CN111887569A - Hair dryer - Google Patents

Abstract

The invention discloses a hair dryer, comprising a handle connected with an air duct and the air duct, a fan assembly is arranged in the handle, the front end of the air duct is an outlet end, and the rear end of the air duct is an air outlet. Closed, an annular air outlet is formed on the periphery of the front end of the air duct, a central air outlet is formed in the center of the front end of the air duct, and the high-speed airflow inside the air duct is respectively discharged from the annular air outlet and the center. After passing through a certain distance, the airflow blown from the annular air outlet and the air blown from the central air outlet are mixed to form a columnar laminar airflow with enhanced wind pressure. The air outlet structure of the present invention is composed of an annular air outlet and a central air outlet. After passing a certain distance, the blown air is mixed to form a columnar laminar air flow with enhanced wind pressure, and the enhanced section is just the normal use section of the hair dryer. , the above structure of the present invention enables the airflow to reach the highest wind pressure in the use section, and improves the utilization rate of the wind pressure.

Description

a hair dryer

technical field

The invention relates to a small household appliance, in particular to a hair dryer for blowing.

Background technique

A traditional hair dryer includes a blower and a handle, and a fan assembly is installed in the blower. When in use, hair is often drawn into the blower and wrapped around the fan assembly. In the prior art, there is a solution for arranging the fan assembly in the handle. For example, the Chinese Patent No. 201310111469.8 is an invention patent, published on August 3, 2016, which discloses a hair dryer, including a main body, a fan A unit and a duct for conveying airflow to the body, wherein the duct includes an airflow inlet positioned at or near an end of the duct remote from the body, and a fan unit is arranged in the duct between the inlet and the body, wherein a portion of the duct Using a material as the lining and wherein the lined portion of the conduit is disposed between the fan assembly and the body, wherein the hair dryer includes an airflow flow path extending through the body, and the primary airflow flow path extends from the airflow inlet to the airflow outlet wherein the airflow flow path is nested or embedded in the primary airflow flow path, and a heater is provided, the heater is located in the primary airflow flow path in the body, and the airflow flow path is in thermal communication with the heater. In the above scheme, the middle part of the body is a hollow structure, and the air is discharged from the periphery. The front end of the hollow structure of the body is the air outlet end, and the rear end is the air inlet end. The Coanda effect is used to supplement the natural wind to the air outlet. In the air outlet structure in the prior art, the air pressure gradually decreases from the air outlet, and a larger air pressure is required to meet the needs.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the above-mentioned deficiencies of the prior art, and to provide a hair dryer with enhanced wind pressure in the use section, convenient use and small volume.

A hair dryer provided according to the present invention comprises a handle connected with an air duct and the air duct, a fan assembly is arranged in the handle, the front end of the air duct is an air outlet, and the rear of the air duct is an air outlet. The end is closed, the outer periphery of the front end of the air duct is formed with an annular air outlet, the center of the front end of the air duct is formed with a central air outlet, and the internal high-speed airflow of the air duct comes out from the annular air outlet and the center respectively. The air outlet blows out, and the airflow blown out from the annular air outlet and the air stream blown out from the central air outlet are mixed to form a columnar laminar airflow with enhanced wind pressure after passing a certain distance.

A hair dryer provided according to the present invention also has the following auxiliary technical features:

It is further included that the airflow blown from the annular air outlet and the airflow blown from the central air outlet are mixed to form a columnar laminar airflow with enhanced wind pressure after passing through 14 cm.

Further included, the length of the columnar laminar airflow enhanced by the wind pressure is 5cm-20cm.

Further included, the diameter of the central air outlet hole is 2.0mm-3.0mm.

It further includes that an annular air duct communicated with the annular air outlet is arranged in the air duct, a central air duct communicated with the central air outlet is arranged in the air duct, and a high-speed airflow inside the air duct is provided. into the annular air duct and the central air duct respectively.

It further includes that an air guide member is provided in the inner cavity of the front end of the air duct, the annular air duct is formed on the periphery of the air guide member, and the annular air outlet is formed on the periphery of the front end of the air guide member. The center of the air guide is formed with a central air duct, and the center of the front end of the air guide is formed with a central air outlet.

It further includes that the air guide includes an outer wall and an inner wall, the annular air duct is formed between the outer wall and the inner wall, the front end of the outer wall forms an inward arc, and the front end of the inner wall forms In the outward arc-shaped portion, the two arc-shaped portions are disposed opposite to each other to form the annular air outlet, and the annular air outlet is of an annular sandwich structure.

It is further included that the arc-shaped portion is a flow guide surface composed of a multi-segment arc structure.

It is further included that an inner cavity is formed in the middle of the air guide member, the rear end of the inner cavity of the air guide member is provided with an air inlet hole, and the front end is provided with the central air outlet hole.

It is further included that a bell mouth is formed in the middle of the front end of the air guide member, and the central air outlet hole is located in the center of the bell mouth.

Compared with the prior art, the hair dryer provided by the present invention has the following advantages: First, the air outlet structure of the present invention is composed of an annular air outlet and a central air outlet, and the blown air is mixed to form after passing a certain distance. For the columnar laminar airflow with enhanced wind pressure, the enhanced section is just the normal use section of the hair dryer. The above structure of the present invention enables the airflow to reach the highest wind pressure in the use section and improves the utilization rate of the wind pressure. Secondly, the present invention provides a hair dryer with a brand new structure. The rear end of the hair dryer is closed, and the Coanda effect is not used to mix natural air and hot air. Therefore, the temperature of the hot air blown out can be set at will, and it is easy to The control is not only safe and reliable, but also easy to use.

Description of drawings

FIG. 1 is a cross-sectional view of the present invention.

FIG. 2 is a cross-sectional view of the air cylinder of the present invention.

FIG. 3 is a front view of the air guide in the present invention.

FIG. 4 is a cross-sectional view of the air guide in the present invention.

Figure 5 is a rear view of the present invention.

FIG. 6 is an enlarged view of part A in FIG. 1 .

FIG. 7 is an exploded perspective view of the air guide in the present invention.

FIG. 8 is a schematic diagram of blowing in the present invention.

Figure 9 is a front view of the handle of the present invention.

10 is a perspective view of the lower cover of the handle in the present invention.

11 is a partial perspective view of the lower handle cover and the upper handle cover in the present invention.

Figure 12 is a partial perspective view of the handle and the blower in the present invention.

Figure 13 is a perspective view of the handle upper cover and the handle lower cover in the present invention.

Fig. 14 is a perspective view of the handle upper cover, the handle lower cover and the fixing seat in the present invention.

Figure 15 is a cross-sectional view of the cover in the present invention.

Detailed ways

In order to clearly illustrate the solutions in the present invention, preferred embodiments are given below and described in detail with reference to the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the application or uses of the present disclosure. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

As shown in FIG. 1 to FIG. 15 , a hair dryer provided by the present invention includes a handle 2 connected with a blower 1 and the blower 1 , a fan assembly 3 is arranged in the handle 2 , and the blower The front end of the air duct 1 is the air outlet end, the rear end of the air duct 1 is closed, the outer periphery of the front end of the air duct 1 is formed with an annular air outlet 10, and the center of the front end of the air duct 1 is formed with a central air outlet 20, so The internal high-speed air flow of the air duct 1 is blown out from the annular air outlet 10 and the central air outlet 20 respectively, and the air flow blown out of the annular air outlet 10 and the central air outlet 20 passes a certain distance. The post-mixing forms a columnar laminar airflow with enhanced wind pressure. The specific distance in this embodiment refers to the shortest distance between the air outlet of the hair dryer and the hair when the user uses it normally. The air outlet of the prior art hair dryer is usually the highest air pressure at the air outlet, and then gradually decreases. The air pressure in the use section is smaller than the air pressure at the air outlet. In order to increase the air pressure in the use section, it is necessary to increase the air pressure at the air outlet. The increase in wind pressure not only requires a higher speed motor, but also needs to improve the structure of the entire air duct. High wind pressure also means that the noise of the hair dryer will increase. The invention utilizes the combined structure of the annular outlet and the central outlet, so that the outlet air is mixed in the use section, so that the wind pressure in the use section reaches the highest level, and the airflow is fully utilized.

The specific test data can be found in the table below. It can be seen from the table that the wind pressure in the prior art is gradually decreasing, while the wind pressure in the present invention increases after 14 cm and begins to decrease after 28 cm. From the schematic diagram of the air outlet given in FIG. 8 , it can also be seen that the wind pressure of the present invention reaches the highest level during the use period.

blowing distance Air pressure of the prior art The wind pressure of the present invention 10cm 145 132 12cm 143 135 14cm 142 137 16cm 142 140 18cm 141 137 20cm 140 138 22cm 140 137 24cm 139 136 26cm 139 135 28cm 139 136 30cm 139 134 32cm 139 133 34cm 139 133 36cm 139 134

The rear end of the air duct 1 in the present invention is closed, and the Coanda effect is not used, so there is no natural wind supplemented into the hot air, and the temperature of the blown hot air is controllable.

Referring to FIGS. 1 to 4 , the above-mentioned embodiment of the present invention further includes that the airflow blown out from the annular air outlet 10 and the airflow blown out from the central air outlet 20 are mixed to form an enhanced wind pressure after passing 14 cm. Cylindrical laminar airflow. In the present invention, 14 cm is usually the shortest distance of the use section. If the distance between the use section and the scalp is too short, the hot air will cause discomfort to the scalp and is inconvenient to use. The above distances are optimal distances.

Referring to FIGS. 1 to 4 , the above-mentioned embodiments of the present invention further include that the length of the columnar laminar airflow enhanced by the wind pressure is 5 cm-20 cm. This embodiment is 14cm, that is, it starts from 14cm and ends at 28cm, and the total length is 14cm. The above-mentioned size satisfies the use of the hair dryer, that is, the effective use section of the present invention is 5cm-20cm. The wind pressure in this section is intensified and is at its highest.

Referring to FIG. 1 to FIG. 4 , the above-mentioned embodiment of the present invention further includes that the diameter of the central air outlet hole 20 is 2.0mm-3.0mm. This embodiment is 2.5mm. The specific distance is adjusted by controlling the aperture of the central air outlet hole 20. In this embodiment, the aperture is 2.5 mm, so that the specific distance is 14 cm, and the columnar laminar airflow starts from 14 cm and ends at 28 cm, forming an effective use. part. The shape of the central air outlet hole 20 in the present invention is a geometric shape such as a circle, a triangle, a polygon, an ellipse or a five-pointed star.

Referring to FIGS. 1 to 4 , the above-mentioned embodiments of the present invention further include that an annular air duct 101 communicated with the annular air outlet 10 is provided in the air duct 1 , and an annular air duct 101 is arranged in the air duct 1 . In the central air duct 201 communicating with the central air outlet 20, the high-speed airflow inside the air duct 1 enters the annular air duct 101 and the central air duct 201 respectively. In the present invention, the same high-speed airflow in the air duct 1 is divided into two parts, a large part of which enters the annular air duct 101 , and a small part enters the central air duct 201 . Two parts of high-speed airflow are blown out through the annular air outlet 10 and the central air outlet 20 respectively, so that a columnar laminar airflow with enhanced wind pressure can be formed after a certain distance. The annular air duct 101 and the central air duct 201 are isolated from each other to form an independent channel.

Referring to FIGS. 1 to 4 , the above-mentioned embodiments of the present invention further include that an air guide member 4 is provided in the inner cavity of the front end of the air duct 1 , and the outer periphery of the air guide member 4 is formed with the annular shape. The air duct 101, the annular air outlet 10 is formed on the periphery of the front end of the air guide 4, the center air duct 201 is formed in the center of the air guide 4, and the center outlet is formed in the center of the front end of the air guide 4. Air holes 20. In the present invention, the above-mentioned air outlet structure is formed by the air guide member 4, which is convenient for processing and installation.

Referring to FIGS. 1 to 4 , the above-mentioned embodiment of the present invention further includes that the air guide 4 includes an outer wall 43 and an inner wall 44 , and the annular shape is formed between the outer wall 43 and the inner wall 44 In the air duct 101 , the front end of the outer wall 43 forms an inward arc portion 431 , the front end of the inner wall 44 forms an outward arc portion 441 , and the two arc portions are arranged opposite to form the annular air outlet 10 , the annular air outlet 10 is an annular slot structure. The annular air outlet 10 in the present invention is composed of two arc-shaped parts, which is beneficial to guide the air and make the air blow out more smoothly. The annular air outlet 10 of the present invention has an annular slot structure, so that the high-speed airflow can be blown out a certain distance to form a use section with enhanced wind pressure.

Referring to FIGS. 1 to 4 , the above-mentioned embodiments of the present invention further include that the arc-shaped portions 431 and 441 are flow guide surfaces composed of multi-segment arc-surface structures. The above structure further improves the air guiding effect.

Referring to FIGS. 1 to 4 , the above-mentioned embodiments of the present invention further include that an inner cavity is formed in the middle of the air guide member 4 , and an air inlet hole 45 is provided at the rear end of the inner cavity of the air guide member 4 , The front end is provided with the central air outlet hole 20 . The central inner cavity of the air guide 4 is the central air duct 201 . The high-speed airflow in the air duct 1 enters the central air duct 201 through the air inlet hole 45 , and finally passes through the central air outlet hole 20 . blow out.

Referring to FIGS. 1 to 4 , the above-mentioned embodiment of the present invention further includes that a bell mouth 47 is formed in the middle of the front end of the air guide 4 , and the central air outlet 20 is located in the center of the bell mouth 47 . The bell mouth 47 acts as a guide for the air flow blown out of the central air outlet 20 , so that the air flow blown out of the central air outlet 20 is better mixed with the air flow blown out of the annular air outlet 10 .

Referring to FIGS. 1 and 2 , the above-mentioned embodiments of the present invention further include that a heating assembly 5 is provided between the outer wall 43 and the inner wall 44 , and the heating assembly 5 is located in the annular air duct 101 . The heating assembly 5 is composed of a plurality of sheet-like heating sheets, which are clamped on the inner wall 44 . The heating assembly 5 heats the airflow in the annular air duct 101 . In the present invention, the outer wall 43 is the outer shell of the air guide member 4 , and the inner wall 44 may be an integral structure or may be composed of multiple components. In this embodiment, the inner wall 44 is composed of the support frame of the heating assembly 5 and a part of the inner wall connected with the outer wall 43 . The heating assembly 5 is first installed on the support frame, and then the support frame is clamped into the part. on the inner wall, so that the support frame becomes a part of the inner wall. The above structure facilitates the installation of the heating assembly 5 .

Referring to Figure 1, Figure 2, Figure 5 and Figure 15, the above-mentioned embodiments of the present invention further include that a cover 6 is provided at the rear end of the air duct 1, and the cover 6 closes the wind the rear end of the barrel 1. The cover 6 is fastened to the rear end of the air duct 1 so as to close the rear end of the air duct 1 and prevent natural wind from entering. The cover 6 is connected to the air duct 1 through a connecting piece 60 . A sealing strip 601 is provided between the connecting member 60 , the air duct 1 and the cover 6 . The connecting piece 60 of the present invention plays the role of connecting the cover 6 and the air duct 1 , and the connecting piece 60 facilitates the installation of the two-part structure and makes the connection more firm. The sealing strip 601 acts as a seal to prevent air leakage.

Referring to FIGS. 5 and 15 , the above-mentioned embodiment of the present invention further includes that the cover 6 is provided with a power button 61 and a plurality of indicator bars 62 located around the power button 61 . The power button 61 is used to control the power on and off. There are two indicator bars 62, one for temperature indication and the other for wind speed indication. The two indicator bars 62 are arc-shaped, and light up in different lengths according to the size. The indicator light bar 62 is composed of a plurality of light sources and a guide ring matched with the light sources. The guide ring disperses the light source into a multi-segment structure, so that the lighting is more beautiful. A circuit board 63 is mounted on the connector 60 , a host switch 631 is disposed on the circuit board 63 , and the power button 61 abuts against the host switch 631 . A recessed portion 69 is formed on the cover 6 , the power button 61 is arranged in the recessed portion 69 , and a sealing disc 68 is also arranged between the power button 61 and the host switch 631 . In the present invention, the circuit board 63 is fixed on the connector 60, and various circuits are provided on the circuit board 63 for controlling the operation of the hair dryer. In the present invention, the power button 61 is arranged on the cover 6 for easy operation. The recessed portion 69 makes the overall appearance more beautiful, and the power button 61 is installed in the recessed portion 69 so as not to be misoperated. The sealing disc 68 seals the through hole at the power button 61 to prevent air leakage.

Referring to FIG. 2 , the above-mentioned embodiment of the present invention further includes that a circuit board 63 is mounted on the inner side of the cover 6 , and a negative ion generating device 64 is provided on the circuit board 63 . The negative ion generating device 64 faces the air duct 1 , the negative ion head 641 in the negative ion generating device 64 is located in the central air duct 201 , and the negative ions are blown out through the central air outlet 20 .

Referring to FIG. 2 , the above-mentioned embodiment of the present invention further includes that the central air duct 201 is provided with a water ion structure 65 , and the water ion structure 65 is a water ion structure using a temperature difference condensing structure to form a water ion structure. The high-speed airflow is dispersed and blown out through the central air outlet 20 . Both the negative ion generating device and the water ion structure in the present invention belong to mature structures, and their working principles will not be repeated here.

1 , 6 , 13 and 14 , the above-mentioned embodiment of the present invention further includes that the shell of the handle 2 is a double-layer structure, including a main shell 21 located on the inner layer and a main shell 21 located on the inner layer. The decorative shell 22 outside the main shell 21, the upper part of the main shell 21 forms an inclined part 23, and a accommodating space is formed between the inclined part 23 and the decorative shell 22, and the accommodating space is provided with Push button switch 24. A main air duct is formed in the main casing 21 , an air inlet structure is arranged on the handle 2 , and a filter screen is arranged at the air inlet structure. The present invention is provided with an inclined portion 23, and the inclined portion 23 and the decorative shell 22 will form an accommodating space, thereby providing an installation space for the installation of the button switch 24, and the button switch 24 will not be inserted into the main air duct, nor It will cause damage to the main air duct, so it is not necessary to specially set up a sealing structure, and seal the installation place of the button switch 24 . The above structure makes the installation of the button switch 24 more convenient, and also provides a sealing effect.

Referring to FIGS. 13 and 14 , the above-mentioned embodiment of the present invention further includes that a fixing column 231 is provided on the inclined portion 23 , a fixing frame 232 is installed on the fixing column 231 , and the button switch 24 is installed on the fixing frame 232 . The fixing frame 232 facilitates the installation of the push button switch 24 and makes the structure more stable.

6 , 9 , 13 and 14 , the above-mentioned embodiment of the present invention further includes that the main housing 21 includes a handle upper cover 211 and a handle lower cover 212 , and the handle upper cover 211 is connected with the handle upper cover 211 . The handle lower covers 212 are snapped together. The upper section of the handle lower cover 212 is provided with a sealing strip 213, and the sealing strip 213 is fixed on the handle lower cover 212 through a secondary injection molding process. The handle upper cover 211 is provided with a groove 214 matched with the sealing strip 213 , and the sealing strip 213 is snapped into the groove 214 . In the present invention, the thickness of the main casing 21 is relatively thin, and the sealing strip 213 is difficult to fix and difficult to locate, and the sealing effect is poor. In the present invention, after the injection molding of the main casing 21 is completed, the sealing strip 213 is injection molded on the handle lower cover 212 through a secondary injection molding process, and the sealing strip 213 and the handle lower cover 212 form an integral structure , the sealing strip 213 is not easy to be detached, and will not be displaced, which is convenient for installation and has a better sealing effect.

Referring to FIGS. 10 to 12 , in the above-mentioned embodiment of the present invention, the sealing strip 213 includes a straight line segment 214 located on both sides and an arc-shaped segment 215 connecting the two straight line segments 214 . The straight section 214 is located on the side end of the handle lower cover 212 , and the arc section 215 is located on the inner wall of the handle lower cover 212 . The above-mentioned structure of the present invention is exactly where the fan assembly is located, where the main air duct in the handle 2 is formed, so the sealing strip 213 can seal this place to prevent air leakage.

Referring to FIGS. 10 to 12 , the above-mentioned embodiment of the present invention further includes that the handle upper cover 211 is provided with a groove matched with the linear segment 214 , and the linear segment 214 is snapped into the In the groove, the arc-shaped section 215 is inserted into the clamping groove 216 on the lower connecting section of the air duct 1 . The upper ends of the handle upper cover 211 and the handle lower cover 212 are fastened to the lower connecting section of the air duct 1, and the arc-shaped section 215 can seal the connection to provide a sealing effect.

Referring to FIG. 9 , the above-mentioned embodiment of the present invention further includes that the decorative shell 22 is an integrally injection-molded cylindrical structure, and the decorative shell 22 is sheathed outside the main casing 21 . In the present invention, the main casing 21 adopts an upper and lower half structure, which facilitates the installation of internal components. The decorative shell 22 is an integral injection molding structure, which is more beautiful and has a good hand feeling.

Referring to FIG. 2 and FIG. 7 , the above-mentioned embodiments of the present invention further include that an annular guide ring 71 and a light source 72 corresponding to the annular guide ring 71 are disposed at the front end of the wind barrel 1 . The annular guide aperture 71 and the light source 72 form an annular aperture, which not only plays an indication role, but also makes the whole more beautiful. The annular guide aperture 71 can disperse the point light source 72 to form a continuous aperture. The material of the annular guide ring 71 is made by adding a diffusing agent to plastic. The light source 72 includes a ring circuit board and a plurality of indicator lights arranged on the ring circuit board. The circuit board is used to fixedly install the indicator lights, and the indicator lights are distributed on the circuit board in a circular shape.

To sum up, the above content is only an embodiment of the present invention, and is only used to illustrate the principle of the present invention, but not to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A hair dryer, comprising a handle connected with an air duct and the air duct, a fan assembly is provided in the handle, and it is characterized in that: the front end of the air duct is an air outlet, and the The rear end is closed, an annular air outlet is formed on the periphery of the front end of the air duct, and a central air outlet is formed in the center of the front end of the air duct. The air outlet blows out, and the airflow blown from the annular air outlet and the air stream blown from the central air outlet are mixed to form a columnar laminar airflow with enhanced wind pressure after passing a certain distance. 2 . The hair dryer according to claim 1 , wherein the air flow blown from the annular air outlet and the air flow blown from the central air outlet are mixed to form a columnar layer with enhanced wind pressure after passing through 14 cm. 3 . flow airflow. 3 . The hair dryer according to claim 1 , wherein the length of the columnar laminar airflow enhanced by the wind pressure is 5cm-20cm. 4 . 4 . The hair dryer according to claim 1 , wherein the diameter of the central air outlet hole is 2.0mm-3.0mm. 5 . 5 . The hair dryer according to claim 1 , wherein an annular air duct communicated with the annular air outlet is arranged in the air duct, and an annular air duct is arranged in the air duct and is connected to the center outlet. 6 . A central air duct connected with air holes, and the high-speed airflow inside the air duct enters the annular air duct and the central air duct respectively. 6 . The hair dryer according to claim 5 , wherein an air guide member is provided in the inner cavity of the front end of the air duct, and the annular air duct is formed on the periphery of the air guide member. 7 . The annular air outlet is formed at the periphery of the front end of the air guide, the center of the air guide is formed with a central air duct, and the center of the front end of the air guide is formed with a central air outlet. 7 . The hair dryer according to claim 6 , wherein the air guide member comprises an outer wall and an inner wall, the annular air duct is formed between the outer wall and the inner wall, and the outer wall The front end of the inner wall forms an inward arc portion, the front end of the inner wall forms an outward arc portion, and the two arc portions are arranged opposite to form the annular air outlet, and the annular air outlet is an annular sandwich structure. 8 . The hair dryer according to claim 7 , wherein the arc-shaped portion is a flow-guiding surface composed of a multi-segment arc structure. 9 . 9 . The hair dryer according to claim 7 , wherein an inner cavity is formed in the middle of the air guide member, the rear end of the inner cavity of the air guide member is provided with an air inlet hole, and the front end is provided with an air inlet hole. 10 . the center vent hole. 10 . The hair dryer according to claim 6 , wherein a bell mouth is formed in the middle of the front end of the air guide member, and the central air outlet is located at the center of the bell mouth. 11 .

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