Replaceable drainage bottle electric negative pressure drainage device

Abstract

The application discloses a replaceable drainage bottle electric negative pressure drainage device, which comprises a main machine and at least one sterilized drainage bottle, the main machine is detachably connected with the drainage bottle through a quick change mechanism; the quick change mechanism comprises a bottle body connecting buckle arranged on the drainage bottle and a mounting and dismounting mechanism arranged on the main machine, the mounting and dismounting mechanism is used for being connected with the bottle body connecting buckle, and comprises a sliding button, a locking slide, a buckle sliding block and a touch switch; a main control board, a vacuum pump and a sensor assembly are arranged in the main machine. The application has the beneficial effects that the main machine and the drainage bottle are designed to be separated and quickly changed, a single main machine can be used in combination with multiple pre-sterilized drainage bottles, liquid in the drainage bottle does not need to be drained after being filled, the drainage can be continued by directly and quickly replacing the drainage bottle, the problem that the liquid is complicated to drain and is easy to be infected in the prior art is solved, the waste of the main machine part is avoided, the medical cost is reduced, and the generation of medical waste is obviously reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of subcutaneous drainage devices in clinical surgery, and particularly relates to an electric negative pressure drainage device with a replaceable drainage bottle. Background Technology

[0002] Current electric negative pressure drainage devices are generally sterile, disposable, one-piece structures, with the main unit and drainage bottle fixed together and unable to be disassembled and replaced. When the drainage bottle is full of fluid, medical staff can only drain the fluid on-site through the drainage interface, which is cumbersome and prone to cross-infection, and cannot meet the needs of continuous drainage of large amounts of waste fluid during surgery. If a new one-piece drainage device is directly replaced, the undamaged main unit will be discarded, significantly increasing medical costs and causing serious waste of resources.

[0003] In addition, existing electric negative pressure drainage devices generally suffer from limited functionality and insufficient safety protection: most only support a single drainage mode, failing to adapt to the drainage needs of different clinical scenarios; they only use a single liquid level sensor for overflow protection, which can easily lead to backflow of drainage fluid when the sensor fails; they lack a tilt protection design, making it easy for waste liquid to enter the gas path and damage the main unit when the drainage device is tilted; the gas path is not designed for separation, resulting in low negative pressure control accuracy and poor backflow prevention; and they lack a dedicated quick-change mechanism and safety interlock mechanism, making it easy for liquid to splash when the drainage bottle is forcibly removed under negative pressure, posing a significant risk of infection. Summary of the Invention

[0004] The objective of this invention is to address the problems of existing electric negative pressure drainage devices, which are disposable integral structures, have cumbersome and infection-prone drainage after the drainage bottle is full, have high overall replacement costs and waste resources, lack safety interlock mechanisms, pose a risk of splashing and infection when disassembling the negative pressure bottle, and have an imperfect safety protection system.

[0005] To achieve the above objectives, the present invention provides a replaceable drainage bottle electric negative pressure drainage device.

[0006] The specific technical solution adopted in this invention is as follows: A replaceable drainage bottle electric negative pressure drainage device, the drainage device comprising: The main unit and at least one sterile drainage bottle are detachably connected to the drainage bottle via a quick-change mechanism; The quick-change mechanism includes a bottle body connecting buckle disposed on the drainage bottle and a loading and unloading mechanism disposed on the main unit. The loading and unloading mechanism is used to dock with the bottle body connecting buckle and includes a sliding button, a locking slide, a buckle slider and a touch switch. The host unit is equipped with a main control board, a vacuum pump, and a sensor assembly. The main control board is electrically connected to the vacuum pump, the tactile switch, and the sensor assembly, respectively. The main control board drives the vacuum pump to extract gas from the drainage bottle to create negative pressure; Sliding the sliding button causes the locking slider to slide, triggering the touch switch to generate an unlock signal. After receiving the unlock signal, the main control board automatically stops the vacuum pump and outputs a pressure relief prompt before changing the bottle. The sensor assembly includes a pressure sensor, which is used to monitor the negative pressure inside the drainage bottle and output a signal to the main control board.

[0007] Furthermore, the loading and unloading mechanism also includes a transmission slider, a bottle-removing button, and a spring; the transmission slider is fixedly connected to the bottle-removing button, and the transmission slider is provided with a guide groove, which is connected to the mating part on the buckle slider; when the bottle-removing button is pressed, the transmission slider retracts inward to compress the spring, causing the buckle slider to slide to both sides to achieve buckle separation; when the bottle-removing button is released, the transmission slider is driven by the spring to reset, causing the buckle slider to slide inward to achieve buckle locking.

[0008] 3. The replaceable drainage bottle electric negative pressure drainage device according to claim 2, characterized in that the locking slide is fixedly connected to the sliding button, and the locking slide is provided with a limiting part; when the limiting part abuts against the buckle slider, the movement of the buckle slider is restricted to achieve locking; when the limiting part is aligned with the mating part of the buckle slider, the movement restriction on the buckle slider is released.

[0009] Furthermore, the drainage bottle is equipped with a drainage interface and a pressure relief port; the drainage interface is connected to a duckbill one-way valve inside the bottle to prevent backflow of the drainage fluid; the pressure relief port is a Luer connector with a protective cap and an internal filter membrane to block microorganisms in the air during pressure relief and maintain a sterile state inside the drainage bottle.

[0010] Furthermore, the drainage bottle is formed by a drainage bottle body and a drainage bottle top cover that are sealed together. The drainage bottle top cover is provided with a vent hole and a hydrophilic-hydrophobic composite sealing ring. The vent hole side of the hydrophilic-hydrophobic composite sealing ring is made of a hydrophobic material, and the drainage bottle side is made of a hydrophilic material. The drainage bottle side surface and the inside of the vent hole are treated with hydrophobicity.

[0011] Furthermore, the drainage bottle is equipped with a baffle plate, which is fixedly connected to the drainage bottle body; the baffle plate is used to prevent waste liquid from entering the vent when the drainage device is tilted, and the waste liquid can flow back to the bottom of the bottle along the slope of the baffle plate after being straightened.

[0012] Furthermore, a dual air path is provided between the main unit and the drainage bottle, which is connected to the main unit's air vent via a three-way connector; one air path is connected to a pressure sensor for pressure measurement, and the other air path is connected to the vacuum pump inlet via a check valve for drawing negative pressure.

[0013] Furthermore, the sensor assembly also includes a tilt sensor and a liquid level sensor; the tilt sensor is used to detect the tilt angle of the drainage device, and when the tilt angle reaches a preset threshold, the main control board triggers a tilt alarm and stops the vacuum pump; the liquid level sensor is used to detect the upper limit of the liquid level in the drainage bottle, and when the liquid level reaches the upper limit, the main control board triggers a liquid level alarm and stops the vacuum pump.

[0014] Furthermore, the main control board has a built-in liquid level estimation module that estimates the current liquid level in the drainage bottle based on the operating parameters of the vacuum pump. When the liquid level approaches the upper limit of safety, an early warning is output. The liquid level estimation module has a built-in vacuum pump pumping efficiency model, which is a pre-calibrated table showing the corresponding relationship between the vacuum pump's pumping volume per unit time under different negative pressures. The main control board estimates the current liquid level based on the pumping efficiency, the air pressure before and after pumping, and the pumping time, and performs data correction by weighted averaging of multiple pumping calculation results.

[0015] Furthermore, the main unit is equipped with an operation panel on its top, which includes indicator lights, a display, and buttons. The buttons include a power switch, a mode switch, and a rotary knob. The mode switch is used to switch between constant pressure mode and continuous drainage mode. In constant pressure mode, the main control board controls the pressure inside the drainage bottle to remain constant at a preset value. In continuous drainage mode, an upper limit pressure and a lower limit pressure can be set. When the pressure inside the bottle is lower than the lower limit pressure, the main control board starts the vacuum pump to pump air to the upper limit pressure.

[0016] The positive effects of this invention are as follows: The main unit and drainage bottle are designed for separate quick-change, allowing a single main unit to be used with multiple pre-sterilized drainage bottles. Once the drainage bottle is full, there is no need to drain it; it can be quickly replaced to continue drainage, completely solving the problems of cumbersome drainage and easy infection associated with existing technologies. This also avoids waste of the main unit, reduces medical costs, and significantly reduces medical waste generation. The mechanical locking and unlocking electronically controlled quick-change mechanism automatically triggers a touch switch when unlocked via a sliding button, immediately stopping the vacuum pump and indicating pressure relief on the main control board, fundamentally eliminating the risk of liquid splashing and infection caused by negative pressure bottle removal. The dual locking design ensures the drainage... During the drainage process, the main unit and the drainage bottle are firmly connected and will not accidentally fall off; the dual air path separation design improves the accuracy of negative pressure control and the anti-backflow effect; the duckbill one-way valve, liquid baffle, hydrophobic vent, and hydrophilic-hydrophobic composite sealing ring provide multiple anti-backflow measures; software liquid level estimation and hardware liquid level sensor provide dual anti-overflow protection; tilt alarm, liquid level alarm, and low battery alarm provide multi-dimensional safety prompts to fully ensure clinical safety; multiple drainage modes can be flexibly switched according to different surgical types and drainage needs, making it more applicable; the operation panel intuitively displays pressure, liquid level, mode, and alarm information, making operation simple and convenient and reducing the workload of medical staff. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the overall structure of the replaceable drainage bottle electric negative pressure drainage device of the present invention, in the closed state; Figure 2 This is a schematic diagram of the overall structure of the replaceable drainage bottle electric negative pressure drainage device of the present invention, in its separated state; Figure 3 This is a cross-sectional structural schematic diagram of the replaceable drainage bottle electric negative pressure drainage device of the present invention; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the drainage bottle of the present invention; Figure 6 yes Figure 5 Top view; Figure 7 This is a top view of the host controller of the present invention, wherein the bottom protrusion is the protective cover of the sliding button; Figure 8 yes Figure 7 The side view shows the removal of the cover from the sliding button. Figure 9 yes Figure 7 A three-dimensional schematic diagram of the internal structure of the host controller; Figure 10 It's from another perspective. Figure 7 A three-dimensional schematic diagram of the internal structure of the host controller; Figure 11 yes Figure 10 A partial three-dimensional structural diagram of the explosion; Figure 12 This is a schematic diagram of the operation panel of the present invention; Figure 13 This is a schematic diagram of the bottom structure of the top cap of the drainage bottle of the present invention; Figure 14 This is a block diagram of the control principle of the main control board of this invention; Legend: 101-Main unit, 102-Drainage bottle, 103-Drainage interface, 104-Pressure relief port, 105-Duckbill check valve, 106-Snap fastener, 107-Drainage bottle top cover; 201-Main control board, 202-Battery compartment, 203-Power input, 204-Liquid level signal input, 205-Vacuum pump power output, 206-Check valve, 207-Vacuum pump, 208-Main unit vent, 209-Bottle removal button, 210-Liquid level sensor, 211-Baffle plate, 212-Sealing ring, 213-Drainage bottle body, 214-Unlock signal input, 215- Main unit bottom cover; 216 - Vent hole for drainage bottle; 401 - Main unit controller; 402 - Loading / unloading mechanism; 403 - Sensor mounting slot; 404 - Transmission slider; 405 - Spring; 406 - Sliding button; 501 - Snap-on slider; 502 - Locking slide; 503 - Tactile switch; 504 - Snap-on; 601 - Indicator light; 602 - Display; 603 - Mode switching key; 604 - Knob button; 605 - Power switch; 701 - Filter membrane; 702 - Reinforcing rib; 801 - Pressure sensor; 802 - Tilt sensor; 803 - Button. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments: In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 invention.

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0021] like Figures 1 to 8 The diagram shown is a structural diagram of a replaceable drainage bottle electric negative pressure drainage device provided in an embodiment of the present invention. The drainage device includes: The main unit and at least one sterile drainage bottle are detachably connected to the drainage bottle via a quick-change mechanism; The drainage bottle is provided with a drainage interface, a pressure relief port and at least two symmetrically distributed buckles, and the bottle is provided with a duckbill one-way valve that communicates with the drainage interface. The main unit is divided into a main unit controller and a loading and unloading mechanism. The loading and unloading mechanism is used to dock with the buckle and consists of a transmission slider, a bottle removal button, a spring, a sliding button, a buckle slider, a locking slide, and a tactile switch. The host unit is equipped with a main control board, a vacuum pump, and a sensor assembly. The main control board is electrically connected to the vacuum pump, the tactile switch, and the sensor assembly, respectively. The main control board drives the vacuum pump to extract gas from the drainage bottle to create negative pressure; Sliding the sliding button causes the locking slider to slide, releasing the restriction on the latch slider and triggering the touch switch to generate an unlock signal. After receiving the unlock signal, the main control board automatically stops the vacuum pump and outputs a pressure relief prompt before changing the bottle.

[0022] In this embodiment of the invention, a separate quick-change design for the main unit and the drainage bottle is adopted. A single main unit can be used with multiple pre-sterilized drainage bottles. Once the drainage bottle is full, there is no need to drain it; it can be quickly replaced to continue drainage. This completely solves the problems of cumbersome drainage and easy infection associated with existing technologies, while also avoiding waste of the main unit, reducing medical costs, and significantly reducing medical waste generation. The mechanical locking and unlocking electronically controlled interlocking quick-change mechanism automatically triggers a touch switch when unlocked by sliding the button. The main control board immediately stops the vacuum pump and indicates pressure relief, fundamentally eliminating the risk of liquid splashing and infection caused by negative pressure bottle removal. The dual locking design ensures the drainage... During the drainage process, the main unit and the drainage bottle are firmly connected and will not accidentally fall off; the dual air path separation design improves the accuracy of negative pressure control and the anti-backflow effect; the duckbill one-way valve, liquid baffle, hydrophobic vent, and hydrophilic-hydrophobic composite sealing ring provide multiple anti-backflow measures; software liquid level estimation and hardware liquid level sensor provide dual anti-overflow protection; tilt alarm, liquid level alarm, and low battery alarm provide multi-dimensional safety prompts to fully ensure clinical safety; multiple drainage modes can be flexibly switched according to different surgical types and drainage needs, making it more applicable; the operation panel intuitively displays pressure, liquid level, mode, and alarm information, making operation simple and convenient and reducing the workload of medical staff.

[0023] While existing technologies include split-type drainage devices, none of them feature a mechanical locking-unlocking-electrical interlocking mechanism. This prevents them from automatically stopping the pump and providing a pressure relief warning upon unlocking, posing a safety hazard when disassembling the bottle under negative pressure. This invention fundamentally solves this problem through its interlocking mechanism, and the dual locking design ensures the reliability of the connection.

[0024] Specifically, such as Figures 1 to 8The diagram shown illustrates the structure and principle of a replaceable drainage bottle electric negative pressure drainage device according to an embodiment of the present invention. The drainage device includes a main unit 101 and at least one sterile drainage bottle 102. The main unit 101 and the drainage bottle 102 are detachably connected via a quick-change mechanism. The drainage bottle 102 is made of medical-grade material, sterilized, individually packaged, and for single use.

[0025] like Figure 1 and Figure 3 As shown, the drainage bottle 102 is equipped with a drainage interface 103, a pressure relief port 104, and multiple evenly distributed clips 106. Both the drainage interface 103 and the pressure relief port 104 are standard Luer connectors, equipped with protective caps and hanging straps for easy connection and hanging with clinically standard drainage tubes. The drainage bottle 102 contains a duckbill one-way valve 105 that communicates with the drainage interface 103, effectively preventing backflow of fluid from the bottle back into the patient's body through the drainage interface 103, thus avoiding retrograde infection.

[0026] like Figure 7 As shown, the pressure relief port 104 is equipped with a sterile filter membrane 701. When the cap of the pressure relief port 104 is unscrewed to release pressure, outside air can only enter the drainage bottle 102 through the filter membrane 701. The filter membrane 701 can block bacteria and viruses in the air, ensuring a sterile environment inside the drainage bottle during the pressure relief process. The bottom of the drainage bottle top cover 107 is provided with multiple reinforcing ribs 702 to improve the structural strength of the drainage bottle and prevent the bottle body from deforming under negative pressure.

[0027] like Figure 2 and Figure 3 As shown, the drainage bottle 102 is formed by a drainage bottle body 213 and a drainage bottle top cover 107, which are fixedly connected by a sealing process to ensure that there is no leakage under negative pressure. The drainage bottle top cover 107 is provided with a drainage bottle vent 216 and a hydrophilic-hydrophobic composite sealing ring 212. The hydrophilic-hydrophobic composite sealing ring 212 is made by a double-layer co-extrusion process. The vent side is made of hydrophobic material to prevent liquid from seeping into the main unit's gas circuit; the drainage bottle side is made of hydrophilic material to help condensed liquid flow back to the bottom of the bottle. The drainage bottle side surface and the inside of the drainage bottle vent 216 are both hydrophobic to further improve the anti-liquid penetration effect.

[0028] The drainage bottle 102 is equipped with an inclined baffle plate 211, which is fixed to the drainage bottle body 213 by an adhesive process. When the drainage device is accidentally tilted, the baffle plate 211 can prevent most of the waste liquid from entering the drainage bottle vent 216; if a small amount of waste liquid enters the chamber separated by the baffle plate 211, the waste liquid can automatically flow back to the bottom of the drainage bottle along the inclination of the baffle plate 211 after the drainage device is uprighted, and will not remain in the air passage.

[0029] like Figure 4 and Figure 5As shown, the main unit 101 is divided into a main unit controller 401 and a loading / unloading mechanism 402. The loading / unloading mechanism 402 is used to dock with the buckle 106 on the drainage bottle 102, and consists of a transmission slider 404, a bottle removal button 209, a spring 405, a sliding button 406, a buckle slider 501, a locking slider 502, and a tactile switch 503. The main unit bottom cover 215 is provided with a main unit vent 208 and a sensor mounting slot 403.

[0030] The transmission slider 404 is connected to the bottle removal button 209 via a fixing component. The transmission slider 404 has a pair of inclined grooves on each side, which engage with the cylindrical pins on the latch slider 501. When the bottle removal button 209 is pressed, the transmission slider 404 retracts inward, compressing the spring 405. Through the engagement of the inclined grooves and cylindrical pins, the two latch sliders 501 slide to the sides respectively, causing the latches to separate from the latches 106 on the drainage bottle 102. When the bottle removal button 209 is released, the transmission slider 404 is driven back to its original position by the spring force of the spring 405, causing the latch sliders 501 to slide inward from both sides respectively, thus locking the latches.

[0031] The locking slider 502 and the sliding button 406 are fixedly connected by an interference fit. The sliding button 406 is exposed on the side of the main unit for easy operation by medical staff. The locking slider 502 has two protrusions. When the sliding button 406 is in the locked position, the protrusions press against the side of the latch slider 501, restricting the movement of the latch slider 501. At this time, even if the bottle removal button 209 is accidentally pressed, the latch cannot be opened, ensuring a firm connection during drainage. When the sliding button 406 is slid to the unlocked position, the protrusions of the locking slider 502 align with the grooves on the latch slider 501, releasing the restriction on the movement of the latch slider 501. At this time, pressing the bottle removal button 209 can quickly remove the drainage bottle 102.

[0032] Simultaneously, when the sliding button 406 is slid to the unlock position, it presses the tactile switch 503. The tactile switch 503 is connected to the unlock signal input port 214 of the main control board 201 via a wire, generating an unlocked electrical signal. Upon receiving this signal, the main control board 201 immediately stops the operation of the vacuum pump 207 and displays a warning message on the display 602 indicating that pressure should be released before bottle replacement, reminding medical staff to perform the pressure release operation to prevent liquid splashing due to negative pressure bottle removal. The movement range of the locking slider 502 is limited by the latch 504 to prevent the sliding button 406 from falling off.

[0033] like Figure 2As shown, the main unit 101 includes a main control board 201, a battery compartment 202, a check valve 206, a vacuum pump 207, a bottle removal button 209, a liquid level sensor 210, a main unit bottom cover 215, and the aforementioned loading and unloading mechanism 402. The battery compartment 202 can accommodate rechargeable batteries to meet the needs of long-term clinical use. A dual-air path is established between the main unit and the drainage bottle, converging into a single path via a three-way connector and connecting to the main unit's vent 208. One air path connects to a pressure sensor 801 for real-time measurement of the negative pressure value within the drainage bottle; the other air path connects to the inlet of the vacuum pump 207 via the check valve 206 to draw gas from the drainage bottle to create negative pressure. The check valve 206 prevents gas and liquid from flowing back into the vacuum pump 207, protecting the internal components of the main unit from damage.

[0034] like Figure 8 As shown, the control principle block diagram of the main control board 201 includes a pressure sensor 801, a tilt sensor 802, a tactile switch 503, a button 803, a liquid level sensor 210, a vacuum pump 207, an indicator light 601, and a display 604. The button 803 includes a mode switch button 603, a rotary button 604, and a power switch 605.

[0035] Pressure sensor 801 monitors the negative pressure value inside the drainage bottle in real time and outputs an analog signal to the main control board 201. The main control board 201 controls the start and stop of vacuum pump 207 according to the preset pressure value. Tilt sensor 802 uses a triaxial accelerometer to detect changes in the tilt angle of the drainage device in real time. When the tilt angle reaches a preset threshold, the main control board 201 triggers a tilt alarm, illuminates a red indicator light, and stops vacuum pump 207 until the drainage device returns to a horizontal state. Liquid level sensor 210 uses a capacitive liquid level sensor and is installed in the sensor mounting slot 403 of the main unit's bottom cover 215. When the waste liquid level in the drainage bottle contacts the sensing surface of liquid level sensor 210, a liquid level alarm signal is triggered, the main control board 201 illuminates a red indicator light, and stops vacuum pump 207 until a new drainage bottle is replaced.

[0036] The main control board 201 incorporates a vacuum pump efficiency model, established by pre-calibrating the pumping rates of the vacuum pump under different negative pressures. This model is a pre-calibrated table showing the corresponding volume of air pumped per unit time under different negative pressures. During each pumping operation, the main control board records the initial and final pressures, as well as the pumping time. Based on the model, it calculates the volume of gas pumped and, combined with the total volume of the drainage bottle, estimates the current liquid level. Data correction is achieved through a weighted average of multiple pumping calculations. During each pumping operation, the main control board 201 calculates the volume of air in the drainage bottle based on the pumping efficiency model, the pressure values ​​before and after pumping, and the pumping time, thereby estimating the current liquid level. Data correction through multiple pumping calculations improves the accuracy of liquid level estimation. When the estimated liquid level reaches a preset percentage of the designed safe upper limit, the main control board 201 displays a warning message on the display 602 indicating that the liquid level is approaching the upper limit, alerting medical staff to prepare for bottle replacement. The position measured by the liquid level sensor 210 is the absolute upper limit of the liquid level that the container can hold. As the last line of defense, it can prevent the overflow of drainage liquid caused by the failure of the liquid level estimation model.

[0037] like Figure 6 As shown, the control panel on the top of the main unit includes indicator lights 601, a display 602, a mode switch 603, a rotary knob 604, and a power switch 605. Indicator lights 601 include a running indicator, a fault / alarm indicator, and a low battery indicator. The display 602 is a screen that can show the current pressure value, preset pressure value, alarm reminders, drainage mode, and battery information.

[0038] This invention supports two drainage modes: constant pressure and continuous drainage. Switching between modes is done by briefly pressing the mode switch button 603, and the display 602 shows the current drainage mode in real time. In constant pressure mode, the main control board 201 controls the vacuum pump 207 to maintain a constant pressure within the drainage bottle at a preset value, suitable for postoperative drainage scenarios requiring stable negative pressure. In continuous drainage mode, the upper and lower pressure limits can be switched by pressing the knob button 604, and the pressure value can be adjusted by rotating the knob button 604. When the pressure within the drainage bottle falls below the lower pressure limit, the main control board 201 activates the vacuum pump 207 to evacuate air, raising the pressure to the upper pressure limit before stopping. This cycle repeats to achieve continuous drainage, suitable for intraoperative drainage scenarios with large drainage volumes.

[0039] The hydrophilic-hydrophobic composite sealing ring is a ring structure, which is molded and press-fitted to the vent hole of the drainage bottle top cover; the thickness of the hydrophobic layer on the vent side is 1 / 2 the thickness of the hydrophilic layer on the drainage bottle side, to ensure sealing performance and anti-permeability effect.

[0040] The preset threshold of the tilt sensor is determined based on the critical angle at which waste liquid enters the airway when the drainage device tilts during clinical use, and can be preset and adjusted via the main control board.

[0041] In addition, the main unit and drainage bottle are designed to be easily interchangeable, allowing the main unit to be reused. Only the disposable sterile drainage bottle needs to be replaced, avoiding the disposal of the main unit and thus reducing medical costs and significantly reducing the generation of medical waste.

[0042] The method of using this invention is as follows: Open the packaging, take out the sterilized drainage bottle 102, and connect the drainage tube to the drainage port 103; Align the drainage bottle 102 with the bottom of the main unit 101 and push it upwards to lock the buckle 106 with the buckle of the loading and unloading mechanism, confirming that the connection is secure; when you hear a "click" sound of the buckle locking and the indicator light on the main unit shows that the connection is normal, confirm that the connection is secure; Press the power switch 605 to turn on the machine, and use the knob 604 to set the required negative pressure value and select the appropriate drainage mode. The main control board 201 starts the vacuum pump 207 to extract gas from the drainage bottle. It automatically stops after reaching the preset pressure and begins drainage. When the display indicates that the liquid level is close to the upper limit or the liquid level alarm is triggered, first slide the sliding button 406 to the unlock position. At this time, the vacuum pump will automatically stop and indicate that the pressure is being released. Unscrew the cap on the pressure relief port 104 to release pressure. After the negative pressure returns to zero, press the bottle removal button 209 to remove the full-filled drainage bottle. When the display shows a pressure value of 0, confirm that the negative pressure has returned to zero. Replace with a new sterilized drainage bottle and repeat the above steps to continue drainage.

[0043] The foregoing has broadly outlined some aspects and features of the various embodiments and should be interpreted as merely illustrative of potential applications. Other beneficial results can be obtained by applying the disclosed information in different ways or by combining aspects of the disclosed embodiments. Further aspects and a more complete understanding can be obtained based on the detailed description of exemplary embodiments with reference to the accompanying drawings, within the scope defined by the claims.

[0044] The above embodiments provide a detailed description of the present invention. Of course, the above description is not intended to limit the present invention, nor is the present invention limited to the examples described above. Any changes, modifications, additions, reductions, or substitutions made by those skilled in the art within the scope of the present invention are also within the protection scope of the present invention.

Claims

1. A replaceable drainage bottle electric negative pressure drainage device, characterized in that, The drain device includes: The main unit and at least one sterile drainage bottle are detachably connected to the drainage bottle via a quick-change mechanism; The quick-change mechanism includes a bottle body connecting buckle disposed on the drainage bottle and a loading and unloading mechanism disposed on the main unit. The loading and unloading mechanism is used to dock with the bottle body connecting buckle and includes a sliding button, a locking slide, a buckle slider and a touch switch. The host unit is equipped with a main control board, a vacuum pump, and a sensor assembly. The main control board is electrically connected to the vacuum pump, the tactile switch, and the sensor assembly, respectively. The main control board drives the vacuum pump to extract gas from the drainage bottle to create negative pressure; Sliding the sliding button causes the locking slider to slide, triggering the touch switch to generate an unlock signal. After receiving the unlock signal, the main control board automatically stops the vacuum pump and outputs a pressure relief prompt before changing the bottle. The sensor assembly includes a pressure sensor, which is used to monitor the negative pressure inside the drainage bottle and output a signal to the main control board.

2. The replaceable drainage bottle electric negative pressure drainage device according to claim 1, characterized in that, The loading and unloading mechanism also includes a transmission slider, a bottle removal button, and a spring; the transmission slider is fixedly connected to the bottle removal button, and the transmission slider is provided with a guide groove, which is connected to the mating part on the buckle slider; when the bottle removal button is pressed, the transmission slider retracts inward to compress the spring, causing the buckle slider to slide to both sides to achieve buckle separation; when the bottle removal button is released, the transmission slider is driven by the spring to reset, causing the buckle slider to slide inward to achieve buckle locking.

3. The replaceable drainage bottle electric negative pressure drainage device according to claim 2, characterized in that, The locking slider is fixedly connected to the sliding button, and the locking slider is provided with a limiting part; when the limiting part abuts against the latch slider, it restricts the movement of the latch slider to achieve locking; when the limiting part is aligned with the mating part of the latch slider, it releases the restriction on the movement of the latch slider.

4. The replaceable drainage bottle electric negative pressure drainage device according to claim 1, characterized in that, The drainage bottle is equipped with a drainage interface and a pressure relief port; the drainage interface is connected to a duckbill one-way valve inside the bottle to prevent backflow of the drainage fluid; the pressure relief port is a Luer connector with a protective cap and an internal filter membrane to block microorganisms in the air during pressure relief and maintain a sterile state inside the drainage bottle.

5. The replaceable drainage bottle electric negative pressure drainage device according to claim 1, characterized in that, The drainage bottle is composed of a drainage bottle body and a drainage bottle top cover that are sealed together. The drainage bottle top cover is provided with a vent hole and a hydrophilic-hydrophobic composite sealing ring. The vent hole side of the hydrophilic-hydrophobic composite sealing ring is made of a hydrophobic material, and the drainage bottle side is made of a hydrophilic material. The drainage bottle side surface and the inside of the vent hole are treated with hydrophobicity.

6. The replaceable drainage bottle electric negative pressure drainage device according to claim 5, characterized in that, The drainage bottle is equipped with a baffle plate, which is fixedly connected to the drainage bottle body. The baffle plate is used to prevent waste liquid from entering the vent when the drainage device is tilted. After it is straightened, the waste liquid can flow back to the bottom of the bottle along the slope of the baffle plate.

7. The replaceable drainage bottle electric negative pressure drainage device according to claim 1, characterized in that, A dual air path is provided between the main unit and the drainage bottle, which is connected to the main unit's air vent via a three-way connector; one air path is connected to a pressure sensor for pressure measurement, and the other air path is connected to the vacuum pump inlet via a check valve for drawing negative pressure.

8. The replaceable drainage bottle electric negative pressure drainage device according to claim 1, characterized in that, The sensor assembly also includes a tilt sensor and a liquid level sensor; the tilt sensor is used to detect the tilt angle of the drainage device, and when the tilt angle reaches a preset threshold, the main control board triggers a tilt alarm and stops the vacuum pump; the liquid level sensor is used to detect the upper limit of the liquid level in the drainage bottle, and when the liquid level reaches the upper limit, the main control board triggers a liquid level alarm and stops the vacuum pump.

9. The replaceable drainage bottle electric negative pressure drainage device according to claim 1, characterized in that, The main control board has a built-in liquid level estimation module that estimates the current liquid level in the drainage bottle based on the operating parameters of the vacuum pump. When the liquid level approaches the upper limit of safety, it outputs a warning. The liquid level estimation module has a built-in vacuum pump pumping efficiency model, which is a pre-calibrated table showing the correspondence between the vacuum pump's pumping volume per unit time under different negative pressures. The main control board estimates the current liquid level based on the pumping efficiency, the air pressure before and after pumping, and the pumping time, and performs data correction by weighted averaging of multiple pumping calculation results.

10. The replaceable drainage bottle electric negative pressure drainage device according to claim 1, characterized in that, The main unit is equipped with an operation panel on its top, which includes indicator lights, a display, and buttons. The buttons include a power switch, a mode switch, and a rotary knob. The mode switch is used to switch between constant pressure mode and continuous drainage mode. In constant pressure mode, the main control board controls the pressure inside the drainage bottle to remain constant at a preset value. In the continuous drainage mode, an upper limit pressure and a lower limit pressure can be set. When the pressure inside the bottle is lower than the lower limit pressure, the main control board starts the vacuum pump to pump air to the upper limit pressure.

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