Oxygen-saving device

Abstract

The invention belongs to the technical field of medical instruments, and discloses an oxygen saving device which comprises an air supply pipeline with an air inlet and an oxygen outlet and a first pressure tapping pipeline communicated with the oxygen outlet. The throttling unit and the switch unit are sequentially arranged on the air supply pipeline, and the pressure difference detection unit is arranged on the first pressure tapping pipeline. The control unit is in communication connection with the pressure difference detection unit and the switch unit; the throttling unit is used for controlling the oxygen flow and outputting the oxygen flow to the switch unit; the switch unit is used for controlling the on-off of the gas supply pipeline; the pressure difference detection unit is used for detecting the difference between the atmospheric pressure and the gas pressure in the first pressure tapping pipeline and sending the difference to the control unit; the control unit is used for opening the switch unit when judging that the user inhales based on the pressure difference; otherwise, closing. The pressure difference detection unit is used for detecting inspiration of a user, the control unit controls the switch unit to open and close the air supply pipeline, the air supply pipeline is opened for oxygen supply only when the user inspires, the oxygen utilization rate can be effectively increased, and the use time can be effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an oxygen-saving device. Background Art

[0002] In plateau environments, soldiers patrolling or tourists playing need to be equipped with oxygen breathing equipment to prevent physical damage caused by lack of oxygen in the plateau. Currently, oxygen cylinders or small oxygen generators are commonly used to supply oxygen.

[0003] Existing oxygen cylinders are small in size and can store less oxygen. Continuously supplying oxygen to users is wasteful and cannot be used for a long time. Summary of the invention

[0004] The purpose of the present invention is to provide an oxygen-saving device.

[0005] Provided is an oxygen-saving device, comprising: an air supply pipeline having an air inlet and an oxygen outlet, and a first pressure-taking pipeline connected to the oxygen outlet; a throttling unit and a switch unit sequentially arranged on the air supply pipeline, a pressure difference detection unit arranged on the first pressure-taking pipeline; a control unit communicatively connected to the pressure difference detection unit and the switch unit;

[0006] The throttling unit is used to control the flow rate of oxygen entering from the air inlet and output it to the switch unit;

[0007] The switch unit is used to control the on and off of the gas supply pipeline under the control of the control unit;

[0008] The pressure difference detection unit is used to detect the difference between the atmospheric pressure and the gas pressure in the first pressure-taking pipeline, obtain the pressure difference and send it to the control unit;

[0009] The control unit is used to determine whether the user inhales based on the pressure difference, and if so, turn on the switch unit; otherwise, turn off the switch unit.

[0010] In an improved oxygen-saving device, it also includes: a flow stabilizing unit disposed on the gas supply pipeline and located between the throttling unit and the switch unit;

[0011] The flow stabilization unit is used to detect the flow rate or pressure of the oxygen output from the throttling unit and send the detection result to the control unit;

[0012] The control unit is specifically used to adjust the opening time based on the received detection result, and when it is judged that the user inhales based on the pressure difference, control the switch unit to open the air supply pipeline according to the adjusted opening time.

[0013] In an improved oxygen-saving device, the flow stabilizing unit includes: a flow sensor; or a pressure sensor, and the pressure sensor is arranged in a second pressure-taking pipeline, and the second pressure-taking pipeline is connected to the air supply pipeline.

[0014] In an improved oxygen-saving device, it also includes: a flow stabilizing unit disposed on the gas supply pipeline and located between the switch unit and the pressure difference detection unit;

[0015] The flow stabilization unit is used to detect the flow rate or pressure of oxygen output from the switch unit and send the detection result to the control unit;

[0016] The control unit is specifically used to adjust the opening time based on the received detection result, and when it is judged that the user inhales based on the pressure difference, control the switch unit to open the air supply pipeline according to the adjusted opening time.

[0017] In an improved oxygen-saving device, the flow stabilizing unit includes: a flow sensor; or a pressure sensor, and the pressure sensor is arranged in a second pressure-taking pipeline, and the second pressure-taking pipeline is connected to the air supply pipeline.

[0018] In an improved oxygen-saving device, it also includes: a flow stabilizing unit disposed on the gas supply pipeline and located between the throttling unit and the switch unit;

[0019] The flow stabilizing unit is a pressure stabilizing valve, which is used to stabilize the pressure of the oxygen output from the throttling unit.

[0020] In an improved oxygen-saving device, the pressure difference detection unit includes: a pressure difference sensor.

[0021] In an improved oxygen-saving device, the switch unit includes: a two-position two-way valve.

[0022] In an improved oxygen-saving device, the gas source of the oxygen-saving device is an oxygen cylinder whose oxygen outlet is a downwardly pressed oxygen outlet valve;

[0023] The oxygen-saving device also includes: a shell for realizing bayonet connection with the oxygen cylinder, a groove arranged around the air inlet and sealing silica gel, wherein after the oxygen cylinder is placed in the shell, the oxygen outlet of the oxygen cylinder and the air inlet of the oxygen-saving device are sealed and the oxygen outlet valve is opened.

[0024] In an improved oxygen-saving device, the gas source of the oxygen-saving device is an oxygen cylinder whose oxygen outlet is a downwardly pressed oxygen outlet valve;

[0025] The oxygen-saving device also includes: a front shell with threads and a rear shell with a nut for connecting with the threaded mouth of the oxygen cylinder; the front shell has grooves and sealing silicone arranged around the air inlet inside; wherein, by rotating the threads of the rear shell and the front shell, the oxygen outlet and the air inlet of the oxygen cylinder are pressed tightly and the oxygen outlet valve of the oxygen cylinder is opened.

[0026] Compared with the prior art, the advantages of the present invention are:

[0027] 1. The embodiment of the present invention uses a pressure difference sensor to detect the user's inhalation, and controls the two-position three-way valve through the control unit to realize the opening and closing of the air supply pipeline. When the user inhales, the air supply pipeline is opened to supply oxygen, and when the user exhales, the oxygen outlet is closed, which can effectively improve the oxygen utilization rate and usage time, and avoid waste;

[0028] 2. The embodiment of the present invention determines the oxygen flow or pressure through a pressure sensor or a flow sensor, triggers the control unit to adjust the opening time of the switch unit, stabilizes the oxygen volume at the oxygen outlet, or uses a pressure regulating valve to stabilize the oxygen pressure and thus stabilize the oxygen volume at the oxygen outlet, so as to provide a stable amount of oxygen to the user when the user inhales, and realizes oxygen saving while reasonably supplying oxygen;

[0029] 3. The embodiment of the present invention provides three ways of connecting with oxygen cylinders, which are convenient for use with oxygen cylinders and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the first structure of the oxygen-saving device of Example 1 of the present invention;

[0031] Figure 2 is a second structural schematic diagram of the oxygen-saving device of Example 1 of the present invention;

[0032] Figure 3 is a third structural schematic diagram of the oxygen-saving device of Example 1 of the present invention;

[0033] Figure 4 2 is a schematic diagram of a structure in which an oxygen-saving device according to Embodiment 2 of the present invention is connected to an oxygen cylinder through a pipeline;

[0034] Figure 5 Schematic diagram of the connection process and state change between the oxygen-saving device and the oxygen cylinder bayonet of Example 2 of the present invention;

[0035] Figure 6 It is a schematic diagram of the threaded connection process and state changes between the oxygen-saving device and the oxygen cylinder in Example 2 of the present invention.

[0036] Reference numerals

[0037] 100. Oxygen cylinder 101. Oxygen saving device

[0038] 200. Oxygen outlet of oxygen cylinder 201. Air inlet of oxygen saving device

[0039] 202, oxygen outlet of oxygen-saving device 300, throttle valve

[0040] 301, pressure sensor 302, two-position two-way valve

[0041] 303, differential pressure sensor 304, control board

[0042] 305. Battery 306. Flow sensor

[0043] 307, pressure regulating valve 400, connecting pipeline

[0044] 501, oxygen-saving device front shell 502, oxygen-saving device rear shell DETAILED DESCRIPTION

[0045] The solution of the embodiment of the present invention provides an oxygen-saving device, comprising an air supply pipeline having an air inlet and an oxygen outlet and a first pressure-taking pipeline connected to the oxygen outlet; a throttling unit and a switch unit sequentially arranged on the air supply pipeline, a pressure difference detection unit arranged on the first pressure-taking pipeline; and a control unit communicatively connected to the pressure difference detection unit and the switch unit. On the one hand, the throttling unit controls the oxygen flow rate to achieve oxygen saving; on the other hand, the control unit uses the detection signal of the pressure difference detection unit on the user's inhalation to control the switch unit to achieve oxygen saving.

[0046] The technical solution of the present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0047] Example 1

[0048] Embodiment 1 of the present invention provides an oxygen-saving device, comprising an air supply pipeline having an air inlet and an oxygen outlet and a first pressure-taking pipeline connected to the oxygen outlet; a throttling unit and a switch unit sequentially arranged on the air supply pipeline, a pressure difference detection unit arranged on the first pressure-taking pipeline; a control unit communicatively connected to the pressure difference detection unit and the switch unit;

[0049] The throttling unit is used to control the flow rate of oxygen entering from the air inlet and output it to the switch unit;

[0050] The switch unit is used to control the on and off of the gas supply pipeline under the control of the control unit;

[0051] The pressure difference detection unit is used to detect the difference between the atmospheric pressure and the gas pressure in the first pressure-taking pipeline, obtain the pressure difference and send it to the control unit;

[0052] The control unit is used to determine whether the user inhales based on the pressure difference, and if so, turn on the switch unit; otherwise, turn off the switch unit.

[0053] Preferably, the pressure difference detection unit includes: a pressure difference sensor.

[0054] Preferably, the switch unit is a two-position two-way valve.

[0055] Preferably, in order to further save oxygen while using it reasonably, the oxygen-saving device further includes a flow stabilizing unit, which has the following three implementation methods:

[0056] The first implementation method: a flow stabilizing unit is arranged on the gas supply pipeline and is located between the throttling unit and the switch unit, and the flow stabilizing unit is used to detect the flow rate or pressure of oxygen output from the throttling unit, and send the detection result to the control unit; the control unit is specifically used to adjust the opening time based on the received detection result, and when it is judged that the user inhales based on the pressure difference, the switch unit is controlled to open the gas supply pipeline according to the adjusted opening time.

[0057] Through the first implementation method mentioned above, the flow stabilization unit determines the oxygen flow or pressure, triggers the control unit to adjust the opening time of the switch unit, and saves oxygen. In the control unit, the detection results of the pressure difference detection unit and the detection results of the flow stabilization unit are integrated to coordinate the opening of the switch unit. When the detection result is that the user inhales, the switch unit opens the gas supply pipeline according to the adjusted opening time, which saves oxygen while meeting the actual oxygen inhalation needs of the user, achieving the technical effect of making the best use of oxygen.

[0058] Specifically, the flow stabilization unit includes: a pressure sensor, the pressure sensor is arranged in the second pressure-taking pipeline, and the second pressure-taking pipeline is connected to the air supply pipeline. The pressure sensor can also be replaced by a flow sensor.

[0059] When the flow stabilizing unit is a pressure sensor, the structural schematic diagram of the oxygen-saving device according to the embodiment of the present invention is as follows: Figure 1 As shown, it is a first structural schematic diagram of the oxygen-saving device provided in an embodiment of the present invention, including: a housing, a throttle valve 300 connected in sequence through an air supply pipeline, a pressure sensor 301, a two-position two-way valve 302, a pressure difference sensor 303, a control board 304 and a battery 305.

[0060] Here’s how it works:

[0061] After the oxygen outlet 200 of the oxygen cylinder 100 is connected to the oxygen-saving device 101, oxygen enters the oxygen-saving device 101 through the air inlet 201, and after passing through the throttle valve 300, the pressure sensor 301 detects the pressure of the oxygen in the air supply pipeline in real time, that is, the oxygen tank pressure of the oxygen cylinder 100, and feeds back the detected pressure to the control board 304, and the control board adjusts the opening time of the two-position two-way valve. When the pressure difference sensor 303 detects that the user inhales, it feeds back to the control board 304, and the control board opens the two-position two-way valve according to the adjusted opening time, and the oxygen passes through the oxygen outlet 202 and then enters the human body through the nasal oxygen cannula to complete oxygen inhalation; when the user exhales, the two-position two-way valve 302 is closed, the oxygen outlet 202 stops supplying oxygen, and the oxygen is stored and supplied when the next inhalation occurs.

[0062] The pressure sensor 301 can be located on the control panel to monitor the volume of oxygen in the oxygen tank in real time through pressure changes. The control panel 304 adjusts the opening time of the two-position two-way valve in real time to ensure that the output gas volume is consistent each time.

[0063] When the flow stabilizing unit is the flow sensor 306, the structural diagram of the oxygen-saving device according to the embodiment of the present invention is as follows: Figure 2 As shown, it is a second structural schematic diagram of the oxygen-saving device provided in an embodiment of the present invention, including: a housing, a throttle valve 300, a two-position two-way valve 302, a pressure difference sensor 303, a control board 304, a battery 305 and a flow sensor 306.

[0064] Here’s how it works:

[0065] After the oxygen outlet 200 of the oxygen cylinder 100 is connected to the oxygen-saving device 101, oxygen enters the oxygen-saving device 101 through the air inlet 201, and after passing through the throttle valve 300, the flow sensor 306 detects the flow through the sensor in real time, and feeds the detected flow back to the control board 304, and the control board calculates the opening time of the two-position two-way valve. When the pressure difference sensor 303 detects that the user inhales, the control board 304 controls the two-position two-way valve to open, and oxygen passes through the oxygen outlet 202 and then enters the human body through the nasal oxygen cannula to complete oxygen inhalation; when the user exhales, the pressure difference sensor 303 detects the user's breathing, the two-position two-way valve 302 is closed, the oxygen outlet 202 stops supplying oxygen, and the oxygen is stored for supplying oxygen when the user inhales next time.

[0066] The second implementation method: a flow stabilizing unit is arranged on the gas supply pipeline and is located between the switch unit and the pressure difference detection unit, and the flow stabilizing unit is used to detect the flow rate or pressure of oxygen output from the switch unit, and send the detection result to the control unit; the control unit is specifically used to adjust the opening time based on the received detection result, and when it is judged that the user is inhaling based on the pressure difference, the switch unit is controlled to open the gas supply pipeline according to the adjusted opening time.

[0067] Specifically, the flow stabilization unit includes: a pressure sensor, the pressure sensor is arranged in the second pressure-taking pipeline, and the second pressure-taking pipeline is connected to the air supply pipeline. The pressure sensor can also be replaced by a flow sensor.

[0068] When the flow stabilization unit is a flow sensor, the flow sensor can collect 3-5 oxygen flow rates and feed them back to the control unit at the beginning and when the decreasing function relationship needs to be updated; the control unit uses the collected data to fit the decreasing function relationship between the last oxygen flow rate and the next oxygen flow rate; the next oxygen flow rate is estimated using this decreasing function relationship and the last actual oxygen flow rate measured by the flow sensor; then the estimated next oxygen flow rate and the preset oxygen output each time are used to calculate the opening time of the switch unit; when the control unit determines that the user is inhaling based on the pressure difference, the control unit controls the switch unit to conduct the gas supply pipeline according to the opening time to complete the oxygen supply. The oxygen flow rate here can be a volume flow rate or a mass flow rate.

[0069] Through the second implementation method mentioned above, the flow stabilization unit determines the oxygen flow or pressure, triggers the control unit to adjust the opening time of the switch unit, and saves oxygen. In the control unit, the detection results of the pressure difference detection unit and the detection results of the flow stabilization unit are integrated to coordinate the opening of the switch unit. When the detection result is that the user inhales, the switch unit opens the gas supply pipeline according to the adjusted opening time, which saves oxygen while meeting the actual oxygen inhalation needs of the user, achieving the technical effect of making the best use of oxygen.

[0070] The third implementation method: the flow stabilizing unit is arranged on the gas supply pipeline and is located between the throttling unit and the switch unit, and the flow stabilizing unit is a pressure stabilizing valve for stabilizing the pressure of oxygen output from the throttling unit.

[0071] When the flow stabilizing unit is a pressure stabilizing valve, the structural schematic diagram of the oxygen saving device according to the embodiment of the present invention is as follows: Figure 3 As shown, it is a third structural schematic diagram of the oxygen-saving device provided in an embodiment of the present invention, including: a housing, a throttle valve 300, a two-position two-way valve 302, a pressure difference sensor 303, a control board 304, a battery 305 and a pressure regulating valve 307.

[0072] Here’s how it works:

[0073] After the oxygen outlet 200 of the oxygen cylinder 100 is connected to the oxygen-saving device 101, oxygen enters the oxygen-saving device 101 through the air inlet 201, passes through the throttle valve 300, passes through the pressure-stabilizing valve 307, and is connected to the oxygen outlet 202 after being connected through the two-position two-way valve 302; when the pressure difference sensor 303 detects that the user inhales, it feeds back to the control board 304, and the control board controls the two-position two-way valve to open, and the oxygen passes through the oxygen outlet 202 and then enters the human body through the nasal oxygen tube to complete oxygen inhalation; when the user exhales, the two-position two-way valve 302 is closed, the oxygen outlet 202 stops supplying oxygen, and the oxygen is stored for supplying oxygen when the user inhales next time.

[0074] In the third implementation method mentioned above, the function of the pressure-stabilizing valve is to make the amount of oxygen passing through it consistent per unit time regardless of how the pressure in the oxygen cylinder changes when the amount of oxygen in the cylinder decreases or increases. At this time, the pressure-stabilizing input of the pressure-stabilizing valve is input to the control board, and the control board can adjust the opening time of the two-position two-way valve.

[0075] Figure 1 , Figure 2 and Figure 3 In the oxygen-saving device shown in , the functions of the pressure sensor 301, the flow sensor 306 and the pressure-stabilizing valve 307 are to ensure that the gas volume of the oxygen outlet 202 is controllable. Figure 1 The oxygen-saving device calculates the volume of gas retained in the gas cylinder through the pressure sensor 301 so as to adjust the opening time of the two-position two-way valve 302 next time so as to ensure that the gas output volume is consistent each time. Figure 2The oxygen-saving device is that when the two-position two-way valve 302 is opened, the flow sensor 306 will measure the gas flow passing through it, and adjust the opening time of the two-position two-way valve 302 according to the value change of the flow sensor, so as to ensure that the gas output is consistent each time; Figure 3 The oxygen-saving device is the 307 pressure-stabilizing valve, which ensures that the oxygen flow through the pressure-stabilizing valve 307 is consistent. The control panel receives the pressure-stabilizing information of the pressure-stabilizing valve, and only needs to open the two-position two-way valve 302 according to the set opening time to ensure that the output gas volume is consistent each time.

[0076] Example 2

[0077] Embodiment 2 of the present invention provides three types of structures for connecting an oxygen-saving device with an oxygen cylinder through a pipeline: pipeline connection, bayonet connection and threaded connection, which are described below respectively.

[0078] like Figure 4 As shown, it is a schematic structural diagram of an oxygen-saving device 101 and an oxygen cylinder 100 connected via a pipeline according to Embodiment 2 of the present invention. At this time, the oxygen-saving device further includes an air pipe 400.

[0079] When in use, the oxygen cylinder 100 is connected to the oxygen-saving device 101 through the trachea 400, and then connected to the nasal oxygen tube through the oxygen outlet 202 to complete the oxygen output.

[0080] like Figure 5 As shown, it is a schematic diagram of the connection process and state change of the oxygen-saving device 101 of Example 2 of the present invention and the oxygen cylinder bayonet. At this time, the gas source of the oxygen-saving device 101 is the oxygen cylinder 100, and the oxygen outlet of the oxygen cylinder 100 is an oxygen outlet valve that is pressed downward; the oxygen-saving device 101 also includes: a shell for realizing connection with the oxygen cylinder bayonet, a groove arranged around the air inlet, and a sealing silica gel, wherein, after the oxygen cylinder is placed in the shell, the oxygen outlet of the oxygen cylinder and the air inlet of the oxygen-saving device are sealed and the oxygen outlet valve is opened.

[0081] Figure 5 The device comprises: an oxygen cylinder 100, an oxygen-saving device 101, an oxygen outlet 200 of the oxygen cylinder (the oxygen outlet of the oxygen cylinder is a valve for releasing oxygen by pressing downward), and an oxygen outlet 202 of the oxygen-saving device.

[0082] When in use, the oxygen cylinder 100 is tilted and placed into the oxygen-saving device 101 so that the oxygen outlet 200 of the oxygen cylinder is aligned with the air inlet 201 of the oxygen-saving device. The groove around the air inlet 201 is a rough positioning, which is convenient for the oxygen cylinder 100 to be placed in the oxygen-saving device 201. The oxygen outlet of the oxygen-saving device 201 is surrounded by sealing silicone, and the oxygen outlet of the oxygen cylinder 100 is elastically opened downward. When the oxygen cylinder 100 is completely entered into the oxygen-saving device 101, the air circuit is sealed, and the valve of the oxygen cylinder is opened. The oxygen in the oxygen cylinder 100 enters the oxygen-saving device 101, and is connected to the nasal oxygen tube through the oxygen outlet 202 of the oxygen-saving device to supply oxygen to the user.

[0083] like Figure 6 As shown, it is a schematic diagram of the threaded connection process and state change of the oxygen-saving device 101 and the oxygen cylinder 100 of Example 2 of the present invention. At this time, the gas source of the oxygen-saving device is the oxygen cylinder 100, and the oxygen outlet of the oxygen cylinder 100 is an oxygen outlet valve that is pressed downward; the oxygen-saving device 101 also includes: a front shell with threads and a rear shell with a nut for realizing connection with the screw mouth of the oxygen cylinder; the front shell has grooves and sealing silicone arranged around the air inlet 201; wherein, rotating the threads of the rear shell and the front shell presses the oxygen outlet of the oxygen cylinder with the air inlet and opens the oxygen outlet valve of the oxygen cylinder. The groove around the air inlet 201 is a rough positioning to facilitate the oxygen cylinder 100 to be placed in the oxygen-saving device 201.

[0084] Figure 6 The oxygen cylinder 100, the oxygen-saving device 101, the oxygen cylinder oxygen outlet 200 (the oxygen cylinder oxygen outlet is a downward-pressing oxygen outlet valve), the oxygen-saving device oxygen outlet 202, the oxygen-saving device front shell 502 and the oxygen-saving device rear shell 501.

[0085] When in use, the oxygen cylinder 100 is placed in the oxygen-saving device 101, and the oxygen outlet 200 of the oxygen cylinder 100 is aligned with the air inlet 201 of the oxygen-saving device. The oxygen outlet 202 of the oxygen-saving device 201 is surrounded by sealing silicone, and the air outlet nozzle of the oxygen cylinder 100 is elastically opened downward. Then, the threads of the rear shell 501 of the oxygen-saving device and the front shell 502 of the oxygen-saving device are rotated to press the oxygen outlet 200 of the oxygen cylinder and the air inlet of the oxygen-saving device, and the valve of the oxygen cylinder is opened, and the oxygen in the oxygen cylinder 100 enters the oxygen-saving device 101, passes through the oxygen-saving device 101, and the oxygen outlet 202 is connected to the nasal oxygen tube to supply oxygen to the user.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. An oxygen-saving device, characterized in that: include: An air supply pipeline having an air inlet and an oxygen outlet and a first pressure-taking pipeline connected to the oxygen outlet; a throttling unit and a switch unit sequentially arranged on the air supply pipeline, a pressure difference detection unit arranged on the first pressure-taking pipeline; and a control unit communicatively connected to the pressure difference detection unit and the switch unit; The throttling unit is used to control the flow rate of oxygen entering from the air inlet and output it to the switch unit; The switch unit is used to control the on and off of the gas supply pipeline under the control of the control unit; The pressure difference detection unit is used to detect the difference between the atmospheric pressure and the gas pressure in the first pressure-taking pipeline, obtain the pressure difference and send it to the control unit; The control unit is used to determine whether the user inhales based on the pressure difference, and if so, turn on the switch unit; otherwise, turn off the switch unit.

2. The oxygen-saving device according to claim 1, characterized in that: Also includes: A flow stabilizing unit disposed on the gas supply pipeline and located between the throttling unit and the switch unit; The flow stabilization unit is used to detect the flow rate or pressure of the oxygen output from the throttling unit and send the detection result to the control unit; The control unit is specifically used to adjust the opening time based on the received detection result, and when it is judged that the user inhales based on the pressure difference, control the switch unit to open the air supply pipeline according to the adjusted opening time.

3. The oxygen-saving device according to claim 2, characterized in that: The flow stabilizing unit includes: a flow sensor; or a pressure sensor, wherein the pressure sensor is arranged in a second pressure-taking pipeline, and the second pressure-taking pipeline is connected to the air supply pipeline.

4. The oxygen-saving device according to claim 1, characterized in that: Also includes: A flow stabilizing unit disposed on the gas supply pipeline and located between the switch unit and the pressure difference detection unit; The flow stabilization unit is used to detect the flow rate or pressure of oxygen output from the switch unit and send the detection result to the control unit; The control unit is specifically used to adjust the opening time based on the received detection result, and when it is judged that the user inhales based on the pressure difference, control the switch unit to open the air supply pipeline according to the adjusted opening time.

5. The oxygen-saving device according to claim 4, characterized in that: The flow stabilizing unit includes: a flow sensor; or a pressure sensor, wherein the pressure sensor is arranged in a second pressure-taking pipeline, and the second pressure-taking pipeline is connected to the air supply pipeline.

6. The oxygen-saving device according to claim 1, characterized in that: Also includes: A flow stabilizing unit disposed on the gas supply pipeline and located between the throttling unit and the switch unit; The flow stabilizing unit is a pressure stabilizing valve, which is used to stabilize the pressure of the oxygen output from the throttling unit.

7. The oxygen-saving device according to any one of claims 1 to 6, characterized in that: The pressure difference detection unit includes: a pressure difference sensor.

8. The oxygen-saving device according to any one of claims 1 to 6, characterized in that: The switch unit comprises: a two-position two-way valve.

9. The oxygen-saving device according to any one of claims 1 to 6, characterized in that: The gas source of the oxygen-saving device is an oxygen cylinder with an oxygen outlet that is a downward-pressed oxygen outlet valve; The oxygen-saving device also includes: a shell for realizing bayonet connection with the oxygen cylinder, a groove arranged around the air inlet and sealing silica gel, wherein after the oxygen cylinder is placed in the shell, the oxygen outlet of the oxygen cylinder and the air inlet of the oxygen-saving device are sealed and the oxygen outlet valve is opened.

10. The oxygen-saving device according to any one of claims 1 to 6, characterized in that: The gas source of the oxygen-saving device is an oxygen cylinder with an oxygen outlet that is a downward-pressed oxygen outlet valve; The oxygen-saving device also includes: a front shell with threads and a rear shell with a nut for connecting with the threaded mouth of the oxygen cylinder; the front shell has grooves and sealing silicone arranged around the air inlet inside; wherein, by rotating the threads of the rear shell and the front shell, the oxygen outlet and the air inlet of the oxygen cylinder are pressed tightly and the oxygen outlet valve of the oxygen cylinder is opened.

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