Fragrance diffusion equipment

Abstract

The invention provides fragrance diffusion equipment which comprises an atomizing head, an atomizing core and a liquid storage bottle, the atomizing core and the liquid storage bottle are both connected with the atomizing head, the atomizing head is provided with a leakage-proof ventilation piece, the leakage-proof ventilation piece is provided with a movable cavity and a locking ball capable of rolling in the movable cavity, and the locking ball is arranged in the movable cavity. The leakage-proof ventilation piece is further provided with a liquid return channel communicated with the movable cavity and a ventilation hole, and the hole diameter of the liquid return channel ranges from 0.5 mm to 2 mm. When the fragrance diffusion equipment is in a first state, the end, facing the movable cavity, of the liquid return channel is not blocked by the locking ball so that the liquid return channel can be communicated with the vent hole, and when the fragrance diffusion equipment is in a second state, the locking ball blocks the end, facing the movable cavity, of the liquid return channel so that the liquid return channel can be communicated with the vent hole. And the liquid return channel is not communicated with the vent hole. Compared with the prior art, the fragrance diffusion equipment not only ensures the leakproof effect, but also ensures that the use cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fragrance atomization equipment, in particular to an aroma diffusion device. BACKGROUND

[0002] With the evolution of technology and the improvement of economic environment, people have various demands for the quality of living space. In order to improve the surrounding odor or change the atmosphere and mood, various fragrance products with air fragrance function have appeared in the consumer market.

[0003] When the user uses the aroma diffusion device, if it collides with the aroma diffusion device, it is easy to make the aroma diffusion device fall down, which will cause a large amount of aromatherapy essential oil to leak out. In order to solve this problem, the aroma diffusion instrument with the application number 202322987899.8 adopts a ball and spring structure, but the leakage prevention scheme of the application scheme has certain defects, such as the fatigue failure of the spring, which easily increases the use cost.

[0004] Therefore, based on the above problems, it is necessary to effectively improve the existing aroma diffusion device. SUMMARY

[0005] In view of the problems existing in the prior art, the present application provides an aroma diffusion device, which not only ensures the leakage prevention effect, but also reduces the use cost.

[0006] In order to solve the above technical problems, the technical scheme of the present application is:

[0007] An aroma diffusion device, comprising an atomization head, an atomization core and a liquid storage bottle, the atomization core and the liquid storage bottle are connected with the atomization head, the atomization core is connected with a liquid suction pipe extending into the liquid storage bottle, the atomization head is used for supplying gas to the atomization core, the atomization core is used for atomizing the liquid in the liquid storage bottle, the liquid of the atomization head passes through the atomization cavity of the atomization head and is discharged from the mist outlet of the atomization head, the atomization head is sealingly connected with the liquid storage bottle, the atomization head is provided with a leakage prevention and ventilation member, the leakage prevention and ventilation member extends into the liquid storage bottle, the leakage prevention and ventilation member is provided with a movable chamber and a locking ball which can roll in the movable chamber, the leakage prevention and ventilation member is also provided with a liquid return channel communicating with the movable chamber and a ventilation hole, the liquid return channel is located between the atomization cavity and the movable chamber, the ventilation hole is located between the movable chamber and the internal space of the liquid storage bottle, the pore diameter of the liquid return channel is 0.5mm-2mm, and the diameter of the locking ball is more than twice the pore diameter of the liquid return channel.

[0008] When the fragrance diffusing device is in the first state, the liquid return channel is not blocked by the locking ball at one end thereof facing the movable chamber, and the liquid return channel is communicated with the air hole; when the fragrance diffusing device is in the second state, the locking ball blocks the one end of the liquid return channel, and the liquid return channel is not communicated with the air hole.

[0009] Preferably, the upper end of the movable chamber is open, and the leakage-proof air passage further comprises a sealing member detachably sealing the upper end of the movable chamber, and the liquid return channel is formed in the sealing member.

[0010] Preferably, the bottom of the liquid return channel is provided with an arc-shaped structure concaved inward, and when the fragrance diffusing device is in the second state, the locking ball rolls into the arc-shaped structure to block the liquid return channel, and the aperture of the liquid return channel is 0.8-1.6 mm.

[0011] Preferably, the bottom end of the leakage-proof air passage is provided with a liquid return hole communicated with the movable chamber, and the liquid return hole is located between the movable chamber and the internal space of the liquid storage bottle.

[0012] Preferably, the atomizing head comprises an atomizing head body, a liquid storage bottle connecting portion and a leakage-proof cover, the liquid storage bottle connecting portion and the leakage-proof cover are connected to the bottom end of the atomizing head body, the liquid storage bottle connecting portion is annular, the leakage-proof cover is located on the inner side of the liquid storage bottle connecting portion and is spaced apart from the liquid storage bottle connecting portion by a preset distance, the bottle mouth of the liquid storage bottle is connected to the liquid storage bottle connecting portion and is located between the leakage-proof cover and the liquid storage bottle connecting portion, the leakage-proof cover is inserted into the bottle mouth of the liquid storage bottle and is sealingly connected to the bottle mouth of the liquid storage bottle, the liquid suction pipe passes through the leakage-proof cover and extends into the liquid storage bottle, and the leakage-proof air passage is arranged on the leakage-proof cover and is adjacent to the liquid suction pipe.

[0013] Preferably, the bottom end of the atomizing head body is further provided with a third fixing member, and the leakage-proof cover is connected to the third fixing member by a screw passing through the leakage-proof cover.

[0014] Preferably, the atomizing cavity is provided with an oil storage structure, the oil storage structure has an oil storage shell, the upper end of the oil storage shell forms the mist outlet, the lower end of the oil storage shell is provided with a mist inlet, in the transverse direction, the mist inlet and the mist outlet are arranged in a staggered manner, and the aerosol formed by the atomizing core enters the oil storage structure from the mist inlet and is discharged out of the atomizing head from the mist outlet.

[0015] As preferred, a cylindrical mounting portion is formed in the atomizing head body, the oil storage structure is inserted into the mounting portion, the oil storage shell comprises an upper shell and a lower shell, the upper shell is formed with the mist outlet, the mist outlet is formed with a protruding step portion downward, an oil storage space is formed between the inner wall of the upper shell and the step portion, and the lower shell is formed with the mist inlet.

[0016] As preferred, an atomizing seat is further included, the atomizing core is fixed on the atomizing seat, the atomizing seat is arranged in the leakage-proof cover, and the liquid suction pipe is connected with the atomizing seat through the leakage-proof cover.

[0017] The liquid suction pipe is inserted into the atomizing seat and connected with the inside of the atomizing seat, the liquid in the liquid storage bottle enters the atomizing seat through the liquid suction pipe, and is atomized by the atomizing core.

[0018] As preferred, a fourth fixing member is arranged in the leakage-proof cover, the atomizing seat is embedded in the fourth fixing member, so that the atomizing seat is fixed in the leakage-proof cover, the atomizing seat is arranged with a connecting column, a gas guiding column and a liquid suction column, the connecting column is connected with the gas guiding column, the atomizing core is fixed on the gas guiding column and the liquid suction column, and the connecting column is connected with the air inlet pipeline in the atomizing head.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The structure not only ensures the leakage-proof effect, but also reduces the use cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which preferred embodiments of the present application are shown by way of illustrative example. Like reference numerals in the drawings denote like elements, and the drawings are not necessarily drawn to scale, emphasis instead being placed upon illustrating the principles of the present application.

[0022] Figure 1 is a perspective view of an expansion device according to the present application.

[0023] Figure 2 is a sectional view of an expansion device according to the present application.

[0024] Figure 3 is a structural schematic view of an atomizing head according to the present application.

[0025] Figure 4 is a structural schematic view of a leakage-proof cover according to the present application.

[0026] Figure 5 is a structural schematic view of a sealing member according to the present application.

[0027] Figure 6 is the structure diagram of the atomizing head main body in the present application.

[0028] Figure 7 is the structure diagram of the oil storage structure in the present application.

[0029] Figure 8 is the internal structure diagram of the oil storage structure in the present application.

[0030] Figure 9 is the structure diagram of the connection between the atomizing seat and the atomizing core in the present application.

[0031] Figure 10 is the structure diagram of the atomizing seat in different directions in the present application.

[0032] Figure 11 is the sectional view of the atomizing seat and the leakage-proof cover in the present application.

[0033] In the figure: atomizing head 1; atomizing head main body 11; first fixing member 111; third fixing member 112; mounting portion 113; liquid storage bottle connecting portion 114; leakage-proof cover 12; screw 13; second fixing member 121; fourth fixing member 122; atomizing cavity 14; air inlet hole 15; mist outlet 16; leakage-proof air passage member 2; air passage hole 21; liquid return hole 22; movable cavity 23; sealing member 3; liquid return passage 4; arc-shaped structure 41; locking ball 5; atomizing seat 6; air guide column 61; connecting column 62; liquid suction column 63; oil storage structure 7; mist inlet 71; oil storage shell 72; upper shell 721; lower shell 722; step portion 73; oil storage space 74; liquid storage bottle 8; atomizing core 9; liquid suction pipe 10. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings.

[0035] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element and integrated as a whole, or there can be a middle element. The terms "mounting", "one end", "the other end" and similar expressions used herein are only for illustrative purposes.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this technology belongs. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0037] The following will be described in detail below in combination with the drawings Figures 1-11 The present application will be further described in detail.

[0038] like Figures 1-5 As shown, a diffuser includes an atomizing head 1, an atomizing core 9, and a liquid storage bottle 8. Both the atomizing core 9 and the liquid storage bottle 8 are connected to the atomizing head 1, with the atomizing head 1 and the liquid storage bottle 8 sealed together. The atomizing core 9 is connected to a suction tube 10 that extends into the liquid storage bottle 8. The atomizing head 1 supplies gas to the atomizing core 9, and the atomizing core 9 atomizes the liquid in the liquid storage bottle 8. The atomized liquid passes through the atomizing chamber 14 of the atomizing head 1 and is discharged from the outlet 16 of the atomizing head 1.

[0039] The atomizing head 1 is equipped with a leak-proof vent 2, which extends into the liquid storage bottle 8. The leak-proof vent 2 has a movable chamber 23 and a locking ball 5 that can roll within the movable chamber 23. The leak-proof vent 2 also has a return liquid channel 4 and a vent hole 21 communicating with the movable chamber 23. The return liquid channel 4 is located between the atomizing chamber 14 and the movable chamber 23, and the vent hole 21 is located between the movable chamber 23 and the interior of the liquid storage bottle 8. The return liquid channel 4 not only returns liquid but also balances the air pressure. When the diffuser is working normally, as the liquid in the liquid storage bottle 8 is continuously atomized, air enters the atomizing head 1 from the outlet 16 and then enters the liquid storage bottle 8 through the return liquid channel 4 and the vent hole 21, maintaining the air pressure balance within the liquid storage bottle 8. Furthermore, the atomized liquid easily condenses into droplets upon contact with the inner wall of the atomizing chamber 14, and these droplets can flow back to the movable chamber 23 through the return liquid channel 4.

[0040] In this application, the aperture of the return channel 4 is 0.5mm-2mm. The aroma diffuser of this application is typically used to atomize essential oils with a certain viscosity. When the diffuser is tilted, because the atomizing head 1 is sealed to the storage bottle 8, air from outside the storage bottle 8 has no other path to enter it. Therefore, the essential oil in the storage bottle 8 is unlikely to leak into the atomizing chamber 14 through the small aperture of the return channel 4. When the aperture is greater than 2mm, especially greater than 3mm, the return channel 4 can simultaneously allow air to enter and leak oil, resulting in poor leak prevention. When the aperture of the return channel 4 is less than 0.5mm, due to the small aperture and the viscosity of the essential oil, the essential oil flowing back from the atomizing chamber 14 will accumulate in the return channel 4, preventing air from entering the storage bottle 8 through the return channel 4. This will affect the air pressure balance of the storage bottle 8 during normal operation of the diffuser, preventing the essential oil in the storage bottle 8 from being drawn into the atomizing core 9 by the suction tube 10. The diameter of the locking ball 5 is more than twice the diameter of the return channel 4, which can further seal the return channel 4 and prevent essential oil leakage. It should be noted that when the diameter of the return channel 4 is not uniform, the diameter of the return channel 4 referred to here as 0.5mm-2mm refers to its minimum diameter of 0.5mm-2mm.

[0041] When the fragrance diffusing device is in the first state, the one end of the liquid return channel 4 towards the movable chamber 23 is not blocked by the locking ball 5, so that the liquid return channel 4 is communicated with the air hole 21, and when the fragrance diffusing device is in the second state, the one end of the liquid return channel 4 towards the movable chamber 23 is blocked by the locking ball 5, so that the liquid return channel 4 is not communicated with the air hole 21. In the present application, the first state can be understood as the fragrance diffusing device being in the right state, and the second state can be understood as the fragrance diffusing device being in the 180° tilting state. In the second state, the locking ball 5 is affected by gravity and slides to block the liquid return channel 4, effectively preventing liquid leakage and further improving the anti-leakage effect. Moreover, due to the effect of gravity, the locking ball 5 can block the liquid return channel 4 without reducing the spring and other components, which not only simplifies the structure, but also avoids the easy damage of the spring and reduces the use cost. Of course, the fragrance diffusing device of the present application has more than two states, and the fragrance diffusing device can also be in the 90° tilting state and other states, which will not be described in detail here. When the fragrance diffusing device is in the 90° tilting state, the locking ball 5 has not completely blocked the liquid return channel 4, and at this time, due to the pore size of 0.5mm-2mm, the air pressure in the liquid storage bottle 8 does not change, so that the liquid in the liquid storage bottle 8 cannot overflow in the liquid return channel 4.

[0042] The upper end of the movable chamber 23 is open, and the anti-leakage air device 2 further comprises a sealing member 3 which detachably seals the upper end of the movable chamber 23, facilitating the installation and removal of the locking ball 5. In the present application, the liquid return channel 4 is provided on the sealing member 3, specifically at the bottom of the sealing member 3.

[0043] As shown in Figure 2 and Figure 5 , the bottom of the liquid return channel 4 is provided with an inner concave arc structure 41 which is matched with the shape of the locking ball 5. When the fragrance diffusing device is in the second state, the locking ball 5 is rolled into the arc structure 41 under the action of gravity to block the liquid return channel 4. The pore size of the liquid return channel 4 is 0.8-1.6mm, and the embodiment is selected to be 1.5mm.

[0044] As shown in Figure 2 , since the liquid will flow into the movable chamber 23 in the tilting state, the liquid flowing back from the atomizing chamber 14 will also flow into the movable chamber 23 through the liquid return channel 4. If the liquid in the movable chamber 23 is not removed in time, the locking ball 5 will be stuck at the bottom of the movable chamber 23 when the liquid stays for a long time, which will affect the rolling and blocking of the locking ball 5. Therefore, in the preferred embodiment of the present application, a liquid return hole 22 which communicates with the movable chamber 23 is provided at the bottom of the anti-leakage air device 2, which can effectively prevent the liquid from staying in the movable chamber 23 for a long time and ensure the subsequent blocking effect of the locking ball 5. The liquid return hole 22 is located between the movable chamber 23 and the inner space of the liquid storage bottle 8, and the liquid in the movable chamber 23 can return to the liquid storage bottle 8 through the liquid return hole 22.

[0045] As shown in Figures 2-3 , the atomizing head 1 comprises an atomizing head body 11, a liquid storage bottle connecting part 114 and a leakage-proof cover 12, the liquid storage bottle connecting part 114 and the leakage-proof cover 12 are both connected to the bottom end of the atomizing head body 11, the liquid storage bottle connecting part 114 is in the shape of a ring to match the bottle mouth of the liquid storage bottle 8, the inner wall of the liquid storage bottle connecting part 114 and the outer wall of the top of the liquid storage bottle 8 are both formed with matching threads, the liquid storage bottle 8 and the atomizing head body 11 are connected through a threaded connection, and when the liquid in the liquid storage bottle 8 is consumed, the user can replace the liquid storage bottle 8.

[0046] The leakage-proof cover 12 is located inside the liquid storage bottle connecting part 114 and is spaced apart from the liquid storage bottle connecting part 114 by a predetermined distance, the bottle mouth of the liquid storage bottle 8 is connected to the liquid storage bottle connecting part 114 and is located between the leakage-proof cover 12 and the liquid storage bottle connecting part 114, the leakage-proof cover 12 is inserted into the bottle mouth of the liquid storage bottle 8 and is in sealing cooperation with the bottle mouth of the liquid storage bottle 8, the liquid suction pipe 10 passes through the leakage-proof cover 12 and extends into the liquid storage bottle 8, and the leakage-proof air passage 2 is arranged on the leakage-proof cover 12 and is adjacent to the liquid suction pipe 10. Due to the sealing cooperation between the leakage-proof cover 12 and the bottle mouth of the liquid storage bottle 8, the liquid in the liquid storage bottle 8 can only flow out through the liquid suction pipe 10 or the leakage-proof air passage 2, thereby reducing the chance of leakage.

[0047] As shown in Figure 4 and Figure 6 , the bottom of the atomizing head body 11 is provided with a first fixing part 111, and the leakage-proof cover 12 is provided with a second fixing part 121, the head of the sealing part 3 can be first embedded into the first fixing part 111, and then the tail of the sealing part 3 can be embedded into the second fixing part 121, or the tail of the sealing part 3 can be first embedded into the second fixing part 121, and then the head of the sealing part 3 can be embedded into the first fixing part 111, so as to realize the fixed installation of the sealing part 3, and the installation sequence is operated according to the use habit, which will not be described in detail here.

[0048] The bottom end of the atomizing head body 11 is further provided with a third fixing part 112, and the leakage-proof cover 12 is connected to the third fixing part 112 through a screw 13 arranged in the leakage-proof cover 12, so that the leakage-proof cover 12 can be fixed in the atomizing head body 11 to avoid falling off.

[0049] During the liquid returning process, there may be some liquid remaining in the atomizing head 1, or even if part of the liquid enters the atomizing cavity 14 through the liquid returning channel 4, in view of this situation, as shown in Figure 2 , Figure 6 and Figure 7As shown, the oil storage structure 7 is arranged in the atomizing cavity 14 for temporarily storing liquid, and has an oil storage shell 72. An upper end of the oil storage shell 72 forms the mist outlet 16, and a lower end of the oil storage shell 72 is provided with a plurality of mist inlets 71. In the transverse direction, the mist inlets 71 are arranged in a staggered manner with the mist outlet 16. The aerosol formed by the atomizing core 9 enters the oil storage structure 7 from the mist inlets 71 and is discharged out of the atomizing head 1 from the mist outlet 16. By arranging the oil storage structure 7, liquid will not flow out of the mist outlet 16 of the atomizing head 1 no matter whether it is tilted by 90 degrees or 180 degrees.

[0050] Specifically, the atomizing head body 11 is formed with a cylindrical mounting portion 113, and the oil storage structure 7 is inserted into the mounting portion 113. The oil storage shell 72 includes an upper shell 721 and a lower shell 722. The upper shell 721 is formed with the mist outlet 16, and the mist outlet 16 is formed with a protruding step portion 73 downward. An inner wall of the upper shell 721 and the step portion 73 form an oil storage space 74 therebetween. The lower shell 722 is formed with the mist inlets 71. By dividing the oil storage shell 72 into the upper shell 721 and the lower shell 722, the user can disassemble and clean the oil storage shell 72. The protruding step portion 73 is arranged to have a certain height, so that liquid in the oil storage space 74 needs to accumulate to a certain height before flowing to the outlet of the atomizing head 1, which can better prevent liquid from leaking out.

[0051] As shown in the drawings, Figures 9-11 In the present application, the atomizing core 9 and the liquid suction pipe 10 extending into the liquid storage bottle 8 can be directly connected or indirectly connected. In the present embodiment, indirect connection is adopted, i.e., the fragrance diffusion device in the present embodiment further includes an atomizing seat 6, the atomizing core 9 is fixed on the atomizing seat 6, the atomizing seat 6 is arranged in the leakage-proof cover 12 and adjacent to the leakage-proof vent 2, and the liquid suction pipe 10 penetrates through the leakage-proof cover 12 and is connected with the atomizing seat 6 to form indirect connection. Because liquid will return to the atomizing cavity 14 through the oil storage structure 7 and then drip into the leakage-proof cover 12, if the atomizing seat 6 is not arranged in the leakage-proof cover 12, the volume of the atomizing head 1 needs to be increased, and there will be a problem of liquid not being able to return, or even liquid leakage.

[0052] Therefore, the atomizing seat 6 is arranged in the leakage-proof cover 12 in the present application to avoid the problems of liquid not being able to return and liquid leakage, and effectively reduce the volume of the atomizing head 1, so that the structure is more compact.

[0053] At the same time, because the atomizing seat 6 is arranged beside the leakage-proof vent 2, when liquid in the atomizing cavity 14 drips into the leakage-proof cover 12, the liquid can drip into the movable cavity 23 more quickly. If the return speed of liquid is further improved, a guide surface can be arranged on the bottom surface of the leakage-proof cover 12 to accelerate the return speed of liquid.

[0054] Specifically, the liquid suction tube 10 is inserted into the bottom of the atomizing seat 6 and communicates with the inside of the atomizing seat 6, and the liquid in the liquid storage bottle 8 enters the atomizing seat 6 through the liquid suction tube 10 and is atomized by the atomizing core 9 through the atomizing seat 6.

[0055] In order to facilitate the user to replace the atomizing seat 6 later, the atomizing seat 6 of the present application is fixed in the leak-proof cover 12 in a detachable manner, that is, the fourth fixing member 122 is arranged in the leak-proof cover 12, the fourth fixing member 122 is arranged in a circular shape, and the atomizing seat 6 is embedded in the fourth fixing member 122, so that the atomizing seat 6 is fixed in the leak-proof cover 12.

[0056] The atomizing seat 6 is provided with a connecting column 62, a gas guiding column 61 and a liquid suction column 63, the atomizing core 9 is fixed on the gas guiding column 61 and the liquid suction column 63, the connecting column 62 is connected with the air inlet pipeline in the atomizing head 1, the liquid suction column 63 communicates with the atomizing seat 6, the connecting column 62 communicates with the gas guiding column 61, and the gas can enter the atomizing head 1 through the air inlet hole 15 of the atomizing head 1 and then be transported through the air inlet pipeline, the connecting column 62 and the gas guiding column 61.

[0057] Beneficial effects:

[0058] The structure not only guarantees the anti-leakage effect, but also reduces the manufacturing cost.

[0059] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature can be directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0060] In the description of the present application, the description of the terms "preferred embodiment", "further embodiment", "other embodiment" or "specific example" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0061] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. An apparatus for diffusing fragrance, comprising an atomizing head, an atomizing core and a liquid storage bottle, the atomizing core and the liquid storage bottle are connected with the atomizing head, the atomizing core is connected with a liquid suction tube which extends into the liquid storage bottle, the atomizing head is used for supplying gas to the atomizing core, the atomizing core is used for atomizing liquid in the liquid storage bottle, liquid of the atomizing head passes through an atomizing cavity of the atomizing head and is discharged from a mist outlet of the atomizing head, characterized in that, The atomizing head is in sealed connection with the liquid storage bottle, the atomizing head is provided with a leakage-proof air passage piece, the leakage-proof air passage piece extends into the liquid storage bottle, the leakage-proof air passage piece is provided with a movable cavity and a locking ball which can roll in the movable cavity, the leakage-proof air passage piece is further provided with a liquid return channel which is in communication with the movable cavity and an air passage hole, the liquid return channel is located between the atomizing cavity and the movable cavity, the air passage hole is located between the movable cavity and the inside space of the liquid storage bottle, the aperture of the liquid return channel is 0.5mm-2mm; When the fragrance expanding device is in the first state, one end of the liquid return channel towards the movable cavity is not blocked by the locking ball, so that the liquid return channel is communicated with the air passage hole, when the fragrance expanding device is in the second state, the locking ball blocks one end of the liquid return channel towards the movable cavity, so that the liquid return channel is not communicated with the air passage hole.

2. The fragrance diffusing apparatus according to claim 1, wherein The upper end of the movable cavity is open, the leakage-proof air passage piece further comprises a sealing piece which detachably seals the upper end of the movable cavity, the liquid return channel is arranged on the sealing piece.

3. The fragrance diffusing apparatus according to claim 2, wherein The bottom of the liquid return channel is provided with an inner concave arc structure, when the fragrance expanding device is in the second state, the locking ball rolls into the arc structure to block the liquid return channel, the aperture of the liquid return channel is 0.8-1.6mm.

4. The fragrance diffusing apparatus according to claim 1, wherein The bottom end of the leakage-proof air passage piece is provided with a liquid return hole which is in communication with the movable cavity, the liquid return hole is located between the movable cavity and the inside space of the liquid storage bottle.

5. The fragrance diffusing apparatus according to claim 1, wherein The atomizing head comprises an atomizing head body, a liquid storage bottle connecting part and a leakage-proof cover, the liquid storage bottle connecting part and the leakage-proof cover are connected to the bottom end of the atomizing head body, the liquid storage bottle connecting part is in the shape of a ring, the leakage-proof cover is located on the inner side of the liquid storage bottle connecting part and is spaced apart from the liquid storage bottle connecting part by a preset distance, the bottle mouth of the liquid storage bottle is connected to the liquid storage bottle connecting part and is located between the leakage-proof cover and the liquid storage bottle connecting part, the leakage-proof cover is inserted into the bottle mouth of the liquid storage bottle and is in sealed cooperation with the bottle mouth of the liquid storage bottle, the liquid suction pipe passes through the leakage-proof cover and extends into the liquid storage bottle, the leakage-proof air passage piece is arranged on the leakage-proof cover and is adjacent to the liquid suction pipe.

6. The fragrance diffusing apparatus according to claim 5, wherein The bottom end of the atomizing head body is further provided with a third fixing piece, the leakage-proof cover is connected to the third fixing piece through a screw arranged in the leakage-proof cover.

7. The fragrance diffusing apparatus of claim 1, wherein the fragrance diffusing apparatus further comprises a fragrance diffusing device. The atomizing cavity is provided with an oil storage structure, the oil storage structure has an oil storage shell, the upper end of the oil storage shell forms the mist outlet, the lower end of the oil storage shell is provided with a mist inlet, in the transverse direction, the mist inlet and the mist outlet are arranged in a staggered manner, the aerosol formed by the atomizing core enters the oil storage structure from the mist inlet and is discharged out of the atomizing head from the mist outlet.

8. The fragrance diffusing apparatus according to claim 7, wherein A cylindrical mounting part is formed in the atomizing head body, the oil storage structure is inserted into the mounting part, the oil storage shell comprises an upper shell and a lower shell, the mist outlet is formed on the upper shell, the mist outlet downwardly forms a protruding step part, an oil storage space is formed between the inner wall of the upper shell and the step part, the mist inlet is formed on the lower shell.

9. The fragrance diffusing apparatus of claim 5, wherein the fragrance diffusing apparatus further comprises a fan. The atomizing seat is fixed on the atomizing core, and the atomizing seat is arranged in the leakage-proof cover. The liquid in the liquid storage bottle enters the atomizing seat through the liquid suction pipe and is atomized by the atomizing core.

10. The fragrance diffusing apparatus according to claim 9, wherein The fourth fixing member is arranged in the leakage-proof cover, and the atomizing seat is embedded in the fourth fixing member, so that the atomizing seat is fixed in the leakage-proof cover.

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