A liquid injection tube head, an automatic dispensing device, and an automatic dispensing container.

Abstract

This invention belongs to the field of liquid nitrogen filling technology, and discloses a filling nozzle, an automatic filling device, and an automatic filling container. The filling nozzle includes a nozzle body and a sensing component. The nozzle body includes a liquid channel and a gas channel. The outlet end of the nozzle body can be inserted into the container. The liquid channel extends axially along the nozzle body and passes through the inlet and outlet ends of the nozzle body. The gas channel includes a first gas channel and a second gas channel that are interconnected. The included angle α between the first gas channel and the liquid channel is ≤90°. The port of the first gas channel is connected to the periphery of the liquid channel. The second gas channel extends axially along the nozzle body and passes through the outlet end of the nozzle body. The second gas channel is provided with a guide groove extending axially along the nozzle body. The sensing component includes a sensor slidably disposed in the guide groove and a sensor disposed on the nozzle body. The filling nozzle provided by this invention effectively prevents liquid from overflowing from the container.

Description

Technical Field

[0001] This invention relates to the field of liquid nitrogen filling technology, and in particular to a liquid filling tube head, an automatic filling device, and an automatic filling container. Background Technology

[0002] With the rapid advancements in research methods such as genomics, transcriptomics, and proteomics, various analytical techniques have placed higher demands on the quality of biological samples. Due to the cryogenic properties of liquid nitrogen (-196℃), it can effectively protect samples and improve their viability. Therefore, liquid nitrogen is widely used in biomedical research and clinical fields as a cost-effective cryoprotectant.

[0003] In existing technologies, liquid nitrogen is typically stored in containers, and the containers are usually filled by manual pouring or by adding it through pipes. Both manual pouring and piped filling methods can result in liquid spillage, wasting the liquid nitrogen and posing a safety hazard of frostbite. Summary of the Invention

[0004] One object of the present invention is to provide a liquid injection nozzle that can prevent liquid from overflowing from the container.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A liquid injection tube head is provided, comprising:

[0007] The tube head body includes a liquid channel and a gas channel. The liquid outlet end of the tube head body can be inserted into a container. The liquid channel extends along the axial direction of the tube head body and passes through the liquid inlet end and the liquid outlet end of the tube head body. The gas channel includes a first gas channel and a second gas channel that are interconnected. The included angle α between the first gas channel and the liquid channel is ≤90°. The port of the first gas channel is connected to the periphery of the liquid channel. The second gas channel extends along the axial direction of the tube head body and passes through the liquid outlet end of the tube head body. The second gas channel is provided with a guide groove extending along the axial direction of the tube head body.

[0008] The sensing assembly includes a sensing element slidably disposed within the guide groove and a sensor disposed on the tube head body; wherein,

[0009] When liquid is injected into the liquid channel and the liquid in the container does not submerge the port of the second gas channel, the gas in the gas channel flows from the port of the second gas channel to the port of the first gas channel. The flowing gas enables the sensor to detect the sensing element and send a first signal.

[0010] When liquid is injected into the liquid channel and the liquid in the container exceeds the port of the second gas channel, or when no liquid is injected into the liquid channel, the sensor can detect the sensing element and send a second signal.

[0011] Optionally, the liquid channel includes a first liquid channel and a second liquid channel sequentially from the inlet end to the outlet end, the cross-section of the first liquid channel is larger than the cross-section of the second liquid channel, and the port of the first gas channel is connected to the periphery of the second liquid channel.

[0012] Optionally, the sensor is configured as a pressure sensor, which is located in the guide groove and on the side of the sensing element facing the liquid inlet end of the tube head body.

[0013] Optionally, the sensing element is configured as a magnetic ring, and the sensor is configured as a first magnetic switch and a second magnetic switch. The first magnetic switch and the second magnetic switch are arranged sequentially and alternately from the liquid inlet end to the liquid outlet end along the axial direction of the tube head body, and both the first magnetic switch and the second magnetic switch are located on one side of the guide groove.

[0014] Optionally, the guide groove is provided with an elastic element, which is located on the side of the sensing element away from the liquid inlet end of the tube head body.

[0015] Optionally, a guide post is provided in the guide groove, and the sensing element is sleeved on the guide post.

[0016] Optionally, the pipe head body includes a liquid pipe, a gas pipe, and an insulation layer covering the liquid pipe and the gas pipe; wherein,

[0017] The liquid tube includes the liquid channel, and the gas tube includes the gas channel.

[0018] Optionally, a limiting member is provided on the outer periphery of the tube head body, the limiting member being used to abut against the container.

[0019] Another object of the present invention is to provide an automatic dispensing device, comprising:

[0020] Filling tube;

[0021] A solenoid valve is located at the first end of the filling pipe;

[0022] The injection tube head described in any one of the above embodiments is located at the second end of the injection tube, and the sensor of the injection tube head is electrically connected to the solenoid valve.

[0023] Another object of the present invention is to provide an automatic dispensing container, comprising:

[0024] container;

[0025] The aforementioned automatic dispensing device has its dispensing tube head inserted into the container.

[0026] Beneficial effects:

[0027] The liquid injection nozzle provided by this invention allows the outlet end of the nozzle body to be inserted into a container. Liquid is then injected into the liquid channel through the inlet end of the nozzle body. Because the angle α between the first gas channel and the liquid channel is ≤90°, the liquid will not flow from the first gas channel into the second gas channel. When the liquid in the container has not submerged the port of the second gas channel, the liquid flowing through the first gas channel causes a pressure drop at the port of the first gas channel. Gas in the gas channel flows from the port of the second gas channel to the port of the first gas channel. This flowing gas acts on the sensing element, causing the sensor to emit a first signal indicating that liquid has been injected into the liquid channel. When the liquid in the container submerges the port of the second gas channel, the gas flow in the gas channel stops. After the sensing element is no longer affected by the flowing gas, the sensor detects the sensing element and emits a second signal indicating that the container is full of liquid, effectively preventing liquid overflow. Furthermore, even when no liquid is injected into the inlet end of the nozzle body, the sensor can detect the sensing element and emit a second signal, ensuring that the sensing component can function normally and guaranteeing safe use.

[0028] The automatic filling device provided by the present invention controls the opening and closing of the solenoid valve through the first and second signals emitted by the sensor to achieve the purpose of automatic filling, which is safe and reliable.

[0029] The automatic dispensing container provided by this invention achieves the purpose of automatic dispensing of the container through the setting of an automatic dispensing device, which is safe and reliable. Attached Figure Description

[0030] Figure 1 This is a cross-sectional view of the injection tube head provided by the present invention;

[0031] Figure 2 This invention provides Figure 1 Enlarged view of the structure of the container at point C, whether it is filled with liquid or not;

[0032] Figure 3 This invention provides Figure 1 Enlarged view of the structure at point C where the container was not full during liquid injection;

[0033] Figure 4 This is a cross-sectional view of the automatic dispensing container provided by the present invention.

[0034] In the picture:

[0035] 100. Pipe head body; 101. Liquid pipe; 102. Gas pipe; 103. Insulation layer; 110. Liquid channel; 111. First liquid channel; 112. Second liquid channel; 113. First conical channel; 114. Third liquid channel; 115. Second conical channel; 120. Gas channel; 121. First gas channel; 122. Second gas channel; 123. Guide groove; 1231. Shell; 130. Limiting component; 131. Exhaust port; 140. Guide post;

[0036] 200, Sensing component; 210, Sensing element; 211, Magnetic ring; 212, First sliding sleeve; 213, Second sliding sleeve; 220, Sensor; 221, First magnetic switch; 222, Second magnetic switch; 230, Elastic element;

[0037] 300. Filling pipe;

[0038] 400. Solenoid valve;

[0039] 500, Controller;

[0040] 600. Container; 610. Liquid injection hole. Detailed Implementation

[0041] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0042] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0045] Reference Figures 1 to 4 As shown, this embodiment provides a liquid injection tube head, which includes a tube head body 100 and a sensing component 200.

[0046] Specifically, the tube head body 100 includes a liquid channel 110 and a gas channel 120. The liquid outlet end of the tube head body 100 can be inserted into the container 600. The liquid channel 110 extends along the axial direction of the tube head body 100 and passes through the liquid inlet end and the liquid outlet end of the tube head body 100. The gas channel 120 includes a first gas channel 121 and a second gas channel 122 that are interconnected. The included angle α between the first gas channel 121 and the liquid channel 110 is ≤90°. The port of the first gas channel 121 is connected to the periphery of the liquid channel 110. The second gas channel 122 extends along the axial direction of the tube head body 100 and passes through the liquid outlet end of the tube head body 100. The second gas channel 122 is provided with a guide groove 123 that extends along the axial direction of the tube head body 100. The sensing component 200 includes a sensing element 210 that is slidably disposed in the guide groove 123 and a sensor 220 disposed on the tube head body 100.

[0047] When liquid is injected into the liquid channel 110 and the liquid in the container 600 does not submerge the port of the second gas channel 122, the gas in the gas channel 120 flows from the port of the second gas channel 122 to the port of the first gas channel 121. The flowing gas enables the sensor 220 to sense the sensing element 210 and send out the first signal.

[0048] Specifically, when liquid is injected into the liquid channel 110 and the liquid in the container 600 does not exceed the port of the second gas channel 122, or when no liquid is injected into the liquid channel 110, the sensor 220 can sense the sensing element 210 and send a second signal.

[0049] In this embodiment, the outlet end of the tube head body 100 can be inserted into the container 600, and then liquid is injected into the liquid channel 110 through the inlet end of the tube head body 100, that is, liquid is injected through the inlet of the liquid channel 110. The arrows in the figure indicate the direction of liquid flow. Because the angle α between the first gas channel 121 and the liquid channel 110 is ≤90°, the liquid will not flow from the first gas channel 121 into the second gas channel 122. For example, when the liquid in the container 600 has not submerged the port of the second gas channel 122... Figure 4 At position A of the liquid level, when the liquid in the liquid channel 110 flows through the port of the first gas channel 121, a pressure drop occurs at the port of the first gas channel 121 according to the Venturi effect. The pressure in the second gas channel 122 is greater than the pressure in the first gas channel 121. The gas in the gas channel 120 flows from the port of the second gas channel 122 to the port of the first gas channel 121. The flowing gas acts on the sensing element 210, causing the sensor 220 to emit a first signal to indicate that liquid has been injected into the liquid channel 110. When the liquid in the container 600 exceeds the port of the second gas channel 122, such as... Figure 4 The liquid level B in the container blocks the second gas channel 122, making the pressure in the second gas channel 122 equal to the pressure in the first gas channel 121. Gas flow in the gas channel 120 stops. After the sensing element 210 is removed from the flow of gas, the sensor 220 detects the sensing element 210 and sends a second signal to indicate that the container 600 is full of liquid, effectively preventing liquid overflow. Furthermore, even when no liquid is injected into the inlet end of the nozzle body 100, the sensor 220 can still detect the sensing element 210 and send a second signal to ensure the sensing component 200 functions properly and guarantees safe use. The injection nozzle structure is simple and has low manufacturing cost.

[0050] For example, the liquids injected into container 600 through the injection nozzle include, but are not limited to, liquid nitrogen and liquid hydrogen. It is worth noting that the injection nozzle is suitable for adding liquid nitrogen in a gas-liquid mixture.

[0051] For example, the injection nozzle can be applied to an aluminum liquid nitrogen tank or other liquid storage container.

[0052] In one feasible implementation, along the axial direction of the pipe head body 100, the port of the gas channel 120 protrudes beyond the outlet of the liquid channel 110, or the port of the gas channel 120 is flush with the outlet of the liquid channel 110, to prevent liquid from overflowing from the container 600.

[0053] In one feasible implementation, a limiting member 130 is provided on the outer periphery of the tube head body 100. The limiting member 130 is used to abut against the container 600 to limit the depth of the tube head body 100 inserted into the container 600, thereby determining the stop position of liquid injection in the container 600. The container 600 is provided with an injection hole 610. The limiting member 130 abuts against the injection hole 610 to reduce or prevent gas from flowing out between the limiting member 130 and the injection hole 610. When liquid is injected into the liquid channel 110 from the liquid inlet end of the tube head body 100, the gas pressure in the container 600 increases, and the gas in the container 600 is forced to enter better through the second gas channel 122 and flow towards the first gas channel 121.

[0054] For example, the limiting member 130 is adjustable along the axial direction of the pipe head body 100. Specifically, the limiting member 130 can be configured as an annular or T-shaped sleeve, and the limiting member 130 can be connected to the pipe head body 100 by means of a threaded connection.

[0055] For example, to ensure that the gas in the container 600 can be discharged during liquid injection without affecting the gas entering from the second gas channel 122 and flowing towards the first gas channel 121, an exhaust port 131 can be provided on the limiting member 130. Optionally, a one-way exhaust valve can be provided on the exhaust port 131.

[0056] In this embodiment, reference is made to Figure 1 As shown, the liquid channel 110 includes a first liquid channel 111 and a second liquid channel 112 sequentially from the inlet to the outlet. The cross-section of the first liquid channel 111 is larger than that of the second liquid channel 112. The port of the first gas channel 121 is connected to the periphery of the second liquid channel 112. In this embodiment, when the liquid flows from the first liquid channel 111 to the second liquid channel 112, the liquid in the second liquid channel 112 will accelerate. According to Bernoulli's law and the Venturi effect, the increase in flow velocity is accompanied by a decrease in fluid pressure. This is more suitable for the gas in the gas channel 120 to flow from the port of the second gas channel 122 to the port of the first gas channel 121, so that the flowing gas acts more stably on the sensing element 210, and the sensor 220 stably emits the first signal.

[0057] For example, the first liquid channel 111 and the second liquid channel 112 can be smoothly transitioned to ensure the stability of the liquid flow within the liquid channel 110.

[0058] For example, the first liquid channel 111 and the second liquid channel 112 are transitioned by a first tapered channel 113.

[0059] In one feasible embodiment, the liquid channel 110 further includes a third liquid channel 114 communicating with the second liquid channel 112. The cross-section of the third liquid channel 114 is larger than that of the second liquid channel 112 to reduce the liquid flow rate and effectively prevent splashing of the liquid injected into the container 600. It is understood that the first liquid channel 111, the second liquid channel 112, and the third liquid channel 114 are sequentially connected along the axial direction of the tube head body 100.

[0060] For example, the second liquid channel 112 and the third liquid channel 114 can be smoothly transitioned to ensure the stability of the liquid flow within the liquid channel 110.

[0061] For example, the second liquid channel 112 and the third liquid channel 114 are transitioned by a second tapered channel 115.

[0062] Optionally, the cross-section of the first liquid channel 111 and the cross-section of the third liquid channel 114 are equal, and the axial length of the first tapered channel 113 along the pipe head body 100 is less than the axial length of the second tapered channel 115 along the pipe head body 100, so as to reduce the energy loss of liquid flowing through the second liquid channel 112 and make the liquid flow more smoothly to the third liquid channel 114, effectively preventing liquid splashing in the injection container 600.

[0063] In some embodiments, sensor 220 is configured as a pressure sensor (not shown), which is disposed within guide groove 123 and located on the side of sensing element 210 facing the liquid inlet end of tube head body 100. In this embodiment, when gas in gas channel 120 flows from port of second gas channel 122 to port of first gas channel 121, the flowing gas lifts sensing element 210, causing sensing element 210 to tend to move away from or detach from pressure sensor, thereby reducing the force exerted on pressure sensor by sensing element 210, and pressure sensor emits a first signal, which is stable and reliable; when liquid blocks port of second gas channel 122 or when no liquid is injected into liquid channel 110, sensing element 210 acts on pressure sensor by its own weight, and pressure sensor emits a second signal.

[0064] In some embodiments, such as Figure 2 and Figure 3As shown, the sensing element 210 is configured as a magnetic ring 211, and the sensor 220 is configured as a first magnetic switch 221 and a second magnetic switch 222. The first magnetic switch 221 and the second magnetic switch 222 are arranged alternately from the liquid inlet end to the liquid outlet end along the axial direction of the tube head body 100, and both the first magnetic switch 221 and the second magnetic switch 222 are located on one side of the guide groove 123. In this embodiment, when the gas in the gas channel 120 flows from the port of the second gas channel 122 to the port of the first gas channel 121, the flowing gas will lift the sensing element 210 to slide opposite the first magnetic switch 221, such as... Figure 3 As shown, the first magnetic switch 221 sends a first signal; when liquid blocks the port of the second gas channel 122 or when no liquid is injected into the liquid channel 110, such as... Figure 2 As shown, the sensing element 210 relies on its own weight to be opposite to the second magnetic switch 222, and the second magnetic switch 222 emits a second signal.

[0065] For example, a gap is formed between the sensing element 210 and the guide groove 123. It is understood that the sensing element 210 and the guide groove 123 can be a shaft-hole clearance fit. When the liquid blocks the port of the second gas channel 122 or when no liquid is injected into the liquid channel 110, the sensing element 210 can be located at the end of the guide groove 123 facing the liquid outlet end of the tube head body 100.

[0066] Of course, the sensing component 200 can also be in other structural forms, which are not limited in this application.

[0067] In this embodiment, reference is made to Figure 2 and Figure 3 As shown, to ensure stable and reliable sliding of the sensing element 210 within the guide groove 123, a guide post 140 is provided within the guide groove 123, and the sensing element 210 is sleeved on the guide post 140. It is understood that a gap may exist between the sensing element 210 and the guide post 140; the connection between the sensing element 210 and the guide post 140 can be a shaft-hole clearance fit.

[0068] For example, to reduce the sliding friction between the sensing element 210 and the wall of the guide groove 123, a first sliding sleeve 212 is provided outside the magnetic ring 211, and the magnetic ring 211 slides in contact with the guide groove 123 through the first sliding sleeve 212. Optionally, the material of the first sliding sleeve 212 can be polytetrafluoroethylene, PEEK, POM, ultra-high molecular weight polyethylene or other composite materials with good self-lubricating properties.

[0069] For example, to reduce sliding friction between the sensing element 210 and the guide post 140, a second sliding sleeve 213 is provided inside the magnetic ring 211, through which the magnetic ring 211 slides in contact with the guide post 140. Optionally, the material of the second sliding sleeve 213 can be polytetrafluoroethylene, PEEK, POM, ultra-high molecular weight polyethylene, or other composite materials with good self-lubricating properties.

[0070] In this embodiment, reference continues to be made to... Figure 2 and Figure 3 As shown, to ensure the accuracy of the signal emitted by the sensor 220, an elastic element 230 is provided in the guide groove 123. The elastic element 230 is located on the side of the sensing element 210 away from the liquid inlet end of the tube head body 100. The elastic element 230 makes the sensing element 210 always tend to slide towards the liquid outlet end of the tube head body 100. When the gas in the gas channel 120 stops flowing, the sensing element 210 can be quickly reset to the end of the guide groove 123 facing the liquid outlet end of the tube head body 100, so as to improve the response speed of the sensor 220.

[0071] For example, the elastic element 230 can be a spring.

[0072] In this embodiment, reference is made to Figure 1 As shown, the main body 100 includes a liquid pipe 101, a gas pipe 102, and an insulation layer 103 covering the liquid pipe 101 and the gas pipe 102 to improve safety. The liquid pipe 101 includes a liquid channel 110, and the gas pipe 102 includes a gas channel 120. When the liquid is liquid nitrogen, this reduces liquid nitrogen evaporation and enhances the Venturi effect.

[0073] For example, the guide groove 123 can be formed by a housing 1231 to make the sensing element 210 suitable for placement into the guide groove 123 and to facilitate the assembly and forming of the liquid injection tube head. The housing 1231 is located within the heat insulation layer 103.

[0074] It is worth mentioning that the cross-section of one end of the second gas channel 122 is greater than or equal to the cross-section at the junction of the second gas channel 122 and the guide groove 123. When liquid is injected into the liquid channel 110 from the inlet end of the pipe head body 100, the gas in the container 600 is forced to enter through the second gas channel 122 and flow towards the first gas channel 121 more effectively. The port of the second gas channel 122 can be enclosed by the insulation layer 103 and the liquid pipe 101.

[0075] This embodiment also provides an automatic dispensing device, see reference. Figures 1 to 4As shown, the automatic dispensing device includes a dispensing pipe 300, a solenoid valve 400, and the aforementioned injection nozzle. The solenoid valve 400 is located at the first end of the dispensing pipe 300, and the injection nozzle is located at the second end. A sensor 220 on the injection nozzle is electrically connected to the solenoid valve 400. The sensor 220 sends a first signal and a second signal to control the opening and closing of the solenoid valve 400, thereby achieving automatic dispensing with safety and reliability.

[0076] For example, the automatic dispensing device is detachably connected to the container 600, meaning that one automatic dispensing device can dispense multiple containers 600.

[0077] For example, the filling tube 300 can be a vacuum tube. Taking the filling of liquid nitrogen as an example, the vacuum jacket structure of the vacuum tube can effectively reduce liquid nitrogen loss.

[0078] Specifically, the automatic filling device also includes a controller 500. The solenoid valve 400 is electrically connected to the sensor 220 through the controller 500. When it is necessary to fill the container 600 with liquid, the solenoid valve 400 is opened by the controller 500 or manually. The liquid is injected into the container 600 sequentially through the solenoid valve 400, the filling pipe 300, and the filling pipe head. During the filling process, if liquid flows through the filling pipe head and the liquid does not submerge the port channel of the second gas, the sensor 220 sends a first signal to the controller 500. The controller 500 can display the signal that liquid is being filled through the host computer, indicator lights, etc., and the solenoid valve 400 remains open. When the liquid submerges the port channel of the second gas, the controller 500 receives the second signal from the sensor 220 and controls the solenoid valve 400 to close, completing the filling process. In addition, if the controller 500 does not receive the first signal from the sensor 220 after the solenoid valve 400 has been open for a period of time, the controller 500 can issue an alarm signal through the host computer, indicator lights, buzzer, etc., and control the solenoid valve 400 to close, thereby improving safety.

[0079] This embodiment also provides an automatic dispensing container, see reference. Figures 1 to 4 As shown, the automatic dispensing container includes a container 600 and the aforementioned automatic dispensing device. The dispensing tube of the automatic dispensing device is inserted into the container 600. By setting up the automatic dispensing device, the container 600 can be automatically dispensed, which is safe and reliable.

[0080] It is worth mentioning that a liquid level sensor (not shown) and / or a temperature sensor (not shown) may be installed inside the container 600. For example, when the liquid level inside the container 600 is lower than... Figure 4 When the liquid level reaches level A, the level sensor and / or temperature sensor will send a filling signal to the controller 500, and the controller 500 will control the solenoid valve 400 to open.

[0081] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A liquid injection tube head, characterized in that, include: The tube head body (100) includes a liquid channel (110) and a gas channel (120). The liquid outlet end of the tube head body (100) can be inserted into a container (600). The liquid channel (110) extends along the axial direction of the tube head body (100) and passes through the liquid inlet end and the liquid outlet end of the tube head body (100). The gas channel (120) includes a first gas channel (121) and a second gas channel (122) that are interconnected. The included angle α between the first gas channel (121) and the liquid channel (110) is ≤90°. The port of the first gas channel (121) is connected to the periphery of the liquid channel (110). The second gas channel (122) extends along the axial direction of the tube head body (100) and passes through the liquid outlet end of the tube head body (100). The second gas channel (122) is provided with a guide groove (123) extending along the axial direction of the tube head body (100). The sensing assembly (200) includes a sensing element (210) slidably disposed within the guide groove (123) and a sensor (220) disposed on the tube head body (100); wherein, When liquid is injected into the liquid channel (110) and the liquid in the container (600) does not submerge the port of the second gas channel (122), the gas in the gas channel (120) flows from the port of the second gas channel (122) toward the port of the first gas channel (121). The flowing gas enables the sensor (220) to sense the sensing element (210) and send out a first signal. When liquid is injected into the liquid channel (110) and the liquid in the container (600) exceeds the port of the second gas channel (122), or when no liquid is injected into the liquid channel (110), the sensor (220) can sense the sensing element (210) and send a second signal; The sensor (220) is configured as a pressure sensor, which is located within the guide groove (123) and situated on the side of the sensing element (210) facing the liquid inlet end of the tube head body (100); or The sensing element (210) is configured as a magnetic ring (211), and the sensor (220) is configured as a first magnetic switch (221) and a second magnetic switch (222). The first magnetic switch (221) and the second magnetic switch (222) are arranged sequentially from the liquid inlet end to the liquid outlet end along the axial direction of the tube head body (100), and the first magnetic switch (221) and the second magnetic switch (222) are both located on one side of the guide groove (123).

2. The injection tube head according to claim 1, characterized in that, The liquid channel (110) includes a first liquid channel (111) and a second liquid channel (112) from the inlet end to the outlet end. The cross-section of the first liquid channel (111) is larger than the cross-section of the second liquid channel (112). The port of the first gas channel (121) is connected to the periphery of the second liquid channel (112).

3. The injection tube head according to claim 1, characterized in that, The guide groove (123) is provided with an elastic element (230), which is located on the side of the sensing element (210) away from the liquid inlet end of the tube head body (100).

4. The injection tube head according to claim 1, characterized in that, The guide groove (123) is provided with a guide post (140), and the sensing element (210) is sleeved on the guide post (140).

5. The injection tube head according to claim 1, characterized in that, The main body (100) of the pipe head includes a liquid pipe (101), a gas pipe (102), and an insulation layer (103) covering the liquid pipe (101) and the gas pipe (102); wherein, The liquid tube (101) includes the liquid channel (110), and the gas tube (102) includes the gas channel (120).

6. The injection tube head according to claim 1, characterized in that, The outer periphery of the tube head body (100) is provided with a limiting member (130), which is used to abut against the container (600).

7. An automatic dispensing device, characterized in that, include: Filling tube (300); A solenoid valve (400) is located at the first end of the filling pipe (300); The injection tube head as described in any one of claims 1-6 is located at the second end of the injection tube (300), and the sensor (220) of the injection tube head is electrically connected to the solenoid valve (400).

8. An automatic dispensing container, characterized in that, include: Container (600); The automatic dispensing device as described in claim 7, wherein the dispensing tube of the automatic dispensing device is inserted into the container (600).

Images