Transfusion device with automatic liquid medicine switching function
By introducing a combination of a drug placement rack, hanging plate and hook structure, solenoid valve and drug sensor into the infusion device, the problems of automatic switching and liquid level monitoring in existing infusion devices are solved, realizing automatic switching and real-time monitoring of drug solutions, and improving the stability and adaptability of the device.
Patent Information
- Application Number
- CN202511475765.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2025-11-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing infusion devices lack automatic drug switching functions, cannot monitor the liquid level in real time, pose a risk of infusion interruption, have poor structural stability, and do not consider the need for drug heating, affecting user comfort and safety.
An infusion device with automatic drug switching function was designed. The drug bag is stably suspended through a drug placement rack, hanging plate and hook structure. Automatic switching and real-time monitoring are achieved by combining solenoid valve and drug sensor. A heating device is set to regulate the drug temperature. The counterweight component improves the stability of the device. The counterweight block with flexible rubber material is used to prevent tilting. Universal wheels ensure the flexibility of movement.
It enables automatic switching and real-time monitoring of the infusion solution, avoiding infusion interruptions and leakage, ensuring the appropriate temperature of the infusion solution, and improving the automation level and adaptability of the infusion device in different scenarios.
Smart Images
Figure CN121016016A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical infusion technology, and in particular to an infusion device with an automatic drug switching function. Background Technology
[0002] Intravenous infusion therapy is one of the most common treatment methods in modern clinical medicine. It refers to the direct infusion of drugs, nutritional solutions or other therapeutic fluids into the human body through veins, making it an extremely common and important treatment method in modern medicine. It is widely used in the process of fluid replenishment, nutritional supply and drug infusion for various diseases.
[0003] Infusion devices are widely used in medical institutions such as hospitals and clinics to deliver liquids (such as glucose, saline, and drugs) into the patient's body via intravenous infusion. This makes infusion devices a widely used basic medical tool. Infusion devices use gravity to allow the liquid to flow into the body along the infusion tube under the action of pressure difference. Doctors or nurses will observe the flow rate of the medication through the drip chamber and adjust the flow rate using roller clamps.
[0004] However, existing infusion devices lack the function of automatically switching medications, requiring manual replacement of medication bags. They also lack a real-time medication monitoring mechanism, making it impossible to automatically detect the fluid level and posing a risk of infusion interruption. This increases the operational burden and the risk of infusion interruption. In addition, most existing infusion devices do not consider the need for medication warming, and low-temperature infusion may irritate the patient's blood vessels, affecting the comfort of using the infusion device. Furthermore, existing infusion devices have poor structural stability and weak anti-shaking ability, making them unsuitable for use in scenarios with multiple medication bags or mobile settings. Therefore, this paper proposes an infusion device with an automatic medication switching function to overcome the above-mentioned defects. Summary of the Invention
[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an infusion device with an automatic drug switching function.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: an infusion device with automatic drug switching function, comprising a drug placement rack, a plurality of drug bags being provided at the top of the drug placement rack, an infusion assembly being provided at the bottom of the drug bags, an auxiliary assembly being provided in the middle of the drug placement rack, and the auxiliary assembly cooperating with the infusion assembly, and a plurality of counterweights being provided at the bottom of the drug placement rack.
[0007] As a further description of the above technical solution: the medicine placement rack includes a frame body disposed on one side of the infusion assembly. A hanging plate is provided on the top of the frame body, and a hook is provided on the bottom of the hanging plate, with the hook cooperating with the medicine bag. Several mounting blocks are provided in the middle of the frame body, and mounting holes are provided in the middle of the mounting blocks, with the mounting holes cooperating with auxiliary components. The medicine placement rack also includes a movable plate disposed at the bottom of the frame body. Several insertion slots are provided on the top of the movable plate, and a limit frame is provided inside the insertion slot, with the limit frame cooperating with a counterweight assembly. Several casters are provided at the bottom of the movable plate. By setting up the hanging plate and hooks, the weight of the medicine bag can be evenly distributed, ensuring the stability of the medicine bag suspension and preventing the hooks from falling off. The mounting blocks and mounting holes facilitate the connection between the auxiliary components and other parts of the medicine placement rack, making the cooperation between components simpler and more flexible.
[0008] As a further description of the above technical solution: the top of the medicine bag is provided with a placement frame, and the placement frame cooperates with a hook; the bottom of the medicine bag is provided with a liquid outlet tube, and the liquid outlet tube is connected to the infusion assembly; the top of the liquid outlet tube is provided with a solenoid valve and a liquid sensor, and the solenoid valve and the liquid sensor cooperate with the medicine bag. By setting the solenoid valve and the liquid sensor, automatic switching and real-time monitoring during the infusion process are realized, improving the degree of automation and reducing human error. At the same time, the flow of liquid is controlled by the solenoid valve to prevent liquid leakage or infusion errors, and the liquid sensor can monitor the liquid volume and infusion status in real time to ensure safety.
[0009] As a further description of the above technical solution: the infusion assembly includes a collection tube disposed at the bottom of the outlet tube, a plurality of connecting tubes disposed at the top of the collection tube, the connecting tubes cooperating with the outlet tube, a one-way air valve disposed at the top of the connecting tubes, an infusion tube disposed at the bottom of the collection tube, a flow rate control component disposed on the outside of the infusion tube, and an infusion needle disposed at the bottom of the infusion tube. By setting the flow rate control component, the infusion flow rate can be adjusted to ensure that the speed of drug delivery meets the patient's needs and avoids the problem of infusion being too fast or too slow. The design of the one-way air valve prevents the drug from flowing back and prevents gas from entering the infusion tube, ensuring that the drug is not contaminated or wasted due to backflow during the infusion process.
[0010] As a further description of the above technical solution: the auxiliary component includes an insertion rod inserted into the mounting hole, one end of the insertion rod having a limiting block, and the other end having a placement rod. The auxiliary component also includes a placement plate on top of the placement rod, the bottom of the placement plate having a placement groove that cooperates with the placement rod, one end of the placement plate having a snap-fit groove that cooperates with the infusion tube, and the top of the placement plate having a heating device that cooperates with the infusion tube. By setting the insertion rod and the limiting block, the precise cooperation between the auxiliary component and other components is ensured, ensuring that each component works in the appropriate position. The heating device of the placement plate can regulate the temperature of the medication, preventing the medication from becoming too cold and ensuring that the medication does not cause discomfort to the patient during delivery.
[0011] As a further description of the above technical solution: the counterweight assembly includes a placement block disposed inside the insertion slot, and the placement block cooperates with the limiting frame. A handle is provided on the top of the placement block, and a counterweight is provided on the bottom of the placement block. Several limiting grooves are opened on the bottom of the counterweight. The counterweight cooperates with the insertion slot, and the counterweight is made of flexible rubber. By setting the counterweight and using flexible rubber, the counterweight of the infusion device can be adjusted within a certain range, improving the stability of the device and preventing tilting due to imbalance. The design of the placement block simplifies the placement and removal of the counterweight, ensuring that the center of gravity of the device can be easily adjusted to meet the needs of different usage scenarios.
[0012] The present invention has the following beneficial effects: This invention relates to an infusion device with an automatic drug switching function. Multiple drug bags are placed on the top of a drug placement rack, and a hanging plate and hook structure ensure stable suspension of the drug bags, preventing them from falling and evenly distributing the load. The bottom of each drug bag is connected to the infusion assembly via an outlet pipe. The outlet pipe contains an embedded solenoid valve and a drug sensor. The solenoid valve precisely controls the drug flow, and the sensor detects the liquid level and monitors the status, thereby enabling automatic switching between multiple drug bags and ensuring infusion safety. This prevents drug leakage and human error. Simultaneously, the infusion assembly contains a main pipe and several connecting pipes to form a liquid confluence channel. A top one-way air valve prevents drug backflow and effectively blocks air from entering, improving the purity and safety of the infusion.
[0013] This invention relates to an infusion device with an automatic medication switching function. A flow rate control component is connected to the infusion tubing at the lower end of the main tube to adjust the infusion rate, ensuring the medication delivery rate meets the patient's needs. An infusion needle is positioned at the bottom of the tubing to directly administer medication. A mounting block and mounting holes in the middle of the medication holder are used for the insertion and fixation of auxiliary components. A placement slot and a snap-fit slot ensure a secure fit with the infusion tubing. A heating device controls the medication temperature to prevent discomfort caused by low temperatures. A counterweight component at the bottom of the medication holder includes a flexible rubber counterweight block. A stable base is constructed using a limiting frame and insertion slot. A limiting groove under the counterweight block prevents positional displacement. A top handle facilitates disassembly and replacement, and casters provide flexibility for deployment and adjustment in different scenarios, ensuring the infusion device possesses a high degree of automation, reliability, and on-site adaptability. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 4 This is a cross-sectional view of the medicine liquid placement rack structure in this invention; Figure 5 This is a partial three-dimensional structural schematic diagram of the present invention; Figure 6 This is a schematic diagram of the drug bag structure in this invention; Figure 7 yes Figure 5 Enlarged schematic diagram of a local structure at point A; Figure 8 This is a three-dimensional schematic diagram of the auxiliary component structure in this invention; Figure 9 This is a schematic diagram of the counterweight component structure in this invention.
[0015] Legend: 1. Medication rack; 11. Rack body; 12. Hanging plate; 13. Hook; 14. Mounting block; 15. Mounting hole; 16. Moving plate; 17. Insertion slot; 18. Limiting frame; 19. Casters; 2. Medication bag; 21. Placement frame; 22. Discharge tube; 23. Solenoid valve; 24. Medication sensor; 3. Infusion assembly; 31. Manifold; 32. Connecting tube; 33. One-way valve; 34. Infusion tube; 35. Flow control assembly; 36. Infusion needle; 4. Auxiliary assembly; 41. Insertion rod; 42. Limiting block; 43. Placement rod; 44. Placement plate; 45. Placement slot; 46. Snap-fit slot; 47. Heating device; 5. Counterweight assembly; 51. Placement block; 52. Handle; 53. Counterweight; 54. Limiting slot. Detailed Implementation
[0016] Reference Figures 1 to 9 The present invention provides an infusion device with an automatic drug switching function, comprising a drug placement rack 1, a plurality of drug bags 2 being provided on the top of the drug placement rack 1, an infusion assembly 3 being provided on the bottom of the drug bags 2, an auxiliary assembly 4 being provided in the middle of the drug placement rack 1, and the auxiliary assembly 4 cooperating with the infusion assembly 3, and a plurality of counterweights 5 being provided on the bottom of the drug placement rack 1.
[0017] As a further implementation of the above technical solution: the medicine placement rack 1 includes a frame 11 disposed on one side of the infusion assembly 3, a hanging plate 12 disposed on the top of the frame 11, a hook 13 disposed on the bottom of the hanging plate 12, and the hook 13 cooperates with the medicine bag 2, a plurality of mounting blocks 14 disposed in the middle of the frame 11, and mounting holes 15 opened in the middle of the mounting blocks 14, and the mounting holes 15 cooperate with the auxiliary assembly 4, the medicine placement rack 1 also includes a movable plate 16 disposed at the bottom of the frame 11, and a plurality of insertion slots 17 opened on the top of the movable plate 16, the insertion slots 17... An internal limit frame 18 is provided, and the limit frame 18 cooperates with the counterweight component 5. The bottom of the moving plate 16 is provided with several universal wheels 19. When in use, the medicine placement rack 1 serves as the supporting frame of the overall structure. Multiple medicine bags 2 are suspended from the top of the rack 11 by hooks 13. The medicine in the medicine bags 2 flows from top to bottom into the infusion tubes 34 by gravity. In order to ensure the stability of the center of gravity of the equipment under different load conditions, a counterweight component 5 is provided at the bottom. The counterweight block 53 is fitted into the insertion groove 17 by flexible rubber material and fixed by the limit frame 18, so that the entire device does not tilt or collapse when moving or carrying multiple medicine bags 2.
[0018] As a further implementation of the above technical solution: the top of the medicine bag 2 is provided with a placement frame 21, and the placement frame 21 cooperates with the hook 13. The bottom of the medicine bag 2 is provided with a liquid outlet pipe 22, and the liquid outlet pipe 22 is connected to the infusion assembly 3. The top of the liquid outlet pipe 22 is provided with a solenoid valve 23 and a liquid sensor 24. The solenoid valve 23 and the liquid sensor 24 are existing technologies, so they will not be described in detail. The solenoid valve 23 and the liquid sensor 24 cooperate with the medicine bag 2. When in use, the bottom of the medicine bag 2 is connected to the liquid outlet pipe 22. The solenoid valve 23 controls the release of the liquid, while the liquid sensor 24 monitors the remaining liquid and flow status in real time. When the liquid in a medicine bag is about to run out, the sensor detects a low liquid level signal, and the controller sends a closing command to the solenoid valve 23 and opens the solenoid valve 23 corresponding to the next medicine bag, realizing automatic switching of the liquid.
[0019] As a further implementation of the above technical solution: the infusion assembly 3 includes a collection tube 31 located at the bottom of the outlet tube 22. The top of the collection tube 31 is provided with several connecting tubes 32, which cooperate with the outlet tube 22. The top of the connecting tubes 32 is provided with a one-way valve 33. The bottom of the collection tube 31 is provided with an infusion tube 34. The outside of the infusion tube 34 is provided with a flow rate control component 35. The bottom of the infusion tube 34 is provided with an infusion needle. In use, the outlet tubes 22 of multiple drug bags 2 are connected to the collection tube 31 through the connecting tubes 32. The one-way valve 33 ensures that the liquid flows only downward to prevent backflow. The lower end of the collection tube 31 is connected to an infusion tube 34, which is equipped with a flow rate control component 35. The flow rate can be adjusted by medical staff. Finally, the infusion is introduced into the patient's body through the infusion needle 36.
[0020] As a further implementation of the above technical solution: the auxiliary component 4 includes an insertion rod 41 inserted into the mounting hole 15. One end of the insertion rod 41 is provided with a limiting block 42, and the other end is provided with a placement rod 43. The auxiliary component 4 also includes a placement plate 44 disposed on top of the placement rod 43. The bottom of the placement plate 44 is provided with a placement groove 45, which cooperates with the placement rod 43. One end of the placement plate 44 has a snap-fit groove 46, which cooperates with the infusion tube 34. The top of the placement plate 44 is provided with a heating device 47. The heating device 47 is an existing structure that can be selected and set according to the specific needs of use. The heating device 47 cooperates with the infusion tube 34. When in use, the insertion rod 41 is fixed in the medicine rack through the mounting hole 15 and connected to the placement rod 43 and then to the placement plate 44. The placement plate 44 is equipped with the heating device 47, which is used to regulate the temperature of the infusion tube 34. The heating device 47 maintains the medicine solution at a suitable temperature (such as 37°C) through the temperature control system to avoid stimulating the patient's blood vessels due to the medicine solution being too cold. In addition, the snap-fit groove 46 on the placement plate 44 is used to fix the infusion tube 34 to prevent the tube from slipping or bending due to shaking.
[0021] As a further implementation of the above technical solution: the outer surface of the infusion tube 34 is provided with a heating and heat preservation outer sleeve, and a heating wire is provided inside the outer sleeve. The heating wire is powered by electricity and is used to heat and keep the infusion tube 34 warm, thereby achieving heating and heat preservation of the infusion.
[0022] As a further implementation of the above technical solution: the counterweight assembly 5 includes a placement block 51 disposed inside the insertion slot 17, and the placement block 51 cooperates with the limiting frame 18. The top of the placement block 51 is provided with a handle 52, and the bottom of the placement block 51 is provided with a counterweight block 53. The bottom of the counterweight block 53 is provided with several limiting grooves 54. The counterweight block 53 cooperates with the insertion slot 17, and the counterweight block 53 is made of flexible rubber. When in use, the counterweight assembly 5 is inserted into the insertion slot 17 on the moving plate 16. The placement block 51 matches the limiting frame 18 to prevent slippage. The bottom counterweight block 53 increases the stability of the device, while the limiting grooves 54 further enhance the locking performance, so that it remains in the same position when pushed, pulled or shaken. The rubber material of the counterweight block 53 has certain elasticity and damping characteristics, which absorbs vibration during movement and reduces fluctuations in the flow rate of the liquid medicine.
[0023] Working principle: When using this invention, the medicine placement rack 1 forms the main support frame of the entire infusion system. Multiple medicine bags 2 are mounted on its top. Each medicine bag 2 is securely connected to the bottom hook 13 of the hanging plate 12 via a mounting frame 21 located at the top, forming a suspended arrangement structure. Under gravity, the medicine flows naturally from the outlet pipe 22 at the bottom of the medicine bag 2 to the infusion assembly 3. The solenoid valve 23 and medicine sensor 24 on the outlet pipe 22 are used to control the flow of liquid and monitor the liquid level, respectively. When a medicine bag is about to run out of liquid, the sensor detects a low liquid level signal in real time and feeds it back to the control system, triggering the closure of the current solenoid valve. 23. The next drug bag passage is opened, thereby realizing automatic drug switching and ensuring continuous and uninterrupted drug supply. The drug output path is through the outlet pipe 22 into the collection pipe 31 set below it. The top of the collection pipe 31 is connected to the outlet of each drug bag through multiple connecting pipes 32. Each connecting pipe 32 is equipped with a one-way air valve 33 to prevent drug backflow and avoid air backflow. The bottom of the collection pipe 31 is connected to an infusion tube 34. The infusion tube 34 is equipped with a flow rate control component 35 on the outside, which makes it easy for medical staff to accurately adjust the drug flow rate according to the patient's needs. Finally, the drug is introduced into the human body through the infusion needle 36 at the bottom to complete the treatment operation.
[0024] In the middle of the support structure, an auxiliary component 4 is installed via mounting block 14 and mounting hole 15. The auxiliary component 4 includes a detachable insertion rod 41, a placement rod 43, and a placement plate 44 at the top. The bottom of the placement plate 44 has a placement groove 45 to connect with the infusion tube 34, and the top has a heating device 47 to control the temperature of the infusion tube 34 section, maintaining it at a suitable temperature range such as 37°C to prevent the low-temperature drug solution from irritating the patient's blood vessels. One end of the placement plate 44 has a snap-fit groove 46 to fix the infusion tube 34, and the entire assembly... A movable plate 16 is installed at the bottom. The movable plate 16 has multiple insertion slots 17 for placing the counterweight assembly 5. The counterweight assembly 5 includes a handle 52, a placement block 51, and a counterweight block 53 made of flexible rubber. The counterweight block 53 is engaged with the limiting frame 18 through the bottom limiting slot 54 to enhance the anti-shaking ability and provide a certain damping buffer effect to prevent the fluid flow from becoming unstable or the structure from tilting due to movement during infusion. The bottom of the movable plate 16 is equipped with casters 19 to improve the deployment flexibility of the equipment in various scenarios such as hospitals and emergency sites.
[0025] In summary, by utilizing the above-mentioned technical solution of the present invention, the infusion device with automatic drug switching function designed by the present invention achieves stable suspension of the drug bags by setting multiple drug bags at the top of the drug placement rack, combined with a hanging plate and hook structure, preventing them from falling off and evenly distributing the load. The bottom of the drug bags is connected to the infusion assembly through an outlet pipe. The outlet pipe is embedded with a solenoid valve and a drug sensor. The solenoid valve precisely controls the flow of the drug solution, and the sensor realizes liquid level detection and status monitoring, thereby realizing automatic switching of multiple drug bags and ensuring infusion safety, avoiding drug leakage and human operation errors. At the same time, the infusion assembly is equipped with a collection pipe and several connecting pipes to form a liquid confluence channel, and the top one-way air valve prevents drug backflow and effectively blocks air from entering, improving the purity and safety of the infusion.
[0026] Furthermore, the infusion device with automatic medication switching function designed in this invention uses an infusion tube connected to the lower end of the main tube to a flow rate control component to adjust the infusion speed, ensuring that the medication delivery rate meets the patient's needs. An infusion needle is installed at the bottom of the infusion tube to directly administer medication. The medication holder has a mounting block and mounting hole in the middle for inserting and fixing auxiliary components, and the placement groove and snap-fit groove ensure a stable fit with the infusion tube. At the same time, a heating device controls the temperature of the medication to avoid discomfort caused by low temperature. The counterweight component at the bottom of the medication holder includes a counterweight block made of flexible rubber material. A stable base is constructed through a limiting frame and insertion groove. The counterweight block has a limiting groove to prevent position displacement. The top handle is easy to disassemble and replace, and the casters enable flexible movement to adapt to different scenarios for deployment and adjustment, ensuring that the infusion device has a high degree of automation, reliability, and on-site adaptability.
[0027] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. An infusion device with automatic drug switching function, characterized in that, The utility model provides a medicine liquid placing rack, which comprises a medicine liquid placing rack (1), the top of the medicine liquid placing rack (1) is provided with a plurality of medicine bags (2), the bottom of the medicine bag (2) is provided with an infusion assembly (3), the middle part of the medicine liquid placing rack (1) is provided with an auxiliary assembly (4), and the auxiliary assembly (4) is matched with the infusion assembly (3), and the bottom of the medicine liquid placing rack (1) is provided with a plurality of counterweight assemblies (5).
2. The infusion device with automatic switching of the liquid medicine function according to claim 1, characterized in that: The medicine liquid placing rack (1) comprises a rack body (11) arranged on one side of the infusion assembly (3), the top of the rack body (11) is provided with a hanging plate (12), the bottom of the hanging plate (12) is provided with a hook (13), the hook (13) is matched with the medicine bag (2), the middle part of the rack body (11) is provided with a plurality of mounting blocks (14), the middle part of the mounting block (14) is provided with a mounting hole (15), and the mounting hole (15) is matched with the auxiliary assembly (4).
3. The infusion device with automatic switching of the liquid medicine function according to claim 2, characterized in that: The medicine liquid placing rack (1) further comprises a moving plate (16) arranged at the bottom of the rack body (11), the top of the moving plate (16) is provided with a plurality of insertion grooves (17), the inside of the insertion groove (17) is provided with a limiting frame (18), the limiting frame (18) is matched with the counterweight assembly (5), and the bottom of the moving plate (16) is provided with a plurality of universal wheels (19).
4. The infusion device with automatic switching of the liquid medicine function according to claim 3, characterized in that: The top of the medicine bag (2) is provided with a placing frame (21), and the placing frame (21) is matched with the hook (13); the bottom of the medicine bag (2) is provided with a liquid outlet pipe (22), and the liquid outlet pipe (22) is connected with the infusion assembly (3); the top of the liquid outlet pipe (22) is provided with an electromagnetic valve (23) and a medicine liquid sensor (24), and the electromagnetic valve (23) and the medicine liquid sensor (24) are matched with the medicine bag (2).
5. The infusion device with automatic switching of the liquid medicine function according to claim 4, characterized in that: The infusion assembly (3) comprises a collection pipe (31) arranged at the bottom of the liquid outlet pipe (22), the top of the collection pipe (31) is provided with a plurality of butt joint pipes (32), the butt joint pipe (32) is matched with the liquid outlet pipe (22), the top of the butt joint pipe (32) is provided with a one-way air valve (33), the bottom of the collection pipe (31) is provided with an infusion pipe (34), the outer side of the infusion pipe (34) is provided with a flow rate control assembly (35), and the bottom of the infusion pipe (34) is provided with an infusion needle (36).
6. The infusion device with automatic switching of the liquid medicine function according to claim 5, characterized in that: The auxiliary assembly (4) comprises an insertion rod (41) arranged in the mounting hole (15), one end of the insertion rod (41) is provided with a limiting block (42), and the other end of the insertion rod (41) is provided with a placing rod (43).
7. The infusion device with automatic switching of the liquid medicine function according to claim 6, characterized in that: The auxiliary assembly (4) further comprises a placing plate (44) arranged at the top of the placing rod (43), the bottom of the placing plate (44) is provided with a placing groove (45), the placing groove (45) is matched with the placing rod (43), one end of the placing plate (44) is provided with a clamping groove (46), the clamping groove (46) is matched with the infusion tube (34), and the top of the placing plate (44) is provided with a warming device (47), and the warming device (47) is matched with the infusion tube (34).
8. The infusion device with automatic switching of the liquid medicine function according to claim 3, characterized in that: The counterweight assembly (5) comprises a placing block (51) arranged in the insertion groove (17), and the placing block (51) is matched with the limiting frame (18); the top of the placing block (51) is provided with a handle (52); and the bottom of the placing block (51) is provided with a counterweight block (53), and the bottom of the counterweight block (53) is provided with a plurality of limiting grooves (54).
9. The infusion device with automatic switching of the liquid medicine function according to claim 8, characterized in that: The counterweight block (53) is matched with the insertion groove (17), and the counterweight block (53) is made of flexible rubber.