Air duct structure of a high-speed hair dryer

Abstract

An air duct structure of a high-speed hair dryer comprises a hair dryer main body, the hair dryer main body comprising a handle and a hair dryer cylinder body, the hair dryer cylinder body being composed of an outer casing and an inner casing, an annular cavity being formed between the outer casing and the inner casing, an air outlet being disposed between front ends of the outer casing and the inner casing; a rear end cover being disposed between rear ends of the outer casing and the inner casing, an opening being provided in the central lower portion of the outer casing for connection with the handle; a high-speed fan being installed inside the handle, the inner handle communicating with the annular cavity via the opening in the central lower portion of the outer casing;characterized in that a sealing partition plate is arranged between the outer casing and the inner casing, the sealing partition plate dividing the annular cavity between the outer casing and the inner casing into a front chamber and a rear chamber, the front chamber communicating with the interior of the handle and forming the main air channel, an air inlet opening being provided at the rear end cover, and a through opening being provided at the rear chamber of the inner casing so that the rear chamber communicates with the central cavity of the hair dryer cylinder body and thus forms a secondary air channel.;

Description

Technical area

[0001] The present utility model relates to the technical field of household appliances, in particular to an air duct structure of a high-speed hair dryer. Background technology

[0002] A hair dryer is a commonly used small household appliance primarily used for drying hair. Due to their structural design and the limitations of the fan, conventional hair dryers have a comparatively low wind speed; hair drying is essentially achieved by hot air at high temperatures. However, this combination of low speed and high temperature can cause hair damage and impair hair quality. Therefore, a high-speed hair dryer is a better choice. Currently, there are hair dryers on the market with higher wind speeds, the design of which is significantly different from conventional models. These devices have a high-speed fan in the handle, with an annular air duct provided within the hair dryer cylinder body that communicates with the interior of the handle.Electric heating wires are also installed in the annular air duct to heat the outgoing air. During operation, the high-speed fan draws in air from the bottom of the handle, directs it through the annular air duct in the hair dryer cylinder body, and finally blows it out. This design achieves a higher wind speed, allowing hair to be dried quickly without requiring excessively high temperatures. In current high-speed hair dryers, the annular air duct in the hair dryer cylinder body communicates with the handle centrally. The air generated by the high-speed fan in the handle flows into the annular air duct and exits predominantly from the front air outlet of the annular air duct.The rear end of the annular air duct houses the control board, which results in airflow disruption upon entering the annular air duct, affecting the speed of the air exiting the air outlet. Furthermore, the control board at the rear end of the annular air duct cannot be sufficiently cooled during operation and is even exposed to heat radiation from the electric heating elements at the front end of the annular air duct. Extended operation can therefore lead to overheating of the control board, which negatively impacts the performance of the hair dryer. Content of the utility model

[0003] The purpose of the utility model is to provide an air duct structure of a high-speed hair dryer, in particular to provide an air duct structure of a high-speed hair dryer for cooling the control board at the rear end of the hair dryer cylinder body and for increasing the air speed in the main air duct at the front end of the hair dryer cylinder body.

[0004] To achieve the above-mentioned purpose, the present utility model applies the following technical concept: An air duct structure of a high-speed hair dryer comprises a hair dryer main body, the hair dryer main body comprising a handle and a hair dryer cylinder body, the hair dryer cylinder body being composed of an outer casing and an inner casing, an annular cavity being formed between the outer casing and the inner casing, an air outlet being arranged between front ends of the outer casing and the inner casing; a rear end cover being arranged between rear ends of the outer casing and the inner casing, an opening being provided in the central lower region of the outer casing for connection to the handle;wherein a high-speed fan is installed inside the handle, the inner handle communicating with the annular cavity via the opening in the central lower region of the outer casing; characterized in that a sealing partition plate is arranged between the outer casing and the inner casing, the sealing partition plate dividing the annular cavity between the outer casing and the inner casing into a front chamber and a rear chamber, the front chamber communicating with the interior of the handle and forming the main air duct, an air inlet opening being provided at the rear end cover, and a through-hole being provided at the rear chamber of the inner casing so that the rear chamber communicates with the central part cavity of the hair dryer cylinder body, thus forming a secondary air duct.

[0005] In particular, a main control board is provided in the rear chamber, a wiring hole is provided in the seal partition plate, a switching control board and a power line are installed inside the handle, and the power line, the switching control board, and the high-speed fan inside the handle are electrically connected to the main control board in the rear chamber via the wiring hole on the seal partition plate.

[0006] In particular, the front chamber has an electrical heating device, wherein the electrical heating device is electrically connected to the main control board in the rear chamber via a line opening in the seal separator plate.

[0007] In particular, the rear end cover comprises an annular end cover portion and a protective shield portion, wherein the annular end cover portion is connected between the outer housing and the inner housing, wherein the protective shield portion is connected to the rear end of the inner housing and is extended rearwardly beyond the annular end cover portion, wherein an air inlet gap is provided between the protective shield portion and the annular end cover portion.

[0008] In particular, a first protective grille is attached to the annular end cover portion, wherein the openings of the first protective grille serve as air inlet openings of the rear end cover.

[0009] In particular, the inner housing is provided with a second protective grille at the through opening arranged on the rear chamber.

[0010] In particular, the sealing separating plate comprises a mounting bracket portion and an air duct portion, wherein the mounting bracket portion is annularly shaped and connected to the inside of the outer casing, wherein the air duct portion is funnel-shaped and connected between the mounting bracket portion and the inner casing.

[0011] In particular, the main control board is attached to the back of the mounting bracket section.

[0012] Advantageous effects of the utility model include the fact that the annular cavity between the outer casing and the inner casing is separated into a front chamber and a rear chamber by the arrangement of the sealing partition plate between the outer casing and the inner casing. On the one hand, the front chamber serves as the main air duct, preventing the airflow from the handle from being influenced by the rear chamber, which leads to an increase in wind speed. On the other hand, a through-hole is provided in the inner casing that communicates with the rear chamber. Thus, the rear chamber communicates with the cavity in the center of the hair dryer cylinder body, forming a secondary air duct that contributes to cooling the control board in the rear chamber. Illustration of the attached drawings Fig. 1 shows a schematic overall structure of the high-speed hair dryer according to Embodiment 1; Fig. 2 shows a side sectional view of the high-speed hair dryer according to Embodiment 1; Fig. 3 shows an enlarged partial view of area A in Fig. 2; Fig. 4-8 each show the internal exploded view of the high-speed hair dryer according to Embodiment 1; Fig. 9 is a schematic diagram of the main air duct of the high-speed hair dryer according to Embodiment 1; Fig. 10 is a schematic diagram showing the secondary air passage of the high-speed hair dryer according to Embodiment 1; Fig. 11 shows a schematic diagram of the second secondary air duct of the high-speed hair dryer according to Embodiment 1. Specific embodiments

[0013] An air duct structure of a high-speed hair dryer in Embodiment 1 with reference to Fig.1-11 comprises a hair dryer main body, the hair dryer main body comprising a handle 1 and a hair dryer cylinder body 2, the hair dryer cylinder body 2 consisting of an outer casing 21 and an inner casing 22, an annular cavity 3 being formed between the outer casing 21 and the inner casing 22, an air outlet 23 being arranged between front ends of the outer casing 21 and the inner casing 22; a rear end cover 4 being arranged between rear ends of the outer casing 21 and the inner casing 22, an opening being provided in the central lower region of the outer casing 21 for connection with the handle 1; a high-speed fan 11 being installed inside the handle 1, the inner handle 1 communicating with the annular cavity 3 via the opening in the central lower region of the outer casing 21;characterized in that a sealing partition plate 5 is arranged between the outer housing 21 and the inner housing 22, wherein the sealing partition plate 5 divides the annular cavity 3 between the outer housing 21 and the inner housing 22 into a front chamber 31 and a rear chamber 32, wherein the front chamber 31 communicates with the interior of the handle 1 and forms the main air channel, wherein an air inlet opening is provided on the rear end cover 4, wherein a through opening is provided at the rear chamber 32 of the inner housing 22 so that the rear chamber 32 communicates with the central part cavity 20 of the hair dryer cylinder body 2 and thus forms a secondary air channel. In this embodiment, the rear end of the inner housing 22 is designed to be open from the hair dryer cylinder body 2, wherein the central part cavity 20 of the hair dryer cylinder body 2 forms a second secondary air channel.

[0014] In this embodiment, an annular cavity 3 is formed between the outer casing 21 and the inner casing 22, which is divided into a front chamber 31 and a rear chamber 32 by the sealing partition plate 5. The front chamber 31 communicates with the interior of the handle 1 via an opening at the lower end of the outer casing 21 and forms the main air duct. Since the front chamber 31 and the rear chamber 32 do not communicate with each other, the air discharged from the high-speed fan 11 flows upward into the front chamber 31 without being disturbed by the rear chamber and is directly discharged from the air outlet 23. This increases the speed of the air discharged from the main air duct and improves the drying effect. In addition, when the hair dryer is operating, the air flow velocity and pressure at the air outlet 23 are high.This creates a negative pressure at the front end of the central cavity 20 of the hair dryer cylinder body 2, causing outside air to enter the central cavity 20 of the hair dryer cylinder body 2 via the secondary air duct—that is, flowing into the rear chamber 32 through the air inlet opening on the rear end cover 4—and be blown out of the front end. At the same time, air also flows through a second secondary air duct, with air entering the hair dryer cylinder body 2 from the rear end of the central cavity 20 and exiting the front end.A main control board 6 is provided in the rear chamber 32, and a wiring hole 50 is provided in the sealing partition plate 5. A switching control board 12 and a power line 13 are installed inside the handle 1. The power line 13, the switching control board 12, and the high-speed fan 11 inside the handle 1 are electrically connected to the main control board 6 in the rear chamber 32 via the wiring hole 50 on the sealing partition plate 5. The air blown through the secondary air duct ventilates and cools the main control board 6 in the rear chamber 32, which contributes to the stable operation of the hair dryer and extends its service life. At the same time, the front chamber 31 has an electric heater 7, which is electrically connected to the main control board 6 in the rear chamber 32 via a wiring hole 50 in the sealing partition plate 5.The air flow blown out by the high-speed fan 11 first enters the front chamber 31, is heated there by the electric heater 7 and then blown out, whereby the exit of warm air flow with a certain temperature is achieved.

[0015] Specifically, in this embodiment, the rear end cover 4 includes an annular end cover portion 41 and a protective screen portion 42. The annular end cover portion 41 is connected between the outer casing 21 and the inner casing 22. The protective screen portion 42 is connected to the rear end of the inner casing 22 and extends rearward beyond the annular end cover portion 41. An air inlet gap 43 is provided between the protective screen portion 42 and the annular end cover portion 41. A first protective grille 44 is attached to the annular end cover portion 41, and the openings of the first protective grille 44 serve as air inlet openings of the rear end cover 4.When the hair dryer is in operation, outside air flows into the rear chamber 32 through the air inlet gap 43 between the annular end cover portion 41 and the protective screen portion 42, as well as through the first protective grille 44 on the annular end cover portion 41. The first protective grille 44 on the annular end cover portion 41 prevents foreign matter from entering the rear chamber 32, while the protective screen portion 42 protects the annular end cover portion 41, in particular the first protective grille 44 on the annular end cover portion 41. Furthermore, a second protective grille 24 is attached to the inner housing 22 at the through-opening of the rear chamber 32. The second protective grille 24 prevents external foreign matter from entering the rear chamber 32.

[0016] Furthermore, the seal separation plate 5 comprises a mounting bracket section 51 and an air duct section 52. The mounting bracket section 51 is annular and connected to the inside of the outer housing 21, and the air duct section 52 is funnel-shaped and connected between the mounting bracket section 51 and the inner housing 22. The main control board 6 is mounted on the back of the mounting bracket section 51. The air duct section 52 of the seal separation plate 5 is funnel-shaped, which allows the air flow blown from the inside of the handle into the front chamber 31 to be directed so that, after entering the front chamber 31, it is deflected upwards under the guidance of the air duct section 52 toward the side of the front chamber 31 and exits through the air outlet 23 at the front end. This leads to a further increase in the blowing speed in the main air duct.On the other hand, the side of the air guide section 52 facing the rear chamber 32 can direct the air entering the rear chamber 32 so that it enters the central cavity 20 of the hair dryer cylinder body 2 through the through-opening of the inner housing 22. This ensures effective airflow control.

[0017] Embodiment 2 discloses an air duct structure of a high-speed hair dryer, comprising a hair dryer main body, the hair dryer main body comprising a handle 1 and a hair dryer cylinder body 2, the hair dryer cylinder body 2 being composed of an outer casing 21 and an inner casing 22, an annular cavity 3 being formed between the outer casing 21 and the inner casing 22, an air outlet 23 being disposed between front ends of the outer casing 21 and the inner casing 22; a rear end cover 4 being disposed between rear ends of the outer casing 21 and the inner casing 22, an opening being provided in the central lower portion of the outer casing 21 for connection with the handle 1;wherein a high-speed fan 11 is installed inside the handle 1, the inner handle 1 communicating with the annular cavity 3 via the opening in the middle lower region of the outer casing 21;characterized in that a sealing partition plate 5 is arranged between the outer housing 21 and the inner housing 22, wherein the sealing partition plate 5 divides the annular cavity 3 between the outer housing 21 and the inner housing 22 into a front chamber 31 and a rear chamber 32, wherein the front chamber 31 communicates with the interior of the handle 1 and forms the main air channel, wherein an air inlet opening is provided on the rear end cover 4, wherein a through opening is provided at the rear chamber 32 of the inner housing 22 so that the rear chamber 32 communicates with the central part cavity 20 of the hair dryer cylinder body 2 and thus forms a secondary air channel. In this embodiment, the rear end of the inner housing 22 is designed to be closed by the hair dryer cylinder body 2.;

[0018] In this embodiment, an annular cavity 3 is formed between the outer casing 21 and the inner casing 22, which is divided into a front chamber 31 and a rear chamber 32 by the sealing partition plate 5. The front chamber 31 communicates with the interior of the handle 1 via an opening at the lower end of the outer casing 21 and forms the main air duct. Since the front chamber 31 and the rear chamber 32 do not communicate with each other, the air discharged from the high-speed fan 11 flows upward into the front chamber 31 without being disturbed by the rear chamber and is directly discharged from the air outlet 23. This increases the speed of the air discharged from the main air duct and improves the drying effect. In addition, when the hair dryer is operating, the air flow velocity and pressure at the air outlet 23 are high.This creates a negative pressure at the front end of the central cavity 20 of the hair dryer cylinder body 2, causing outside air to enter the central cavity 20 of the hair dryer cylinder body 2 via the secondary air duct—that is, flowing into the rear chamber 32 through the air inlet opening on the rear end cover 4—and be blown out from the front end thereof. A main control board 6 is provided in the rear chamber 32, and a wiring hole 50 is provided in the seal partition plate 5. A switching control board 12 and a power line 13 are installed inside the handle 1. The power line 13, the switching control board 12, and the high-speed fan 11 inside the handle 1 are electrically connected to the main control board 6 in the rear chamber 32 via the wiring hole 50 on the seal partition plate 5.The air blown through the secondary air duct ventilates and cools the main control board 6 in the rear chamber 32, contributing to the stable operation of the hair dryer and extending its service life. At the same time, the front chamber 31 includes an electric heater 7, which is electrically connected to the main control board 6 in the rear chamber 32 via a duct opening 50 in the sealing partition plate 5. The airflow blown out by the high-speed fan 11 first enters the front chamber 31, is heated there by the electric heater 7, and then blown out, thereby achieving the discharge of warm airflow at a specific temperature.

[0019] Specifically, in this embodiment, the rear end cover 4 includes an annular end cover portion 41 and a protective screen portion 42. The annular end cover portion 41 is connected between the outer casing 21 and the inner casing 22. The protective screen portion 42 is connected to the rear end of the inner casing 22 and extends rearward beyond the annular end cover portion 41. An air inlet gap 43 is provided between the protective screen portion 42 and the annular end cover portion 41. A first protective grille 44 is attached to the annular end cover portion 41, and the openings of the first protective grille 44 serve as air inlet openings of the rear end cover 4.When the hair dryer is in operation, outside air flows into the rear chamber 32 through the air inlet gap 43 between the annular end cover portion 41 and the protective screen portion 42, as well as through the first protective grille 44 on the annular end cover portion 41. The first protective grille 44 on the annular end cover portion 41 prevents foreign matter from entering the rear chamber 32, while the protective screen portion 42 protects the annular end cover portion 41, in particular the first protective grille 44 on the annular end cover portion 41. Furthermore, a second protective grille 24 is attached to the inner housing 22 at the through-opening of the rear chamber 32. The second protective grille 24 prevents external foreign matter from entering the rear chamber 32.

[0020] Furthermore, the seal separation plate 5 comprises a mounting bracket section 51 and an air duct section 52. The mounting bracket section 51 is annular and connected to the inside of the outer housing 21, and the air duct section 52 is funnel-shaped and connected between the mounting bracket section 51 and the inner housing 22. The main control board 6 is mounted on the back of the mounting bracket section 51. The air duct section 52 of the seal separation plate 5 is funnel-shaped, which allows the air flow blown from the inside of the handle into the front chamber 31 to be directed so that, after entering the front chamber 31, it is deflected upwards under the guidance of the air duct section 52 toward the side of the front chamber 31 and exits through the air outlet 23 at the front end. This leads to a further increase in the blowing speed in the main air duct.On the other hand, the side of the air guide section 52 facing the rear chamber 32 can direct the air entering the rear chamber 32 so that it enters the central cavity 20 of the hair dryer cylinder body 2 through the through-opening of the inner housing 22. This ensures effective airflow control.

[0021] Of course, the above description represents only a preferred embodiment of the present utility model application and is not intended to limit the scope of application of this utility model. Therefore, all equivalent modifications based on the principle of this utility model are also included within the scope of protection of this utility model.

[0022] The present utility model relates to the technical field of household appliances, in particular to an air duct structure of a high-speed hair dryer. The following technical solution is adopted: It comprises a hair dryer main body, the hair dryer main body comprising a handle and a hair dryer cylinder body, the hair dryer cylinder body consisting of an outer casing and an inner casing, an annular cavity being formed between the outer casing and the inner casing, a sealing partition plate being arranged between the outer casing and the inner casing, the sealing partition plate dividing the annular cavity between the outer casing and the inner casing into a front chamber and a rear chamber.The advantageous effect is that the annular cavity between the outer casing and the inner casing is divided into a front chamber and a rear chamber by the arrangement of the sealing separation plate between the outer casing and the inner casing. On the one hand, the front chamber serves as the main air duct, preventing the airflow from the handle from being influenced by the rear chamber, which leads to an increase in wind speed. On the other hand, a through hole is provided in the inner casing that communicates with the rear chamber. This connects the rear chamber to the cavity in the center of the hair dryer cylinder body, forming a secondary air duct that contributes to cooling the main control board in the rear chamber.

Claims

[1] An air duct structure of a high-speed hair dryer comprises a hair dryer main body, the hair dryer main body comprising a handle and a hair dryer cylinder body, the hair dryer cylinder body being composed of an outer casing and an inner casing, an annular cavity being formed between the outer casing and the inner casing, an air outlet being disposed between front ends of the outer casing and the inner casing; a rear end cover being disposed between rear ends of the outer casing and the inner casing, an opening being provided in the central lower portion of the outer casing for connection with the handle; a high-speed fan being installed inside the handle, the inner handle communicating with the annular cavity through the opening in the central lower portion of the outer casing; characterized bythat a sealing partition plate is arranged between the outer casing and the inner casing, wherein the sealing partition plate divides the annular cavity between the outer casing and the inner casing into a front chamber and a rear chamber, wherein the front chamber communicates with the interior of the handle and forms the main air channel, wherein an air inlet opening is provided on the rear end cover, wherein a through opening is provided at the rear chamber of the inner casing so that the rear chamber communicates with the central part cavity of the hair dryer cylinder body and thus forms a secondary air channel. [2] Air duct structure of a high-speed hair dryer according to claim 1, characterized bythat a main control board is provided in the rear chamber, wherein a line opening is provided in the seal separation plate, wherein a switching control board and a power line are installed inside the handle, wherein the power line, the switching control board and the high-speed fan inside the handle are electrically connected to the main control board in the rear chamber via the line opening on the seal separation plate. [3] Air duct structure of a high-speed hair dryer according to claim 2, characterized by that the front chamber has an electrical heating device, wherein the electrical heating device is electrically connected to the main control board in the rear chamber via a line opening in the seal separator plate. [4] Air duct structure of a high-speed hair dryer according to claim 1, characterized byin that the rear end cover comprises an annular end cover portion and a protective shield portion, the annular end cover portion being connected between the outer housing and the inner housing, the protective shield portion being connected to the rear end of the inner housing and being extended rearwardly beyond the annular end cover portion, an air inlet gap being provided between the protective shield portion and the annular end cover portion. [5] Air duct structure of a high-speed hair dryer according to claim 4, characterized by that a first protective grille is attached to the annular end cover section, wherein the openings of the first protective grille serve as air inlet openings of the rear end cover. [6] Air duct structure of a high-speed hair dryer according to claim 1, characterized bythat the inner housing is provided with a second protective grille at the through opening arranged on the rear chamber. [7] Air duct structure of a high-speed hair dryer according to claim 2, characterized by in that the sealing separating plate comprises a mounting bracket portion and an air duct portion, wherein the mounting bracket portion is annular and is connected to the inside of the outer housing, wherein the air duct portion is funnel-shaped and is connected between the mounting bracket portion and the inner housing. [8] Air duct structure of a high-speed hair dryer according to claim 7, characterized by that the main control board is attached to the back of the mounting bracket section.

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