An automatic cleaning and waste liquid recycling device for a closed sputum suction tube

Abstract

This application relates to the field of medical device technology and discloses an automatic cleaning and waste liquid recovery device for a closed suction catheter. The device includes a housing, a connecting assembly, and a recovery assembly. The interior of the housing is divided into a storage chamber and a waste liquid recovery chamber by a fixedly connected partition. A sealing door is hinged to the outside of the waste liquid recovery chamber. The connecting assembly is mounted on the housing and is used to connect to the end of the closed suction catheter. The recovery assembly is located inside the waste liquid recovery chamber. Through the cooperation of a fixed heater, a triangular prism heater, and a driving component, the waste liquid recovery bag is automatically melted and sealed, achieving a good sealing effect. The recovery bag remains within a sealed space throughout the process, with no exposure during waste liquid collection, sealing, and disassembly, completely avoiding environmental and personnel pollution caused by waste liquid leakage and splashing. Simultaneously, when idle, the triangular prism heater can be attached to a heat-conducting plate to transfer heat to the flushing fluid in the storage chamber, preheating the flushing fluid and improving patient comfort.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an automatic cleaning and waste liquid recovery device for a closed suction catheter. Background Technology

[0002] In the field of medical device technology, closed suction catheters are key instruments for sputum suctioning of intubated patients in clinical departments such as intensive care and respiratory departments. Their matching automatic cleaning and waste liquid recovery devices are important equipment for automating the cleaning of suction catheters and standardizing waste liquid treatment. They can reduce manual operation steps, reduce the workload of medical staff, and at the same time have important clinical application value in avoiding cross-contamination in the medical environment and protecting the occupational safety of medical staff.

[0003] Existing closed suction catheter cleaning and waste liquid recovery devices generally include a liquid storage structure, a waste liquid collection structure, and a pipeline assembly connected to the suction catheter. Some devices are also equipped with auxiliary components such as heating and sealing. The whole device can realize basic functions such as storage and transportation of rinsing fluid, basic cleaning of the suction catheter, and collection and recovery of waste liquid. Some devices also have moving parts at the bottom to improve the flexibility of the device.

[0004] However, in actual use, the sealing operation of existing closed suction tube cleaning devices often requires manual assistance. During the sealing process, the recycling bag cannot be in a completely sealed space, which can easily lead to waste liquid leakage and splashing, causing pollution to the medical environment and medical staff. Therefore, an automatic cleaning and waste liquid recycling device for closed suction tubes is proposed to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an automatic cleaning and waste liquid recovery device for a closed suction tube, which solves the problem of waste liquid leakage and splashing that exist in the sealing operation of existing closed suction tube cleaning devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic cleaning and waste liquid recovery device for a closed suction catheter, comprising:

[0007] The outer shell is divided into a liquid storage chamber and a waste liquid recovery chamber by a fixedly connected partition. The outer side of the waste liquid recovery chamber is hinged with a sealing door.

[0008] A connecting component, which is disposed on the outer casing, is used to connect to the end of a closed suction tube;

[0009] The recycling assembly, located inside the waste liquid recycling chamber, includes a U-shaped shell, a fixed frame, a limiting frame, a fixed heater, and a triangular prism heater. The U-shaped shell is fixedly connected to the bottom of the waste liquid recycling chamber. A sealing plate is fixedly connected to the sealing door via a connecting rod. The fixed frame is fixedly connected to the waste liquid recycling chamber via a connecting plate. The limiting frame is installed in the waste liquid recycling chamber via a limiting component and is located above the fixed frame. The fixed heater is fixedly connected to the inner wall of the waste liquid recycling chamber. The triangular prism heater is located in the waste liquid recycling chamber, and its cross-section is triangular. A driving component for moving the triangular prism heater is provided on the outside of the triangular prism heater. A heat-conducting plate is embedded in and fixedly connected to the partition.

[0010] Preferably, the connecting components include a waste liquid recovery pipe and a flushing pipe, both of which are fixedly connected to the outer casing. The waste liquid recovery pipe and the flushing pipe are used to connect the waste liquid recovery chamber and the liquid storage chamber to the external space, respectively. A water pump is fixedly connected to the outside of the flushing pipe, and Luer locking connectors are fixedly connected to the top of both the waste liquid recovery pipe and the flushing pipe.

[0011] Preferably, the driving component includes a fixed cylinder, an electric push rod, and a heat insulation block. The fixed cylinder is fixedly connected to the partition plate, the electric push rod is fixedly connected to the fixed cylinder, the heat insulation block is fixedly connected to the moving end of the electric push rod, and the heat insulation block is fixedly connected to the outer wall of the triangular prism heater.

[0012] Preferably, the bottom of the outer casing is equipped with casters, and the bottom of the liquid storage chamber is fixedly connected with a temperature sensor.

[0013] Preferably, a heat-conducting rod is fixedly connected to the side of the heat-conducting plate near the liquid storage cavity.

[0014] Preferably, the limiting component includes a fixed side plate and a fixed slide rail. The fixed side plate is fixedly connected to the outside of the limiting frame, and the fixed side plate is slidably connected to the inner wall of the waste liquid recovery chamber through the fixed slide rail.

[0015] Preferably, the limiting component includes a guide side plate, a guide slide rail, a handle, and a magnetic plate. The guide side plate is fixedly connected to the outside of the limiting frame. The guide side plate is slidably connected to the inner wall of the waste liquid recovery chamber through the guide slide rail. The handle is fixedly connected to the limiting frame. The magnetic plate is fixedly connected to the top surface of the waste liquid recovery chamber. The upper surface of the limiting frame is made of iron material.

[0016] Preferably, the limiting component includes a movable plate, a U-shaped connecting frame, a fixed plate, and a lead screw. The movable plate is disposed in the liquid storage cavity, the U-shaped connecting frame is disposed on the outer shell, both ends of the U-shaped connecting frame penetrate the outer shell and are fixedly connected to the limiting frame and the movable plate, respectively, the fixed plate is fixedly connected to the U-shaped connecting frame, the lead screw is rotatably connected to the outer shell, and a knob is fixedly connected to the top of the lead screw through the fixed plate.

[0017] Preferably, a telescopic corrugated pipe is fixedly connected to the outside of the U-shaped connecting frame, and the bottom end of the telescopic corrugated pipe is fixedly connected to the upper surface of the outer shell.

[0018] Preferably, a weighing device is fixedly connected to the bottom of the waste liquid recovery chamber, and the weighing device is located inside the U-shaped shell.

[0019] This invention provides a closed-type automatic cleaning and waste liquid recovery device for suction catheters. It has the following beneficial effects:

[0020] 1. This invention achieves automatic melting and sealing of waste liquid recovery bags through the cooperation of a fixed heater, a triangular prism heater, and a driving component. The sealing effect is excellent, and the recovery bag is kept in a closed space throughout the entire process. There is no exposure during waste liquid collection, sealing, and disassembly, which completely avoids environmental and personnel pollution caused by waste liquid leakage and splashing. At the same time, when the triangular prism heater is not in use, it can be attached to the heat-conducting plate to transfer heat to the flushing fluid in the storage chamber, preheating the flushing fluid, improving patient comfort, avoiding irritation of the respiratory tract by low-temperature flushing fluid, and meeting the needs of humanized clinical operation. The triangular prism heater has a triangular cross-section design, and the contact area is suitable when it is attached to the fixed heater, resulting in high heating efficiency and fast melting and sealing speed, which can reduce energy waste.

[0021] 2. This invention achieves automatic extraction of rinsing fluid and automatic rinsing of the suction tube by combining a water pump, a rinsing pipe and a Luer locking connector, replacing manual operation and greatly improving cleaning efficiency. The waste liquid recovery pipe is connected to the discharge end of the suction tube and is set at a downward inclination. The waste liquid automatically flows into the recovery bag under the action of gravity, without the need for manual discharge, which greatly reduces the operation steps of medical staff.

[0022] 3. This invention designs three different limiting components to adapt to the fixing requirements of waste liquid recycling bags. The sliding limiting component relies on the slide rail to realize the up and down sliding of the limiting frame, and uses its own weight to complete the compression and limiting of the top of the recycling bag. The structure is simple and has strong stability. The magnetic limiting component is equipped with a handle and a magnetic plate. The lifting of the limiting frame can be fixed to the top of the chamber by magnetic attraction, which can quickly release the limit and greatly improve the convenience of recycling bag replacement. The screw-adjustable limiting component drives the limiting frame to rise and fall precisely by turning the screw with a knob. It can also link with the moving plate in the liquid storage chamber to stir the flushing liquid, so that the flushing liquid is heated more evenly. At the same time, the telescopic corrugated pipe can seal the penetration point to prevent flushing liquid leakage, which takes into account both the limiting accuracy and the sealing performance. Attached Figure Description

[0023] Figure 1 This is a perspective view of the entire invention;

[0024] Figure 2 This is a schematic diagram of the sealed door of the present invention after it has been opened;

[0025] Figure 3 This is a schematic diagram showing a partial cross-section of the present invention;

[0026] Figure 4 This is a schematic diagram showing a partial cross-section of Embodiment 2 of the present invention;

[0027] Figure 5 This is a schematic diagram of the interior from below after a cross-section view of Embodiment 2 of the present invention;

[0028] Figure 6 This is a schematic diagram showing a cross-section of three parts of an embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the limiting member in Embodiment 3 of the present invention.

[0030] The components include: 1. Outer shell; 2. Partition plate; 3. Liquid storage chamber; 4. Waste liquid recovery chamber; 5. Sealing door; 6. Connecting assembly; 61. Waste liquid recovery pipe; 62. Flushing pipe; 63. Water pump; 64. Luer locking joint; 7. Recovery assembly; 71. U-shaped shell; 72. Sealing plate; 73. Fixing frame; 74. Limiting frame; 75. Fixed heater; 76. Triangular prism heater; 77. Heat conducting plate; 8. Driving component; 81. Fixed cylinder; 82. Electric push rod; 83. Heat insulation block; 91. Fixed side plate; 92. Fixed slide rail; 101. Guide side plate; 102. Guide slide rail; 103. Handle; 104. Magnetic plate; 111. Moving plate; 112. U-shaped connecting frame; 113. Fixed plate; 114. Lead screw; 115. Telescopic corrugated pipe; 12. Weighing device; 13. Temperature sensor; 14. Heat conducting rod. Detailed Implementation

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1:

[0033] Please see the appendix Figure 1 - Appendix Figure 3This invention provides a closed-type automatic cleaning and waste liquid recovery device for suction catheters, including a housing 1, a connecting assembly 6, and a recovery assembly 7. The interior of the housing 1 is divided into a storage chamber 3 and a waste liquid recovery chamber 4 by a fixedly connected partition 2. The storage chamber 3 is used to store the rinsing fluid for cleaning the suction catheter, and the waste liquid recovery chamber 4 serves as the core space for waste liquid recovery, providing an installation and working environment for all waste liquid treatment-related components, and realizing a series of treatments such as waste liquid collection and melting sealing. The upper and lower ends of the right side of the storage chamber 3 are fixedly connected to an inlet pipe and an outlet pipe, respectively. The rinsing fluid can be added to the storage chamber 3 through the inlet pipe, and the rinsing fluid in the storage chamber 3 can also be discharged through the outlet pipe. The waste liquid is discharged to the waste liquid collection device. A sealing door 5 is hinged to the outside of the waste liquid recovery chamber 4, which seals the front end of the chamber. The sealing door 5 is also equipped with a lock, ensuring the airtightness of the waste liquid recovery chamber 4 when closed. A connecting component 6 is mounted on the outer shell 1 for connection to the end of the closed suction tube. Casters are installed at the bottom of the outer shell 1 to allow for flexible movement of the entire device, facilitating transfer to designated locations as needed. A weighing device 12 is fixedly connected to the bottom of the waste liquid recovery chamber 4. The weighing device 12 weighs the waste liquid placed in the recovery bag inside the U-shaped shell 71. The weighing device 12 is a high-precision medical pressure weighing device. The sensor, with a measurement range of 0-2kg and an accuracy of ±5g, is installed inside the bottom of the U-shaped housing 71 to directly detect the weight of the recycling bag. The weighing trigger threshold is 800g; upon reaching this threshold, a switch signal is sent to the controller. The recycling bag is made of medical-grade low-density polyethylene with a thickness of 0.08-0.1mm and a rated liquid capacity of 1000ml, corresponding to the 800g weighing threshold, with a 200g margin to prevent overflow. The bag opening flange width is 20mm to accommodate the fitting requirements of the fixing frame 73. When the waste liquid reaches the specified weight, a signal is sent to the external controller, triggering subsequent operations such as stopping rinsing and melting sealing. A temperature sensor is fixedly connected to the bottom of the liquid storage chamber 3. Sensor 13, temperature sensor 13 can detect the temperature of the flushing fluid inside the storage chamber 3 in real time, providing data support for the temperature control of the flushing fluid. All electrical components mentioned in this device can be controlled by an external controller. The controller is a medical PLC controller, model: Siemens S7-200SMART, safety level IP54. The wiring between each electrical component and the controller is medical shielded wire. The wiring method is as follows: water pump 63, electric push rod 82, fixed heater 75, triangular prism heater 76 are connected to the controller output terminal; weighing device 12 and temperature sensor 13 are connected to the controller input terminal; all wiring is equipped with medical insulated terminals to ensure electrical safety.

[0034] The recycling assembly 7 is located inside the waste liquid recycling chamber 4 and includes a U-shaped housing 71, a fixing frame 73, a limiting frame 74, a fixed heater 75, and a triangular prism heater 76. The U-shaped housing 71 is fixedly connected to the bottom of the waste liquid recycling chamber 4. The weighing device 12 is located inside the U-shaped housing 71. When the recycling bag is placed inside the U-shaped housing 71, the U-shaped housing 71 can support and limit the rear and left and right sides of the recycling bag. A sealing plate 72 is fixedly connected to the sealing door 5 via a connecting rod. When the sealing door 5 is closed, it can drive the sealing plate 72 to a position that fits against the front of the U-shaped housing 71, so that the sealing plate 72 can support the front of the recycling bag placed inside the U-shaped housing 71. At the same time, when the sealing door 5 is opened, it can drive the sealing plate 72 to a position that fits against the front of the U-shaped housing 71. Plate 72 quickly moves away, quickly releasing the limit on the recycling bag and facilitating the replacement of the recycling bag by staff. Fixed frame 73 is fixedly connected to waste liquid recycling chamber 4 by connecting plate. The top outer ring of fixed frame 73 is chamfered. Limiting frame 74 is installed in waste liquid recycling chamber 4 by limiting component and is located above fixed frame 73. The bottom of fixed frame 73 is chamfered to match the top of fixed frame 73. After the bottom of recycling bag is placed into U-shaped housing 71, the top of recycling bag can be turned outward and fitted onto fixed frame 73. Then, limiting frame 74 can be moved down to a position that can cooperate with fixed frame 73 to squeeze and limit the top of recycling bag. The sides of limiting frame 74 and fixed frame 73 that are close to each other are smooth.

[0035] A fixed heater 75 is fixedly connected to the inner wall of the waste liquid recovery chamber 4. A triangular prism heater 76 is disposed in the waste liquid recovery chamber 4, and the cross-section of the triangular prism heater 76 is triangular. The end of the triangular prism heater 76 near the fixed heater 75 is rounded, the side of the fixed heater 75 near the triangular prism heater 76 is rounded, and the side of the triangular prism heater 76 near the partition 2 is flat. A driving component 8 for moving the triangular prism heater 76 is disposed on the outer side of the triangular prism heater 76. A heat-conducting plate 77 is embedded and fixedly connected to the partition 2. The heat-conducting plate 77 is made of copper with a thermal conductivity of 401 W / (m·K), high heat transfer efficiency, and a thickness of 8 mm. It is embedded in the partition 2 and sealed with a medical silicone sealing ring to prevent the liquid storage chamber 3 from... The waste liquid recovery chamber contains 4 streams of liquid. A heat-conducting plate 77 is fixedly connected to a heat-conducting rod 14 on the side near the liquid storage chamber 3. The heat-conducting rod 14 is made of aluminum alloy with a thermal conductivity of 237 W / (m·K), balancing thermal conductivity and lightweight. It has a diameter of 6 mm. The heat-conducting rods 14 are arranged in a ring array on the side of the heat-conducting plate 77 near the liquid storage chamber 3, with a total of 12 rods. There are 4 rods in the inner ring, with the center of the ring 20 mm from the edge of the heat-conducting plate 77, and 8 rods in the outer ring, with the center of the ring 40 mm from the edge of the heat-conducting plate 77. Each heat-conducting rod 14 is 50 mm long and is completely immersed in the rinsing liquid to maximize the heat transfer area and ensure uniform heating of the rinsing liquid. When the triangular prism heater 76 moves to the right under the drive of the drive component 8, it can move to a position that fits against the heat-conducting plate 77. When the triangular prism heater 76 moves to the left, it can move to a position that fits against the fixed heater 75.

[0036] Both the fixed heater 75 and the triangular prism heater 76 use medical-grade PTC heating elements, with a temperature resistance of 200℃ and an insulation class of Class B. The fixed heater 75 has a power of 80W and a heating area size of 50mm × 30mm; the triangular prism heater 76 has a power of 60W, a right-angled side of a triangular cross-section of 40mm, a radius of curvature of 5mm, and a heating operating temperature of 160±5℃. It is suitable for melting and sealing medical PE waste liquid recycling bags to prevent burn-through or poor sealing. The compressive force of the drive component pushing the triangular prism heater 76 to adhere to the fixed heater 75 is 80±10N, and the pressure holding heating time for melting and sealing is 3±0.5s. When the triangular prism heater 76 is attached to the heat-conducting plate 77, it is a pressureless attachment, only surface contact is required, so as to achieve efficient heat transfer. The fixed heater 75 and the triangular prism heater 76 start / stop synchronously. The temperature sensor 13 detects the temperature of the flushing fluid. When the temperature of the flushing fluid is ≤36℃, the controller controls the heater to keep working. When the temperature of the flushing fluid is ≥38℃, the controller controls the heater to stop working, so as to achieve constant temperature preheating of the flushing fluid. The temperature of 36-38℃ is in line with the clinical human comfort temperature. When the heater is working, the heat insulation block 83 is made of high temperature resistant silicone material with a thermal conductivity of ≤0.2W / (m・K), which completely blocks the heat transfer to the electric push rod 82.

[0037] The connecting assembly 6 includes a waste liquid recovery pipe 61 and a flushing pipe 62, both of which are fixedly connected to the outer shell 1. The waste liquid recovery pipe 61 is located directly above the U-shaped shell 71. The waste liquid recovery pipe 61 and the flushing pipe 62 are used to connect the waste liquid recovery chamber 4 and the storage chamber 3 to the external space, respectively. A water pump 63 is fixedly connected to the outside of the flushing pipe 62. Luer locking connectors 64 are fixedly connected to the top ends of both the waste liquid recovery pipe 61 and the flushing pipe 62. The locking connector 64 can be connected to the flushing end and the draining end of the closed suction tube respectively. The top of the waste liquid recovery tube 61 is lower than the top of the flushing tube 62. After the connection is completed, the closed suction tube can be set in a downward tilting position at the draining end. When the water pump 63 is started, the flushing fluid can be drawn upward through the flushing tube 62 into the closed suction tube to complete the automatic flushing function. The waste liquid in the closed suction tube will reach the waste liquid recovery tube 61 under the action of gravity and be discharged downward, so that the waste liquid can finally enter the recovery bag for collection.

[0038] When the waste liquid in the recycling bag reaches the specified weight, the weighing device 12 sends a signal to the external controller to stop the water pump 63. After a period of time, when the waste liquid in the closed suction tube is completely discharged into the recycling bag, the controller can start the drive component 8 to move the triangular prism heater 76 to the left. This allows the triangular prism heater 76 to cooperate with the fixed heater 75 to melt and seal the recycling bag. When the triangular prism heater 76 moves to the left, it will squeeze the recycling bag. Since the bottom of the recycling bag contains waste liquid, it will not move. The top of the recycling bag can be pulled down along the smooth surfaces of the limiting frame 74 and the fixed frame 73. After sealing is completed, the sealing door 5 is opened, and the sealing plate 72 is moved away from the U-shaped housing 71, which releases the limitation on the recycling bag, allowing the staff to quickly take out the recycling bag.

[0039] The driving component 8 includes a fixed cylinder 81, an electric push rod 82, and a heat insulation block 83. The fixed cylinder 81 is fixedly connected to the partition plate 2, and the electric push rod 82 is fixedly connected to the fixed cylinder 81. The electric push rod 82 is a medical miniature electric push rod with a rated thrust of 100N and an effective stroke of 500mm. It realizes the reciprocating movement of the triangular prism heater 76 between the heat-conducting plate 77 and the fixed heater 75. The extension speed is 30mm / s, and the working voltage is 24V. The heat insulation block 83 is fixedly connected to the moving end of the electric push rod 82 and is fixedly connected to the outer wall of the triangular prism heater 76. The electric push rod 82 can drive the heat insulation block 83 and the triangular prism heater 76 to move left and right through extension and retraction, so as to achieve the contact between the triangular prism heater 76 and the fixed heater 75 or the heat-conducting plate 77. The heat insulation block 83 can block the heat of the triangular prism heater 76 from being transferred to the electric push rod 82, preventing the electric push rod 82 from being damaged due to high temperature.

[0040] The extension and retraction of the electric push rod 82 is triggered by the signal of the weighing device 12. After the weighing device detects that the weight of the waste liquid reaches 800g, the controller first stops the water pump 63 and delays for 5 seconds to ensure that the residual waste liquid in the suction tube completely flows into the recycling bag. Then, the controller controls the electric push rod 82 to extend, pushing the triangular prism heater 76 to move towards the fixed heater 75, reaching the fitting position and holding the pressure for 3 seconds. After the melting and sealing is completed, the controller controls the electric push rod 82 to retract immediately and return to the position of fitting with the heat-conducting plate 77.

[0041] The limiting component includes a fixed side plate 91 and a fixed slide rail 92. The fixed side plate 91 is fixedly connected to the outside of the limiting frame 74, and the fixed side plate 91 is slidably connected to the inner wall of the waste liquid recovery chamber 4 via the fixed slide rail 92. The fixed slide rail 92 is a medical-grade silent linear slide rail with sliding damping ≤0.5N, ensuring that the limiting frame 74 can slide smoothly under its own weight. The fixed side plate 91 is made of ABS medical-grade material with a thickness of 5mm and is integrally formed with the limiting frame 74. The limiting frame 74 has an overall weight of 200g, achieving flexible compression of the recovery bag. The limiting mechanism prevents bag opening deformation due to additional pressure. The fixed slide rail 92 guides and limits the movement of the fixed side plate 91 and the limiting frame 74, allowing the limiting frame 74 to move only in a straight line in the up and down direction. When the limiting frame 74 moves down to fit against the outward-folded position of the recycling bag, it can use its own weight to limit the end of the recycling bag, improving the stability of the recycling bag. The squeezing force on the recycling bag is the weight of the limiting frame 74 (200g), achieving flexible limiting without additional pressure, ensuring that the recycling bag can be pulled down smoothly when sealed.

[0042] The controller's full-process automated timing logic:

[0043] I. Device Start-up: Controller initialization, triangular prism heater 76 starts to preheat the flushing liquid, temperature sensor 13 provides real-time feedback, water pump 63 is on standby, and electric push rod 82 is reset.

[0044] II. Cleaning stage: Water pump 63 starts, the rinsing fluid is delivered to the suction tube, the waste liquid flows into the recycling bag, and the weighing device 12 weighs in real time;

[0045] 3. Triggering the seal: When the weight reaches 800g, the controller stops the water pump 63, delays for 5s to allow the waste liquid to be discharged, starts the fixed heater 75 and the triangular prism heater 76, the electric push rod 82 extends, and the pressure seal lasts for 3s.

[0046] IV. Sealing complete: Fixed heater 75 and triangular prism heater 76 are turned off → electric push rod 82 retracts and resets → device stands by, waiting for manual replacement of recycling bag;

[0047] V. Abnormal Protection: When the temperature sensor 13 detects that the flushing fluid temperature is >40℃, the controller will forcibly shut down the fixed heater 75 and the triangular prism heater 76; when the weighing device 12 detects that the weight is >900g, the controller will issue an audible and visual alarm and forcibly stop all operations.

[0048] Working principle: First, flushing fluid is added to the storage chamber 3 through the inlet pipe to complete the flushing fluid reserve. The waste liquid recovery bag is placed into the U-shaped shell 71 in the waste liquid recovery chamber 4. The U-shaped shell 71 provides support and limit on the rear and left and right sides of the recovery bag. Then, the top of the recovery bag is turned outward and fitted onto the fixed frame 73. The limiting frame 74 slides down along the fixed slide rail 92 through the fixed side plate 91 until it fits against the fixed frame 73. The weight of the limiting frame 74 forms a compression limit on the top of the recovery bag fitted onto the fixed frame 73. The contact surface between the limiting frame 74 and the fixed frame 73 is a smooth surface to ensure that the recovery bag can be pulled smoothly during the subsequent melting and sealing.

[0049] Next, the sealing door 5 is closed, and the sealing door 5 moves the sealing plate 72 to fit against the front of the U-shaped shell 71, forming a support limit on the front side of the collection bag. At the same time, the sealing door 5 is locked by the door lock to complete the sealing of the waste liquid collection chamber 4. The two Luer locking joints 64 of the connecting component 6 are connected to the flushing end and the draining end of the closed suction tube respectively. The top of the waste liquid collection tube 61 is lower than the top of the flushing tube 62, so that the draining end of the suction tube is tilted downward. After the connection is completed, the device is started by the external controller. The temperature sensor 13 monitors the temperature of the flushing fluid in the storage chamber 3 in real time to provide data support for temperature control. The weighing device 12 is in working condition and monitors the weight of the waste liquid in the collection bag in the U-shaped shell 71 in real time.

[0050] An external controller starts the water pump 63, which draws flushing fluid from the storage chamber 3 through the flushing pipe 62. The flushing fluid enters the sealed suction tube through the Luer locking connector 64, completing the automatic flushing operation of the suction tube. Under the action of gravity, the flushing waste fluid in the suction tube flows from the discharge end of the suction tube through the Luer locking connector 64 into the waste fluid recovery pipe 61. The waste fluid is discharged downward along the waste fluid recovery pipe 61 and finally enters the recovery bag in the waste fluid recovery chamber 4, realizing the automatic collection of waste fluid. Under the initial drive of the drive component 8, the triangular prism heater 76 is in contact with the heat-conducting plate 77 embedded in the partition 2. The heat generated by the triangular prism heater 76 is transferred to the heat-conducting rod 14 through the heat-conducting plate 77. The heat-conducting rod 14 disperses the heat into the flushing fluid in the storage chamber 3 to preheat the flushing fluid. The heat insulation block 83 blocks the heat of the triangular prism heater 76 from being transferred to the electric push rod 82, preventing the electric push rod 82 from being damaged due to high temperature.

[0051] When the weight of the waste liquid in the collection bag reaches the specified value, the weighing device 12 sends a signal to the external controller. The controller immediately stops the water pump 63, terminates the delivery of the flushing fluid, and stops the cleaning operation of the suction tube. The controller reserves a set time to allow the residual waste liquid in the suction tube to be completely discharged under gravity and flow into the collection bag through the waste liquid collection pipe 61, ensuring that there is no waste liquid residue. After the preset time is over, the controller starts the electric push rod 82 of the drive component 8. The electric push rod 82 extends outward in the fixed cylinder 81 and pushes the heat insulation block 83 to move the triangular prism heater 76 to the left until the triangular prism heater 76 is tightly attached to the fixed heater 75 on the inner wall of the waste liquid collection chamber 4. The fixed heater 75 and the triangular prism heater 76 work synchronously to generate high temperature, which melts and seals the collection bag at the joint. During the melting and sealing process, the triangular prism heater 76 squeezes the collection bag. The bottom of the collection bag remains fixed due to the waste liquid, while the top is pulled downward along the smooth surface of the limit frame 74 and the fixed frame 73, ensuring the sealing and integrity of the melting seal.

[0052] After the recycling bag is melt-sealed, the fixed heater 75 and the triangular prism heater 76 are turned off. The electric push rod 82 retracts, causing the triangular prism heater 76 to reset and re-fit with the heat-conducting plate 77. The lock of the sealing door 5 is opened, and the sealing door 5 is opened outward. The sealing door 5 drives the sealing plate 72 to move away from the U-shaped housing 71 through the connecting rod, releasing the restriction on the front side of the recycling bag. The limit frame 74 is pushed upward, causing the limit frame 74 to separate from the fixed frame 73, releasing the squeezing restriction on the top of the recycling bag. The staff can directly take out the sealed waste liquid recycling bag from the U-shaped housing 71, put in a new waste liquid recycling bag, and repeat the operation of the previous preparation stage to start the next round of automatic cleaning of the suction tube and waste liquid recycling operation. The flushing fluid in the storage chamber 3 can be discharged through the outlet pipe to complete the flushing fluid replacement.

[0053] Example 2:

[0054] Please see the appendix Figure 4 - Appendix Figure 5 The difference between this embodiment and embodiment one is that a different limiting component is used. The limiting component includes a guide side plate 101, a guide slide rail 102, a handle 103, and a magnetic plate 104. The guide side plate 101 is fixedly connected to the outside of the limiting frame 74. The guide side plate 101 is slidably connected to the inner wall of the waste liquid recovery chamber 4 through the guide slide rail 102, which can guide and limit the limiting frame 74 to ensure its vertical linear movement. The handle 103 is fixedly connected to the limiting frame 74, which is convenient for workers to manually lift or lower the limiting frame 74. The magnetic plate 104 is fixedly connected to the top surface of the waste liquid recovery chamber 4. The upper surface of the limiting frame 74 is made of iron material. The magnetic plate 104 can use magnetic force to attract the iron material on the upper surface of the limiting frame 74, which can attract and fix the limiting frame 74 to the top of the waste liquid recovery chamber 4, which is convenient for attaching and replacing the recycling bag.

[0055] The magnetic plate 104 is a permanent magnet ferrite magnetic plate with dimensions of 50mm×30mm×5mm and a surface magnetic force of 1.5kgf. It can stably adsorb the limiting frame 74, and the adsorption can be easily lifted and released manually. The iron material on the upper surface of the limiting frame 74 is a thin sheet of iron with a thickness of 0.5mm, which is bonded and fixed to the limiting frame 74. The size of the iron area is perfectly matched with the magnetic plate 104. The sliding damping of the guide rail 102 is ≤0.5N, ensuring that the limiting frame 74 slides smoothly up and down.

[0056] The beneficial effects of Example 2: Based on Example 1, when the recycling bag needs to be replaced, manually hold the handle 103 and pull the limiting frame 74 upward. The limiting frame 74 drives the guide side plate 101 to slide upward along the guide slide rail 102 until the iron material on the upper surface of the limiting frame 74 is attracted and attached to the magnetic plate 104 on the top surface of the waste liquid recycling chamber 4. The magnetic plate 104 attracts and fixes the limiting frame 74 to the top of the waste liquid recycling chamber 4, releasing the squeezing and limiting of the top of the recycling bag. The staff can directly take out the sealed waste liquid recycling bag from the U-shaped shell 71.

[0057] Place a new waste fluid collection bag in the tubing, manually hold handle 103 and pull down the limiting frame 74 to make it fit with the fixing frame 73. Repeat the remaining operations of the previous preparation stage to start the next round of automatic cleaning and waste fluid collection of the suction tube. The flushing fluid in the storage chamber 3 can be discharged through the outlet tube to complete the flushing fluid replacement.

[0058] Example 3:

[0059] Please see the appendix Figure 6 - Appendix Figure 7The difference between this third embodiment and the first embodiment lies in the replacement of a different limiting component. The limiting component includes a movable plate 111, a U-shaped connecting frame 112, a fixed plate 113, and a lead screw 114. The movable plate 111 is disposed in the liquid storage chamber 3. When the movable plate 111 moves up and down, it can agitate the flushing liquid inside the liquid storage chamber 3, making the heating of the flushing liquid by the triangular prism heater 76 more uniform. The U-shaped connecting frame 112 is disposed on the outer shell 1, with both ends of the U-shaped connecting frame 112 penetrating the outer shell 1 and fixedly connected to the limiting frame 74 and the movable plate 111, respectively. The fixed plate 113 is fixedly connected to the U-shaped connecting frame 112. The lead screw 114 is rotatably connected to the outer shell 1, with its top end penetrating the fixed plate 113. A knob is fixedly connected to the screw 114. A threaded sleeve is threadedly connected to the screw 114 at the point where it passes through the fixed plate 113. The threaded sleeve is fixedly connected to the fixed plate 113. The screw 114 can be manually rotated by the knob, which in turn drives the fixed plate 113 to move up and down using the threaded transmission. This provides power for the movement of the limit frame 74 and the moving plate 111, enabling the precise lifting and fixing of the limit frame 74. A telescopic bellows 115 is fixedly connected to the outside of the U-shaped connecting frame 112. The bottom end of the telescopic bellows 115 is fixedly connected to the upper surface of the outer shell 1. The telescopic bellows 115 can seal the point where the U-shaped connecting frame 112 passes through the outer shell 1, preventing the flushing fluid in the liquid storage chamber 3 from leaking out, while not affecting the up and down movement of the U-shaped connecting frame 112.

[0060] The lead screw 114 is a fine-pitch precision lead screw with a pitch of 2mm. The knob is a non-slip rubber knob. One rotation can raise and lower the limit frame 74 by 2mm, with an adjustment accuracy of 2mm, which meets the requirements for precise limit positioning. The telescopic corrugated tube 115 is a medical-grade silicone corrugated tube with a temperature resistance of -40℃ to 200℃. The connection between the two ends and the U-shaped connecting frame 112 and the outer shell 1 is a stainless steel clamp for sealing and fixing, with a sealing rating of IP67, which completely prevents the flushing fluid from leaking. The moving plate 111 is a circular ABS plate with a diameter of 60mm and a thickness of 3mm. Four through holes with a diameter of 10mm are opened on the plate. The vertical movement is 50mm, which agitates the flushing fluid to achieve uniform heating.

[0061] The beneficial effects of Example 3: Based on Example 1, after the top of the recycling bag is turned outward and fitted onto the fixed frame 73, the knob at the top of the lead screw 114 is rotated. The lead screw 114 rotates on the outer shell 1, driving the fixed plate 113 to move downward through the threaded transmission. The fixed plate 113 drives the U-shaped connecting frame 112 to move downward synchronously. The two ends of the U-shaped connecting frame 112 respectively drive the limiting frame 74 and the moving plate 111 to move downward. The limiting frame 74 moves downward to fit against the fixed frame 73, forming a squeezing limit on the top of the recycling bag fitted onto the fixed frame 73. The moving plate 111 moves downward to initially agitate the flushing liquid in the storage chamber 3. The telescopic corrugated pipe 115 on the outside of the U-shaped connecting frame 112 moves telescopically with the downward movement of the U-shaped connecting frame 112, always sealing the penetration between the U-shaped connecting frame 112 and the outer shell 1, preventing the flushing liquid in the storage chamber 3 from leaking.

[0062] When the recycling bag needs to be replaced, open the lock of the sealing door 5 and open the sealing door 5 outward. The sealing door 5 drives the sealing plate 72 to move away from the U-shaped housing 71 through the connecting rod, releasing the restriction on the front side of the recycling bag. Turn the knob at the top of the screw 114 in the opposite direction. The screw 114 drives the fixing plate 113 to move upward through the threaded transmission. The fixing plate 113 drives the U-shaped connecting frame 112 to move upward simultaneously. The U-shaped connecting frame 112 drives the limiting frame 74 to move upward, so that the limiting frame 74 separates from the fixing frame 73, releasing the compression restriction on the top of the recycling bag. At the same time, the U-shaped connecting frame 112 drives the moving plate 111 to move upward. The telescopic corrugated pipe 115 moves upward with the U-shaped connecting frame 112 and performs telescopic movement to maintain the sealing effect.

[0063] The staff can directly remove the sealed waste liquid recycling bag from the U-shaped housing 71, put in a new waste liquid recycling bag, and turn the knob of the screw 114 forward to move the limit frame 74 down to fit with the fixed frame 73. The top of the new recycling bag is squeezed and limited again. Repeat the subsequent sealing, connecting the suction tube and other operations to start the next round of automatic cleaning of the suction tube and waste liquid recycling operation. The flushing fluid in the liquid storage chamber 3 can be discharged through the liquid outlet to complete the replacement of the flushing fluid.

[0064] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A closed-type automatic cleaning and waste liquid recovery device for suction tubes, characterized in that, include: The outer shell (1) is divided into a liquid storage chamber (3) and a waste liquid recovery chamber (4) by a fixedly connected partition (2). A sealing door (5) is hinged to the outside of the waste liquid recovery chamber (4). A connecting component (6) is disposed on the outer casing (1) and is used to connect to the end of a closed suction tube; The recycling assembly (7) is located inside the waste liquid recycling chamber (4) and includes a U-shaped shell (71), a fixing frame (73), a limiting frame (74), a fixed heater (75), and a triangular prism heater (76). The U-shaped shell (71) is fixedly connected to the bottom of the waste liquid recycling chamber (4). A sealing plate (72) is fixedly connected to the sealing door (5) via a connecting rod. The fixing frame (73) is fixedly connected to the waste liquid recycling chamber (4) via a connecting plate. The limiting frame (74) is fixedly connected to the waste liquid recycling chamber (4) via a limiting plate. The component is installed in the waste liquid recovery chamber (4) and located above the fixed frame (73). The fixed heater (75) is fixedly connected to the inner wall of the waste liquid recovery chamber (4). The triangular prism heater (76) is set in the waste liquid recovery chamber (4), and the cross-section of the triangular prism heater (76) is triangular. The outer side of the triangular prism heater (76) is provided with a driving component (8) for moving the triangular prism heater (76). A heat-conducting plate (77) is embedded and fixedly connected to the partition plate (2).

2. The closed-type automatic cleaning and waste liquid recovery device for suction tubes according to claim 1, characterized in that, The connecting assembly (6) includes a waste liquid recovery pipe (61) and a flushing pipe (62). The waste liquid recovery pipe (61) and the flushing pipe (62) are both fixedly connected to the outer shell (1). The waste liquid recovery pipe (61) and the flushing pipe (62) are used to connect the waste liquid recovery chamber (4) and the liquid storage chamber (3) to the external space, respectively. A water pump (63) is fixedly connected to the outside of the flushing pipe (62). Luer locking connectors (64) are fixedly connected to the top of the waste liquid recovery pipe (61) and the flushing pipe (62).

3. The closed-type automatic cleaning and waste liquid recovery device for suction tubes according to claim 1, characterized in that, The driving component (8) includes a fixed cylinder (81), an electric push rod (82), and a heat insulation block (83). The fixed cylinder (81) is fixedly connected to the partition plate (2), the electric push rod (82) is fixedly connected in the fixed cylinder (81), the heat insulation block (83) is fixedly connected to the moving end of the electric push rod (82), and the heat insulation block (83) is fixedly connected to the outer wall of the triangular prism heater (76).

4. The automatic cleaning and waste liquid recovery device for a closed suction tube according to claim 1, characterized in that, The bottom of the outer shell (1) is equipped with casters, and the bottom of the liquid storage chamber (3) is fixedly connected with a temperature sensor (13).

5. The closed-type automatic cleaning and waste liquid recovery device for suction tubes according to claim 1, characterized in that, A heat-conducting rod (14) is fixedly connected to the side of the heat-conducting plate (77) near the liquid storage chamber (3).

6. The closed-type automatic cleaning and waste liquid recovery device for suction tubes according to claim 1, characterized in that, The limiting component includes a fixed side plate (91) and a fixed slide rail (92). The fixed side plate (91) is fixedly connected to the outside of the limiting frame (74), and the fixed side plate (91) is slidably connected to the inner wall of the waste liquid recovery chamber (4) through the fixed slide rail (92).

7. The closed-type automatic cleaning and waste liquid recovery device for suction tubes according to claim 1, characterized in that, The limiting component includes a guide side plate (101), a guide slide rail (102), a handle (103), and a magnetic plate (104). The guide side plate (101) is fixedly connected to the outside of the limiting frame (74). The guide side plate (101) is slidably connected to the inner wall of the waste liquid recovery chamber (4) through the guide slide rail (102). The handle (103) is fixedly connected to the limiting frame (74). The magnetic plate (104) is fixedly connected to the top surface of the waste liquid recovery chamber (4). The upper surface of the limiting frame (74) is made of iron material.

8. The automatic cleaning and waste liquid recovery device for a closed suction tube according to claim 1, characterized in that, The limiting component includes a movable plate (111), a U-shaped connecting frame (112), a fixed plate (113), and a lead screw (114). The movable plate (111) is disposed in the liquid storage cavity (3). The U-shaped connecting frame (112) is disposed on the outer shell (1). Both ends of the U-shaped connecting frame (112) penetrate the outer shell (1) and are fixedly connected to the limiting frame (74) and the movable plate (111) respectively. The fixed plate (113) is fixedly connected to the U-shaped connecting frame (112). The lead screw (114) is rotatably connected to the outer shell (1). The top end of the lead screw (114) is fixedly connected to a knob through the fixed plate (113).

9. The closed-type automatic cleaning and waste liquid recovery device for suction tubes according to claim 8, characterized in that, The U-shaped connecting frame (112) is fixedly connected to a telescopic corrugated pipe (115) on the outside, and the bottom end of the telescopic corrugated pipe (115) is fixedly connected to the upper surface of the outer shell (1).

10. The automatic cleaning and waste liquid recovery device for a closed suction tube according to claim 1, characterized in that, A weighing device (12) is fixedly connected to the bottom of the waste liquid recovery chamber (4), and the weighing device (12) is located inside the U-shaped shell (71).

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