Low-noise self-rotating blower tuyere

Abstract

The invention belongs to the technical field of household appliances, and provides a low-noise self-rotating blower tuyere which comprises a connecting assembly, the connecting assembly is fixedly connected to an air outlet of a blower, a first annular tuyere unit is arranged in the connecting assembly, and the air inlet end of the first annular tuyere unit communicates with an internal flow channel of the blower; the air nozzle rotor is rotationally connected to the side, away from the air blower, of the connecting assembly, a second annular air nozzle unit is arranged in the air nozzle rotor, and the air inlet end of the second annular air nozzle unit communicates with the air outlet end of the first annular air nozzle unit. The axis of a circular ring structure formed by the air outlet end of the second annular air nozzle unit is parallel to the axis of a rotating shaft of the air nozzle rotor and is not coaxial with the rotating shaft of the air nozzle rotor, and a power piece used for driving the air nozzle rotor to rotate is arranged in the second annular air nozzle unit. According to the air nozzle, the blower can achieve non-fixed-point blowing, air volume attenuation is small, and noise is low.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to a low-noise self-rotating hair dryer nozzle. Background Art

[0002] A hair dryer is a small personal care appliance that can quickly dry hair. The hair can be dried faster by heating the heating wire to make the air hot. The air outlet of the hair dryer in the prior art is relatively large, and the hot air blown out cannot be concentrated. Even if a nozzle is installed at the air outlet of the existing hair dryer, the nozzle can only simply restrict the shape of the air outlet, thereby playing a role in restricting the wind pattern. However, since it can only unidirectionally blow air with a fixed wind direction, the user needs to manually rotate the hair dryer when using it to achieve non-fixed-point blowing.

[0003] The few rotating air nozzles available on the market not only increase the complexity of the structure, but also increase the noise by at least 5dB(A) compared to the original nozzleless fans. The air volume is also greatly attenuated, with an effective airflow loss of at least 20%, resulting in a poor user experience. Summary of the invention

[0004] The purpose of the present invention is to provide a low-noise self-rotating hair dryer nozzle to solve the above-mentioned problem and achieve the purpose of non-fixed-point blowing of the hair dryer with small air volume attenuation and low noise.

[0005] To achieve the above object, the present invention provides the following solution: a low-noise self-rotating hair dryer nozzle, comprising:

[0006] A connecting component, wherein the connecting component is fixedly connected to the air outlet of the hair dryer, wherein a first annular air nozzle unit is arranged in the connecting component, and an air inlet end of the first annular air nozzle unit is communicated with an internal flow channel of the hair dryer;

[0007] A nozzle rotor, the nozzle rotor is rotatably connected to a side of the connecting assembly away from the hair dryer, a second annular nozzle unit is arranged inside the nozzle rotor, an air inlet end of the second annular nozzle unit is connected to an air outlet end of the first annular nozzle unit, an axis of a circular ring structure formed by the air outlet end of the second annular nozzle unit is parallel to and non-coaxially arranged with the axis of a rotating shaft of the nozzle rotor, and a power part for driving the nozzle rotor to rotate is arranged inside the second annular nozzle unit.

[0008] Preferably, the connecting component includes a nozzle shell, which is fixedly connected to the air outlet of the hair dryer, and a nozzle stator is fixedly connected inside the nozzle shell. A slot is provided on the side of the nozzle stator away from the hair dryer, and the nozzle rotor is rotatably connected to the nozzle stator through the slot.

[0009] Preferably, the first annular nozzle unit includes a plurality of stator flow channels, which are arranged in a ring shape and fixed at equal intervals on the side wall of the nozzle stator close to the hair dryer, and the airflow in the hair dryer flow channel enters the second annular nozzle unit through the stator air outlet on the stator flow channel.

[0010] Preferably, the nozzle rotor includes a connecting cap, a rotor shaft is coaxially fixedly connected to a side of the connecting cap close to the nozzle stator, the rotor shaft is rotatably connected in the slot, and the second annular nozzle unit is fixedly connected to the side wall of the connecting cap.

[0011] Preferably, the second annular air nozzle unit comprises an annular rotor flow channel, the annular rotor flow channel is fixedly connected to the circumferential side wall of the connecting cap, and the annular rotor air inlet of the annular rotor flow channel is connected to the stator air outlet;

[0012] The annular rotor flow channel is arranged obliquely, and the axis of the annular rotor air outlet of the annular rotor flow channel is parallel to the axis of the rotor shaft and is arranged non-coaxially.

[0013] Preferably, an annular sealing cap is provided at the annular rotor air inlet end of the annular rotor flow channel, the stator flow channel is located in the annular sealing cap, and a gap is provided between the annular sealing cap and the stator flow channel.

[0014] Preferably, the power member comprises a plurality of power sheets, and the plurality of power sheets are fixedly connected in the annular rotor flow channel at equal intervals, and an angle is provided between the power sheets and the flow direction of the airflow in the annular rotor flow channel.

[0015] Preferably, the eccentricity L between the axis of the annular rotor air outlet of the annular rotor flow channel and the axis of the rotor shaft is set between mm and 5 mm.

[0016] Preferably, the length H2 of the annular rotor flow channel along the axial direction of the rotor shaft is set between 8 mm and 30 mm.

[0017] Preferably, the outer diameter and inner diameter of the annular rotor outlet satisfy:

[0018] 0.8D2'≤D2≤D2'<D'≤D≤2D'

[0019] Wherein: D1 is the outer diameter of the annular rotor air outlet, D2 is the inner diameter of the annular rotor air outlet, D1' is the outer diameter of the stator air outlet, and D2' is the inner diameter of the stator air outlet.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] In the present invention, the main function of the connecting assembly is to enable the nozzle rotor to be rotatably installed on the hair dryer; the main function of the first annular nozzle unit is to enable the airflow of the hair dryer to smoothly enter the second annular nozzle unit; the second annular nozzle unit is used to blow out high-speed airflow; the main function of the power component is to use the reverse thrust of the airflow to rotate the nozzle rotor to achieve the effect of non-fixed-point blowing. On the whole, the present invention sets the second annular nozzle unit to make the airflow flow out at a high speed, reduce the attenuation of the airflow velocity and reduce the noise, and at the same time, the power component makes the second annular nozzle unit rotate eccentrically around the rotating shaft of the nozzle rotor to achieve non-fixed-point blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is an exploded schematic diagram of the air nozzle of the present invention;

[0024] Figure 2 It is a front exploded schematic diagram of the air nozzle of the present invention;

[0025] Figure 3 It is a rear exploded schematic diagram of the air nozzle of the present invention;

[0026] Figure 4 It is a front view schematic diagram of the wind nozzle rotor of the present invention;

[0027] Figure 5 is a side cross-sectional view of the air nozzle of the present invention;

[0028] Figure 6 It is a side cross-sectional view of the wind nozzle rotor of the present invention;

[0029] Figure 7 It is a schematic diagram of the power sheet of the present invention;

[0030] Figure 8 It is a schematic diagram of the connection between the air nozzle and the hair dryer of the present invention;

[0031] Among them, 1. Nozzle rotor; 2. Nozzle stator; 3. Nozzle housing; 4. Nozzle bearing; 5. Stator air outlet; 6. Ring-shaped rotor air outlet; 7. Rotor shaft; 8. Stator flow channel; 9. Ring-shaped rotor flow channel; 10. Ring-shaped sealing cap; 11. Power sheet; 12. Slot; 13. Connecting cap; 14. Ring-shaped rotor air inlet. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figure 1-Figure 8 The present invention provides a low-noise self-rotating hair dryer nozzle, comprising:

[0035] A connecting component, the connecting component is fixedly connected to the air outlet of the hair dryer, a first annular air nozzle unit is arranged in the connecting component, and an air inlet end of the first annular air nozzle unit is communicated with an internal flow channel of the hair dryer;

[0036] The nozzle rotor 1 is rotatably connected to the side of the connecting component away from the hair dryer, and a second annular nozzle unit is arranged in the nozzle rotor 1. The air inlet end of the second annular nozzle unit is connected to the air outlet end of the first annular nozzle unit. The axis of the circular ring structure formed by the air outlet end of the second annular nozzle unit is parallel to the axis of the rotating shaft of the nozzle rotor 1 and is not coaxially arranged. A power part for driving the nozzle rotor 1 to rotate is arranged in the second annular nozzle unit.

[0037] The main function of the connecting assembly is to enable the nozzle rotor 1 to be rotatably installed on the hair dryer; the main function of the first annular nozzle unit is to enable the airflow of the hair dryer to smoothly enter the second annular nozzle unit; the second annular nozzle unit is used to blow out high-speed airflow; the main function of the power component is to use the reverse thrust of the airflow to rotate the nozzle rotor 1 to achieve the effect of non-fixed-point blowing. On the whole, the present invention sets the second annular nozzle unit to make the airflow flow out at a high speed, reduce the attenuation of the airflow velocity and reduce the noise, and at the same time, the second annular nozzle unit is made to rotate eccentrically around the rotating shaft of the nozzle rotor through the power component to achieve non-fixed-point blowing.

[0038] A further optimized solution is that the connecting component includes a nozzle shell 3, which is fixedly connected to the air outlet of the hair dryer, a nozzle stator 2 is fixedly connected inside the nozzle shell 3, a slot 12 is provided on the side of the nozzle stator 2 away from the hair dryer, and the nozzle rotor 1 is rotatably connected to the nozzle stator 2 through the slot 12.

[0039] like Figure 1 and Figure 8 As shown, the main function of the nozzle housing 3 is to cover the nozzle stator 2 and achieve a decorative effect.

[0040] As a further optimization scheme, claws and slots can be respectively provided at the nozzle housing 3 and the air outlet of the hair dryer to realize quick connection between the nozzle and the hair dryer. Similarly, claws and slots can also be provided between the nozzle stator 2 and the hair dryer to realize quick connection.

[0041] A further optimized solution is that the first annular air nozzle unit includes a plurality of stator flow channels 8, which are arranged in a ring shape and fixed at equal intervals on the side wall of the air nozzle stator 2 close to the hair dryer. The airflow in the hair dryer flow channel enters the second annular air nozzle unit through the stator air outlet 5 on the stator flow channel 8.

[0042] like Figure 2 , Figure 3 and Figure 5 As shown, the stator flow channel 8 is a boss structure in the nozzle stator 2. Several stator flow channels 8 are connected end to end to form a ring and are evenly spaced on the rear side wall of the nozzle stator 2. Their arrangement position is consistent with the air outlet position of the hair dryer to facilitate smooth air outlet.

[0043] According to a further optimization scheme, the nozzle rotor 1 includes a connecting cap 13 , and a rotor shaft 7 is coaxially fixedly connected to one side of the connecting cap 13 close to the nozzle stator 2 . The rotor shaft 7 is rotatably connected in the slot 12 , and the second annular nozzle unit is fixedly connected to the side wall of the connecting cap 13 .

[0044] According to a further optimized solution, the second annular air nozzle unit includes an annular rotor flow channel 9, which is fixedly connected to the circumferential side wall of the connecting cap 13, and the annular rotor air inlet 14 of the annular rotor flow channel 9 is connected to the stator air outlet 5;

[0045] The annular rotor flow channel 9 is arranged at an inclination, and the axis of the annular rotor air outlet 6 of the annular rotor flow channel 9 is parallel to the axis of the rotor shaft 7 and is arranged non-coaxially.

[0046] like Figure 3-Figure 5 As shown, the annular rotor flow channel 9 is tilted in a uniform direction, that is, the side view of the annular rotor flow channel 9 is a parallelogram structure. When the connecting cap 13 rotates around the rotor shaft 7, the annular rotor flow channel 9 can discharge air in a rotating manner in the front around the axis of the rotor shaft 7, thereby covering the user's face and achieving the effect of non-fixed-point blowing.

[0047] Further optimization scheme, such as Figure 1 and Figure 5 As shown, two sets of nozzle bearings 4 are fixedly connected in the slot 12, and the rotor shaft 7 is rotatably connected to the nozzle stator 2 through the nozzle bearings 4. The nozzle bearings 4 can reduce the rotation resistance and rotation noise of the nozzle rotor 1.

[0048] According to a further optimization scheme, an annular sealing cap 10 is provided at the end of the annular rotor air inlet 14 of the annular rotor flow channel 9 , the stator flow channel 8 is located in the annular sealing cap 10 , and a gap is provided between the annular sealing cap 10 and the stator flow channel 8 .

[0049] like Figure 5 As shown, the annular sealing cap 10 is buckled at the stator air outlet 5 of the stator flow channel 8 to prevent air leakage.

[0050] Further optimization scheme, such as Figure 5 As shown, the axial distance t1 between the annular sealing cap 10 and the stator flow channel 8 and the circumferential distance t2 between the annular sealing cap 10 and the stator flow channel 8 are both within the range of 0.5 mm to 2 mm, which can ensure that the airflow will not leak while reducing the friction loss of the airflow between the nozzle rotor 1 and the nozzle stator 2.

[0051] According to a further optimization scheme, the power part includes a plurality of power sheets 11 , and the plurality of power sheets 11 are fixedly connected in the annular rotor flow channel 9 at equal intervals, and an angle is set between the power sheets 11 and the flow direction of the airflow in the annular rotor flow channel 9 .

[0052] like Figure 4 and Figure 5 As shown, the airflow in the annular rotor flow channel 9 impacts the plurality of power sheets 11, generates lateral impact force on the plurality of power sheets 11, and drives the nozzle rotor 1 to rotate.

[0053] According to a further optimization scheme, the eccentricity L between the axis of the annular rotor air outlet 6 of the annular rotor flow channel 9 and the axis of the rotor shaft 7 is set between 1 mm and 5 mm.

[0054] like Figure 5 As shown, by reasonably setting the value of L, the air outlet angle ɑ of the annular rotor flow channel 9 can be within the range of 70° to 85° under the condition of the appearance size requirements of the air nozzle, that is, when the handheld hair dryer is 30 cm in front of the user, the non-fixed-point blowing range can cover the entire face of the user.

[0055] According to a further optimization scheme, the length H2 of the annular rotor flow channel 9 along the axial direction of the rotor shaft 7 is set between 8 mm and 30 mm.

[0056] like Figure 5 As shown, by limiting the value of H2, the length of the annular rotor flow channel 9 can be within an appropriate range. If the length of the annular rotor flow channel 9 is too short, the airflow after the high-speed airflow impacts the power blade 11 has not been rectified. If the length of the annular rotor flow channel 9 is too long, the airflow flow channel resistance loss will increase.

[0057] According to a further optimization scheme, the axial height of the power sheet 11 is H1, then 0.2H2≤H1≤0.8H2, and the value of H1 is within a suitable range, which can ensure that the nozzle rotor 1 has sufficient structural strength while not increasing flow losses due to the excessive length of the power sheet 11.

[0058] The angle between the center line of the power sheet 11 and the outlet end face of the hair dryer, that is, the power angle θ is in the range of 4° to 15°. This angle determines the rotation speed of the rotor and can be optimized according to user experience. The smaller the angle, the slower the speed and the smaller the noise. However, if the angle is too small, the meaning of non-fixed-point blowing is lost. If it is too large, the noise will increase and the user experience will be weakened.

[0059] Further optimization scheme, the outer diameter and inner diameter of the annular rotor outlet 6 meet the following conditions:

[0060] 0.8D2'≤D2≤D2'<D1'≤D1≤2D1'

[0061] Wherein: D1 is the outer diameter of the annular rotor air outlet 6 , D2 is the inner diameter of the annular rotor air outlet 6 , D1′ is the outer diameter of the stator air outlet 5 , and D2′ is the inner diameter of the stator air outlet 5 .

[0062] like Figure 6 As shown, through reasonable setting, the acceleration angle β of the annular rotor flow channel 9 can be within the range of 2° to 15° to ensure that the accelerated airflow loss is minimized.

[0063] By installing the air nozzle of this embodiment, the high-speed airflow in the hair dryer directly enters the stator flow channel 8 through the fan flow channel. After the airflow comes out of the stator flow channel 8, it enters the annular rotor flow channel 9. When the airflow enters the annular rotor flow channel 9, it passes through the power sheet 11, so that the air nozzle rotor 1 is subjected to the rotational force and rotates. At the same time, the airflow is accelerated and rectified in the annular rotor flow channel 9, so that the airflow velocity flows out without attenuation. The airflow is blown out in rotation, and non-fixed-point blowing is realized. The airflow basically maintains the original wind speed flow during the entire flow, so the air volume attenuation is reduced and the noise is small.

[0064] Compared with the original hair dryer without a nozzle, the noise only increased by 3dB(A), which is 4dB(A) lower than the existing technical solution; compared with the original fan without a nozzle, the air volume only decreased by 5%, which is 15% higher than the existing technical solution.

[0065] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0066] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A low-noise self-rotating hair dryer nozzle, characterized in that: include: A connecting component, wherein the connecting component is fixedly connected to the air outlet of the hair dryer, wherein a first annular air nozzle unit is arranged in the connecting component, and an air inlet end of the first annular air nozzle unit is communicated with an internal flow channel of the hair dryer; A nozzle rotor (1), the nozzle rotor (1) is rotatably connected to a side of the connection component away from the hair dryer, a second annular nozzle unit is arranged inside the nozzle rotor (1), an air inlet end of the second annular nozzle unit is connected to an air outlet end of the first annular nozzle unit, an axis of a circular ring structure formed by the air outlet end of the second annular nozzle unit is parallel to the axis of a rotating shaft of the nozzle rotor (1) and is non-coaxially arranged, and a power part for driving the nozzle rotor (1) to rotate is arranged inside the second annular nozzle unit.

2. A low-noise self-rotating hair dryer nozzle according to claim 1, characterized in that: The connection assembly comprises a nozzle housing (3), the nozzle housing (3) being fixedly connected to the air outlet of the hair dryer, a nozzle stator (2) being fixedly connected inside the nozzle housing (3), a slot (12) being provided on a side of the nozzle stator (2) away from the hair dryer, and the nozzle rotor (1) being rotationally connected to the nozzle stator (2) via the slot (12).

3. A low-noise self-rotating hair dryer nozzle according to claim 2, characterized in that: The first annular air nozzle unit comprises a plurality of stator flow channels (8), the plurality of stator flow channels (8) being arranged in an annular shape and fixedly arranged at equal intervals on the side wall of the air nozzle stator (2) close to the hair dryer, and the airflow in the hair dryer flow channel enters the second annular air nozzle unit through the stator air outlet (5) on the stator flow channel (8).

4. A low-noise self-rotating hair dryer nozzle according to claim 3, characterized in that: The nozzle rotor (1) comprises a connecting cap (13), a rotor shaft (7) being coaxially fixedly connected to a side of the connecting cap (13) close to the nozzle stator (2), the rotor shaft (7) being rotatably connected in the slot (12), and the second annular nozzle unit being fixedly connected to a side wall of the connecting cap (13).

5. A low-noise self-rotating hair dryer nozzle according to claim 4, characterized in that: The second annular air nozzle unit comprises an annular rotor flow channel (9), the annular rotor flow channel (9) is fixedly connected to the circumferential side wall of the connecting cap (13), and the annular rotor air inlet (14) of the annular rotor flow channel (9) is connected to the stator air outlet (5); The annular rotor flow channel (9) is arranged obliquely, and the axis of the annular rotor air outlet (6) of the annular rotor flow channel (9) is parallel to the axis of the rotor shaft (7) and is arranged non-coaxially.

6. A low-noise self-rotating hair dryer nozzle according to claim 5, characterized in that: An annular sealing cap (10) is provided at the annular rotor air inlet (14) end of the annular rotor flow channel (9), the stator flow channel (8) is located in the annular sealing cap (10), and a gap is provided between the annular sealing cap (10) and the stator flow channel (8).

7. The low-noise self-rotating hair dryer nozzle according to claim 5, characterized in that: The power element comprises a plurality of power sheets (11), wherein the plurality of power sheets (11) are fixedly connected in the annular rotor flow channel (9) at equal intervals, and an angle is provided between the power sheets (11) and the flow direction of the airflow in the annular rotor flow channel (9).

8. The low-noise self-rotating hair dryer nozzle according to claim 5, characterized in that: The eccentricity L between the axis of the annular rotor air outlet (6) of the annular rotor flow channel (9) and the axis of the rotor shaft (7) is set between 1 mm and 5 mm.

9. The low-noise self-rotating hair dryer nozzle according to claim 5, characterized in that: The length H2 of the annular rotor flow channel (9) along the axial direction of the rotor shaft (7) is set between 8 mm and 30 mm.

10. The low-noise self-rotating hair dryer nozzle according to claim 5, characterized in that: The outer diameter and inner diameter of the annular rotor air outlet (6) satisfy the following conditions: 0.8D2'≤D2≤D2'<D1'≤D1≤1.2D1' In the formula: D1 is the outer diameter of the annular rotor air outlet (6), D2 is the inner diameter of the annular rotor air outlet (6), D1' is the outer diameter of the stator air outlet (5), and D2' is the inner diameter of the stator air outlet (5).

Images