Liquid guiding device and aromatherapy machine

Abstract

The utility model discloses a liquid flow guide device and an aromatherapy machine, and the liquid flow guide device comprises an air pump, a pipeline, a switch element and a flow guide structure. According to the utility model, the liquid conveying and recycling efficiency is improved, the conveying and recycling operation is convenient and fast, and the flexibility is higher; the aromatherapy machine adopting the structure has the advantages of liquid diversion, accurate backflow, air pressure adjustment, automatic control and the like, the atomization effect and aromatherapy durability of the aromatherapy machine are improved, and more stable and convenient use experience is provided through efficient liquid flowing and an intelligent control system.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid guide sealing technical field, especially relate to a liquid guide device and aromatherapy machine. BACKGROUND

[0002] Liquid guide devices have a wide range of applications in industrial, household equipment and automation systems, particularly in liquid delivery, storage, and reflux control. With the advancement of technology and increasing demand for automation, the performance and precision requirements of liquid guide devices have gradually increased, especially in fields that require high efficiency, intelligence, and precision, such as aromatherapy machines, liquid filling systems, chemical processing, and pharmaceutical industries.

[0003] Traditional liquid guide systems typically use manual valves, mechanical pumps, or other mechanical control elements to control liquid flow, resulting in low control precision and potential overflows or underflows, which can affect system efficiency.

[0004] Additionally, some aromatherapy liquids contain corrosive components and are oily. If manual valves, mechanical pumps, or peristaltic pumps are used to control the flow of these liquids, oil will accumulate on the valves or pump bodies over time, and the corrosive components will corrode the valves or pump bodies, affecting their service life and the aroma output of the aromatherapy machine. SUMMARY

[0005] The main purpose of the utility model is to provide a liquid guide device that improves the efficiency of liquid delivery and recovery, making the operation more convenient and flexible.

[0006] To achieve the above purpose, the utility model provides the following technical solutions.

[0007] In a first aspect, the utility model provides a liquid guide device for guiding the liquid in an external liquid container. The device includes an air pump, a pipeline, a switching element, and a guide structure. The air pump is connected to the external liquid container through the pipeline.

[0008] The switching element is connected to the pipeline and controls the sealing and opening between the air pump and the external liquid container.

[0009] The guide structure is used to connect to the external liquid container. The guide structure includes a liquid outlet channel for connecting to the external liquid container, a liquid storage part for storing the liquid after it flows out of the external liquid container, and a reflux channel for connecting the liquid storage part and the external liquid container. The reflux channel is provided with a sealing element.

[0010] The sealing member realizes liquid flowing from the liquid storage part into the external liquid containing device through the backflow channel or sealing the backflow channel to prevent gas flowing out of the backflow channel through the change of the air pressure in the external liquid containing device.

[0011] The backflow channel comprises a limiting section and a backflow section, when the sealing member is located in the backflow section, liquid can flow from the liquid storage part into the external liquid containing device through the backflow channel, and when the sealing member is located at the transition position of the limiting section and the backflow section, the backflow channel is sealed and isolated from the liquid storage part.

[0012] In a possible implementation, 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 comprises an embedded section extending into the external liquid containing device and an extension section located on the liquid guiding structure, the embedded section and the extension section are in communication and in an integrated or separate connection structure.

[0014] In a possible implementation, the pipeline is a three-way pipeline, one end of the three-way pipeline is in communication with the air pump, one end is in communication with the switch element, and the other end is in communication with the external liquid containing device.

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

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

[0017] The technical scheme of the utility model realizes the free up-down circulation of liquid between the liquid containing device and the liquid storage part through the air pump regularly adjusting the air pressure in the external liquid containing device according to the need, and the sealing member ensures the airtightness in the whole process to prevent gas leakage or liquid backflow.

[0018] Meanwhile, the liquid guiding mode through the control of the air pressure in the liquid containing device can guide some liquid containing easily-corroded substances and oily liquid, and the liquid cannot cause oil hanging and corrosion on the liquid guiding structure, thereby ensuring the stability, reliability and long service life of the liquid guiding.

[0019] The utility model discloses a purpose two, in order to provide a kind of aromatherapy machine, to ensure that fragrance liquid can be stably and evenly atomized output, prevent fragrance liquid volatilization and external air into, to affect the aroma release effect of equipment.

[0020] To achieve the above object, the second aspect, the utility model provides a kind of aromatherapy machine, including host computer shell, the host computer shell is provided with as described in any possible implementation mode Liquid flow guide device, the liquid outlet passageway is connected with atomization channel, and the lower of the atomization channel far from the liquid outlet passageway one end is equipped with atomization structure, and host computer shell is equipped with the atomization module that atomizes the liquid on atomization structure.

[0021] The utility model technical scheme is designed by the combination of aromatherapy machine and liquid flow guide device, has multiple advantages such as liquid flow guide, accurate backflow, air pressure regulation and automation control.The design not only improves the atomization effect and aromatherapy durability of aromatherapy machine, but also provides more stable and convenient use experience through efficient liquid flow and intelligent control system. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in these drawings without creative labor.

[0023] Figure 1 It is the internal structure schematic view of the embodiment of the utility model liquid flow guide device;

[0024] Figure 2 It is the sectional view of the embodiment of the utility model liquid containing device;

[0025] Figure 3 It is the overall structure schematic view of the embodiment of the utility model liquid flow guide device;

[0026] Figure 4 It is the structure schematic view of the embodiment of the utility model aromatherapy machine;

[0027] Figure 5 It is the sectional view of the embodiment of the utility model aromatherapy machine.

[0028] EXPLANATION OF DRAWINGS:

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

[0030] The realization, functional features and advantages of the utility model will be further explained in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0032] Embodiment one

[0033] In combination with reference Figures 1 to 3 As shown in the figure, Figure 1 is an internal structure schematic view of an embodiment of the liquid flow guide device of the utility model, Figure 2 is a sectional view of an embodiment of the liquid containing device of the utility model, Figure 3 is an overall structure schematic view of an embodiment of the liquid flow guide device of the utility model, it is to be explained that the overall structure schematic view here is a structure schematic view of the liquid flow guide device 100 after installation, wherein the air pump 50, the pipeline 30, the switch element 40 and the flow guide structure 20 are all installed inside the shell. The utility model provides a kind of liquid flow guide device 100 for guiding the liquid in liquid device 10, including air pump 50, pipeline 30, switch element 40 and flow guide structure 20, the air pump 50 is connected with liquid device 10 by pipeline 30;The switch element 40 is connected to pipeline 30 and controls the sealing and opening between air pump 50 and liquid device 10;The flow guide structure 20 is used to be connected with liquid device 10, the flow guide structure 20 includes the liquid outlet channel 21 for being connected with liquid device 10, the liquid storage part 22 after liquid flow out of liquid device 10, the backflow channel 23 connecting liquid storage part 22 and liquid device 10, sealing member 231 is arranged in backflow channel 23;The sealing member 231 realizes that liquid flows into liquid device 10 from liquid storage part 22 by backflow channel 23, or seals backflow channel 23 to prevent gas from flowing out of backflow channel 23 by the change of gas pressure in liquid device 10.

[0034] In combination with reference Figure 1 And Figure 2As shown, the liquid flow guide device 100 is mainly used to control the flow of fluid between the liquid forming device 10 and the liquid storage part 22, and to achieve the circulation of the fluid by controlling the floating or falling of the sealing member 231. The liquid forming device 10 stores the liquid to be transported, the flow guide structure 20 connects the liquid forming device 10 and the liquid storage part 22, and the flow guide structure 20 includes a liquid outlet channel 21 and a circulation channel 23. One end of the flow guide 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 circulation channel 23 connects the liquid storage part 22 and the external liquid forming device 10, and the sealing member 231 is arranged in the circulation channel 23. By injecting gas into the external liquid forming device 10 through the gas pump 50, the gas pressure inside the external liquid forming device 10 is increased, and when the gas pressure exceeds the fluid pressure of the liquid, the liquid is pushed to flow to the liquid storage device through the flow guide pipe. In order to ensure that the liquid can flow back to the external liquid forming device 10, the circulation channel 23 is designed in this embodiment, and the sealing member 231 is arranged in the circulation channel. The sealing member 231 can be spherical. The function of the sealing member 231 is to control the gas pressure and the liquid pressure, and to float or fall, so as to close or open the circulation channel 23, and to prevent or allow the liquid to flow back from the liquid storage part 22 to the external liquid forming device 10. The circulation channel 23 is also provided with a gas release hole for releasing excess gas pressure, so that the sealing ball can accurately control the circulation process when the pressure changes.

[0035] In one possible implementation, the circulation channel 23 includes a limiting section 232 and a circulation section 233. When the sealing member 231 is located in the circulation section 233, the liquid can flow from the liquid storage part 22 to the liquid forming device 10 through the circulation channel 23. When the sealing member 231 is located at the transition position of the limiting section 232 and the circulation section 233, the circulation channel 23 is sealed and isolated from the liquid storage part 22.

[0036] In combination with reference Figure 2As shown, in the present embodiment, the return channel 23 is designed in combination of the limiting section 232 and the return section 233. The sealing member 231 is arranged in the return channel 23, when the system is in a balanced state, the sealing member 231 falls to the position of the return section 233 due to its weight, and the excess liquid in the liquid storage portion 22 can flow into the external liquid forming device 10 through the return channel 23. However, when the air pump 50 inflates the external liquid forming device 10, the increase of air pressure will gradually lift the sealing member 231, forming a floating mechanism for controlling the sealing, and as the pressure continues to increase, the sealing member 231 floats from the return section 233 to the limiting section 232, blocking the return channel 23 and preventing the liquid from flowing to the liquid storage device. The return section 233 is provided with a plurality of air vents, which allow air to flow freely when the air pressure changes, helping to maintain the pressure balance of the system and ensuring that the sealing member 231 can be opened and closed flexibly according to the changes of air pressure and liquid pressure. The air vents are also provided to quickly release excess air pressure during the liquid return process, avoiding the influence of excessive air pressure on the normal return of the liquid. This design ensures that the liquid can smoothly return from the liquid storage device to the external liquid forming device 10 after the pressure drops.

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

[0038] In the present embodiment, the sealing member 231 can be spherical, strip-shaped, block-shaped, or cylindrical.

[0039] In a possible implementation, the liquid outlet channel 21 includes an inbuilt section 211 extending into the liquid forming device 10 and an extension section 212 arranged on the flow guide structure 20, the inbuilt section 211 and the extension section 212 are in communication and in one-piece or separate connection structure.

[0040] In the present embodiment, the liquid outlet channel 21 can be arranged in one-piece or in separate parts, the inbuilt section 211 extending into the liquid forming device 10 can be inserted into the extension section 212 or formed in one-piece with the extension section 212, the inbuilt section 211 is inserted into the liquid forming device 10 to guide the liquid into the liquid storage portion 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 in communication with the air pump 50, one end is in communication with the switch element 40, and the other end is in communication with the liquid forming device 10.

[0042] In this embodiment, the pipeline 30 adopts a three-way pipeline 30 structure, which has three pipeline 30 connection ports. The first end of the three-way pipeline 30 is in conductive connection with the output end of the air pump 50, ensuring that the airflow provided by the air pump 50 can enter the pipeline 30 system through this port; the second end is connected with the switch element 40, which is used to control the flow of fluid and can open and close the fluid channel as needed, thereby adjusting the delivery and backflow of the fluid; the third end is in conductive connection with the external liquid containing device 10 outside, allowing the fluid (such as liquid or gas) to be transmitted from the liquid containing 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, when the air pump 50 is running, it can push the fluid through the control of the switch element 40 to realize the automatic transmission or adjustment of the fluid in the external liquid containing device 10.

[0043] In one possible implementation, the switch element 40 is any one of an electromagnetic valve, a pneumatic valve, a mechanical valve, or 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 one of the following:

[0045] Electromagnetic valve: An electromagnetic valve uses the action of an electromagnet to control the opening and closing of the valve core and is widely used in situations that require precise control of fluid flow and direction. The electromagnetic valve has fast response speed and is suitable for use in automatic control systems, and can complete the opening or closing operation in a short time.

[0046] Pneumatic valve: A pneumatic valve drives the opening and closing of the valve through air pressure and is suitable for use in high-flow or high-pressure environments. The pneumatic valve has the characteristics of simple operation and high reliability and is commonly used in industrial automation systems, especially in hydraulic or pneumatic control systems.

[0047] Mechanical valve: A mechanical valve controls the opening and closing of the fluid channel through mechanical means (such as manual or mechanical devices). This type of valve usually does not require an external power source and is suitable for use in some environments that have low requirements for electricity or gas, such as manual control or remote mechanical operation.

[0048] Hydraulic valve: A hydraulic valve uses liquid pressure to drive the opening and closing of the valve and is commonly used in liquid transmission systems. It can provide high-precision flow control and is suitable for use in scenarios that require precise adjustment of liquid flow.

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

[0050] In this embodiment, the plurality of vent holes on the limiting structure 234 can provide a flow channel for gas, helping to balance the pressure difference between liquid and gas, effectively avoiding pressure accumulation caused by excessive sealing or blocked backflow, and ensuring the smoothness of the backflow channel and the stability of liquid flow. The presence of vent holes can form a certain air flow channel between the backflow channel and the external liquid container 10, so that the air pressure change can be smoothly transmitted to the seal of the backflow channel. This makes the sealing and opening control of the backflow channel more precise, and by carefully adjusting the size and number of vent holes, the sealing performance and control effect of liquid backflow can be further optimized. The design of the limiting structure 234 and the vent holes limits the speed and direction of liquid backflow in the backflow channel. By providing multiple vent holes, the balance between air flow and liquid flow during liquid backflow can be ensured, avoiding uneven or excessive backflow of liquid during backflow. This helps to maintain the stability of liquid flow and the working efficiency of the aromatherapy machine.

[0051] In summary, the working principle and process of the liquid flow guide device 100 in Example One are as follows:

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

[0053] Flow guide operation:

[0054] When the flow guide is needed, the switch element 40 (such as an electromagnetic valve or a pneumatic valve) is opened, so that the air pump 50 can establish a connection between the pipeline 30 and the external liquid container 10, and the air pump 50 starts to work.

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

[0056] Backflow control:

[0057] When the liquid flows out of the external liquid container 10, the liquid enters the liquid storage part 22 in the flow guide structure 20 and flows back to the external liquid container 10 through the backflow channel 23.

[0058] The backflow channel 23 is provided with a seal 231 (such as a sealing ball, a sealing strip, a sealing block or a sealing column). According to the change of the air pressure in the external liquid container 10, the seal 231 adjusts the position to control whether the liquid can flow back to the external liquid container 10:

[0059] When the seal 231 is located in the backflow section 233, the liquid can flow into the external liquid container 10 through the backflow channel 23.

[0060] When the sealing member 231 is located at the transition position of the limiting section 232 and the backflow section 233, the backflow channel 23 is sealed from the liquid storage part 22, preventing liquid from flowing into the external liquid container 10.

[0061] Sealing control:

[0062] Through the operation of the air pump 50, the change of the air pressure in the external liquid container 10, and the action of the sealing member 231, the sealing or opening of the backflow channel 23 can be achieved, thereby controlling the flow of liquid.

[0063] The movement of the sealing member 231 can be precisely controlled by air pressure changes or other external signals, ensuring the stability and accuracy of liquid flow.

[0064] Switching between backflow and flow:

[0065] According to the needs, the liquid can flow back or flow between the liquid storage part 22 and the external liquid container 10. By controlling the working state of the air pump 50 through the switch element 40, the smooth flow and backflow process of the liquid is ensured.

[0066] Example two

[0067] Combined with reference Figure 4 and Figure 5 As shown in the figure, the utility model also proposes a kind of aromatherapy machine 200, the aromatherapy machine 200 includes host housing 201 and liquid flow guide device 100, the specific structure of the liquid flow guide device 100 refers to the above embodiment, since the aromatherapy machine 200 adopts all technical solutions of the above all embodiments, at least has all beneficial effects brought by the technical solutions of the above embodiment, here will not be repeated one by one.Drainage passage 21 is connected with atomization channel, and atomization structure 202 is arranged below the end of atomization channel away from drainage passage 21, and atomization module for atomizing liquid on atomization structure 202 is arranged in host housing 201.

[0068] Combined with reference Figure 5 As shown in the figure, the aromatherapy machine 200 usually needs to guide fragrance liquid from the liquid storage device and atomize, to achieve the purpose of air purification or aromatherapy. Through the liquid flow guide device 100 in the utility model, the fragrance liquid can realize automatic flow and circulation between the external liquid device 10 and the liquid storage device. For example, in the practical application of the aromatherapy machine 200, the fragrance liquid can be automatically delivered to the atomizer through the above flow guide device, avoiding the trouble of frequent manual liquid addition of the user. Moreover, the design of the backflow channel 23 ensures that when the fragrance liquid in the liquid storage device is used up or the air pressure decreases, the remaining fragrance liquid can automatically flow back to the external liquid device 10, thereby reducing liquid waste.

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

[0070] Function of the liquid flow guide device 100:

[0071] Activation of the air pump 50: The air pump 50 in the aromatherapy machine 200 is connected to the external liquid container 10 (usually a fragrance liquid container) through the pipeline 30. When the air pump 50 is started, it provides power for the liquid flow guide.

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

[0073] Liquid flow guide and liquid storage management:

[0074] Liquid outlet and storage function: The liquid first flows into the liquid storage part 22 through the liquid outlet channel 21. When the liquid leaves the external liquid container 10, the liquid storage part 22 is used to temporarily store the liquid and is connected to the external liquid container 10 through the backflow channel 23.

[0075] Backflow control: The backflow channel 23 is provided with a sealing element 231 (such as a sealing ball, a sealing strip, etc.). The position of the sealing element 231 is controlled by the change of air pressure in the external liquid container 10. When the air pressure changes, the sealing element 231 can move to realize the backflow 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 flow guide 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 ultrasonic waves, heating or other methods.

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

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

[0080] Function of the sealing element 231: The sealing of the liquid flow and backflow channels 23 is controlled by the change of air pressure in the external liquid container 10, ensuring the sealing of the liquid flow guide system and the smoothness of the liquid transmission. The change of the position of the sealing element 231 determines whether the liquid is guided out or backflows to the liquid container.

[0081] The liquid flow guide device 100 can also be applied to other occasions requiring 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 actual application, sensors can be added to monitor the flow, air pressure and liquid level of the liquid, and connect these data with an intelligent control system to achieve full-automatic control of the liquid delivery process. This extension not only improves the working efficiency of the system, but also greatly reduces manual intervention and maintenance costs.

[0082] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0083] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A liquid flow directing device for directing the flow of liquid in an external liquid containing device, characterised in that: The liquid guiding device comprises a gas pump, a pipeline, a switch element and a flow guiding structure, the gas pump is connected with an external liquid container through the pipeline; The switch element is connected with the pipeline and controls the sealing and opening between the gas pump and the external liquid container; The flow guiding structure is used to connect with the external liquid container, the flow guiding structure comprises a liquid outlet channel for connecting with the external liquid container, a liquid storage part for storing the liquid after the liquid flows out of the external liquid container, and a backflow channel for connecting the liquid storage part and the external liquid container, and a sealing element is arranged in the backflow channel; The sealing element realizes the liquid flowing from the liquid storage part into the external liquid container through the backflow channel or sealing the backflow channel to prevent the gas flowing out of the backflow channel through the change of the air pressure in the external liquid container; The backflow channel comprises a limiting section and a backflow section, when the sealing element is located in the backflow section, the liquid can flow from the liquid storage part into the external liquid container through the backflow channel, and when the sealing element is located at the transition part between the limiting section and the backflow section, the backflow channel and the liquid storage part are sealed and isolated.

2. The liquid directing device of claim 1, wherein: The sealing element is any one of a sealing ball, a sealing strip, a sealing block and a sealing column.

3. The liquid directing device of claim 1, wherein: The liquid outlet channel comprises an inner built-in section extending into the external liquid container and an extension section on the flow guiding structure, the inner built-in section and the extension section are in communication and are in an integrated form or a split connection structure.

4. The liquid directing device of claim 1, wherein: The pipeline is a three-way pipeline, one end of the three-way pipeline is connected with the gas pump, one end is connected with the switch element, and the other end is connected with the external liquid container.

5. The liquid directing device of claim 1, wherein: The switch element is any one of an electromagnetic valve, a pneumatic valve, a mechanical valve and a hydraulic valve.

6. The liquid flow directing device of any one of claims 1 to 5, wherein: The backflow channel is provided with a limiting structure at one end facing the external liquid container, and the limiting structure is provided with a plurality of air holes.

7. An aromatherapy machine comprising a main housing characterised in that: The main machine shell is provided with the liquid guiding device as claimed in any one of claims 1-6, the liquid outlet channel is connected with an atomization channel, an atomization structure is arranged below the end of the atomization channel away from the liquid outlet channel, and an atomization module for atomizing the liquid on the atomization structure is arranged in the main machine shell.

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