Fan with aromatherapy function

Abstract

The application discloses a fan with aromatherapy function, which comprises a shell, fan blades, a motor and a front cover. The shell is provided with an air inlet on one side. The front cover is detachably arranged on one side of the shell and is provided with an air outlet. The motor and the fan blades are arranged in a space enclosed by the shell and the front cover. The fan blades are arranged on the driving shaft of the motor through a first rotating shaft and can be driven to rotate by the motor. The front cover is characterized in that a placing cavity is concave in the center of the front side of the front cover. A plurality of first through holes are arranged at intervals on the circumferential side of the placing cavity. A placing box capable of moving back and forth relative to the placing cavity is arranged in the placing cavity. Aromatherapy slices are placed in the placing box. A plurality of second through holes are arranged on the placing box. The shell is provided with a transmission member capable of driving the placing box to move back and forth along with the rotation of the fan blades.

Description

Technical Field

[0001] This invention specifically relates to a fan with aromatherapy function. Background Technology

[0002] Fans, as everyday cooling and ventilation devices, are widely used in indoor environments such as homes and offices. To improve the user experience, existing technologies have introduced fans with integrated aromatherapy functions. Their conventional structure involves fixing an aromatherapy box to the fan's air inlet, air outlet, or side of the casing. The aromatherapy box contains aromatherapy tablets, and the airflow generated by the fan's rotation disperses the aromatherapy volatiles into the air.

[0003] However, the aforementioned existing technologies have the following core drawbacks: poor and uneven aroma diffusion: the aroma diffuser box has a fixed structure, and the aroma diffuser tablets can only passively receive airflow. The volatiles concentrate in the area near the air outlet, and the fragrance concentration drops sharply in areas far from the fan, making it impossible to achieve uniform fragrance diffusion in the room. Furthermore, the aroma diffusion can only be indirectly affected by adjusting the fan speed, and the fragrance concentration cannot be independently controlled. This fails to meet users' needs when they require low fan speed and high fragrance concentration or high fan speed and low fragrance concentration. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide a fan with aromatherapy function.

[0005] A fan with aromatherapy function includes a housing, fan blades, a motor, and a front cover. The housing has an air inlet on one side, and the front cover is detachably mounted on one side of the housing and has an air outlet thereon. The motor and fan blades are disposed within the space enclosed by the housing and the front cover, and the fan blades are mounted on the drive shaft of the motor via a first rotating shaft and can be driven to rotate by the motor. The fan is characterized in that: a placement cavity is recessed at the center of the front side of the front cover, and a plurality of first perforations are provided through the periphery of the placement cavity. A placement box that can move back and forth relative to the placement cavity is provided in the placement cavity. An aromatherapy tablet is placed in the placement box, and a plurality of second perforations are provided through the placement box. The housing has a transmission component that can drive the placement box to move back and forth as the fan blades rotate.

[0006] In one embodiment, the transmission component includes a first synchronous pulley, a second synchronous pulley, a gear, and an internal gear ring. The first synchronous pulley is co-centered on a first rotating shaft, and the second synchronous pulley is rotatably mounted inside the housing via a second rotating shaft. The first and second synchronous pulleys are connected by a synchronous belt drive. The gear is co-centered on the second rotating shaft. The internal gear ring is rotatably mounted inside the housing via a bearing and meshes with the gear. The fan blade is located on the inner ring of the internal gear ring. The internal gear ring has a flange along its circumference. The flange facing the front cover has a gradually transitioning concave arc-shaped recess, which forms a driving surface with varying heights. A guide rod is provided on one side of the placement box. The guide rod is movably inserted into the placement cavity, and one end of the guide rod extends through the front cover into the housing and is provided with a connecting plate. The connecting plate has a push rod that can abut against the driving surface. A first spring is sleeved on the guide rod between the front cover and the connecting plate.

[0007] In one embodiment, the transmission component further includes a second spring, a sliding seat, and an insert. The push rod is movably inserted into the connecting plate. A limiting block is provided on the push rod near the flange side. The second spring is sleeved on the push rod and abuts against the limiting block and the connecting plate. The sliding seat is slidably disposed on one side of the housing. The insert is movably inserted into the sliding seat and can slide with the sliding seat. A knob is threadedly inserted into one side of the sliding seat. One end of the knob is located outside the housing, and the other end of the knob abuts against the insert. The knob is displaced relative to the threaded displacement of the sliding seat to abut against the insert, which is then displaced between the limiting block and the connecting plate.

[0008] In one embodiment, a first cover plate is provided at the center of the front side of the front cover by means of a threaded engagement, and the first cover plate can be displaced along the thread and cover and close the first perforation.

[0009] In one embodiment, the placement box includes a box body and a cover plate that is detachably snapped onto the box body.

[0010] The box body is fixedly connected to the guide rod, and the aromatherapy tablet is placed between the box body and the cover plate.

[0011] In one embodiment, a sealing ring is abutted between the box body and the placement cavity, and the sealing ring enables piston displacement of the box body relative to the placement cavity.

[0012] In one embodiment, the end of the push rod facing the flange is rotatably connected to a wear-resistant roller via a pin, and the circumferential surface of the wear-resistant roller rolls against the driving surface on the flange.

[0013] In summary, the advantages of this invention over the prior art are:

[0014] This invention directly transmits the power of the fan motor to the placement box via a transmission component, causing the placement box to move back and forth synchronously with the fan blades. When the placement box extends, it is close to the air outlet, and the fragrance is directly carried out by the airflow; when it retracts, it moves away from the air outlet, and the airflow in the placement chamber carries away the fragrance. This dynamic movement breaks the concentration gradient of fixed aromatherapy, achieving 360° uniform fragrance diffusion in the room and effectively expanding the fragrance coverage area.

[0015] Furthermore, the reciprocating motion of the placement box creates forced convection of air around the aromatherapy tablets, increasing the frequency of contact between the aromatherapy tablets and fresh air, significantly improving the evaporation rate of the aromatherapy, and increasing the utilization rate of the aromatherapy tablets. Attached Figure Description

[0016] Figure 1 This is one of the cross-sectional views of a fan with aromatherapy function in one embodiment of the present invention;

[0017] Figure 2 This is a second cross-sectional view of a fan with aromatherapy function in one embodiment of the present invention;

[0018] Figure 3 As one embodiment of the present invention Figure 2 Enlarged view of point A;

[0019] Figure 4 This is a perspective view of a fan with aromatherapy function according to one embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0021] like Figures 1 to 4 The present invention preferably provides a fan with aromatherapy function, including a housing 1, fan blades 2, a motor 3 and a front cover 4. The housing 1 has an air inlet on one side, and the front cover 4 is detachably disposed on one side of the housing 1 and has an air outlet thereon. The motor 3 and the fan blades 2 are disposed in the space enclosed by the housing 1 and the front cover 4, and the fan blades 2 are disposed on the drive shaft of the motor 3 via a first rotating shaft and can be driven to rotate by the motor 3. The front center of the front cover 4 has a recessed placement cavity 5, and a plurality of first perforations 6 are provided through the periphery of the placement cavity 5 at intervals. The placement cavity 5 has a placement box 7 that can move back and forth relative to it, and the placement box 7 contains aromatherapy tablets. A plurality of second perforations 8 are provided through the placement box 7. The housing 1 has a transmission member 9 that can drive the placement box 7 to move back and forth as the fan blades 2 rotate.

[0022] Specifically, after the motor is powered on, it drives the first shaft to rotate, which in turn drives the fan blades to rotate, generating airflow from the air inlet to the air outlet, thus achieving the basic ventilation and cooling function of the fan. Simultaneously, the power output from the motor is transmitted to the aromatherapy box via a transmission component, causing the box to move continuously back and forth within the storage cavity. The aromatherapy tablet inside the box continuously releases fragrance. When the box extends forward, the alignment between the second and first perforations improves, and the aromatherapy tablet is closer to the air outlet, allowing the airflow to directly pass through the tablet and carry the fragrance out. When the box retracts backward, the air inside the storage cavity is compressed, and the fragrance is accelerated out through the first perforation. Through the dynamic movement of the box, the active and uniform diffusion of the aromatherapy is achieved.

[0023] Further, the transmission component 9 includes a first synchronous pulley 10, a second synchronous pulley 11, a gear 12, and an internal gear ring 13. The first synchronous pulley 10 is co-centered on a first rotating shaft, and the second synchronous pulley 11 is rotatably mounted inside the housing 1 via a second rotating shaft. The first synchronous pulley 10 and the second synchronous pulley 11 are connected by a synchronous belt drive. The gear 12 is co-centered on the second rotating shaft, and the internal gear ring 13 is rotatably mounted inside the housing 1 via a bearing and meshes with the gear 12. The fan blade 2 is located within the internal gear ring 13. At the inner ring, the inner toothed ring 13 has a flange 14 along its circumference. The flange 14 has a gradually transitioning arc-shaped recess 15 on the side facing the front cover 4. The arc-shaped recess 15 forms a driving surface with varying heights. The placement box 7 has a guide rod 16 on one side. The guide rod 16 is movably inserted into the placement cavity 5. One end of the guide rod 16 passes through the front cover 4 and extends into the housing 1, where a connecting plate 17 is provided. The connecting plate 17 has a top rod 18 that can abut against the driving surface. A first spring 19 is sleeved on the guide rod 16 between the front cover 4 and the connecting plate 17.

[0024] Specifically, when the first rotating shaft rotates with the motor, the first synchronous pulley fixed on it rotates synchronously, driving the second synchronous pulley to rotate via the synchronous belt. The second synchronous pulley drives the gear to rotate via the second rotating shaft. The gear meshes with the internal teeth of the internal gear ring, causing the internal teeth to rotate around its own axis. The arc-shaped concave portion on the flange of the internal gear ring forms a continuously undulating driving surface. Under the elastic force of the first spring, the end of the push rod always remains in contact with the driving surface. When the internal gear ring rotates, the change in the height of the driving surface pushes the push rod to reciprocate back and forth along the axial direction. The push rod drives the guide rod to move synchronously through the connecting plate. The guide rod ultimately drives the placement box fixedly connected to it to reciprocate back and forth within the placement cavity.

[0025] Furthermore, the transmission component 9 also includes a second spring 20, a sliding seat 21, and an insert 22. The push rod 18 is movably inserted into the connecting plate 17. A limiting block 23 is provided on the push rod 18 near the flange 14. The second spring 20 is sleeved on the push rod 18 and abuts against the limiting block 23 and the connecting plate 17. The sliding seat 21 is slidably disposed on one side of the housing 1. The insert 22 is movably inserted into the sliding seat 21 and can slide with the sliding seat 21. A knob 24 is threadedly inserted into one side of the sliding seat 21. One end of the knob 24 is located outside the housing 1, and the other end of the knob 24 abuts against the insert 22. The knob 24 is threadedly displaced relative to the sliding seat 21 to abut against the insert 22 and displace it between the limiting block 23 and the connecting plate 17.

[0026] Specifically, when the knob is fully turned out and the insert is completely out of the gap between the limiting block and the connecting plate, the connecting plate remains at its foremost position under the action of the first spring because the elastic force of the first spring is greater than that of the second spring. At this time, there is a free play gap between the push rod and the connecting plate, allowing the push rod to move freely back and forth relative to the connecting plate. When the internal gear ring rotates, the driving surface pushes the push rod backward, and the push rod only compresses the second spring, without causing any displacement of the connecting plate and the placement box.

[0027] When the knob is rotated clockwise, the knob, through its threaded engagement, pushes the insert into the gap between the limiting block and the connecting plate. Once the insert is inserted into the gap, it gradually fills the gap between the push rod and the connecting plate, creating a rigid transmission connection between them. At this time, when the internal gear ring rotates, the force pushing the push rod backward from the driving surface is directly transmitted to the connecting plate through the insert, thereby causing the guide rod and the placement box to move backward against the force of the first spring. When the height of the driving surface decreases, the force of the first spring pushes the connecting plate, insert, limiting block, and push rod forward together, thus achieving the reciprocating movement of the placement box.

[0028] In summary, it can accelerate the evaporation of aromatherapy, enabling both natural evaporation and accelerated evaporation, and offers a two-stage function selection.

[0029] Furthermore, a first cover plate 25 is provided at the center of the front side of the front cover 4 through a threaded connection. The first cover plate 25 can move along the thread and cover and close the first through hole 6.

[0030] Specifically, the first cover is threaded to the center of the front cover. When the aromatherapy function is not needed, rotating the first cover clockwise moves it along the threads towards the front cover, gradually covering all the first perforations around the placement cavity, blocking the channel for fragrance diffusion and preventing external dust from entering the placement cavity and the inside of the placement box. When the aromatherapy function needs to be restored, rotating the first cover counterclockwise fully exposes the first perforations, allowing the fragrance to diffuse normally.

[0031] Furthermore, the placement box 7 includes a box body 26 and a second cover plate 27 that is detachably snapped onto the box body 26. The box body 26 is fixedly connected to the guide rod 16, and the aromatherapy tablet is placed between the box body 26 and the second cover plate 27.

[0032] Specifically, the diffuser box consists of a box body and a lid, which are detachably connected by a snap-fit ​​mechanism. When replacing the diffuser tablet, pull the box forward to its maximum extension, pry open the latch between the lid and the box body with your fingers, remove the lid, take out the old diffuser tablet, insert the new one, and then snap the lid back onto the box body to complete the replacement. The box body is fixedly connected to the guide rod, ensuring that the diffuser box moves synchronously with the guide rod.

[0033] Furthermore, a sealing ring is abutted between the box body 26 and the placement cavity 5, and the sealing ring enables the piston displacement of the box body 26 relative to the placement cavity 5.

[0034] Specifically, the sealing ring is fitted onto the outer wall of the box and fits tightly against the inner wall of the placement cavity, creating a sealed piston structure between the box and the cavity. When the box extends forward, the volume inside the cavity increases, creating negative pressure, drawing outside air into the cavity through the first perforation and carrying away volatiles through the aromatherapy tablets. When the box retracts backward, the volume inside the cavity decreases, creating positive pressure, which rapidly forces the scented air out through the first perforation into the external environment. This piston-like suction and expulsion action significantly enhances airflow within the cavity, further improving the evaporation and diffusion effects of the aromatherapy.

[0035] Furthermore, one end of the push rod 18 facing the flange 14 is rotatably connected to a wear-resistant roller via a pin, and the circumferential surface of the wear-resistant roller rolls against the driving surface on the flange 14.

[0036] Specifically, when the internal gear ring rotates, the undulating driving surface on the flange pushes the push rod in a reciprocating motion. Because a freely rotatable wear-resistant roller is mounted on the end of the push rod via a pin, the contact between the driving surface and the push rod is no longer direct sliding contact, but rather rolling contact through the circumferential surface of the wear-resistant roller. When the height of the driving surface changes, the wear-resistant roller rotates synchronously around the pin, converting the original sliding friction into rolling friction. This greatly reduces transmission resistance, making the push rod's movement smoother and more stable, while avoiding the harsh noise generated by sliding friction. Furthermore, the rolling contact significantly reduces the wear rate of the driving surface and the end of the push rod, effectively extending the service life of the transmission system.

[0037] In another embodiment, a primary reduction gearbox is provided between the second rotating shaft and the gear. The reduction gearbox includes a gearbox housing, an input shaft, an output shaft, a driving gear, and a driven gear. The gearbox housing is fixedly mounted inside the housing with screws. The input shaft is rotatably mounted inside the gearbox housing via bearings, with one end extending out of the gearbox housing and fixedly connected to the front end of the second rotating shaft via a coupling. The output shaft is rotatably mounted inside the gearbox housing via bearings, arranged parallel to the input shaft, with one end extending out of the gearbox housing and fixedly connected to the gear via a key. The driving gear is fixedly mounted on the input shaft via a key, and the driven gear is fixedly mounted on the output shaft via a key, with the driving gear meshing with the driven gear.

[0038] In this embodiment, the driving gear has 12 teeth, the driven gear has 60 teeth, and the reduction ratio is 5:1. That is, for every 5 rotations of the second rotating shaft, the output shaft drives the gear to rotate 1 rotation, thereby reducing the rotational speed of the internal gear ring to 1 / 5 of its original speed, and reducing the reciprocating frequency of the placement box from about 5 times / second to about 1 time / second, which is within the range of human sensory comfort.

[0039] The gearbox housing is filled with lithium-based grease to lubricate the gear meshing surfaces and bearings, reducing operating noise and wear.

[0040] Working principle of the reduction gearbox: The first shaft drives the first synchronous pulley to rotate, which in turn drives the second synchronous pulley and the second shaft to rotate via the synchronous belt. The second shaft drives the input shaft and the driving gear of the reduction gearbox to rotate. The driving gear meshes with the driven gear, driving the driven gear and the output shaft to rotate at a lower speed. The output shaft ultimately drives the gear to rotate, which in turn drives the internal gear ring and the housing to reciprocate back and forth.

[0041] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fan with aromatherapy function, comprising a housing (1), fan blades (2), a motor (3), and a front cover (4), wherein the housing (1) has an air inlet on one side, the front cover (4) is detachably disposed on one side of the housing (1) and has an air outlet thereon, the motor (3) and fan blades (2) are disposed within the space enclosed by the housing (1) and the front cover (4), and the fan blades (2) are disposed on the drive shaft of the motor (3) via a first rotating shaft and can be driven to rotate by the motor (3), characterized in that: The front cover (4) has a recessed placement cavity (5) at the center of the front side. The placement cavity (5) has several first perforations (6) spaced through it. The placement cavity (5) has a placement box (7) that can move back and forth relative to it. The placement box (7) contains aromatherapy tablets. Several second perforations (8) are opened through the placement box (7). The housing (1) has a transmission component (9) that can drive the placement box (7) to move back and forth as the fan blade (2) rotates.

2. The fan with aromatherapy function according to claim 1, characterized in that: The transmission component (9) includes a first synchronous pulley (10), a second synchronous pulley (11), a gear (12), and an internal gear ring (13). The first synchronous pulley (10) is co-centered on a first rotating shaft, and the second synchronous pulley (11) is rotatably mounted inside the housing (1) via a second rotating shaft. The first synchronous pulley (10) and the second synchronous pulley (11) are connected by a synchronous belt drive. The gear (12) is co-centered on a second rotating shaft. The internal gear ring (13) is rotatably mounted inside the housing (1) via a bearing and meshes with the gear (12). The fan blade (2) is located at the inner ring of the internal gear ring (13). The inner toothed ring (13) has a flange (14) along its circumference. The flange (14) facing the front cover (4) has a gradually transitioning arc-shaped recess (15) to form a driving surface with varying heights. The placement box (7) has a guide rod (16) on one side. The guide rod (16) is movably inserted into the placement cavity (5). One end of the guide rod (16) extends through the front cover (4) into the housing (1) and is provided with a connecting plate (17). The connecting plate (17) is provided with a top rod (18) that can abut against the driving surface. A first spring (19) is sleeved on the guide rod (16) between the front cover (4) and the connecting plate (17).

3. A fan with aromatherapy function according to claim 2, characterized in that: The transmission component (9) further includes a second spring (20), a sliding seat (21), and an insert (22). The push rod (18) is movably inserted into the connecting plate (17). A limiting block (23) is provided on the push rod (18) on the side adjacent to the flange (14). The second spring (20) is sleeved on the push rod (18) and abuts against the limiting block (23) and the connecting plate (17). The sliding seat (21) is slidably disposed on the housing (1) in a back-and-forth manner. On one side, the insert (22) is movably inserted into the sliding seat (21) and can slide with the sliding seat (21). A knob (24) is threadedly inserted into one side of the sliding seat (21). One end of the knob (24) is located outside the housing (1), and the other end of the knob (24) abuts against the insert (22). The knob (24) is threadedly displaced relative to the sliding seat (21) to abut against the insert (22) and displace it between the limiting block (23) and the connecting plate (17).

4. A fan with aromatherapy function according to claim 1, characterized in that: The front cover (4) has a first cover plate (25) at the center of the front side through a threaded connection. The first cover plate (25) can move along the thread and cover and close the first through hole (6).

5. A fan with aromatherapy function according to claim 1, characterized in that: The placement box (7) includes a box body (26) and a second cover plate (27) that is detachably snapped onto the box body (26). The box body (26) is fixedly connected to the guide rod (16), and the aromatherapy tablet is placed between the box body (26) and the second cover plate (27).

6. A fan with aromatherapy function according to claim 5, characterized in that: A sealing ring is abutted between the box body (26) and the placement cavity (5), and the sealing ring is used to realize the piston displacement of the box body (26) relative to the placement cavity (5).

7. A fan with aromatherapy function according to claim 2, characterized in that: The top rod (18) facing the flange (14) is rotatably connected to a wear-resistant roller by a pin, and the circumferential surface of the wear-resistant roller rolls against the driving surface on the flange (14).

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