutions adopted in the embodiments of this application are as follows:

[0005] In a first aspect, this application provides a pulse oxygen supply system, which includes an oxygen supply unit, a first normally closed two-way three-way solenoid valve, a flow detector, a positive pressure air supply unit, and a control unit;

[0006] The oxygen outlet of the oxygen supply unit is communicated with the air source hole of the first normally closed two-way three-way solenoid valve. The air outlet of the positive pressure air supply unit is communicated with the exhaust hole of the first normally closed two-way three-way solenoid valve through the flow detector. The working hole of the first normally closed two-way three-way solenoid valve is communicated with the oxygen inhalation pipeline with a one-way inhalation valve of a closed breathing mask. Wherein, the oxygen supply unit is used to provide oxygen to the closed breathing mask, the positive pressure air supply unit is used to input compressed air into the oxygen inhalation pipeline to balance the internal pressure of the oxygen inhalation pipeline and the micro-high-pressure or high-pressure oxygen inhalation in the oxygen inhalation chamber where the closed breathing mask is located, and the flow detector is used to detect the gas flow condition of the compressed air entering the closed breathing mask through the one-way inhalation valve when the human body inhales;

[0007] The control unit is electrically connected to the first normally closed two-position three-way solenoid valve, the flow detector, the positive pressure air supply unit, and the oxygen supply unit respectively, and is used to control the operating conditions of the first normally closed two-position three-way solenoid valve, the positive pressure air supply unit, and the oxygen supply unit according to the gas flow condition detected by the flow detector, so that the oxygen supply unit supplies oxygen during the human inhalation stage when the first normally closed two-position three-way solenoid valve is energized, and the positive pressure air supply unit supplies pressure-maintaining air during the human exhalation stage when the first normally closed two-position three-way solenoid valve is de-energized.

[0008] In an alternative embodiment, the oxygen supply unit includes an oxygen generator and an oxygen storage tank;

[0009] The oxygen generator is electrically connected to the control unit and is used to generate oxygen under the control of the control unit;

[0010] The oxygen inlet of the oxygen storage tank is communicated with the oxygen outlet of the oxygen generator and is used to store the oxygen prepared by the oxygen generator, wherein the oxygen outlet of the oxygen storage tank is communicated with the air source hole of the first normally closed two-position three-way solenoid valve.

[0011] In an alternative embodiment, the positive pressure air supply unit includes a second normally closed two-position three-way solenoid valve, a normally closed two-position five-way solenoid valve, and a variable frequency scroll air compressor;

[0012] The air inlet of the variable frequency scroll air compressor is communicated with the working hole of the second normally closed two-position three-way solenoid valve, and the exhaust hole of the second normally closed two-position three-way solenoid valve is externally connected to the atmospheric environment. The variable frequency scroll air compressor is used to extract external air for compression when the second normally closed two-position three-way solenoid valve is de-energized;

[0013] The air outlet of the variable frequency scroll air compressor is communicated with the air source hole of the normally closed two-position five-way solenoid valve. The first working hole corresponding to the first sub-solenoid valve of the normally closed two-position five-way solenoid valve is communicated with the exhaust hole of the flow detector and the first normally closed two-position three-way solenoid valve. The first exhaust valve corresponding to the first sub-solenoid valve of the normally closed two-position five-way solenoid valve is externally connected to the atmospheric environment. The variable frequency scroll air compressor transmits compressed air to the oxygen inhalation pipeline when the first sub-solenoid valve of the normally closed two-position five-way solenoid valve is energized.

[0014] In an alternative embodiment, the oxygen supply system further includes an oxygen concentration detector and a third normally closed two-position three-way solenoid valve;

[0015] The air source hole of the second normally closed two-position three-way solenoid valve is communicated with the air outlet of the oxygen absorption chamber where the closed breathing mask is located through the oxygen concentration detector. The variable frequency scroll air compressor is used to extract gas from the oxygen absorption chamber for compression when the second normally closed two-position three-way solenoid valve is powered on. The oxygen concentration detector is used to detect the oxygen concentration of the gas in the oxygen absorption chamber;

[0016] The second working hole of the normally closed two-position five-way solenoid valve corresponding to the second sub-solenoid valve is communicated with the working hole of the third normally closed two-position three-way solenoid valve. The air source hole of the third normally closed two-position three-way solenoid valve is communicated with the air inlet of the oxygen absorption chamber. The second exhaust hole of the normally closed two-position five-way solenoid valve corresponding to the second sub-solenoid valve and the exhaust hole of the third normally closed two-position three-way solenoid valve are both externally connected to the atmospheric environment. The variable frequency scroll air compressor injects compressed air into the oxygen absorption chamber when the second sub-solenoid valve of the normally closed two-position five-way solenoid valve and the third normally closed two-position three-way solenoid valve are both powered on. The variable frequency scroll air compressor discharges the compressed air into the atmospheric environment when the second sub-solenoid valve of the normally closed two-position five-way solenoid valve is powered on and the third normally closed two-position three-way solenoid valve is powered off. The first sub-solenoid valve and the second sub-solenoid valve of the normally closed two-position five-way solenoid valve are switched to be powered on;

[0017] The control unit is electrically connected to the oxygen concentration detector and the third normally closed two-position three-way solenoid valve respectively, and is used to control the third normally closed two-position three-way solenoid valve to be powered on or off according to the oxygen concentration of the gas detected by the oxygen concentration detector when the second normally closed two-position three-way solenoid valve and the second sub-solenoid valve of the normally closed two-position five-way solenoid valve are both powered on, so that the oxygen concentration of the gas in the oxygen absorption chamber does not exceed the preset oxygen concentration threshold.

[0018] In an alternative embodiment, the oxygen supply system further includes a pressure detector for detecting the actual air pressure value in the oxygen absorption chamber;

[0019] The control unit is electrically connected to the pressure detector. When the actual air pressure value detected by the pressure detector exceeds the preset pressure threshold, the control unit controls the second normally closed two-position three-way solenoid valve and the second sub-solenoid valve of the normally closed two-position five-way solenoid valve to be both powered on, and controls the third normally closed two-position three-way solenoid valve to be powered off to lower the actual air pressure value in the oxygen absorption chamber; when the actual air pressure value detected by the pressure detector does not exceed the preset pressure threshold, the control unit controls the second sub-solenoid valve of the normally closed two-position five-way solenoid valve and the third normally closed two-position three-way solenoid valve to be both powered on, and controls the second normally closed two-position three-way solenoid valve to be powered off to increase the actual air pressure value in the oxygen absorption chamber.

[0020] In a second aspect, the present application provides a pulse oxygen supply control method, which is applied to the pulse oxygen supply system described in any one of the foregoing embodiments. The control method includes:

[0021] The control unit obtains historical gas flow data detected by the flow detector within a historical time period;

[0022] The control unit performs human respiratory cycle recognition on the obtained historical gas flow data to obtain the total number of historical respiratory cycles existing within the historical time period and the cycle duration of each historical respiratory cycle;

[0023] The control unit calculates the oxygen supply duration of the oxygen supply unit within the current pulse oxygen supply cycle and the air supply duration of the positive pressure air supply unit within the current pulse oxygen supply cycle based on the total number of recognized historical respiratory cycles and the cycle duration of each historical respiratory cycle, based on a preset human respiratory ratio;

[0024] The control unit controls the first normally closed two-way three-way solenoid valve to be energized within the pulse oxygen supply cycle according to the oxygen supply duration and controls the oxygen supply unit to supply oxygen, and then controls the first normally closed two-way three-way solenoid valve to be de-energized within the pulse oxygen supply cycle according to the air supply duration and controls the positive pressure air supply unit to supply compressed air.

[0025] In an alternative embodiment, the step in which the control unit performs human respiratory cycle recognition on the obtained historical gas flow data to obtain the total number of historical respiratory cycles existing within the historical time period and the cycle duration of each historical respiratory cycle includes:

[0026] Filter out the flow data less than the first preset flow threshold in the obtained historical gas flow data to obtain effective flow data corresponding to the historical time period;

[0027] Perform data clustering processing on the data distribution time of the effective flow data within the historical time period to obtain the respective starting time points of multiple human inhalation phases matching the effective flow data within the historical time period;

[0028] Calculate the time length between two adjacent starting time points to obtain the cycle duration of the corresponding historical respiratory cycle;

[0029] Count the number of cycle lengths calculated to obtain the total number of historical respiratory cycles existing within the historical time period.

[0030] In an alternative embodiment, the step of controlling the positive pressure air supply unit to supply compressed air includes:

[0031] Detect whether the maximum gas flow value in the historical gas flow data is less than a second preset flow threshold, and detect whether there is flow data less than a third preset flow threshold in the historical gas flow data, where the second preset flow threshold is greater than the first preset flow threshold, and the third preset flow threshold is less than the first preset flow threshold;

[0032] In the case where it is detected that the maximum gas flow value in the historical gas flow data is less than the second preset flow threshold and / or there is flow data less than the third preset flow threshold in the historical gas flow data, control the second normally closed two-way three-way solenoid valve included in the positive pressure air supply unit to lose power, control the first sub-solenoid valve of the normally closed two-way five-way solenoid valve included in the positive pressure air supply unit to be energized, and lower the rotational speed of the scroll when the variable frequency scroll air compressor included in the positive pressure air supply unit supplies compressed air.

[0033] In an alternative embodiment, when the pulse oxygen supply system includes an oxygen concentration detector and a third normally closed two-way three-way solenoid valve, the control method further includes:

[0034] The control unit controls the second normally closed two-way three-way solenoid valve and the second sub-solenoid valve of the normally closed two-way five-way solenoid valve included in the positive pressure air supply unit to be energized at a first preset time interval, and controls the third normally closed two-way three-way solenoid valve to be energized, so that the oxygen concentration detector detects the gas oxygen concentration in the oxygen inhalation chamber where the closed breathing mask is located;

[0035] The control unit determines whether the gas oxygen concentration detected by the oxygen concentration detector exceeds a preset oxygen concentration threshold;

[0036] When the control unit determines that the gas oxygen concentration exceeds the preset oxygen concentration threshold, it controls the third normally closed two-way three-way solenoid valve to lose power, so that the variable frequency scroll air compressor included in the positive pressure air supply unit extracts gas from the oxygen inhalation chamber and discharges it into the atmospheric environment;

[0037] When the control unit determines that the gas oxygen concentration does not exceed the preset oxygen concentration threshold, it controls both the second normally closed two-way three-way solenoid valve and the third normally closed two-way three-way solenoid valve to lose power, and controls the first sub-solenoid valve of the normally closed two-way five-way solenoid valve to be energized, so that the variable frequency scroll air compressor included in the positive pressure air supply unit extracts external air, compresses it, and transmits it to the oxygen supply pipeline of the closed breathing mask.

[0038] In an alternative embodiment, when the pulse oxygen supply system further includes a pressure detector, the control method further includes:

[0039] The control unit obtains the actual air pressure value in the oxygen inhalation chamber detected by the pressure detector at a second preset time interval;

[0040] The control unit determines whether the actual air pressure value exceeds a preset pressure threshold;

[0041] When the control unit determines that the actual air pressure value exceeds the preset pressure threshold, it controls the second normally closed two-way three-way solenoid valve and the second sub-solenoid valve of the normally closed two-way five-way solenoid valve to be energized, and controls the third normally closed two-way three-way solenoid valve to be de-energized, and reduces the vortex rotation speed of the variable frequency scroll air compressor to reduce the actual air pressure value in the oxygen inhalation chamber to the preset pressure threshold;

[0042] When the control unit determines that the actual air pressure value does not exceed the preset pressure threshold, it controls the second normally closed two-way three-way solenoid valve to be de-energized, and controls the second sub-solenoid valve of the normally closed two-way five-way solenoid valve and the third normally closed two-way three-way solenoid valve to be energized, and increases the vortex rotation speed of the variable frequency scroll air compressor to increase the actual air pressure value in the oxygen inhalation chamber to the preset pressure threshold.

[0043] In this case, the beneficial effects of the embodiments of the present application include the following:

[0044] This application connects the working hole of the first normally closed two-position three-way solenoid valve with the oxygen supply pipeline of the closed breathing mask having a one-way inhalation valve, connects the oxygen outlet of the oxygen supply unit with the air source hole of the first normally closed two-position three-way solenoid valve, and connects the air outlet of the positive pressure air supply unit to the exhaust hole of the first normally closed two-position three-way solenoid valve through a flow detector. Then, according to the gas flow condition detected by the flow detector for the compressed air provided by the positive pressure air supply unit during the human inhalation stage, the control unit controls the oxygen supply unit to supply oxygen during the human inhalation stage when the first normally closed two-position three-way solenoid valve is energized, and controls the positive pressure air supply unit to maintain pressure during the human exhalation stage when the first normally closed two-position three-way solenoid valve is de-energized. Thus, in a high-pressure oxygen inhalation environment or a slightly high-pressure oxygen inhalation environment, compressed air effectively balances the pressure inside the oxygen supply pipeline and the external high-pressure oxygen inhalation or slightly high-pressure oxygen inhalation during the human exhalation stage, reduces the inhalation resistance of the oxygen inhaler during the next human inhalation stage, and ensures that the compressed air and the oxygen provided during the human inhalation stage can successively enter the closed breathing mask through the one-way inhalation valve when the oxygen inhaler inhales for oxygen supply. At the same time, regardless of how the breathing rhythm of the oxygen inhaler and / or the energization status of the first normally closed two-position three-way solenoid valve change, the alternately provided compressed air and oxygen can effectively ensure the smooth breathing of the oxygen inhaler, enable the oxygen provided during the human inhalation stage to cooperate with the compressed air to effectively meet the human oxygen inhalation demand when the oxygen inhaler inhales, greatly save the oxygen supply volume, improve the oxygen utilization rate of the oxygen inhaler, and achieve the safe oxygen inhalation effect of the oxygen inhaler, thereby effectively reducing the oxygen supply cost and simultaneously improving the human oxygen inhalation effect.

[0045] To make the above objects, features, and advantages of this application more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. Brief Description of the Drawings

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0047] Figure 1 One of the schematic diagrams of the system composition of the pulse oxygen supply system provided by the embodiment of this application;

[0048] Figure 2 Another schematic diagram of the system composition of the pulse oxygen supply system provided by the embodiment of this application;

[0049] Figure 3 Another schematic diagram of the system composition of the pulse oxygen supply system provided by the embodiment of this application;

[0050] Figure 4 One of the flow diagrams of the pulse oxygen supply control method provided by the embodiments of the present application;

[0051] Figure 5 is Figure 4 The flow diagram of the sub-steps included in step S220 in

[0052] Figure 6 Another flow diagram of the pulse oxygen supply control method provided by the embodiments of the present application;

[0053] Figure 7 Another flow diagram of the pulse oxygen supply control method provided by the embodiments of the present application.

[0054] Icon: 10 - Pulse oxygen supply system; 11 - Oxygen supply unit; 12 - First normally closed two-way three-way solenoid valve; 13 - Flow detector; 14 - Positive pressure air supply unit; 15 - Control unit; 111 - Oxygen generator; 112 - Oxygen storage tank; 141 - Second normally closed two-way three-way solenoid valve; 142 - Variable frequency scroll air compressor; 143 - Normally closed two-way five-way solenoid valve; 16 - Oxygen concentration detector; 17 - Third normally closed two-way three-way solenoid valve; 18 - Pressure detector. Specific embodiments

[0055] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0056] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts fall within the scope of protection of the present application.

[0057] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0058] In the description of the present application, it should be understood that 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 terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific circumstances.

[0059] In the description of the present application, it should also be noted that unless otherwise clearly specified and defined, the terms "arrange", "install", "connect" and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood in specific circumstances.

[0060] Through painstaking research, the applicant has found that in the existing pulsed oxygen supply scheme, oxygen is supplied when the user inhales in an atmospheric pressure environment and no oxygen is supplied when the user exhales. This pulsed oxygen supply scheme is only applicable to ordinary oxygen inhalation under atmospheric pressure, and its oxygen inhalation effect is actually 10 - 20 times worse than that under high pressure or micro-high pressure. The oxygen inhalation effect of this pulsed oxygen supply scheme will become extremely poor when applied to high pressure or micro-high pressure environments. The reason is that the natural pressures formed at the gas supply end and the inhalation end in the atmospheric pressure environment are balanced respectively, while there is an obvious negative pressure at the gas supply end and the inhalation end in the high pressure environment or micro-high pressure environment. The existing pulsed oxygen supply scheme cannot effectively detect the human respiratory condition when applied to high pressure or micro-high pressure environments, and cannot achieve the pulsed oxygen supply effect. At the same time, the negative pressure formed between the gas supply end and the inhalation end will greatly hinder the inhalation of the oxygen inhalation personnel, making it impossible for the oxygen inhalation personnel to breathe smoothly and extremely prone to asphyxiation danger.

[0061] To this end, the embodiments of the present application provide a pulse oxygen supply system and a pulse oxygen supply control method, so as to effectively balance the pressure in the oxygen supply pipeline with the external high-pressure oxygen supply or the external slightly high-pressure oxygen supply through compressed air during the exhalation stage of the human body in a high-pressure oxygen inhalation environment or a slightly high-pressure oxygen inhalation environment, reduce the inhalation resistance of the oxygen inhaler during the next inhalation stage of the human body, and enable the oxygen provided during the inhalation stage of the human body to effectively meet the oxygen inhalation needs of the human body in cooperation with the compressed air when the oxygen inhaler inhales, so as to greatly save the oxygen supply volume, improve the oxygen utilization rate of the oxygen inhaler, and achieve the safe oxygen inhalation effect of the oxygen inhaler, thereby effectively reducing the oxygen supply cost and simultaneously improving the oxygen inhalation effect of the human body to effectively solve the above technical problems.

[0062] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0063] Please refer to Figure 1 , Figure 1 FIG. is one of the schematic diagrams of the system composition of the pulse oxygen supply system 10 provided by the embodiments of the present application. In the embodiments of the present application, the pulse oxygen supply system 10 can effectively balance the pressure in the oxygen supply pipeline with the external high-pressure oxygen supply or the external slightly high-pressure oxygen supply through compressed air during the exhalation stage of the human body in a high-pressure oxygen inhalation environment or a slightly high-pressure oxygen inhalation environment, reduce the inhalation resistance of the oxygen inhaler during the next inhalation stage of the human body, and enable the oxygen provided during the inhalation stage of the human body to effectively meet the oxygen inhalation needs of the human body in cooperation with the compressed air when the oxygen inhaler inhales, so as to greatly save the oxygen supply volume, improve the oxygen utilization rate of the oxygen inhaler, and achieve the safe oxygen inhalation effect of the oxygen inhaler, thereby effectively reducing the oxygen supply cost and simultaneously improving the oxygen inhalation effect of the human body. Among them, the above inhalation stage of the human body is the set inhalation time period of the human body at the pulse oxygen supply system 10, and the above exhalation stage of the human body is the set exhalation time period of the human body at the pulse oxygen supply system 10; the above inhalation stage and exhalation stage of the human body may be different from the actual breathing rhythm of the oxygen inhaler, and the pulse oxygen supply system 10 can adjust the above inhalation stage and exhalation stage of the human body according to the actual breathing rhythm of the oxygen inhaler, so that the adjusted inhalation stage and exhalation stage of the human body can substantially match the actual breathing rhythm of the oxygen inhaler.

[0064] In the embodiments of the present application, the pulse oxygen supply system 10 may include an oxygen supply unit 11, a first normally closed two-way three-way solenoid valve 12, a flow detector 13, a positive pressure air supply unit 14, and a control unit 15.

[0065] In this embodiment, the oxygen outlet of the oxygen supply unit 11 is communicated with the air supply hole (i.e., the P hole) of the first normally-closed two-position three-way solenoid valve 12, and the working hole (i.e., the A hole) of the first normally-closed two-position three-way solenoid valve 12 is communicated with the oxygen absorption pipeline of the closed-type breathing mask having a one-way inhalation valve. Thus, when the first normally-closed two-position three-way solenoid valve 12 is powered on, the air path between the air supply hole and the working hole in the first normally-closed two-position three-way solenoid valve 12 is communicated, and at this time, the oxygen supply unit 11 can supply oxygen to the closed-type breathing mask through the first normally-closed two-position three-way solenoid valve 12. Among them, the closed-type breathing mask can be arranged in any one of the oxygen absorption devices such as a hyperbaric oxygen chamber, a micro-hyperbaric oxygen chamber, and a portable micro-hyperbaric helmet. An oxygen absorption chamber for maintaining a hyperbaric oxygen absorption environment or a micro-hyperbaric oxygen absorption environment is constructed in any one of the foregoing oxygen absorption devices, and the closed-type breathing mask is placed in the oxygen absorption chamber, so that the oxygen absorption personnel can absorb oxygen by wearing the closed-type breathing mask in the hyperbaric oxygen absorption environment or the micro-hyperbaric oxygen absorption environment created by the oxygen absorption chamber.

[0066] In this embodiment, the air outlet of the positive pressure air supply unit 14 is communicated with the exhaust hole (i.e., the R hole) of the first normally-closed two-position three-way solenoid valve 12 through the flow detector 13. Thus, when the first normally-closed two-position three-way solenoid valve 12 is powered off, the air path between the exhaust hole and the working hole in the first normally-closed two-position three-way solenoid valve 12 is communicated, and at this time, the positive pressure air supply unit 14 can input compressed air to the oxygen absorption pipeline through the first normally-closed two-position three-way solenoid valve 12. Among them, the flow detector 13 is used to detect the gas flow condition of the compressed air entering the closed-type breathing mask through the one-way inhalation valve when the human body inhales.

[0067] For the closed-type breathing mask, it can include a one-way inhalation valve and a one-way exhalation valve. When the oxygen absorption personnel wearing the closed-type breathing mask inhales, the one-way inhalation valve will automatically open under the action of the inhalation pressure, and the one-way exhalation valve will automatically close under the action of the inhalation pressure, so that the oxygen absorption personnel can directly absorb oxygen through the oxygen absorption pipeline; when the oxygen absorption personnel wearing the closed-type breathing mask exhales, the one-way inhalation valve will automatically close under the action of the exhalation pressure, and the one-way exhalation valve will automatically open under the action of the inhalation pressure to discharge the breathing waste gas generated by the oxygen absorption personnel to the external atmospheric environment through the exhaust pipeline.

[0068] Thus, when the oxygen inhalation personnel wearing the closed - type breathing mask exhale, the one - way inhalation valve automatically closes. At this time, if the positive - pressure air supply unit 14 inputs compressed air into the oxygen inhalation pipeline, the compressed air input into the oxygen inhalation pipeline will effectively balance the internal pressure of the oxygen inhalation pipeline and the micro - high pressure or high pressure of oxygen inhalation in the oxygen inhalation chamber, so as to ensure that there is no negative - pressure obstruction when the oxygen inhalation personnel inhale in the next human inhalation stage, thereby effectively reducing the inhalation resistance of the oxygen inhalation personnel in the next human inhalation stage and avoiding the risks of dyspnea and asphyxia. When the oxygen inhalation personnel wearing the closed - type breathing mask switch from exhalation to inhalation, the one - way inhalation valve automatically opens, and the compressed air filling the oxygen inhalation pipeline will rush towards the closed - type breathing mask like a "flood discharge" under the action of the inhalation pressure, so as to ensure the smooth breathing of the oxygen inhalation personnel through the compressed air and meet the oxygen inhalation needs of the human body. At this time, the gas flow condition detected by the flow detector 13 will instantaneously increase to a large - flow digital signal, so as to accurately judge the start time point of the oxygen inhalation personnel's inhalation based on the time point when the flow detector 13 detects the large - flow digital signal, and then effectively determine the actual breathing rhythm of the oxygen inhalation personnel.

[0069] In this embodiment, the control unit 15 is electrically connected to the first normally - closed two - way three - way solenoid valve 12, the flow detector 13, the positive - pressure air supply unit 14, and the oxygen supply unit 11 respectively. The control unit 15 can accurately judge the start time points of each inhalation of the oxygen inhalation personnel wearing the closed - type breathing mask in the historical time period based on the gas flow condition detected by the flow detector 13, and then deduce the start time points of inhalation and the oxygen inhalation duration matching the human inhalation stage, as well as the start time points of exhalation and the exhalation duration matching the human exhalation stage in the next or next few breathing cycles of the oxygen inhalation personnel, so as to adjust the specific distribution of the above - mentioned human inhalation stage and human exhalation stage to a state adapted to the actual breathing rhythm of the oxygen inhalation personnel.

[0070] At this time, the control unit 15 can control the operating conditions of the first normally closed two-position three-way solenoid valve 12, the positive pressure air supply unit 14, and the oxygen supply unit 11 respectively, so as to control the first normally closed two-position three-way solenoid valve 12 to be energized at the start time point of inhalation. The oxygen supply unit 11 provides oxygen to the oxygen inhalation personnel during the inhalation phase of the human body in the corresponding breathing cycle according to the oxygen inhalation duration, and controls the first normally closed two-position three-way solenoid valve 12 to be de-energized at the start time point of exhalation. The positive pressure air supply unit 14 provides compressed air to the oxygen inhalation pipeline during the exhalation phase of the human body in the corresponding breathing cycle according to the exhalation duration, so as to effectively balance the internal pressure of the oxygen inhalation pipeline with the external high-pressure oxygen inhalation or external micro-high-pressure oxygen inhalation during the exhalation phase of the human body in a high-pressure oxygen inhalation environment or a micro-high-pressure oxygen inhalation environment. Thus, the oxygen supply unit 11 is called to supply oxygen during the inhalation phase of the human body, and the positive pressure air supply unit 14 is called to supply pressure-maintaining air by using the compressed air supply method during the exhalation phase of the human body, so as to realize the pulse-type switching operation of the oxygen supply unit 11 and the positive pressure air supply unit 14 according to the actual breathing rhythm of the oxygen inhalation personnel, ensure that the compressed air provided during the exhalation phase of the human body and the oxygen provided during the inhalation phase of the human body can enter the closed breathing mask successively through the one-way inhalation valve during the inhalation of the oxygen inhalation personnel for oxygen supply, thereby greatly saving the oxygen supply amount, improving the oxygen utilization rate of the oxygen inhalation personnel, avoiding the phenomenon of poor breathing of the oxygen inhalation personnel, and realizing the safe oxygen inhalation effect of the oxygen inhalation personnel.

[0071] In addition, when the oxygen supply unit 11 and the positive pressure air supply unit 14 perform pulse-type switching operation, no matter how the breathing rhythm of the oxygen inhalation personnel and / or the energization status of the first normally closed two-position three-way solenoid valve 12 change, which may lead to the inability of the set inhalation phase and exhalation phase of the human body at the pulse oxygen supply system 10 to be consistent with the actual breathing rhythm of the oxygen inhalation personnel, the oxygen provided by the oxygen supply unit 11 and the compressed air provided by the positive pressure air supply unit 14 can be transmitted to the closed breathing mask through the oxygen inhalation pipeline during the inhalation of the oxygen inhalation personnel, ensuring smooth breathing of the oxygen inhalation personnel, meeting the oxygen inhalation needs of the human body, and realizing the safe oxygen inhalation effect of the oxygen inhalation personnel.

[0072] In an implementation manner of this embodiment, the flow detector 13 can be expressed by an ultrasonic respiration detection sensor.

[0073] In an implementation manner of this embodiment, the control unit 15 may include multiple processors, and the processors may be integrated circuit chips with signal processing capabilities. The processors may be general-purpose processors, including at least one of a central processing unit (CPU), a graphics processing unit (GPU), a network processor (NP), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc., which can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application.

[0074] Thus, through the cooperation among the oxygen supply unit 11, the first normally-closed two-way three-way solenoid valve 12, the flow detector 13, the positive-pressure air supply unit 14, and the control unit 15 in this application, during the exhalation stage of the human body in a high-pressure oxygen inhalation environment or a micro-high-pressure oxygen inhalation environment, compressed air can effectively balance the pressure inside the oxygen inhalation pipeline with the external high-pressure oxygen inhalation or external micro-high-pressure oxygen inhalation, reduce the inhalation resistance of the oxygen inhalation personnel in the next inhalation stage of the human body, and enable the oxygen provided during the inhalation stage of the human body to effectively meet the oxygen inhalation requirements of the human body in cooperation with the compressed air when the oxygen inhalation personnel inhale, so as to greatly save the oxygen supply volume, improve the oxygen utilization rate of the oxygen inhalation personnel, and achieve the safe oxygen inhalation effect of the oxygen inhalation personnel, thereby effectively reducing the oxygen supply cost and simultaneously improving the oxygen inhalation effect of the human body.

[0075] Optionally, in the embodiments of the present application, the oxygen supply unit 11 may include an oxygen generator 111 and an oxygen storage tank 112. Among them, the oxygen generator 111 is electrically connected to the control unit 15 and is used for generating oxygen under the control of the control unit 15; the oxygen inlet of the oxygen storage tank 112 is communicated with the oxygen outlet of the oxygen generator 111 and is used for storing the oxygen prepared by the oxygen generator 111. The oxygen outlet of the oxygen storage tank 112 is communicated with the air source hole (i.e., the P hole) of the first normally-closed two-way three-way solenoid valve 12 and is used for storing the prepared oxygen during the continuous oxygen generation process of the oxygen generator 111, so that when the oxygen supply unit 11 needs to supply oxygen to the closed breathing mask, the oxygen stored in the oxygen storage tank 112 can be directly used to achieve large-flow oxygen supply, thereby directly using a small-flow oxygen generator 111 to achieve the large-flow oxygen supply effect.

[0076] It can be understood that the oxygen supply machine 111 can adopt a scroll compressor to supply the air source, and through intelligent variable frequency control operation, the oxygen supply machine 111 can provide oxygen with a larger air flow to the closed breathing mask while achieving power saving, noise reduction, and volume reduction, realizing the effect of large-flow saturated closed mask oxygen inhalation with a higher oxygen partial pressure.

[0077] Optionally, in the embodiment of the present application, the positive pressure air supply unit 14 may include a second normally closed two-position three-way solenoid valve 141, a variable frequency scroll air compressor 142, and a normally closed two-position five-way solenoid valve 143. Among them, the air inlet of the variable frequency scroll air compressor 142 is communicated with the working hole (i.e., the A hole) of the second normally closed two-position three-way solenoid valve 141, and the exhaust hole (i.e., the R hole) of the second normally closed two-position three-way solenoid valve 141 is externally connected to the atmospheric environment. When the second normally closed two-position three-way solenoid valve 141 loses power, the air path between the exhaust hole and the working hole in the second normally closed two-position three-way solenoid valve 141 is communicated, and at this time, the variable frequency scroll air compressor 142 can extract external air for compression.

[0078] The air outlet of the variable frequency scroll air compressor 142 is communicated with the air source hole (i.e., the P hole) of the normally closed two-position five-way solenoid valve 143. The first working hole (i.e., the 1A hole) corresponding to the first sub-solenoid valve 1 of the normally closed two-position five-way solenoid valve 143 is communicated with the exhaust hole of the flow detector 13 and the first normally closed two-position three-way solenoid valve 12. The first exhaust valve (i.e., the 1R hole) corresponding to the first sub-solenoid valve of the normally closed two-position five-way solenoid valve 143 is externally connected to the atmospheric environment. When the first sub-solenoid valve 1 of the normally closed two-position five-way solenoid valve 143 is powered on, the air path between the air source hole and the first working hole in the normally closed two-position five-way solenoid valve 143 is communicated. At this time, the compressed air generated by the variable frequency scroll air compressor 142 can supply compressed air to the oxygen inhalation pipeline of the closed breathing mask through the normally closed two-position five-way solenoid valve 143 when the first normally closed two-position three-way solenoid valve 12 loses power; when the first sub-solenoid valve 1 of the normally closed two-position five-way solenoid valve 143 loses power, the air path between the first exhaust hole and the first working hole in the normally closed two-position five-way solenoid valve 143 is communicated. At this time, if the first normally closed two-position three-way solenoid valve 12 loses power, the oxygen inhalation pipeline of the closed breathing mask will be communicated with the external air through the first normally closed two-position three-way solenoid valve 12 and the first sub-solenoid valve 1 of the normally closed two-position five-way solenoid valve 143 to ensure that the oxygen inhalation personnel can breathe the external air when the pulse oxygen supply system 10 is powered off, avoiding suffocation.

[0079] It can be understood that the second normally closed two-position three-way solenoid valve 141, the variable frequency scroll air compressor 142, and the normally closed two-position five-way solenoid valve 143 included in the positive pressure air supply unit 14 are respectively electrically connected to the control unit 15. The control unit 15 controls the second normally closed two-position three-way solenoid valve 141 to lose power, controls the first sub-solenoid valve 1 of the normally closed two-position five-way solenoid valve 143 to be energized, and synchronously controls the variable frequency scroll air compressor 142 to continuously perform air compression processing according to the exhalation start time point and the exhalation duration corresponding to the human exhalation stage. Among them, the control unit 15 can effectively increase or decrease the average pressure in the oxygen supply pipeline when the one-way inhalation valve is closed by increasing or decreasing the scroll rotation speed of the variable frequency scroll air compressor 142, so that the average pressure in the oxygen supply pipeline is as consistent as possible with the micro oxygen pressure or high oxygen pressure in the oxygen supply chamber where the closed breathing mask is located, thereby effectively balancing the average pressure in the oxygen supply pipeline and the micro oxygen pressure or high oxygen pressure in the oxygen supply chamber where the closed breathing mask is located during the human exhalation stage.

[0080] Optionally, please refer to Figure 2 , Figure 2 FIG. is the second schematic diagram of the system composition of the pulse oxygen supply system 10 provided by the embodiment of the present application. In the embodiment of the present application, the pulse oxygen supply system 10 may further include an oxygen concentration detector 16 and a third normally closed two-position three-way solenoid valve 17. Among them, the air supply hole (i.e., the P hole) of the second normally closed two-position three-way solenoid valve 141 is communicated with the air outlet of the oxygen supply chamber where the closed breathing mask is located through the oxygen concentration detector 16. When the second normally closed two-position three-way solenoid valve 141 is energized, the air path between the working hole and the air supply hole in the second normally closed two-position three-way solenoid valve 141 is communicated, and the variable frequency scroll air compressor 142 can extract gas from the oxygen supply chamber for compression. At this time, the oxygen concentration detector 16 can detect the gas oxygen concentration in the oxygen supply chamber.

[0081] In this embodiment, the second working hole (i.e., the 2A hole) of the normally-closed two-position five-way solenoid valve 143 corresponding to the second sub-solenoid valve 2 communicates with the working hole (i.e., the A hole) of the third normally-closed two-position three-way solenoid valve 17. The air supply hole (i.e., the P hole) of the third normally-closed two-position three-way solenoid valve 17 communicates with the air inlet of the oxygen inhalation chamber. The second exhaust hole (i.e., the 2R hole) of the normally-closed two-position five-way solenoid valve 143 corresponding to the second sub-solenoid valve 2 and the exhaust hole (i.e., the R hole) of the third normally-closed two-position three-way solenoid valve 17 are both externally connected to the atmospheric environment. Among them, the first sub-solenoid valve 1 and the second sub-solenoid valve 2 of the normally-closed two-position five-way solenoid valve 143 are alternately powered on, that is, the first sub-solenoid valve 1 is powered on while the second sub-solenoid valve 2 is powered off, and the first sub-solenoid valve 1 is powered off while the second sub-solenoid valve 2 is powered on. When the third normally-closed two-position three-way solenoid valve 17 is powered on, the air path between the air supply hole and the working hole in the third normally-closed two-position three-way solenoid valve 17 is connected. At this time, the air inlet of the oxygen inhalation chamber is directly connected to the second working hole of the normally-closed two-position five-way solenoid valve 143; when the third normally-closed two-position three-way solenoid valve 17 is powered off, the air path between the exhaust hole and the working hole in the third normally-closed two-position three-way solenoid valve 17 is connected. At this time, the second working hole of the normally-closed two-position five-way solenoid valve 143 is directly externally connected to the atmospheric environment, and the air inlet of the oxygen inhalation chamber is in a closed state to prevent air leakage from the air inlet of the oxygen inhalation chamber.

[0082] When the second sub-solenoid valve 2 of the normally-closed two-position five-way solenoid valve 143 is powered on, the air path between the air supply hole and the second working hole in the normally-closed two-position five-way solenoid valve 143 is connected. At this time, the air outlet of the variable-frequency scroll air compressor 142 is connected to the second working hole of the normally-closed two-position five-way solenoid valve 143 to supply compressed air to the air path connected to the second working hole; when the second sub-solenoid valve 2 of the normally-closed two-position five-way solenoid valve 143 is powered off, the air path between the second exhaust hole and the second working hole in the normally-closed two-position five-way solenoid valve 143 is connected. The air outlet of the variable-frequency scroll air compressor 142 is connected to the first working hole of the normally-closed two-position five-way solenoid valve 143 to supply compressed air to the oxygen inhalation pipeline.

[0083] In this embodiment, the control unit 15 is electrically connected to the oxygen concentration detector 16 and the third normally closed two-position three-way solenoid valve 17 respectively. When the second normally closed two-position three-way solenoid valve 141 and the second sub-solenoid valve 2 of the normally closed five-position two-way solenoid valve 143 are both powered on, the control unit 15 uses the oxygen concentration detector 16 to detect the specific oxygen concentration of the gas extracted from the oxygen inhalation chamber by the variable frequency scroll air compressor 142. Then, it determines whether the oxygen concentration of the gas detected by the oxygen concentration detector 16 exceeds a preset oxygen concentration threshold. When the oxygen concentration of the gas does not exceed the preset oxygen concentration threshold, it controls the third normally closed two-position three-way solenoid valve 17 to be powered on, so that the gas extracted from the oxygen inhalation chamber by the variable frequency scroll air compressor 142 can flow back into the oxygen inhalation chamber. Or when the oxygen concentration of the gas exceeds the preset oxygen concentration threshold, it controls the third normally closed two-position three-way solenoid valve 17 to be de-energized, so that the gas extracted from the oxygen inhalation chamber by the variable frequency scroll air compressor 142 is discharged into the atmospheric environment, thereby effectively ensuring that the actual oxygen concentration in the oxygen inhalation chamber does not exceed the preset oxygen concentration threshold, and reducing the oxygen concentration in the oxygen inhalation chamber to a safe oxygen concentration state. During this process, the oxygen concentration in the oxygen inhalation chamber can enter the safe oxygen concentration state faster by increasing the scroll rotation speed of the variable frequency scroll air compressor 142. Among them, the oxygen concentration detector 16 can be expressed by an ultrasonic oxygen concentration sensor.

[0084] Optionally, please refer to Figure 3 , Figure 3 FIG. 3 is a schematic diagram of the system composition of the pulse oxygen supply system 10 provided by an embodiment of the present application. In the embodiment of the present application, the pulse oxygen supply system 10 may further include a pressure detector 18, and the pressure detector 18 is used to detect the actual air pressure value in the oxygen inhalation chamber.

[0085] In this embodiment, the control unit 15 is electrically connected to the pressure detector 18. Among them, when the actual air pressure value detected by the pressure detector 18 exceeds the preset pressure threshold, the control unit 15 can borrow the above-mentioned second normally-closed two-way three-way solenoid valve 141, variable-frequency scroll air compressor 142, normally-closed two-way five-way solenoid valve 143 and the third normally-closed two-way three-way solenoid valve 17 to relieve pressure on the oxygen inhalation chamber, so as to maintain the actual air pressure value in the oxygen inhalation chamber at the preset pressure threshold state. At this time, the control unit 15 can control the second normally-closed two-way three-way solenoid valve 141 and the second sub-solenoid valve 2 of the normally-closed two-way five-way solenoid valve 143 to be energized, and control the third normally-closed two-way three-way solenoid valve 17 to be de-energized. The variable-frequency scroll air compressor 142 extracts gas from the oxygen inhalation chamber and discharges it into the external atmospheric environment to lower the actual air pressure value in the oxygen inhalation chamber; when the actual air pressure value detected by the pressure detector 18 is less than the preset pressure threshold, the control unit 15 can borrow the above-mentioned second normally-closed two-way three-way solenoid valve 141, variable-frequency scroll air compressor 142, normally-closed two-way five-way solenoid valve 143 and the third normally-closed two-way three-way solenoid valve 17 to boost the pressure of the oxygen inhalation chamber, so as to maintain the actual air pressure value in the oxygen inhalation chamber at the preset pressure threshold state. At this time, the control unit 15 can control the third normally-closed two-way three-way solenoid valve 17 and the second sub-solenoid valve 2 of the normally-closed two-way five-way solenoid valve 143 to be energized, and control the second normally-closed two-way three-way solenoid valve 141 to be de-energized. The variable-frequency scroll air compressor 142 extracts gas from the external atmospheric environment, compresses it and then inputs it into the oxygen inhalation chamber to increase the actual air pressure value in the oxygen inhalation chamber.

[0086] During this process, the control unit 15 can compare the actual air pressure value detected by the pressure detector 18 with the preset pressure threshold, and then when the actual air pressure value exceeds the preset pressure threshold, lower the scroll rotation speed of the variable-frequency scroll air compressor 142, or when the actual air pressure value is less than the preset pressure threshold, increase the scroll rotation speed of the variable-frequency scroll air compressor 142, so that the actual air pressure value in the oxygen inhalation chamber can gradually change to the state of the preset pressure threshold, avoiding causing a serious impact on the oxygen inhalation personnel, so as to effectively ensure the micro-high pressure / high pressure oxygen inhalation effect of the oxygen inhalation personnel.

[0087] In this application, to ensure that the above-mentioned pulse oxygen supply system 10 can effectively balance the pressure in the oxygen supply pipeline with the external high-pressure oxygen inhalation environment or micro-high-pressure oxygen inhalation environment during the exhalation stage of the human body through compressed air, reduce the inhalation resistance of the oxygen inhaler during the next inhalation stage of the human body, and enable the oxygen provided during the inhalation stage of the human body to effectively meet the oxygen inhalation needs of the human body in cooperation with the compressed air when the oxygen inhaler inhales, so as to greatly save the oxygen supply volume, improve the oxygen utilization rate of the oxygen inhaler, and achieve the safe oxygen inhalation effect of the oxygen inhaler, thereby effectively reducing the oxygen supply cost and simultaneously improving the oxygen inhalation effect of the human body. The embodiments of this application achieve the foregoing functions by providing a pulse oxygen supply control method applied to the above-mentioned pulse oxygen supply system 10. The pulse oxygen supply control method provided by the embodiments of this application will be elaborated in detail below.

[0088] Please refer to Figure 4 , Figure 4 which is one of the flow schematic diagrams of the pulse oxygen supply control method provided by the embodiments of this application. In the embodiments of this application, the pulse oxygen supply control method may include step S210 to step S240.

[0089] Sub-step S210, the control unit acquires the historical gas flow data detected by the flow detector within a historical time period.

[0090] Step S220, the control unit performs human respiratory cycle recognition on the acquired historical gas flow data to obtain the total number of historical respiratory cycles existing within the historical time period and the cycle duration of each historical respiratory cycle.

[0091] In this embodiment, a single human respiratory cycle is obtained by splicing the inhalation duration of a human inhalation stage and the exhalation duration of a human exhalation stage. There may be small flow data in the historical gas flow data detected by the flow detector 13 due to the one-way inhalation valve not fully closing during the exhalation of the oxygen inhaler. The reason for the one-way inhalation valve not fully closing may be the change in the breathing rhythm of the oxygen inhaler or the pressure in the oxygen supply pipeline slightly exceeding the external high-pressure oxygen inhalation or micro-high-pressure oxygen inhalation. Therefore, the control unit 15 needs to perform data cleaning on the historical gas flow data to obtain effective flow data that substantially matches the human inhalation stage, and then through clustering processing of the effective flow data, obtain the respective starting time points of multiple human inhalation stages within the historical time period that match the effective flow data. Then, by taking the time period between the starting time points of two adjacent human inhalation stages as a historical respiratory cycle and taking the time length of this time period as the cycle duration of the foregoing historical respiratory cycle, the total number of historical respiratory cycles existing within the historical time period and the cycle duration of each historical respiratory cycle are obtained.

[0092] Optionally, please refer toFigure 5 , Figure 5 is Figure 4 The flowchart of the sub-steps included in step S220 in. In the embodiments of the present application, the step S220 may include sub-steps S221 to S224 to effectively determine the total number of historical breathing cycles existing within the historical time period and the cycle duration of each historical breathing cycle.

[0093] Sub-step S221: Filter the flow rate data less than the first preset flow rate threshold in the obtained historical gas flow rate data to obtain effective flow rate data corresponding to the historical time period.

[0094] Wherein, the first preset flow rate threshold is used to distinguish whether the gas flow rate data detected by the flow rate detector 13 is in the human body's inhalation stage.

[0095] Sub-step S222: Perform data clustering processing on the data distribution time of the effective flow rate data within the historical time period to obtain the respective starting time points of multiple human body inhalation stages that match the effective flow rate data within the historical time period.

[0096] Sub-step S223: Calculate the time length between two adjacent starting time points to obtain the cycle duration of the corresponding historical breathing cycle.

[0097] Sub-step S224: Count the number of cycle durations calculated to obtain the total number of historical breathing cycles existing within the historical time period.

[0098] Thus, the present application can effectively determine the total number of historical breathing cycles existing within the historical time period and the cycle duration of each historical breathing cycle by executing the above sub-steps S221 to S224.

[0099] Step S230: The control unit calculates the oxygen supply duration of the oxygen supply unit in the current pulse oxygen supply cycle and the air supply duration of the positive pressure air supply unit in the current pulse oxygen supply cycle based on the total number of identified historical breathing cycles and the cycle duration of each historical breathing cycle according to a preset human breathing ratio.

[0100] In this embodiment, the ratio between the human body's inhalation duration and exhalation duration corresponding to the preset human breathing ratio is close to 1:2. Therefore, the control unit 15 can perform a cycle duration average operation based on the cycle durations of all identified historical breathing cycles and the total number of historical breathing cycles to obtain the corresponding average breathing cycle duration, and then divide the average breathing cycle duration according to the human breathing ratio to obtain the oxygen supply duration of the oxygen supply unit 11 in the next or the next few pulse oxygen supply cycles, and the air supply duration of the positive pressure air supply unit 14 in the next or the next few pulse oxygen supply cycles.

[0101] Step S240: The control unit controls the normally-closed two-position three-way solenoid valve 12 to be energized within the pulse oxygen supply cycle according to the oxygen supply duration, and controls the oxygen supply unit to supply oxygen. Then, according to the air supply duration, the control unit controls the normally-closed two-position three-way solenoid valve 12 to be de-energized within the pulse oxygen supply cycle, and controls the positive pressure air supply unit to supply compressed air.

[0102] In this embodiment, after obtaining the oxygen supply duration and the air supply duration within the next or the next few pulse oxygen supply cycles, the control unit 15 can control the normally-closed two-position three-way solenoid valve 12 to be energized according to the oxygen supply duration at the inhalation start time point within the next or the next few pulse oxygen supply cycles, and control the oxygen supply unit 11 to supply oxygen. Then, at the exhalation start time point within the next or the next few pulse oxygen supply cycles, the control unit 15 controls the normally-closed two-position three-way solenoid valve 12 to be de-energized according to the air supply duration, and controls the positive pressure air supply unit 14 to supply compressed air, so as to dynamically adjust the pulse oxygen supply action of the pulse oxygen supply system 10 based on the historical breathing flow data of the oxygen inhalation person, and make the pulse oxygen supply action of the pulse oxygen supply system 10 substantially match the breathing rhythm of the oxygen inhalation person, so as to improve the micro-high-pressure oxygen inhalation experience of the oxygen inhalation person.

[0103] Optionally, in this embodiment, the step in which the control unit 15 controls the positive pressure air supply unit 14 to supply compressed air may include:

[0104] Detect whether the maximum gas flow value in the historical gas flow data is less than a second preset flow threshold, and detect whether there is flow data less than a third preset flow threshold in the historical gas flow data, where the second preset flow threshold is greater than the first preset flow threshold, and the third preset flow threshold is less than the first preset flow threshold;

[0105] In the case where it is detected that the maximum gas flow value in the historical gas flow data is less than the second preset flow threshold and / or there is flow data less than the third preset flow threshold in the historical gas flow data, control the second normally-closed two-position three-way solenoid valve 141 included in the positive pressure air supply unit 14 to be de-energized, control the first sub-solenoid valve 1 of the normally-closed two-position five-way solenoid valve 143 included in the positive pressure air supply unit 14 to be energized, and reduce the vortex rotation speed when the variable-frequency scroll air compressor 142 included in the positive pressure air supply unit 14 supplies compressed air.

[0106] Wherein, the second preset flow threshold is used to verify whether the compressed air for pressure balance is sufficient during human inhalation, and the third preset flow threshold is used to verify whether the one-way inhalation valve is completely closed during the human exhalation phase. If the maximum gas flow value in the historical gas flow data is less than the second preset flow threshold, and / or there is flow data in the historical gas flow data that is less than the third preset flow threshold, it indicates that the current vortex rotation speed of the variable-frequency scroll air compressor 142 included in the positive pressure air supply unit 14 will cause the internal pressure of the oxygen supply pipe to exceed the micro-high oxygen pressure or high oxygen pressure in the oxygen inhalation chamber during the human exhalation phase, and the internal pressure of the pipe is not actually balanced with the micro-high oxygen pressure or high oxygen pressure in the oxygen inhalation chamber. Therefore, when it is necessary to control the positive pressure air supply unit 14 to supply pressure-maintaining air to the oxygen supply pipe, the normally-closed two-way three-way solenoid valve 141 included in the positive pressure air supply unit 14 can be controlled to lose power, the first sub-solenoid valve 1 of the normally-closed two-way five-way solenoid valve 143 included in the positive pressure air supply unit 14 can be controlled to be energized, and the vortex rotation speed of the variable-frequency scroll air compressor 142 included in the positive pressure air supply unit 14 during compressed air supply can be lowered, so as to effectively balance the internal pressure of the oxygen supply pipe and the micro-high oxygen pressure or high oxygen pressure in the oxygen inhalation chamber where the closed breathing mask is located, thereby effectively improving the breathing smoothness of the oxygen inhalation personnel.

[0107] Thus, through the specific step process included in the above step S240, the present application can effectively balance the internal pressure of the oxygen supply pipe and the micro-high oxygen pressure or high oxygen pressure in the oxygen inhalation chamber where the closed breathing mask is located during the process of controlling the positive pressure air supply unit 14 to supply compressed air in the human exhalation phase, so as to effectively improve the breathing smoothness of the oxygen inhalation personnel.

[0108] Meanwhile, through the execution of the above steps S210 to S240, the present application can effectively balance the internal pressure of the oxygen supply pipe with the external high oxygen pressure or external micro-high oxygen pressure through compressed air in the human exhalation phase in a high-pressure oxygen inhalation environment or a micro-high-pressure oxygen inhalation environment, reduce the inhalation resistance of the oxygen inhalation personnel in the next human inhalation phase, and ensure that the compressed air and the oxygen provided in the human inhalation phase can enter the closed breathing mask for oxygen supply successively through the one-way inhalation valve when the oxygen inhalation personnel inhale. At the same time, regardless of how the breathing rhythm of the oxygen inhalation personnel and / or the energization status of the first normally-closed two-way three-way solenoid valve 12 change, the alternately provided compressed air and oxygen can effectively ensure the smooth breathing of the oxygen inhalation personnel, so that the oxygen provided in the human inhalation phase can cooperate with the compressed air to effectively meet the oxygen inhalation needs of the human body when the oxygen inhalation personnel inhale, thereby greatly saving the oxygen supply amount, improving the oxygen utilization rate of the oxygen inhalation personnel, and achieving the safe oxygen inhalation effect of the oxygen inhalation personnel, further effectively reducing the oxygen supply cost, and simultaneously improving the human oxygen inhalation effect.

[0109] Optionally, please refer to Figure 6, Figure 6 This is the second schematic flowchart of the pulse oxygen supply control method provided by the embodiments of the present application. In the embodiments of the present application, when the pulse oxygen supply system 10 includes an oxygen concentration detector 16 and a third normally closed two-way three-way solenoid valve 17, compared with Figure 4 the pulse oxygen supply control method shown, Figure 6 the pulse oxygen supply control method shown may further include steps S250 to S280 to maintain the gas oxygen concentration in the oxygen inhalation chamber where the closed breathing mask is located at a safe oxygen concentration state at intervals.

[0110] Step S250: The control unit controls the second sub-solenoid valve of the second normally closed two-way three-way solenoid valve and the normally closed two-way five-way solenoid valve included in the positive pressure air supply unit to be energized at a first preset time interval, and controls the third normally closed two-way three-way solenoid valve to be energized, so that the oxygen concentration detector detects the gas oxygen concentration in the oxygen inhalation chamber where the closed breathing mask is located.

[0111] In this embodiment, the time length of the first preset time interval is within 5 to 10 minutes. The control unit 15 can control the second sub-solenoid valve 2 of the second normally closed two-way three-way solenoid valve 141 and the normally closed two-way five-way solenoid valve 143 to be energized, and control the third normally closed two-way three-way solenoid valve 17 to be energized, so that the variable frequency scroll air compressor 142 extracts gas from the oxygen inhalation chamber, compresses it, and then returns and transmits it to the oxygen inhalation chamber. At this time, the oxygen concentration detector 16 can effectively detect the gas oxygen concentration in the oxygen inhalation chamber where the closed breathing mask is located.

[0112] Step S260: The control unit determines whether the gas oxygen concentration detected by the oxygen concentration detector exceeds a preset oxygen concentration threshold.

[0113] Step S270: When the control unit determines that the gas oxygen concentration exceeds the preset oxygen concentration threshold, it controls the third normally closed two-way three-way solenoid valve to be de-energized, so that the variable frequency scroll air compressor included in the positive pressure air supply unit extracts gas from the oxygen inhalation chamber and discharges it into the atmospheric environment.

[0114] In this embodiment, if the control unit 15 determines that the gas oxygen concentration in the oxygen inhalation chamber exceeds the preset oxygen concentration threshold, it indicates that the gas oxygen concentration in the oxygen inhalation chamber is not in a safe oxygen concentration state. Then the control unit 15 will correspondingly control the third normally closed two-way three-way solenoid valve 17, so that the variable frequency scroll air compressor 142 included in the positive pressure air supply unit 14 can extract gas from the oxygen inhalation chamber, compress it, and then discharge it into the atmospheric environment, thereby effectively reducing the gas oxygen concentration in the oxygen inhalation chamber and adjusting the gas oxygen concentration in the oxygen inhalation chamber to a safe oxygen concentration state.

[0115] Step S280: When the control unit determines that the gas oxygen concentration does not exceed the preset oxygen concentration threshold, it controls both the second normally closed two-way three-way solenoid valve and the third normally closed two-way three-way solenoid valve to lose power, and controls the first sub-solenoid valve of the normally closed five-way two-way solenoid valve to be powered on, so that the variable-frequency scroll air compressor included in the positive pressure air supply unit extracts external air, compresses it, and then transmits it to the oxygen supply pipeline of the closed breathing mask.

[0116] In this embodiment, if the control unit 15 determines that the gas oxygen concentration in the oxygen inhalation chamber does not exceed the preset oxygen concentration threshold, it indicates that the gas oxygen concentration in the oxygen inhalation chamber is in a safe oxygen concentration state. At this time, there is no need to detect the gas oxygen concentration in the oxygen inhalation chamber anymore, and it is necessary to control the positive pressure air supply unit 14 to supply pressure to the oxygen supply pipeline again. The control unit 15 will correspondingly control the second normally closed two-way three-way solenoid valve 141 and the third normally closed two-way three-way solenoid valve 17 to lose power, and control the first sub-solenoid valve 1 of the normally closed five-way two-way solenoid valve 143 to be powered on, so that the variable-frequency scroll air compressor 142 included in the positive pressure air supply unit 14 extracts external air, compresses it, and then transmits it to the oxygen supply pipeline of the closed breathing mask.

[0117] Thus, the present application can maintain the gas oxygen concentration in the oxygen inhalation chamber where the closed breathing mask is located in a safe oxygen concentration state at intervals by performing the above steps S250 to S280.

[0118] Optionally, please refer to Figure 7 , Figure 7 which is the third schematic flow chart of the pulse oxygen supply control method provided by the embodiment of the present application. In the embodiment of the present application, when the pulse oxygen supply system 10 further includes a pressure detector 18, compared with the Figure 6 shown pulse oxygen supply control method, Figure 7 the shown pulse oxygen supply control method may further include steps S290 to S320 to adjust the oxygen inhalation environmental pressure in the oxygen inhalation chamber to the desired environmental pressure at intervals, so as to effectively maintain the micro-high pressure oxygen inhalation environment or high pressure oxygen inhalation environment of the oxygen inhalation chamber.

[0119] Step S290: The control unit obtains the actual air pressure value in the oxygen inhalation chamber detected by the pressure detector at a second preset time interval.

[0120] Step S300: The control unit determines whether the actual air pressure value exceeds the preset pressure threshold.

[0121] Step S310: When the control unit determines that the actual air pressure value exceeds the preset pressure threshold, it controls the second normally closed two-way three-way solenoid valve and the second sub-solenoid valve of the normally closed two-way five-way solenoid valve to be energized, and controls the third normally closed two-way three-way solenoid valve to be de-energized, and reduces the rotational speed of the scroll of the variable frequency scroll air compressor to reduce the actual air pressure value in the oxygen inhalation chamber to the preset pressure threshold.

[0122] Step S320: When the control unit determines that the actual air pressure value does not exceed the preset pressure threshold, it controls the second normally closed two-way three-way solenoid valve to be de-energized, and controls the second sub-solenoid valve of the normally closed two-way five-way solenoid valve and the third normally closed two-way three-way solenoid valve to be energized, and increases the rotational speed of the scroll of the variable frequency scroll air compressor to increase the actual air pressure value in the oxygen inhalation chamber to the preset pressure threshold.

[0123] Thus, the present application can adjust the oxygen inhalation environmental pressure in the oxygen inhalation chamber to the desired environmental pressure at intervals by performing the above-mentioned steps S290 to S320, so as to effectively maintain the micro-high pressure oxygen inhalation environment or the high pressure oxygen inhalation environment in the oxygen inhalation chamber.

[0124] In the embodiments provided by the present application, it should be understood that the disclosed device and method can also be implemented in other ways. The device embodiments described above are only illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of the device, method, and computer program product according to the embodiments of the present application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0125] In addition, in each embodiment of the present application, each functional module can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part. If the various functions provided by the present application are implemented in the form of software functional modules and sold or used as an independent product, they can be stored in a storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned readable storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.

[0126] In summary, in a pulse oxygen supply system and a pulse oxygen supply control method provided in an embodiment of the present application, the present application connects the working hole of a first normally closed two-way three-way solenoid valve to an oxygen inhalation pipeline with a one-way inhalation valve of a closed respiratory mask, connects the oxygen outlet of an oxygen supply unit to the air source hole of the first normally closed two-way three-way solenoid valve, and connects the air outlet of a positive pressure air supply unit to the exhaust hole of the first normally closed two-way three-way solenoid valve through a flow detector. Then, according to the gas flow condition detected by the flow detector for the compressed air provided by the positive pressure air supply unit during the human inhalation stage, the control unit controls the oxygen supply unit to supply oxygen during the human inhalation stage when the first normally closed two-way three-way solenoid valve is powered on, and controls the positive pressure air supply unit to supply pressure-maintaining air during the human exhalation stage when the first normally closed two-way three-way solenoid valve is powered off. Thus, in a high-pressure oxygen inhalation environment or a slightly high-pressure oxygen inhalation environment, during the human exhalation stage, compressed air effectively balances the pressure in the oxygen inhalation pipeline with the external high oxygen pressure or the external slightly high oxygen pressure, reduces the inhalation resistance of the oxygen inhalation personnel during the next human inhalation stage, and ensures that the compressed air and the oxygen provided during the human inhalation stage can enter the closed respiratory mask through the one-way inhalation valve successively when the oxygen inhalation personnel inhale for oxygen supply. At the same time, regardless of how the breathing rhythm of the oxygen inhalation personnel and / or the power-on status of the first normally closed two-way three-way solenoid valve change, the alternately provided compressed air and oxygen can effectively ensure the smooth breathing of the oxygen inhalation personnel, enable the oxygen provided during the human inhalation stage to effectively meet the human oxygen inhalation demand in cooperation with the compressed air when the oxygen inhalation personnel inhale, greatly save the oxygen supply volume, improve the oxygen utilization rate of the oxygen inhalation personnel, and achieve the safe oxygen inhalation effect of the oxygen inhalation personnel, thereby effectively reducing the oxygen supply cost and simultaneously improving the human oxygen inhalation effect.

[0127] As described above, these are only various embodiments of the present application. However, the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A pulse oxygen supply system, characterized in that, the oxygen supply system includes an oxygen supply unit, a first normally closed two-position three-way solenoid valve, a flow detector, a positive pressure air supply unit and a control unit; the oxygen outlet of the oxygen supply unit is communicated with the air supply hole of the first normally closed two-position three-way solenoid valve, the air outlet of the positive pressure air supply unit is communicated with the exhaust hole of the first normally closed two-position three-way solenoid valve through the flow detector, and the working hole of the first normally closed two-position three-way solenoid valve is communicated with the oxygen inhalation pipeline with a one-way inhalation valve of a closed breathing mask, wherein the oxygen supply unit is used to supply oxygen to the closed breathing mask, the positive pressure air supply unit is used to input compressed air into the oxygen inhalation pipeline to balance the internal pressure of the oxygen inhalation pipeline and the micro-high oxygen pressure or high oxygen pressure in the oxygen inhalation chamber where the closed breathing mask is located, and the flow detector is used to detect the gas flow condition of the compressed air entering the closed breathing mask through the one-way inhalation valve during human inhalation, wherein the one-way inhalation valve automatically opens during human inhalation and automatically closes during human exhalation; the control unit is electrically connected to the first normally closed two-position three-way solenoid valve, the flow detector, the positive pressure air supply unit and the oxygen supply unit respectively, and is used to control the operation conditions of the first normally closed two-position three-way solenoid valve, the positive pressure air supply unit and the oxygen supply unit according to the gas flow condition detected by the flow detector, so that the oxygen supply unit supplies oxygen during the human inhalation stage when the first normally closed two-position three-way solenoid valve is powered on, and the positive pressure air supply unit supplies pressure-maintaining air during the human exhalation stage when the first normally closed two-position three-way solenoid valve is powered off.

2. The oxygen supply system according to claim 1, characterized in that, the oxygen supply unit includes an oxygen generator and an oxygen storage tank; the oxygen generator is electrically connected to the control unit and is used to generate oxygen under the control of the control unit; the oxygen inlet of the oxygen storage tank is communicated with the oxygen outlet of the oxygen generator and is used to store the oxygen prepared by the oxygen generator, wherein the oxygen outlet of the oxygen storage tank is communicated with the air supply hole of the first normally closed two-position three-way solenoid valve.

3. The oxygen supply system according to claim 1 or 2, characterized in that, the positive pressure air supply unit includes a second normally closed two-position three-way solenoid valve, a normally closed two-position five-way solenoid valve and a variable frequency scroll air compressor; the air inlet of the variable frequency scroll air compressor is communicated with the working hole of the second normally closed two-position three-way solenoid valve, and the exhaust hole of the second normally closed two-position three-way solenoid valve is externally connected to the atmospheric environment, wherein the variable frequency scroll air compressor is used to extract external air for compression when the second normally closed two-position three-way solenoid valve is powered off; The air outlet of the variable-frequency scroll air compressor is communicated with the air supply hole of the normally-closed two-position five-way solenoid valve. The first working hole of the normally-closed two-position five-way solenoid valve corresponding to the first sub-solenoid valve is communicated with the exhaust hole of the first normally-closed two-position three-way solenoid valve through the flow detector. The first exhaust valve of the normally-closed two-position five-way solenoid valve corresponding to the first sub-solenoid valve is externally connected to the atmospheric environment. Wherein, when the first sub-solenoid valve of the normally-closed two-position five-way solenoid valve is powered on, the variable-frequency scroll air compressor transmits compressed air to the oxygen inhalation pipeline.

4. The oxygen supply system according to claim 3, characterized in that, the oxygen supply system further comprises an oxygen concentration detector and a third normally-closed two-position three-way solenoid valve; The air supply hole of the second normally-closed two-position three-way solenoid valve is communicated with the air outlet of the oxygen inhalation chamber where the closed-type breathing mask is located through the oxygen concentration detector. Wherein, the variable-frequency scroll air compressor is used to extract gas from the oxygen inhalation chamber for compression when the second normally-closed two-position three-way solenoid valve is powered on, and the oxygen concentration detector is used to detect the oxygen concentration of the gas in the oxygen inhalation chamber; The second working hole of the normally-closed two-position five-way solenoid valve corresponding to the second sub-solenoid valve is communicated with the working hole of the third normally-closed two-position three-way solenoid valve. The air supply hole of the third normally-closed two-position three-way solenoid valve is communicated with the air inlet of the oxygen inhalation chamber. The second exhaust hole of the normally-closed two-position five-way solenoid valve corresponding to the second sub-solenoid valve and the exhaust hole of the third normally-closed two-position three-way solenoid valve are both externally connected to the atmospheric environment. Wherein, when the second sub-solenoid valve of the normally-closed two-position five-way solenoid valve and the third normally-closed two-position three-way solenoid valve are both powered on, the variable-frequency scroll air compressor injects compressed air into the oxygen inhalation chamber. When the second sub-solenoid valve of the normally-closed two-position five-way solenoid valve is powered on and the third normally-closed two-position three-way solenoid valve is powered off, the variable-frequency scroll air compressor discharges compressed air into the atmospheric environment. The first sub-solenoid valve and the second sub-solenoid valve of the normally-closed two-position five-way solenoid valve are powered on in a switching manner; The control unit is electrically connected to the oxygen concentration detector and the third normally-closed two-position three-way solenoid valve respectively, and is used to control the third normally-closed two-position three-way solenoid valve to be powered on or off according to the oxygen concentration of the gas detected by the oxygen concentration detector when the second normally-closed two-position three-way solenoid valve and the second sub-solenoid valve of the normally-closed two-position five-way solenoid valve are both powered on, so that the oxygen concentration of the gas in the oxygen inhalation chamber does not exceed the preset oxygen concentration threshold.

5. The oxygen supply system according to claim 4, characterized in that, the oxygen supply system further comprises a pressure detector, and the pressure detector is used to detect the actual air pressure value in the oxygen inhalation chamber; The control unit is electrically connected to the pressure detector. Wherein, when the actual air pressure value detected by the pressure detector exceeds a preset pressure threshold, the control unit controls the second normally closed two-way three-way solenoid valve and the second sub-solenoid valve of the normally closed two-way five-way solenoid valve to be energized, and controls the third normally closed two-way three-way solenoid valve to be de-energized, so as to lower the actual air pressure value in the oxygen inhalation chamber; when the actual air pressure value detected by the pressure detector does not exceed the preset pressure threshold, the control unit controls the second sub-solenoid valve of the normally closed two-way five-way solenoid valve and the third normally closed two-way three-way solenoid valve to be energized, and controls the second normally closed two-way three-way solenoid valve to be de-energized, so as to increase the actual air pressure value in the oxygen inhalation chamber.

6. A pulse oxygen supply control method, characterized in that, it is applied to the pulse oxygen supply system according to any one of claims 1-5, and the control method includes: The control unit acquires the historical gas flow data detected by the flow detector within a historical time period; The control unit performs human respiratory cycle recognition on the acquired historical gas flow data to obtain the total number of historical respiratory cycles existing within the historical time period and the cycle duration of each historical respiratory cycle; The control unit calculates the oxygen supply duration of the oxygen supply unit in the current pulse oxygen supply cycle and the air supply duration of the positive pressure air supply unit in the current pulse oxygen supply cycle based on the total number of historical respiratory cycles and the cycle duration of each historical respiratory cycle identified, according to a preset human respiration ratio; The control unit controls the first normally closed two-way three-way solenoid valve to be energized and controls the oxygen supply unit to supply oxygen within the pulse oxygen supply cycle according to the oxygen supply duration, and then controls the first normally closed two-way three-way solenoid valve to be de-energized and controls the positive pressure air supply unit to supply compressed air within the pulse oxygen supply cycle according to the air supply duration.

7. The control method according to claim 6, characterized in that, the step in which the control unit performs human respiratory cycle recognition on the acquired historical gas flow data to obtain the total number of historical respiratory cycles existing within the historical time period and the cycle duration of each historical respiratory cycle includes: Filter out the flow data less than a first preset flow threshold in the acquired historical gas flow data to obtain effective flow data corresponding to the historical time period; Perform data clustering processing on the data distribution time of the effective flow data within the historical time period to obtain the respective starting time points of multiple human inhalation stages matching the effective flow data within the historical time period; Calculate the time length between two adjacent starting time points of stages to obtain the cycle duration of the corresponding historical respiratory cycle; Count the number of circumferences of the calculated cycle duration to obtain the total number of historical respiratory cycles existing within the historical time period.

8. The control method according to claim 7, characterized in that, the step of controlling the positive pressure air supply unit to supply compressed air includes: Detect whether the maximum gas flow value in the historical gas flow data is less than a second preset flow threshold, and detect whether there is flow data less than a third preset flow threshold in the historical gas flow data, where the second preset flow threshold is greater than the first preset flow threshold, and the third preset flow threshold is less than the first preset flow threshold; When it is detected that the maximum gas flow value in the historical gas flow data is less than the second preset flow threshold and / or there is flow data less than the third preset flow threshold in the historical gas flow data, control the second normally closed two-way three-way solenoid valve included in the positive pressure air supply unit to lose power, control the first sub-solenoid valve of the normally closed two-way five-way solenoid valve included in the positive pressure air supply unit to be energized, and reduce the vortex rotation speed when the frequency conversion scroll air compressor included in the positive pressure air supply unit supplies compressed air.

9. The control method according to any one of claims 6-8, characterized in that, when the pulse oxygen supply system includes an oxygen concentration detector and a third normally closed two-way three-way solenoid valve, the control method further includes: the control unit controls the second normally closed two-way three-way solenoid valve and the second sub-solenoid valve of the normally closed two-way five-way solenoid valve included in the positive pressure air supply unit to be energized at a first preset time interval, and controls the third normally closed two-way three-way solenoid valve to be energized, so that the oxygen concentration detector detects the gas oxygen concentration in the oxygen inhalation chamber where the closed breathing mask is located; the control unit determines whether the gas oxygen concentration detected by the oxygen concentration detector exceeds a preset oxygen concentration threshold; when the control unit determines that the gas oxygen concentration exceeds the preset oxygen concentration threshold, control the third normally closed two-way three-way solenoid valve to lose power, so that the frequency conversion scroll air compressor included in the positive pressure air supply unit extracts gas from the oxygen inhalation chamber and discharges it into the atmospheric environment; when the control unit determines that the gas oxygen concentration does not exceed the preset oxygen concentration threshold, control both the second normally closed two-way three-way solenoid valve and the third normally closed two-way three-way solenoid valve to lose power, and control the first sub-solenoid valve of the normally closed two-way five-way solenoid valve to be energized, so that the frequency conversion scroll air compressor included in the positive pressure air supply unit extracts external air, compresses it, and transmits it to the oxygen inhalation pipeline of the closed breathing mask.

10. The control method according to claim 9, characterized in that, when the pulse oxygen supply system further includes a pressure detector, the control method further includes: the control unit obtains the actual air pressure value in the oxygen inhalation chamber detected by the pressure detector at a second preset time interval; the control unit determines whether the actual air pressure value exceeds a preset pressure threshold; When the control unit determines that the actual air pressure value exceeds the preset pressure threshold, it controls the second normally closed two-position three-way solenoid valve and the second sub-solenoid valve of the normally closed two-position five-way solenoid valve to be energized, and controls the third normally closed two-position three-way solenoid valve to be de-energized, and reduces the vortex rotation speed of the variable frequency scroll air compressor to reduce the actual air pressure value in the oxygen inhalation chamber to the preset pressure threshold; When the control unit determines that the actual air pressure value does not exceed the preset pressure threshold, it controls the second normally closed two-position three-way solenoid valve to be de-energized, and controls the second sub-solenoid valve of the normally closed two-position five-way solenoid valve and the third normally closed two-position three-way solenoid valve to be energized, and increases the vortex rotation speed of the variable frequency scroll air compressor to increase the actual air pressure value in the oxygen inhalation chamber to the preset pressure threshold.

Images