Airway structure of high-speed hair dryer

Abstract

To provide an air passage structure for a high-speed hair dryer capable of dissipating heat from a control circuit board at the rear end of a cylinder of the hair dryer and improving the air velocity of the main air passage at the tip of the cylinder. [Solution] The hair dryer includes a handle 1 and a hair dryer body including a blower cylinder including an outer case 21 and an inner case 22, with an annular hollow space formed between the outer case and the inner case. A seal spacer is provided between the outer case and the inner case, and the seal spacer divides the annular hollow space formed between the outer case and the inner case into a front cavity and a rear cavity. The front cavity communicates with the interior of the handle to form a main air passage, and a rear end cover including an annular end cover portion 41 is provided with an intake hole, and a through-hole is provided in the rear cavity to communicate with the hollow in the central part of the blower cylinder to form a secondary air passage.

Description

[Technical Field]

[0001] This invention relates to the technical field of household appliances, and in particular to the air duct structure of a high-speed hair dryer. [Background technology]

[0002] Hair dryers are commonly used small household appliances, primarily used for drying hair. Due to limitations in their structure and blower, conventional hair dryers have a relatively low airflow rate. They generally rely on relatively high-temperature hot air to dry hair. However, high-temperature, low-speed airflow can damage hair and affect its quality. Therefore, high-speed hair dryers are a more preferable option. Currently available hair dryers with relatively high airflow rates differ significantly from conventional hair dryers in their structure. They incorporate a high-speed blower in the handle, forming a circular air passage within the barrel of the hair dryer and communicating with the interior of the handle. The circular air passage also incorporates a heating wire for heating the blown air. When the high-speed blower is in operation, it draws air into the lower end of the handle and then blows it out through the circular air passage in the barrel of the hair dryer. The air blown out from this structure has a higher airflow rate, enabling quick hair drying without requiring excessively high temperatures. In current high-speed hair dryers, the annular air passage formed within the air blower cylinder is connected to the handle at the center. After the air blown out from the high-speed blower in the handle enters the annular air passage, the airflow is mainly blown out from the air outlet at the front of the annular air passage, and the rear end of the annular air passage is used to install the control circuit board. As a result, the airflow is subject to certain disturbances after entering the annular air passage, which ultimately affects the speed at which it is blown out from the air outlet. In addition, the control circuit board at the rear end of the annular air passage does not dissipate heat well during operation, and is further subjected to heat radiation from the electric heating device at the front of the annular air passage. If it is operated for a long time, the control circuit board may overheat and affect the performance of the hair dryer. Summary of the Invention [Problem to be solved by the invention]

[0003] The purpose of this invention is to provide an air duct structure for a high-speed hair dryer, specifically, to provide an air duct structure for a high-speed hair dryer that can dissipate heat from the control circuit board at the rear end of the hair dryer barrel and improve the air speed of the main air duct at the front end of the hair dryer barrel. [Means for solving the problem]

[0004] To achieve the above object, the present invention adopts the following technical solution: a hair dryer body including a handle and a blower cylinder including an outer case and an inner case, wherein an annular hollow space is formed between the outer case and the inner case, an air outlet is formed between the front ends of the outer case and the inner case, a rear cover is disposed between the rear ends of the outer case and the inner case, an opening is disposed at the center of the lower end of the outer case and is connected to the handle, a high-speed blower is disposed inside the handle, and the inside of the handle is connected to the annular hollow space through the opening at the center of the lower end of the outer case, a sealing spacer is disposed between the outer case and the inner case, and the sealing spacer divides the annular hollow space formed between the outer case and the inner case into a front cavity and a rear cavity, the front cavity is connected to the inside of the handle to form a main air passage, the rear cover is provided with an intake hole, and the inner case is provided with a through-hole at the rear cavity to connect the rear cavity to the hollow in the center of the blower cylinder to form a secondary air passage.

[0005] Specifically, a main control circuit board is provided in the rear cavity, a routing hole is provided in the seal spacer, a switch control circuit board and a power line are provided inside the handle, and the power line, switch control circuit board and high-speed blower inside the handle are electrically connected to the main control circuit board in the rear cavity via the routing hole on the seal spacer.

[0006] Specifically, an electric heating device is provided in the front cavity, and the electric heating device is electrically connected to the main control circuit board in the rear cavity through a routing hole on the seal spacer.

[0007] Specifically, the rear end cover includes an annular end cover portion and a protective baffle portion, the annular end cover portion is connected between the outer case and the inner case, the protective baffle portion is connected to the rear end of the inner case and extends rearward to shield the rear of the annular end cover portion, and an intake gap is left between the protective baffle portion and the annular end cover portion.

[0008] Specifically, a first protective net is provided on the annular end cover portion, and holes on the first protective net serve as suction holes for the rear end cover.

[0009] Specifically, the inner case has a second protective net provided in a through hole provided at the rear cavity.

[0010] Specifically, the sealing partition plate includes an attachment frame portion and an air guide portion, the attachment frame portion being a circular ring portion connected to the inside of the outer case, and the air guide portion being a funnel-shaped portion connected between the attachment frame portion and the inner case.

[0011] Specifically, the main control circuit board is attached and fixed to the rear side of the mounting frame portion. [Effects of the Invention]

[0012] The beneficial effects of this device are as follows: By providing a sealing partition plate between the outer and inner cases, the annular hollow space between the outer and inner cases is divided into a front cavity and a rear cavity, and the front cavity serves as the main air passage, preventing the airflow blown out from the steering wheel from being influenced by the rear cavity, thereby improving air speed. On the other hand, by providing a through-hole in the inner case that connects to the rear cavity, the rear cavity is connected to the hollow space in the center of the blower cylinder, forming a secondary air passage and serving to dissipate heat from the control circuit board in the rear cavity. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing the overall structure of a high-speed hair dryer in Example 1. [Figure 2]FIG. 1 is a side cross-sectional view of a high-speed hair dryer in Example 1. [Figure 3] FIG. 3 is a partial enlarged view of a portion A in FIG. 2. [Figure 4] 1 is an exploded view of the internal structure of the high-speed hair dryer in Example 1. [Figure 5] 1 is an exploded view of the internal structure of the high-speed hair dryer in Example 1. [Figure 6] 1 is an exploded view of the internal structure of the high-speed hair dryer in Example 1. [Figure 7] 1 is an exploded view of the internal structure of the high-speed hair dryer in Example 1. [Figure 8] 1 is an exploded view of the internal structure of the high-speed hair dryer in Example 1. [Figure 9] FIG. 2 is a diagram showing the main air path of the high-speed hair dryer in Example 1. [Figure 10] FIG. 2 is a diagram showing a secondary air passage of the high-speed hair dryer in Example 1. [Figure 11] FIG. 2 is a diagram showing a second secondary air duct of the high speed hair dryer in Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0014] Example 1 1 to 11, the air passage structure of the high-speed hair dryer includes a hair dryer body including a handle 1 and an air blower cylinder 2 including an outer case 21 and an inner case 22, an annular hollow portion 3 is formed between the outer case 21 and the inner case 22, an air outlet 23 is formed between the tip of the outer case 21 and the inner case 22, a rear end cover 4 is provided between the rear end of the outer case 21 and the inner case 22, an opening is provided at the center of the lower end of the outer case 21 and is connected to the handle 1, a high-speed air blower 11 is provided inside the handle 1, and the inside of the handle 1 is connected to the outer case 2. The rear end cover 4 is provided with an intake hole, and the inner case 22 is provided with a through-hole at the rear cavity 32, which communicates with the hollow portion 20 in the center of the blower cylinder 2. In this embodiment, the rear end of the inner case 22 of the blower cylinder 2 is open, and the hollow portion 20 in the center of the blower cylinder 2 forms a second secondary air passage.

[0015] In this embodiment, the annular hollow portion 3 formed between the outer case 21 and the inner case 22 is divided into a front cavity 31 and a rear cavity 32 by the seal spacer 5. Of these, the front cavity 31 communicates with the interior of the handle 1 through an opening at the lower end of the outer case 21 to form the main air passage. Since the front cavity 31 and the rear cavity 32 do not communicate with each other, the air blown out from the high-speed blower 11 flows upward into the front cavity 31 and is then blown out directly from the air outlet 23 without being disturbed by the rear cavity. As a result, the air blown out from the main air passage The airflow speed is increased, improving the blowing effect. Furthermore, when the hair dryer is in operation, the high airflow speed and low air pressure at the outlet 23 create low pressure at the tip of the hollow section 20 in the center of the blower cylinder 2, causing the outside air to pass through the secondary air passage, i.e., enter the rear cavity 32 through the suction hole in the rear end cover 4, enter the hollow section 20 in the center of the blower cylinder 2, and then be blown out from the tip. The outside air also passes through the second secondary air passage, i.e., enters the rear end of the hollow section 20 in the center of the blower cylinder 2, and then be blown out from the tip. The main control circuit board 6 is located in the rear cavity 32, and the seal spacer 5 has a wiring hole 50. The handle 1 has a switch control circuit board 12 and a power line 13 inside. The power line 13, switch control circuit board 12, and high-speed blower 11 inside the handle 1 are electrically connected to the main control circuit board 6 in the rear cavity 32 through the wiring hole 50 in the seal spacer 5. The air blown out through the secondary air passage serves as ventilation and heat dissipation for the main control circuit board 6 in the rear cavity 32, improving the operational stability and extending the service life of the hair dryer. An electric heating device 7 is also provided in the front cavity 31, and the electric heating device 7 is electrically connected to the main control circuit board 6 in the rear cavity 32 through the routing hole 50 on the sealing spacer 5. The air blown out from the high-speed blower 11 enters the front cavity 31, is heated by the electric heating device 7, and is then blown out, achieving the effect of blowing hot air at a constant temperature.

[0016] Specifically, in this embodiment, the rear end cover 4 includes an annular end cover portion 41 and a protective baffle portion 42, the annular end cover portion 41 is connected between the outer case 21 and the inner case 22, the protective baffle portion 42 is connected to the rear end of the inner case 22 and extends rearward to shield the rear of the annular end cover portion 41, and an intake gap 43 is left between the protective baffle portion 42 and the annular end cover portion 41. Here, a first protective net 44 is provided on the annular end cover portion 41, and holes in the first protective net 44 serve as intake holes for the rear end cover 4. When the hair dryer is in operation, external air enters the rear cavity 32 through the suction gap 43 formed between the annular end cover part 41 and the protective baffle part 42 and through the first protective mesh 44 of the annular end cover part 41, whereby the first protective mesh 44 of the annular end cover part 41 can prevent foreign objects from entering the rear cavity 32, and the protective baffle part 42 can provide protection for the annular end cover part 41, especially for the first protective mesh 44 of the annular end cover part 41. In addition, a second protective mesh 24 is provided in the through-hole provided at the rear cavity 32 of the inner case 22, and the second protective mesh 24 can prevent foreign objects from entering the rear cavity 32.

[0017] Furthermore, the sealing partition plate 5 includes a mounting frame portion 51 and an air guide portion 52. The mounting frame portion 51 is annular and connected to the inside of the outer case 21. The air guide portion 52 is funnel-shaped and connected between the mounting frame portion 51 and the inner case 22. The main control circuit board 6 is attached and fixed to the rear side of the mounting frame portion 51. The air guide portion 52 of the sealing partition plate 5 is funnel-shaped and can guide the airflow blown into the front cavity 31 from inside the handle, and after entering the front cavity 31, can be guided by the side of the air guide portion 52 facing the front cavity 31 to be blown out to the front outlet 23, thereby further improving the air flow speed of the main air passage. Meanwhile, the side of the air guide portion 52 facing the rear cavity 32 can guide the air that has entered the rear cavity 32 and allow it to enter the hollow portion 20 in the center of the air blower cylinder 2 through the through-hole in the inner case 22, thereby fulfilling the role of an excellent airflow guide. Example 2

[0018] The air passage structure of the high-speed hair dryer includes a hair dryer body including a handle 1 and an air blower cylinder 2 including an outer case 21 and an inner case 22, an annular hollow portion 3 is formed between the outer case 21 and the inner case 22, an air outlet 23 is formed between the tip of the outer case 21 and the inner case 22, a rear end cover 4 is provided between the rear end of the outer case 21 and the inner case 22, an opening is provided at the center of the lower end of the outer case 21 and is connected to the handle 1, a high-speed air blower 11 is provided inside the handle 1, and the inside of the handle 1 is connected to the center of the lower end of the outer case 21. The rear end cover 4 is provided with an intake hole, and the inner case 22 is provided with a through-hole at the rear cavity 32, which communicates with the annular hollow portion 3 through an opening in the rear end cover 4. The seal spacer 5 is provided between the outer case 21 and the inner case 22. The seal spacer 5 divides the annular hollow portion 3 formed between the outer case 21 and the inner case 22 into a front cavity 31 and a rear cavity 32. The front cavity 31 communicates with the interior of the handle 1 to form a main air passage. The rear end cover 4 is provided with an intake hole, and the inner case 22 is provided with a through-hole at the rear cavity 32, which communicates with the hollow portion 20 in the center of the air blower cylinder 2 to form a secondary air passage. In this embodiment, the rear end of the inner case 22 of the air blower cylinder 2 is sealed.

[0019] In this embodiment, the annular hollow portion 3 formed between the outer case 21 and the inner case 22 is divided into a front cavity 31 and a rear cavity 32 by the seal spacer 5. Of these, the front cavity 31 communicates with the interior of the handle 1 through an opening at the bottom end of the outer case 21 to form a main air passage. Since the front cavity 31 and the rear cavity 32 do not communicate with each other, the air blown out from the high-speed blower 11 flows upward into the front cavity 31 and then directly without being disturbed by the rear cavity. The air is blown out from the air outlet 23, thereby increasing the speed of the air blown out from the main air passage and improving the air blowing effect. During operation of the hair dryer, the air flow velocity at the air outlet 23 is high and the air pressure is low, resulting in low pressure at the tip of the hollow section 20 in the central part of the air blower cylinder 2. As a result, the outside air passes through the secondary air passage, i.e., enters the rear cavity 32 through the suction hole in the rear end cover 4, enters the hollow section 20 in the central part of the air blower cylinder 2, and is then blown out from the tip. Here, a main control circuit board 6 is provided in the rear cavity 32, a routing hole 50 is provided in the seal spacer 5, and a switch control circuit board 12 and a power line 13 are provided inside the handle 1, and the power line 13, switch control circuit board 12, and high-speed blower 11 inside the handle 1 are electrically connected to the main control circuit board 6 in the rear cavity 32 via the routing hole 50 in the seal spacer 5. The air blown out through the secondary air passage serves as ventilation and heat dissipation for the main control circuit board 6 in the rear cavity 32, improving the operational stability and extending the service life of the hair dryer. An electric heating device 7 is also provided in the front cavity 31, and is electrically connected to the main control circuit board 6 in the rear cavity 32 through the routing hole 50 on the sealing spacer 5. The air blown out from the high-speed blower 11 enters the front cavity 31 and is heated by the electric heating device 7 before being blown out, achieving the effect of blowing hot air at a constant temperature.

[0020] Specifically, in this embodiment, the rear end cover 4 includes an annular end cover portion 41 and a protective baffle portion 42, the annular end cover portion 41 is connected between the outer case 21 and the inner case 22, the protective baffle portion 42 is connected to the rear end of the inner case 22 and extends rearward to shield the rear of the annular end cover portion 41, and an intake gap 43 is left between the protective baffle portion 42 and the annular end cover portion 41. Here, a first protective net 44 is provided on the annular end cover portion 41, and holes in the first protective net 44 serve as intake holes for the rear end cover 4. When the hair dryer is in operation, external air enters the rear cavity 32 through the suction gap 43 formed between the annular end cover part 41 and the protective baffle part 42 and the first protective mesh 44 of the annular end cover part 41, whereby the first protective mesh 44 of the annular end cover part 41 can prevent foreign objects from entering the rear cavity 32, and the protective baffle part 42 can protect the annular end cover part 41, especially the first protective mesh 44 of the annular end cover part 41. In addition, a second protective mesh 24 is provided in the through-hole provided at the rear cavity 32 of the inner case 22, and the second protective mesh 24 can prevent foreign objects from entering the rear cavity 32.

[0021] Furthermore, the sealing partition plate 5 includes a mounting frame portion 51 and an air guide portion 52. The mounting frame portion 51 is annular and connected to the inside of the outer case 21. The air guide portion 52 is funnel-shaped and connected between the mounting frame portion 51 and the inner case 22. The main control circuit board 6 is attached and fixed to the rear side of the mounting frame portion 51. The air guide portion 52 of the sealing partition plate 5 is funnel-shaped and can guide the airflow blown into the front cavity 31 from inside the handle, and after entering the front cavity 31, can be guided by the side of the air guide portion 52 facing the front cavity 31 to be blown out to the front outlet 23, thereby further improving the air flow speed of the main air passage. Meanwhile, the side of the air guide portion 52 facing the rear cavity 32 can guide the air that has entered the rear cavity 32 and allow it to enter the hollow portion 20 in the center of the air blower cylinder 2 through the through-hole in the inner case 22, thereby fulfilling the role of an excellent airflow guide.

[0022] Of course, the above is only a preferred embodiment of the present invention, and does not limit the scope of use of the present invention; therefore, any equivalent modifications made within the principle of the present invention should be included within the protection scope of the present invention.

Claims

1. a hair dryer body including a handle and a blower cylinder including an outer case and an inner case, wherein an annular hollow portion is formed between the outer case and the inner case, an air outlet is formed between the front ends of the outer case and the inner case, a rear-end cover is provided between the rear ends of the outer case and the inner case, an opening is provided in the center of the lower end of the outer case and is connected to the handle, a high-speed air blower is provided inside the handle, and the inside of the handle is connected to the annular hollow portion through the opening in the center of the lower end of the outer case, a seal spacer is provided between the outer case and the inner case, and the seal spacer divides the annular hollow portion formed between the outer case and the inner case into a front cavity and a rear cavity, the front cavity is connected to the inside of the handle to form a main air passage, and the rear-end cover is provided with an intake hole, and a through-hole is provided in the inner case at the position of the rear cavity to connect the rear cavity to the hollow in the center of the blower cylinder to form a secondary air passage.

2. 2. The air passage structure of a high-speed hair dryer according to claim 1, wherein a main control circuit board is provided in the rear cavity, the sealing spacer is provided with a routing hole, a switch control circuit board and a power line are provided inside the handle, and the power line, the switch control circuit board and the high-speed blower inside the handle are electrically connected to the main control circuit board in the rear cavity through the routing hole on the sealing spacer.

3. 3. The air passage structure of a high speed hair dryer as claimed in claim 2, wherein an electric heating device is provided in the front cavity, and the electric heating device is electrically connected to the main control circuit board in the rear cavity through a routing hole on the sealing spacer.

4. 2. The air passage structure of claim 1, wherein the rear end cover includes an annular end cover portion and a protective baffle portion, the annular end cover portion is connected between the outer case and the inner case, the protective baffle portion is connected to the rear end of the inner case and extends rearward to shield the rear of the annular end cover portion, and a suction gap is left between the protective baffle portion and the annular end cover portion.

5. 5. The air passage structure of a high-speed hair dryer as claimed in claim 4, wherein the annular end cover is provided with a first protective net, and the holes on the first protective net are used as suction holes for the rear end cover.

6. 2. The air passage structure of a high-speed hair dryer as claimed in claim 1, wherein the inner case has a through hole at the rear cavity, and a second protective net is provided in the through hole.

7. 3. The air passage structure of a high-speed hair dryer according to claim 2, wherein the sealing partition plate includes a mounting frame and an air guide, the mounting frame being an annular part connected to the inside of the outer case, and the air guide being a funnel-shaped part connected between the mounting frame and the inner case.

8. 8. The air passage structure of a high-speed hair dryer as claimed in claim 7, wherein the main control circuit board is fixedly mounted on the rear side of the mounting frame.

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