Hair dryer

Abstract

The utility model provides an air blower which comprises a shell and a centrifugal fan arranged in the shell, the shell comprises a first half shell and a second half shell, the first half shell comprises a first outer wall and a first inner wall, the second half shell comprises a second outer wall and a second inner wall, and the first outer wall and the second outer wall are matched and located on the outer sides of the first inner wall and the second inner wall. The first inner wall and the second inner wall are matched to form a containing space for containing the centrifugal fan.

Description

Technical Field

[0001] The present application relates to the field of tools, and in particular to a hair dryer. Background Art

[0002] In the prior art, in recent years, a hair dryer is a common blowing device, which can be used for dehumidification and drying in open-air sports games, and for blowing off and sweeping fallen leaves in large squares, green spaces, parks, and golf courses.

[0003] A hair dryer consists of a motor, a centrifugal fan, and a housing with an air inlet and outlet. When the motor starts to rotate the fan, a negative pressure zone is created inside the housing. External air enters the blower (i.e., the volute) through the air inlet, creating an airflow. After passing through the air inlet, the fan draws the air in and then rapidly spins it outward. The fan typically rotates at a high speed (13,000 to 20,000 rpm), generating centrifugal force that forces the air out through the outlet at a constant speed or flow rate.

[0004] The volute is typically made of ABS or PA6-GF30 and is injection molded. It consists of a left and right half-shell, secured together by screws. A stopper is typically designed around the edge of the volute to limit the position and provide a certain degree of sealing. Injection-molded volutes often deform, and the left and right half-shells secured together by screws can also warp in some locations, resulting in a larger joint and air leakage. As the motor speed increases, the negative pressure within the volute cavity also increases. Conventional stoppers fail to provide a sealing effect, leading to air leakage and affecting the fan's air output and wind speed.

[0005] Therefore, it is necessary to provide a new hair dryer. Utility Model Content

[0006] The present application provides a hair dryer with better sealing and better performance.

[0007] Specifically, the present application provides a hair dryer, which includes a shell and a centrifugal fan arranged in the shell, the shell includes a first half shell and a second half shell, the first half shell includes a first outer wall and a first inner wall, the second half shell includes a second outer wall and a second inner wall, the first outer wall and the second outer wall cooperate and are located on the outside of the first inner wall and the second inner wall, the first inner wall and the second inner wall cooperate to form a receiving space for accommodating the centrifugal fan.

[0008] Furthermore, the centrifugal fan defines a radial direction and an axial direction, and the first inner wall and the second inner wall are arranged in the circumferential direction of the centrifugal fan.

[0009] Furthermore, the first inner wall and the second inner wall are not provided in the axial direction of the centrifugal fan.

[0010] Furthermore, the shell includes a volute section and an air outlet section, the air outlet section defines an air outlet, and the first inner wall and the second inner wall extend to the air outlet.

[0011] Furthermore, the first outer wall includes a first base and a first rib extending from the first base, and the second outer wall is provided with a first receiving groove, and the first rib is received in the first receiving groove.

[0012] Furthermore, the width of the first rib W1 is 0.8 mm to 1.2 mm, and the height of the first rib H1 is 1.0 mm to 1.4 mm; the width of the first receiving groove W2 is W1+0.2 mm, and the depth of the first receiving groove H2 is H1+0.2 mm.

[0013] Furthermore, the hair dryer also includes a first seal installed on the first inner wall and a second seal installed on the second inner wall, and the first seal cooperates with the second seal.

[0014] Furthermore, the first inner wall is provided with a first groove, the first sealing member includes a first main body and a first rib protruding from the first main body, the first main body is accommodated in the first groove, and the first rib is located outside the first groove; the second inner wall is provided with a second groove, the second sealing member is accommodated in the second groove, the second sealing member is provided with a second receiving groove, and the first rib is accommodated in the second receiving groove.

[0015] Furthermore, the width of the first convex rib is W3 = 0.5 mm to 1.0 mm, and the height of the first convex rib is H3 = 0.3 mm to 0.5 mm; the width of the second receiving groove is W4 = W3 + 0.2 mm, and the depth of the second receiving groove is H4 = H3 - (0 to 0.5) mm.

[0016] Furthermore, the first sealing member and the second sealing member are both made of soft rubber material.

[0017] In the present application, the first half shell includes a first outer wall and a first inner wall, and the second half shell includes a second outer wall and a second inner wall. The first outer wall and the second outer wall cooperate and are located on the outside of the first inner wall and the second inner wall. The first inner wall and the second inner wall cooperate to form a receiving space for accommodating the centrifugal fan, which can greatly improve the sealing of the hair dryer and thus improve the energy efficiency of the whole machine. In addition, it can play a role in blocking noise transmission and reducing the noise level of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1It is a structural schematic diagram of the hair dryer of this application.

[0019] Figure 2 yes Figure 1 A cross-sectional view of the hair dryer shown from one perspective.

[0020] Figure 3 yes Figure 2 Magnified view of the circled portion shown.

[0021] Figure 4 yes Figure 1 Exploded perspective view of the hair dryer shown.

[0022] Figure 5 yes Figure 1 A cross-sectional view of the hair dryer from another perspective is shown.

[0023] Figure 6 yes Figure 4 Schematic diagram of the structure of the first half shell shown.

[0024] Figure 7 yes Figure 4 Schematic diagram of the structure of the second half shell shown.

[0025] Figure 8 yes Figure 6 A schematic structural diagram of the first half shell from another perspective is shown.

[0026] Figure 9 yes Figure 8 A cross-sectional view of the first half shell along line BB is shown.

[0027] Figure 10 yes Figure 9 An enlarged view of the circled portion A is shown.

[0028] Figure 11 yes Figure 7 A schematic structural diagram of the second half shell from another perspective is shown.

[0029] Figure 12 yes Figure 11 The second half shell is shown in section along AA.

[0030] Figure 13 yes Figure 12 An enlarged view of the circled portion B is shown. DETAILED DESCRIPTION

[0031] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different drawings represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with this application.

[0032] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the same ordinary meaning as those of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar terms used in this application do not denote any order, quantity, or importance, but are simply used to distinguish different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather indicate the presence of at least one. "Multiple" or "several" means two or more. Unless otherwise indicated, terms such as "front," "rear," "lower," and / or "upper" are for convenience only and are not intended to limit a position or spatial orientation. Terms such as "include" or "comprising" mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "an," "said," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0033] Please combine Figures 1 to 13 The present application provides a hair dryer 100 , including a housing 10 , a centrifugal fan 20 and a driving assembly (not shown), wherein the driving assembly is configured to drive the centrifugal fan 20 to rotate, and the centrifugal fan 20 is disposed in the housing 10 .

[0034] The housing 10 includes a first half-shell 11 and a second half-shell 12. The first half-shell 11 includes a first outer wall 13 and a first inner wall 15, while the second half-shell 12 includes a second outer wall 14 and a second inner wall 16. The first outer wall 13 and the second outer wall 14 cooperate and are located outside the first inner wall 15 and the second inner wall 16. The first inner wall 15 and the second inner wall 16 cooperate to form a receiving space 104 for accommodating the centrifugal fan 20. The centrifugal fan 20 defines a radial direction X and an axial direction Y. The first inner wall 15 and the second inner wall 16 are arranged in the circumferential direction of the centrifugal fan 20. The first inner wall 15 and the second inner wall 16 are not provided in the axial direction Y of the centrifugal fan 20. The housing 10 includes a volute section 101 and an air outlet section 102. The air outlet section 102 defines an air outlet 103. The first inner wall 15 and the second inner wall 16 extend to the air outlet 103.

[0035] The first outer wall 13 includes a first base 130 and a first rib 131 extending from the first base 130. The second outer wall 14 defines a first receiving groove 141, within which the first rib 131 is received. The width W1 of the first rib 131 ranges from 0.8 mm to 1.2 mm, and the height H1 ranges from 1.0 mm to 1.4 mm. Preferably, the width W1 of the first rib 131 ranges from 1.2 mm to 1.4 mm. The width W2 of the first receiving groove 141 ranges from W1 + 0.2 mm, and the depth H2 ranges from H1 + 0.2 mm. Preferably, the width W2 of the first receiving groove 141 ranges from 1.4 mm to 1.6 mm.

[0036] The hair dryer 100 also includes a first seal 17 mounted on the first inner wall 15 and a second seal 18 mounted on the second inner wall 16. The first seal 17 and the second seal 18 cooperate. Specifically, the first inner wall 15 has a first groove 151. The first seal 17 includes a first main body 171 and a first rib 172 extending from the first main body 171. The first main body 171 is received in the first groove 151, and the first rib 172 is located outside the first groove 151. The second inner wall 16 has a second groove 161. The second seal 18 is received in the second groove 161. The second seal 18 has a second receiving groove 180, and the first rib 172 is received in the second receiving groove 180. The width W3 of the first rib 172 is 0.5 mm to 1.0 mm, and the height H3 of the first rib 172 is 0.3 mm to 0.5 mm. Preferably, the width W3 of the first rib 172 is 0.5 mm, and the height H3 of the first rib 172 is 0.3 mm. The width W4 of the second receiving groove 180 is W3 + 0.2 mm, and the depth H4 of the second receiving groove 180 is H3 - (0 to 0.5) mm. Preferably, the width W4 of the second receiving groove 180 is 0.7 mm, and the depth H4 of the second receiving groove 180 is 0.3 mm.

[0037] The first sealing member 17 and the second sealing member 18 are both made of soft rubber material with a hardness of HA = 40 to 60 degrees. Utilizing the flexibility of the soft rubber, an interference fit design is adopted in the depth direction to achieve a better sealing effect and withstand a larger internal negative pressure.

[0038] In the present application, the first half shell 11 includes a first outer wall 13 and a first inner wall 15, and the second half shell 12 includes a second outer wall 14 and a second inner wall 16. The first outer wall 13 and the second outer wall 14 cooperate and are located on the outside of the first inner wall 15 and the second inner wall 16. The first inner wall 15 and the second inner wall 16 cooperate to form a receiving space 104 for accommodating the centrifugal fan 20, which can greatly improve the sealing of the hair dryer 100 and thus improve the energy efficiency of the whole machine. In addition, it can play a role in blocking noise transmission and reducing the noise level of the whole machine.

[0039] The above description is merely a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any technician familiar with this profession can make slight changes or modifications to equivalent embodiments with equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A hair dryer comprising a housing and a centrifugal fan disposed in the housing, wherein the housing comprises a first half shell and a second half shell, wherein: The first half shell includes a first outer wall and a first inner wall, and the second half shell includes a second outer wall and a second inner wall. The first outer wall cooperates with the second outer wall and is located on the outside of the first inner wall and the second inner wall. The first inner wall cooperates with the second inner wall to form a receiving space for accommodating the centrifugal fan.

2. The hair dryer according to claim 1, characterized in that The centrifugal fan defines a radial direction and an axial direction, and the first inner wall and the second inner wall are arranged in a circumferential direction of the centrifugal fan.

3. The hair dryer according to claim 2, characterized in that The first inner wall and the second inner wall are not provided in the axial direction of the centrifugal fan.

4. The hair dryer according to claim 1, wherein The housing includes a volute section and an air outlet section, the air outlet section defines an air outlet, and the first inner wall and the second inner wall extend to the air outlet.

5. The hair dryer according to claim 1, wherein The first outer wall includes a first base and a first rib extending from the first base. The second outer wall is provided with a first receiving groove. The first rib is received in the first receiving groove.

6. The hair dryer according to claim 5, characterized in that The width of the first convex rib is W1 = 0.8 mm to 1.2 mm, and the height of the first convex rib is H1 = 1.0 mm to 1.4 mm; the width of the first receiving groove is W2 = W1 + 0.2 mm, and the depth of the first receiving groove is H2 = H1 + 0.2 mm.

7. The hair dryer according to claim 1, wherein The hair dryer further includes a first sealing member installed on the first inner wall and a second sealing member installed on the second inner wall, wherein the first sealing member cooperates with the second sealing member.

8. The hair dryer according to claim 7, characterized in that The first inner wall is provided with a first groove, the first sealing member includes a first main body and a first rib protruding from the first main body, the first main body is accommodated in the first groove, and the first rib is located outside the first groove; the second inner wall is provided with a second groove, the second sealing member is accommodated in the second groove, the second sealing member is provided with a second receiving groove, and the first rib is accommodated in the second receiving groove.

9. The hair dryer according to claim 8, characterized in that The width W3 of the first convex rib is 0.5 mm to 1.0 mm, and the height H3 of the first convex rib is 0.3 mm to 0.5 mm; the width W4 of the second receiving groove is W3+0.2 mm, and the depth H4 of the second receiving groove is H3-(0 to 0.5) mm.

10. The hair dryer according to claim 7, characterized in that The first sealing member and the second sealing member are both made of soft rubber material.

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