Air duct structure and hot air device

Abstract

The utility model relates to the technical field of air duct structures, in particular to an air duct structure and a hot air device, the air duct structure comprises a hollow through air duct shell and a shunting structure arranged in the air duct shell, the shunting structure is provided with a main circulation port and a plurality of secondary circulation ports, and the plurality of secondary circulation ports are circumferentially distributed at intervals around the center of the main circulation port. According to the utility model, the shunting structure for separating the airflow is arranged in the air duct structure, the airflow rushed in is separated through the main circulation port and the secondary circulation ports respectively, so that the airflow cannot be concentrated at a certain local position, and on the basis, the secondary circulation ports are distributed around the center of the main circulation port in the circumferential direction at intervals, so that the shunting effect is more uniform; the air outlet airflow can be evenly distributed in the whole air duct structure, the ideal even air outlet effect is achieved, use discomfort or potential safety hazards caused by heat concentration are avoided, and use by a user is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of air duct structure technology, specifically an air duct structure and a hot air device. Background Technology

[0002] There is a wide variety of electric heating products on the market, such as hair dryers, hot air blowers, and baking equipment, which are very convenient to use. However, the hot air channels of existing electric heating products are relatively simple in structure. In actual ventilation, the air outlet of the fan directly outputs airflow to the heating element. The airflow is not uniform and may cause the airflow to only pass through the middle of the heating element. This is not conducive to the even distribution of airflow throughout the entire air duct structure, which is not conducive to uniform heating. The heat concentration will cause local temperature rise, which may result in burns to users and a poor user experience, or even burns to the skin or ignition of dry objects in the surrounding environment, making it inconvenient for users to use.

[0003] To address the above shortcomings, we need to develop a duct structure and hot air device to meet the needs of a wide range of users. Utility Model Content

[0004] To address the aforementioned problems of uneven airflow and concentrated heat in existing hot air channels, the technical solution adopted by this utility model is as follows:

[0005] A duct structure includes a hollow, through-hole duct shell and a flow-diverting structure installed inside the duct shell. The flow-diverting structure has a main flow outlet and secondary flow outlets, and a plurality of the secondary flow outlets are arranged circumferentially around the center of the main flow outlet.

[0006] Furthermore, the interior of the air duct housing has a diversion expansion channel, the diversion structure is located inside the diversion expansion channel, the diversion expansion channel opens obliquely from the starting position a toward the air outlet direction, the inner wall of the diversion expansion channel forms an expansion angle e with the center line b of the diversion expansion channel, and the angle e ranges from 0 to 15 degrees.

[0007] Furthermore, the diversion structure includes a first base mounted on the duct housing, a fixed rib extending from the first base toward the air outlet direction, and a diversion ring mounted on the fixed rib. A plurality of the fixed ribs are arranged circumferentially around the center of the diversion ring. The main flow outlet is located in the diversion ring, and the secondary flow outlet is formed by the first base, the fixed rib, and the diversion ring.

[0008] Furthermore, the diversion ring tilts and contracts from the initial position g toward the air outlet direction, and the inner wall of the diversion ring forms a contraction angle i with the center line h of the diversion ring, the angle i being in the range of 0-30 degrees.

[0009] Furthermore, the diversion structure includes a second base installed on the duct housing, a secondary duct extending from the second base toward the air outlet direction, and a diversion end cap installed on the secondary duct. The main flow outlet is located on the diversion end cap, and the secondary flow outlet is located at the junction between the diversion end cap and the secondary duct.

[0010] Furthermore, the diversion end cap is provided with a diversion port between the main flow port and the secondary flow port, and a plurality of the diversion ports are arranged circumferentially around the center of the main flow port.

[0011] A hot air device includes a duct structure as described in any one of claims, a fan for outlet air, and a main housing for mounting the fan, the main housing being detachably connected to the duct housing to limit the installation position of the fan, the duct housing including an air inlet and an air outlet, the air inlet being located on the duct housing close to the fan, and the air outlet being located on the duct housing away from the fan.

[0012] Furthermore, the centerline m of the air duct housing is a curve, the shell wall of the air duct housing is a curved surface, and the shell wall is bent from the air inlet toward the air outlet.

[0013] Furthermore, the main unit housing includes a first clamping member and a second clamping member. The first clamping member has an elastic limiting buckle extending toward the second clamping member, and the second clamping member has a buckling protrusion for limiting the engagement position of the elastic limiting buckle. The extension direction of the elastic limiting buckle is inclined to the air outlet direction.

[0014] Furthermore, the main unit housing includes a third clamping member and a fourth clamping member. The third clamping member has a clamping and positioning through hole for the locking member to pass through, and the fourth clamping member has a clamping and positioning structure for the locking member to extend into. The clamping and positioning structure has a clamping and positioning locking hole corresponding to the position of the clamping and positioning through hole, and the center line n of the clamping and positioning locking hole is inclined to the air outlet direction.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model has a flow-dividing structure inside the air duct structure to separate the airflow. The incoming airflow is separated by the main flow inlet and the secondary flow inlet, so that it does not concentrate in a certain local position. On this basis, the secondary flow inlets are arranged circumferentially around the center of the main flow inlet, so that the flow-dividing effect is more uniform. The airflow can be evenly distributed inside the entire air duct structure, which can meet the ideal uniform air outlet effect, avoid heat concentration that may cause discomfort or safety hazards, and make it convenient for users.

[0017] 2. This utility model provides a first and second clamping component connected by elastic snap-fit, and a third and fourth clamping component connected by positioning and locking on the main housing of the hot air device. This enriches the detachable installation methods of the fan and facilitates the adaptation to different installation processes. The elastic snap-fit ​​connection method facilitates disassembly and assembly, improving the efficiency of assembly and maintenance, while the positioning and locking connection method improves the stability of the clamping connection, preventing the fan from loosening and falling off during use, thus making it convenient for users. Attached Figure Description

[0018] Figure 1 This is a perspective view of a duct structure and hot air device according to the present invention.

[0019] Figure 2 This is a perspective view of a duct structure and hot air device according to the present invention.

[0020] Figure 3 This is a three-dimensional sectional view of a duct structure and hot air device according to the present invention.

[0021] Figure 4 This is a three-dimensional sectional view of a duct structure and hot air device according to the present invention.

[0022] Figure 5 for Figure 3 A magnified view of A.

[0023] Figure 6 for Figure 4 A magnified view of B.

[0024] Figure 7 This is a diagram showing the internal structure of the air duct housing of this utility model.

[0025] Figure 8 This is the internal structure of the air duct shell of this utility model.

[0026] Figure 9 This is a perspective view of a duct structure and hot air device according to the present invention.

[0027] Figure 10 This is a three-dimensional sectional view of a duct structure and hot air device according to the present invention.

[0028] Figure 11 This is a sectional elevation view of a duct structure and hot air device according to the present invention. Detailed Implementation

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] Example 1:

[0031] like Figures 3 to 8The illustrated air duct structure includes a hollow, through-hole air duct shell 1 and a flow distribution structure 2 installed inside the air duct shell 1. The flow distribution structure 2 has a main flow outlet 21 and secondary flow outlets 22, with a plurality of secondary flow outlets 22 arranged circumferentially around the center of the main flow outlet 21.

[0032] More specifically, the duct housing 1 is a duct structure used for the airflow channel of the fan 5 installed on the hot air device. The interior of the duct housing 1 adopts a hollow through structure, and the outer shell wall 14 adopts a thin-wall design and is installed on the heating element 7 of the hot air device. The duct housing 1 has an air outlet 13 for connecting the heating element 7 and an air inlet 12 for connecting the fan 5. The heating element 7 includes a heating element and an insulating clamp for elastically holding the heating element. The side of the duct housing 1 near the air outlet 13 is detachably installed on the insulating clamp to limit the position of the heating element 7 on the duct housing 1. The fan 5 is installed on the side of the duct housing 1 near the air inlet 12 to meet the airflow output of the air supply.

[0033] More specifically, the flow divider structure 2 is a duct structure used to evenly disperse the airflow emitted by the fan 5. The flow divider structure 2 is installed inside the duct housing 1 and located between the fan 5 and the heating element 7. The flow divider structure 2 guides the direction of airflow by using a baffle and diversion method. The baffle plate of the flow divider structure 2 has a main flow opening 21 and secondary flow openings 22. The main flow opening 21 is an airflow opening located near the central axis of the flow divider structure 2, and the secondary flow openings 22 are airflow openings located between the main flow opening 21 and the shell wall 14 of the duct housing 1. There is only one main flow opening 21, while there can be several secondary flow openings 22. When gas flows, the flow divider structure 2 and the fan... The airflow between points 5 flows out through the main flow port 21 and the secondary flow port 22 respectively, achieving the effect of air diversion. On this basis, several secondary flow ports 22 are evenly spaced around the center of the main flow port 21, forming several evenly distributed flow openings. Under the wind-blocking and diversion effect of the baffle plate and several flow openings, the effect of uniform air diversion is achieved. The airflow that rushes in separately through the main flow port 21 and the secondary flow port 22 prevents the airflow from concentrating in a certain local position, and the diversion effect can be more uniform. The airflow flows evenly through the entire air duct structure, meeting the user's requirement for uniform airflow effect, avoiding heat concentration that may cause discomfort or safety hazards, and making it convenient for users to use.

[0034] In another embodiment 101 of embodiment 1, the interior of the duct housing 1 has a diversion expansion channel 11, and the diversion structure 2 is located inside the diversion expansion channel 11. The diversion expansion channel 11 is an air outlet expansion structure used to gradually expand the inner diameter of the duct structure during the air outlet process. The diversion expansion channel 11 is a channel structure that connects from the starting position a to the ending position d. The starting position a is located near the air inlet 12 of the diversion expansion channel 11, and the ending position d is located near the air outlet 13 of the diversion expansion channel 11. In this embodiment, the air outlet direction is the direction of the airflow output from the fan 5 to the heating element 7, or the air flow direction from the air inlet 12 to the air outlet 13. The diversion expansion channel 11 is inclined from the starting position a towards the air outlet direction. When the diversion expansion channel 11 is opened, the inner wall 111 of the channel forms an expansion angle e with the center line b of the diversion expansion channel 11. The center line b is a continuous line segment composed of the center of the unit cross section perpendicular to the air outlet direction of the diversion expansion channel 11. The center of the airflow direction of the diversion expansion channel 11 is close to the center line b. The expansion angle e is the acute angle formed between the intersection line of the cross section of the inner wall 111 of the channel and the center line b. The expansion angle e ranges from 0 to 15 degrees. The larger the expansion angle e, the larger the volume of the air duct structure, and the more space it needs to occupy. The smaller the expansion angle e, the smaller the distance between the shell wall 14 and the diversion structure 2, which will affect the diversion air outlet effect. Preferably, the air outlet effect is better when the expansion angle e is 3.5 degrees, 5 degrees or 7.5 degrees.

[0035] As another embodiment 102 of embodiment 101, the diversion expansion channel 11 also has a segmented expansion structure. The diversion expansion channel 11 can be divided into two or more segments. In this embodiment, taking two segments as an example, a secondary expansion position c is set between the starting position a and the ending position d. The area between the starting position a and the secondary expansion position c is called the pre-expansion extension segment, and the area between the secondary expansion position c and the ending position d is called the post-expansion extension segment. The shell wall 14 of the pre-expansion extension segment forms an acute angle f with the center line b, and the shell wall 14 of the post-expansion extension segment forms an acute angle e with the center line b. The angle range of the pre-expansion extension segment angle f is 0-5 degrees, and the angle range of the expansion angle e is 0-15 degrees. By adopting a segmented expansion structure, the air diversion effect can be optimized, and an appropriate balance can be made between the air diversion and the overall structural volume. While having a good air diversion effect, it can also reduce the external space occupied, so as to minimize the storage volume of the hot air device and the storage space occupied, making it convenient for users to use.

[0036] As another embodiment 103 of embodiment 1, such as Figures 1 to 8As shown, the air duct housing 1 can adopt a straight air outlet direction. The shell wall 14 of the air duct housing 1 adopts a straight cylindrical structure. The center line b of the air duct housing 1 is a straight line. The straight cylindrical air duct housing 1 is suitable for an air duct structure in which the air outlet port of the fan 5 is directed towards the heating element 7 for a straight air outlet.

[0037] As another embodiment 104 of embodiment 1, such as Figures 9 to 10 As shown, the air duct housing 1 can adopt a curved air outlet direction. The center line m of the air duct housing 1 is a curve. The shell wall 14 of the air duct housing 1 is a curved surface. The shell wall 14 is curved from the air inlet 12 to the air outlet 13. The curved air duct housing 1 is suitable for air duct structures where the air outlet of the fan 5 cannot be directly aligned with the heating element 7 and needs to be adapted to the external installation structure.

[0038] As another embodiment 105 of embodiment 1, such as Figure 10 and Figure 11 As shown, the heating component 7 includes a heating element 71 for heating and allowing airflow to pass through, and a conductive element 72 for the heating element 71 to conduct external circuits. The conductive element 72 contacts the electrode layers on both sides of the heating element 71 to conduct circuits and generate heat. To better stabilize the position of the clamping and pressing conductive element 72 on the heating element 71 and avoid poor contact and sparking, the air duct housing 1 includes a first clamping member 15 and a second clamping member 16 for enhancing clamping stability. One conductive element 72 is installed between the first clamping member 15 and the heating element 71, and the other conductive element 72 is installed between the second clamping member 16 and the heating element 71. To further enhance the stability of the elastic clamping, an elastic deformation member 73 is also installed between the second clamping member 16 and the conductive element 72. In this embodiment, the elastic deformation member 73 is preferably a spring.

[0039] As another embodiment 106 of embodiment 105, such as Figure 10 and Figure 11 As shown, the elastic deformable member 73 in this embodiment is an annular concave-convex elastic ring. The elastic deformable member 73 adopts a curved strip structure with the ends connected. The surface of the elastic deformable member 73 has adjacent concave curved surfaces and convex curved surfaces. The thickness of the elastic deformable member 73 is within the range of ±5mm of the thickness of the conductive member 72. The elastic deformable member 73 is located between the second clamping member 16 and the conductive member 72, so as to press the conductive member 72 to make stable contact with the heating element 71.

[0040] Example 2:

[0041] Based on Example 1, such as Figure 3 , Figure 5 and Figure 7The illustrated duct structure includes a flow-dividing structure 2 comprising a first base 31, a fixed rib 32, and a flow-dividing ring 33. The first base 31 restricts the installation position of the flow-dividing structure 2 on the duct housing 1, serving as a connecting base. The fixed rib 32 restricts the installation position of the flow-dividing ring 33 on the first base 31, serving as a support. The flow-dividing ring 33 is a gas diversion component that restricts the flow direction of the airflow from the fan 5. More specifically, the inner wall 331 of the flow-dividing ring 33 faces the outlet direction or towards the outlet direction from the initial position g. The opening 13 slopes inward from the outside and contracts. The starting position g is located near the air inlet 12 of the diversion ring 33. The main flow opening 21 is located in the hollow passage of the diversion ring 33. The intersection of the cross section of the inner wall 331 of the ring and the center line h form an acute angle of contraction angle i. The angle range of the contraction angle i is 0-30 degrees. The larger the contraction angle i is, the closer the airflow through the main flow opening 21 is to the center and the more concentrated it is. The smaller the contraction angle i is, the smaller the impact on the airflow diversion. Preferably, the air outlet effect is better when the contraction angle i is 10 degrees, 15 degrees or 20 degrees.

[0042] More specifically, the fixed ribs 32 extend from the first base 31 toward the air outlet direction. Several fixed ribs 32 are evenly spaced around the center of the diversion ring 33. Adjacent fixed ribs 32, together with the first base 31 and the diversion ring 33, form a secondary flow port 22. In this embodiment, the secondary flow port 22 is located between the diversion ring 33 and the first base 31 and between the main flow port 21 and the shell wall 14. The evenly spaced secondary flow ports 22 help to facilitate airflow diversion. In use, when the airflow output by the fan 5 flows through the diversion structure 2, the airflow is affected by the diversion ring 33 and flows to the main flow port 21 and the secondary flow port 22 respectively, forming a diversion effect with the main flow port 21 outputting the main air volume.

[0043] Example 3:

[0044] Based on Example 1, such as Figure 4 , Figure 6 and Figure 8The illustrated duct structure includes a diversion structure 2 comprising a second base 41, a secondary duct 42, and a diversion end cap 43. The second base 41 restricts the installation position of the diversion structure 2 on the duct housing 1, serving as a connecting base. The secondary duct 42 restricts the installation position of the diversion end cap 43 on the second base 41, providing a stable connection. The diversion end cap 43 is a gas diversion component used to restrict the direction of airflow diversion from the fan 5. More specifically, the inner wall 421 of the secondary duct 42 slopes inward from the initial position j towards the air outlet direction or towards the air outlet 13, serving to… The initial position j is located near the air inlet 12 of the secondary air duct 42, the diversion end cover 43 is located near the air outlet 13 of the secondary air duct 42, the main flow outlet 21 is located at the hollow through-hole of the diversion end cover 43, and the intersection of the cross section of the inner wall 421 of the air duct and the center line k forms an acute angle L of contraction. The angle range of the contraction angle L is 0-15 degrees. The larger the contraction angle L is, the closer the airflow through the diversion end cover 43 is to the center and the more concentrated it is. The smaller the contraction angle L is, the more uniform the effect of airflow diversion is. Preferably, the air outlet effect is better when the contraction angle L is 3.5 degrees, 5 degrees or 7.5 degrees.

[0045] More specifically, the secondary flow outlet 22 is located at the junction (corner) between the secondary air duct 42 and the diversion end cover 43. The end cover surface of the diversion end cover 43 is perpendicular to the center line k or perpendicular to the air outlet direction. Several secondary flow outlets 22 are evenly spaced around the center of the main flow outlet 21. In this embodiment, the secondary flow outlets 22 are located between the main flow outlet 21 and the shell wall 14. The evenly spaced secondary flow outlets 22 help to facilitate the diversion of airflow. When in use, the airflow output by the fan 5 flows through the diversion structure 2. The airflow is affected by the secondary air duct 42 and gathers towards the diversion end cover 43 before flowing out of the main flow outlet 21 and the secondary flow outlet 22 respectively, forming a diversion effect of evenly diverting the airflow.

[0046] As another embodiment 301 of embodiment 3, the diversion end cover 43 is provided with a diversion port 44 between the main flow port 21 and the secondary flow port 22. Several diversion ports 44 are arranged circumferentially around the center of the main flow port 21. The structure of adding diversion ports 44 can further increase the opening of air flow, making the air diversion more uniform, reducing the influence of the baffle on the air diversion, reducing the interval distance between the air diversion openings, and improving the air diversion effect.

[0047] Example 4:

[0048] like Figures 1 to 8The hot air device shown includes the air duct structure described in any of the above embodiments, a fan 5 for air outlet, and a main housing 6 for mounting the fan 5. The fan 5 is the air source of the hot air device, drawing in or sucking in outside air, which is then directed to the air duct structure via the fan 5's outlet port. The main housing 6 is a clamping connection housing for mounting the fan 5 onto the air duct housing 1. The main housing 6 is detachably connected to the air duct housing 1 to limit the installation position of the fan 5. The air duct housing 1 includes an air inlet 12 and an air outlet 13. The air inlet 12 is located near the fan 5, and the air outlet 13 is located away from the fan 5. In use, the fan 5 is started and outputs airflow toward the interior of the air duct housing 1. When the air flows through the diversion structure 2, it is affected by the diversion structure 2, causing the air to flow evenly from the diversion structure 2 to the air outlet 13, achieving a uniform airflow effect.

[0049] Example 5:

[0050] Based on Example 4, such as Figure 1 and Figure 9 The hot air device shown includes a main unit housing 6 comprising a first clamping member 61 and a second clamping member 62. In this embodiment, the first clamping member 61 and the second clamping member 62 are connected by an elastic clamping connection for assembling, disassembling, and clamping the fan 5. The first clamping member 61 has an elastic limiting buckle 611 extending toward the second clamping member 62. The root of the elastic limiting buckle 611 extends from the first clamping member 61 near the second clamping member 62, forming a U-shaped buckle bracket. The extension direction of the elastic limiting buckle 611 is inclined to the air outlet direction. Preferably, the buckling effect is better when the extension direction of the elastic limiting buckle 611 is perpendicular to the air outlet direction. The end of the U-shaped buckle bracket is the corner of the U-shaped structure. The second clamping member 62 has a buckle for limiting the engagement position of the elastic limiting buckle 611. The protrusion 621 extends outward from the outer surface of the second clamping member 62. The position of the protrusion 621 near the first clamping member 61 adopts a sloping structure to facilitate the smooth lifting of the end of the elastic limiting buckle 611 during elastic clamping, allowing it to slide into the protrusion 621 away from the limiting plane of the first clamping member 61. The protrusion 621 is engaged inside the U-shaped buckle bracket, and the limiting plane restricts the disengagement of the U-shaped buckle bracket, achieving the effect of limiting the installation position. The main housing 6 adopts a split, detachable connection disassembly and assembly structure, which facilitates the installation and disassembly of the fan 5, improves the efficiency of production assembly and subsequent maintenance, and achieves convenient and quick disassembly and assembly without the need for locking accessories. The production precision of elastic clamping can be relatively lower, which can reduce production difficulty and reduce production costs.

[0051] As another embodiment 501 of embodiment 5, the first clamping member 61 may be provided with at least two elastic limiting buckles 611 spaced apart along the air outlet direction, and the second clamping member 62 may be provided with at least two buckle protrusions 621 spaced apart along the air outlet direction. The forming position of the buckle protrusions 621 corresponds to the forming position and buckling distance of the elastic limiting buckles 611, so as to enhance the stability of the elastic clamping between the first clamping member 61 and the second clamping member 62 and reduce the possibility of the first clamping member 61 and the second clamping member 62 becoming loose and falling off.

[0052] As another embodiment 502 of embodiment 5, the first clamping member 61 may be symmetrically provided with at least two elastic limiting buckles 611 along the left and right sides of the air outlet direction, and the first clamping member 61 may be symmetrically provided with at least two buckle protrusions 621 along the left and right sides of the air outlet direction. The forming position of the buckle protrusions 621 corresponds to the forming position and buckling distance of the elastic limiting buckles 611, so as to enhance the stability of the elastic clamping between the first clamping member 61 and the second clamping member 62, avoid uneven force caused by unilateral elastic clamping, and reduce the possibility of the first clamping member 61 and the second clamping member 62 loosening and falling off.

[0053] Example 6:

[0054] Based on Example 4, such as Figure 2 The hot air device shown includes a main housing 6 comprising a third clamping member 63 and a fourth clamping member 64. In this embodiment, the third clamping member 63 and the fourth clamping member 64 are connected by a positioning and locking connection (threaded locking, snap-locking, or pin locking) for disassembly, assembly, and clamping of the fan 5. The third clamping member 63 has a clamping and positioning through hole 631 through which a locking member (which may be a screw, bolt, pin, wedge pin, snap-locking rod, etc.) passes. The clamping and positioning through hole 631 is inclined to or perpendicular to the air outlet direction and is located near the middle of the length of the third clamping member 63. The fourth clamping member 64 has a clamping and positioning structure 641 into which the locking member extends. The clamping and positioning structure 641 has... The clamping and positioning locking hole corresponds to the position of the clamping and positioning through hole 631. The clamping and positioning locking hole can be a blind hole or a through hole. The opening direction of the clamping and positioning locking hole corresponds to the hole position of the clamping and positioning through hole 631. The center line n of the clamping and positioning locking hole is inclined to the air outlet direction and coaxial with the clamping and positioning through hole 631. In use, the locking member is passed through the clamping and positioning through hole 631 and inserted into the clamping and positioning locking hole to implement the positioning and locking connection (threaded locking, snap locking or pin locking) to lock the installation position between the third clamping member 63 and the fourth clamping member 64. The positioning and locking connection makes the third clamping member 63 and the fourth clamping member 64 clamp the fan 5, restrict the position of the fan 5 on the hot air device, and improve the stability of the fan 5 installation.

[0055] As another embodiment 601 of embodiment 6, the third clamping member 63 may be provided with at least two clamping and positioning through holes 631 spaced apart along the air outlet direction, and the fourth clamping member 64 may be provided with at least two clamping and positioning structures 641 spaced apart along the air outlet direction. The central axis of the clamping and positioning locking hole is coaxial with the clamping and positioning through hole 631 to enhance the stability of the positioning and locking connection between the third clamping member 63 and the fourth clamping member 64, and further improve the tightness of the stable clamping of the fan 5 between the third clamping member 63 and the fourth clamping member 64.

[0056] As another embodiment 602 of embodiment 6, the third clamping member 63 may be symmetrically provided with at least two clamping and positioning through holes 631 along the left and right sides of the air outlet direction, and the third clamping member 63 may be symmetrically provided with at least two clamping and positioning structures 641 along the left and right sides of the air outlet direction. The central axis of the clamping and positioning locking hole is coaxial with the clamping and positioning through hole 631 to enhance the stability of the elastic clamping between the third clamping member 63 and the fourth clamping member 64, avoid uneven force due to unilateral locking, reduce the degree of deformation caused by uneven force on the third clamping member 63 and the fourth clamping member 64, and further improve the tightness of the stable clamping of the fan 5 between the third clamping member 63 and the fourth clamping member 64.

[0057] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A duct structure, characterized in that: It includes a hollow, through-hole air duct shell (1) and a flow divider structure (2) installed inside the air duct shell (1). The flow divider structure (2) has a main flow port (21) and a secondary flow port (22). Several of the secondary flow ports (22) are arranged circumferentially around the center of the main flow port (21).

2. The air duct structure according to claim 1, characterized in that: The air duct housing (1) has a diversion expansion channel (11) inside. The diversion structure (2) is located inside the diversion expansion channel (11). The diversion expansion channel (11) opens at an angle from the starting position a toward the air outlet direction. The inner wall (111) of the diversion expansion channel (11) and the center line b of the diversion expansion channel (11) form an expansion angle e. The angle e ranges from 0 to 15 degrees.

3. The air duct structure according to claim 2, characterized in that: The diversion structure (2) includes a first base (31) installed on the air duct housing (1), a fixed rib (32) extending from the first base (31) toward the air outlet direction, and a diversion ring (33) installed on the fixed rib (32). A plurality of the fixed ribs (32) are arranged circumferentially around the center of the diversion ring (33). The main flow outlet (21) is located in the diversion ring (33). The secondary flow outlet (22) is formed by the first base (31), the fixed rib (32) and the diversion ring (33).

4. The air duct structure according to claim 3, characterized in that: The diversion ring (33) tilts and contracts from the starting position g toward the air outlet direction. The inner wall (331) of the diversion ring (33) forms a contraction angle i with the center line h of the diversion ring (33). The angle range of the contraction angle i is 0-30 degrees.

5. The air duct structure according to claim 2, characterized in that: The diversion structure (2) includes a second base (41) installed on the air duct housing (1), a secondary air duct (42) extending from the second base (41) toward the air outlet direction, and a diversion end cap (43) installed on the secondary air duct (42). The main flow port (21) is located on the diversion end cap (43), and the secondary flow port (22) is located at the junction between the diversion end cap (43) and the secondary air duct (42).

6. The air duct structure according to claim 5, characterized in that: The diversion end cap (43) has a diversion port (44) between the main flow port (21) and the secondary flow port (22), and a plurality of the diversion ports (44) are arranged circumferentially around the center of the main flow port (21).

7. A hot air device, characterized in that: Includes the air duct structure as described in any one of claims 1-6, a fan (5) for air outlet, and a main housing (6) for mounting the fan (5), the main housing (6) being detachably connected to the air duct housing (1) to limit the installation position of the fan (5), the air duct housing (1) including an air inlet (12) and an air outlet (13), the air inlet (12) being located on the air duct housing (1) near the fan (5), and the air outlet (13) being located on the air duct housing (1) away from the fan (5).

8. The hot air device according to claim 7, characterized in that: The centerline m of the air duct housing (1) is a curve, and the shell wall (14) of the air duct housing (1) is a curved surface. The shell wall (14) is bent from the air inlet (12) toward the air outlet (13).

9. The hot air device according to claim 7, characterized in that: The main unit housing (6) includes a first clamping member (61) and a second clamping member (62). The first clamping member (61) has an elastic limiting buckle (611) extending toward the second clamping member (62). The second clamping member (62) has a buckling protrusion (621) for limiting the engagement position of the elastic limiting buckle (611). The extension direction of the elastic limiting buckle (611) is inclined to the air outlet direction.

10. The hot air device according to claim 7, characterized in that: The main housing (6) includes a third clamping member (63) and a fourth clamping member (64). The third clamping member (63) has a clamping and positioning through hole (631) through which a locking member passes. The fourth clamping member (64) has a clamping and positioning structure (641) into which a locking member extends. The clamping and positioning structure (641) has a clamping and positioning locking hole corresponding to the position of the clamping and positioning through hole (631). The center line n of the clamping and positioning locking hole is inclined to the air outlet direction.

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