Liquid diversion device and aromatherapy machine

Abstract

The present invention discloses a liquid diversion device and an aromatherapy machine, wherein the liquid diversion device comprises an air pump, a pipeline, a switch element and a diversion structure. The present invention aims to improve the efficiency of liquid delivery and recovery, and the delivery and recovery operations are convenient and have higher flexibility; the aromatherapy machine adopting the structure has multiple advantages such as liquid diversion, precise reflux, air pressure regulation and automatic control, which improves the atomization effect and aromatherapy durability of the aromatherapy machine, and also provides a more stable and convenient use experience through efficient liquid flow and intelligent control system.

Description

Technical Field

[0001] The invention relates to the technical field of fluid diversion sealing, and in particular to a liquid diversion device and an aromatherapy machine. Background Art

[0002] Liquid guide devices are widely used in industrial and household equipment and automation systems, especially in liquid transportation, storage, reflux control, etc. With the advancement of technology and the increase in automation needs, the performance and precision requirements of liquid guide devices are gradually increasing, especially in some fields that require high efficiency, intelligence and precision, such as aromatherapy machines, liquid filling systems, chemical processing and pharmaceutical industries.

[0003] Traditional liquid diversion systems usually use manual valves, mechanical pumps or other mechanical control elements to control liquid flow, which makes the control accuracy of liquid flow low and easily causes over-flow or under-flow, affecting system efficiency.

[0004] In addition, since some aromatherapy liquids contain easily corrosive components and are oily liquids, if manual valves, mechanical pumps, peristaltic pumps, etc. are used to control the flow of the liquid, oil will accumulate on the valves or pump bodies over time. Coupled with the corrosive effect of the easily corrosive components, the service life of the relevant valves or pump bodies will be affected, and the aromatherapy effect of the aromatherapy machine will also be affected. Summary of the invention

[0005] The first main purpose of the present invention is to provide a liquid diversion device, which aims to improve the efficiency of liquid transportation and recovery, and the transportation and recovery operations are convenient and have higher flexibility.

[0006] To achieve the above objectives, the present invention proposes the following technical solutions.

[0007] In a first aspect, the present invention provides a liquid diversion device for diverting liquid in an external liquid storage device, comprising an air pump, a pipeline, a switch element and a diversion structure, wherein the air pump is conductively connected to the external liquid storage device through the pipeline;

[0008] The switch element is connected to the pipeline and controls the sealing and opening between the air pump and the external liquid storage device;

[0009] The guide structure is used to connect with the external liquid holding device, and the guide structure includes a liquid outlet channel for communicating with the external liquid holding device, a liquid storage portion after the liquid flows out of the external liquid holding device, and a reflux channel connecting the liquid storage portion and the external liquid holding device, and a sealing member is provided in the reflux channel;

[0010] The sealing member realizes the flow of liquid from the liquid storage portion into the external liquid holding device through the reflux channel through the change of the air pressure in the external liquid holding device, or seals the reflux channel to prevent gas from flowing out of the reflux channel.

[0011] In a possible embodiment, the reflux channel includes a limiting section and a reflux section. When the seal is located in the reflux section, the liquid can flow from the liquid storage part into the external liquid holding device through the reflux channel. When the seal is located at the transition position between the limiting section and the reflux section, a sealed isolation is formed between the reflux channel and the liquid storage part.

[0012] In a possible implementation manner, the sealing member is any one of a sealing ball, a sealing strip, a sealing block, and a sealing cylinder.

[0013] In a possible implementation, the liquid outlet channel includes an internal section extending into the external liquid storage device and an extension section located on the flow guiding structure, the internal section and the extension section are connected to each other and are in an integrally formed shape or a separately connected structure.

[0014] In a possible implementation manner, the pipeline is a three-way pipeline, one end of the three-way pipeline is conductively connected to the air pump, one end is conductively connected to the switch element, and the other end is conductively connected to the external liquid holding device.

[0015] In a possible implementation, the switch element is any one of a solenoid valve, a pneumatic valve, a mechanical valve, and a hydraulic valve.

[0016] In a possible implementation, a limiting structure is provided at one end of the reflux channel facing the external liquid containing device, and the limiting structure is provided with a plurality of vent holes.

[0017] The technical solution of the present invention uses an air pump to regularly adjust the air pressure in the external liquid holding device as needed. When the air pressure in the liquid holding device is higher than the liquid storage part, the liquid is transported upward from the liquid holding device to the liquid storage part; when the air pressure in the liquid holding device decreases or forms a negative pressure, the liquid flows back from the liquid storage part to the liquid holding device. In this way, the liquid can circulate freely up and down between the liquid holding device and the liquid storage part, and the seal ensures the airtightness of the whole process to prevent gas leakage or liquid from being unable to flow back.

[0018] At the same time, the liquid diversion is achieved by controlling the air pressure inside the liquid holding device. For diverting liquids containing corrosive substances and oily liquids that are easy to adhere, the liquids will not cause oil hanging and corrosion to the diversion structure, thereby ensuring the stability, reliability and long service life of the diversion.

[0019] The second object of the present invention is to provide an aromatherapy machine, which aims to ensure that the fragrance liquid can be stably and evenly atomized and output, and prevent the fragrance liquid from volatilizing and external air from entering, thereby affecting the fragrance release effect of the device.

[0020] To achieve the above-mentioned purpose, in a second aspect, the present invention provides an aromatherapy machine, comprising a main body shell, wherein the main body shell is provided with a liquid diversion device as described in any possible embodiment above, the liquid outlet channel is connected to an atomization channel, an atomization structure is provided below the atomization channel away from one end of the liquid outlet channel, and an atomization module for atomizing the liquid on the atomization structure is provided in the main body shell.

[0021] The technical solution of the present invention combines the design of an aromatherapy machine with a liquid diversion device, and has multiple advantages such as liquid diversion, precise reflux, air pressure regulation and automatic control. This design not only improves the atomization effect and aromatherapy durability of the aromatherapy machine, but also provides a more stable and convenient user experience through efficient liquid flow and intelligent control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of the internal structure of an embodiment of a liquid guiding device of the present invention;

[0024] Figure 2 A cross-sectional view of an embodiment of a liquid holding device of the present invention;

[0025] Figure 3 It is a schematic diagram of the overall structure of an embodiment of a liquid guiding device of the present invention;

[0026] Figure 4 This is a schematic structural diagram of an embodiment of an aromatherapy machine of the present invention;

[0027] Figure 5 It is a cross-sectional view of an embodiment of the aromatherapy machine of the present invention.

[0028] Description of Figure Numbers:

[0029] 100, liquid guiding device; 10, external liquid storage device; 20, guiding structure; 21, liquid outlet channel; 211, built-in section; 212, extension section; 22, liquid storage section; 23, reflux channel; 231, sealing element; 232, limiting section; 233, reflux section; 234, limiting structure; 30, pipeline; 40, switch element; 50, air pump; 200, aromatherapy machine; 201, main unit housing; 202, atomization structure.

[0030] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] Embodiment 1

[0033] Combined with reference Figures 1 to 3 As shown, Figure 1 Schematic diagram of the internal structure of an embodiment of the liquid guiding device of the present invention. Figure 2 is a cross-sectional view of an embodiment of a liquid holding device of the present invention, Figure 3 This is a schematic diagram of the overall structure of an embodiment of a liquid diversion device of the present invention. It should be noted that the overall structure schematic diagram here is a schematic diagram of the structure of the liquid diversion device 100 after installation, wherein the air pump 50, the pipeline 30, the switch element 40 and the diversion structure 20 are all integrated and installed inside through the outer shell structure. The present invention provides a liquid diversion device 100, which is used to divert liquid in a liquid forming device 10, and includes an air pump 50, a pipeline 30, a switch element 40 and a diversion structure 20. The air pump 50 is connected to the liquid forming device 10 through the pipeline 30; the switch element 40 is connected to the pipeline 30 and controls the sealing and opening between the air pump 50 and the liquid forming device 10; the diversion structure 20 is used to be connected to the liquid forming device 10, and the diversion structure 20 includes a liquid outlet channel 21 for being connected to the liquid forming device 10, a liquid storage part 22 after the liquid flows out of the liquid forming device 10, and a reflux channel 23 connecting the liquid storage part 22 and the liquid forming device 10, and a sealing member 231 is arranged in the reflux channel 23; the sealing member 231 realizes that the liquid flows from the liquid storage part 22 into the liquid forming device 10 through the reflux channel 23 through the change of the air pressure in the liquid forming device 10, or seals the reflux channel 23 to prevent the gas from flowing out of the reflux channel 23.

[0034] Combined with reference Figure 1 and Figure 2As shown, the liquid diversion device 100 proposed in this embodiment is mainly used to control the flow of fluid between the liquid forming device 10 and the liquid storage part 22, and realizes the circulation and reflux of the fluid by controlling the floating or falling of the sealing member 231. The liquid to be transported is stored in the liquid forming device 10, and the diversion structure 20 connects the liquid forming device 10 and the liquid storage part 22. The diversion structure 20 includes a liquid outlet channel 21 and a reflux channel 23. One end of the diversion channel is inserted into the external liquid forming device 10, and the other end is connected to the liquid storage part 22, which is used to transport the liquid in the external liquid forming device 10 to the liquid storage device; the reflux channel 23 connects the liquid storage part 22 and the external liquid forming device 10, and a sealing member 231 is arranged in the reflux channel 23. Gas is injected into the external liquid forming device 10 through the air pump 50 to increase the air pressure inside the external liquid forming device 10. When the air pressure rises to exceed the fluid pressure of the liquid, the liquid is pushed and flows to the liquid storage device through the diversion tube. In order to ensure that the liquid can flow back to the external liquid forming device 10, the present embodiment designs a reflux channel 23, in which a seal 231 is provided, and the seal 231 may be spherical. The function of the seal 231 is to float or fall by controlling the air pressure and the liquid pressure, thereby closing or opening the reflux channel 23, and preventing or allowing the liquid to flow back from the liquid storage part 22 to the external liquid forming device 10. The reflux channel 23 is also provided with an air vent for releasing excess air pressure, so that the sealing ball can accurately control the reflux process when the pressure changes.

[0035] In a possible embodiment, the reflux channel 23 includes a limiting section 232 and a reflux section 233. When the seal 231 is located in the reflux section 233, the liquid can flow from the liquid storage portion 22 into the liquid forming device 10 through the reflux channel 23. When the seal 231 is located at the transition portion between the limiting section 232 and the reflux section 233, a sealed isolation is formed between the reflux channel 23 and the liquid storage portion 22.

[0036] Combined with reference Figure 2As shown, in this embodiment, the reflux channel 23 adopts a combination design of a limiting section 232 and a reflux section 233. The seal 231 is arranged in the reflux channel 23. When the system is in a balanced state, the seal 231 falls back to the position of the reflux section 233 due to its weight, and the excess liquid in the liquid storage part 22 can enter the external liquid forming device 10 through the reflux channel 23. However, when the air pump 50 inflates the external liquid forming device 10, the increase in air pressure will gradually lift the seal 231, forming a floating mechanism for controlling the seal. As the pressure continues to increase, the seal 231 leaves the reflux section 233 and floats to the limiting section 232, blocking the reflux channel 23 and preventing the liquid from flowing to the liquid storage device. The reflux section 233 is provided with a plurality of vents, which allow air to flow freely when the air pressure changes, help maintain the pressure balance of the system, and ensure that the seal 231 can be flexibly opened and closed according to the changes in air pressure and liquid pressure. The air leakage holes are also provided to quickly discharge excess air pressure during the liquid reflux process to avoid affecting the normal reflux of the liquid due to excessive air pressure. This design ensures that the liquid can smoothly flow back from the liquid storage device to the external liquid forming device 10 after the pressure drops.

[0037] In a possible implementation manner, the sealing member 231 is any one of a sealing ball, a sealing strip, a sealing block, and a sealing column.

[0038] In this embodiment, the shape of the sealing member 231 may be spherical, strip-shaped, block-shaped or cylindrical.

[0039] In a possible implementation, the liquid outlet channel 21 includes an internal section 211 extending into the liquid forming device 10 and an extension section 212 located on the flow guiding structure 20 . The internal section 211 and the extension section 212 are connected to each other and are integrally formed or separately connected.

[0040] In this embodiment, the liquid outlet channel 21 can be an integrally formed setting or a split setting, and the built-in section 211 extending into the liquid forming device 10 can be plugged into the extension section 212, or be integrally formed with the extension section 212. The built-in section 211 is inserted into the liquid forming device 10 to introduce the liquid into the liquid storage section 22 through the extension section 212.

[0041] In a possible implementation, the pipeline 30 is a three-way pipeline 30 , one end of the three-way pipeline 30 is conductively connected to the air pump 50 , one end is conductively connected to the switch element 40 , and the other end is conductively connected to the liquid forming device 10 .

[0042] In the present embodiment, the pipeline 30 adopts a three-way pipeline 30 structure and has three pipeline 30 connection ports. The first end of the three-way pipeline 30 is conductively connected to the output end of the air pump 50 to ensure that the airflow provided by the air pump 50 can enter the pipeline 30 system through the port; the second end is connected to the switch element 40, which is used to control the flow of the fluid and can open and close the fluid channel as needed, thereby regulating the delivery and reflux of the fluid; the third end is conductively connected to the external external liquid forming device 10 to allow the fluid (such as liquid or gas) to be transmitted from the liquid forming device 10 to the liquid storage part 22. Through this three-way pipeline 30 design, the transmission path of the airflow or liquid flow can be flexibly adjusted under different working conditions. Specifically, the air pump 50 can push the fluid through the control of the switch element 40 during operation to achieve automatic transmission or regulation of the fluid in the external liquid forming device 10.

[0043] In a possible implementation manner, the switch element 40 is any one of a solenoid valve, a pneumatic valve, a mechanical valve, and a hydraulic valve.

[0044] In this embodiment, the function of the switch element 40 is to control the flow and stop of the fluid in the pipeline 30, and its type can be selected according to different application requirements. Specifically, the switch element 40 can be any of the following:

[0045] Solenoid valve: Solenoid valve uses the action of electromagnet to control the opening and closing of the valve core. It is widely used in occasions where the flow rate and flow direction of the fluid need to be accurately controlled. The solenoid valve has a fast response speed and is suitable for automatic control systems. It can complete the opening or closing operation in a short time.

[0046] Pneumatic valves: Pneumatic valves use air pressure to drive the valve to open and close, and are suitable for large flow or high pressure environments. Pneumatic valves are easy to operate and highly reliable, and are often used in industrial automation systems, especially in hydraulic or pneumatic control systems.

[0047] Mechanical valve: Mechanical valves control the opening and closing of fluid channels by mechanical means (such as manual or mechanical devices). Such valves usually do not require external power supply and are suitable for certain occasions with low requirements for power or gas sources, such as manual control or remote mechanical operation environments.

[0048] Hydraulic valves: Hydraulic valves use liquid pressure to drive the opening and closing of valves. They are commonly used in liquid transmission systems and can provide high-precision flow control. They are suitable for scenarios that require precise regulation of liquid flow.

[0049] In a possible implementation, a limiting structure 234 is provided at one end of the reflux channel 23 facing the external liquid containing device 10 , and the limiting structure is provided with a plurality of vent holes.

[0050] In this embodiment, the multiple vents on the limiting structure 234 can provide a flow channel for the gas, which helps to balance the pressure difference between the liquid and the gas, and can effectively avoid the pressure accumulation of the gas due to too tight sealing or obstructed reflux, thereby ensuring the smoothness of the reflux channel and the stability of the liquid flow. The presence of the vent can form a certain airflow channel between the reflux channel and the external liquid holding device 10, so that the air pressure change can be smoothly transmitted to the seal of the reflux channel. The sealing and opening control of the reflux channel is made more precise, and the sealing performance and the control effect of liquid reflux can be further optimized by carefully adjusting the size and number of the vents. The design of the limiting structure 234 and the vent limits the speed and direction of the liquid reflux in the reflux channel. By setting a plurality of vents, the balance of airflow and liquid flow during the liquid reflux process can be ensured, and the phenomenon of uneven or excessive reflux of the liquid during the reflux process can be avoided. This helps to maintain the stability of the liquid diversion and the working efficiency of the aromatherapy machine.

[0051] In summary, the working principle and process of the liquid guiding device 100 in the first embodiment are as follows:

[0052] Initial state: the air pump 50 , the pipeline 30 , the switch element 40 and the flow guiding structure 20 are connected to each other. The air pump 50 is connected to the external liquid holding device 10 through the pipeline 30 .

[0053] Diversion operation:

[0054] When diversion is required, the switch element 40 (such as a solenoid valve or a pneumatic valve) is opened, so that the air pump 50 can establish a connection with the external liquid containing device 10 through the pipeline 30, and the air pump 50 starts to work.

[0055] The air pump 50 transmits gas to the external liquid holding device 10 through the pipeline 30 , and uses the gas to push the liquid out of the external liquid holding device 10 and enter the liquid storage part 22 through the liquid outlet channel 21 .

[0056] Backflow control:

[0057] After the liquid flows out of the external liquid holding device 10 , the liquid enters the liquid storage portion 22 in the flow guiding structure 20 and flows back to the external liquid holding device 10 through the reflux channel 23 .

[0058] A sealing member 231 (such as a sealing ball, a sealing strip, a sealing block or a sealing cylinder) is provided in the reflux channel 23. According to the change of the air pressure in the external liquid holding device 10, the sealing member 231 will adjust its position to control whether the liquid can flow back to the external liquid holding device 10:

[0059] When the sealing member 231 is located at the reflux section 233 , liquid can flow into the external liquid holding device 10 through the reflux channel 23 .

[0060] When the sealing member 231 is located at the transition portion between the limiting section 232 and the reflux section 233 , sealing is achieved between the reflux channel 23 and the liquid storage portion 22 to prevent liquid from flowing into the external liquid storage device 10 .

[0061] Seal Control:

[0062] Through the operation of the air pump 50, the change of the air pressure in the external liquid holding device 10, and the action of the sealing member 231, the reflux channel 23 can be sealed or opened, thereby controlling the flow of the liquid.

[0063] The movement of the seal 231 can be precisely controlled by air pressure changes or other external signals to ensure the stability and accuracy of the liquid flow.

[0064] Switching between reflux and diversion:

[0065] As required, the liquid can be refluxed or diverted between the liquid storage portion 22 and the external liquid storage device 10. The working state of the air pump 50 is controlled by the switch element 40 to ensure smooth diversion and reflux of the liquid.

[0066] Embodiment 2

[0067] Combined with reference Figure 4 and Figure 5 As shown, the present invention also proposes an aromatherapy machine 200, which includes a main body housing 201 and a liquid guide device 100. The specific structure of the liquid guide device 100 refers to the above embodiment. Since the aromatherapy machine 200 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the liquid outlet channel 21 is connected to the atomization channel, and the atomization structure 202 is provided below the end of the atomization channel away from the liquid outlet channel 21, and the main body housing 201 is provided with an atomization module for atomizing the liquid on the atomization structure 202.

[0068] Combined with reference Figure 5 As shown, the aromatherapy machine 200 usually needs to guide the fragrance liquid out of the liquid storage device and atomize it to achieve the purpose of air purification or aromatherapy. Through the liquid diversion device 100 in the present invention, the fragrance liquid can realize automatic flow and circulation between the external liquid forming device 10 and the liquid storage device. For example, in the actual application of the aromatherapy machine 200, the fragrance liquid can be automatically transported to the atomizer through the above-mentioned diversion device, avoiding the trouble of users frequently adding liquid manually. Moreover, the design of the reflux channel 23 ensures that when the fragrance liquid in the liquid storage device is exhausted or the air pressure drops, the remaining fragrance liquid can automatically flow back to the external liquid forming device 10, thereby reducing liquid waste.

[0069] In summary, the working principle and process of the aromatherapy machine 200 in the second embodiment are as follows:

[0070] Functions of the liquid guiding device 100:

[0071] Activation of the air pump 50: The air pump 50 in the aromatherapy machine 200 is connected to the external liquid holding device 10 (usually a fragrance liquid container) through the pipeline 30. After the air pump 50 is activated, the air pump 50 provides power for the liquid diversion.

[0072] Liquid flow control: The switch element 40 (such as a solenoid valve or a pneumatic valve) is located in the pipeline 30 to control the sealing and opening between the air pump 50 and the external liquid storage device 10. When the air pump 50 is turned on, the liquid flows out of the liquid storage device through the liquid outlet channel 21 and enters the diversion system of the aromatherapy machine 200.

[0073] Liquid diversion and storage management:

[0074] Liquid discharge and liquid storage function: Liquid first flows into the liquid storage part 22 through the liquid discharge channel 21. After the liquid leaves the external liquid storage device 10, the liquid storage part 22 is used to temporarily store the liquid and is connected to the external liquid storage device 10 through the reflux channel 23.

[0075] Reflux control: A sealing member 231 (such as a sealing ball, a sealing strip, etc.) is provided in the reflux channel 23. The position of the sealing member 231 is controlled by the air pressure change in the external liquid holding device 10. When the air pressure changes, the sealing member 231 can move to achieve reflux or sealing of the liquid, prevent gas leakage and control the flow direction of the liquid.

[0076] Atomization process:

[0077] Function of the atomization channel: The liquid guiding device 100 introduces the liquid into the atomization channel, and the liquid enters the atomization module near the atomization structure 202. The atomization module converts the liquid into fine mist through ultrasound, heating or other methods.

[0078] Atomization and aroma release: The atomization structure 202 atomizes the liquid and converts the liquid into atomized gas, which is sprayed out in the form of tiny particles, thereby achieving the effect of the aromatherapy machine 200 releasing the aroma.

[0079] Coordination of air pressure regulation and sealing function:

[0080] Function of the seal 231: The sealing of the liquid flow and reflux channel 23 is controlled by the air pressure change of the external liquid storage device 10, ensuring the sealing of the liquid diversion system and the smoothness of liquid transmission. The position change of the seal 231 determines whether the liquid is discharged or refluxed to the liquid storage device.

[0081] The liquid flow guide device 100 can also be applied to other occasions that require liquid circulation, such as automated agricultural irrigation systems, automatic delivery equipment for laboratory chemical liquids, and even for the circulation and delivery of medicinal liquids in medical equipment. In addition, in practical applications, sensors can be added to monitor the flow, air pressure, and liquid level of the liquid, and these data can be connected to the intelligent control system to achieve full automatic control of the liquid delivery process. This expansion can not only improve the work efficiency of the system, but also greatly reduce manual intervention and maintenance costs.

[0082] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0083] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A liquid diversion device for diverting liquid in an external liquid storage device, characterized in that: It includes an air pump, a pipeline, a switch element and a flow guiding structure, wherein the air pump is connected to an external liquid containing device through the pipeline; The switch element is connected to the pipeline and controls the sealing and opening between the air pump and the external liquid storage device; The guide structure is used to connect with the external liquid holding device, and the guide structure includes a liquid outlet channel for communicating with the external liquid holding device, a liquid storage portion after the liquid flows out of the external liquid holding device, and a reflux channel connecting the liquid storage portion and the external liquid holding device, and a sealing member is provided in the reflux channel; The sealing member realizes the flow of liquid from the liquid storage portion into the external liquid holding device through the reflux channel through the change of the air pressure in the external liquid holding device, or seals the reflux channel to prevent gas from flowing out of the reflux channel.

2. The liquid guiding device according to claim 1, characterized in that: The reflux channel includes a limiting section and a reflux section. When the seal is located in the reflux section, the liquid can flow from the liquid storage part through the reflux channel into the external liquid holding device. When the seal is located at the transition position between the limiting section and the reflux section, a sealed isolation is formed between the reflux channel and the liquid storage part.

3. The liquid guiding device according to claim 2, characterized in that: The sealing element is any one of a sealing ball, a sealing strip, a sealing block and a sealing column.

4. The liquid guiding device according to claim 1, characterized in that: The liquid outlet channel includes an internal section extending into the external liquid storage device and an extension section located on the flow guiding structure. The internal section and the extension section are connected to each other and are in an integrally formed shape or a split connection structure.

5. The liquid guiding device according to claim 1, characterized in that: The pipeline is a three-way pipeline, one end of which is conductively connected to the air pump, one end of which is conductively connected to the switch element, and the other end of which is conductively connected to the external liquid storage device.

6. The liquid guiding device according to claim 1, characterized in that: The switch element is any one of a solenoid valve, a pneumatic valve, a mechanical valve, and a hydraulic valve.

7. The liquid guiding device according to any one of claims 1 to 6, characterized in that: A limiting structure is arranged at one end of the reflux channel facing the external liquid containing device, and the limiting structure is provided with a plurality of vent holes.

8. An aromatherapy machine, comprising a main body housing, characterized in that: The main housing is provided with a liquid guide device as described in any one of claims 1-7, the liquid outlet channel is connected to an atomization channel, an atomization structure is provided below the atomization channel away from one end of the liquid outlet channel, and an atomization module for atomizing liquid on the atomization structure is provided in the main housing.

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