Noise reduction blower

Abstract

The utility model belongs to the technical field of hair driers, and particularly relates to a noise reduction hair drier which comprises a hair drier body, the hair drier body is provided with an air inlet and an air outlet, the air inlet and the air outlet are further provided with an air channel for airflow to penetrate through in the hair drier body, and a fan assembly is arranged on the side, close to the air inlet, in the air channel. The fan is used for sucking external air from the air inlet into the air duct and exhausting the air from the air outlet; a plurality of protrusions are distributed on the inner wall of the air duct and used for reducing the speed of air flow closer to the inner wall of the air duct, so that the speed of air flow closer to the center is higher than that of air flow closer to the outer side. The speed of the airflow on the outer side is reduced, noise can be reduced, the air pressure of the airflow in the center is diffused outwards, the situation that high-pressure airflow extrudes the inner wall of the air duct is reduced, noise is further reduced, noise generated when the blower works is reduced, and the use experience of a user is safely and effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hair dryer technical field, especially relate to a noise reduction hair dryer. BACKGROUND

[0002] Hair dryer is a household appliance, mainly used for drying and shaping hair. When the hair dryer is working, it sucks external air, so that a large amount of air is gathered and passes through the air duct in a short time. The strong wind force makes the airflow have a large flow rate and high air pressure. The airflow speed that is too fast will cause airflow vibration, resulting in noise. The airflow with high air pressure passing through the air duct will squeeze the inner wall of the air duct, thus generating a lot of noise. The noise will impact the user's hearing and affect the user's experience.

[0003] For example, the Chinese patent document with publication number CN209058226U discloses a noise reduction electric hair dryer, which comprises two housings, two limiting plates and a driving motor. A rubber ring is sleeved on the outer wall of the driving motor. The rubber ring is clamped between the two limiting plates. Two limiting grooves are arranged on the outer wall of the limiting plate. An acoustic absorption layer is fixed on the inner wall of each of the two housings. A protruding structure is arranged on one end of the outer wall of the acoustic absorption layer. A fixing groove is arranged on the outer wall of one end of the acoustic absorption layer. Two mounting grooves are arranged on the inner wall of the acoustic absorption layer. A supporting rod is fixed in each of the two mounting grooves. A rubber pad is fixed on the end of the supporting rod away from the mounting groove. The end of the rubber pad away from the supporting rod is inserted into the limiting groove.

[0004] In the technical solution of the above patent document, the inner wall of the hair dryer housing is provided with an acoustic absorption layer. The acoustic absorption layer can absorb the noise generated by the airflow. The rubber ring can reduce the vibration of the motor during operation and absorb noise, thereby reducing the noise of the hair dryer in use. However, the rubber ring is sleeved on the outer wall of the driving motor, which is not conducive to heat dissipation of the motor. Overheating of the motor will cause insulation aging, affecting performance and easily causing safety hazards. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a noise reduction hair dryer, which solves the problem that the existing noise reduction hair dryer uses a rubber ring for shock absorption and noise reduction, which easily causes safety hazards.

[0006] To achieve the above-mentioned purpose, the utility model embodiment provides a noise reduction hair dryer, which comprises a hair dryer main body. The hair dryer main body has an air inlet and an air outlet. An air duct through which airflow passes is arranged in the hair dryer main body between the air inlet and the air outlet. A fan assembly is arranged on one side of the air duct close to the air inlet. The fan assembly is used to suck external air into the air duct from the air inlet and discharge it from the air outlet. A plurality of protrusions are distributed on the inner wall of the air duct. The protrusions are used to reduce the speed of the airflow closer to the inner wall of the air duct, so that the speed of the airflow closer to the center is higher than that of the airflow on the outer side.

[0007] Further, the air duct is provided with a first cavity and a second cavity, the first cavity is provided with the protrusions on the inner wall, the second cavity extends from one end of the first cavity to the air outlet, and the caliber of the first cavity away from the one end of the fan assembly is smaller than the caliber of the second cavity.

[0008] Further, the protrusions are quadrangular pyramids, two edges of the quadrangular pyramids are parallel to the airflow direction, and the other two edges are perpendicular to the airflow direction.

[0009] Further, the hair dryer body comprises an outer shell and an inner cylinder, the inner cylinder is arranged in the outer shell, and a sound insulation cavity is formed between the outer side of the inner cylinder and the inner side of the outer shell; and the air duct is arranged in the inner cylinder.

[0010] Further, the inner side of the outer shell is provided with a plurality of support rib plates, and the support rib plates support the inner cylinder.

[0011] Further, the inner cylinder comprises two half-cylinder covers that are buckled.

[0012] The above one or more technical solutions in the noise reduction hair dryer provided by the embodiment of the utility model have at least the following technical effects:

[0013] Because the protrusions are distributed on the inner wall of the air duct, the protrusions can be used to reduce the speed of the airflow close to the inner wall of the air duct, so that the airflow close to the center has a higher speed than the airflow on the outer side, and the airflow close to the center has a higher air pressure than the airflow on the outer side. The reduction of the airflow speed on the outer side can reduce the generation of noise, the diffusion of the airflow close to the center can reduce the situation that the high air pressure airflow extrudes the inner wall of the air duct, and further reduce the generation of noise, thereby reducing the noise generated when the hair dryer works and effectively improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Fig. 1 The utility model embodiment provides the sectional view of the noise reduction hair dryer.

[0016] Fig. 2 The utility model embodiment provides the sectional view of the noise reduction hair dryer.

[0017] Fig. 3 The utility model embodiment provides the transverse sectional view of the noise reduction hair dryer.

[0018] In the figure, 100, hair dryer main body, 110, air inlet, 120, air outlet, 130, shell, 131, support rib plate, 140, inner cylinder, 141, two half-cylinder covers, 150, sound insulation cavity,

[0019] 200, air duct, 210, fan assembly, 220, protrusion, 230, first cavity, 240, second cavity. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the embodiments of the present application, and cannot be understood as a limitation of the present application.

[0021] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0022] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0023] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0024] In one embodiment of the noise reduction hair dryer of the present application, please refer to Figs. 1-3The noise-reducing hair dryer can reduce noise. The hair dryer body 100 has an air inlet 110 and an air outlet 120. The air inlet 110 and the air outlet 120 are provided with an air duct 200 through which air flows in the hair dryer body 100. The air duct 200 is provided with a fan assembly 210 near the air inlet 110. The fan assembly 210 is used to suck external air into the air duct 200 from the air inlet 110 and discharge it from the air outlet 120. The inner wall of the air duct 200 is provided with a plurality of protrusions 220. The protrusions 220 are used to reduce the speed of the airflow closer to the inner wall of the air duct 200, so that the airflow closer to the center has a higher speed than the airflow on the outer side.

[0025] Specifically, the protrusions 220 distributed on the inner wall of the air duct 200 can be used to reduce the speed of the airflow closer to the inner wall of the air duct 200, so that the airflow closer to the center has a higher speed than the airflow on the outer side, and the air pressure of the airflow closer to the center is higher than the air pressure of the airflow on the outer side. The reduction of the speed of the airflow on the outer side can reduce the generation of noise, and the air pressure of the airflow closer to the center is diffused outward, thereby reducing the situation that the high-pressure airflow presses the inner wall of the air duct 200, further reducing the generation of noise, thereby reducing the noise generated by the hair dryer during operation, and effectively improving the user's experience.

[0026] Further, the air duct 200 is provided with a first cavity 230 and a second cavity 240. The inner wall of the first cavity 230 is provided with protrusions 220. The second cavity 240 extends from one end of the first cavity 230 to the air outlet 120. The diameter of the end of the first cavity 230 away from the fan assembly 210 is smaller than the diameter of the second cavity 240. Specifically, the diameter of the end of the first cavity 230 away from the fan assembly 210 is smaller than the diameter of the second cavity 240, and the second cavity 240 extends from one end of the first cavity 230 to the air outlet 120, thereby increasing the range of outward diffusion of the high-pressure airflow in the center part, further reducing the situation that the high-pressure airflow presses the inner wall of the air duct 200, and further reducing noise.

[0027] Further, the protrusions 220 are four-pyramids. Two edges of the four-pyramids are parallel to the direction of the airflow, and the other two edges are perpendicular to the direction of the airflow. Specifically, the two edges of the four-pyramids are parallel to the direction of the airflow, so that the two edges form a flow guide surface, guiding the airflow to branch along the flow guide surface, reducing the air resistance of the airflow, and thereby reducing noise.

[0028] Further, the hair dryer body 100 comprises a shell 130 and an inner cylinder 140, the inner cylinder 140 is arranged in the shell 130, and a sound insulation cavity 150 is formed between the outer side of the inner cylinder 140 and the inner side of the shell 130. The air duct 200 is arranged in the inner cylinder 140. Specifically, the sound insulation cavity 150 is formed between the inner cylinder 140 and the shell 130, the sound insulation cavity 150 can absorb the noise generated by the inner cylinder air duct 200, and reduce the noise generated when the hair dryer works.

[0029] Further, the inner side of the shell 130 is provided with a plurality of support rib plates 131, and the support rib plates 131 support the inner cylinder 140. Specifically, the plurality of support rib plates 131 stably arrange the inner cylinder 140 on the inner side of the shell 130.

[0030] Further, the inner cylinder 140 comprises two half-cylinder covers 141. Specifically, the two half-cylinder covers 141 are buckled to form the inner cylinder 140, so that the production difficulty of the convex 220 of the inner cylinder is reduced, and the parts are assembled in the inner cylinder 140.

[0031] The above is only a preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A noise-reducing hair dryer, characterized by: The hair dryer comprises a hair dryer body, an air inlet and an air outlet, an air duct in the hair dryer body through which air flows, a fan assembly near the air inlet of the air duct for sucking external air into the air duct from the air inlet and discharging air from the air outlet, and a plurality of protrusions on the inner wall of the air duct for reducing the speed of air flow closer to the inner wall of the air duct so that the speed of air flow closer to the center is higher than that of air flow closer to the outside.

2. The noise reducing hair dryer of claim 1, wherein: The air duct is provided with a first cavity and a second cavity, the protrusions are arranged on the inner wall of the first cavity, the second cavity extends from one end of the first cavity to the air outlet, and the diameter of the first cavity at the end away from the fan assembly is smaller than that of the second cavity.

3. The noise reducing hair dryer of claim 1, wherein: The protrusions are quadrangular pyramids, two edges of the quadrangular pyramids are arranged in parallel with the direction of air flow, and the other two edges are arranged in perpendicular to the direction of air flow.

4. A noise reducing hair dryer according to any one of claims 1 to 3, wherein: The hair dryer body comprises an outer shell and an inner cylinder, the inner cylinder is arranged in the outer shell, a sound insulation cavity is formed between the outer side of the inner cylinder and the inner side of the outer shell, and the air duct is arranged in the inner cylinder.

5. The noise reducing hair dryer of claim 4, wherein: The inner side of the outer shell is provided with a plurality of support rib plates for supporting the inner cylinder.

6. The noise reducing hair dryer of claim 5, wherein: The inner cylinder comprises two half-cylinder covers which are fastened together.

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