Vehicle-mounted fragrance machine based on vehicle-mounted air supply system

By connecting the in-vehicle air supply system with the air duct system of the fragrance diffuser, the built-in fan is eliminated, solving the problems of high cost, complex structure and noise of traditional in-vehicle fragrance diffusers. This achieves uniform evaporation and diverse mixing of fragrances, improving the user experience.

CN223934508UActive Publication Date: 2026-02-24XIAMEN MAXMAC AIR TECH
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Patent Information

Application Number
CN202520649751.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-08
Publication Date
2026-02-24
Estimated Expiration
2035-04-08

AI Technical Summary

Technical Problem

Traditional car fragrance diffusers rely on built-in fans, resulting in high equipment costs, complex structures, large space requirements, and noise that affects quietness.

Method used

By connecting the car's built-in air supply system with the air duct system inside the fragrance diffuser, the fragrance is released through the air intake and exhaust pipes. The built-in fan is eliminated, and a motor is used to control the airflow and heating or atomizing plate to enhance the fragrance release effect.

Benefits of technology

The simplified structure reduces costs and noise, enhances the user's driving experience, and enables uniform evaporation and diverse blending of fragrances.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a vehicle-mounted fragrance machine based on a vehicle-mounted air supply system. The vehicle-mounted fragrance machine comprises a shell, an air duct shell, a mixing bin and fragrance. The air duct shell and the mixing bin are sequentially installed in the shell, and an air channel inlet cavity and an air channel outlet cavity which are separated from each other are formed between the mixing bin and the bottom cover. An air duct is arranged in the air duct shell, fragrance is installed in the air duct, an air inlet cavity of the air duct is communicated with the air path inlet cavity, and an air outlet cavity of the air duct is communicated with the air path outlet cavity. An air inlet pipe and an air outlet pipe are mounted on the bottom cover, two ends of the air inlet pipe are communicated with the air passage inlet cavity and an external air supply system respectively, and the air outlet pipe is communicated with the air passage outlet cavity; the fragrance machine is simple in structure, the air supply system arranged in the automobile is connected into the fragrance machine to supply air so that fragrance volatilized by the fragrance bomb can be blown to the air outlet in the automobile, the cost and space of a fan arranged in the fragrance machine can be reduced, meanwhile, noise caused by the fan can be reduced, and a user can have more comfortable driving experience.
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Description

Technical Field

[0001] This utility model relates to the field of in-vehicle fragrance technology, specifically to an in-vehicle fragrance diffuser based on an in-vehicle air supply system. Background Technology

[0002] A car air freshener is a device that improves the air environment inside a car by emitting fragrance substances. It is widely used in the automotive industry. Currently, most products on the market use a built-in micro fan design to actively diffuse the fragrance emitted by the fragrance cartridges to the air vents inside the car to achieve air purification or odor regulation.

[0003] Traditional car fragrance diffusers rely on built-in fans to drive airflow, which leads to the following drawbacks: First, the fan hardware increases the cost and structural complexity of the equipment; second, the fan occupies internal space in the fragrance diffuser, limiting the miniaturization of the product; and third, the noise generated by the fan affects the quietness of the car interior. Therefore, there is an urgent need for a more efficient and low-cost car fragrance diffuser solution to optimize the user experience.

[0004] Patent document CN205905717U discloses a car air freshener, comprising: a base with a slot and a hollow suction cup at its bottom; a body that is fitted into the slot of the base, the body having an air inlet and an air outlet, a storage chamber within the body, a diffusion hole at the top of the storage chamber, a fan at the bottom of the storage chamber, and a temperature control device within the storage chamber; and a controller connected to the fan and the temperature control device to control the fan speed and the on / off state of the temperature control device. This invention features a storage chamber where essential oils are placed, and the fan causes the essential oils to evaporate, achieving an aromatherapy effect. However, this solution, which uses a fan within the storage chamber, suffers from structural complexity, occupies internal space, and generates noise. Utility Model Content

[0005] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a car fragrance diffuser based on a car air supply system.

[0006] The vehicle-mounted fragrance diffuser based on a vehicle-mounted air supply system provided by this utility model includes an upper cover, a bottom cover, an air duct housing, a mixing chamber, and a fragrance diffuser.

[0007] The upper cover covers the lower cover and forms a shell. The air duct shell and the mixing chamber are installed inside the shell from top to bottom. The mixing chamber and the lower cover form a mutually separated air passage inlet and air passage outlet.

[0008] The air duct housing is provided with an air duct, the fragrance is installed inside the air duct, the air inlet chamber of the air duct is connected to the air passage in the oral cavity, and the air outlet chamber of the air duct is connected to the air passage outlet.

[0009] The bottom cover is equipped with an air inlet pipe and an air outlet pipe. The two ends of the air inlet pipe are respectively connected to the air passage inlet cavity and the external air supply system, and the air outlet pipe is connected to the air passage outlet cavity.

[0010] Air passes through the air inlet pipe, air passage into the oral cavity, and air inlet chamber before reaching the interior of the air duct. The fragrance evaporates under the action of air, and the evaporated fragrance mixed with air passes through the air outlet chamber, air passage out of the oral cavity, and air outlet pipe to reach the outside.

[0011] Preferably, the mixing chamber includes a top plate and an air passage baffle installed at the bottom of the top plate;

[0012] The air passage baffle is cylindrical, dividing the space between the top plate and the bottom cover into an internal air passage inlet and an external air passage outlet. The air inlet pipe is installed in the middle of the bottom end of the bottom cover and communicates with the air passage inlet. The air outlet is installed on the side of the bottom cover and communicates with the air passage outlet.

[0013] The top plate is provided with an air passage inlet and an air passage outlet, which are located inside and outside the air passage partition, respectively, and are connected to the air inlet chamber and the air outlet chamber, respectively.

[0014] Preferably, the air duct housing includes an upper air duct cover, a lower air duct cover, and multiple air ducts;

[0015] Multiple air ducts are used to install the same or different kinds of fragrances, and multiple air ducts are installed circumferentially between the upper cover and the lower cover of the air duct.

[0016] Preferably, the air passage partition is provided with a motor mounting part, and a motor is installed in the motor mounting part;

[0017] The output shaft at the top of the motor passes through the top plate and is connected to a baffle plate. The baffle plate includes blades corresponding to the air inlet and air outlet, which are used to close or open the air inlet and air outlet by rotation.

[0018] Preferably, a protective cover is provided between the air duct shell and the mixing chamber, and the protective cover is provided with a baffle mounting groove corresponding to the baffle.

[0019] The baffle can be rotatably installed in the baffle mounting groove, and the bottom of the baffle mounting groove is provided with through holes corresponding to the gas inlet and gas outlet;

[0020] In the closed state, the baffle rotates to abut against the first sidewall of the baffle mounting groove, and the blade covers the air passage inlet and air passage outlet;

[0021] In the open state, the baffle rotates to abut against the second side wall of the baffle mounting groove, and the blade does not cover the air passage inlet and air passage outlet.

[0022] Preferably, a heating module is provided at the bottom of the air duct for heating the fragrance, or an atomizing plate is provided at the bottom of the air duct for atomizing the fragrance;

[0023] A circuit board is installed inside the air duct housing, and the circuit board is electrically connected to the heating module or atomizing plate.

[0024] Preferably, it also includes a mixing cover, which is installed outside the mixing chamber, and the mixing chamber is assembled in the bottom cover by the mixing cover.

[0025] Preferably, the air duct includes an air duct body, an air inlet chamber, and an air outlet chamber;

[0026] The air duct body has a hollow structure and serves as a fragrance installation part for installing fragrances. The air inlet cavity is located on one side of the air duct body and is connected to the bottom of one side of the air duct body.

[0027] The air outlet cavity is located on the other side of the air duct body and is separated from the air duct body by a partition. The top of the partition has an opening. After passing through the air inlet cavity, air enters from the bottom of one side of the air duct body and exits from the top of the other side of the air duct body.

[0028] Preferably, the duct housing is provided with a duct mounting position, and the duct is installed in the duct mounting position;

[0029] A magnet is provided on the top of the air duct housing. The magnet is installed on the outside of the air duct mounting position and is used to magnetically fix the fragrance located inside the air duct.

[0030] Preferably, a sealing ring is provided between the top of the air duct housing and the top cover.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This invention has a simple structure. It utilizes the vehicle's built-in air supply system to connect to the air supply inside the fragrance diffuser, blowing the fragrance from the fragrance cartridges to the air vents inside the vehicle. This reduces the cost and space required for the built-in fan in the fragrance diffuser, while also reducing the noise generated by the fan, providing users with a more comfortable driving experience. Attached Figure Description

[0033] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0035] Figure 2 This is an overall exploded view of the present invention;

[0036] Figure 3 This is a schematic diagram of the assembly of the air intake pipe and the mixing chamber from a bottom view angle in this utility model;

[0037] Figure 4 This is a schematic diagram of the assembly of the air duct and protective cover in this utility model;

[0038] Figure 5 This is a schematic diagram of the mixing chamber in this utility model;

[0039] Figure 6 This is an assembly diagram of the blades, motor, and protective cover in this utility model;

[0040] Figure 7 This is a half-sectional schematic diagram of the present invention;

[0041] Figure 8 This is a schematic diagram of the fragrance structure in Embodiment 3 of this utility model;

[0042] Figure 9 This is a schematic diagram of the overall structure of Embodiment 4 of this utility model.

[0043] The diagram shows:

[0044] Fragrance 1 Protective Cover 8

[0045] Fragrance cap 101, baffle mounting slot 801

[0046] Metal magnetic 102 baffle 9

[0047] Rubber ring 103, Motor 10

[0048] Fragrance carrier 104 Circuit board 11

[0049] Outer shell 105, Mixing chamber 12

[0050] Heat-conducting plate 106, air inlet 121

[0051] Heating module 107, gas outlet 122

[0052] Top cover 2, air passage baffle 123

[0053] Magnet 3 Motor mounting part 124

[0054] Sealing ring 4, Mixing cap 13

[0055] Air duct top cover 5, bottom cover 14

[0056] Air duct 6, air intake pipe 15

[0057] Air outlet chamber 601, air outlet pipe 16

[0058] Air inlet cavity 602, atomizing plate 17

[0059] 7 Lower cover of the air duct Detailed Implementation

[0060] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0061] This utility model discloses a car fragrance diffuser based on a vehicle air supply system. It simplifies the original structure of the built-in fan and uses the vehicle's built-in air supply system to connect to the fragrance diffuser to blow the fragrance from the fragrance cartridges to the air outlets inside the vehicle. This reduces the cost and space required for the built-in fan in the fragrance diffuser, while also reducing the noise generated by the fan, giving users a more comfortable driving experience.

[0062] Example 1

[0063] This embodiment discloses a car-mounted fragrance diffuser based on a vehicle-mounted air supply system, such as... Figure 1-7 As shown, it includes an upper cover 2, a bottom cover 14, an air duct shell, a mixing chamber 12, and a fragrance 1; the upper cover 2 covers the bottom cover 14 and forms a shell, the air duct shell and the mixing chamber 12 are installed in the shell from top to bottom, and the mixing chamber 12 and the bottom cover 14 form mutually separated air passage inlet and air passage outlet.

[0064] An air duct 6 is provided inside the air duct housing, and the fragrance 1 is installed inside the air duct 6. The air inlet chamber 602 of the air duct 6 is connected to the air passage inlet cavity, and the air outlet chamber 601 of the air duct 6 is connected to the air passage outlet cavity. An air inlet pipe 15 and an air outlet pipe 16 are installed on the bottom cover 14. The two ends of the air inlet pipe 15 are respectively connected to the air passage inlet cavity and the external air supply system, and the air outlet pipe 16 is connected to the air passage outlet cavity.

[0065] like Figure 5 As shown, the mixing chamber 12 includes a top plate and an air passage partition 123 installed at the bottom of the top plate; the air passage partition 123 is cylindrical and divides the space between the top plate and the bottom cover 14 into an internal air passage inlet chamber and an external air passage outlet chamber. The air inlet pipe 15 is installed in the middle of the bottom end of the bottom cover 14 and communicates with the air passage inlet chamber. The air outlet chamber 601 is installed on the side of the bottom cover 14 and communicates with the air passage outlet chamber. The top plate is provided with an air passage inlet 121 and an air passage outlet 122. The air passage inlet 121 and the air passage outlet 122 are located inside and outside the air passage partition 123, respectively, and communicate with the air inlet chamber 602 and the air outlet chamber 601, respectively.

[0066] The mixing chamber 12 is externally provided with a mixing cover 13, and the mixing chamber 12 is assembled into the bottom cover 14 via the mixing cover 13. Figure 4 , Figure 7 As shown, the air duct 6 includes an air duct body, an air inlet chamber 602, and an air outlet chamber 601. The air duct body has a hollow structure and serves as a fragrance installation part for installing the fragrance 1. The air inlet chamber 602 is located on one side of the air duct body and is connected to the bottom of one side of the air duct body. The air outlet chamber 602 is located on the other side of the air duct body and is separated from the air duct body by a partition. The top of the partition has an opening. Air enters from the bottom of one side of the air duct body after passing through the air inlet chamber 602 and exits from the top of the other side of the air duct body. By setting the air inlet on one side at the bottom of the air duct 6 and the air outlet on the other side at the top of the air duct 6, air can pass through the fragrance 1 from bottom to top, thereby making the overall evaporation of the fragrance 1 more uniform.

[0067] In a preferred embodiment, the duct housing is provided with a duct mounting position, and the duct 6 is installed in the duct mounting position; a magnet 3 is provided on the top of the duct housing, and the magnet 3 is installed outside the duct mounting position for magnetically fixing the fragrance 1 located inside the duct 6, such as... Figure 7 As shown, the fragrance 1 is inserted into the air duct 6 through the cutout at the top of the top cover 2 and secured by the magnet 3 located at the top of the air duct housing. Figure 2 , Figure 7 As shown, a sealing ring 4 is provided between the top of the air duct housing and the top cover 2, thereby ensuring the airtightness of the entire car fragrance machine and preventing the gas inside the air duct housing from escaping from the gap between the air duct housing and the top cover 2.

[0068] like Figure 7 As shown, the working principle of this embodiment is as follows:

[0069] The air supplied by the vehicle's built-in air supply system first enters the air passage in the middle of the mixing chamber 12 through the air intake pipe 15, and then enters the air intake cavity 602 on one side of the air duct 6 through the air passage inlet 121. Subsequently, it travels from the bottom to the top of the air duct 6, allowing the fragrance 1 to fully evaporate. The air mixed with the evaporated fragrance 1 enters the air outlet cavity 601 on the other side of the air duct 6, and then enters the air passage outlet cavity through the air passage outlet 122. Finally, it reaches the external space through the air outlet pipe 16, completing the diffusion of the fragrance.

[0070] Example 2

[0071] This embodiment is a preferred embodiment of the above embodiments, and adds the function of opening and closing the gas path, such as... Figure 6As shown, a motor mounting part 124 is provided on the air passage partition 123, and a motor 10 is installed in the motor mounting part 124; the output shaft of the top of the motor 10 passes through the top plate and is connected to a baffle 9. The baffle 9 includes blades corresponding to the air passage inlet 121 and the air passage outlet 122, which are used to close or open the air passage inlet 121 and the air passage outlet 122 by rotation.

[0072] Furthermore, a protective cover 8 is provided between the air duct housing and the mixing chamber 12, and the protective cover 8 is provided with a baffle mounting groove 801 corresponding to the baffle 9; the baffle 9 is rotatably installed in the baffle mounting groove 801, and the bottom of the baffle mounting groove 801 is provided with through holes corresponding to the air passage inlet 121 and the air passage outlet 122.

[0073] The working principle of this embodiment is as follows:

[0074] In the closed state, the motor 10 rotates to drive the baffle 9 to rotate to the first angle. At this time, the baffle 9 rotates to abut against the first side wall of the baffle mounting groove 801, and the blade covers the air passage inlet 121 and the air passage outlet 122, and the internal air passage is closed.

[0075] In the open state, the motor 10 reverses to drive the baffle 9 to rotate to the second angle. At this time, the baffle 9 rotates to abut against the second side wall of the baffle mounting groove 801. The blade does not cover the air passage inlet 121 and air passage outlet 122. At this time, the internal air passage is open.

[0076] In a preferred embodiment, the duct housing includes an upper duct cover 5, a lower duct cover 7, and multiple ducts 6; the multiple ducts 6 are used to install the same or different types of fragrances 1, and the multiple ducts 6 are circumferentially installed between the upper duct cover 5 and the lower duct cover 7. By controlling the rotation of the baffle 9 by the motor 10, the ventilation and shut-off functions of different fragrances 1 can be realized, thereby switching between different mixed fragrance effects.

[0077] Example 3

[0078] This embodiment is a preferred embodiment of the above embodiments, such as... Figure 8 As shown, the fragrance 1 includes, from top to bottom, a fragrance cover 101, a metal magnet 102, a rubber ring 103, a shell 105, a heat-conducting sheet 106, and a heating module 107. The fragrance carrier 104 is disposed inside the shell 105. The top of the shell 105 is sealed to the fragrance cover 101 by the rubber ring 103. The metal magnet 102 is used to magnetically fix it to the magnet 3.

[0079] The heating module 107 is located at the bottom of the air duct 6 and is used to heat the fragrance 1. A circuit board 11 is provided inside the air duct housing. The circuit board 11 is electrically connected to the heating module 107 and an interface is provided on one side of the circuit board 11. The interface is installed on the side of the upper shell 2. The problem of inconsistent fragrance concentration when ordinary fragrances evaporate at room temperature can be solved by evaporating the fragrance at heating temperature.

[0080] Example 4

[0081] This embodiment is a variation of embodiment 3, such as... Figure 9 As shown, by setting an atomizing plate 17 at the bottom of the air duct 6 and connecting the atomizing plate 17 to the circuit board 11 for driving, the fragrance 1 is atomized. By adding the atomizing plate 17, the problem of inconsistent fragrance concentration when ordinary fragrances evaporate at room temperature can be solved.

[0082] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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, they should not be construed as limitations on this application.

[0083] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A car-mounted fragrance diffuser based on a vehicle-mounted air supply system, characterized in that, Includes a top cover (2), a bottom cover (14), an air duct shell, a mixing chamber (12), and a fragrance (1); The upper cover (2) covers the bottom cover (14) and forms a shell. The air duct shell and the mixing chamber (12) are installed inside the shell from top to bottom. The mixing chamber (12) and the bottom cover (14) form mutually separated air passage inlet and air passage outlet. The air duct housing is provided with an air duct (6), the fragrance (1) is installed inside the air duct (6), the air inlet chamber (602) of the air duct (6) is connected to the air passage inlet mouth, and the air outlet chamber (601) of the air duct (6) is connected to the air passage outlet mouth. An air inlet pipe (15) and an air outlet pipe (16) are installed on the bottom cover (14). The two ends of the air inlet pipe (15) are respectively connected to the air passage inlet cavity and the external air supply system, and the air outlet pipe (16) is connected to the air passage outlet cavity. Air passes through the air inlet pipe (15), the air passage into the oral cavity and the air inlet chamber (602) in sequence and then reaches the interior of the air duct (6). The fragrance (1) evaporates under the action of air. The evaporated fragrance (1) mixes with the air and passes through the air outlet chamber (601), the air passage into the oral cavity and the air outlet pipe (16) in sequence to reach the outside.

2. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 1, characterized in that, The mixing chamber (12) includes a top plate and an air passage baffle (123) installed at the bottom of the top plate; The air passage partition (123) is cylindrical, dividing the space between the top plate and the bottom cover (14) into an internal air passage inlet and an external air passage outlet. The air inlet pipe (15) is installed in the middle of the bottom end of the bottom cover (14) and communicates with the air passage inlet. The air outlet cavity (601) is installed on the side of the bottom cover (14) and communicates with the air passage outlet. The top plate is provided with an air inlet (121) and an air outlet (122). The air inlet (121) and the air outlet (122) are located inside and outside the air partition (123) respectively, and are connected to the air inlet cavity (602) and the air outlet cavity (601) respectively.

3. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 2, characterized in that, The air duct housing includes an upper air duct cover (5), a lower air duct cover (7), and multiple air ducts (6); Multiple air ducts (6) are used to install the same or different kinds of fragrances (1), and multiple air ducts (6) are installed circumferentially between the upper cover (5) and the lower cover (7) of the air duct.

4. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 2, characterized in that, The gas passage partition (123) is provided with a motor mounting part (124), and a motor (10) is installed in the motor mounting part (124); The output shaft of the motor (10) passes through the top plate and is connected to a baffle (9). The baffle (9) includes blades corresponding to the air inlet (121) and air outlet (122) for closing or opening the air inlet (121) and air outlet (122) by rotation.

5. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 4, characterized in that, A protective cover (8) is provided between the air duct shell and the mixing chamber (12), and the protective cover (8) is provided with a baffle mounting groove (801) corresponding to the baffle (9); The baffle (9) is rotatably installed in the baffle mounting groove (801), and the bottom of the baffle mounting groove (801) is provided with through holes corresponding to the air inlet (121) and the air outlet (122); In the closed state, the baffle (9) rotates to abut against the first side wall of the baffle mounting groove (801), and the blade covers the air passage inlet (121) and the air passage outlet (122); In the open state, the baffle (9) rotates to abut against the second side wall of the baffle mounting groove (801), and the blade does not cover the air passage inlet (121) and air passage outlet (122).

6. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 1, characterized in that, A heating module (107) is provided at the bottom of the air duct (6) for heating the fragrance (1), or an atomizing plate (17) is provided at the bottom of the air duct (6) for atomizing the fragrance (1); The air duct housing is provided with a circuit board (11), which is electrically connected to the heating module (107) or the atomizing plate (17).

7. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 1, characterized in that, It also includes a mixing cover (13), which is installed outside the mixing chamber (12), which is fitted into the bottom cover (14) by the mixing cover (13).

8. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 1, characterized in that, The air duct (6) includes an air duct body, an air inlet chamber (602), and an air outlet chamber (601); The air duct body has a hollow structure and serves as a fragrance installation part for installing fragrance (1). The air inlet cavity (602) is located on one side of the air duct body and is connected to the bottom of one side of the air duct body. The air outlet cavity (601) is located on the other side of the air duct body and is separated from the air duct body by a partition. The top of the partition has an opening. After passing through the air inlet cavity (602), the air enters from the bottom of one side of the air duct body and exits from the top of the other side of the air duct body.

9. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 2, characterized in that, The air duct housing is provided with an air duct mounting position, and the air duct (6) is installed in the air duct mounting position; A magnet (3) is provided on the top of the air duct housing. The magnet (3) is installed outside the air duct mounting position and is used to magnetically fix the fragrance (1) located inside the air duct (6).

10. The in-vehicle fragrance diffuser based on an in-vehicle air supply system according to claim 1, characterized in that, A sealing ring (4) is provided between the top of the air duct housing and the top cover (2).

Citation Information

Patent Citations

  • On -vehicle fragrant atmosphere machine

    CN205905717U