Air pump noise reduction structure and fragrance diffuser

Abstract

The utility model discloses a kind of air pump noise reduction structure and fragrance expander, including air pump, air pump has air pump shell, air pump shell is provided with at least one air pump air inlet, and air pump shell is attached with a layer of sound insulation structure on outer periphery, sound insulation structure extends along the axial direction of air pump shell and terminates at air pump air inlet, so that air pump air inlet is completely exposed in airflow environment.The utility model optimizes the sound insulation structure of air pump, improves from full package structure to non full package structure, air pump air inlet is not accidentally blocked in any case, let air pump air inlet be completely exposed in airflow environment, provide smooth and unobstructed passage for air intake, while ensuring that sound insulation structure can eliminate the mechanical noise generated by air pump body, fundamentally eliminate airflow noise generated due to airflow friction gap, reduce the overall integrated noise level of fragrance expander when running, create extremely quiet environment for user.

Description

Technical Field

[0001] This utility model relates to the field of aromatherapy equipment technology, specifically to an air pump noise reduction structure and an aroma diffuser. Background Technology

[0002] Aroma diffusers, as household or in-car appliances that diffuse fragrances, purify the air, or increase ambient humidity, need to operate quietly to create a comfortable and tranquil atmosphere. Aroma diffusers typically contain an air pump that generates airflow to atomize and expel essential oils. However, the air pump itself generates vibration and mechanical noise during operation. To reduce air pump noise, the common approach in current technology is to wrap the air pump with a layer of sound-absorbing cotton, forming a fully enclosed structure. While this fully enclosed sound-absorbing cotton structure effectively suppresses the vibration and mechanical noise of the air pump itself from propagating outwards, it also introduces new noise problems.

[0003] The air pump needs to continuously draw in air to operate. Therefore, the sound insulation cotton located at the air inlet of the air pump must have an air intake gap to allow outside air to enter. When the air pump is drawing air, the outside air must pass through the air intake gap in the sound insulation cotton at high speed. The airflow generates intense friction and eddies with the edge of the gap, producing a high-frequency "hissing" sound. Its noise reduction effect is not ideal, affecting the user experience. Furthermore, the fully enclosed structure also obstructs the air pump's intake to some extent, reducing the air pump's intake efficiency. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of the existing technology by providing an air pump noise reduction structure and a diffuser. The sound insulation structure of the air pump is improved, ensuring that the sound insulation structure can eliminate the mechanical noise generated by the air pump body, while fundamentally eliminating the airflow noise caused by airflow friction gaps.

[0005] To achieve this objective, the present invention adopts the following technical solution: On the one hand, the present invention provides a noise reduction structure for an air pump, including an air pump, the air pump having an air pump housing, the air pump housing having at least one air pump inlet, and a sound insulation structure being attached to the outer periphery of the air pump housing, the sound insulation structure extending along the axial direction of the air pump housing and terminating at the air pump inlet, so that the air pump inlet is completely exposed to the airflow environment.

[0006] As a preferred embodiment of the noise reduction structure for an air pump, the sound insulation structure is an annular sound insulation cotton, which is sleeved on part of the air pump housing, and the inner sidewall of the annular sound insulation cotton is tightly fitted to the outer sidewall of the air pump housing.

[0007] As a preferred embodiment of the noise reduction structure for an air pump, the sound insulation structure comprises several arc-shaped sound insulation cottons, which are distributed radially at intervals along the air pump housing, and the inner sidewalls of the arc-shaped sound insulation cottons are tightly fitted to the outer sidewalls of the air pump housing.

[0008] As a preferred embodiment of the noise reduction structure for an air pump, the air pump housing includes a pump head compartment and a motor compartment distributed vertically, the motor compartment and the pump head compartment being integrally formed, and the air pump inlet being located in the pump head compartment.

[0009] As a preferred embodiment of the air pump noise reduction structure, the radial dimension of the pump head compartment is larger than that of the motor compartment, so that the connection between the motor compartment and the pump head compartment forms an annular platform in the radial direction, and the air pump inlet is located at the annular platform.

[0010] As a preferred embodiment of the air pump noise reduction structure, the sound insulation structure is disposed on the outer wall of the pump head compartment and extends axially toward the outer periphery of the annular platform. The sound insulation structure is perpendicular to the annular platform to ensure that the air pump inlet is fully exposed to the airflow environment.

[0011] On the other hand, this utility model provides a diffuser, including the above-mentioned air pump noise reduction structure, and further including: An outer casing having a receiving space; The mounting base is disposed within the accommodating space of the outer shell, and the mounting base is provided with a receiving cavity. The air pump is disposed within the receiving cavity, and the outer side wall of the sound insulation structure is tightly fitted with the inner side wall of the receiving cavity. Inner liner, which is disposed within the accommodating space of the outer shell; An essential oil bottle, wherein the essential oil bottle is disposed within the inner liner; An atomizing cap is detachably connected to both the inner liner and the essential oil bottle, and is used to atomize the essential oil. Atomizing head, which is detachably connected to the atomizing cap, to allow essential oil mist to flow out to the outside.

[0012] As a preferred embodiment of the diffuser, one end of the receiving cavity is provided with a through hole, the output end of the air pump is located in the through hole, the end of the receiving cavity away from the through hole is provided with an opening, the outer shell has a first flow channel gap, and external airflow enters the air pump through the first flow channel gap, the opening and the air pump inlet in sequence.

[0013] As a preferred embodiment of the aroma diffuser, the inner liner is fixed to the mounting base by a connector, and a gap is left between the inner liner and the mounting base to form a second flow channel gap. A gap is left between the inner liner and the outer shell to form a third flow channel gap. The third flow channel gap communicates with the second flow channel gap. A connecting hole is also provided on the side wall of the inner liner. The third flow channel gap communicates with the atomizing cover through the connecting hole to allow gas to flow into the atomizing cover.

[0014] As a preferred embodiment of the diffuser, a first sealing ring is provided between the top outer wall of the mounting base and the inner wall of the outer shell to prevent gas from flowing out of the second flow channel gap; a second sealing ring is provided between the top outer wall of the inner liner and the inner wall of the outer shell to prevent gas from flowing out of the third flow channel gap.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) This utility model optimizes the sound insulation structure of the air pump, and improves the full-enclosed structure into a non-full-enclosed structure. The air pump inlet will not be accidentally blocked under any circumstances, allowing the air pump inlet to be fully exposed to the airflow environment, providing a smooth and unobstructed channel for the air pump to enter. While ensuring that the sound insulation structure can eliminate the mechanical noise generated by the air pump body, it also fundamentally eliminates the airflow noise caused by the airflow friction gap, reduces the overall noise level of the diffuser during operation, and creates an extremely quiet environment for users. It is especially suitable for bedrooms, studies and other scenarios with extremely high requirements for quietness.

[0016] (2) The non-full-enclosed structure adopted by this utility model avoids the risk of dust clogging the air intake gap of the prior art, reduces the air intake resistance of the air pump, and ensures the air intake smoothness required for the long-term stable operation of the air pump, thereby improving the service life and reliability of the product. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the air pump noise reduction structure described in Embodiment 1 of this utility model.

[0019] Figure 2 This is a schematic diagram showing the disassembled structure of the air pump noise reduction structure described in Embodiment 1 of this utility model.

[0020] Figure 3This is a schematic diagram of the air pump described in Embodiment 1 of this utility model.

[0021] Figure 4 This is a schematic diagram of the air pump noise reduction structure described in Embodiment 2 of this utility model.

[0022] Figure 5 This is a schematic diagram of the overall structure of the diffuser described in Embodiment 3 of this utility model.

[0023] Figure 6 This is a schematic diagram of the disassembled structure of the aroma diffuser described in Embodiment 3 of this utility model.

[0024] Figure 7 This is a cross-sectional structural diagram of the diffuser described in Embodiment 3 of this utility model.

[0025] Figure 8 This is a schematic diagram showing the disassembled structure of the air pump, mounting base, and inner liner as described in Embodiment 3 of this utility model.

[0026] Explanation of reference numerals in the attached figures: 1. Air pump; 101. Air pump housing; 1011. Pump head compartment; 1012. Motor compartment; 1013. Annular platform; 102. Air pump inlet; 2. Sound insulation structure; 3. Outer shell; 4. Mounting base; 41. Receiving cavity; 42. Through hole; 43. Opening; 5. Inner liner; 6. Essential oil bottle; 7. Atomizing cap; 8. Atomizing head; 9. Second flow channel gap; 10. Third flow channel gap; 11. Connecting hole; 12. First sealing ring; 13. Second sealing ring. Detailed Implementation

[0027] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0029] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Example 1: like Figure 1 As shown, this embodiment provides a noise reduction structure for an air pump, including an air pump 1. The air pump 1 has an air pump housing 101, and the air pump housing 101 is provided with at least one air pump inlet 102. External airflow can enter the air pump 1 through the air pump inlet 102. A sound insulation structure 2 is attached to the outer periphery of the air pump housing 101. The sound insulation structure 2 extends along the axial direction of the air pump housing 101 and terminates at the air pump inlet 102, thereby forming a new non-fully enclosed structure. The air pump inlet 102 will not be accidentally blocked under any circumstances, allowing the air pump inlet 102 to be completely exposed to the airflow environment, providing a smooth and unobstructed channel for the air pump 1 to enter. The sound insulation structure 2 of this embodiment not only ensures that the mechanical noise generated by the air pump 1 body can be eliminated, but also fundamentally eliminates the airflow noise generated by the airflow friction gap, reducing the overall comprehensive noise level of the diffuser during operation, creating an extremely quiet environment for users, and is particularly suitable for scenarios with extremely high requirements for quietness, such as bedrooms and studies.

[0032] It should be noted that the air pump inlet 102 in this embodiment can be freely set according to the required air intake volume and air intake efficiency of the air pump 1, so as to ensure that the air pump 1 can operate efficiently.

[0033] Specifically, the sound insulation structure 2 in this embodiment can be implemented in the following form: like Figure 2As shown, the sound insulation structure 2 uses annular sound insulation cotton, which is sleeved on part of the air pump housing 101, so that the inner wall of the annular sound insulation cotton is tightly fitted with the outer wall of the air pump housing 101. At the same time, the end of the annular sound insulation cotton stops at the air pump inlet 102, thereby avoiding obstruction of the air intake process of the air pump inlet 102.

[0034] More specifically, the air pump housing 101 in this embodiment can adopt the following structure to cooperate with the sound insulation structure 2: like Figure 3 As shown, the air pump housing 101 includes a pump head compartment 1011 and a motor compartment 1012 distributed vertically. The motor compartment 1012 and the pump head compartment 1011 are integrally molded. At the same time, the radial dimension of the pump head compartment 1011 is set to be larger than the radial dimension of the motor compartment 1012, so that the connection between the motor compartment 1012 and the pump head compartment 1011 forms an annular platform 1013 in the radial direction. The air pump inlet 102 is located at the annular platform 1013.

[0035] Since the main source of vibration for the air pump 1 is the reciprocating motion of the pump head compartment 1011, while the motor compartment 1012 only causes some minor vibrations and noise, the annular sound insulation cotton in this embodiment is installed on the outer wall of the pump head compartment 1011 and extends axially towards the outer periphery of the annular platform 1013, thereby wrapping the outer wall of the pump head compartment 1011. At the same time, the annular sound insulation cotton is perpendicular to the annular platform 1013 and does not obstruct the air pump inlet 102, thus ensuring that the air pump inlet 102 is completely exposed to the airflow environment. This non-fully enclosed structure avoids the risk of dust clogging the air intake gaps of the prior art, reduces the air intake resistance of the air pump 1, and ensures the air intake smoothness required for the long-term stable operation of the air pump 1, thereby improving the service life and reliability of the product.

[0036] It should be noted that the fixing methods of the annular sound insulation cotton include, but are not limited to, adhesive bonding, snap-fit ​​connection, or interference fit. For example, the annular sound insulation cotton can be fixed to the outer periphery of the pump head compartment 1011 with adhesive. This structure is not only firmly fixed, but also has a simple assembly process and is suitable for mass production.

[0037] Example 2: The air pump noise reduction structure in this embodiment is basically the same as that in Embodiment 1. The main difference lies in the structural design of the sound insulation structure 2.

[0038] like Figure 4 As shown, the sound insulation structure 2 in this embodiment uses several arc-shaped sound insulation cottons. The arc-shaped sound insulation cottons are distributed radially along the air pump housing 101. The inner sidewall of the arc-shaped sound insulation cottons is tightly attached to the outer sidewall of the air pump housing 101. At the same time, the end of the arc-shaped sound insulation cottons stops at the air pump inlet 102, thereby avoiding obstruction to the air intake process of the air pump inlet 102.

[0039] It should be noted that the number of arc-shaped sound insulation cotton can be freely set according to the size of the air pump housing 101. In this embodiment, two arc-shaped sound insulation cotton are preferably used.

[0040] More specifically, the air pump housing 101 in this embodiment can adopt the following structure to cooperate with the sound insulation structure 2: The air pump housing 101 includes a pump head compartment 1011 and a motor compartment 1012 distributed vertically. The motor compartment 1012 and the pump head compartment 1011 are integrally molded. The radial dimension of the pump head compartment 1011 is set to be larger than the radial dimension of the motor compartment 1012, so that the connection between the motor compartment 1012 and the pump head compartment 1011 forms an annular platform 1013 in the radial direction. The air pump inlet 102 is located at the annular platform 1013.

[0041] Since the main source of vibration for the air pump 1 is the reciprocating motion of the pump head compartment 1011, while the motor compartment 1012 only causes some minor vibrations and noise, the arc-shaped sound insulation cotton in this embodiment is installed on the outer wall of the pump head compartment 1011 and extends axially towards the outer periphery of the annular platform 1013, thereby wrapping the outer wall of the pump head compartment 1011. At the same time, the arc-shaped sound insulation cotton is perpendicular to the annular platform 1013 and does not obstruct the air pump inlet 102, thus ensuring that the air pump inlet 102 is completely exposed to the airflow environment. This non-fully enclosed structure avoids the risk of dust clogging the air intake gaps of the prior art, reduces the air intake resistance of the air pump 1, and ensures the air intake smoothness required for the long-term stable operation of the air pump 1, thereby improving the service life and reliability of the product.

[0042] The arc-shaped sound insulation cotton used in this embodiment not only does not sacrifice the core noise reduction function, but also brings additional positive effects in terms of heat dissipation, cost and acoustic performance.

[0043] The gaps between the arc-shaped sound insulation cotton form natural heat dissipation channels, allowing the heat generated by the air pump 1 to be directly exchanged with the surrounding air through these gaps, thereby improving the heat dissipation conditions of the air pump 1.

[0044] Meanwhile, the curved sound insulation cotton design reduces the amount of sound insulation cotton used, giving it a certain cost advantage.

[0045] Furthermore, the design of the arc-shaped sound insulation cotton constitutes a discontinuous vibration isolation system. This structure can effectively disrupt and absorb sound waves of different frequencies, especially for certain low-to-medium frequency vibration noises, where its attenuation effect is superior to that of ring-shaped sound insulation cotton.

[0046] Example 3: like Figure 5 and Figure 6As shown, this embodiment provides a diffuser, including the air pump noise reduction structure of Embodiment 1 or Embodiment 2, and also includes a shell 3, a mounting base 4, an inner liner 5, an essential oil bottle 6, an atomizing cap 7, an atomizing head 8, and other structures.

[0047] The outer shell 3 has a accommodating space, and the inner liner 5 and the mounting base 4 are both located within the accommodating space of the outer shell 3. The mounting base 4 is provided with a receiving cavity 41, and the air pump 1 is located in the receiving cavity 41. The outer side wall of the sound insulation structure 2 is tightly fitted with the inner side wall of the receiving cavity 41. The essential oil bottle 6 is located inside the inner liner 5. The atomizing cap 7 is detachably connected to the inner liner 5 and the essential oil bottle 6 respectively, and is used to atomize the essential oil. The atomizing head 8 is detachably connected to the atomizing cap 7 to allow the essential oil mist to flow out to the outside.

[0048] like Figure 8 As shown, in this embodiment, one end of the receiving cavity 41 is provided with a through hole 42, the output end of the air pump 1 is located in the through hole 42, the end of the receiving cavity 41 away from the through hole 42 is provided with an opening 43, the outer shell 3 has a first flow channel gap, and the external airflow enters the air pump 1 through the first flow channel gap, the opening 43 and the air pump inlet 102 in sequence.

[0049] It is understood that the first flow channel gap described in this embodiment can be a channel specially opened in the housing 3, or it can be composed of gaps between the housing 3 and various components. For example, the housing 3 is provided with several control buttons and USB or Type-C interfaces required for charging. External airflow can enter the housing 3's accommodating space through the gap between the control buttons and the housing 3 or the charging interface, thereby providing the required gas to the air pump 1.

[0050] like Figure 7 As shown, the inner liner 5 is fixed to the mounting base 4 by a connector, and a gap is left between the inner liner 5 and the mounting base 4 to form a second flow channel gap 9. A gap is left between the inner liner 5 and the outer shell 3 to form a third flow channel gap 10. The third flow channel gap 10 communicates with the second flow channel gap 9. A connecting hole 11 is also provided on the side wall of the inner liner 5. The third flow channel gap 10 communicates with the atomizing cover 7 through the connecting hole 11. When the air pump 1 is working, the gas generated will first enter the second flow channel gap 9, and then enter the third flow channel gap 10 along the second flow channel gap 9, and then pass through the connecting hole 11. Entering the atomizing cap 7, which contains the atomizing core, the airflow is ejected at high speed from the nozzle of the atomizing core. According to Bernoulli's principle, the faster the fluid velocity, the lower its lateral pressure. Therefore, a low-pressure zone will be formed inside the atomizing core. Under the action of air pressure, the essential oil in the essential oil bottle 6 will enter the atomizing core through the oil suction tube and flow out from the oil outlet. The flowing essential oil will violently collide and shear with the high-speed airflow ejected from the nozzle, thus being atomized into ultrafine particles. The atomized essential oil will flow out into the external environment through the atomizing head 8, thereby achieving the aromatherapy function.

[0051] It should be noted that the connector described in this embodiment can be a bolt. By opening a hole in the top of the mounting base 4 and opening a threaded groove on the bottom of the inner liner 5 near the mounting base 4, the bolt passes through the mounting base 4 and is threadedly connected to the threaded groove at the bottom of the inner liner 5, thereby achieving a fast connection. Similarly, the connector described in this embodiment can also be a plug rod. By opening a hole at the top of the mounting base 4 and opening a slot on the side of the inner liner 5 near the mounting base 4, the plug rod passes through the mounting base 4 and engages with the slot at the bottom of the inner liner 5 to achieve a tight connection.

[0052] It is understood that the connectors described in this embodiment are not limited to the connection methods listed above, and can also be connected by other fastening methods, as long as there is a gap between the inner liner 5 and the mounting base 4. These will not be described in detail here.

[0053] A first sealing ring 12 is provided between the top outer wall of the mounting base 4 and the inner wall of the outer shell 3 to prevent gas from flowing out of the second flow channel gap 9; a second sealing ring 13 is provided between the top outer wall of the inner liner 5 and the inner wall of the outer shell 3 to prevent gas from flowing out of the third flow channel gap 10.

[0054] It should be noted that this utility model does not involve improvements to the atomizing head 8 and the oil suction tube. The atomizing head 8 and the oil suction tube can refer to the prior art. For example, the oil suction tube can refer to the utility model patent "A novel flow guiding device and a container containing the same" with publication number CN220195287U, while the atomizing head 8 can refer to the utility model patent "An oil leakage preventer" with publication number CN220424250U.

[0055] It is understood that the housing 3 in this embodiment also houses components such as a controller and a battery pack to achieve intelligent control of the diffuser. This invention does not involve improvements to these structures, and will not be elaborated upon here.

[0056] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A noise reduction structure for an air pump, characterized in that, The device includes an air pump (1), which has an air pump housing (101) and at least one air pump inlet (102). A sound insulation structure (2) is attached to the outer periphery of the air pump housing (101). The sound insulation structure (2) extends along the axial direction of the air pump housing (101) and terminates at the air pump inlet (102), so that the air pump inlet (102) is completely exposed to the airflow environment.

2. The air pump noise reduction structure according to claim 1, characterized in that, The sound insulation structure (2) is an annular sound insulation cotton, which is sleeved on part of the air pump housing (101), and the inner wall of the annular sound insulation cotton is tightly fitted to the outer wall of the air pump housing (101).

3. The air pump noise reduction structure according to claim 1, characterized in that, The sound insulation structure (2) consists of several arc-shaped sound insulation cottons, which are distributed radially along the air pump housing (101). The inner sidewall of the arc-shaped sound insulation cottons is closely attached to the outer sidewall of the air pump housing (101).

4. The air pump noise reduction structure according to claim 1, characterized in that, The air pump housing (101) includes a pump head compartment (1011) and a motor compartment (1012) distributed vertically. The motor compartment (1012) and the pump head compartment (1011) are integrally formed. The air pump inlet (102) is located in the pump head compartment (1011).

5. The air pump noise reduction structure according to claim 4, characterized in that, The radial dimension of the pump head compartment (1011) is larger than that of the motor compartment (1012), such that the connection between the motor compartment (1012) and the pump head compartment (1011) forms an annular platform (1013) in the radial direction, and the air pump inlet (102) is located at the annular platform (1013).

6. The air pump noise reduction structure according to claim 5, characterized in that, The sound insulation structure (2) is disposed on the outer wall of the pump head compartment (1011) and extends axially toward the pump head compartment (1011) to the outer periphery of the annular platform (1013). The sound insulation structure (2) is perpendicular to the annular platform (1013) to ensure that the air pump inlet (102) is completely exposed to the airflow environment.

7. A diffuser, comprising the air pump noise reduction structure as described in any one of claims 1-6, characterized in that, Also includes: The outer casing (3) has an accommodating space; Mounting base (4), the mounting base (4) is disposed in the accommodating space of the outer shell (3), and the mounting base (4) is provided with a receiving cavity (41), the air pump (1) is disposed in the receiving cavity (41), and the outer side wall of the sound insulation structure (2) is tightly fitted with the inner side wall of the receiving cavity (41); Inner liner (5), the inner liner (5) is disposed within the accommodating space of the outer shell (3); An essential oil bottle (6) is disposed inside the inner liner (5); Atomizing cap (7) is detachably connected to the inner liner (5) and the essential oil bottle (6) respectively, and is used to atomize the essential oil; Atomizing head (8) is detachably connected to the atomizing cap (7) to allow essential oil mist to flow out to the outside.

8. The diffuser according to claim 7, characterized in that, One end of the receiving cavity (41) is provided with a through hole (42), the output end of the air pump (1) is located in the through hole (42), the end of the receiving cavity (41) away from the through hole (42) is provided with an opening (43), the outer shell (3) has a first flow channel gap, and the external airflow enters the air pump (1) through the first flow channel gap, the opening (43) and the air pump inlet (102) in sequence.

9. The diffuser according to claim 8, characterized in that, The inner liner (5) is fixed to the mounting base (4) by a connector, and a gap is left between the inner liner (5) and the mounting base (4) to form a second flow channel gap (9). A gap is left between the inner liner (5) and the outer shell (3) to form a third flow channel gap (10). The third flow channel gap (10) communicates with the second flow channel gap (9). A connecting hole (11) is also provided on the side wall of the inner liner (5). The third flow channel gap (10) communicates with the atomizing cover (7) through the connecting hole (11) so that gas can flow into the atomizing cover (7).

10. The diffuser according to claim 9, characterized in that, A first sealing ring (12) is provided between the top outer wall of the mounting base (4) and the inner wall of the outer shell (3) to prevent gas from flowing out of the second flow channel gap (9); a second sealing ring (13) is provided between the top outer wall of the inner liner (5) and the inner wall of the outer shell (3) to prevent gas from flowing out of the third flow channel gap (10).

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