Ventilator water tank water injection control device

Abstract

The utility model relates to medical instrument field discloses breathing machine water tank water injection control device, including humidification jar, the humidification jar includes jar body and jar cover, and the side wall of jar body upper portion is provided with water injection hole, and the jar cover is equipped with air inlet and vent, and the air inlet is connected with the air inlet pipe that extends into the jar body, and the vent is connected with the exhaust pipe, and the inboard rotation of jar cover is connected with L type lever, and the long arm end of L type lever is connected with the float ball, and the short arm end of L type lever is connected with elastic telescopic mechanism, and one baffle is rotationally connected on elastic telescopic mechanism, and the baffle is attached to the inner wall of jar body, and the baffle is closed or opened to water injection hole under the vertical sliding of L type lever drive. The utility model can solve the problem that the breathing machine water tank of prior art lacks liquid level control and causes the liquid reflux of breathing machine related pneumonia.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a water tank filling control device for a ventilator. Background Technology

[0002] As a vital life support device in clinical treatment, the stability of the humidification system of a ventilator directly affects the treatment outcome. In current technology, the liquid level control of the humidification tank mainly relies on manual operation, which has significant drawbacks:

[0003] Insufficient accuracy in fluid level control: Due to mechanical limitations, traditional float-type fluid level controllers typically exhibit fluid level fluctuations exceeding ±10mm. When the water level in the humidifier exceeds the safety threshold, fluid can easily flow back into the patient's airway through the breathing tubing. Clinical data indicates that fluid reflux caused by excessively high humidifier water levels is a significant contributing factor to ventilator-associated pneumonia (VAP), with an incidence rate as high as 23.4% (Source: *Critical Care Medicine*, 2023).

[0004] Furthermore, existing automatic irrigation devices lack real-time monitoring capabilities and cannot dynamically adjust the water flow rate. When pipe blockages or float ball jams occur, the system cannot automatically identify them, requiring nursing staff to conduct manual inspections every 2 hours, significantly increasing the consumption of medical resources. Utility Model Content

[0005] The present invention aims to provide a water filling control device for ventilator water tanks to solve the problem of ventilator-associated pneumonia caused by liquid backflow due to the lack of liquid level control in existing ventilator water tanks.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a ventilator water tank water injection control device, including a humidification tank, the humidification tank including a tank body and a tank cover, a water injection hole is provided on the upper side wall of the tank body, an air inlet and an air outlet are provided on the tank cover, an air inlet is connected to an air inlet pipe extending into the tank body, an air outlet is connected to an air outlet pipe, an L-shaped lever is rotatably connected to the inside of the tank cover, a float is connected to the end of the long arm of the L-shaped lever, an elastic telescopic mechanism is connected to the end of the short arm of the L-shaped lever, a baffle is rotatably connected to the elastic telescopic mechanism, the baffle is against the inner wall of the tank body, and the baffle slides vertically under the drive of the L-shaped lever to close or open the water injection hole.

[0007] Preferably, as an improvement, the baffle is made of polytetrafluoroethylene (PTFE) sheet.

[0008] Preferably, as an improvement, the elastic telescopic mechanism includes a sleeve fitted onto the end of the short arm of the L-shaped lever, the end of the sleeve being closed, an elastic element being provided between the end of the short arm and the sleeve, and the end of the sleeve being rotatably connected to the baffle.

[0009] Preferably, as an improvement, the sleeve has an integrally formed hinge seat at the closed end, and the baffle has an integrally formed hinge seat, with the two hinge seats connected by a pin.

[0010] Preferably, as an improvement, the inner side of the can lid is integrally formed with a hinge seat, and the bent part of the L-shaped lever is connected to the hinge seat on the inner side of the can lid by a pin.

[0011] Preferably, as an improvement, a U-shaped baffle is integrally formed inside the tank body, dividing the interior of the tank body into a water injection chamber and a U-shaped overflow chamber. The L-shaped lever, air inlet pipe, and baffle are all located in the water injection chamber, and the exhaust port is located above the overflow chamber.

[0012] The principle and advantages of this solution are as follows: In practical application, the humidifier is used to humidify the oxygen used by the ventilator. A certain amount of sterile distilled water is injected into the humidifier through the water injection hole. Oxygen enters the humidifier from the inlet pipe. The end of the inlet pipe extends below the liquid surface in the humidifier. After the oxygen enters the humidifier from the inlet pipe and comes into contact with the sterile distilled water, it is collected on the upper part of the tank and then discharged from the exhaust pipe for the patient to breathe. During use, to prevent the liquid level in the humidification tank from becoming too high, which could cause sterile distilled water to backflow into the exhaust pipe, a float provides real-time feedback on the liquid level inside the tank. An L-shaped lever then transmits this feedback to the vertical position of the baffle. If the liquid level exceeds the preset height, the float rises accordingly, causing the L-shaped lever to swing. This swings the short arm, and the change in distance between the end of the short arm and the inner wall of the tank, along with the elastic element holding the sleeve in place, pushes the baffle against the inner wall of the tank. Simultaneously, the swinging short arm causes the baffle to slide downwards, closing the water inlet and stopping the water filling process. This prevents the liquid level from increasing further and avoids the risk of backflow caused by excessively high sterile distilled water levels. Conversely, if the liquid level drops, the water inlet will automatically open to replenish the tank. The baffle is made of polytetrafluoroethylene (PTFE), which is non-toxic, has an ultra-low coefficient of friction, and is chemically resistant, ensuring that the short arm can smoothly close the water inlet. As a safety measure, an overflow chamber is formed inside the tank by a U-shaped baffle. When a small amount of water still enters the water filling chamber through the gap after the baffle is closed to the water filling hole, the excess sterile distilled water is buffered through the overflow chamber, giving medical staff enough time to manually monitor and handle the level of sterile distilled water in the humidification tank, further reducing the risk of backflow due to excessive liquid level. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0014] Figure 2 This is a top view of the tank body in an embodiment of this utility model. Detailed Implementation

[0015] The following detailed description illustrates the specific implementation method:

[0016] The reference numerals in the accompanying drawings include: tank body 1, tank cover 2, float ball 3, exhaust pipe 4, air inlet pipe 5, long arm 6, short arm 7, sleeve 8, elastic element 9, baffle 10, water injection pipe 11, water injection hole 12, U-shaped baffle 13, water injection chamber 14, overflow chamber 15.

[0017] The basic implementation examples are as follows: Figure 1 As shown: The ventilator water tank filling control device includes a humidification tank, which comprises a tank body 1 and a lid 2. The lid 2 is mechanically fitted to the open end of the tank body 1. Figure 2 As shown, a U-shaped partition 13 is integrally formed inside the tank body 1, dividing the internal space of the tank body 1 into a water injection chamber 14 and a U-shaped overflow chamber 15. A water injection hole 12 is provided on the upper side wall of the tank body 1 in the water injection chamber 14. The water injection hole 12 extends outward along the tank body 1 to form a water injection connector, and a water injection pipe 11 is inserted into the water injection connector. The water injection pipe 11 is connected to a water source, which continuously supplies sterile distilled water to the water injection pipe 11. The tank lid 2 is provided with an air inlet and an air outlet. An air inlet pipe 5 is inserted into the air inlet and extends into the tank body 1. The air outlet extends upward along the tank lid 2 to form an air outlet connector, and an air outlet pipe 4 is inserted into the air outlet connector. A hinge seat is integrally formed on the inner side of the tank lid 2, and an L-shaped lever is rotatably connected to the hinge seat. The bend of the L-shaped lever is connected to the hinge seat on the inner side of the tank lid 2 via a pin. A float 3 is attached to the end of the long arm 6 of the L-shaped lever, and an elastic telescopic mechanism is connected to the end of the short arm 7 of the L-shaped lever. The elastic telescopic mechanism includes a sleeve 8 fitted onto the end of the short arm 7 of the L-shaped lever. The end of the sleeve 8 is closed, and an elastic element 9 is provided between the end of the short arm 7 and the sleeve 8. The elastic element 9 is kept under pressure and is made of plastic spring. A baffle 10 is rotatably connected to the elastic telescopic mechanism. The baffle 10 is made of polytetrafluoroethylene. A hinge seat is integrally formed on the closed end of the sleeve 8, and a hinge seat is integrally formed on the baffle 10. The two hinge seats are connected by a pin. After the can lid 2 is connected to the can body 1, the hinge seat, the L-shaped lever, the float 3, and the baffle 10 are all located in the water injection cavity 14. The elastic element 9 pushes the sleeve 8 outward, so that the baffle 10 is in contact with the inner wall of the can body 1. The baffle 10 slides vertically under the drive of the L-shaped lever to close or open the water injection hole 12.

[0018] In this embodiment, the float 3, L-shaped lever, sleeve 8, elastic element 9, and pin are all made of polypropylene.

[0019] The specific implementation process is as follows: When the ventilator is working, sterile distilled water enters the tank body 1 from the water source through the water injection pipe 11 and the water injection hole 12. The oxygen supplied by the ventilator enters the tank body 1 from the air intake pipe 5, passing through the sterile distilled water in the tank body 1 in the form of bubbles, completing humidification, and then entering the exhaust pipe 4 from the exhaust port at the top. The water injection pipe 11 continuously injects water into the tank body 1, and the liquid level in the tank body 1 rises. If there is no liquid level control, there is a risk that the liquid level will be too high during use, and the sterile distilled water will backflow into the exhaust pipe 4 and enter the patient's breathing end, causing ventilator-associated pneumonia. In the solution of this utility model, the float 3 rises synchronously during the rise of the liquid level. The rising process of the float 3 is converted into the swing of the short arm 7 by the L-shaped lever. The swing of the short arm 7 forms a vertical displacement and a lateral displacement of the end of the short arm 7 relative to the tank body 1. The lateral displacement is compensated by the pushing of the sleeve 8 by the elastic element 9, so that the baffle 10 always stays against the inner wall of the tank body 1, and the baffle 10 exerts a certain pressure on the inner wall of the tank body 1. Once the liquid level inside the canister 1 reaches the preset height, water continues to be injected, causing the float 3 to rise. The L-shaped lever swings, causing the baffle 10 to gradually move downwards, completely sealing the water injection hole 12 and preventing the risk of backflow caused by the continued rise in the liquid level inside the canister 1. As the ventilator is used, the liquid level inside the canister 1 may gradually decrease, causing the float 3 to follow suit. The L-shaped lever swings synchronously, causing the baffle 10 to gradually move upwards, exposing the water injection hole 12 and allowing sterile distilled water to continue to be injected into the canister 1. To ensure the sealing effect of the baffle 10 on the water injection hole 12, the lateral displacement of the end of the short arm 7 during the swing of the L-shaped lever is limited to 2-5 mm, so that the thrust of the elastic element 9 can press the push plate against the inner wall of the canister 1. In actual implementation, the water injection chamber 14 provides a certain capacity of sterile distilled water. When the liquid level rises to the preset range, the float 3, L-shaped lever, and baffle 10 will close the water injection hole 12. If the seal between the baffle 10 and the water injection hole 12 is not tight enough and a small amount of water leaks out, the liquid level in the water injection chamber 14 may still rise. At this time, the overflow chamber 15 will buffer the excess sterile distilled water, providing sufficient redundancy time for medical staff to manually drain the water or shut off the water inlet, further reducing the risk of sterile distilled water flowing back into the drain pipe.

[0020] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A ventilator water tank filling control device, characterized in that: The device includes a humidification tank, which consists of a tank body and a tank cover. The upper side wall of the tank body has a water injection hole, and the tank cover has an air inlet and an air outlet. The air inlet is connected to an air inlet pipe that extends into the tank body, and the air outlet is connected to an air outlet pipe. An L-shaped lever is rotatably connected to the inside of the tank cover. A float ball is connected to the end of the long arm of the L-shaped lever, and an elastic telescopic mechanism is connected to the end of the short arm of the L-shaped lever. A baffle is rotatably connected to the elastic telescopic mechanism. The baffle is in contact with the inner wall of the tank body, and the baffle slides vertically under the drive of the L-shaped lever to close or open the water injection hole.

2. The ventilator water tank filling control device according to claim 1, characterized in that: The baffle is made of polytetrafluoroethylene (PTFE).

3. The ventilator water tank filling control device according to claim 2, characterized in that: The elastic telescopic mechanism includes a sleeve fitted onto the end of the short arm of the L-shaped lever. The end of the sleeve is closed, and an elastic element is provided between the end of the short arm and the sleeve. The end of the sleeve is rotatably connected to the baffle.

4. The ventilator water tank filling control device according to claim 3, characterized in that: The sleeve has an integrally formed hinge seat at the closed end, and the baffle has an integrally formed hinge seat. The two hinge seats are connected by a pin.

5. The ventilator water tank filling control device according to claim 4, characterized in that: The inner side of the can lid is integrally formed with a hinge seat, and the bent part of the L-shaped lever is connected to the hinge seat on the inner side of the can lid by a pin.

6. The ventilator water tank filling control device according to claim 5, characterized in that: The tank body is integrally formed with a U-shaped partition, which divides the inside of the tank body into a water injection chamber and a U-shaped overflow chamber. The L-shaped lever, air inlet pipe and baffle are all located in the water injection chamber, and the exhaust port is located above the overflow chamber.

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