A negative pressure wound drainage device

Abstract

This invention provides a negative pressure drainage device, including a liquid tank, a main board, and an air pump. The liquid tank is topped with a cover, and air inlets and drainage outlets are located on the left and right sides of the cover. The main board is mounted on the upper side of the cover. The air pump is installed between the main board and the cover, with its inlet connected to one end of a one-way valve. The other end of the one-way valve is connected to one end of a Y-shaped pipe. The other end of the Y-shaped pipe extends into a first branch and a second branch. The first branch connects to the liquid tank via an air inlet, and a one-way check valve is installed at the connection point between the first branch and the air inlet. The second branch connects to a pressure sensor integrated on the main board, and the pressure sensor is electrically connected to the main board. A drainage pipe connects the drainage outlet to the outside environment. This invention connects the liquid tank, pressure sensor, and air pump via a Y-shaped pipe, enabling real-time monitoring and precise adjustment of the liquid tank pressure. The device also features a short piping system, making maintenance simple and efficient.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a negative pressure drainage device. Background Technology

[0002] In the field of medical negative pressure drainage, most current products have loose connections between the gas path and pressure monitoring components. Pressure detection components are often independent of the core gas path or connected in series via complex tubing. This design not only increases the probability of gas path leakage but also makes the system susceptible to airflow instability, leading to distorted pressure monitoring data that fails to accurately reflect the actual negative pressure state during drainage. This makes it difficult for medical staff to adjust operations based on reliable data, potentially affecting the drainage's effectiveness. Furthermore, the anti-backflow design of the gas path system is often lacking or inadequate. When the device experiences pressure fluctuations or shuts down, the drainage fluid can easily flow backward along the gas path, damaging core components and potentially interrupting the drainage process, threatening patient safety.

[0003] Furthermore, the existing negative pressure drainage devices lack a systematic overall structural design, with core functional modules scattered throughout. These modules require long-distance tubing connections. This dispersed layout not only results in a bulky device occupying excessive medical space and lacking flexibility in space-constrained settings such as wards and emergency rooms, but also increases airflow resistance due to the excessively long tubing, reducing negative pressure conduction efficiency and causing slow and unstable negative pressure build-up within the fluid chamber, making it difficult to quickly meet clinical emergency drainage needs. Simultaneously, the dispersed structure also inconveniences daily maintenance and operation, making procedures cumbersome for medical staff when replacing consumables and repairing equipment, increasing workload and impacting the efficiency of medical services. Utility Model Content

[0004] To address the aforementioned technical issues, this utility model provides a negative pressure drainage device. It employs a Y-shaped pipe connecting an air pump, a pressure sensor integrated into the main board, and an air inlet in the liquid tank. Combined with a one-way check valve at the air path end of the liquid tank, it achieves accurate and real-time pressure acquisition, preventing backflow of drainage fluid and damage to components. At the same time, the device shortens the pipeline, reduces air path redundancy, and is simple and efficient to maintain, meeting the clinical needs for efficient and safe drainage.

[0005] To achieve its technical objectives, this utility model adopts the following technical solution:

[0006] A negative pressure drainage device includes a liquid tank, a main board, and an air pump. The top of the liquid tank is covered with a tank cover, and air inlets and drainage outlets are respectively opened on the left and right sides of the tank cover. The main board is installed on the upper side of the tank cover. The air pump is installed between the main board and the tank cover, and the air inlet of the air pump is connected to one end of a one-way air valve through a connecting pipe. The other end of the one-way air valve is connected to one end of a Y-shaped pipe. The other end of the Y-shaped pipe is provided with a first branch and a second branch that are interconnected. The first branch is connected to the liquid tank through the air inlet, and a one-way check valve is provided at the connection between the first branch and the air inlet. The second branch is connected to a pressure sensor integrated on the main board, and the pressure sensor is electrically connected to the main board. The drainage outlet is connected to a drainage pipe and connected to the outside.

[0007] Preferably, a housing is installed on the upper side of the compartment cover, and an installation cavity is formed between the housing and the compartment cover, and a base is provided in the installation cavity.

[0008] More preferably, the air pump is fixedly installed on the base, and a through hole adapted to the second branch is opened on the left side of the base. The second branch passes through the through hole and is connected to the air port through the one-way check valve.

[0009] More preferably, a first sealing ring and a second sealing ring are respectively arranged around the upper and lower ends of the one-way check valve. The first sealing ring abuts against the inner wall of the through hole, and the second sealing ring abuts against the inner wall of the air port. The first sealing ring and the second sealing ring are used to ensure the sealing of the connection between the one-way check valve and other components.

[0010] Preferably, one end of the drainage pipe is detachably connected to a connector and communicates with the drainage port through the connector, and the other end is detachably connected to a pagoda head and communicates with the outside through the pagoda head.

[0011] Preferably, it also includes a battery, which is installed in the mounting cavity, and the motherboard and the air pump are both electrically connected to the battery.

[0012] Preferably, it also includes a button, which is mounted on top of the motherboard and is snapped onto the housing.

[0013] Preferably, it also includes a display screen, which is embedded in the upper surface of the housing and electrically connected to the motherboard. The display screen is used to display the pressure inside the liquid tank.

[0014] Preferably, a charging port is provided on the left side of the motherboard, and a plug adapted to the charging port is provided on the left side of the outer casing.

[0015] Preferably, the volume of the liquid tank is between 100ml and 1000ml.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention optimizes the overall design of the gas path system by integrating the pressure sensor onto the motherboard and connecting it to the core gas path via a Y-shaped pipe. This reduces redundant gas path connections, minimizes leakage and airflow interference, and ensures real-time and accurate pressure data. At the same time, one-way check valves are installed at key nodes in the gas path to prevent backflow of the drainage fluid, protect the components, and ensure continuous and stable drainage.

[0018] This utility model integrates the motherboard, air pump, and liquid tank cover, reducing the size of the device, saving medical space, shortening the pipeline between modules, improving the negative pressure transmission efficiency, simplifying the assembly and maintenance process, and reducing the burden on medical staff. Attached Figure Description

[0019] Figure 1 This is an exploded view of this utility model;

[0020] Figure 2 yes Figure 1 Enlarged view of section A;

[0021] Figure 3 This is a schematic diagram of the exposed structure of the air pump part of this utility model;

[0022] Figure 4 This is a longitudinal sectional view of the present invention from a first angle.

[0023] Figure label:

[0024] 1. Liquid tank; 2. Main board; 3. Air pump; 4. Tank cover; 5. Air inlet; 6. Drainage port; 7. Connecting pipe; 8. One-way air valve; 9. Y-shaped pipe; 10. First branch; 11. Second branch; 12. One-way check valve; 13. Pressure sensor; 14. Drainage pipe; 15. Housing; 16. Base; 17. First sealing ring; 18. Second sealing ring; 19. Connector; 20. Pagoda head; 21. Battery; 22. Button; 23. Display screen; 24. Plug. Detailed Implementation

[0025] In the description of this utility model, it should be noted that the terms "upper / lower," "front / rear," "inner / outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are only used to more clearly correspond to different connection positions in the description, and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within the components of a compatible model. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, unless otherwise specified, all components used in this application are commercially available components, and the connection between different components can be achieved through conventional technical means.

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] A negative pressure drainage device, such as Figures 1-4 As shown, the system includes a liquid tank 1, a main board 2, and an air pump 3. The top of the liquid tank 1 is detachably covered with a tank cover 4. Air inlets 5 and drainage outlets 6 are respectively opened on the left and right sides of the tank cover 4. The main board 2 is installed on the upper side of the tank cover 4. The air pump 3 is installed between the main board 2 and the tank cover 4. The air inlet of the air pump 3 is connected to one end of a one-way valve 8 through a connecting pipe 7, and the air outlet of the air pump 3 is connected to the outside. The other end of the one-way valve 8 is connected to one end of a Y-shaped pipe 9. The other end of the Y-shaped pipe 9 is provided with a first branch 10 and a second branch 11 that are connected to each other. The first branch 10 is connected to the liquid tank 1 through the air inlet 5, and a one-way check valve 12 is provided at the connection between the first branch 10 and the air inlet 5. The second branch 11 is connected to a pressure sensor 13 integrated on the main board 2, and the pressure sensor 13 is electrically connected to the main board 2. A drainage pipe 14 is connected to the drainage outlet 6 to connect to the outside.

[0029] It should be noted that the function of the one-way air valve 8 is to prevent the pressure in the liquid tank 1 and pipeline from leaking from the air pump 3 when the air pump 3 stops working; the one-way check valve 12 can prevent the waste liquid in the liquid tank 1 from entering the main unit (the upper part of the base 16) and causing damage to the main unit.

[0030] Preferably, a housing 15 is installed on the upper side of the cover 4, and an installation cavity is formed between the housing 15 and the cover 4. A base 16 is provided in the installation cavity. The air pump 3 is fixedly installed on the base 16. A through hole adapted to the second branch 11 is opened on the left side of the base 16. The second branch 11 passes through the through hole and is connected to the air port 5 through the one-way check valve 12.

[0031] As a preferred embodiment, a first sealing ring 17 and a second sealing ring 18 are respectively arranged around the upper and lower ends of the one-way check valve 12. The first sealing ring 17 abuts against the inner wall of the through hole, and the second sealing ring 18 abuts against the inner wall of the air port 5. The first sealing ring 17 and the second sealing ring 18 are used to ensure the airtightness of the connection between the one-way check valve 12 and other components.

[0032] As a preferred option, such as Figure 2 As shown, one end of the drainage pipe 14 is detachably connected to a connector 19 and communicates with the drainage port 6 through the connector 19, and the other end is detachably connected to a pagoda head 20 and communicates with the outside through the pagoda head 20; the entire drainage pipe 14 is easy to disassemble and clean, and the pagoda head 20 supports multiple disassembly and assembly, and the overall assembly has good airtightness.

[0033] Preferably, the battery 21 is installed inside the mounting cavity, and both the main board 2 and the air pump 3 are electrically connected to the battery 21.

[0034] Preferably, button 22 is mounted on top of motherboard 2 and button 22 is snapped onto housing 15.

[0035] Preferably, a display screen 23 is also included. The display screen 23 is embedded in the upper surface of the housing 15 and is electrically connected to the motherboard 2. The display screen 23 is used to display the pressure inside the liquid tank 1.

[0036] Preferably, a charging port is provided on the left side of the motherboard 2, and a plug 24 adapted to the charging port is provided on the left side of the outer casing 15.

[0037] Preferably, the volume of liquid tank 1 is between 100ml and 1000ml; in actual production applications, it can be replaced and adapted according to actual needs.

[0038] The working principle of this utility model is as follows:

[0039] like Figure 4 As shown, the air pump 3 is started, and the pagoda head 20 of the drainage pipe 14 is inserted into the user's liquid suction area. The air pump 3 will draw air from the inside of the liquid tank 1 through the air inlet via the one-way air valve 8, the Y-shaped pipe 9 and the one-way check valve 12, thereby creating a vacuum negative pressure condition. After that, the waste liquid will enter the liquid tank 1 through the drainage pipe 14, and the entire device will perform the work of waste liquid extraction. During the entire operation, since the first branch 10 of the Y-shaped pipe 9 is connected to the pressure sensor 13, the pressure sensor 13 always monitors the pressure in the liquid tank 1 and transmits the pressure information to the main board 2, which is finally displayed on the display screen 23. With the help of the display screen 23, the pressure sensor 13 and the button 22, the pressure in the liquid tank 1 can be adjusted and controlled in real time.

[0040] Although the embodiments of this utility model have been described in the specification, these embodiments are merely illustrative and should not limit the scope of protection of this utility model. Various omissions, substitutions, and modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A negative pressure drainage device, characterized in that, The device includes a liquid tank, a main board, and an air pump. The top of the liquid tank is covered with a tank cover. Air inlets and drainage outlets are respectively opened on the left and right sides of the tank cover. The main board is installed on the upper side of the tank cover. The air pump is installed between the main board and the tank cover, and the air inlet of the air pump is connected to one end of a one-way air valve through a connecting pipe. The other end of the one-way air valve is connected to one end of a Y-shaped pipe. The other end of the Y-shaped pipe is provided with a first branch and a second branch that are interconnected. The first branch is connected to the liquid tank through the air inlet, and a one-way check valve is provided at the connection between the first branch and the air inlet. The second branch is connected to the pressure sensor integrated on the motherboard, and the pressure sensor is electrically connected to the motherboard; the drainage port is connected to a drainage pipe and is connected to the outside.

2. The negative pressure drainage device as described in claim 1, characterized in that, An outer shell is installed on the upper side of the compartment cover, and an installation cavity is formed between the outer shell and the compartment cover. A base is provided inside the installation cavity.

3. The negative pressure drainage device as described in claim 2, characterized in that, The air pump is fixedly installed on the base. A through hole adapted to the second branch is opened on the left side of the base. The second branch passes through the through hole and is connected to the air port through the one-way check valve.

4. The negative pressure drainage device as described in claim 3, characterized in that, The one-way check valve is surrounded by a first sealing ring and a second sealing ring at its upper and lower ends, respectively. The first sealing ring abuts against the inner wall of the through hole, and the second sealing ring abuts against the inner wall of the air port. The first and second sealing rings are used to ensure the sealing of the connection between the one-way check valve and other components.

5. The negative pressure drainage device as described in claim 1, characterized in that, One end of the drainage pipe is detachably connected to a connector and communicates with the drainage port through the connector; the other end is detachably connected to a pagoda head and communicates with the outside through the pagoda head.

6. The negative pressure drainage device as described in claim 2, characterized in that, It also includes a battery, which is installed in the mounting cavity, and the motherboard and the air pump are both electrically connected to the battery.

7. A negative pressure drainage device as described in claim 2, characterized in that, It also includes buttons, which are mounted on top of the motherboard and are snapped onto the housing.

8. A negative pressure drainage device as described in claim 2, characterized in that, It also includes a display screen, which is embedded in the upper surface of the housing and electrically connected to the motherboard. The display screen is used to display the pressure inside the liquid tank.

9. A negative pressure drainage device as described in claim 2, characterized in that, A charging port is provided on the left side of the motherboard, and a plug adapted to the charging port is provided on the left side of the casing.

10. A negative pressure drainage device as described in claim 1, characterized in that, The volume of the liquid tank is between 100ml and 1000ml.

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