Anesthetic filling device

Abstract

The utility model provides an anesthetic filling device which comprises a filling pipe, and the filling pipe is communicated with a medicament bottle and an anesthesia machine volatilization tank. A first connecting part connected with the anesthesia machine volatilization tank and a second connecting part connected with the medicament bottle are arranged at the two ends of the filling pipe respectively; the filling pipe is provided with a liquid injection channel and a gas guide channel. According to the anesthetic filling device, through the arrangement of the filling pipe, anesthetic can be filled into the volatilization tank of the anesthesia machine from the medicament bottle through the liquid filling channel, and meanwhile, gas in the volatilization tank of the anesthesia machine enters the medicament bottle through the gas guide channel, so that volatilization and leakage of the anesthetic are reduced, and the body health of operators is guaranteed; and the practicability is very good.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an anesthetic filling device. Background Art

[0002] The anesthesia machine can evaporate the anesthetic into gas and mix a certain amount of anesthetic vapor with the carrier gas to form an anesthetic mixed gas with a certain concentration. The gas is then injected into the patient's lungs. The anesthetic drug is used to temporarily cause the patient to lose sensation as a whole or in part, thereby achieving anesthesia for the patient and allowing for painless surgical treatment.

[0003] During use of an anesthesia machine, anesthetic agent must be added to the anesthesia machine through the injection port of the anesthesia machine vaporizer. The anesthetic agent is usually packaged in a medicine bottle, and the injection port of the anesthesia machine vaporizer is usually screwed with a sealing plug for sealing the injection port. Currently, during the anesthetic agent addition process, the sealing plug on the anesthesia machine vaporizer must first be removed, and then the medicine bottle is opened. The anesthetic agent in the medicine bottle is poured directly into the injection port by holding the medicine bottle, or the anesthetic agent is poured into the injection port through a funnel.

[0004] During the above-mentioned process of adding anesthetic, when the medicine bottle is opened and the anesthetic is infused, the anesthetic is directly exposed to the air, and part of the anesthetic will evaporate into the air and be easily inhaled by the operator. During the long-term operation of the anesthesia machine vaporizer, the operator is likely to inhale too much anesthetic and cause harm to the body, affecting the operator's health. Utility Model Content

[0005] In view of this, the present invention aims to provide an anesthetic filling device to reduce the volatilization and leakage of the anesthetic.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] An anesthetic agent filling device includes a filling pipe, which is connected to a medicine bottle and an anesthesia machine vaporizer; the two ends of the filling device are respectively provided with a first connecting part connected to the anesthesia machine vaporizer, and a second connecting part connected to the medicine bottle; the filling pipe has an injection channel and an air guide channel.

[0008] Furthermore, the first connecting portion can switch between a closed state and an open state triggered by an operation; in the open state, the liquid injection channel and the air guide channel are both connected to the drug injection port of the anesthesia machine vaporizer.

[0009] Furthermore, the first connecting portion includes a cylindrical valve core and a valve sleeve mounted on the outside of the valve core; one end of the valve core is connected to the filling pipe, and the outer peripheral surface of the valve core is provided with a liquid outlet connected to the injection channel, and an air inlet connected to the air guide channel; the valve sleeve can be kept on the valve core by reciprocating along the axial direction of the valve core, and when the valve sleeve is operated to move toward the filling pipe to a predetermined position, the valve sleeve can open the air inlet and the liquid outlet.

[0010] Furthermore, an elastic member is provided between the valve sleeve and the valve core. When the valve sleeve moves toward the filling pipe, the elastic member is compressed by the valve sleeve to store energy. When the elastic member releases energy, it can drive the valve sleeve away from the filling pipe to close the liquid outlet and the air inlet.

[0011] Furthermore, the first connecting portion also includes a threaded sleeve nested in the outer periphery of the valve core; the threaded sleeve can rotate freely around the axis of the valve core; and the outer peripheral surface of the threaded sleeve is provided with an external thread for connecting to the drug injection port of the anesthesia machine vaporizer.

[0012] Furthermore, a first sealing ring is provided on the valve sleeve, and the first sealing ring constitutes a seal between the valve sleeve and the threaded sleeve; a second sealing ring is provided on the valve core, and the second sealing ring constitutes a seal between the valve core and the valve sleeve.

[0013] Furthermore, the second connecting part includes a base connected to the filling pipe and a connecting cover mounted on the outer periphery of the base; the side of the base facing the medicine bottle is provided with a liquid inlet connected to the injection channel, and an air outlet connected to the air guide channel; the connecting cover can be connected to the bottle mouth of the medicine bottle.

[0014] Furthermore, the base is detachably connected to the connection cover.

[0015] Furthermore, the connecting cover includes an inner sleeve connected to the base, and a sealing cover sleeved outside the inner sleeve; the sealing cover can rotate freely around the axis of the inner sleeve, and a sealing gasket is provided between the inner sleeve and the sealing cover.

[0016] Furthermore, a pipe for extending the air guide channel is provided on the base, the pipe extends toward the medicine bottle, and the air outlet is located at the end of the channel.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] The anesthetic filling device of the utility model can fill anesthetic from the medicine bottle into the vaporizer of the anesthesia machine through the liquid injection channel by providing the filling pipe, and at the same time, the gas in the vaporizer of the anesthesia machine enters the medicine bottle through the air guide channel, so as to reduce the volatilization and leakage of the anesthetic, ensure the health of the operator, and have good practicality.

[0019] The first connecting part can switch between a closed state and an open state triggered by an operation. When in the open state, the liquid injection channel and the gas guide channel are both connected to the drug injection port of the anesthesia machine vaporizer. The openable and closable setting of the first connecting part can prevent the anesthetic from leaking from the liquid injection channel.

[0020] The first connection portion includes a cylindrical valve core and a valve sleeve that is sleeved over the valve core. A filling pipe is connected to one end of the valve core, and the outer circumference of the valve core is provided with a liquid outlet connected to the liquid injection channel and an air inlet connected to the air guide channel. The valve sleeve can be retained on the valve core for reciprocating movement along the axis of the valve core. When the valve sleeve is operated to move toward the filling pipe to a predetermined position, the valve sleeve can open the air inlet and liquid outlet. Thus, through the arrangement of the valve sleeve and valve core, when the first connection portion is connected to the injection port of the anesthesia machine vaporizer, the valve sleeve can be triggered by the injection port and open the first connection portion, thereby preventing anesthetic leakage from the injection channel.

[0021] An elastic member is installed between the valve sleeve and the valve core. When the valve sleeve moves toward the filling pipe, the elastic member is compressed by the valve sleeve, storing energy. When the elastic member releases energy, it can drive the valve sleeve away from the filling pipe, closing the liquid outlet and air inlet. Due to the provision of the elastic member, after anesthetic agent is filled, when the injection port of the anesthesia machine vaporizer at the first connection is separated, the elastic member releases energy and pushes the valve sleeve, placing the first connection into a closed state, preventing the anesthetic agent remaining in the filling pipe from flowing out and leaking, further improving user safety.

[0022] The first connection also includes a threaded sleeve nested within the outer periphery of the valve core. The sleeve is capable of freely rotating about the axis of the valve core, and its outer surface is provided with external threads for connecting to the injection port of the anesthesia machine's vaporizer. This prevents the first connection from causing the filling tube to rotate synchronously when the first connection is threaded, potentially affecting the operator's operation. A first sealing ring is provided on the valve sleeve, forming a seal between the valve sleeve and the threaded sleeve. A second sealing ring is provided on the valve core, forming a seal between the valve core and the valve sleeve, further improving the sealing performance of the first connection and preventing volatilization and leakage of the anesthetic agent.

[0023] The second connecting part includes a base connected to the filling pipe and a connecting cover mounted on the outer periphery of the base; a liquid inlet connected to the liquid injection channel and an air outlet connected to the air guide channel are provided on the side of the base facing the medicine bottle; the connecting cover can be connected to the bottle mouth of the medicine bottle to facilitate the connection between the filling pipe and the medicine bottle, facilitate the filling of anesthetics, and prevent the volatilization and leakage of anesthetics.

[0024] The base is detachably connected to the connecting cover, so that connecting covers of different specifications can be easily replaced to be suitable for medicine bottles of different specifications, thereby having good versatility.

[0025] The connecting cover includes an inner sleeve connected to the base and a sealing cap that fits over the inner sleeve. The sealing cap can rotate freely around the axis of the inner sleeve, and a sealing gasket is provided between the inner sleeve and the sealing cap. This prevents the base and the filling pipe from rotating with the sealing cap, which could affect the operator's operation.

[0026] A pipe for extending the air guide channel is provided on the base. The pipe extends toward the medicine bottle, and the air outlet is located at the end of the channel, so that the anesthetic in the medicine bottle is discharged from the injection channel, and the gas in the vaporizer of the anesthesia machine enters the medicine bottle through the air guide channel, ensuring the smoothness of anesthetic filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the overall structure of the anesthetic filling device according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic structural diagram of an embodiment of the present invention when the first connecting portion and the drug injection port are not connected in place;

[0030] Figure 3 This is a schematic structural diagram of the first connecting portion and the drug injection port according to an embodiment of the present utility model when they are connected in place;

[0031] Figure 4 This is a structural diagram of the second connecting portion of an embodiment of the present utility model being connected to a medicine bottle;

[0032] Description of reference numerals:

[0033] 1. Filling tube; 2. First connection; 3. Second connection; 4. Medicine bottle; 5. Anesthesia machine vaporizer;

[0034] 11. Liquid injection channel; 12. Gas guide channel;

[0035] 21. Valve core; 22. Valve sleeve; 23. Threaded sleeve; 24. Elastic member; 25. First sealing ring; 26. Second sealing ring;

[0036] 211, liquid outlet; 212, air inlet;

[0037] 31. Base; 32. Inner sleeve; 33. Cover; 34. Sealing gasket;

[0038] 311, liquid inlet; 312, gas outlet; 313, pipeline;

[0039] 51. Injection port; 52. Reduced diameter section. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0041] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0042] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0044] This embodiment relates to an anesthetic agent filling device, which is used to fill the anesthetic agent in a medicine bottle 4 into a vaporizer 5 of an anesthesia machine.

[0045] In terms of overall structure, Figure 1 As shown, the anesthetic filling device of this embodiment includes a filling pipe 1, which connects the medicine bottle 4 and the anesthesia machine vaporizer 5. The two ends of the filling pipe 1 are respectively provided with a first connecting part 2 connected to the anesthesia machine vaporizer 5, and a second connecting part 3 connected to the medicine bottle 4. The filling pipe 1 has an injection channel 11 and an air guide channel 12.

[0046] As described above, the anesthetic filling device of this embodiment can fill anesthetic from the medicine bottle 4 into the anesthesia machine vaporizer 5 through the liquid injection channel 11 through the setting of the filling tube 1, and at the same time, the gas in the anesthesia machine vaporizer 5 enters the medicine bottle 4 through the air guide channel 12, so as to reduce the volatilization and leakage of the anesthetic, ensure the health of the operator, and have good practicality.

[0047] Based on the above overall introduction, specifically, continue to combine Figure 1 As shown, in this embodiment, the anesthetic in the medicine bottle 4 flows into the anesthesia machine vaporizer 5 through the injection channel 11, and the corresponding gas in the anesthesia machine vaporizer 5 enters the medicine bottle 4 through the air guide channel 12 to ensure the smoothness of filling, while avoiding the anesthetic, the anesthesia machine vaporizer 5 or the gas in the medicine bottle 4 from leaking into the air, preventing the volatilized anesthetic from being inhaled by the operator.

[0048] The filling tube 1 of this embodiment is a tubular structure made of silicone material, with a liquid injection channel 11 and an air guide channel 12 constructed within the tubular structure. Alternatively, the filling tube 1 is composed of two silicone hoses, with the two silicone hoses forming the liquid injection channel 11 and the air guide channel 12 respectively. To ensure smooth anesthetic injection, the inner diameter of the liquid injection channel 11 should be larger than the inner diameter of the air guide channel 12. This configuration ensures that the flow resistance of the anesthetic in the liquid injection channel 11 is relatively small, while the flow resistance in the air guide channel 12 is relatively large, thereby preventing the anesthetic from entering the air guide channel 12 to a certain extent.

[0049] In order to prevent the anesthetic agent in the filling tube 1 from flowing out and leaking, the first connecting portion 2 can be switched between a closed state and an open state triggered by an operation. It can be understood that during the filling process, the filling device of this embodiment is first connected to the medicine bottle 4, and then the filling device is connected to the anesthesia machine vaporizer 5. After the filling device is connected to the medicine bottle 4, the anesthetic agent can easily flow out through the injection channel 11, or the volatile gas of the anesthetic agent can easily be emitted into the air through the injection channel 11. Therefore, the setting form of the first connecting portion 2 having two states, open and closed, can ensure that the first connecting portion 2 is placed in the open state only when injection is required to prevent anesthetic leakage. In the open state, the injection channel 11 and the air guide channel 12 are both connected to the injection port 51 of the anesthesia machine vaporizer 5.

[0050] Specific, combined Figure 2 and Figure 3As shown, the first connecting portion 2 includes a cylindrical valve core 21 and a valve sleeve 22 that is sleeved over the valve core 21. One end of the valve core 21 is connected to the filling pipe 1. The outer circumference of the valve core 21 is provided with a liquid outlet 211 that communicates with the liquid injection channel 11, and an air inlet 212 that communicates with the air guide channel 12. The valve sleeve 22 is retained on the valve core 21 for reciprocating movement along the axis of the valve core 21. When the valve sleeve 22 is moved toward the filling pipe 1 to a predetermined position, the valve sleeve 22 can open the air inlet 212 and the liquid outlet 211.

[0051] The valve core 21 has two internal channels, one connected to the liquid outlet channel and the other to the air guide channel 12. The valve sleeve 22 has an opening extending through the inside and outside of the valve sleeve 22. When the valve sleeve 22 moves to a predetermined position toward the filling pipe 1, the opening aligns with the air inlet 212 and the liquid outlet 211, opening them. The remaining portion of the valve sleeve 22 blocks the air inlet 212 and the liquid outlet 211 when the first connecting portion 2 is closed.

[0052] It is understood that during the process of connecting the filling device of this embodiment to the anesthesia machine vaporizer 5 via the first connecting portion 2, the first connecting portion 2 is connected to the injection port 51 of the anesthesia machine vaporizer 5. Typically, a sealing plug is threaded onto the injection port 51 of the anesthesia machine vaporizer 5, and the diameter of the injection port 51 is gradually reduced from the outside to the inside of the anesthesia machine vaporizer 5, so that a reduced diameter section 52 is provided within the injection port 51. When the first connecting portion 2 is connected to the injection port 51, the first connecting portion 2 extends into the injection port 51. During the extension process, the reduced diameter section 52 within the injection port 51 can push the end of the valve sleeve 22, causing the valve sleeve 22 to approach the filling pipe 1 along the axis of the valve core 21. When the valve sleeve 22 moves to the predetermined position, that is, when the first connecting portion 2 is in place with the injection port 51, the liquid outlet 211 and the air inlet 212 are opened for anesthetic injection. At this time, the first connecting portion 2 is in an open state.

[0053] In specific implementation, combined with Figure 2 and Figure 3 As shown, since the anesthetic agent flows out of the liquid outlet 211, and the gas in the anesthesia machine vaporizer 5 enters the air guide channel 12 through the air inlet 212, in order to prevent the anesthetic agent from entering the air inlet 212, the liquid outlet 211 and the air inlet 212 can be preferably staggered in the length direction of the valve core 21, and staggered in the circumferential direction of the valve core 21 to ensure that a certain distance is left between the liquid outlet 211 and the air inlet 212 to prevent the anesthetic agent from entering the air inlet 212 and affecting the filling of the anesthetic agent.

[0054] After injecting the anesthetic, the first connecting portion 2 needs to be separated from the injection port 51. To prevent leakage of the anesthetic during the separation process, an elastic member 24 is provided between the valve sleeve 22 and the valve core 21 of this embodiment. When the valve sleeve 22 approaches the filling pipe 1, the elastic member 24 is compressed by the valve sleeve 22 to store energy. When the elastic member 24 releases the energy, it can drive the valve sleeve 22 away from the filling pipe 1 to close the liquid outlet 211 and the air inlet 212. Therefore, when the first connecting portion 2 is separated from the injection port 51, the valve sleeve 22, driven by the elastic member 24, can close the liquid outlet 211 and the air inlet 212, placing the first connecting portion 2 in a closed state and preventing leakage of the anesthetic.

[0055] In practice, the elastic member 24 of this embodiment is preferably a spring disposed around the valve core 21 to ensure that it can be compressed and stored. Furthermore, since the liquid outlet 211 and the air inlet 212 are offset along the length of the valve core 21, the air inlet 212 is preferably positioned closer to the end of the valve core 21. It is understood that during the process of extending the first connecting portion 2 into the injection port 51 as described above, the valve sleeve 22 is pushed to open the air inlet 212 first. The liquid outlet 211 is then opened after the first connecting portion 2 and the injection port 51 are connected. This prevents the anesthetic at the liquid outlet 211 from flowing out or evaporating into the air while the first connecting portion 2 and the injection port 51 are not yet connected, thereby preventing anesthetic leakage. During the process of separating the first connecting portion 2 from the injection port 51, the valve sleeve 22 is driven back to its original position by the elastic member 24, initially closing the liquid outlet 211 to further prevent anesthetic leakage.

[0056] Since the injection port 51 of the anesthesia machine vaporizer 5 has an internal thread for connecting with the sealing plug, the first connecting portion 2 can be preferably connected to the injection port 51 by a threaded connection. Specifically, Figure 2 and Figure 3 As shown, the first connection portion 2 also includes a threaded sleeve 23 nested on the outer circumference of the valve core 21. The threaded sleeve 23 can rotate freely about the axis of the valve core 21, and the outer circumferential surface of the threaded sleeve 23 is provided with external threads for connecting to the injection port 51 of the anesthesia machine vaporizer 5. The first connection portion 2 can be connected to the injection port 51 by rotating the threaded sleeve 23, and the threaded connection method has good stability and sealing. At the same time, the threaded sleeve 23 can rotate relative to the valve core 21. When the threaded sleeve 23 is operated, the valve core 21 and the filling pipe 1 will not rotate with the threaded sleeve 23, which facilitates the operator's operation.

[0057] In a specific implementation, knurling is arranged on part of the outer circumference of the threaded sleeve 23 , which can increase the friction force of the outer circumference of the threaded sleeve 23 , so that the operator can screw the threaded sleeve 23 into the injection port 51 .

[0058] It is understandable that relative movement between the threaded sleeve 23, the valve sleeve 22, and the valve core 21 can easily lead to a decrease in sealing performance, resulting in anesthetic leakage. Therefore, in this embodiment, a first sealing ring 25 is provided on the valve sleeve 22, which forms a seal between the valve sleeve 22 and the threaded sleeve 23. A second sealing ring 26 is provided on the valve core 21, which forms a seal between the valve core 21 and the valve sleeve 22, thereby further improving the sealing performance of the first connecting portion 2. In a specific embodiment, three second sealing rings 26 are provided on the valve core 21, respectively, at the upper and lower ends of the liquid outlet 211 and the air inlet 212, and between the liquid outlet 211 and the air inlet 212.

[0059] In this embodiment, combined with Figure 4 As shown, the second connecting portion 3 includes a base 31 connected to the filling tube 1 and a connecting cap sleeved around the outer periphery of the base 31. The side of the base 31 facing the medicine bottle 4 is provided with a liquid inlet 311 connected to the liquid injection channel 11 and an air outlet 312 connected to the air guide channel 12. The connecting cap can be connected to the bottle mouth of the medicine bottle 4. First, remove the bottle cap of the medicine bottle 4, then screw the connecting cap onto the bottle mouth, thereby completing the connection between the second connecting portion 3 and the medicine bottle 4.

[0060] To accommodate medicine bottles 4 of varying sizes, the base 31 of this embodiment is detachably connected to the connecting cap. This allows the base 31, and thus the filling tube 1, to be connected to connecting caps of varying sizes, thereby accommodating medicine bottles 4 of varying sizes, thereby enhancing the versatility of the filling device. In practice, the base 31 is detachably connected to the connecting cap via threads, and knurling is provided on the outer circumference of both the base 31 and the connecting cap to facilitate assembly and disassembly.

[0061] To further facilitate operation, the connecting cap of this embodiment includes an inner sleeve 32 connected to the base 31 and a sealing cap 33 that fits over the inner sleeve 32. The sealing cap 33 is able to rotate freely about the axis of the inner sleeve 32, and a sealing gasket is provided between the inner sleeve 32 and the sealing cap 33. This sealing gasket ensures a tight seal between the medicine bottle 4 and the inner sleeve 32, i.e., the connecting cap. The effect of the sealing cap 33's rotation is similar to that of the threaded sleeve 23 described above, and both are for ease of operation, so they will not be further described here.

[0062] In addition, the base 31 is provided with a pipe 313 for extending the air channel 12. The pipe 313 extends toward the medicine bottle 4, and the gas outlet 312 is located at the end of the pipe. This facilitates the flow of gas in the air channel 12 into the medicine bottle 4, improving the smoothness of anesthetic filling.

[0063] In summary, the anesthetic filling device of this embodiment, through the provision of the filling tube 1, can fill anesthetic from the medicine bottle 4 into the anesthesia machine vaporizer 5 through the liquid injection channel 11, and at the same time allow the gas in the anesthesia machine vaporizer 5 to enter the medicine bottle 4 through the air guide channel 12, thereby reducing the volatilization and leakage of the anesthetic, ensuring the health of the operator, and having good practicality.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anesthetic agent filling device, characterized in that: It comprises a filling pipe (1), wherein the filling pipe (1) is connected to a medicine bottle (4) and an anesthesia machine vaporizer (5); Both ends of the filling pipe (1) are respectively provided with a first connection portion (2) connected to the anesthesia machine vaporizer (5), and a second connection portion (3) connected to the medicine bottle (4); The filling pipe (1) has a liquid injection channel (11) and an air guide channel (12).

2. The anesthetic agent filling device according to claim 1, characterized in that: The first connection portion (2) is switchable between a closed state and an open state triggered by an operation; In the open state, the liquid injection channel (11) and the air guide channel (12) are both in communication with the drug injection port (51) of the anesthesia machine vaporizer (5).

3. The anesthetic agent filling device according to claim 2, characterized in that: The first connecting portion (2) comprises a cylindrical valve core (21) and a valve sleeve (22) sleeved outside the valve core (21); One end of the valve core (21) is connected to the filling pipe (1), and the outer peripheral surface of the valve core (21) is provided with a liquid outlet (211) communicating with the liquid injection channel (11), and an air inlet (212) communicating with the air guide channel (12); The valve sleeve (22) can be held on the valve core (21) so as to reciprocate along the axial direction of the valve core (21). When the valve sleeve (22) is operated to move toward the filling pipe (1) to a predetermined position, the valve sleeve (22) can open the air inlet (212) and the liquid outlet (211).

4. The anesthetic agent filling device according to claim 3, characterized in that: An elastic member (24) is provided between the valve sleeve (22) and the valve core (21); when the valve sleeve (22) moves toward the filling pipe (1), the elastic member (24) is compressed by the valve sleeve (22) to store energy; when the elastic member (24) releases energy, the valve sleeve (22) can be driven away from the filling pipe (1) to close the liquid outlet (211) and the air inlet (212).

5. The anesthetic agent filling device according to claim 4, characterized in that: The first connecting portion (2) further comprises a threaded sleeve (23) nested in the outer periphery of the valve core (21); The threaded sleeve (23) can freely rotate around the axis of the valve core (21); and an external thread for connecting to the drug injection port (51) of the anesthesia machine vaporizer (5) is provided on the outer peripheral surface of the threaded sleeve (23).

6. The anesthetic agent filling device according to claim 5, characterized in that: The valve sleeve (22) is provided with a first sealing ring (25), and the first sealing ring (25) forms a seal between the valve sleeve (22) and the threaded sleeve (23); A second sealing ring (26) is provided on the valve core (21), and the second sealing ring (26) forms a seal between the valve core (21) and the valve sleeve (22).

7. The anesthetic agent filling device according to any one of claims 1 to 6, characterized in that: The second connecting portion (3) includes a base (31) connected to the filling pipe (1), and a connecting cover sleeved on the outer periphery of the base (31); The base (31) is provided with a liquid inlet (311) connected to the liquid injection channel (11) and an air outlet (312) connected to the air guide channel (12) on a side facing the medicine bottle (4); The connecting cover can be connected to the bottle mouth of the medicine bottle (4).

8. The anesthetic agent filling device according to claim 7, characterized in that: The base (31) is detachably connected to the connection cover.

9. The anesthetic agent filling device according to claim 7, characterized in that: The connecting cover comprises an inner sleeve (32) connected to the base (31), and a sealing cover (33) sleeved outside the inner sleeve (32); The sealing cover (33) can rotate freely around the axis of the inner sleeve (32), and a sealing gasket is provided between the inner sleeve (32) and the sealing cover (33).

10. The anesthetic agent filling device according to claim 7, characterized in that: The base (31) is provided with a pipe (313) for extending the air guide channel (12), the pipe (313) extends toward the medicine bottle (4), and the air outlet (312) is located at the end of the channel.

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