Anti-backflow oxygen humidifying device

Abstract

The anti-backflow oxygen humidifying device comprises a main water storage bottle, an air inlet pipe, an air outlet pipe and an anti-backflow device, humidifying liquid is stored in the main water storage bottle, and an air outlet is formed in the top of the main water storage bottle; the air inlet pipe comprises an air pipe and an oxygen pipe, and the air pipe and the oxygen pipe provide air and oxygen for the main water storage bottle respectively; the air outlet pipe communicates with the air outlet; the backflow preventing device comprises a first communicating pipe, a first one-way valve, a first temporary storage bottle and a floating plug, the first temporary storage bottle is connected with the main water storage bottle through the first communicating pipe, the first one-way valve is arranged in the first communicating pipe, when preset pressure is reached, the first one-way valve is communicated towards the main water storage bottle, and the floating plug floats in the main water storage bottle; when the liquid level rises to the top of the main water storage bottle, the floating plug can block the air outlet pipe. According to the anti-backflow oxygen humidifying device, the inhalation risk of a patient caused by backflow of humidifying liquid can be effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of an anti-backflow oxygen humidification device. Background Art

[0002] In medical oxygen supply systems, oxygen humidification devices are critical for preventing dryness of the patient's respiratory mucosa. Traditional oxygen humidification bottles typically consist of a water storage bottle, an inlet pipe, and an outlet pipe. Oxygen is introduced into the bottom of the water storage bottle through the inlet pipe, humidified with a humidifying fluid (such as sterile distilled water), and then discharged through the outlet pipe. However, existing technologies have the following drawbacks: 1. Liquid backflow risk: When the oxygen supply pressure drops suddenly or the system shuts down, the humidifying liquid in the water storage bottle can easily flow back through the outlet pipe, contaminating the gas source equipment and even causing the patient to inhale the risk. The existing one-way valve anti-backflow solution has a delayed response and cannot cope with sudden pressure changes.

[0003] 2. Insufficient liquid level control: When the liquid level drops, manual rehydration is required, and interruption of the operation affects the continuity of treatment; when the liquid level is too high, there is a lack of automatic blocking mechanism, which can easily cause liquid to enter the oxygen supply pipeline.

[0004] 3. Uneven gas mixing: The mixing of oxygen and air relies on simple bubble diffusion, and the mixing efficiency is low, which affects the humidification uniformity and oxygen concentration stability. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide an anti-backflow oxygen humidification device, which can effectively prevent the humidification liquid from flowing back and causing the risk of inhalation by the patient.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solution: an oxygen humidification device for preventing backflow, comprising: A main water storage bottle, wherein the main water storage bottle stores humidifying liquid and the top of the main water storage bottle is provided with an air outlet; An air intake pipe, comprising an air pipe and an oxygen pipe, wherein the air pipe and the oxygen pipe respectively provide air and oxygen to the main water storage bottle; an air outlet pipe, connected to the air outlet; and The backflow prevention device includes a first connecting pipe, a first one-way valve, a first temporary storage bottle and a float. The first temporary storage bottle is connected to the main water storage bottle through the first connecting pipe. The first one-way valve is arranged in the first connecting pipe. When a predetermined pressure is reached, the first one-way valve is connected in the direction of the main water storage bottle. The float floats on the main water storage bottle. When the liquid level rises to the top of the main water storage bottle, the float can block the air outlet pipe.

[0007] Furthermore, the float plug includes a floating block and a counterweight ball, the counterweight ball is fixed at the bottom of the floating block, the top of the floating block is a cone with an outer diameter gradually decreasing from bottom to top, and the inner top of the main water storage bottle is a cone with a diameter gradually decreasing. When the liquid level rises to the top, the cone can be inserted into the air outlet pipe to block the air outlet pipe.

[0008] Furthermore, the first one-way valve includes an elastic support member and a sealing plate, the elastic support member is supported between the inner wall of the first connecting pipe and the sealing plate, and under the pressure of the elastic support member, the sealing plate covers the end of the first connecting pipe to seal the first connecting pipe.

[0009] Furthermore, it also includes an automatic liquid replenishing system, which is connected to the main water storage bottle. When the liquid level in the main water storage bottle drops, the automatic liquid replenishing system can automatically replenish the humidifying liquid into the main water storage bottle so that the liquid level in the main water storage bottle remains unchanged.

[0010] Furthermore, the automatic rehydration system includes a float, a guide rod, a guide block, a rehydration water storage bottle, a rehydration tube, a pressure block and a second one-way valve; The float floats in the main water storage bottle, the guide rod is arranged on the float, the guide block is arranged in the main water storage bottle, a vertical downward guide hole is opened on the guide block, the guide rod can be inserted in the guide hole by sliding up and down, the fluid replacement water storage bottle is connected to the main water storage bottle, the second one-way valve is arranged between the fluid replacement water storage bottle and the main water storage bottle, the switch of the second one-way valve is a pressure switch, and is arranged on the upper surface of the guide block and is located at a preset height, the pressing block is arranged on the guide rod and is located above the guide block, when the pressing block is pressed on the switch of the second one-way valve by gravity, the second one-way valve is in an open state, the second one-way valve can be opened toward the main water storage bottle, and when the pressure of the switch of the second one-way valve is released, the second one-way valve is in a closed state.

[0011] Furthermore, it also includes a gas mixing device, through which the air pipe and the oxygen pipe are connected to the main water storage bottle, and is used to mix the air and oxygen input from the air pipe and the oxygen pipe and then deliver them to the main water storage bottle.

[0012] Furthermore, the gas mixing device includes a mixing chamber, a nozzle and an air pump. There are two nozzles, which are arranged in the mixing chamber and opposite to each other. The air pipe and the oxygen pipe are respectively connected to the two nozzles. The air pump is arranged on the opposite side of the two nozzles and is used to draw the mixed gas formed by the mixed oxygen and air into the main water storage bottle.

[0013] Furthermore, the gas mixing device also includes a cylindrical spiral stirring blade and a rotating power source for driving the spiral stirring blade to rotate, the inner cavity of the mixing chamber is cylindrical, the spiral stirring blade is arranged in the mixing chamber and is coaxial with the inner cavity of the mixing chamber, and the outer wall of the spiral stirring blade is aligned with the inner wall of the mixing chamber, the length of the spiral stirring blade is less than the height of the inner cavity of the mixing chamber, the rotating power source is connected to the spiral stirring blade, and is used to drive the spiral stirring blade to rotate, and the two nozzles are respectively located on both sides of the spiral stirring blade. Beneficial effects of the present invention: When the aforementioned anti-backflow oxygen humidifier is in use, air and oxygen enter the main water storage bottle through the air and oxygen tubes. When the air pressure in the main water storage bottle suddenly rises (e.g., due to a patient's exhaled backflow or the influx of a large amount of air and oxygen), the liquid level in the main water storage bottle rises rapidly, and the float floats with the liquid. If the liquid level rises abnormally to the top, the float blocks the outlet pipe, preventing liquid from entering the patient's respiratory tract. Simultaneously, after the outlet pipe is blocked, the pressure in the main water storage bottle rises again instantaneously. When it reaches the preset pressure, the air pressure pushes the liquid toward the first connecting pipe, forcing the first one-way valve to open, temporarily storing the liquid in the first temporary storage bottle to prevent backflow to the gas source.

[0014] The dual anti-backflow mechanism of the one-way valve drainage combined with the float plug physical blocking can effectively prevent the humidification liquid from flowing back into the gas source or the patient, reducing cross contamination and lowering the risk of patient inhalation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0016] Figure 1 A schematic diagram of an oxygen humidification device with backflow prevention provided by one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of a backflow prevention oxygen humidification device in which the float plug is in a blocked state and the sealing plate is in an open state; Figure 3 for Figure 1 A partial schematic diagram of the middle part; Figure 4 for Figure 1 Partial schematic diagram at point B in the middle; Reference numerals: 100, main water storage bottle; 200, air inlet pipe; 210, air pipe; 220, oxygen pipe; 300, air outlet pipe; 400, backflow prevention device; 410, first connecting pipe; 420, first one-way valve; 421, elastic support member; 422, sealing plate; 430, first temporary storage bottle; 440, float; 441, floating block; 442, weighted ball; 500, automatic liquid replenishment system; 510, floating ball; 520, guide rod; 530, guide block; 540, liquid replenishment water storage bottle; 550, pressing block; 560, second one-way valve; 570, switch; 600, gas mixing device; 610, mixing chamber; 620, nozzle; 630, vacuum pump; 640, spiral stirring blade. DETAILED DESCRIPTION

[0017] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] See Figures 1 to 4 The present invention provides an oxygen humidification device with backflow prevention, including a main water storage bottle 100, an air inlet pipe 200, an air outlet pipe 300 and a backflow prevention device 400.

[0019] Specifically, the main water storage bottle 100 stores humidifying liquid and has an air outlet at the top. The air inlet pipe 200 includes an air pipe 210 and an oxygen pipe 220. The air pipe 210 and the oxygen pipe 220 respectively supply air and oxygen to the main water storage bottle 100. The air outlet pipe 300 is connected to the air outlet.

[0020] The backflow prevention device 400 includes a first connecting pipe 410, a first one-way valve 420, a first temporary storage bottle 430, and a float 440. The first temporary storage bottle 430 is connected to the main water storage bottle 100 via the first connecting pipe 410. The first one-way valve 420 is disposed within the first connecting pipe 410. When a predetermined pressure is reached, the first one-way valve 420 opens toward the main water storage bottle 100. The float 440 floats on the main water storage bottle 100. When the liquid level rises to the top of the main water storage bottle 100, the float 440 seals the air outlet pipe 300.

[0021] During use, air and oxygen enter the main water storage bottle 100 through the air tube 210 and oxygen tube 220. When the air pressure in the main water storage bottle 100 suddenly rises (such as due to a patient's exhaled backflow or the influx of a large amount of air and oxygen), the liquid level in the main water storage bottle 100 rises rapidly, and the float 440 floats with the liquid. If the liquid level rises abnormally to the top, the float 440 blocks the air outlet pipe 300. This blockage prevents liquid from entering the patient's respiratory tract. Simultaneously, after the air outlet pipe 300 is blocked, the pressure in the main water storage bottle 100 rises again instantaneously. When the preset pressure is reached, the air pressure pushes the liquid toward the first connecting pipe 410, forcing the first one-way valve 420 to open, temporarily storing the liquid in the first temporary storage bottle 430 to prevent it from flowing back into the air source.

[0022] The dual anti-backflow mechanism of the one-way valve drainage combined with the float plug physical blocking can effectively prevent the humidification liquid from flowing back into the gas source or the patient, reducing cross contamination and lowering the risk of patient inhalation.

[0023] In this embodiment, the float 440 is composed of a floating block 441 and a weighted ball 442. The weighted ball 442 is fixed to the bottom of the float 441, and the top of the float 441 is a tapered body with a gradually decreasing outer diameter. The weighted ball 442 lowers the center of gravity of the float 440, ensuring that the cone is always perpendicular to the outlet pipe 300.

[0024] The top of the float 441 is a cone with an outer diameter gradually decreasing from bottom to top, and the inner top of the main water storage bottle 100 is a cone with a diameter gradually decreasing. When the liquid level rises to the top, the cone can be inserted into the air outlet pipe 300 to block the air outlet pipe 300.

[0025] During use, as the liquid level rises, the float 441 rises vertically. When the liquid level reaches the top of the main water storage bottle 100, the cone precisely inserts into the lower end of the outlet tube 300, creating a seal. The tapered design enhances sealing, while the weighted ball 442 prevents the float 440 from tilting, improving plugging reliability.

[0026] In this embodiment, the first one-way valve 420 includes an elastic support member 421 (e.g., a spring) and a sealing plate 422. The elastic support member 421 is supported between the inner wall of the first connecting tube 410 and the sealing plate 422. Under the pressure of the elastic support member 421, the sealing plate 422 covers the end of the first connecting tube, sealing the first connecting tube. The elastic support member 421 provides a preload force to maintain the seal.

[0027] During use, under normal air pressure, the sealing plate 422 is tightly attached to the flow hole. When the pressure in the main water storage bottle 100 exceeds the preset pressure, i.e., the elastic force of the elastic support member 421, the sealing plate 422 is pushed open, and the liquid flows into the first temporary storage bottle 430. The seal is automatically restored after the pressure is restored.

[0028] As a preferred embodiment, the device also includes an automatic liquid replenishing system 500, which is connected to the main water storage bottle 100. When the liquid level in the main water storage bottle 100 drops, the automatic liquid replenishing system 500 can automatically replenish the main water storage bottle 100 with humidifying liquid so that the liquid level in the main water storage bottle 100 remains unchanged.

[0029] Specifically, the automatic fluid replenishment system 500 includes a float 510 , a guide rod 520 , a guide block 530 , a fluid replenishment water storage bottle 540 , a fluid replenishment tube, a pressure block 550 and a second one-way valve 560 .

[0030] The float 510 floats in the main water storage bottle 100, the guide rod 520 is set on the float 510, the guide block 530 is set in the main water storage bottle 100, the guide block 530 is provided with a vertical downward guide hole, the guide rod 520 can slide up and down and be inserted into the guide hole, the rehydration water storage bottle 540 is connected to the main water storage bottle 100 through a connecting pipe, the second one-way valve 560 is set between the rehydration water storage bottle 540 and the main water storage bottle 100, and the switch 570 of the second one-way valve 560 is a pressure type The switch 570 is arranged on the upper surface of the guide block 530 and is located at a preset height. The pressing block 550 is arranged on the guide rod 520 and is located above the guide block 530. When the pressing block 550 is pressed on the switch 570 of the second one-way valve 560 by gravity, the second one-way valve 560 is in an open state, and the second one-way valve 560 can be opened toward the main water storage bottle 100. When the pressure of the switch 570 of the second one-way valve 560 is released, the second one-way valve 560 is in a closed state.

[0031] During use, when the liquid level in the main water storage bottle 100 drops due to use or sudden drop, the pressure block 550 is pressed against the switch 570 of the second one-way valve 560 by gravity, and the second one-way valve 560 opens to replenish liquid into the main water storage bottle 100. When the liquid level reaches a preset height, the float 510 floats on the liquid surface again, the pressure of the pressure block 550 is released, the pressure block 550 is separated from the switch 570 of the second one-way valve 560, the valve is closed, and water replenishment stops.

[0032] In this way, the liquid level in the main water storage bottle 100 can be kept constant to maintain the best humidification efficiency and reduce manual intervention.

[0033] As another preferred embodiment, the device also includes a gas mixing device 600, through which the air tube 210 and the oxygen tube 220 are connected to the main water storage bottle 100, for mixing the air and oxygen input from the air tube 210 and the oxygen tube 220 and then delivering them to the main water storage bottle 100.

[0034] Specifically, the gas mixing device 600 includes a mixing chamber 610, a nozzle 620, and an air pump 630. Two nozzles 620 are disposed within the mixing chamber 610 and arranged opposite each other. The air pipe 210 and the oxygen pipe 220 are connected to the two nozzles 620, respectively. The air pump 630 is located on opposite sides of the two nozzles 620 and is used to pump the mixed oxygen and air into the main water storage bottle 100.

[0035] During use, air and oxygen are injected into the mixing chamber 610 through independent nozzles 620, and the air pump 630 transports the mixed gas to the bottom of the main water storage bottle 100. When the air pipe 210 and the oxygen pipe 220 are simultaneously intake air, the double nozzles 620 spray in opposite directions to form turbulence, forcing the gas to mix.

[0036] This method can ensure gas uniformity and avoid unstable humidification caused by bubbles of different sizes in the main water storage bottle 100.

[0037] As a more preferred embodiment, the gas mixing device 600 further includes a cylindrical spiral stirring blade 640 and a rotary power source for driving the spiral stirring blade 640 to rotate. The inner cavity of the mixing chamber 610 is cylindrical, and the spiral stirring blade 640 is disposed within the mixing chamber 610 and is coaxially arranged with the inner cavity of the mixing chamber 610. The outer wall of the spiral stirring blade 640 is aligned with the inner wall of the mixing chamber 610, and the length of the spiral stirring blade 640 is less than the height of the inner cavity of the mixing chamber 610. The rotary power source is connected to the spiral stirring blade 640 for driving the spiral stirring blade 640 to rotate, and the two nozzles 620 are respectively located on both sides of the spiral stirring blade 640.

[0038] When air is introduced, the power source drives the spiral blade to rotate, and the gas is fully mixed under the dual action of the jet from the nozzle 620 and the shear force of the spiral blade. This can significantly improve the mixing uniformity, reduce the disturbance of the humidifying liquid in the main water storage bottle 100, and extend the life of the device.

[0039] The aforementioned anti-backflow oxygen humidifier effectively prevents the humidifying liquid from flowing back into the gas source or patient, reducing cross-contamination and the risk of patient inhalation. It also automatically replenishes the humidifying liquid, minimizing manual intervention. Furthermore, by improving the uniformity of the oxygen and air mixing, it prevents unstable humidification caused by uneven bubble sizes within the main water storage bottle 100.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An oxygen humidification device with backflow prevention, characterized in that: include: A main water storage bottle, wherein the main water storage bottle stores humidifying liquid and the top of the main water storage bottle is provided with an air outlet; An air intake pipe, comprising an air pipe and an oxygen pipe, wherein the air pipe and the oxygen pipe respectively provide air and oxygen to the main water storage bottle; an air outlet pipe, connected to the air outlet; and The backflow prevention device includes a first connecting pipe, a first one-way valve, a first temporary storage bottle and a float. The first temporary storage bottle is connected to the main water storage bottle through the first connecting pipe. The first one-way valve is arranged in the first connecting pipe. When a predetermined pressure is reached, the first one-way valve is connected in the direction of the main water storage bottle. The float floats on the main water storage bottle. When the liquid level rises to the top of the main water storage bottle, the float can block the air outlet pipe.

2. The anti-backflow oxygen humidification device according to claim 1, characterized in that: The float plug includes a float block and a counterweight ball. The counterweight ball is fixed at the bottom of the float block. The top of the float block is a cone with an outer diameter gradually decreasing from bottom to top. The inner top of the main water storage bottle is a cone with a diameter gradually decreasing. When the liquid level rises to the top, the cone can be inserted into the air outlet pipe to block the air outlet pipe.

3. The anti-backflow oxygen humidification device according to claim 2, characterized in that: The first one-way valve includes an elastic support member and a sealing plate. The elastic support member is supported between the inner wall of the first connecting pipe and the sealing plate. Under the pressure of the elastic support member, the sealing plate covers the end of the first connecting pipe to seal the first connecting pipe.

4. The anti-backflow oxygen humidification device according to claim 1, characterized in that: It also includes an automatic liquid replenishing system, which is connected to the main water storage bottle. When the liquid level in the main water storage bottle drops, the automatic liquid replenishing system can automatically replenish the humidifying liquid into the main water storage bottle so that the liquid level in the main water storage bottle remains unchanged.

5. The anti-backflow oxygen humidification device according to claim 4, characterized in that: The automatic fluid replenishment system includes a float, a guide rod, a guide block, a fluid replenishment water storage bottle, a fluid replenishment tube, a pressure block and a second one-way valve; The float floats in the main water storage bottle, the guide rod is arranged on the float, the guide block is arranged in the main water storage bottle, a vertical downward guide hole is opened on the guide block, the guide rod can be inserted in the guide hole by sliding up and down, the fluid replacement water storage bottle is connected to the main water storage bottle, the second one-way valve is arranged between the fluid replacement water storage bottle and the main water storage bottle, the switch of the second one-way valve is a pressure switch, and is arranged on the upper surface of the guide block and is located at a preset height, the pressing block is arranged on the guide rod and is located above the guide block, when the pressing block is pressed on the switch of the second one-way valve by gravity, the second one-way valve is in an open state, the second one-way valve can be opened toward the main water storage bottle, and when the pressure of the switch of the second one-way valve is released, the second one-way valve is in a closed state.

6. The anti-backflow oxygen humidification device according to claim 1, characterized in that: It also includes a gas mixing device, through which the air pipe and the oxygen pipe are connected to the main water storage bottle, and is used to mix the air and oxygen input from the air pipe and the oxygen pipe and then deliver them to the main water storage bottle.

7. The anti-backflow oxygen humidification device according to claim 6, characterized in that: The gas mixing device includes a mixing chamber, a nozzle and an air pump. There are two nozzles, which are arranged in the mixing chamber and opposite to each other. The air pipe and the oxygen pipe are respectively connected to the two nozzles. The air pump is arranged on the opposite sides of the two nozzles and is used to draw the mixed gas formed by the mixed oxygen and air into the main water storage bottle.

8. The anti-backflow oxygen humidification device according to claim 7, characterized in that: The gas mixing device also includes a cylindrical spiral stirring blade and a rotating power source for driving the spiral stirring blade to rotate. The inner cavity of the mixing chamber is cylindrical. The spiral stirring blade is arranged in the mixing chamber and is coaxial with the inner cavity of the mixing chamber. The outer wall of the spiral stirring blade and the inner wall of the mixing chamber, the length of the spiral stirring blade is less than the height of the inner cavity of the mixing chamber, the rotating power source is connected to the spiral stirring blade, and is used to drive the spiral stirring blade to rotate. The two nozzles are respectively located on both sides of the spiral stirring blade.

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