Blowing device

Abstract

The utility model discloses a blowing device, and relates to the technical field of fan equipment, the blowing device comprises an air outlet cylinder, a fixing piece and a fan assembly, an accommodating cavity is formed in the air outlet cylinder, and two ends of the air outlet cylinder are respectively provided with a first air inlet and an air outlet which are communicated with the accommodating cavity; the fixing piece is arranged in the containing cavity, and supporting guide blades connected with the inner wall of the air outlet barrel are arranged on the periphery of the fixing piece. The fan assembly comprises a fan, a first fan blade and a second fan blade, the first fan blade is arranged between the fixing piece and the first air inlet, the second fan blade is arranged between the fixing piece and the air outlet, and the fan is in transmission connection with the first fan blade and the second fan blade; the air outlet barrel is further provided with an overflowing cavity and an overflowing opening communicated with the overflowing cavity and the containing cavity, the overflowing opening is formed in the side, back to the air outlet, of the second fan blade, and a second air inlet communicated with the overflowing cavity is formed in the peripheral side of the air outlet barrel. According to the technical scheme, small-size high-speed blowing of the blowing device is achieved, and practicability and reliability of the blowing device are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fan equipment technical field, especially a kind of hair dryer. BACKGROUND

[0002] In related art, the hair dryer such as fan, hair dryer can generally adopt the fan of larger power or the air outlet structure of larger structure size to realize the high wind speed hair-drying effect of hair dryer, so that hair dryer can better meet the use demand of user.

[0003] However, the size of air outlet structure is larger, which leads to the increase of overall volume of hair dryer, is not convenient for transportation and use of hair dryer, and affects the convenience of hair dryer;And the production cost of hair dryer using high-power fan is relatively high, and the energy consumption is large, which reduces the practicability of hair dryer. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of hair dryer, to improve the air outlet structure of hair dryer, so that hair dryer can realize high wind speed hair-drying under smaller structure size, enhance the hair-drying effect of hair dryer, further improve the practicability and reliability of hair dryer.

[0005] To achieve the above object, the hair dryer provided by the utility model includes air outlet barrel, fixing part and fan assembly, the air outlet barrel is formed with accommodating cavity, and the two ends of the air outlet barrel are respectively provided with first air inlet and air outlet, which are communicated with the accommodating cavity;The fixing part is arranged in the accommodating cavity, and the outer periphery of the fixing part is provided with support guide vane connected with the inner wall of the air outlet barrel;The fan assembly is arranged in the accommodating cavity, and the fan assembly includes fan, first fan blade and second fan blade, the first fan blade is arranged between the fixing part and the first air inlet, the second fan blade is arranged between the fixing part and the air outlet, and the fan is connected to the fixing part and is in transmission connection with the first fan blade and the second fan blade. Wherein, the air outlet barrel is also provided with overflow cavity and overflow port communicated with the overflow cavity and the accommodating cavity, the overflow port is arranged on the side of the second fan blade opposite to the air outlet, and the circumferential side of the air outlet barrel is provided with second air inlet communicated with the overflow cavity.

[0006] In an embodiment, the rotation radius of the first fan blade is defined as R1, the rotation radius of the second fan blade is defined as R2, and the distance between the end of the support guide vane opposite to the fixing part and the rotation center axis of the fan is defined as R3, wherein R1

[0007] In an embodiment, the fixing member is provided with a mounting groove on the side facing the air outlet, and is provided with an avoiding hole communicating with the mounting groove on the side facing the first air inlet; at least part of the structure of the fan is mounted and fixed in the mounting groove, and the fan is provided with a first shaft section and a second shaft section at two ends respectively, the first shaft section passes through the avoiding hole to connect the first fan blade, and the second shaft section connects the second fan blade.

[0008] In an embodiment, the fixing member is provided with an arc-shaped flow guide surface on the side facing the first air inlet, and the avoiding hole is arranged on the arc-shaped flow guide surface. And / or, the fan is provided with a control circuit board, the control circuit board is sleeved on the outer periphery of the fan and arranged in the mounting groove.

[0009] In an embodiment, the air outlet cylinder is further provided with an air inlet grille and an air outlet grille, the air inlet grille is connected to one end of the air outlet cylinder and covers the first air inlet, and the air outlet grille is connected to the other end of the air outlet cylinder and covers the air outlet.

[0010] In an embodiment, the air inlet grille is detachably connected to the air outlet cylinder. And / or, the air outlet grille is detachably connected to the air outlet cylinder. And / or, the air inlet grille is sleeved on one end of the air outlet cylinder, the outer periphery of the air inlet grille is spaced from the outer periphery of the air outlet cylinder to form the flow passage, and the circumferential side of the air inlet fan blade is provided with the second air inlet.

[0011] In an embodiment, the first fan blade comprises an inner hub, an outer hub, at least two first blades and at least two second blades, the inner hub is drivingly connected with the fan; the outer hub is coaxially arranged with the inner hub and sleeved on the outer periphery of the inner hub, and a flow passage is formed between the outer hub and the inner hub; at least two first blades are spaced apart and connected to the outer periphery of the outer hub; at least two second blades are spaced apart and arranged in the flow passage and connected with the outer hub and the inner hub.

[0012] In an embodiment, the outer hub comprises a first wind gathering ring and a second wind gathering ring, the first blades are connected to the outer periphery of the first wind gathering ring; the second wind gathering ring is arranged in the first wind gathering ring, one end of the second wind gathering ring is connected to the inner wall of the first wind gathering ring, and the second blades are connected with the inner hub and the second wind gathering ring; the outer periphery of the second wind gathering ring is arranged at an angle with the inner wall of the first wind gathering ring, and the width of the second wind gathering ring is configured to gradually increase in the direction from the first air inlet to the air outlet.

[0013] In an embodiment, the support guide vane is formed with a flow guide slope on the side facing the first fan blade.

[0014] In an embodiment, the support guide blade comprises a first support plate and a second support plate, a projection of the first support plate on the fixing member is arranged at an angle with the center axis of rotation of the fan assembly, and the first support plate is formed as the guide slope towards one side of the first fan blade; the second support plate is connected to one side of the first support plate and arranged at an angle with the first support plate, and the first support plate and the second support plate enclose the lightening groove.

[0015] In an embodiment, the outer periphery of the fixing member is provided with a first wire passing hole communicating with the mounting groove, and the outer periphery of the air duct is provided with a second wire passing hole communicating with the lightening groove; the fan is provided with a connecting cable, the connecting cable is arranged in the first wire passing hole and the second wire passing hole, and partially accommodated in the lightening groove.

[0016] The technical scheme of the utility model discloses a first air inlet is arranged at one end of the air outlet duct, a second air inlet is arranged at the lateral side of the air outlet duct, the fan assembly can drive the airflow to blow from the first air inlet along the fan rotating shaft towards the air outlet, the airflow at the lateral side of the air outlet duct can pass through the flow cavity and the flow port to enter the containing cavity from the second air inlet, the air inflow of the flow port can eliminate the vortex formed between the second fan blade and the inner wall of the air outlet duct, the wind loss of the airflow in the containing cavity is reduced, the wind noise generated by the blowing device is reduced, the blowing device can realize better blowing effect under the action of smaller size and lower fan power, and the practicability and structural reliability of the blowing device are improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0018] Figure 1 The structural schematic diagram of the blowing device of an embodiment provided by the utility model is shown in the figure.

[0019] Figure 2 The structural exploded view of the blowing device of an embodiment of Figure 1

[0020] Figure 3 The partial sectional schematic view of the blowing device of an embodiment of Figure 1

[0021] ​​Figure 4 partial cross-sectional view of another embodiment of the hair dryer; Figure 1

[0022] Figure 5 partial cross-sectional view of another embodiment of the hair dryer; Figure 1

[0023] Figure 6 partial cross-sectional view of another embodiment of the hair dryer; Figure 5

[0024] Figure 7 partial cross-sectional view of another embodiment of the hair dryer; Figure 1

[0025] Figure 8 partial cross-sectional view of another embodiment of the hair dryer; Figure 7

[0026] Figure 9 partial cross-sectional view of another embodiment of the hair dryer; Figure 1

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 100, hair dryer; 10, air outlet tube; 11, accommodating cavity; 13, air inlet grille; 15, air outlet grille; 17, second wiring hole; 19, flow passage; 191, support rib; 30, fixing member; 31, support vane; 311, first support plate; 313, second support plate; 315, weight-reducing groove; 317, flow guide slope; 33, mounting groove; 35, arc-shaped flow guide surface; 37, first wiring hole; 50, fan assembly; 51, fan; 511, first shaft section; 513, second shaft section; 515, control circuit board; 53, first fan blade; 531, inner hub; 5311, flow guide part; 5313, connecting part; 5315, air inlet flow passage; 533, outer hub; 5331, first air collecting ring; 5333, second air collecting ring; 535, first blade; 537, second blade; 55, second fan blade.

[0029] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be apparently and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the present application. ​​​​​​

[0031] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between components in a certain specific posture, if the specific posture changes, the directionality indication also changes accordingly.

[0032] In addition, if the embodiments of the utility model have descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the protection scope required by the utility model.

[0033] In the related art, the blowing device such as fan, hair dryer, etc. can usually use the fan with large power or the air outlet structure with large structure size to realize the high wind speed blowing effect of the blowing device, so that the blowing device can better meet the use demand of the user. However, the large size of the air outlet structure will lead to the increase of the overall volume of the blowing device, which is not convenient for the transportation and use of the blowing device, and affects the convenience of the blowing device; and the blowing device using the high-power fan has high production cost and large energy consumption, which reduces the practicability of the blowing device. In view of the above problems, the utility model provides a blowing device 100.

[0034] Please refer to Figures 1 to 9In an embodiment of the utility model, this blowing device 100 includes air -out pipe 10, fixed part 30 and fan assembly 50, form having accommodation cavity 11 in air -out pipe 10, and the both ends of air -out pipe 10 are equipped with the first air inlet and air outlet of intercommunication accommodation cavity 11 respectively, fixed part 30 is located in accommodation cavity 11, and the periphery of fixed part 30 is equipped with the support guide vane 31 of connecting air -out pipe 10 inner wall, fan assembly 50 is located in the accommodation cavity, and fan assembly 50 includes fan 51, first fan blade 53 and second fan blade 55, and first fan blade 53 is located between fixed part 30 and the first air inlet, and fan 51 is connected to fixed part 30, and is transmission connection with first fan blade 53 and second fan blade 55, air -out pipe 10 is also equipped with overflow chamber 19 and the overflow port of intercommunication overflow chamber 19 and accommodation cavity 11, and the overflow port is located in the side of second fan blade 55 facing away from the air outlet, and the lateral side of air -out pipe 10 is equipped with the second air inlet of intercommunication overflow chamber 19.

[0035] It can be understood that blowing device 100 can drive first fan blade 53 and second fan blade 55 to rotate in air -out pipe 10 by using fan assembly 50, so that fan assembly 50 can disturb the air in accommodation cavity 11 to generate airflow, which can drive the air in the environment to continuously enter accommodation cavity 11 from the first air inlet, and make the air form airflow under the action of fan assembly 50 and blow out from the air outlet, to ensure the blowing effect of blowing device 100.

[0036] In the application, fixed part 30 can be arranged at the central region of accommodation cavity 11, and by using support guide vane 31 to stably arrange fixed part 30 in accommodation cavity 11, the airflow can flow through the gaps between the multiple spaced support guide vanes 31 in accommodation cavity 11, reducing the obstruction of fixed part 30 to the airflow, and ensuring the stable and reliable blowing of blowing device 100. At this time, by installing fan 51 in mounting groove 33 of fixed part 30, the fan 51 can have a single shaft structure penetrating through the fan 51, so that the shaft structure can protrude from both ends of the fan 51 to form first shaft segment 511 and second shaft segment 513, which can rotate synchronously when the fan 51 is powered on. By arranging first fan blade 53 between fixed part 30 and the first air inlet, and arranging second fan blade 55 between fixed part 30 and the air outlet, at this time, first shaft segment 511 can pass through the avoidance hole of arc flow guide surface 35 and groove bottom wall of mounting groove 33 to connect first fan blade 53, and second shaft segment 513 can connect second fan blade 55 between fixed part 30 and the air outlet, so that fan assembly 50 can drive first fan blade 53 and second fan blade 55 to rotate synchronously in accommodation cavity 11, which is conducive to better disturbing the air entering accommodation cavity 11 by using two fan blades, so that the airflow formed by the air can have a greater flow rate, and thus better realize the high-speed blowing effect of blowing device 100.

[0037] In addition, it should be noted that the structure design of the fan assembly 50 in the present application is not limited to the above-mentioned manner. The fan 51 can also be connected to the first fan blade 53 and the second fan blade 55 by using a coaxial device to drive the first fan blade 53 and the second fan blade 55. Alternatively, the hair dryer 100 can also be provided with two independent fan units. The first fan blade 53 and the second fan blade 55 are driven independently by the two fan units, which can realize the independent rotation of the first fan blade 53 and the second fan blade 55 in the accommodating cavity 11, and is conducive to achieving better blowing effect of the fan assembly 50 in the hair dryer 100. Of course, there are many transmission connection modes between the fan 51 and the first fan blade 53 and the second fan blade 55, and the present application does not limit this as long as it can ensure the stable driving effect of the fan 51 on the first fan blade 53 and the second fan blade 55.

[0038] In the above-mentioned embodiment, the arc-shaped flow guide surface 35 is formed on the side of the fixing member 30 facing the first air inlet. In this embodiment, the arc-shaped flow guide surface 35 is formed by setting a conical circular truncated cone on the side of the fixing member 30 facing the first air inlet, and the outer side wall of the conical circular truncated cone forms the arc-shaped flow guide surface 35. Alternatively, part of the outer side wall of the fixing member 30 is inclinedly arranged towards the first shaft section 511, and then part of the outer side wall of the fixing member 30 forms the arc-shaped flow guide surface 35. Under the action of the arc-shaped flow guide surface 35, the air flow formed after the air passing through the first fan blade 53 is disturbed can flow smoothly along the arc-shaped flow guide surface 35 to the second fan blade 55, realizing the flow guiding effect of the air inlet flow, which is conducive to better reducing the attenuation of the air flow speed and reducing the noise generated by the turbulence between the first fan blade 53 and the second fan blade 55, and further improving the practicability and reliability of the hair dryer 100.

[0039] And by setting the overflow cavity 11 in the air outlet barrel 10, and setting the overflow port in the air outlet barrel 10 to communicate with the overflow cavity 19, the overflow port is arranged opposite to the side of the second fan blade 55 facing away from the air outlet, so that the second air outlet on the side of the air outlet barrel 10 is communicated with the overflow cavity 19 to intake air, so that under the disturbance of the fan assembly 50, the air in the environment can be stably driven into the overflow cavity 19, and then flows into the containing cavity 11 through the overflow port and the overflow cavity 19, which is beneficial to the air inlet of the hair dryer 100 from one end and the side of the air outlet barrel 10, and is beneficial to better increasing the air inlet flow of the hair dryer 100, so that the hair dryer 100 can achieve better blowing effect, and meet the practical needs of the user. In addition, by arranging the overflow port on the side of the second fan blade 55 facing away from the air outlet, the airflow discharged from the overflow port can flow through the gap between the edge of the second fan blade 55 and the inner wall of the air outlet barrel 10, which is beneficial to breaking the vortex formed between the edge of the second fan blade 55 and the inner wall of the air outlet barrel 10 by using part of the airflow, effectively reducing the wind loss of the airflow in the containing cavity 11, and at the same time, the vortex noise can be reduced to a certain extent, thereby improving the blowing effect and practicability of the hair dryer 100.

[0040] Therefore, the technical scheme of the present application sets the first air inlet at one end of the air outlet barrel 10, and sets the second air inlet on the side of the air outlet barrel 10, so that the airflow driven by the fan assembly 50 can be blown from the first air inlet along the rotating shaft of the fan 51 towards the air outlet, and the airflow on the side of the air outlet barrel 10 can enter the containing cavity 11 through the overflow port and the overflow cavity 19, which is beneficial to better increasing the air inlet flow of the hair dryer 100, so that the hair dryer 100 can achieve better blowing effect with greater wind power, and the airflow flowing into the overflow port can eliminate the vortex formed between the second fan blade 55 and the inner wall of the air outlet barrel 10, thereby better reducing the wind loss of the airflow in the containing cavity 11, reducing the wind noise generated by the hair dryer 100, so that the hair dryer 100 can achieve better blowing effect under the action of smaller size and lower fan power, thereby improving the practicability and structural reliability of the hair dryer 100.

[0041] Referring to Figure 7 and Figure 8 In the embodiment of the present application, the rotating radius of the first fan blade 53 is defined as R1, the rotating radius of the second fan blade 55 is defined as R2, and the distance between the end of the support guide vane 31 facing away from the fixed part 30 and the rotating center axis of the fan 51 is defined as R3, wherein R1 < R3, and R2 > R3.

[0042] In the embodiment, the area in which the accommodating cavity 11 accommodates the fixing member 30 can be configured to have a smaller width than the area in which the accommodating cavity 11 accommodates the second fan blade 55, so that the rotating radius R2 of the second fan blade 55 is greater than the distance R3 between the support guide blade 31 and the central axis of the fixing member 30, so that the hair dryer 100 can achieve a better blowing effect by using the second fan blade 55 with a larger size, and the blowing power of the hair dryer 100 can be better increased. At the same time, the rotating radius R1 of the first fan blade 53 can be configured to be smaller than the distance R3 between the support guide blade 31 and the central axis of the fixing member 30; at this time, under the action of the structure size, the airflow flowing from the first air inlet to the air outlet in the accommodating cavity 11 can first disturb the airflow to flow towards the fixing member 30, and the length of the first fan blade 53 is smaller than the length of the support guide blade 31, and the length of the second fan blade 55 is greater than the length of the support guide blade 31, so that the airflow gradually diffuses in the air outlet barrel 10, the airflow flows more smoothly, the airflow is less disturbed, the air pressure and air flow of the airflow are effectively increased, the noise generated during the operation of the hair dryer 100 is better reduced, and the airflow flowing from the fixing member 30 to the air outlet is effectively diffused to increase the flow rate and wind power of the airflow, so that the hair dryer 100 can achieve a better blowing effect. In addition, the combined structure design is also beneficial to the more convenient production and processing of the air outlet barrel 10, facilitates the integral forming and demolding of the air outlet barrel 10, effectively reduces the production difficulty of the air outlet device 100, and further improves the practicability and structural reliability of the hair dryer 100.

[0043] Referring to Figure 3 and Figure 5 In the embodiment of the utility model, define the area between the first air inlet and the fixing member 30 of the accommodating cavity 11 as the first air chamber, and the cross-sectional width of the first air chamber is configured to gradually decrease along the air outlet direction.

[0044] In the embodiment, by configuring the cross-sectional width of the first air chamber of the accommodating cavity 11 between the first air inlet and the fixing member 30 to gradually decrease along the air outlet direction, the airflow disturbed by the fan assembly 50 can achieve a better converging effect when flowing from the first air inlet to the fixing member 30, which is beneficial to better increasing the wind pressure and wind speed of the airflow, so that the hair dryer 100 can achieve a better blowing effect.

[0045] In addition, in some embodiments, the overflow port can be arranged around the fixing member 30, and the overflow port can be arranged in a ring shape surrounding the fixing member 30, or the overflow port can be arranged in a ring shape with a gap surrounding the fixing member 30, so as to ensure the stable structure of the hair dryer 100. At this time, the air outlet barrel 10 can be provided with a plurality of support ribs 191 at the overflow port, so that the air outlet barrel 10 can better ensure the stable arrangement of the overflow port by using the support ribs 191, and further improve the structural stability and reliability of the hair dryer 100.

[0046] In some embodiments, by arranging the fixing member 30 in the accommodating cavity 11 of the air outlet barrel 10, and mounting the fan 51 on the fixing member 30, and connecting the first shaft section 511 and the second shaft section 513 at both ends of the fan 51 to the first fan blade 53 and the second fan blade 55 respectively, the hair dryer 100 can drive the two fan blades to rotate synchronously by using the fan 51, so as to better disturb the air in the accommodating cavity 11, and better improve the flow rate of the generated airflow under the cooperation of the first fan blade 53 and the second fan blade 55, so that the hair dryer 100 can generate airflow with a higher flow rate by using the fan assembly 50 under the action of smaller driving power, and it is beneficial to form high-speed airflow in the air outlet barrel 10 with smaller size, so as to better reduce the overall structural size of the hair dryer 100, and improve the portability of the hair dryer 100. At the same time, by forming the arc-shaped flow guide surface 35 on the side of the fixing member 30 facing the first air inlet, the turbulence of the airflow disturbed by the first fan blade 53 can be reduced under the guiding action of the arc-shaped flow guide surface 35, which is beneficial to better reduce the attenuation of the airflow flow rate, and at the same time, a certain noise reduction effect can be achieved, which is beneficial to better realize the high-speed blowing effect of the hair dryer 100, and further improve the practicability and reliability of the hair dryer 100.

[0047] Referring to Figure 2 , Figure 3 and Figure 5 In the embodiments of the present application, the air outlet barrel 10 is further provided with an air inlet grille 13 and an air outlet grille 15. The air inlet grille 13 is connected to one end of the air outlet barrel 10 and covers the first air inlet. The air outlet grille 15 is connected to the other end of the air outlet barrel 10 and covers the air outlet.

[0048] In the embodiment, by arranging the air inlet grille 13 and the air outlet grille 15 at the first air inlet and the air outlet of the air outlet cylinder 10 respectively, the air inlet grille 13 and the air outlet grille 15 can prevent the user from touching the first fan blade 53 and the second fan blade 55 by mistake during the operation of the hair dryer 100, and can avoid that some sundries in the environment enter the accommodating cavity 11 and collide with the first fan blade 53 and the second fan blade 55 to damage the first fan blade 53 and the second fan blade 55, so as to realize the protection of the first fan blade 53 and the second fan blade 55 by the hair dryer 100, and further improve the structural stability and reliability of the hair dryer 100.

[0049] In addition, in some embodiments, in order to meet the size setting that the sizes of the first fan blade 53 and the second fan blade 55 are greater than the sizes of the fixing member 30 and the support guide vane 31, and meet the structure taper setting of the air outlet cylinder 10 between the first air inlet and the fixing member 30, the air outlet cylinder 10 can adopt a structure with a middle recess, and at this time, the air inlet grille 13 can be arranged in a cover structure, so as to be sleeved on one end of the air outlet cylinder 10, so that the air outlet cylinder 10 can realize a more regular structure setting, which is beneficial to make the hair dryer 100 more beautiful. At the same time, the air inlet grille 13 sleeved on the air outlet cylinder 10 can make the second air inlet arranged directly on the air inlet grille 13, and make the outer periphery of the air inlet grille 13 and the outer periphery of the air outlet cylinder 10 spaced to form the flow cavity 19, which is beneficial to make the air outlet cylinder 10 realize a more simple structure design, and further improve the practicability and reliability of the hair dryer 100.

[0050] Referring to Figure 2 and Figure 3 In the embodiment of the utility model, the air inlet grille 13 is detachably connected to the air outlet cylinder 10. And / or, the air outlet grille 15 is detachably connected to the air outlet cylinder 10.

[0051] In the embodiment, the air inlet grille 13 can be provided with external threads or clamping grooves and the like on the outer circumferential side, and the air outlet cylinder 10 can be provided with internal threads and clamping protrusions and the like on the inner wall of the portion close to the first air inlet, so that the outer circumferential side of the air inlet grille 13 and the inner wall of the air outlet cylinder 10 can be fixed by thread cooperation or clamping cooperation and the like. Alternatively, the air inlet grille 13 can be provided with a sleeve ring, which can be provided with a size corresponding to the end portion of the air outlet cylinder 10 provided with the first air inlet, so that the sleeve ring can be sleeved on the end portion of the air outlet cylinder 10. At this time, the inner wall of the sleeve ring can be provided with internal threads and clamping protrusions and the like, and the outer wall of the air outlet cylinder 10 can be provided with external threads or clamping grooves and the like on the outer circumferential side of the end portion, so that the inner wall of the sleeve ring of the air inlet grille 13 and the outer wall of the air outlet cylinder 10 can be fixed by thread cooperation or clamping cooperation and the like. In this way, the air inlet grille 13 and the air outlet cylinder 10 can be conveniently disassembled and assembled by thread connection or clamping and the like, further improving the assembly convenience and reliability of the air inlet grille 13 and the air outlet cylinder 10, which is beneficial to disassembling and cleaning and maintaining the air inlet grille 13 in daily use, and improves the practicability and reliability of the hair dryer 100.

[0052] In addition, the air outlet grille 15 can be provided with external threads or clamping grooves and the like on the outer circumferential side, and the air outlet cylinder 10 can be provided with internal threads and clamping protrusions and the like on the inner wall of the portion close to the air outlet, so that the outer circumferential side of the air outlet grille 15 and the inner wall of the air outlet cylinder 10 can be fixed by thread cooperation or clamping cooperation and the like. Alternatively, the air outlet grille 15 can be provided with a sleeve ring, which can be provided with a size corresponding to the end portion of the air outlet cylinder 10 provided with the air outlet, so that the sleeve ring can be sleeved on the end portion of the air outlet cylinder 10. At this time, the inner wall of the sleeve ring can be provided with internal threads and clamping protrusions and the like, and the outer wall of the air outlet cylinder 10 can be provided with external threads or clamping grooves and the like on the outer circumferential side of the end portion, so that the inner wall of the sleeve ring of the air inlet grille 13 and the outer wall of the air outlet cylinder 10 can be fixed by thread cooperation or clamping cooperation and the like. In this way, the air inlet grille 13 and the air outlet cylinder 10 can be conveniently disassembled and assembled by thread connection or clamping and the like, further improving the assembly convenience and reliability of the air inlet grille 13 and the air outlet cylinder 10, which is beneficial to disassembling and cleaning and maintaining the air inlet grille 13 in daily use, and improves the practicability and reliability of the hair dryer 100.

[0053] Referring to Figure 2 , Figure 5 and Figure 9In the embodiment of the utility model, first fan leaf 53 includes inner hub 531, outer hub 533, at least two first blades 535 and at least two second blades 537, inner hub 531 is connected first axle section 511, outer hub 533 is coaxial with inner hub 531 and is set up in the outer periphery of inner hub 531, and outer hub 533 and inner hub 531 form air inlet flow channel 5315, at least two first blades 535 are connected to the outer periphery of outer hub 533, at least two second blades 537 are spaced apart in air inlet flow channel 5315 and are connected outer hub 533 and inner hub 531.

[0054] In the embodiment, the first fan blade 53 can adopt a fan blade structure of combined air outlet form to achieve better air outlet effect by forming the air inlet flow channel 5315 between the coaxially arranged outer hub 533 and the inner hub 531, and connecting the outer hub 533 and the inner hub 531 by surrounding the outer periphery of the outer hub 533 with a plurality of first blades 535 and surrounding the inner wall of the outer hub 533 and the outer wall of the inner hub 531 with a plurality of second blades 537. The first blades 535 can adopt axial flow blades or inclined flow blades, and the second blades 537 can adopt centrifugal blades. Since the number of centrifugal blades is not affected by the size of the hub and the ratio of the hub, the design requirement of small hub and multiple blades is met, so that the inner hub 531 can be designed in a smaller size, and then compared with the fan blade structure provided with only axial flow blades, the second blades 537 in the form of centrifugal blades can increase the number of second blades 537, which is beneficial to better increase the air inlet volume of the first fan blade 53. At this time, by forming the air inlet flow channel 5315 between the outer hub 533 and the inner hub 531, the airflow disturbed by the outer hub 533 to the second blades 537 can be guided under the centrifugal effect, so that the airflow generated by the second blades 537 is axially out of the first shaft section 511. At this time, the rotation of the first blades 535 can generate axial or inclined airflow, and then the airflow generated by the first blades 535 and the airflow generated by the second blades 537 can be combined and discharged, so that the first fan blade 53 can generate greater air volume by rotation, further improve the air inlet volume of the hair dryer 100, and better reduce the operating power of the fan 51, improve the practicability and reliability of the hair dryer 100. The second blades 537 in the form of centrifugal blades can generate airflow with greater wind pressure, and then the airflow generated by the first blades 535 and the airflow generated by the second blades 537 can be mixed, so that the airflow generated by the first fan blade 53 has high air pressure and flow rate, and better improves the air outlet effect of the hair dryer 100. Since the linear speed of the inside of the axial flow blade is smaller than that of the outside, the airflow generated by the axial flow blade has the characteristics of small inside speed and large outside speed, so when the first blades 535 adopt axial flow blades, the second blades 537 can be arranged between the inner hub 531 and the outer hub 533 to compensate for the defect of insufficient inside linear speed of the first blades 535, so that the first fan blade 53 can blow out more uniform airflow, better realize the large air volume inlet effect of the hair dryer 100, and further improve the structural stability and reliability of the hair dryer 100.

[0055] The projection of the air inlet flow channel 5315 on the fixing member 30 can overlap at least part of the arc-shaped flow guide surface 35, so that the mixed air flow disturbed by the first blade 535 and the second blade 537 of the first fan blade 53 can be better guided to the second blade 537 through the arc-shaped flow guide surface 35, which is favorable to better reduce the turbulence of the air inlet flow of the air blowing device 100, reduce the flow speed attenuation and noise of the air inlet flow, and further improve the practicability and reliability of the air blowing device 100.

[0056] Referring to Figure 2 , Figure 5 and Figure 9 , in the embodiment of the utility model, the outer hub 533 includes a first air collecting ring 5331 and a second air collecting ring 5333, the first blade 535 is connected to the outer periphery of the first air collecting ring 5331, the second air collecting ring 5333 is arranged in the first air collecting ring 5331, one end of the second air collecting ring 5333 is connected to the inner wall of the first air collecting ring 5331, and the second blade 537 is connected to the inner hub 531 and the second air collecting ring 5333. The outer periphery of the second air collecting ring 5333 is arranged at an angle with the inner wall of the first air collecting ring 5331, and the width of the second air collecting ring 5333 is configured to gradually increase in the direction from the first air inlet to the air outlet.

[0057] In the embodiment, by arranging the inclined second air collecting ring 5333 in the first air collecting ring 5331, the second air collecting ring 5333 can be designed in a gradually expanding horn shape in the air inlet direction, and by connecting the inner hub 531 and the second air collecting ring 5333 with the second blade 537, the air entering the air inlet flow channel 5315 can be disturbed by the second blade 537 after passing through the second air collecting ring 5333 and the inner hub 531. Due to the disturbance of the second blade 537 of the centrifugal blade, the air flow can be subjected to a certain centrifugal force in the middle of the second air collecting ring 5333 and the inner hub 531, so that the air flow can flow along the inner wall of the second air collecting ring 5333. At this time, by arranging the second air collecting ring 5333 to be inclined, the air flow generated by the second blade 537 can be blown obliquely along the inner wall of the second air collecting ring 5333, which is favorable to guide the air flow to a certain extent. The air flow can be more easily discharged from between the inner hub 531 and the second air collecting ring 5333, reducing the turbulence or noise generated by the air flow. In addition, the air flow disturbed by the second blade 537 can be more quickly encountered by the air flow disturbed by the first blade 535 under the action of the inclined arrangement of the second air collecting ring 5333, realizing the rapid mixing of the two air flows, and further improving the flow rate of the mixed air flow generated by the first fan blade 53, and further improving the high-speed blowing effect of the air blowing device 100.

[0058] Referring to Figure 2 , Figure 5 and Figure 9In the embodiment of the utility model, inner wheel hub 531 includes drainage part 5311 and connecting part 5313, connecting part 5313 connects first shaft section 511, and drainage part 5311 is connected to one end of connecting part 5313 facing away from first shaft section 511. The outer periphery of connecting part 5313 is oppositely arranged with second wind collecting ring 5333, second blade 537 connects connecting part 5313 and second wind collecting ring 5333, and the width of connecting part 5313 is configured to gradually increase along the direction from first air inlet to air outlet.

[0059] In the embodiment, drainage part 5311 can be provided in a circular truncated cone structure, so that air can flow into air inlet flow channel 5315 along the arc-shaped top surface of drainage part 5311, which is conducive to better guiding the air flow by drainage part 5311, reduces the hindering effect of inner wheel hub 531 on the air flow, so that the air flow can have a higher flow rate, and better improves the blowing effect of first fan blade 53. By gradually increasing the width of connecting part 5313 along the direction from first air inlet to air outlet, the outer periphery of connecting part 5313 can be inclined to first shaft section 511, so that the outer periphery of connecting part 5313 can be approximately parallel to the inner wall of second wind collecting ring 5333, and then the air flow entering air inlet flow channel 5315 can further flow along the inclined outer periphery of connecting part 5313 after being guided by drainage part 5311, so that the air flow in air inlet flow channel 5315 can be better blown obliquely, so that the air flow disturbed by second blade 537 can be mixed with the air flow disturbed by first blade 535 more quickly, further improving the practicability and reliability of blowing device 100. The outer periphery of connecting part 5313 and drainage part 5311 can be provided in a circular arc structure, so that inner wheel hub 531 can better guide the air flow by the smooth outer wall of connecting part 5313 and drainage part 5311, which is conducive to better avoiding turbulence or noise of the air flow in air inlet flow channel 5315, further improving the structural stability and reliability of blowing device 100.

[0060] Referring to Figure 3 and Figure 5 In the embodiment of the utility model, the side of support guide vane 31 facing first fan blade 53 is formed with a flow guide inclined surface 317.

[0061] In the embodiment, the support guide vane 31 can be provided in a plate structure inclined to the rotation center axis of the fan 51, or the support guide vane 31 can be provided in a triangular block or trapezoidal block structure with an inclined surface on the side facing the first air inlet, so that the support guide vane 31 forms an inclined guide slope 317 on the side facing the first air inlet. Under the action of the guide slope 317, the airflow disturbed by the first fan blade 53 can flow to the second fan blade 55 better under the guide action of the guide slope 317, so that the airflow turbulence or noise in the accommodating cavity 11 is better avoided, the better blowing effect of the hair dryer 100 is realized, and the practicability and reliability of the hair dryer 100 are further improved.

[0062] Referring to Figure 3 and Figure 4 In the embodiment of the utility model, support guide vane 31 includes first support plate 311 and second support plate 313, first support plate 311 on the projection of fixed part 30 with the rotation center axis of fan assembly 50 is provided with the angle, and the side of first support plate 311 facing first fan blade 53 is formed into guide slope 317, second support plate 313 is connected to the side of first support plate 311, and is provided with the angle with first support plate 311, and first support plate 311 and second support plate 313 are enclosed to form lightening groove 315.

[0063] In the embodiment, the support guide vane 31 is formed by connecting the first support plate 311 and the second support plate 313, and the first support plate 311 and the second support plate 313 are arranged at an angle, so that the overall width of the support guide vane 31 can be increased by connecting the first support plate 311 and the second support plate 313 arranged at an angle, so that the support guide vane 31 can better improve the support and connection effect of the fixed part 30 and the air outlet cylinder 10 by using a certain structure thickness. At the same time, the lightening groove 315 is formed on the side facing the air outlet by the first support plate 311 and the second support plate 313, so that the overall structural strength of the support guide vane 31 can be better improved under the action of the second support plate 313, and the support guide vane 31 can be designed to be more lightweight, which is beneficial to better reduce the weight and material cost of the hair dryer 100, and further improve the structural stability and reliability of the hair dryer 100. One end of the first support plate 311 and the second support plate 313 can be connected to the outer periphery of the fixed part 30, and the other end of the first support plate 311 and the second support plate 313 can be connected to the inner wall of the air outlet cylinder 10, so that the two opposite inner walls of the lightening groove 315 can be formed by the fixed part 30 and the inner wall of the air outlet cylinder 10, which can ensure the overall connection stability of the support guide vane 31, the fixed part 30 and the air outlet cylinder 10, effectively avoid the support guide vane 31 from being broken due to excessive wind force during the operation of the hair dryer 100, so that the hair dryer 100 can realize better high-speed blowing effect, and the practicability and reliability of the hair dryer 100 are further improved.

[0064] Referring to Figure 3 and Figure 4 In the embodiment of the utility model, the outer periphery of the fixing part 30 is provided with a first wire hole communicating with the mounting groove 33, and the outer periphery of the air duct is provided with a second wire hole communicating with the lightening groove 315. The fan 51 is provided with a connecting cable, the connecting cable is arranged in the first wire hole and the second wire hole, and is partially accommodated in the lightening groove 315.

[0065] In the embodiment, by using the first wire hole 37 of the outer periphery of the fixing part 30 and the second wire hole 17 of the outer periphery of the air outlet cylinder 10, the control cable or power cable of the fan 51 can be routed from the accommodating cavity 11 to the second wire hole 17 through the first wire hole 37 in the mounting groove 33, and then connected with the control system or energy storage system outside the air outlet cylinder 10 through the second wire hole 17, thereby realizing stable routing of the hair dryer 100 and ensuring stable operation of the hair dryer 100.

[0066] By arranging the lightening groove 315 on the support guide vane 31, the positions of the first wire hole 37 and the second wire hole 17 corresponding to the lightening groove 315 can be arranged, so that the part of the cable routed from the first wire hole 37 in the accommodating cavity 11 to the second wire hole 17 can be accommodated in the lightening groove 315. The support guide vane 31 can not only be used for supporting and fixing the air outlet cylinder 10 and the fixing part 30, but also can be used for accommodating the cable of the fan 51, which is conducive to better avoiding the cable of the fan 51 from being exposed in the accommodating cavity 11 and having a certain probability of winding the first fan blade 53 and the second fan blade 55, better ensuring stable and reliable operation of the hair dryer 100, and being conducive to better improving the appearance of the hair dryer 100, further improving the structural stability and reliability of the hair dryer 100. The lightening groove 315 can be provided with a cable fixing buckle or a binding strap, so that the cable of the fan 51 can be better fixed and accommodated in the lightening groove 315, preventing the cable from loosening from the lightening groove 315, and further improving the structural stability and reliability of the hair dryer 100.

[0067] Referring to Figures 3 to 5 In the embodiment of the utility model, the fan 51 is provided with a control circuit board 515, the control circuit board 515 is sleeved on the outer periphery of the fan 51 and arranged in the mounting groove 33.

[0068] In the embodiment, the drive module, the function module and the like of the fan 51 can be integrated on the control circuit board 515, the control circuit board 515 is sleeved on the outer periphery of the fan 51, and the control circuit board 515 is accommodated in the mounting groove 33, so that the fan 51 can be controlled and powered by the integrated circuit, the overall volume of the control module arranged outside the hair dryer 100 is reduced, the overall structural stability of the fan 51 is improved, and wiring of the fan 51 is facilitated. Under the protection of the mounting groove 33, the control circuit board 515 can be effectively prevented from being affected by the airflow in the accommodation cavity 11, the stable operation of the hair dryer 100 is ensured, and the overall structural stability and reliability of the hair dryer 100 are further improved.

[0069] The above is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like made by using the content of the present application specification and drawings is included in the patent protection scope of the present application.

Claims

1. A blow-off device, characterized in that The application relates to an air outlet cylinder, a fixing member and a fan assembly. The air outlet cylinder is internally provided with a containing cavity, and a first air inlet and an air outlet are arranged at two ends of the air outlet cylinder and communicate with the containing cavity. The fixing member is arranged in the containing cavity, and a support vane is arranged on the outer periphery of the fixing member and connected to the inner wall of the air outlet cylinder. The fan assembly is arranged in the containing cavity and comprises a fan, a first fan blade and a second fan blade. The first fan blade is arranged between the fixing member and the first air inlet, the second fan blade is arranged between the fixing member and the air outlet, the fan is connected to the fixing member and is in transmission connection with the first fan blade and the second fan blade.

2. The blow-off device according to claim 1, wherein The air outlet cylinder is further provided with an overflow cavity and an overflow port which communicates with the overflow cavity and the containing cavity. The overflow port is arranged on the side of the second fan blade which is opposite to the air outlet, and a second air inlet which communicates with the overflow cavity is arranged on the side of the air outlet cylinder. The rotating radius of the first fan blade is defined as R1, the rotating radius of the second fan blade is defined as R2, and the distance between the end of the support vane which is opposite to the fixing member and the rotating center axis of the fan is defined as R3, wherein R1 < R3 and R2 > R3.

3. The blowoff device as claimed in claim 1, wherein The cross-sectional width of the first air cavity is configured to gradually decrease along the air outlet direction. The air outlet cylinder is provided with a plurality of support ribs at the overflow port.

4. The hair drying device of claim 3, wherein The side of the fixing member which is opposite to the air outlet is provided with a mounting groove, and the side of the fixing member which is opposite to the first air inlet is provided with an avoiding hole which communicates with the mounting groove. At least part of the structure of the fan is mounted in the mounting groove, and the two ends of the fan are respectively provided with a first shaft section and a second shaft section.

5. The hair drying device of claim 1, wherein The first shaft section passes through the avoiding hole and is connected to the first fan blade, and the second shaft section is connected to the second fan blade.

6. The hair drying device of claim 5, wherein The side of the fixing member which is opposite to the first air inlet is formed with an arc-shaped flow guide surface, and the avoiding hole is arranged on the arc-shaped flow guide surface. The fan is provided with a control circuit board which is sleeved on the outer periphery of the fan and arranged in the mounting groove. The air outlet cylinder is further provided with an air inlet grille and an air outlet grille.

7. The blow apparatus according to any one of claims 1 to 6, wherein The air inlet grille is detachably connected to the air outlet cylinder. The air outlet grille is detachably connected to the air outlet cylinder. The outer periphery of the air inlet grille is spaced from the outer periphery of the air outlet cylinder to form the overflow cavity, and the circumferential side of the air inlet fan blade is formed with the second air inlet. The first fan blade comprises: An inner hub which is in transmission connection with the fan; An outer hub which is coaxially arranged with the inner hub and is sleeved on the outer periphery of the inner hub, and an air inlet flow channel is formed between the outer hub and the inner hub; At least two first blades which are spaced from each other and connected to the outer periphery of the outer hub; and At least two second blades which are spaced from each other and connected to the outer periphery of the outer hub. At least two second blades are arranged in the air inlet channel and connected to the outer hub and the inner hub.

8. The hair drying device of claim 7, wherein The outer hub comprises: A first air collecting ring, and the first blade is connected to the outer periphery of the first air collecting ring. A second air collecting ring is arranged in the first air collecting ring, one end of the second air collecting ring is connected to the inner wall of the first air collecting ring, and the second blade is connected to the inner hub and the second air collecting ring. The outer periphery of the second air collecting ring is arranged at an angle with the inner wall of the first air collecting ring, and the width of the second air collecting ring is configured to gradually increase in the direction from the first air inlet to the air outlet.

9. The blow apparatus according to any one of claims 1 to 6, wherein The side of the support guide blade facing the first fan blade is formed with a guide slope.

10. The hair drying device of claim 9, wherein The support guide blade comprises: A first support plate, the projection of the first support plate on the fixing member is arranged at an angle with the center axis of rotation of the fan assembly, and the side of the first support plate facing the first fan blade is formed as the guide slope; A second support plate is connected to one side of the first support plate and arranged at an angle with the first support plate, and the first support plate and the second support plate form a weight-reducing groove.

11. The hair drying device of claim 10, wherein The outer periphery of the fixing member is provided with a first wire hole communicating with the mounting groove, and the outer periphery of the air duct is provided with a second wire hole communicating with the weight-reducing groove; The fan is provided with a connecting cable, the connecting cable is arranged in the first wire hole and the second wire hole, and is partially accommodated in the weight-reducing groove.

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