Cooling and heating air ducts and fans

Abstract

The application relates to the fan technical field and discloses a cold and warm air duct and a fan, wherein the cold and warm air duct comprises a cold air duct, a warm air duct which is surrounded outside the cold air duct and is provided with a heating body, and a wind blocking assembly which comprises a driving structure and a wind blocking structure; the wind blocking structure can be extended or retracted under the driving of the driving structure; when the wind blocking structure is extended, the cold air duct is in a blocking state; and when the wind blocking structure is retracted, the cold air duct is in a flowing state. According to the application, the warm air duct is surrounded outside the cold air duct, so that the space can be fully utilized and the occupied volume is reduced. When warm air needs to be blown, the heating body works, the driving structure drives the wind blocking structure to extend, the cold air duct is in the blocking state, at this moment, the cold air duct without the heating body has no air passing through, only the warm air duct blows hot air, the heat of the heating body is not dispersed, and the warm air blowing effect is good.

Description

Technical Field

[0001] This invention relates to the field of fan technology, specifically to hot and cold air ducts and fans. Background Technology

[0002] There are two types of fans for both cooling and heating in related technologies. One type features two separate air ducts: a cooling duct and a heating duct. Air is directed to either the cooling or heating duct depending on the desired direction. This increases the fan's size due to the two ducts and the need for two separate fan blades, increasing costs. The second type uses a single air duct for both cooling and heating. The internal heating element moves to switch between cooling and heating modes. When cooling, the heating element is hidden; when heating, it moves to the duct opening, heating the air before it is expelled. This type also increases fan size because it requires space for the heating element to move. Furthermore, if space constraints prevent the heating element from fully covering the duct opening, the heating energy is not concentrated, and the areas without heating elements at the duct opening disperse heat, leading to decreased heating efficiency and poor heating performance. Summary of the Invention

[0003] In view of this, the present invention provides a hot and cold air duct and a fan to solve the problem that hot and cold air ducts in related technologies are large in size and are prone to poor warm air blowing effect.

[0004] In a first aspect, the present invention provides a hot and cold air duct, comprising:

[0005] Cold air duct;

[0006] A warm air duct surrounds the cold air duct, and the warm air duct is equipped with a heating element;

[0007] A windbreak assembly includes a drive structure and a windbreak structure. The windbreak structure can extend or retract under the drive of the drive structure. When the windbreak structure extends, the cold air duct is blocked. When the windbreak structure retracts, the cold air duct is open.

[0008] Beneficial effects: By surrounding the cold air duct with the warm air duct, space can be fully utilized and volume reduced. When warm air is needed, the heating element operates, and the drive structure extends the baffle structure, blocking the cold air duct. At this time, no air flows through the cold air duct without the heating element, and only the warm air duct blows hot air. The heat from the heating element is not dissipated, resulting in excellent warming effect. When cold air is needed, the heating element is not operating, and the drive structure retracts the baffle structure, allowing the cold air duct to flow freely. Both the warm and cold air ducts can blow cold air normally, ensuring sufficient airflow.

[0009] In one optional embodiment, the heating and cooling air duct includes a fixing component, the driving structure includes a drive motor fixedly mounted on the fixing component and a plurality of gears connected to the output shaft of the drive motor, and the wind deflector structure includes a plurality of wind deflectors rotatably mounted on the fixing component, the wind deflectors having meshing portions that mesh with the gears and can extend or retract under the drive of the gears.

[0010] Beneficial effects: When warm air is needed, the drive motor rotates the gears, causing the baffle to extend in the first direction, blocking the cold air duct. At this time, no air flows through the cold air duct without a heating element, only the warm air duct blows hot air. The heat from the heating element is not dissipated, resulting in excellent warming effect. When cold air is needed, the heating element is not working, and the drive motor rotates the gears. The baffle retracts in the second direction, allowing the cold air duct to flow freely. Both the warm and cold air ducts can blow cold air normally, ensuring sufficient airflow. This method of extending or retracting the baffle via gear rotation allows one gear to drive multiple baffles, resulting in a simple, reliable structure with minimal space requirements.

[0011] In one optional embodiment, the fixing component includes a bracket, the bracket including a central mounting portion, an annular outer contour, and multiple connecting strips connecting the central mounting portion and the annular outer contour. The space between any two connecting strips constitutes a cold air sub-duct, and the multiple cold air sub-ducts together constitute the cold air duct. When the baffle is extended, each baffle corresponds to and axially blocks the cold air sub-duct. When the baffle is retracted, the baffle is located on the side of the central mounting portion in the axial direction.

[0012] Beneficial effects: The bracket design creates a cold air duct on one hand, and the space on the side of the central mounting section of the bracket accommodates the retractable baffle on the other, resulting in a compact structure and high space utilization. Specifically, when warm air is needed, the drive motor rotates the gear, causing the baffle to swing in the first direction and extend. Each baffle axially blocks a cold air sub-duct, preventing airflow through the cold air duct without a heating element. Only the warm air duct blows hot air, ensuring the heat from the heating element is not dissipated and providing excellent warming effect. When cold air is needed, the heating element is not activated. The drive motor rotates the gear, causing the baffle to swing in the second direction and retract. The baffle retracts into the space on the side of the central mounting section, allowing the cold air duct to flow freely. Both the warm and cold air ducts can then blow cold air normally, ensuring sufficient airflow.

[0013] In one optional embodiment, the plurality of gears are respectively a first gear and a second gear, the first gear is located on a first side in the axial direction of the bracket, the second gear is located on a second side in the axial direction of the bracket, the first gear and the second gear are respectively meshed with a plurality of wind deflectors in the circumferential direction, and the wind deflectors meshing with the first gear and the wind deflectors meshing with the second gear are alternately arranged in the circumferential direction.

[0014] Beneficial effects: The drive motor can simultaneously drive the first gear and the second gear to rotate. The rotation of the first gear and the second gear can simultaneously drive the wind deflectors on both sides to swing and extend or retract. Since there is no contact between two adjacent wind deflectors on each side, there will be no mutual interference when retracting, and the space occupied after retraction is smaller.

[0015] In one alternative embodiment, the fixing assembly further includes a first cover plate fixed to a first side of the bracket, a first gear located between the first cover plate and the bracket, and a windshield meshing with the first gear being rotatably connected to the first cover plate and / or the bracket.

[0016] Beneficial effects: The first cover plate can cover the first gear, making it more aesthetically pleasing. In addition, when the multiple wind deflectors that mesh with the first gear retract, they can be covered.

[0017] In one alternative embodiment, the fixing assembly further includes a second cover plate fixed to a second side of the bracket, a second gear located between the second cover plate and the bracket, and a windshield meshing with the second gear being rotatably connected to the second cover plate and / or the bracket.

[0018] Beneficial effects: The second cover can cover the second gear, making it more aesthetically pleasing. In addition, when the multiple wind deflectors that mesh with the second gear retract, they can be covered.

[0019] In one optional embodiment, the first cover plate is provided with a first limiting part, and the first gear is provided with a second limiting part. The first limiting part and the second limiting part cooperate to limit the rotation angle of the first gear.

[0020] Beneficial effects: The first limiting part and the second limiting part work together to limit the rotation angle of the first gear, thereby facilitating precise control of the rotation angle of the first gear.

[0021] In one optional embodiment, the first limiting part is one of an arc-shaped hole and a protruding post, and the second limiting part is the other of an arc-shaped hole and a protruding post, wherein the protruding post extends into the arc-shaped hole.

[0022] Beneficial effect: The arc-shaped hole limits the movement of the protruding post, thereby limiting the rotation angle of the first gear. Specifically, when the protruding post is located at one end of the arc-shaped hole, the baffle plate extends; when the protruding post is located at the other end of the arc-shaped hole, the baffle plate retracts.

[0023] In one optional embodiment, the fixing component further includes a main body, the first cover plate is fixed to the main body, the drive motor is fixedly disposed on the main body or the first cover plate, the main body has a main air duct communicating with the cold air duct and the warm air duct, and the heating element is located at the air inlet of the main air duct.

[0024] Beneficial effect: By placing the heating element at the air inlet of the main air duct, the user cannot see the heating element when the fan is working, which can improve the visual experience.

[0025] In one alternative embodiment, a mounting bracket is provided on the outer side of the annular outer contour, and the heating element is disposed on the mounting bracket and surrounds the outer side of the annular outer contour.

[0026] Beneficial effects: By setting the mounting bracket on the outside of the annular outer contour, it is easy to install and fix the heating element. At the same time, the heating element is located on the outside of the annular outer contour, which can isolate the cold air duct and the warm air duct.

[0027] In one alternative embodiment, the heating element comprises multiple turns of heating wire evenly spaced along both the axial and radial directions.

[0028] Beneficial effects: The heating element consists of multiple coils of heating wire evenly spaced along both the axial and radial directions, which can fully and evenly heat the air, resulting in uniform temperature of the blown-out warm air and improving the user experience.

[0029] Secondly, the present invention also provides a fan, including the aforementioned hot and cold air duct.

[0030] Beneficial effects: The fan's warm air duct surrounds the cold air duct, making full use of space and reducing its footprint. When warm air is needed, the heating element operates, and the drive mechanism extends the baffle, blocking the cold air duct. At this time, no air flows through the cold air duct without the heating element, leaving only the warm air duct blowing hot air. The heat from the heating element is not dissipated, resulting in excellent warming effect. When cold air is needed, the heating element is not operating, and the drive mechanism retracts the baffle, allowing the cold air duct to flow freely. Both the warm and cold air ducts can blow cold air normally, ensuring sufficient airflow. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art 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.

[0032] Figure 1 This is a schematic diagram of a heating and cooling air duct according to an embodiment of the present invention;

[0033] Figure 2 for Figure 1 The cross-sectional view of the heating and cooling air duct shown;

[0034] Figure 3 This is an exploded view of a heating and cooling air duct according to an embodiment of the present invention;

[0035] Figure 4 This is a structural diagram of the hot and cold air duct without the main body and with the baffle retracted.

[0036] Figure 5 This is a first-person view diagram of the hot and cold air duct without the main body and with the wind deflector extended.

[0037] Figure 6 This is a second-view diagram of the hot and cold air duct when the main body is not included and the wind deflector is extended.

[0038] Figure 7 This is a first-person perspective schematic diagram of the first gear.

[0039] Figure 8 This is a second-view diagram of the first gear.

[0040] Figure 9 This is a schematic diagram of the second gear.

[0041] Figure 10 This is a first-person view of the windshield.

[0042] Figure 11 This is a second-view illustration of the windshield.

[0043] Figure 12 This is a schematic diagram of the support structure;

[0044] Figure 13 This is a schematic diagram of the structure of the first cover plate.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Cold air duct; 2. Warm air duct; 3. Heating element; 4. Drive motor; 401. Output shaft; 5. Baffle plate; 501. Engaging part; 502. First arc-shaped edge; 503. Second arc-shaped edge; 504. Fourth arc-shaped edge; 505. Pin hole; 6. Bracket; 601. Middle mounting part; 6011. First mounting through hole; 602. Annular outer contour; 603. Connecting strip; 6031. Fourth screw hole; 604. Mounting bracket; 7. First gear; 701. First connecting part; 702. Second connecting part; 703. Second limiting part; 8. Second gear; 801. Third connecting part; 9. First cover plate; 901. First screw hole; 902. First limiting part; 903. Second mounting through hole; 10. Second cover plate; 1001. Third screw hole; 11. Main body. Detailed Implementation

[0047] 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.

[0048] There are two types of fans for both cooling and heating in related technologies. One type features two separate air ducts: a cooling duct and a heating duct. Air is directed to either the cooling or heating duct depending on the desired direction. This increases the fan's size due to the two ducts and the need for two separate fan blades, increasing costs. The second type uses a single air duct for both cooling and heating. The internal heating element moves to switch between cooling and heating modes. When cooling, the heating element is hidden; when heating, it moves to the duct opening, heating the air before it is expelled. This type also increases fan size because it requires space for the heating element to move. Furthermore, if space constraints prevent the heating element from fully covering the duct opening, the heating energy is not concentrated, and the areas without heating elements at the duct opening disperse heat, leading to decreased heating efficiency and poor heating performance.

[0049] In addition, existing heating and cooling fans include tower fans using cross-flow impellers and bladeless fans using centrifugal or mixed-flow impellers. These two types of fans can effectively hide the heat source inside the body, so the heat source is not visible when the user uses the fan from the front, which is more aesthetically pleasing. However, existing heating and cooling fans with axial blades place the heat source in front of the blades, i.e., at the air outlet, so the heat source is clearly visible to the user, which is less aesthetically pleasing.

[0050] The following is combined Figures 1 to 12 The following describes embodiments of the present invention.

[0051] According to an embodiment of the present invention, a cold and hot air duct is provided, including a cold air duct 1, a hot air duct 2, and a wind deflector assembly.

[0052] The warm air duct 2 surrounds the cold air duct 1, and the warm air duct 2 is equipped with a heating element 3; the wind deflector assembly includes a driving structure and a wind deflector structure. The wind deflector structure can extend or retract under the drive of the driving structure. When the wind deflector structure extends, the cold air duct 1 is in a blocked state. When the wind deflector structure retracts, the cold air duct 1 is in a flowing state.

[0053] In this embodiment, by surrounding the cold air duct 1 with the warm air duct 2, space can be fully utilized and the volume occupied can be reduced. When warm air is needed, the heating element 3 is activated, and the driving structure drives the wind deflector to extend, blocking the cold air duct 1. At this time, no air passes through the cold air duct 1 without the heating element 3, and only the warm air duct 2 blows hot air. The heat from the heating element 3 is not dissipated, resulting in excellent warm air blowing effect. When cold air is needed, the heating element 3 is deactivated, and the driving structure drives the wind deflector to retract. The cold air duct 1 is in a free-flowing state, and both the warm air duct 2 and the cold air duct 1 can blow cold air normally, ensuring airflow.

[0054] In one embodiment, the heating and cooling air duct includes a fixed component, the drive structure includes a drive motor 4 fixedly mounted on the fixed component and a plurality of gears connected to the output shaft 401 of the drive motor 4, and the wind deflector structure includes a plurality of wind deflector plates 5 rotatably mounted on the fixed component. The wind deflector plates 5 have a meshing portion 501 that meshes with the gears and can extend or retract under the drive of the gears.

[0055] In this embodiment, when warm air is needed, the drive motor 4 drives the gear to rotate. Under the drive of the gear, the baffle 5 swings in the first direction and extends, blocking the cold air duct 1. At this time, no air passes through the cold air duct 1 without the heating element 3, and only the warm air duct 2 blows hot air. The heat from the heating element 3 is not dissipated, resulting in excellent warm air blowing effect. When cold air is needed, the heating element 3 is not working, and the drive motor 4 drives the gear to rotate. Under the drive of the gear, the baffle 5 swings in the second direction and retracts, allowing the cold air duct 1 to be open. Both the warm air duct 2 and the cold air duct 1 can blow cold air normally, ensuring airflow. By using gear rotation to drive the baffle 5 to extend or retract, one gear can drive multiple baffles 5, resulting in a simple, reliable structure with minimal space occupation.

[0056] In addition, the extension or retraction of the baffle 5 is achieved by rotating the gears, which makes it more suitable for the common annular or circular shape of the cold air duct 1.

[0057] Specifically, such as Figure 10 and Figure 11As shown, the wind deflector 5 includes a first arc-shaped edge 502 adapted to abut against the outer contour of the cold air duct 1, and a second arc-shaped edge 503 and a third arc-shaped edge located on both sides. The arrangement of the second arc-shaped edge 503 and the third arc-shaped edge can better conform to the swing trajectory of the wind deflector 5, which is conducive to achieving complete retraction, and after retraction, all the wind deflectors 5 occupy less space.

[0058] Further reference Figure 10 and Figure 11 The meshing part 501 of the wind deflector 5 is an incomplete gear, which allows the wind deflector 5 to swing within a certain angle, making it easy to control precisely.

[0059] In one embodiment not shown in the figure, the wind deflector 5 extends or retracts by moving in the radial direction, and each wind deflector 5 needs to be provided with a corresponding drive structure to drive its movement.

[0060] In one embodiment, the fixing component includes a bracket 6, which includes a central mounting portion 601, an annular outer contour 602, and multiple connecting strips 603 connecting the central mounting portion 601 and the annular outer contour 602. The space between any two connecting strips 603 constitutes a cold air sub-duct, and the multiple cold air sub-ducts together constitute a cold air duct 1. When the baffle 5 is extended, each baffle 5 blocks the cold air sub-duct in the axial direction in a corresponding manner. When the baffle 5 is retracted, the baffle 5 is located on the side of the central mounting portion 601 in the axial direction.

[0061] In this embodiment, the bracket 6 forms a cold air duct 1 on one hand, and the space on the side of the central mounting part 601 in the middle of the bracket 6 is used to accommodate the retractable baffle 5. The structure is compact and the space utilization rate is high. Specifically, when warm air is needed, the drive motor 4 drives the gear to rotate. Under the drive of the gear, the baffle 5 swings in the first direction and extends. One baffle 5 blocks one cold air sub-duct in the axial direction. The baffle 5 blocks the cold air duct 1. At this time, there is no air passing through the cold air duct 1 without the heating element 3. Only the warm air duct 2 blows hot air. The heat of the heating element 3 is not dispersed, and the warm air blowing effect is good. When cold air is needed, the heating element 3 does not work. The drive motor 4 drives the gear to rotate. Under the drive of the gear, the baffle 5 swings in the second direction and retracts. The baffle 5 retracts into the space on the side of the central mounting part 601. The cold air duct 1 is in a flowing state. Both the warm air duct 2 and the cold air duct 1 can blow cold air normally, which can ensure the air volume.

[0062] In one embodiment, the gears are a first gear 7 and a second gear 8. The first gear 7 is located on the first side of the support 6 in the axial direction, and the second gear 8 is located on the second side of the support 6 in the axial direction. The first gear 7 and the second gear 8 are respectively meshed with a plurality of wind baffles 5 in the circumferential direction, and the wind baffles 5 meshing with the first gear 7 and the wind baffles 5 meshing with the second gear 8 are alternately arranged in the circumferential direction.

[0063] In this embodiment, the drive motor 4 can simultaneously drive the first gear 7 and the second gear 8 to rotate. The rotation of the first gear 7 and the second gear 8 can simultaneously drive the wind deflectors 5 on both sides to swing to extend or retract. Since there is no contact between two adjacent wind deflectors 5 on each side, there will be no mutual interference when retracting, and the space occupied after retraction is smaller.

[0064] Specifically, the first gear 7 has a first connecting part 701 on its first side, a second connecting part 702 on its second side, and a third connecting part 801 at its center. The bracket 6 has a first mounting through hole 601 at its center. The output shaft 401 of the drive motor 4 passes through the first connecting part 701 and is fixedly connected to it. The second connecting part 702 of the first gear 7 passes through the first mounting through hole 6011 and is fixedly connected to the third connecting part 801. The drive motor 4 can simultaneously drive the first gear 7 and the second gear 8 to rotate. This arrangement shortens the length of the output shaft 401 of the drive motor 4.

[0065] In one embodiment not shown in the figure, the output shaft 401 of the drive motor 4 can pass through the first connecting part 701, the first mounting through hole 6011 and the second connecting part 702 in sequence, and the output shaft 401 of the drive motor 4 is fixedly connected to the first connecting part 701 and the third connecting part 801 at the same time.

[0066] Specifically, such as Figure 7 and Figure 8 As shown, the first connecting part 701 is a non-circular hole, and the end of the output shaft 401 of the drive motor 4 is adapted to the shape of the first connecting part 701. The second connecting part 702 has protruding teeth on its outer side, and the third connecting part 801 is adapted to the shape of the second connecting part 702.

[0067] In one specific embodiment, a total of 8 wind deflectors 5 are provided, wherein the first gear 7 meshes with 4 wind deflectors 5 and the second gear 8 meshes with 4 wind deflectors 5.

[0068] In this embodiment, the number of wind deflectors 5 is not limited. It can be 8 as shown in the figure, or other numbers, such as 6 or 10.

[0069] In one embodiment not shown in the figure, only one gear may be provided. One gear meshes with multiple baffles 5 at the same time. When the gear rotates, it causes the multiple baffles 5 to swing. When the multiple baffles 5 meshing with the gear extend at the same time, the cold air duct 1 is completely blocked.

[0070] In one embodiment, the fixing assembly further includes a first cover plate 9, which is fixed to a first side of the bracket 6. A first gear 7 is located between the first cover plate 9 and the bracket 6, and a windshield 5 that meshes with the first gear 7 is rotatably connected to the first cover plate 9 and / or the bracket 6.

[0071] In this embodiment, the first cover plate 9 can cover the first gear 7, making it more aesthetically pleasing. On the other hand, when the multiple wind deflectors 5 that mesh with the first gear 7 retract, they can also cover the multiple wind deflectors 5.

[0072] In one specific embodiment, the wind deflector 5 is provided with a pin hole 505, and a pin passes through the pin hole 505 on the wind deflector 5 and is fixedly connected to the first cover plate 9, thereby realizing the hinge connection between the wind deflector 5 and the first cover plate 9.

[0073] In the first alternative embodiment, the wind deflector 5 is provided with a pin hole 505, and a pin passes through the pin hole 505 on the wind deflector 5 and is fixedly connected to the middle mounting part 601 of the bracket 6.

[0074] In a second alternative embodiment, the wind deflector 5 is provided with a pin hole 505, and the first cover plate 9 and the bracket 6 are provided with fixing holes. The pin passes through the pin hole 505 on the wind deflector 5 and is fixedly connected to the first cover plate 9 and the bracket 6 at the same time.

[0075] In one specific embodiment, the first cover plate 9 is connected to the bracket 6 by screws.

[0076] like Figure 13 As shown, the edge of the first cover plate 9 is provided with a plurality of first screw holes 901, and the connecting strip 603 of the bracket 6 is provided with a plurality of second screw holes (not shown in the figure). Screws pass through the first screw holes 901 and the second screw holes to fix the first cover plate 9 to the bracket 6.

[0077] In one embodiment not shown in the figure, the first cover plate 9 is connected to the bracket 6 by a snap-fit.

[0078] In one embodiment, the fixing assembly further includes a second cover plate 10, which is fixed to the second side of the bracket 6. A second gear 8 is located between the second cover plate 10 and the bracket 6, and a windshield 5 that meshes with the second gear 8 is rotatably connected to the second cover plate 10 and / or the bracket 6.

[0079] In this embodiment, the second cover plate 10 can cover the second gear 8, making it more aesthetically pleasing. On the other hand, when the multiple wind deflectors 5 that mesh with the second gear 8 retract, they can also be covered.

[0080] In one specific embodiment, the wind deflector 5 is provided with a pin hole 505, and a pin passes through the pin hole 505 on the wind deflector 5 and is fixedly connected to the second cover plate 10, thereby realizing the hinge connection between the wind deflector 5 and the second cover plate 10.

[0081] In a second alternative embodiment, the wind deflector 5 is provided with a pin hole 505, and a pin passes through the pin hole 505 on the wind deflector 5 and is fixedly connected to the middle mounting part 601 of the bracket 6.

[0082] In a second alternative embodiment, the wind deflector 5 is provided with a pin hole 505, and the second cover plate 10 and the bracket 6 are provided with fixing holes. The pin passes through the pin hole 505 on the wind deflector 5 and is fixedly connected to the second cover plate 10 and the bracket 6 at the same time.

[0083] In one specific embodiment, the second cover plate 10 is connected to the bracket 6 by screws.

[0084] like Figure 5 and Figure 12 As shown, the edge of the second cover plate 10 is provided with several third screw holes 1001, and the connecting strip 603 of the bracket 6 is provided with several fourth screw holes 6031. Screws pass through the third screw holes 1001 and the fourth screw holes 6031 to fix the second cover plate 10 to the bracket 6.

[0085] In one embodiment not shown in the figure, the second cover plate 10 is connected to the bracket 6 by a snap-fit ​​connection.

[0086] In one embodiment, the first cover plate 9 is provided with a first limiting part 902, and the first gear 7 is provided with a second limiting part 703. The first limiting part 902 and the second limiting part 703 cooperate to limit the rotation angle of the first gear 7.

[0087] In this embodiment, the first limiting part 902 and the second limiting part 703 cooperate to limit the rotation angle of the first gear 7, thereby facilitating precise control of the rotation angle of the first gear 7.

[0088] Specifically, the first limiting part 902 and the second limiting part 703 cooperate to make the first gear 7 rotate only between the first position and the second position. When the first gear 7 is in the first position, the wind deflector 5 extends, and when the first gear 7 is in the second position, the wind deflector 5 retracts.

[0089] In one embodiment, such as Figure 7 and Figure 13 As shown, the first limiting part 902 is an arc-shaped hole, and the second limiting part 703 is a protruding post that extends into the arc-shaped hole.

[0090] In this embodiment, the arc-shaped hole limits the protrusion, thereby limiting the rotation angle of the first gear 7. Specifically, when the protrusion is located at one end of the arc-shaped hole, the baffle 5 extends, and when the protrusion is located at the other end of the arc-shaped hole, the baffle 5 retracts.

[0091] In one embodiment not shown in the figure, the first limiting part 902 is a protruding post, and the second limiting part 703 is an arc-shaped hole, with the protruding post extending into the arc-shaped hole.

[0092] In one embodiment, the fixing component further includes a main body 11, a first cover plate 9 fixed to the main body 11, a drive motor 4 fixedly disposed on the main body 11 or the first cover plate 9, the main body 11 having a main air duct connected to the cold air duct 1 and the warm air duct 2, and the heating element 3 located at the air inlet of the main air duct.

[0093] In this embodiment, by placing the heating element 3 at the air inlet of the main air duct, the user cannot see the heating element 3 when the fan is working, which can improve the visual experience.

[0094] In one specific embodiment, the first cover plate 9 is fixed to the main body 11 by screws, and the drive motor 4 is fixedly disposed on the main body 11. The center of the first cover plate 9 is provided with a second mounting through hole 903. The output shaft 401 of the drive motor 4 passes through the second mounting through hole 903 and is inserted into the first connecting part 701 on the first gear 7, and is fixedly connected to the first gear 7. The second connecting part 702 on the first gear 7 passes through the second mounting through hole 903 of the bracket 6 and is inserted into the third connecting part 801 on the second gear 8, and is fixedly connected to the second gear 8.

[0095] In one embodiment, a mounting bracket 604 is provided on the outer side of the annular outer contour 602, and the heating element 3 is disposed on the mounting bracket 604 and surrounds the outer side of the annular outer contour 602.

[0096] In this embodiment, by providing a mounting bracket 604 on the outside of the annular outer contour 602, it is convenient to install and fix the heating element 3. At the same time, the heating element 3 is located on the outside of the annular outer contour 602, which can isolate the cold air duct 1 and the warm air duct 2.

[0097] In one embodiment, the heating element 3 includes multiple turns of heating wire that are evenly spaced along both the axial and radial directions.

[0098] In this embodiment, the heating element 3 includes multiple turns of heating wire evenly spaced along both the axial and radial directions, which can fully and evenly heat the air, resulting in uniform temperature of the blown-out warm air and improving the user experience.

[0099] According to an embodiment of the present invention, another aspect provides a fan including the aforementioned hot and cold air duct.

[0100] In this embodiment, the warm air duct 2 of the fan surrounds the cold air duct 1, making full use of space and reducing its volume. When warm air is needed, the heating element 3 operates, and the drive structure drives the baffle structure to extend, blocking the cold air duct 1. At this time, no air passes through the cold air duct 1 without the heating element 3, and only the warm air duct 2 blows hot air. The heat from the heating element 3 is not dissipated, resulting in excellent warming effect. When cold air is needed, the heating element 3 does not operate, and the drive structure drives the baffle structure to retract. The cold air duct 1 is in a free-flowing state, and both the warm air duct 2 and the cold air duct 1 can blow cold air normally, ensuring sufficient airflow.

[0101] In one embodiment, the heating element 3 is located at the air inlet. When the fan is working, the user cannot see the heating element 3, which can improve the visual experience.

[0102] 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 claims.

Claims

1. A hot and cold air duct, characterized in that, include: Cold air duct (1); A warm air duct (2) surrounds the cold air duct (1), and the warm air duct (2) is provided with a heating element (3). The windshield assembly includes a drive structure and a windshield structure. The windshield structure can extend or retract under the drive of the drive structure. When the windshield structure extends, the cold air duct (1) is in a blocked state. When the windshield structure retracts, the cold air duct (1) is in a flowing state. The heating and cooling air duct includes a fixed assembly, the drive structure includes a drive motor (4) fixedly mounted on the fixed assembly and a plurality of gears connected to the output shaft (401) of the drive motor (4), and the windproof structure includes a plurality of windproof plates (5) rotatably mounted on the fixed assembly. The windproof plates (5) have a meshing part (501) that meshes with the gears and can extend or retract under the drive of the gears. The fixing component includes a bracket (6), which includes a central mounting part (601), an annular outer contour (602), and multiple connecting strips (603) connecting the central mounting part (601) and the annular outer contour (602). The space between any two connecting strips (603) constitutes a cold air sub-duct. Multiple cold air sub-ducts together constitute the cold air duct (1). When the baffle (5) extends, each baffle (5) blocks the cold air sub-duct in the axial direction in a corresponding manner. When the baffle (5) retracts, the baffle (5) is located on the side of the central mounting part (601) in the axial direction. The gears are a first gear (7) and a second gear (8). The first gear (7) is located on the first side of the bracket (6) in the axial direction, and the second gear (8) is located on the second side of the bracket (6) in the axial direction. The first gear (7) and the second gear (8) are respectively meshed with a plurality of wind deflectors (5) in the circumferential direction, and the wind deflectors (5) meshing with the first gear (7) and the wind deflectors (5) meshing with the second gear (8) are alternately arranged in the circumferential direction.

2. The heating and cooling air duct according to claim 1, characterized in that, The fixing assembly also includes a first cover plate (9), which is fixed to a first side of the bracket (6), and a first gear (7) is located between the first cover plate (9) and the bracket (6). The wind deflector (5) meshing with the first gear (7) is rotatably connected to the first cover plate (9) and / or the bracket (6).

3. The hot and cold air duct according to claim 2, characterized in that, The fixing assembly also includes a second cover plate (10), which is fixed to the second side of the bracket (6). The second gear (8) is located between the second cover plate (10) and the bracket (6). The wind deflector (5) meshing with the second gear (8) is rotatably connected to the second cover plate (10) and / or the bracket (6).

4. The hot and cold air duct according to claim 2, characterized in that, The first cover plate (9) is provided with a first limiting part (902), and the first gear (7) is provided with a second limiting part (703). The first limiting part (902) and the second limiting part (703) cooperate to limit the rotation angle of the first gear (7).

5. The hot and cold air duct according to claim 4, characterized in that, The first limiting part (902) is one of an arc-shaped hole and a protruding post, and the second limiting part (703) is the other of an arc-shaped hole and a protruding post, wherein the protruding post extends into the arc-shaped hole.

6. The heating and cooling air duct according to any one of claims 2 to 5, characterized in that, The fixing component also includes a main body (11), the first cover plate (9) is fixed to the main body (11), the drive motor (4) is fixedly disposed on the main body (11) or the first cover plate (9), the main body (11) has a main air duct that communicates with the cold air duct (1) and the warm air duct (2), and the heating element (3) is located at the air inlet of the main air duct.

7. The heating and cooling air duct according to any one of claims 1 to 5, characterized in that, A mounting bracket (604) is provided on the outer side of the annular outer contour (602), and the heating element (3) is disposed on the mounting bracket (604) and surrounds the outer side of the annular outer contour (602).

8. The heating and cooling air duct according to claim 7, characterized in that, The heating element (3) includes multiple turns of heating wire that are evenly spaced along both the axial and radial directions.

9. A fan, characterized in that, include: The heating and cooling air duct according to any one of claims 1 to 8.

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