Instrument for supplying oxygen through nose

Abstract

The invention discloses a nasal oxygen supply apparatus, comprising: a cylinder, oxygen supply tubes attached to two ends of the cylinder and communicated with an inner cavity of the cylinder; the nasal tube is used for being inserted into the nostrils of the patient, so that the oxygen provided by the oxygen supply tube enters the inner cavity and then is supplied into the nostrils of the patient through the nasal tube; the exhalation valve allows gas exhaled from the nostrils of the patient to flow to the outside and limits outside air from entering the inner cavity when the patient inhales; the throttle valve is used for enabling the pressure of the oxygen in the downstream inner cavity to be smaller than the pressure of the oxygen in the upstream inner cavity; the valve structure comprises a valve cavity and a valve component; the two ends of the valve cavity communicate with outside air and the inner cavity correspondingly, and the valve component is arranged in the valve cavity and used for controlling opening and closing of the valve cavity. When the pressure in the oxygen supply pipe is larger than the preset pressure, the valve component generates a first action to close the valve cavity, and when the pressure in the oxygen supply pipe is smaller than the preset pressure, the valve component generates a second action to open the valve cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a nasal oxygen supply device. Background Art

[0002] In the prior art, a nasal oxygen supply device generally comprises: a barrel having an inner cavity, two nasal tubes radially formed on the barrel and connected to the inner cavity, an oxygen supply tube connected to both ends of the barrel for supplying oxygen to the inner cavity of the barrel, the oxygen supply tube being connected to an oxygen source and controlled to open and close by a solenoid valve, the oxygen provided by the oxygen supply tube sequentially entering the patient's nasal cavity through the inner cavity of the barrel and the nasal tubes, thereby satisfying the patient's inhalation, and an exhalation valve is also installed on the barrel, the exhalation valve being a check valve, which allows the nostrils to exhale gas but prevents external air from being inhaled by the patient through the exhalation valve, thereby satisfying the requirement of inhaling only using the oxygen supply tube.

[0003] In order to prevent the patient from being unable to breathe due to the interruption of oxygen supply from the oxygen supply tube due to certain reasons (for example, the oxygen supply tube is bent and the oxygen passage is cut off, for example, the oxygen in the oxygen source is exhausted, for example, the solenoid valve controlling the on and off of the oxygen supply tube fails), in the prior art, an electrically controlled safety valve and a sensor extending into the inner cavity of the cylinder for detecting the oxygen content in the inner cavity are attached to the cylinder body, and the solenoid valve is used to control the opening and closing of the installed valve based on the oxygen content detected by the sensor. Specifically, if the oxygen content detected by the sensor is low, a control signal is sent to the solenoid module of the safety valve, and the solenoid module controls the safety valve to open, so that the inner cavity of the cylinder is connected to the outside to allow the patient to breathe through the safety valve.

[0004] However, adding an electrically controlled safety valve and sensor to the oxygen supply device not only requires the addition of a power supply module to the device, but also increases the size of the device, which does not meet the requirement for lightweight design of nasal devices and increases the cost. Summary of the invention

[0005] In view of the above-mentioned technical problems existing in the prior art, an embodiment of the present invention provides a nasal oxygen supply device.

[0006] In order to solve the above technical problems, the technical solution adopted in the embodiments of the present invention is: A nasal oxygen supply device, comprising: A cylinder body, which defines an inner cavity extending axially therethrough, and an oxygen supply tube for providing oxygen is attached to both ends of the cylinder body and communicates with the inner cavity; The nasal tubes include two nasal tubes, which are arranged in parallel and drawn out from the wall of the cylinder and extend radially, and are both connected to the inner cavity; the two nasal tubes are used to be inserted into two nostrils of the patient respectively, so that the oxygen provided by the oxygen supply tube enters the inner cavity and is supplied to the nostrils of the patient through the nasal tube; An exhalation valve, which is attached to the barrel, the exhalation valve allows the gas exhaled from the patient's nostrils to flow to the outside through the inner cavity and restricts the outside air from entering the inner cavity when the patient inhales; a throttle valve disposed transversely in the inner cavity for throttling the oxygen so that the pressure of the oxygen in the downstream inner cavity is lower than the pressure of the oxygen in the upstream inner cavity; A valve structure, comprising a valve cavity and a valve component; two ends of the valve cavity are respectively connected to the outside air and the inner cavity, and the valve component is arranged in the valve cavity to control the on-off of the valve cavity; the valve component acts based on the pressure change in the oxygen supply pipe to control the on-off of the valve cavity: when the pressure in the oxygen supply pipe is greater than the preset pressure, the valve component generates a first action to close the valve cavity, and when the pressure in the oxygen supply pipe is less than the preset pressure, the valve component generates a second action opposite to the first action to open the valve cavity and allow the patient to inhale from the outside through the valve cavity.

[0007] Preferably, the valve component is configured as an airbag with an inflation interface, and an inflation channel is led out from the upstream inner cavity, and the distal end of the inflation channel is connected to the inflation interface of the airbag. When the pressure in the oxygen supply tube is greater than a preset pressure, the pressure of the oxygen provided by the inflation channel causes the airbag to expand to block the valve cavity, and when the pressure in the oxygen supply tube is less than the preset pressure, the airbag contracts to open the valve cavity.

[0008] Preferably, the valve component is configured as a columnar valve core, and the valve structure further includes a guide cavity, a pilot core, a biasing component and a magnetic assembly; wherein: a pilot flow channel is led out from the upstream inner cavity, the distal end of the pilot flow channel is communicated with the inner end of the guide cavity, and the pilot core is disposed in the guide cavity and can slide along the guide cavity; The biasing member is disposed in the guide cavity to apply elastic force toward the inner end of the guide cavity; The magnet assembly comprises a first magnetic component and a second magnetic component respectively arranged on the pilot core and the cylindrical valve core, and the magnetic attraction between the first magnetic component and the second magnetic component causes the cylindrical valve core to move synchronously with the pilot valve core; wherein: When the pressure in the oxygen supply pipe is greater than a preset pressure, the pressure of the oxygen provided by the pilot flow channel overcomes the biasing component and causes the pilot core to slide to the outer end of the guide cavity, thereby driving the columnar valve core to slide to the outer end of the valve cavity and close the valve cavity; and when the pressure in the oxygen supply pipe is less than the preset pressure, the biasing component is reset and causes the pilot core to slide to the inner end of the guide cavity, thereby driving the columnar valve core to slide to the inner end of the valve cavity and open the valve cavity.

[0009] Preferably, the outer end of the valve cavity is configured with a conical opening; the outer end of the columnar valve core is configured with a conical surface, and a plurality of air guide grooves extending axially and arranged circumferentially are provided on the outer peripheral surface of the columnar valve core, the air guide grooves are connected with the conical surface, and the axial section of the conical surface that is not connected with the air guide grooves is used to block the conical opening.

[0010] Preferably, the first magnetic component is a magnetic ring sleeved outside the pilot core, and the second magnetic component is a plurality of magnetic sheets attached to the outer circumferential surface of the pilot core between each two adjacent air guide grooves.

[0011] Preferably, a duckbill valve is provided in the inner cavity between the throttle valve and the nasal tube. When the oxygen supply tube supplies oxygen, the oxygen forces the duckbill valve to open for the patient to inhale oxygen. When the patient exhales, the duckbill valve automatically closes.

[0012] Preferably, the throttle valve comprises a disc body and a plurality of throttle holes which are opened on the disc body and axially penetrate the disc body, and the duckbill valve is attached to the throttle valve.

[0013] Preferably, a strip-shaped attachment component is installed on the front side of the cylinder, and the valve structure and the exhalation valve are configured in the attachment component.

[0014] Preferably, the exhalation valve is a plate-type valve, and a cover body is buckled on the front side of the attachment component, and the cover body is used to allow the gas exhaled through the exhalation valve to be discharged downward.

[0015] Preferably, the valve structure and the throttle valve each include two, and the two valve structures and the two throttle valves are symmetrically arranged.

[0016] Compared with the prior art, the beneficial effects of the nasal oxygen supply device provided by the embodiment of the present invention are: 1. The valve structure in the nasal oxygen supply device provided by the present invention controls the connection and disconnection between the nasal tube and the external gas based on the pressure of oxygen in the oxygen supply tube to prevent the patient from being unable to inhale when the oxygen supply system cannot work normally. The valve structure uses the pressure change of oxygen to control the mechanical action of the valve component to control the connection and disconnection of the valve cavity, thereby avoiding the use of an electrically controlled installation valve and a sensor to control the connection and disconnection of the valve cavity. Therefore, the device does not need to be attached with a power supply module, the size of the device can be configured to be smaller, and the required cost is also lower.

[0017] 2. The rated oxygen supply pressure of the oxygen supply pipe is increased by configuring a throttle valve in the inner cavity of the cylinder, thereby reducing the influence of the resistance of related components (such as the inner wall of the oxygen supply pipe) on the oxygen flow rate on the one hand, and making the oxygen pressure change sufficient to drive the valve component to produce a mechanical action of opening and closing the valve cavity on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1A schematic diagram of the three-dimensional appearance of a nasal oxygen supply device equipped with a valve structure of the first specific structural form provided in an embodiment of the present invention.

[0019] Figure 2 A perspective cross-sectional view of a nasal oxygen delivery apparatus provided for an embodiment of the present invention (with the patient in the inspiration phase).

[0020] Figure 3 A perspective cross-sectional view of a nasal oxygen delivery apparatus provided for an embodiment of the present invention (with the patient in the exhalation phase).

[0021] Figure 4 A three-dimensional cross-sectional view of a nasal oxygen supply device equipped with a valve structure of a first specific structural form provided in an embodiment of the present invention (the pressure of oxygen in the oxygen supply tube is greater than a preset pressure).

[0022] Figure 5 A three-dimensional cross-sectional view of a nasal oxygen supply device equipped with a valve structure of a first specific structural form provided for an embodiment of the present invention (the pressure of oxygen in the oxygen supply tube is less than a preset pressure).

[0023] Figure 6 A schematic diagram of the three-dimensional appearance structure of a nasal oxygen supply device equipped with a valve structure of the second specific structural form provided in an embodiment of the present invention.

[0024] Figure 7 A three-dimensional cross-sectional view of a nasal oxygen supply device equipped with a valve structure of a second specific structural form provided in an embodiment of the present invention (the pressure of oxygen in the oxygen supply tube is greater than a preset pressure).

[0025] Figure 8 for Figure 1 An enlarged view of detail A.

[0026] Fig. 9 It is a schematic structural diagram of the valve components in the valve structure of the second specific structural form.

[0027] Fig.10 A three-dimensional cross-sectional view of a nasal oxygen supply device equipped with a valve structure of a second specific structural form provided in an embodiment of the present invention (the pressure of oxygen in the oxygen supply tube is greater than a preset pressure).

[0028] In the figure: 10-cylinder body; 11-inner cavity; 20-nasal tube; 30-attached parts; 40-exhalation valve; 41-silicone sheet; 42-air outlet groove; 43-cover body; 44-exhaust groove; 50-throttle valve; 51-disk body; 52-throttle hole; 60-duckbill valve.

[0029] 70-valve structure; 71-valve cavity; 72-valve component; 721-inflating interface; 73-inflating flow channel.

[0030] 70'-valve structure; 71'-valve cavity; 711'-recessed opening; 72'-valve component; 721'-conical surface; 722'-air guide groove; 73'-pilot flow channel; 74'-pilot core; 75'-guide cavity; 751'-balance air hole; 76'-spring; 771'-first magnetic component; 772'-second magnetic component. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figures 1 to 10 As shown, an embodiment of the present invention discloses a nasal oxygen supply device, which includes: a cylinder 10, a nasal tube 20, an attachment component 30, an exhalation valve 40, a throttle valve 50, a duckbill valve 60 and valve structures 70, 70'.

[0033] like Figures 2 to 4 As shown, the cylinder wall of the cylinder 10 defines an axially through inner cavity 11, and the oxygen supply tube (not shown) of the oxygen supply system is divided into two paths extending from the back side of the patient's head to both sides of the nose and connected to the two ends of the cylinder 10 and communicated with the inner cavity 11. The nasal tubes 20 include two, the two nasal tubes 20 are arranged in parallel and radially extend from the cylinder wall of the back side of the cylinder 10, the two nasal tubes 20 are both communicated with the inner cavity 11 of the cylinder 10, and the two nasal tubes 20 are used to be inserted into the two nostrils of the patient's nose respectively. During the patient's inhalation stage, the oxygen supply tube provides positive pressure oxygen from both ends of the cylinder 10 to the inner cavity 11, and the provided oxygen is supplied to the patient's nostrils through the two nasal tubes 20 to provide the patient with inhalation in a positive pressure oxygen supply manner.

[0034] The throttle valve 50 includes two throttle valves 50, which are both disposed in the inner cavity 11 and arranged symmetrically. The two throttle valves 50 are respectively located outside the axial position of the two nasal tubes 20, so that the oxygen from the two ends of the barrel 10 enters the nostrils after passing through the throttle valves 50. The throttle valve 50 throttles the oxygen passing through the inner cavity 11, so that the pressure of the oxygen located on the end side of the barrel 10 is greater than the pressure of the oxygen located on the side of the nasal tube 20, that is, the pressure of the oxygen upstream of the inner cavity 11 is greater than the pressure of the oxygen downstream of the inner cavity 11. The throttle valve 50 is not intended to The oxygen flow rate entering the nasal tube 20 is not reduced, but the upstream oxygen pressure is increased under the premise of maintaining the required downstream oxygen pressure and flow rate by increasing the upstream oxygen pressure. The effect of increasing the upstream oxygen pressure is: on the one hand, the oxygen supply system can obtain a larger rated pressure range, that is, even if the pressure fluctuation generated by the oxygen supply system is large, the flow rate of oxygen supplied to the nostrils will not change too much, thereby reducing the influence of resistance factors on the oxygen supply flow rate; on the other hand, it is beneficial for the upstream oxygen pressure to be used as a control pressure, and the specific effect is described below. Preferably, the throttle valve 50 is configured as a disc structure, specifically, the throttle valve 50 includes a disc body 51 placed horizontally in the cylindrical inner cavity 11, and the disc body 51 is provided with a plurality of throttle holes 52 that pass axially, and the throttle holes 52 pass through the disc body 51 in a spiral manner, and oxygen passes through the plurality of throttle holes 52.

[0035] The duckbill valve 60 is disposed in the inner cavity 11 between the nasal tube 20 and the throttle valve 50. The duckbill valve 60 has an open portion and a mouth portion. The direction of the mouth portion is consistent with the flow direction of oxygen. Preferably, the open portion of the duckbill valve 60 is attached to the edge of the disk 51 of the throttle valve 50. During the patient's inhalation phase, oxygen opens the mouth portion of the duckbill valve 60 and flows through the mouth portion to enter the nasal tube 20. During the patient's inhalation phase, the mouth portion of the duckbill valve 60 is automatically closed, thereby preventing the patient's exhaled gas from flowing back through the duckbill valve 60 into the inner cavity 11 upstream.

[0036] The attachment component 30 is configured in a rectangular strip shape, and the attachment component 30 is attached to the front side of the cylinder 10. The exhalation valve 40 is configured in the attachment component 30. Specifically, a hollow portion is provided on the cylinder wall on the front side of the cylinder 10. The exhalation valve 40 includes an air outlet groove 42 provided on the attachment component 30 and extending from the rear side to the front side and divided into two parts by a middle beam, and a silicone sheet 41 covering the front end of the air outlet groove 42 and fixed to the beam in the middle. Figure 3 As shown, during the patient's exhalation phase, the duckbill valve 60 is closed, and the exhaled gas deforms the silicone sheet 41 to open the gas outlet slot 42, so that the exhaled gas is discharged to the outside through the gas outlet slot 42. The deformation stiffness of the silicone sheet 41 should not be too small to avoid the patient's inhalation phase (i.e., oxygen supply phase, such as Figure 3(as shown) the silicone sheet 41 is deformed, causing serious leakage of oxygen through the exhalation valve 40. In some preferred structures, a cover body 51 is buckled on the front side of the attachment component 30, and an exhaust groove 44 is opened at the bottom of the cover body 51. The exhaust groove 44 faces downward and is connected to the exhaust groove 42. In this way, the gas exhaled by the patient is discharged downward under the guidance of the exhaust groove 44 to avoid being covered or blocked by external objects as much as possible.

[0037] The valve structures 70, 70' are arranged on the attachment part 30, and the valve structures 70, 70' are used as safety valves, and their functions are: Figure 4 and Figure 7 As shown, if the pressure of oxygen in the upstream inner cavity 11 (in fact, the pressure of oxygen in the upstream inner cavity 11 is substantially equal to the pressure at the port of the supply pipe) is greater than the preset pressure, the valve structures 70, 70' close the passage connecting the downstream inner cavity 11 with the outside, as shown in FIG. Figure 5 and Fig.10 As shown, if the pressure of oxygen in the upstream inner cavity 11 is less than the preset pressure, the valve structures 70, 70' open the passage connecting the downstream inner cavity 11 with the outside world. The preset pressure can be set based on the rated pressure range of the oxygen supply system. Specifically, for example, the preset pressure can be set by the following method: the pressure less than the lower limit of the rated pressure is used as the preset pressure. Therefore, if the actual pressure of oxygen in the upstream inner cavity 11 is less than the preset pressure, it means that the oxygen supply system is difficult to maintain the minimum oxygen supply parameters, and the patient needs to use the outside air to participate in the oxygen supply. The reasons why the oxygen supply system is difficult to maintain the minimum oxygen supply parameters may be: for example, insufficient oxygen source, failure of the electronic control component (system), and hard bends in the oxygen supply tube.

[0038] The valve structures 70, 70' have two valve structures, which are symmetrically arranged and correspond to the two throttle valves 50 respectively. The valve structures 70, 70' include valve cavities 71, 71' and valve components 72, 72'; the valve cavities 71, 71' are opened at positions close to the ends of the attachment components 30, and the valve cavities 71, 71' extend toward the front and rear sides of the attachment components 30. The outer ends of the valve cavities 71, 71' pass through the front side of the attachment components 30 and communicate with the outside, and the inner ends of the valve cavities 71, 71' pass through the rear side of the attachment components 30 and communicate with the downstream inner cavity 11 through the hollow portion on the front side of the cylinder 10. The valve components 72, 72' are arranged in the valve cavities 71, 71', and the valve components 72, 72' are actuated based on the change in the pressure of the oxygen in the upstream inner cavity 11, so that: Figure 4 and Figure 7 As shown in FIG. 1 , when the pressure of the oxygen in the upstream inner cavity 11 is greater than the preset pressure, it indicates that the pressure and flow of the oxygen provided by the oxygen supply tube are sufficient, and the valve components 72, 72' perform a first action to close the valve cavities 71, 71', thereby limiting the patient from inhaling through the valve cavities 71, 71' and using the oxygen supply tube to inhale. Figure 5and Fig.10 As shown, when the pressure of oxygen in the upstream inner cavity 11 is less than the preset pressure, it means that the pressure and flow of oxygen provided by the oxygen supply tube are insufficient, and the valve components 72, 72' perform a second action opposite to the first action to open the valve cavities 71, 71', thereby allowing the patient to inhale from the outside through the valve cavity 71' to avoid the device inhibiting inhalation.

[0039] The present invention provides two valve structures.

[0040] A valve structure 70 of a first structure.

[0041] like Figures 1 to 5 As shown, in the valve structure 70, the valve component 72 is configured as an airbag with an inflation interface 721, and the airbag can be made of thin and elastic silicone, and an inflation channel 73 is led out from the upstream inner cavity 11, and the end of the inflation channel 73 is connected to the inflation interface 721 of the airbag. Figure 4 As shown, when the pressure of oxygen in the upstream inner cavity 11 is greater than the preset pressure, the oxygen inflates the airbag to expand the airbag (the first action is expansion) to the extent of blocking the valve cavity 71, thereby closing the valve cavity 71, as shown in FIG. Figure 5 As shown, when the pressure of oxygen in the upstream inner cavity 11 is less than the preset pressure, the airbag contracts (the second action is contraction) due to insufficient oxygen pressure to the extent that the valve cavity 71 is at least partially opened, thereby allowing the patient to inhale from the outside through the valve cavity 71.

[0042] A second valve structure 70' is shown.

[0043] like Figures 6 to 10 As shown, in the present valve structure 70', the valve component 72' is configured as a columnar valve core made of a lightweight material, and the valve cavity 71' is configured as a columnar cavity extending in a straight line. The outer end of the valve cavity 71' is connected to the outside, and the inner end of the valve cavity 71' is connected to the downstream inner cavity 11 through the hollow portion on the front side of the cylinder 10. The valve structure 70' also includes a guide cavity 75', a pilot core 74', a spring 76' (as a biasing component) and a magnetic assembly; the guide cavity 75' is arranged in parallel with the valve cavity 71', and a pilot flow channel 73' is led out from the upstream inner cavity 11, and the end of the pilot flow channel 73' is connected to the inner end of the guide cavity 75', and the outer end of the guide cavity 75' has a balancing air hole 751' connected to the outside, the pilot core 74' is arranged in the guide cavity 75' and can slide along the guide cavity 75', and the spring 76' is arranged in the guide cavity 75' and elastically pushes the pilot core 74' toward the inner end of the guide cavity 75'.

[0044] The outer end of the valve cavity 71' is provided with a constriction 711', and the radial dimension of the constriction 711' is smaller than the radial dimension of the main shaft section of the valve cavity 71'. The outer end of the valve component 72' is provided with a conical surface 721'. The outer peripheral surface of the valve component 72' is provided with a plurality of air guide grooves 722' which axially penetrate the two ends of the valve component 72' and are arranged circumferentially. The outer ends of the air guide grooves 722' are connected with the bottom shaft section of the conical surface 721', while the top shaft section of the conical surface 721' is still a complete and smooth conical surface 721'.

[0045] The magnetic assembly includes a first magnetic component 771' and a second magnetic component 772'. The first magnetic component 771' is arranged on the pilot core 74', and the second magnetic component 772' is arranged on the valve component 72', so that the magnetic pole arrangement of the first magnetic component 771' and the second magnetic component 772' satisfies the formation of magnetic attraction between the first magnetic component 771' and the second magnetic component 772'. In this way, when the pilot core 74' slides axially along the guide cavity 75', the valve component 72' moves synchronously in the same direction as the pilot core 74' by means of magnetic attraction.

[0046] Based on the above, we can know that: like Figure 7 As shown, when the pressure of oxygen in the upstream inner cavity 11 is greater than the preset pressure, the pressure of oxygen drawn from the pilot flow channel 73' overcomes the elastic force of the spring 76' and drives the pilot core 74' to move to the outer end of the guide cavity 75', and the valve component 72' moves synchronously with the pilot core 74' to the outer end of the valve cavity 71' (the first action is that the valve component 72' moves from the inner end to the outer end of the valve cavity 71'). At this time, the conical surface 721' of the top shaft section of the outer end of the valve component 72' blocks the constriction 711', thereby closing the valve cavity 71', as shown in FIG. Fig.10 As shown, when the pressure of oxygen in the upstream inner cavity 11 is less than the preset pressure, the spring 76' overcomes the pressure of oxygen and drives the pilot core 74' to move to the side of the inner end of the guide cavity 75', and the valve component 72' moves with the pilot core 74' to the side of the inner end of the valve cavity 71' (the second action is that the valve component 72' moves from the outer end to the inner end of the valve cavity 71'). At this time, the constriction 711' at the outer end of the valve cavity 71' is opened, and the outside air can enter the downstream inner cavity 11 through the constriction 711' and the multiple air guide grooves 722' arranged circumferentially on the valve component 72', that is, the valve cavity 71' is opened.

[0047] In some preferred structures, the guide core 74' is made of lightweight material, the first magnetic component 771' is a magnetic ring, which is sleeved outside the guide core 74' and fixed to the guide core 74', and the second magnetic component 772' is a plurality of magnetic sheets attached to the outer peripheral surface of the guide core 74' between each two adjacent air guide grooves 722'.

[0048] The advantages of this structure compared to the first structure are: the valve component controls the opening and closing of the valve cavity reliably, the service life of related components is long, the valve component is more sensitive, and it is easy to match the preset pressure with the action of the valve component. The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A nasal oxygen supply device, characterized in that: include: A cylinder body, which defines an inner cavity extending axially therethrough, and an oxygen supply tube for providing oxygen is attached to both ends of the cylinder body and communicates with the inner cavity; The nasal tubes include two nasal tubes, which are arranged in parallel and drawn out from the wall of the cylinder and extend radially, and are both connected to the inner cavity; the two nasal tubes are used to be inserted into two nostrils of the patient respectively, so that the oxygen provided by the oxygen supply tube enters the inner cavity and is supplied to the nostrils of the patient through the nasal tube; An exhalation valve, which is attached to the barrel, the exhalation valve allows the gas exhaled from the patient's nostrils to flow to the outside through the inner cavity and restricts the outside air from entering the inner cavity when the patient inhales; a throttle valve disposed transversely in the inner cavity for throttling the oxygen so that the pressure of the oxygen in the downstream inner cavity is lower than the pressure of the oxygen in the upstream inner cavity; A valve structure, comprising a valve cavity and a valve component; two ends of the valve cavity are respectively connected to the outside air and the inner cavity, and the valve component is arranged in the valve cavity to control the on-off of the valve cavity; the valve component acts based on the pressure change in the oxygen supply pipe to control the on-off of the valve cavity: when the pressure in the oxygen supply pipe is greater than the preset pressure, the valve component generates a first action to close the valve cavity, and when the pressure in the oxygen supply pipe is less than the preset pressure, the valve component generates a second action opposite to the first action to open the valve cavity and allow the patient to inhale from the outside through the valve cavity.

2. The nasal oxygen supply device according to claim 1, characterized in that: The valve component is configured as an airbag with an inflation interface, and an inflation channel is led out from the upstream inner cavity. The distal end of the inflation channel is connected to the inflation interface of the airbag. When the pressure in the oxygen supply tube is greater than the preset pressure, the pressure of the oxygen provided by the inflation channel causes the airbag to expand to block the valve cavity, and when the pressure in the oxygen supply tube is less than the preset pressure, the airbag contracts to open the valve cavity.

3. The nasal oxygen supply device according to claim 1, characterized in that: The valve component is configured as a columnar valve core, and the valve structure further includes a guide cavity, a pilot core, a biasing component, and a magnetic assembly; wherein: a pilot flow channel is led out from the upstream inner cavity, the distal end of the pilot flow channel is communicated with the inner end of the guide cavity, and the pilot core is disposed in the guide cavity and can slide along the guide cavity; The biasing member is disposed in the guide cavity to apply elastic force toward the inner end of the guide cavity; The magnet assembly comprises a first magnetic component and a second magnetic component respectively arranged on the pilot core and the cylindrical valve core, and the magnetic attraction between the first magnetic component and the second magnetic component causes the cylindrical valve core to move synchronously with the pilot valve core; wherein: When the pressure in the oxygen supply pipe is greater than a preset pressure, the pressure of the oxygen provided by the pilot flow channel overcomes the biasing component and causes the pilot core to slide to the outer end of the guide cavity, thereby driving the columnar valve core to slide to the outer end of the valve cavity and close the valve cavity; and when the pressure in the oxygen supply pipe is less than the preset pressure, the biasing component is reset and causes the pilot core to slide to the inner end of the guide cavity, thereby driving the columnar valve core to slide to the inner end of the valve cavity and open the valve cavity.

4. The nasal oxygen supply device according to claim 3, characterized in that: The outer end of the valve cavity is configured with a conical surface; the outer end of the columnar valve core is configured with a conical surface, and a plurality of air guide grooves extending axially and arranged circumferentially are provided on the outer peripheral surface of the columnar valve core, the air guide grooves are connected with the conical surface, and the axial section of the conical surface that is not connected with the air guide grooves is used to block the conical surface.

5. The nasal oxygen supply device according to claim 4, characterized in that: The first magnetic component is a magnetic ring sleeved outside the pilot core, and the second magnetic component is a plurality of magnetic sheets attached to the outer peripheral surface of the pilot core between each two adjacent air guide grooves.

6. The nasal oxygen supply device according to claim 1, characterized in that: A duckbill valve is arranged in the inner cavity between the throttle valve and the nasal tube. When the oxygen supply tube supplies oxygen, the oxygen forces the duckbill valve to open for the patient to inhale oxygen. When the patient exhales, the duckbill valve closes automatically.

7. The nasal oxygen supply device according to claim 6, characterized in that: The throttle valve comprises a disc body and a plurality of throttle holes which are opened on the disc body and axially penetrate the disc body, and the duckbill valve is attached to the throttle valve.

8. The nasal oxygen supply device according to claim 1, characterized in that: A strip-shaped attachment component is installed on the front side of the cylinder, and the valve structure and the exhalation valve are configured in the attachment component.

9. The nasal oxygen supply device according to claim 8, characterized in that: The exhalation valve is a plate-type valve, and a cover body is buckled on the front side of the attachment component. The cover body is used to allow the gas exhaled through the exhalation valve to be discharged downward.

10. The nasal oxygen supply device according to claim 1, characterized in that: The valve structure and the throttle valve each include two valve structures and the two throttle valves are symmetrically arranged.

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