Fan device

Abstract

The invention relates to the technical field of fans, and discloses a fan device which comprises a shell assembly, a first air conveying assembly, a second air conveying assembly and a control module. The first driving motor is mounted on the mounting bracket; the first wind wheel is mounted on an output shaft of the first driving motor; the second driving motor is mounted on the mounting bracket, and an output shaft of the second driving motor and an output shaft of the first driving motor are coaxially arranged; the second wind wheel is mounted on an output shaft of the second driving motor; the heating body is installed on the installation support and located in an airflow channel generated by the second wind wheel. The control module is in communication connection with the first driving motor and the second driving motor, the control module is in communication connection with the two driving motors at the same time, the operation states of the first air conveying assembly and the second air conveying assembly can be independently regulated and controlled, conventional air supply and hot air output are achieved, and cold and warm air mixed air supply is achieved through synchronous operation; alternate start and stop form a cold-warm alternate wind feeling, and multifunctional air supply selection is achieved.

Description

Technical Field

[0001] This invention relates to the field of fan technology, and more specifically to fan devices. Background Technology

[0002] As users' demands for indoor air conditioning comfort continue to rise, fan products have gradually evolved from simply providing basic airflow to becoming more diverse and intelligent. Traditional fans mostly use a single motor driving a single blade, adjusting the airflow and direction by changing the motor speed or using an oscillation mechanism. To meet winter heating needs, some products have added heating elements such as heating wires within the air duct, using the same blade to draw in ambient air, heat it, and then deliver warm air. However, this setup not only fails to independently control the airflow of cool and warm air, but also struggles to achieve complex airflow modes such as simultaneous mixing or alternating delivery of cool and warm air. Its overall functionality is relatively limited, making it difficult to meet users' higher demands for comfortable airflow experiences in different seasons or diverse usage scenarios. Summary of the Invention

[0003] In view of this, the present invention provides a fan device to solve the problem that current transmission fans not only cannot independently control the airflow of cold air and warm air, but also have difficulty in achieving complex air delivery modes such as simultaneous mixing or alternating delivery of cold and warm air. Their overall functions are relatively limited and they are difficult to meet the higher requirements of users for a comfortable air delivery experience in different seasons or diverse usage scenarios.

[0004] This invention provides a fan device, comprising: The housing assembly has an internal mounting bracket; The first air supply assembly includes a first drive motor and a first impeller; the first drive motor is mounted on a mounting bracket; the first impeller is mounted on the output shaft of the first drive motor; The second air supply assembly includes a second drive motor, a second impeller, and a heating element. The second drive motor is mounted on a mounting bracket, and the output shaft of the second drive motor is coaxially arranged with the output shaft of the first drive motor. The second impeller is mounted on the output shaft of the second drive motor. The heating element is mounted on the mounting bracket and located in the airflow channel generated by the second impeller. The control module is communicatively connected to both the first drive motor and the second drive motor.

[0005] Beneficial effects: The housing assembly and mounting brackets provide a stable installation foundation for each component. The first and second air supply components are arranged with their output shafts coaxially, ensuring structural compactness, saving installation space, and allowing for smoother airflow. Simultaneously, the control module communicates with the two drive motors, allowing independent control of the operating status of the first and second air supply components. The first air supply component can be controlled independently for regular air delivery, while the second air supply component can be controlled independently to output hot air in conjunction with the heating element. Simultaneous operation can achieve mixed hot and cold air delivery, or alternating start / stop can create alternating hot and cold air sensations. The combination of these two components provides the equipment with multiple air delivery levels and functions to meet the needs of different scenarios. The flexible and convenient adjustment method enhances the diversity of air delivery modes and user comfort, meeting the needs of different seasons and scenarios.

[0006] In one alternative implementation, the second wind turbine includes: A support frame is installed on the output shaft of the second drive motor; and an airflow channel is provided inside the support frame. Multiple fan blades are arranged around the outer periphery of the support frame; The outer diameter of the first impeller is less than or equal to the diameter of the airflow channel; the heating element and the fan blades are axially aligned.

[0007] Beneficial effects: By setting a through airflow channel in the axial center region of the second impeller's support frame, and ensuring that the outer diameter of the first impeller is less than or equal to the diameter of this airflow channel, the cold airflow generated by the first impeller can directly pass through the airflow channel within the second impeller axially. Meanwhile, the multiple blades of the second impeller are distributed around the outer perimeter of the support frame, driving the airflow through its outer flow channels to achieve efficient heat exchange with the corresponding heating elements. Therefore, cold and warm air flow independently in two physically isolated paths—the central channel and the outer flow channels—effectively avoiding the common problem of airflow obstruction or interference in coaxial dual-impeller structures. This spatial separation design not only ensures that cold air is not heated and warm air is not cooled, improving the purity and temperature stability of the delivered air, but also eliminates the complex duct switching mechanism of traditional structures, making the airflow path shorter and more direct, thereby reducing flow resistance and energy loss, and improving the overall energy efficiency of the unit. Meanwhile, the hot and cold airflows remain separate before being output, and can be delivered independently, mixed synchronously, or alternately as needed. This ensures both the uniformity and comfort of the air supply temperature, and achieves efficient integration and compact layout of the dual-duct system.

[0008] In one alternative embodiment, the support frame includes: The first annular structure is fixedly connected to the output shaft of the second drive motor; The second annular structure is coaxial with and spaced apart from the first annular structure, and forms an airflow channel between them; the outer diameter of the first impeller is less than or equal to the inner diameter of the second annular structure, and multiple fan blades are arranged around the outer periphery of the second annular structure; Multiple first support arms are arranged around the outer periphery of the first annular structure; and the first support arms extend radially, with one end connected to the first annular structure and the other end connected to the second annular structure, and a flow gap is provided between adjacent first support arms.

[0009] Beneficial effects: The support frame, through the first and second ring structures arranged coaxially and spaced apart, combined with multiple first support arms extending radially, forms a stable overall frame. This not only synchronously transmits the power from the output shaft of the second drive motor to the fan blades, preventing swaying or eccentricity during operation and ensuring the stability and consistency of the fan blade rotation, but also allows the airflow driven by the first impeller to flow out smoothly without obstructing the airflow channel, thanks to the flow gap between the support arms.

[0010] In one alternative embodiment, the housing assembly includes a duct housing, which includes a first section and a second section arranged sequentially along the axial direction; a first air supply assembly is located in the first section, and a second air supply assembly is located in the second section.

[0011] Beneficial effects: By dividing the duct housing into a first section and a second section along the axial direction, and arranging the first and second air delivery components accordingly, an orderly zoning layout of the dual-duct system is achieved. Simultaneously, the zoning layout ensures that the airflow channels of the two air delivery components are independent yet axially connected. The conventional airflow of the first air delivery component and the hot airflow formed by the heating element in the second air delivery component can flow smoothly without interfering with each other, effectively guaranteeing air delivery efficiency and heating effect. Furthermore, the clear zoning makes the assembly and positioning of the two air delivery components clearer, reducing the difficulty of alignment during production assembly. It also allows for quick location of components according to the corresponding sections during later maintenance. Combined with the overall housing structure, this improves the rationality of the equipment structure and the convenience of use and maintenance.

[0012] In one alternative embodiment, the mounting bracket further includes a first bracket, which is mounted on a first section of the duct housing, and the first drive motor is fixed to the first bracket.

[0013] Beneficial effects: By setting a first bracket in the first section of the duct housing and firmly fixing the first drive motor to the bracket, modular installation and precise positioning of the first air delivery component are achieved. This not only effectively improves the stability of the first drive motor during operation and reduces noise and component loosening risks caused by vibration, but also facilitates assembly and subsequent maintenance. Simultaneously, the first bracket, as a transitional connector between the first drive motor and the duct housing, can be flexibly designed in shape and installation position according to the spatial layout, balancing structural strength and internal space utilization, ensuring reliable operation of the first air delivery component within the limited duct space.

[0014] In one alternative embodiment, the mounting bracket further includes a second bracket, which is installed in the second section of the air duct housing, and the second drive motor and the heating element are both fixed to the second bracket.

[0015] Beneficial effects: By setting a second bracket in the second section of the air duct housing and fixing the second drive motor and heating element together on the second bracket, modular integrated installation of the core heating components is achieved. This not only ensures the relative positional stability between the second drive motor and the heating element, avoiding displacement or poor contact caused by vibration or thermal expansion, but also simplifies the assembly process of the second drive motor and the heating element, reducing the difficulty of production assembly. During later maintenance, components can be quickly inspected or replaced by disassembling and assembling the second bracket. Combined with the partitioned design of the overall structure, this approach balances the stability of equipment operation, the rationality of the structural layout, and the convenience of maintenance.

[0016] In one alternative implementation, the second support includes: The third ring structure, the second drive motor is installed on the third ring structure; The fourth ring structure is coaxial with and spaced apart from the third ring structure, and forms a flow channel with the third ring structure; the flow channel is axially aligned with and connected to the airflow channel; the outer diameter of the first impeller is less than or equal to the inner diameter of the fourth ring structure; and the heating element is sleeved on the outer periphery of the fourth ring structure. Multiple second support arms are arranged around the outer periphery of the third annular structure; and the second support arms extend radially, with one end connected to the third annular structure and the other end connected to the fourth annular structure, and a flow gap is provided between adjacent second support arms.

[0017] Beneficial effects: The second bracket, through the coaxially spaced third and fourth ring structures, combined with multiple radially extending second support arms, forms a rigid and stable frame. This not only enables the installation and positioning of the second drive motor and the heating element, ensuring a stable installation of the second drive motor and the heating element and preventing displacement or shaking during operation, but also allows for a more regular assembly of the heating element through the fourth ring structure, conforming to the correspondence with the fan blades of the second impeller. At the same time, the flow channel between the third and fourth ring structures is axially aligned and connected with the airflow channel of the second impeller, and the reserved flow gap between adjacent second support arms does not obstruct the airflow path, allowing the airflow driven by the first impeller to flow out smoothly.

[0018] In one alternative embodiment, the second support further includes a plurality of third support arms, which are distributed sequentially at intervals around the outer periphery of the fourth annular structure, and the third support arms are disposed on the side of the heating element away from the second impeller.

[0019] Beneficial effects: Multiple third support arms surround the outer periphery of the fourth annular structure and are spaced apart. They are located on the side of the heating element away from the second impeller, which can further strengthen the overall rigidity of the fourth annular structure and provide lateral support and restraint for the heating element fitted around it. This prevents the heating element from deforming or shifting due to long-term heating or airflow impact, and ensures the relative positional accuracy of the heating element and the airflow channel. At the same time, the spaced distribution design of the third support arms does not obstruct the hot air output path and will not affect the smooth diffusion of the airflow after being heated by the heating element. It can also help guide the airflow to be output evenly, improving the user experience.

[0020] In one alternative embodiment, the housing assembly further includes an annular grille disposed on the side of the heating element away from the second impeller, axially aligned with the position of the heating element, and fixed to the air duct housing.

[0021] Beneficial effects: By setting an annular grille on the side of the heating element away from the second impeller, that is, placing the annular grille on the air outlet side of the heating element and fixing the annular grille to the air duct shell, a safety barrier is formed, which can prevent users from directly touching the high-temperature heating element and causing burns. At the same time, it can prevent foreign objects from entering the airflow channel and damaging internal components, thus improving the safety of equipment use. Furthermore, the annular grille is axially aligned with the heating element and matched with the warm air duct. This can guide the airflow heated by the heating element to be output evenly and stably, avoiding airflow turbulence that affects heating efficiency and user experience, while not significantly obstructing the exhaust of warm airflow and ensuring air delivery efficiency.

[0022] In one alternative embodiment, the housing assembly further includes a first mesh cover located on the side of the second air supply assembly opposite to the first air supply assembly, axially aligned with the position of the airflow channel, and fixed to the inner periphery of the annular grille.

[0023] Beneficial effects: By installing a first mesh cover on the side of the second air delivery assembly away from the first air delivery assembly and fixing it to the inner periphery of the annular grille, and aligning it axially with the airflow channel of the second impeller, the first mesh cover covers the cold air outlet area generated by the first impeller and passing through the airflow channel of the support frame. This not only effectively prevents users from contacting the internal rotating parts and avoids foreign objects entering the air duct, improving safety, but also straightens and guides the cold airflow, reducing airflow turbulence and eddy loss, making the airflow more stable and concentrated. Simultaneously, the first mesh cover is embedded inside the annular grille, making full use of radial space and avoiding additional product volume, thus improving the compactness and overall appearance of the machine while ensuring functionality.

[0024] In one alternative embodiment, the housing assembly further includes a second mesh cover, which is fixed to the duct housing and located on the side of the first air supply assembly opposite to the second air supply assembly.

[0025] Beneficial effects: The second mesh cover is fixed to the duct housing and located on the side of the first air supply component away from the second air supply component. Together with the annular grille and the first mesh cover, it forms omnidirectional protection, effectively preventing foreign objects from entering the duct from the input end, avoiding damage to core components such as the first drive motor and the first impeller. It also prevents users from touching rotating parts at the input end, enhancing safety. Furthermore, because the second mesh cover is installed in the airflow input path of the first air supply component, it helps guide the airflow smoothly into the duct housing, reducing turbulence and wind noise, and improving air delivery efficiency and comfort. Simultaneously, directly fixing the second mesh cover to the duct housing results in a stable structure and simple assembly, requiring no additional support components. This ensures a clean appearance while enhancing the overall reliability and ease of maintenance.

[0026] In one alternative implementation, the outer wall of the first section is provided with a mounting groove, and the control module is mounted in the mounting groove.

[0027] Beneficial Effects: By setting a mounting groove on the outer wall of the first section of the duct housing, the first section naturally forms a smaller inner diameter due to its local concavity, thus achieving a good dimensional match with the relatively small outer diameter of the first air delivery component. Simultaneously, the control module is directly embedded in this mounting groove, utilizing the external space of the duct housing to complete the integrated layout of electronic components. This not only avoids the control module occupying internal duct space, effectively ensuring unobstructed airflow, reducing wind resistance and operating noise, but also improves the compactness and space utilization of the overall structure. Furthermore, the mounting groove itself provides reliable positioning, support, and protection for the control module, simplifying the assembly process, facilitating later maintenance, and contributing to improved product consistency, reliability, and production efficiency. Moreover, embedding the control module within the outer wall of the duct housing makes the overall appearance more concise and streamlined, avoiding the abruptness of traditional exposed structures, enhancing functionality while maintaining the overall aesthetic appeal of the industrial design.

[0028] In one alternative embodiment, the housing assembly further includes a housing that covers the mounting groove.

[0029] Beneficial effects: By covering the mounting slot of the air duct housing with the outer shell, the control module located in the mounting slot is effectively concealed and wrapped, preventing the control module from being exposed. This not only improves the cleanliness and aesthetics of the overall appearance, but also enhances the physical protection and dust and moisture resistance of the control module, reducing the risk of failure caused by accidental contact or environmental factors. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a side sectional view of a fan device according to an embodiment of the present invention; Figure 2 This is an exploded view of the fan device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the air duct shell according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first wind turbine according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the second wind turbine according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the second support in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures: 1. Housing assembly; 11. Duct housing; 111. First section; 112. Second section; 113. Mounting slot; 12. Annular grille; 13. First mesh cover; 14. Second mesh cover; 15. Outer shell; 21. First support; 22. Second support; 221. Third ring structure; 222. Fourth ring structure; 223. Second support arm; 224. Third support arm; 23. First fan blade knob; 24. Second fan blade knob; 3. First air supply assembly; 31. First drive motor; 32. First wind turbine; 4. Second air supply assembly; 41. Second drive motor; 42. Second impeller; 421. Support frame; 4211. Airflow channel; 4212. First annular structure; 4213. Second annular structure; 4214. First support arm; 422. Fan blade; 43. Heating element; 5. Control module. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0038] According to an embodiment of the present invention, a fan device is provided, including a housing assembly 1, a first air supply assembly 3, a second air supply assembly 4, and a control module 5; the housing assembly 1 is provided with a mounting bracket; the first air supply assembly 3 includes a first drive motor 31 and a first impeller 32; the first drive motor 31 is mounted on the mounting bracket; the first impeller 32 is mounted on the output shaft of the first drive motor 31; the second air supply assembly 4 includes a second drive motor 41, a second impeller 42, and a heating element 43; the second drive motor 41 is mounted on the mounting bracket, and the output shaft of the second drive motor 41 is coaxially arranged with the output shaft of the first drive motor 31; the second impeller 42 is mounted on the output shaft of the second drive motor 41; the heating element 43 is mounted on the mounting bracket and located in the airflow channel 4211 generated by the second impeller 42; the control module 5 is communicatively connected to both the first drive motor 31 and the second drive motor 41.

[0039] In the above embodiments, the housing assembly 1 and the mounting bracket provide a stable mounting foundation for each component. The first air supply assembly 3 and the second air supply assembly 4 are arranged with their output shafts coaxially, which ensures the compactness of the structure, saves installation space, and allows the airflow channel 4211 to be smoother. At the same time, the control module 5 is communicatively connected to the two drive motors, which can independently control the operating status of the first air supply assembly 3 and the second air supply assembly 4. The first air supply assembly 3 can be controlled independently to achieve the normal air supply function, and the second air supply assembly 4 can be controlled independently to output hot air in conjunction with the heating element 43. They can also be operated synchronously to achieve mixed air supply of hot and cold air, or alternately start and stop to form an alternating hot and cold air feel. The combination of the two makes the equipment have multiple levels and multiple functions of air supply selection to meet the needs of different scenarios. The adjustment method is flexible and convenient, which improves the diversity of air supply modes and user comfort, and meets the needs of different seasons and scenarios.

[0040] In a specific implementation, the control module 5 can independently control the start / stop and speed of the first drive motor 31 and the second drive motor 41. Users can select cold air mode, warm air mode, or dual-mode (cold and warm) via remote control or mobile terminal. In cold air mode, the control module 5 only starts the first drive motor 31, driving the first fan wheel 32 to rotate, so that the airflow is directly delivered through the cold air duct without passing through the heating element 43, ensuring that the delivered airflow is cool and free from heat interference. In warm air mode, the control module 5 starts the second drive motor 41 and dynamically adjusts its speed according to the heating power of the heating element 43, so that the airflow speed matches the heat output, thereby achieving a stable and uniform constant warm air output. In dual-mode (cold and warm), the control module 5 starts the first drive motor 31 and the second drive motor 41 simultaneously and adjusts their speeds respectively, so that the cold air and warm air are delivered independently along their respective air ducts, achieving the effect of zoned cold and warm air and synchronous air delivery, meeting the user's needs for diverse air delivery experiences.

[0041] In one embodiment, the second impeller 42 includes a support frame 421 and a plurality of fan blades 422; the support frame 421 is mounted on the output shaft of the second drive motor 41; and the support frame 421 is provided with an airflow channel 4211; the plurality of fan blades 422 are arranged around the outer periphery of the support frame 421; wherein, the outer diameter of the first impeller 32 is less than or equal to the diameter of the airflow channel 4211; and the heating element 43 is axially aligned with the fan blades 422.

[0042] In the above embodiment, by setting a through airflow channel 4211 in the axial central region of the support frame 421 of the second impeller 42, and making the outer diameter of the first impeller 32 smaller than or equal to the diameter of the airflow channel 4211, the cold airflow generated by the first impeller 32 can directly pass through the airflow channel 4211 in the second impeller 42 axially. Meanwhile, the multiple blades 422 of the second impeller 42 are distributed around the outer periphery of the support frame 421, driving the airflow through its outer peripheral channels to achieve efficient heat exchange with the corresponding heating element 43. Therefore, the cold air and warm air flow independently in two physically isolated paths—the central channel and the outer peripheral channel—effectively avoiding the common problem of airflow obstruction or interference in coaxial dual-impeller structures. This spatial separation design not only ensures that the cold air is not heated and the warm air is not cooled, improving the purity and temperature stability of the delivered air, but also eliminates the complex duct switching mechanism in traditional structures, making the airflow path shorter and more direct, thereby reducing flow resistance and energy loss, and improving the overall energy efficiency. Meanwhile, the hot and cold airflows remain separate before being output, and can be delivered independently, mixed synchronously, or alternately as needed. This ensures both the uniformity and comfort of the air supply temperature, and achieves efficient integration and compact layout of the dual-duct system.

[0043] In one embodiment, the support frame 421 includes a first annular structure 4212, a second annular structure 4213, and a plurality of first support arms 4214; the first annular structure 4212 is fixedly connected to the output shaft of the second drive motor 41; the second annular structure 4213 is coaxial with and spaced apart from the first annular structure 4212, and forms an airflow channel 4211 between them; the outer diameter of the first impeller 32 is less than or equal to the inner diameter of the second annular structure 4213, and a plurality of fan blades 422 are arranged around the outer periphery of the second annular structure 4213; a plurality of first support arms 4214 are arranged around the outer periphery of the first annular structure 4212; and the first support arms 4214 extend radially, with one end connected to the first annular structure 4212 and the other end connected to the second annular structure 4213, and a flow gap is provided between adjacent first support arms 4214.

[0044] In the above embodiment, the support frame 421 forms a stable overall frame by means of a first annular structure 4212 and a second annular structure 4213 arranged coaxially and spaced apart, together with a plurality of first support arms 4214 extending radially. This frame can synchronously transmit the power from the output shaft of the second drive motor 41 to the fan blade 422, avoiding shaking or eccentricity during operation and ensuring the stability and consistency of the rotation of the fan blade 422. It can also rely on the flow gap between the support arms to not block the airflow channel 4211, allowing the airflow driven by the first impeller 32 to flow out smoothly.

[0045] Specifically, the heating element 43 is arranged in a ring structure, and the inner diameter of the heating element 43 is greater than or equal to the outer diameter of the second ring structure 4213.

[0046] In one embodiment, the housing assembly 1 includes a duct housing 11, which includes a first section 111 and a second section 112 arranged sequentially along the axial direction; a first air supply assembly 3 is located in the first section 111, and a second air supply assembly 4 is located in the second section 112.

[0047] In the above embodiments, by dividing the duct housing 11 axially into a first section 111 and a second section 112, and respectively arranging the first air supply component 3 and the second air supply component 4, an orderly partitioned layout of the dual-duct system is achieved. Simultaneously, the partitioned layout allows the airflow channels 4211 of the two air supply components to be independent yet axially connected. The conventional airflow of the first air supply component 3 and the hot airflow formed by the second air supply component 4 and the heating element 43 can flow smoothly without interfering with each other, effectively ensuring air supply efficiency and heating effect. Furthermore, the clear partitioning makes the assembly and positioning of the two air supply components clearer, reducing the difficulty of alignment during production assembly. It also allows for quick location of components according to the corresponding sections during later maintenance. Combined with the overall housing structure, this improves the rationality of the equipment structure and the convenience of use and maintenance.

[0048] Specifically, the air duct shell 11 is cylindrical in shape, forming the main airflow channel 4211.

[0049] In one embodiment, the mounting bracket further includes a first bracket 21, which is mounted on a first section 111 of the air duct housing 11, and a first drive motor 31 is fixed to the first bracket 21.

[0050] In the above embodiment, by setting a first bracket 21 in the first section 111 of the duct housing 11 and firmly fixing the first drive motor 31 to the bracket, modular installation and precise positioning of the first air supply assembly 3 are achieved. This not only effectively improves the stability of the first drive motor 31 during operation and reduces noise and component loosening risks caused by vibration, but also facilitates assembly and subsequent maintenance. Meanwhile, the first bracket 21, as a transitional connector between the first drive motor 31 and the duct housing 11, can be flexibly designed in shape and installation position according to the spatial layout, balancing structural strength and internal space utilization, ensuring reliable operation of the first air supply assembly 3 within the limited duct space.

[0051] Specifically, the first bracket 21 can be combined with the air duct housing 11 in a variety of ways: it can be integrally formed with the air duct housing 11, it can be installed in the air duct housing 11 by a fixed connection, or it can be assembled in the air duct housing 11 by a detachable connection structure.

[0052] In one embodiment, the mounting bracket further includes a second bracket 22, which is mounted on the second section 112 of the air duct housing 11, and the second drive motor 41 and the heating element 43 are both fixed to the second bracket 22.

[0053] In the above embodiment, by setting a second bracket 22 in the second section 112 of the air duct housing 11, and fixing the second drive motor 41 and the heating element 43 together on the second bracket 22, modular integrated installation of the core components of the heating system is achieved. This not only ensures the relative positional stability between the second drive motor 41 and the heating element 43, avoiding displacement or poor contact caused by vibration or thermal expansion, but also simplifies the assembly process of the second drive motor 41 and the heating element 43, reducing the difficulty of production assembly. During later maintenance, components can be quickly inspected or replaced by disassembling and assembling the second bracket 22. Combined with the partitioned design of the overall structure, this approach balances the stability of equipment operation, the rationality of the structural layout, and the convenience of maintenance.

[0054] Specifically, the second bracket 22 is detachably connected to the air duct housing 11.

[0055] In one embodiment, the second support 22 includes a third annular structure 221, a fourth annular structure 222, and a plurality of second support arms 223; a second drive motor 41 is mounted on the third annular structure 221; the fourth annular structure 222 is coaxial with and spaced apart from the third annular structure 221, and forms a flow channel with the third annular structure 221; the flow channel is axially aligned with and communicates with the airflow channel 4211; the outer diameter of the first impeller 32 is less than or equal to the inner diameter of the fourth annular structure 222; the heating element 43 is sleeved on the outer periphery of the fourth annular structure 222; a plurality of second support arms 223 are arranged around the outer periphery of the third annular structure 221; and the second support arms 223 extend radially, with one end connected to the third annular structure 221 and the other end connected to the fourth annular structure 222, and a flow gap is provided between adjacent second support arms 223.

[0056] In the above embodiment, the second bracket 22, through the coaxially spaced third annular structure 221 and fourth annular structure 222, together with multiple radially extending second support arms 223, forms a rigid and stable frame. This not only enables the installation and positioning of the second drive motor 41 and the heating element 43, and securely installs the second drive motor 41 and the heating element 43 to prevent displacement or shaking during operation, but also allows the heating element 43 to be assembled more neatly through the fourth annular structure 222, conforming to the correspondence with the fan blades 422 of the second impeller 42. At the same time, the flow channel between the third annular structure 221 and the fourth annular structure 222 is axially aligned and connected with the airflow channel 4211 of the second impeller 42, and a flow gap is reserved between adjacent second support arms 223 to avoid obstructing the airflow path and guide the airflow driven by the first impeller 32 to flow out smoothly.

[0057] In one embodiment, the second bracket 22 further includes a plurality of third support arms 224, which are distributed sequentially at intervals around the outer periphery of the fourth annular structure 222, and the third support arms 224 are disposed on the side of the heating element 43 away from the second impeller 42.

[0058] In the above embodiment, multiple third support arms 224 are distributed around the outer periphery of the fourth annular structure 222 at intervals, and are located on the side of the heating element 43 away from the second fan wheel 42. This can further strengthen the overall rigidity of the fourth annular structure 222, and provide lateral support and limit for the heating element 43 sleeved on its outer periphery. This prevents the heating element 43 from deforming or displacing due to long-term heating or airflow impact, and ensures the relative positional accuracy of the heating element 43 and the airflow channel 4211. At the same time, the spaced distribution design of the third support arms 224 does not block the hot air output path, does not affect the smooth diffusion of the airflow after being heated by the heating element 43, and can also help guide the airflow to be output evenly, thus improving the user experience.

[0059] In one embodiment, the housing assembly 1 further includes an annular grille 12, which is disposed on the side of the heating element 43 away from the second impeller 42, axially aligned with the position of the heating element 43, and fixed to the air duct housing 11.

[0060] In the above embodiment, by setting an annular grille 12 on the side of the heating element 43 away from the second fan wheel 42, that is, setting the annular grille 12 on the air outlet side of the heating element 43 and fixing the annular grille 12 to the air duct housing 11, a safety protection barrier is formed, which can prevent users from directly touching the high-temperature heating element 43 and causing burns. At the same time, it can prevent foreign objects from entering the airflow channel 4211 and damaging the internal components, thus improving the safety of equipment use. Furthermore, the annular grille 12 is axially aligned with the heating element 43 and matches the warm air duct. This can guide the airflow heated by the heating element 43 to be output evenly and stably, avoiding airflow turbulence from affecting heating efficiency and user experience, while not significantly obstructing the discharge of warm airflow and ensuring air delivery efficiency.

[0061] Specifically, the airflow cutting and air delivery area covered by the fan blades 422 of the second impeller 42 matches the air outlet area of ​​the annular grille 12, ensuring that the warm airflow is concentrated and efficiently delivered to the target area, thereby improving air delivery efficiency and thermal experience.

[0062] In one embodiment, the housing assembly 1 further includes a first mesh cover 13, which is located on the side of the second air supply assembly 4 away from the first air supply assembly 3, axially aligned with the position of the airflow channel 4211, and fixed to the inner periphery of the annular grille 12.

[0063] In the above embodiment, a first mesh cover 13 is provided on the side of the second air supply assembly 4 away from the first air supply assembly 3, and fixed to the inner periphery of the annular grille 12, and aligned axially with the airflow channel 4211 of the second impeller 42. This allows the first mesh cover 13 to cover the cold air outlet area generated by the first impeller 32 and passing through the airflow channel 4211 of the support frame 421. This not only effectively prevents users from contacting the internal rotating parts and avoids foreign objects entering the air duct, improving safety, but also straightens and guides the cold airflow, reducing airflow turbulence and eddy loss, making the airflow more stable and concentrated. Simultaneously, the first mesh cover 13 is embedded inside the annular grille 12, making full use of radial space and avoiding additional product volume, thus improving the compactness and overall appearance of the machine while ensuring functionality.

[0064] In one embodiment, the housing assembly 1 further includes a second mesh cover 14, which is fixed to the air duct housing 11 and located on the side of the first air supply assembly 3 away from the second air supply assembly 4.

[0065] In the above embodiment, the second mesh cover 14 is fixed to the air duct housing 11 and located on the side of the first air supply component 3 away from the second air supply component 4. Together with the annular grille 12 and the first mesh cover 13, it forms an omnidirectional protection, effectively blocking foreign objects from entering the air duct from the input end, avoiding damage to core components such as the first drive motor 31 and the first impeller 32. It also prevents users from touching the rotating parts at the input end, enhancing safety. Furthermore, since the second mesh cover 14 is installed in the airflow input path of the first air supply component 3, it helps guide the airflow smoothly into the air duct housing 11, reducing turbulence and wind noise, and improving air delivery efficiency and comfort. At the same time, directly fixing the second mesh cover 14 to the air duct housing 11 results in a stable structure and simple assembly, requiring no additional support components. This ensures a simple appearance while enhancing the reliability and maintenance convenience of the entire unit.

[0066] In a specific embodiment, the first drive motor 31 is fixedly mounted on the first bracket 21, with its output shaft extending towards the first mesh cover 13, passing through the first impeller 32, and then fixedly connected to the first fan blade knob 23, thereby driving the first impeller 32 to rotate. Airflow enters the equipment from the second mesh cover 14, first accelerating through the first impeller 32, then flowing along the cold air duct path, and passing through the airflow channel 4211 within the second impeller 42 support frame 421, finally being blown directly out from the first mesh cover 13. Throughout the entire cold air path, the airflow does not pass through any heating elements, effectively avoiding thermal interference and ensuring that the delivered cold air temperature is stable and free from thermal interference.

[0067] In a specific embodiment, the second drive motor 41 is fixedly mounted on the second bracket 22, with its output shaft extending towards the second mesh cover 14, passing through the second impeller 42, and fixedly connected to the second fan blade knob 24, thereby driving the second impeller 42 to rotate. The heating element 43 has an annular structure and is fixedly disposed between the fan blade 422 of the second impeller 42 and the annular grille 12. During operation, airflow enters from the second mesh cover 14, is first drawn in and accelerated by the fan blade 422 of the second impeller 42, and then enters the warm air duct; in the warm air duct, the airflow flows through the annular heating element 43, is heated to the set temperature, and finally blown out through the annular grille 12.

[0068] Specifically, the set temperature of the heating element 43 is generally 40℃~60℃.

[0069] In one embodiment, the outer wall of the first section 111 is provided with a mounting groove 113, and the control module 5 is mounted in the mounting groove 113.

[0070] In the above embodiment, by providing an installation groove 113 on the outer wall of the first section 111 of the duct housing 11, the first section 111 naturally forms a smaller inner diameter due to its local concavity, thereby achieving a good size match with the first air delivery component 3, which has a relatively small outer diameter. Simultaneously, the control module 5 is directly embedded in the installation groove 113, utilizing the external space of the duct housing 11 to complete the integrated layout of electronic components. This not only avoids the control module 5 occupying internal duct space, effectively ensuring the unobstructed flow of the airflow channel 4211, reducing wind resistance and operating noise, but also improves the compactness and space utilization of the overall structure. Furthermore, the installation groove 113 itself provides reliable positioning, support, and protection for the control module 5, simplifying the assembly process, facilitating later maintenance, and contributing to improved product consistency, reliability, and production efficiency. Moreover, by embedding the control module 5 within the outer wall of the duct housing 11, the overall appearance of the machine is more concise and streamlined, avoiding the abruptness of traditional exposed structures, enhancing functionality while maintaining the overall aesthetic appeal of the industrial design.

[0071] In one embodiment, the housing assembly 1 further includes a housing 15 that covers the mounting groove 113.

[0072] In the above embodiments, by covering the mounting groove 113 of the air duct housing 11 with the outer shell 15, the control module 5 located in the mounting groove 113 is effectively shielded and wrapped, preventing the control module 5 from being exposed. This not only improves the neatness and aesthetics of the overall appearance, but also enhances the physical protection and dustproof and moisture-proof capabilities of the control module 5, reducing the risk of failure caused by accidental contact or environmental factors.

[0073] Preferably, the outer surface of the outer shell 15 is flush with the outer surface of the second section 112 of the air duct shell 11, thereby forming a continuous and smooth uniform outline on the outside of the whole machine, which enhances the overall aesthetics and texture of the product.

[0074] Specifically, the mounting groove 113 is an annular groove.

[0075] Specifically, the outer shell 15 includes a first shell and a second shell. The first shell and the second shell are spliced ​​together and fixed together to the outer periphery of the annular groove of the air duct shell 11. The first shell and the second shell are connected as one unit by means of buckles, screws or welding to form a complete covering structure for the first section 111.

[0076] In a specific embodiment, during assembly, the first drive motor 31 is first installed on the first bracket 21 inside the air duct housing 11. Then, the first impeller 32 is fitted onto the output shaft of the first drive motor 31 and fixed by the first fan blade knob 23. Next, the heating element 43 and the second drive motor 41 are respectively fixedly installed on the second bracket 22. Then, the second impeller 42 is installed onto the output shaft of the second drive motor 41 and locked using the second fan blade knob 24. Subsequently, the assembled second bracket 22 is fixedly installed into the air duct housing 11. The annular grille 12, the first mesh cover 13, and the second mesh cover 14 are installed in sequence to complete the assembly of the whole machine.

[0077] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended application.

Claims

1. A fan device, characterized in that, include: The housing assembly (1) has an internal mounting bracket; The first air supply assembly (3) includes a first drive motor (31) and a first impeller (32); the first drive motor (31) is mounted on the mounting bracket; the first impeller (32) is mounted on the output shaft of the first drive motor (31); The second air supply assembly (4) includes a second drive motor (41), a second impeller (42), and a heating element (43). The second drive motor (41) is mounted on the mounting bracket, and the output shaft of the second drive motor (41) is coaxially arranged with the output shaft of the first drive motor (31). The second impeller (42) is mounted on the output shaft of the second drive motor (41). The heating element (43) is mounted on the mounting bracket and located in the airflow channel (4211) generated by the second impeller (42). The control module (5) is communicatively connected to both the first drive motor (31) and the second drive motor (41).

2. The fan device according to claim 1, characterized in that, The second wind turbine (42) includes: A support frame (421) is installed on the output shaft of the second drive motor (41); and an airflow channel (4211) is provided inside the support frame (421). Multiple fan blades (422) are arranged around the outer periphery of the support frame (421); Wherein, the outer diameter of the first impeller (32) is less than or equal to the diameter of the airflow channel (4211); the heating element (43) is axially aligned with the fan blade (422).

3. The fan device according to claim 2, characterized in that, The support frame (421) includes: The first annular structure (4212) is fixedly connected to the output shaft of the second drive motor (41); The second annular structure (4213) is coaxial with and spaced apart from the first annular structure (4212), and forms the airflow channel (4211) between the second annular structure (4212); the outer diameter of the first impeller (32) is less than or equal to the inner diameter of the second annular structure (4213), and a plurality of fan blades (422) are arranged around the outer periphery of the second annular structure (4213); Multiple first support arms (4214) are arranged around the outer periphery of the first annular structure (4212); and the first support arms (4214) extend radially, with one end connected to the first annular structure (4212) and the other end connected to the second annular structure (4213), and a flow gap is provided between adjacent first support arms (4214).

4. The fan device according to claim 2, characterized in that, The housing assembly (1) includes a duct housing (11), which includes a first section (111) and a second section (112) arranged sequentially along the axial direction; the first air supply assembly (3) is located in the first section (111), and the second air supply assembly (4) is located in the second section (112).

5. The fan device according to claim 4, characterized in that, The mounting bracket includes a first bracket (21), which is installed in the first section (111) of the air duct housing (11), and the first drive motor (31) is fixed to the first bracket (21).

6. The fan device according to claim 4, characterized in that, The mounting bracket also includes a second bracket (22), which is installed in the second section (112) of the air duct housing (11). The second drive motor (41) and the heating element (43) are both fixed to the second bracket (22).

7. The fan device according to claim 6, characterized in that, The second support (22) includes: The third ring structure (221) is on which the second drive motor (41) is mounted; The fourth annular structure (222) is coaxial with and spaced apart from the third annular structure (221), and forms a flow channel with the third annular structure (221); the flow channel is axially aligned with and connected to the airflow channel (4211); the outer diameter of the first impeller (32) is less than or equal to the inner diameter of the fourth annular structure (222); and the heating element (43) is sleeved on the outer periphery of the fourth annular structure (222). Multiple second support arms (223) are arranged around the outer periphery of the third annular structure (221); and the second support arms (223) extend radially, with one end connected to the third annular structure (221) and the other end connected to the fourth annular structure (222), and a flow gap is provided between adjacent second support arms (223).

8. The fan device according to claim 7, characterized in that, The second bracket (22) also includes a plurality of third support arms (224), which are arranged sequentially at intervals around the outer periphery of the fourth annular structure (222), and the third support arms (224) are located on the side of the heating element (43) away from the second impeller (42).

9. The fan device according to any one of claims 4 to 8, characterized in that, The housing assembly (1) further includes an annular grille (12), which is disposed on the side of the heating element (43) away from the second impeller (42), axially aligned with the position of the heating element (43), and fixed to the air duct housing (11).

10. The fan device according to claim 9, characterized in that, The housing assembly (1) further includes a first mesh cover (13), which is located on the side of the second air supply assembly (4) away from the first air supply assembly (3), axially aligned with the position of the airflow channel (4211), and fixed to the inner periphery of the annular grille (12).

11. The fan device according to any one of claims 4 to 8, characterized in that, The housing assembly (1) further includes a second mesh cover (14), which is fixed to the air duct housing (11) and located on the side of the first air supply assembly (3) away from the second air supply assembly (4).

12. The fan device according to any one of claims 4 to 8, characterized in that, The outer wall of the first section (111) is provided with a mounting groove (113), and the control module (5) is installed in the mounting groove (113).

13. The fan device according to claim 12, characterized in that, The housing assembly (1) further includes a housing (15) which covers the mounting groove (113).

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