Air duct shell and electric hair drier

Abstract

The utility model relates to an air duct shell and an electric hair drier, and belongs to the technical field of electric hair driers. The inner shell assembly is arranged on the air duct shell and located in the mounting cavity, the inner shell assembly is provided with a second air inlet, and the inner shell assembly is provided with a first air outlet; the air duct inner shell is arranged in the inner shell assembly in a penetrating manner; the rear cover is arranged on the air duct outer shell, an air guide cavity is formed by the inner side of the rear cover and the inner side of the air duct inner shell, a second air outlet is formed between the rear cover and the air duct inner shell, and an air supply cavity is defined by the rear cover, the outer side of the air duct inner shell, the outer side of the inner shell assembly and the air duct outer shell. The first air inlet, the second air inlet, the air supply cavity, the second air outlet, the air guide cavity and the first air outlet are sequentially communicated, so that heat in the air duct shell can be taken away by cold air, the heat transferred to the air duct shell is effectively reduced, and a user is prevented from being scalded by mistaken touch.

Description

Technical Field

[0001] The utility model relates to the technical field of hair dryers, in particular to an air duct housing and a hair dryer. Background Art

[0002] A hair dryer generally includes a fan assembly and a heating wire. The negative pressure airflow formed by the fan assembly passes through the heating wire to form hot air output. In order to match the fast-paced life of people at this stage, the power of the heating wire is getting higher and higher. However, the existing hair dryer is prone to heat up the outer shell of the hair dryer when blowing hot air for a long time, and users are easily burned if they accidentally touch the outer shell of the hair dryer. Utility Model Content

[0003] Based on this, it is necessary to provide an air duct housing and a hair dryer to address the problem that the outer shell of the hair dryer is easily heated when the hair dryer blows out hot air for a long time.

[0004] A duct housing comprises: a duct housing, the duct housing being provided with a mounting cavity, the duct housing being provided with a first air inlet communicating with the mounting cavity; an inner housing component, the inner housing component being arranged on the duct housing and located in the mounting cavity, the inner housing component being provided with a second air inlet, the second air inlet communicating with the first air inlet, the inner housing component being provided with a first air outlet, one end of the inner housing component extending to the outside of the duct housing after passing through the first air outlet; an duct inner housing, the duct inner housing being passed through the inner housing component; and a rear cover The back cover is arranged on the air duct outer shell and is located at an end of the air duct outer shell away from the first air outlet, a part of the back cover extends to the interior of the air duct inner shell, the inner side of the back cover and the inner side of the air duct inner shell form an air guide cavity, a second air outlet is formed between the back cover and the air duct inner shell, the back cover, the outer side of the air duct inner shell, the outer side of the inner shell assembly and the air duct outer shell are surrounded to form an air supply cavity, the first air inlet, the second air inlet, the air supply cavity, the second air outlet, the air guide cavity and the first air outlet are connected in sequence.

[0005] The present application discloses a duct housing, which is formed by enclosing a rear cover, the outer side of the duct inner shell, the outer side of the inner shell assembly and the duct outer shell to form an air supply chamber, and the electric heating wire of the hair dryer is located in the space between the inner shell assembly 2 and the duct inner shell 3. The cold air entering from the first air inlet 102 can take away the heat generated by the electric heating wire, which can effectively reduce the heat transferred to the duct outer shell and avoid the temperature of the duct outer shell being too high. The first air inlet, the second air inlet, the air supply chamber, the second air outlet, the air guide chamber and the first air outlet are connected in sequence so that the cold air passing through the first air inlet can be transported to the outside world, and the heat located inside the duct housing can be transported to the outside world with the cold air, which effectively reduces the heat transferred to the duct outer shell and avoids the duct outer shell from heating up when the hair dryer outputs hot air for a long time, which causes the user to accidentally touch and burn. The second air inlet is arranged relative to the first air inlet, so that the efficiency of the airflow passing through the first air inlet and the second air inlet in sequence is high.

[0006] In one embodiment, the air supply cavity includes a first cavity and a second cavity, and the end of the inner shell component away from the first air outlet, the outer side of the air duct inner shell, the back cover and the inner side of the air duct outer shell enclose to form a first cavity, the first cavity is respectively connected with the second air inlet and the second air outlet, the inner shell component and the air duct outer shell enclose to form the second cavity, and the second cavity is connected with the first cavity. The arrangement of the first cavity and the second cavity can effectively reduce the heat transfer to the air duct outer shell, and avoid the user from accidentally touching and scalding. The first cavity is respectively connected with the second air inlet and the second air outlet, and the cold air can be output from the second air outlet after passing through the second air inlet and the first cavity in sequence, so that the heat of the first cavity is output with the cold air. The second cavity is enclosed by the inner shell component and the air duct outer shell to form a second cavity, and the second cavity is connected with the first cavity. The cold air in the first cavity can enter the second cavity, which can effectively reduce the temperature in the second cavity and reduce the heat exchange between the air inlet inner shell and the air duct outer shell.

[0007] In one embodiment, the inner shell assembly includes an air inlet inner shell and an air outlet inner shell, the air inlet inner shell is arranged on the air duct outer shell and is located in the installation cavity, the air inlet inner shell is provided with the second air inlet connected to the first air inlet, the air outlet inner shell is connected to the air inlet inner shell, one end of the air outlet inner shell passes through the first air outlet and extends to the outside of the air duct outer shell, the air outlet inner shell is provided with the first air outlet, the rear cover, the outer side of the air duct inner shell, the outer side of the air inlet inner shell and the air duct outer shell are enclosed to form an air supply cavity. The air outlet inner shell is connected to the air inlet inner shell, so as to strengthen the fixing of the air inlet inner shell and the air outlet inner shell, and avoid the impact of airflow causing the air inlet inner shell and the air outlet inner shell to separate. The air supply cavity is formed by the rear cover, the outer side of the air duct inner shell, the outer side of the air inlet inner shell, the outer side of the air outlet inner shell and the air duct outer shell, which can effectively reduce the heat transferred to the air duct outer shell.

[0008] In one embodiment, the air outlet inner housing includes an air outlet housing body and a decorative housing, the air outlet housing body is arranged on the air duct housing, the decorative housing is sandwiched between the air outlet housing body and the air duct housing, and the decorative housing or the air outlet housing body is provided with the first air outlet. The decorative housing is sandwiched between the air outlet housing body and the air duct housing, and the decorative housing is used to seal the gap between the air outlet housing body and the air duct housing to prevent dust and other debris from entering the installation cavity and affecting the service life of the product.

[0009] In one embodiment, the air outlet inner shell further includes a supporting rib, and the number of the supporting ribs is multiple, and the multiple supporting ribs are arranged on the air outlet shell body, and the multiple supporting ribs are arranged in sequence along the circumference of the air outlet shell body, and the decorative shell is sandwiched between the supporting ribs and the air duct outer shell. The multiple supporting ribs are abutted against the air duct outer shell, so that the stability of the air outlet inner shell is better. The multiple supporting ribs are arranged in sequence along the circumference of the air outlet shell body, so that the decorative shell can be stably sandwiched between the multiple supporting ribs and the air duct outer shell.

[0010] In one embodiment, the air outlet inner shell further comprises a supporting shell, the supporting shell is arranged on the air outlet shell body and is located at one end of the air outlet shell body away from the first air outlet, and the supporting shell is connected to the air inlet inner shell. The supporting shell is connected to the air inlet inner shell, thereby strengthening the fixing of the air inlet inner shell and the air outlet inner shell, and preventing the air inlet inner shell and the air outlet inner shell from being separated due to the impact of airflow. Moreover, the supporting shell can abut against the cavity wall of the installation cavity, so as to prevent the air outlet inner shell from shaking during use and affecting the air outlet.

[0011] In one embodiment, a third clamping block is provided at one end of the air inlet inner shell close to the air outlet inner shell, and the third clamping block is clamped with the air outlet inner shell. The air inlet inner shell and the air outlet inner shell are connected together by clamping the third clamping block with the air outlet inner shell. The connection method is simple and reliable, which reduces the difficulty of assembly and facilitates assembly.

[0012] In one of the embodiments, the air inlet inner shell includes an air inlet shell body, a first clamping block and a first clamping piece, the air inlet shell body is arranged on the air duct outer shell and is located in the installation cavity, the air inlet shell body is provided with the second air inlet, the first clamping block is arranged on the air inlet shell body, the first clamping block is clamped with the air outlet inner shell, the first clamping piece is arranged on the air inlet shell body, and the first clamping piece is clamped with the air duct outer shell. By clamping the first clamping block arranged on the air inlet shell body with the air outlet inner shell, the air inlet inner shell and the air outlet inner shell are connected together, which not only has a simple connection method but also has a high connection strength. The first clamping piece arranged on the air inlet shell body is clamped with the air duct outer shell so that the air inlet inner shell is limited on the air duct outer shell, which can realize the rapid positioning and installation of the air inlet inner shell.

[0013] In one embodiment, a stop block is formed at one end of the air duct inner shell near the rear cover, the stop block is provided with a stop space, a portion of the rear cover extends into the stop space, and a portion of the rear cover extending into the stop space is enclosed with the stop block to form a wind gap, and the wind gap is respectively connected to the air supply cavity and the second air outlet. The portion of the rear cover extends into the stop space, and the structure is more compact. The wind gap is respectively connected to the air supply cavity and the second air outlet, so that the heat in the air supply cavity can be taken away by the cold air, effectively reducing the heat transferred to the air duct outer shell.

[0014] In one embodiment, the air duct housing comprises a housing body and a second clamping block, the housing body is provided with the installation cavity and the first air inlet, the second clamping block is arranged on the housing body and located in the installation cavity, and the second clamping block is clamped with the back cover. The second clamping block is arranged on the housing body and located in the installation cavity, and the second clamping block is used to clamp with the back cover, so that the back cover and the air duct housing are stably connected.

[0015] In one embodiment, the cavity wall of the installation cavity forms a second clamping piece, the air inlet inner shell forms a first clamping piece, and the second clamping piece is clamped with the first clamping piece. By forming the second clamping piece on the cavity wall of the installation cavity, forming the first clamping piece on the air inlet inner shell, and clamping the second clamping piece with the first clamping piece, the air inlet inner shell is limited on the air duct outer shell, so that the air inlet inner shell can be quickly positioned and installed.

[0016] In one embodiment, the back cover includes a cover body, a first extension block and a second extension block, the cover body is arranged on the air duct shell, the first extension block is arranged on the cover body and the first extension block is located in the installation cavity, the first extension block is provided with a clamping hole, a second clamping block is formed on the inner side of the air duct shell, the second clamping block is adapted to the clamping hole, the air duct inner shell is provided with a limiting space, the second extension block is arranged on the cover body, a part of the second extension block extends into the limiting space, and the second air outlet is formed between the second extension block and the air duct inner shell. The back cover and the air duct shell are connected together by the first extension block being provided with a second clamping block arranged on the inner side of the air duct shell, thereby strengthening the connection strength between the back cover and the air duct shell, so that it has higher stability when in use. The arrangement of the first extension block and the second extension block enables the back cover to be quickly positioned and installed.

[0017] In one embodiment, the air duct inner shell includes an inner shell body and a limit block. The inner shell body extends to the interior of the air outlet inner shell after passing through the air inlet inner shell. There are multiple limit blocks. Multiple limit blocks are arranged on the inner shell body at intervals and are located at one end of the inner shell body away from the air outlet inner shell. Multiple limit blocks enclose a limit space. Part of the rear cover extends into the limit space. The second air outlet is formed between the air duct inner shell and the rear cover. The limit space is enclosed by multiple limit blocks. Part of the rear cover extends into the limit space. The rear cover abuts against the inner wall of the limit block. The cold air in the air supply cavity is transported to the air guide cavity from the space between two adjacent limit blocks. This design makes the installed rear cover more stable. In addition, the rear cover can be quickly positioned during assembly, which reduces the assembly difficulty of the staff and improves the assembly efficiency.

[0018] A hair dryer comprises: an air duct shell; a handle assembly, wherein the air duct shell is arranged on the handle assembly, and the handle assembly is provided with an air inlet hole and an air inlet channel, wherein the air inlet hole, the air inlet channel and the first air inlet of the air duct shell are connected in sequence; and a fan assembly, wherein the fan assembly is arranged on the handle assembly and located in the air inlet channel, and the negative pressure airflow formed by the fan assembly is transported toward the first air inlet.

[0019] The second aspect of the present application discloses a hair dryer, which is arranged on a handle assembly and located in an air inlet channel through a fan assembly. The fan assembly is used to form negative pressure wind in the air inlet channel. The wind with negative pressure is transported toward a first air inlet so that the hair dryer can discharge air according to user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional diagram of the air duct housing;

[0021] Figure 2 is a cross-sectional view of the air duct housing;

[0022] Figure 3 This is an exploded view of the air duct shell;

[0023] Figure 4 is an exploded view of the inner shell assembly;

[0024] Figure 5 is a first stereoscopic view of an air outlet inner housing according to an embodiment;

[0025] Figure 6 is a second stereoscopic view of an air outlet inner housing according to an embodiment;

[0026] Figure 7 is a first stereoscopic view of an air inlet inner housing of an embodiment;

[0027] Figure 8is a second stereoscopic view of an air inlet inner housing of an embodiment;

[0028] Fig. 9 A first stereoscopic view of an air duct inner shell of an embodiment;

[0029] Fig.10 A second stereoscopic view of an air duct inner shell of an embodiment;

[0030] Fig.11 is a three-dimensional diagram of the air duct housing;

[0031] Fig.12 is a three-dimensional image of the back cover;

[0032] Fig.13 A three-dimensional diagram of a hair dryer;

[0033] Fig.14 A cross-sectional view of a hair dryer.

[0034] The corresponding relationship between the reference numerals and the component names is as follows:

[0035] 1 air duct housing, 11 housing body, 12 second clamping piece, 13 second clamping block, 101 installation cavity, 102 first air inlet, 103 air supply cavity, 1031 first cavity, 1032 second cavity;

[0036] 2 inner shell assembly, 21 air inlet inner shell, 211 air inlet shell body, 212 first clamping block, 213 first clamping piece, 214 third clamping block, 22 air outlet inner shell, 221 air outlet shell body, 222 supporting shell, 223 supporting rib, 224 decorative shell, 201 second air inlet, 202 first air outlet;

[0037] 3 air duct inner shell, 31 inner shell body, 32 limit block, 301 limit space;

[0038] 4 rear cover, 41 cover body, 42 first extension block, 43 second extension block, 401 second air outlet, 402 air guide cavity, 403 clamping hole;

[0039] 100 air duct housing;

[0040] 200 handle assembly, 2001 air inlet hole, 2002 air inlet channel;

[0041] 300 fan assembly. DETAILED DESCRIPTION

[0042] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0043] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0044] Example 1

[0045] like Figure 1-3 As shown, this embodiment discloses an air duct housing, comprising: an air duct housing 1, the air duct housing 1 is provided with an installation cavity 101, the air duct housing 1 is provided with a first air inlet 102 connected with the installation cavity 101; an inner housing component 2, the inner housing component 2 is arranged on the air duct housing 1 and is located in the installation cavity 101, the inner housing component 2 is provided with a second air inlet 201, the second air inlet 201 is connected with the first air inlet 102, the inner housing component 2 is provided with a first air outlet 202, one end of the inner housing component 2 passes through the first air outlet 202 and extends to the outside of the air duct housing 1; an air duct inner shell 3, the air duct inner shell 3 is penetrated by the inner housing component 2 ; A back cover 4, wherein the back cover 4 is arranged on the air duct outer shell 1 and is located at one end of the air duct outer shell 1 away from the first air outlet 202, a portion of the back cover 4 extends to the interior of the air duct inner shell 3, the inner side of the back cover 4 and the inner side of the air duct inner shell 3 form an air guide cavity 402, a second air outlet 401 is formed between the back cover 4 and the air duct inner shell 3, the back cover 4, the outer side of the air duct inner shell 3, the outer side of the inner shell assembly 2 and the air duct outer shell 1 together form an air supply cavity 103, the first air inlet 102, the second air inlet 201, the air supply cavity 103, the second air outlet 401, the air guide cavity 402 and the first air outlet 202 are sequentially connected.

[0046] The present application discloses an air duct housing, wherein an air supply cavity 103 is formed by enclosing a rear cover 4, the outer side of an air duct inner shell 3, the outer side of an inner shell assembly 2 and an air duct outer shell 1. The electric heating wire of the hair dryer is located in the space between the inner shell assembly 2 and the air duct inner shell 3. The cold air entering from the first air inlet 102 can take away the heat generated by the electric heating wire, which can effectively reduce the heat transferred to the air duct outer shell 1 and prevent the temperature of the air duct outer shell 1 from being too high. The first air inlet 102, the second air inlet 201, the air supply cavity 103, the second air outlet 401, the air guide cavity 402 and the first air outlet 202 are connected in sequence so that the cold air passing through the first air inlet 102 can be transported to the outside, and the heat inside the air duct housing can be transported to the outside along with the cold air, effectively reducing the heat transferred to the air duct outer shell 1, and preventing the air duct outer shell 1 from heating up when the hair dryer outputs hot air for a long time, thereby preventing the user from accidentally touching and scalding. The second air inlet 201 is arranged opposite to the first air inlet 102 , so that the airflow passes through the first air inlet 102 and the second air inlet 201 in sequence with high efficiency.

[0047] like Figure 2 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the air supply cavity 103 includes a first cavity 1031 and a second cavity 1032, the end of the inner housing component 2 away from the first air outlet 202, the outer side of the air duct inner shell 3, the back cover 4 and the inner side of the air duct outer shell 1 enclose the first cavity 1031, the first cavity 1031 is communicated with the second air inlet 201 and the second air outlet 401 respectively, the inner housing component 2 and the air duct outer shell 1 enclose the second cavity 1032, and the second cavity 1032 is communicated with the first cavity 1031. The arrangement of the first cavity 1031 and the second cavity 1032 can effectively reduce the heat transfer to the air duct outer shell 1, avoiding burns caused by accidental touch by the user. The first cavity 1031 is respectively connected with the second air inlet 201 and the second air outlet 401, and the cold air can be output from the second air outlet 401 after passing through the second air inlet 201 and the first cavity 1031 in sequence, so that the heat of the first cavity 1031 is output along with the cold air. The second cavity 1032 is formed by the inner shell assembly 2 and the air duct outer shell 1, and the second cavity 1032 is connected with the first cavity 1031, and the cold air in the first cavity 1031 can enter the second cavity 1032, which can effectively reduce the temperature in the second cavity 1032 and reduce the heat exchange between the air inlet inner shell 2 and the air duct outer shell 1.

[0048] like Figure 2 and Figure 4As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the inner shell assembly 2 includes an air inlet inner shell 21 and an air outlet inner shell 22, the air inlet inner shell 21 is arranged on the air duct outer shell 1 and is located in the installation cavity 101, the air inlet inner shell 21 is provided with the second air inlet 201 communicating with the first air inlet 102, the air outlet inner shell 22 is connected to the air inlet inner shell 21, one end of the air outlet inner shell 22 passes through the first air outlet 202 and extends to the outside of the air duct outer shell 1, the air outlet inner shell 22 is provided with the first air outlet 202, the rear cover 4, the outer side of the air duct inner shell 3, the outer side of the air inlet inner shell 21 and the air duct outer shell 1 enclose to form an air supply cavity 103. The air outlet inner shell 22 is connected to the air inlet inner shell 21, thereby strengthening the fixing of the air inlet inner shell 21 and the air outlet inner shell 22, and preventing the air inlet inner shell 21 and the air outlet inner shell 22 from being separated due to the impact of airflow. The air supply cavity 103 is formed by the rear cover 4 , the outer side of the air duct inner shell 3 , the outer side of the air inlet inner shell 21 , the outer side of the air outlet inner shell 22 and the air duct outer shell 1 , which can effectively reduce the heat transferred to the air duct outer shell 1 .

[0049] like Figure 5 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the air outlet inner shell 22 includes an air outlet shell body 221 and a decorative shell 224, the air outlet shell body 221 is arranged on the air duct outer shell 1, the decorative shell 224 is sandwiched between the air outlet shell body 221 and the air duct outer shell 1, and the decorative shell 224 or the air outlet shell body 221 is provided with the first air outlet 202. The decorative shell 224 is sandwiched between the air outlet shell body 221 and the air duct outer shell 1, and the decorative shell 224 is used to seal the gap between the air outlet shell body 221 and the air duct outer shell 1 to prevent dust and other debris from entering the installation cavity 101 and affecting the service life of the product.

[0050] like Figure 5 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the air outlet inner shell 22 also includes a supporting rib 223, the number of the supporting rib 223 is multiple, the multiple supporting ribs 223 are arranged on the air outlet shell body 221, the multiple supporting ribs 223 are sequentially spaced along the circumference of the air outlet shell body 221, and the decorative shell 224 is sandwiched between the supporting rib 223 and the air duct outer shell 1. The multiple supporting ribs 223 are against the air duct outer shell 1, so that the stability of the air outlet inner shell 22 is better. The multiple supporting ribs 223 are sequentially spaced along the circumference of the air outlet shell body 221, so that the decorative shell 224 can be stably sandwiched between the multiple supporting ribs 223 and the air duct outer shell 1.

[0051] like Figure 6As shown, in addition to the features of the above embodiment, this embodiment further defines that: the air outlet inner shell 22 also includes a support shell 222, the support shell 222 is arranged on the air outlet shell body 221 and is located at one end of the air outlet shell body 221 away from the first air outlet 202, and the support shell 222 is connected to the air inlet inner shell 21. The support shell 222 is connected to the air inlet inner shell 21, thereby strengthening the fixing of the air inlet inner shell 21 and the air outlet inner shell 22, and preventing the air inlet inner shell 21 and the air outlet inner shell 22 from being separated due to the impact of airflow. Moreover, the support shell 222 can be against the cavity wall of the installation cavity 101, so as to prevent the air outlet inner shell 22 from shaking during use and affecting the air outlet.

[0052] like Figure 7 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the air inlet inner shell 21 is provided with a third clamping block 214 at one end close to the air outlet inner shell 22, and the third clamping block 214 is clamped with the air outlet inner shell 22. The air inlet inner shell 21 and the air outlet inner shell 22 are connected together by clamping the third clamping block 214 with the air outlet inner shell 22, and the connection method is simple and reliable, which reduces the difficulty of assembly and facilitates assembly.

[0053] like Figure 8 As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: the air inlet inner shell 21 includes an air inlet shell body 211, a first clamping block 212 and a first clamping member 213; the air inlet shell body 211 is arranged on the air duct outer shell 1 and is located in the mounting cavity 101; the air inlet shell body 211 is provided with the second air inlet 201; the first clamping block 212 is arranged on the air inlet shell body 211; the first clamping block 212 is clamped with the air outlet inner shell 22; the first clamping member 213 is arranged on the air inlet shell body 211; the first clamping member 213 is clamped with the air duct outer shell 1. By clamping the first clamping block 212 arranged on the air inlet shell body 211 with the air outlet inner shell 22, the air inlet inner shell 2 and the air outlet inner shell 22 are connected together, which not only has a simple connection method but also has a high connection strength. The first clamping member 213 disposed on the air inlet housing body 211 is clamped with the air duct outer shell 1 so that the air inlet inner shell 2 is limited on the air duct outer shell 1, thereby realizing rapid positioning and installation of the air inlet inner shell 2.

[0054] like Fig. 9As shown, in addition to the features of the above-mentioned embodiment, this embodiment further defines that: a limit block 32 is formed at one end of the air duct inner shell 3 close to the rear cover 4, the limit block 32 is provided with a limit space 301, a portion of the rear cover 4 extends into the limit space 301, and the portion of the rear cover 4 extending into the limit space 301 is enclosed with the limit block 32 to form a wind gap, and the wind gap is respectively connected with the air supply cavity 103 and the second air outlet 401. The portion of the rear cover 4 extends into the limit space 301, and the structure is more compact. The wind gap is respectively connected with the air supply cavity 103 and the second air outlet 401, so that the heat in the air supply cavity 103 can be taken away by the cold air, effectively reducing the heat transferred to the air duct outer shell 1.

[0055] like Fig.11 and Fig.12 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the air duct housing 1 includes a housing body 11 and a second clamping block 13, the housing body 11 is provided with the installation cavity 101 and the first air inlet 102, the second clamping block 13 is arranged on the housing body 11 and is located in the installation cavity 101, and the second clamping block 13 is clamped with the back cover 4. The second clamping block 13 is arranged on the housing body 11 and is located in the installation cavity 101, and the second clamping block 13 is used to clamp with the back cover 4, so that the back cover 4 is stably connected to the air duct housing 1.

[0056] like Figure 2 and Fig.11 As shown, in addition to the features of the above embodiment, this embodiment further defines that: the cavity wall of the installation cavity 101 forms a second clamping member 12, the air inlet inner shell 21 forms a first clamping member 213, and the second clamping member 12 is clamped with the first clamping member 213. The second clamping member 12 is formed on the cavity wall of the installation cavity 101, the first clamping member 213 is formed on the air inlet inner shell 21, and the second clamping member 12 is clamped with the first clamping member 213 to limit the air inlet inner shell 2 on the air duct outer shell 1, so that the air inlet inner shell 2 can be quickly positioned and installed.

[0057] like Figure 2 and Fig.12As shown, in addition to the features of the above embodiment, this embodiment further defines that: the rear cover 4 includes a cover body 41, a first extension block 42 and a second extension block 43, the cover body 41 is arranged on the air duct housing 1, the first extension block 42 is arranged on the cover body 41 and the first extension block 42 is located in the installation cavity 101, the first extension block 42 is provided with a clamping hole 403, the inner side of the air duct housing 1 is formed with a second clamping block 13, the second clamping block 13 is adapted to the clamping hole 403, the air duct inner shell 3 is provided with a limiting space 301, the second extension block 43 is arranged on the cover body 41, a part of the second extension block 43 extends into the limiting space 301, and the second air outlet 401 is formed between the second extension block 43 and the air duct inner shell 3. The rear cover 4 and the air duct housing 1 are connected together by the first extension block 42 being provided with the second clamping block 13 arranged on the inner side of the air duct housing 1, so that the connection strength between the rear cover 4 and the air duct housing 1 is strengthened, so that it has higher stability when in use. The first extension block 42 and the second extension block 43 are provided so that the rear cover 4 can be quickly positioned and installed.

[0058] Example 2

[0059] like Fig.10 As shown, the air duct inner shell 3 includes an inner shell body 31 and a stopper 32. The inner shell body 31 passes through the air inlet inner shell 21 and extends to the inside of the air outlet inner shell 22. There are multiple stopper blocks 32. Multiple stopper blocks 32 are arranged on the inner shell body 31 at intervals and are located at one end of the inner shell body 31 away from the air outlet inner shell 22. Multiple stopper blocks 32 enclose a stopper space 301. Part of the rear cover 4 extends into the stopper space 301. The second air outlet 401 is formed between the air duct inner shell 3 and the rear cover 4. The stopper space 301 is enclosed by multiple stopper blocks 32. Part of the rear cover 4 extends into the stopper space 301. The rear cover 4 abuts against the inner wall of the stopper blocks 32. The cold air in the air supply cavity 103 is transported from the space between two adjacent stopper blocks 32 to the air guide cavity 402. This design makes the installed rear cover 4 more stable. Moreover, the rear cover 4 can be quickly positioned during assembly, which reduces the assembly difficulty for the staff and improves the assembly efficiency.

[0060] Example 3

[0061] like Fig.11 and Fig.12As shown, a hair dryer includes: an air duct housing 100; a handle assembly 200, wherein the air duct housing 100 is arranged on the handle assembly 200, and the handle assembly 200 is provided with an air inlet hole 2001 and an air inlet channel 2002, and the air inlet hole 2001, the air inlet channel 2002 and the first air inlet port 102 of the air duct housing 100 are connected in sequence; a fan assembly 300, wherein the fan assembly 300 is arranged on the handle assembly 200 and is located in the air inlet channel 2002, and the negative pressure airflow formed by the fan assembly 300 is transported toward the first air inlet port 102.

[0062] The second aspect of the present application discloses a hair dryer, which is arranged on the handle assembly 200 and located in the air inlet channel 2002 through a fan assembly 300. The fan assembly 300 is used to form negative pressure wind in the air inlet channel 2002. The wind with negative pressure is transported toward the first air inlet 102 so that the hair dryer can discharge air according to the needs of the user.

[0063] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An air duct housing for a hair dryer, characterized in that: include: An air duct housing (1), the air duct housing (1) being provided with a mounting cavity (101), and the air duct housing (1) being provided with a first air inlet (102) communicating with the mounting cavity (101); An inner shell component (2), the inner shell component (2) being arranged on the air duct outer shell (1) and located in the installation cavity (101), the inner shell component (2) being provided with a second air inlet (201), the second air inlet (201) being communicated with the first air inlet (102), the inner shell component (2) being provided with a first air outlet (202), one end of the inner shell component (2) passing through the first air outlet (202) and then extending to the outside of the air duct outer shell (1); An air duct inner shell (3), the air duct inner shell (3) being arranged through the inner shell assembly (2); A rear cover (4), wherein the rear cover (4) is arranged on the air duct outer shell (1) and is located at an end of the air duct outer shell (1) away from the first air outlet (202), a portion of the rear cover (4) extends into the interior of the air duct inner shell (3), an inner side of the rear cover (4) and an inner side of the air duct inner shell (3) form an air guide cavity (402), a second air outlet (401) is formed between the rear cover (4) and the air duct inner shell (3), the rear cover (4), the outer side of the air duct inner shell (3), the outer side of the inner shell assembly (2) and the air duct outer shell (1) together form an air supply cavity (103), and the first air inlet (102), the second air inlet (201), the air supply cavity (103), the second air outlet (401), the air guide cavity (402) and the first air outlet (202) are sequentially connected.

2. The air duct housing according to claim 1, characterized in that: The inner shell assembly (2) comprises an air inlet inner shell (21) and an air outlet inner shell (22); the air inlet inner shell (21) is arranged on the air duct outer shell (1) and is located in the installation cavity (101); the air inlet inner shell (21) is provided with the second air inlet (201) connected to the first air inlet (102); the air outlet inner shell (22) is connected to the air inlet inner shell (21); one end of the air outlet inner shell (22) passes through the first air outlet (202) and then extends to the outside of the air duct outer shell (1); the air outlet inner shell (22) is provided with the first air outlet (202); the rear cover (4), the outer side of the air duct inner shell (3), the outer side of the air inlet inner shell (21) and the air duct outer shell (1) enclose an air supply cavity (103).

3. The air duct housing according to claim 2, characterized in that: The air outlet inner shell (22) comprises an air outlet shell body (221) and a decorative shell (224); the air outlet shell body (221) is arranged on the air duct outer shell (1); the decorative shell (224) is sandwiched between the air outlet shell body (221) and the air duct outer shell (1); the decorative shell (224) or the air outlet shell body (221) is provided with the first air outlet (202).

4. The air duct housing according to claim 3, characterized in that: The air outlet inner shell (22) further comprises a supporting rib (223), the number of the supporting rib (223) being plural, the supporting ribs (223) being arranged on the air outlet shell body (221), the supporting ribs (223) being arranged in sequence and spaced apart along the circumference of the air outlet shell body (221), and the decorative shell (224) being sandwiched between the supporting rib (223) and the air duct outer shell (1); And / or the air outlet inner shell (22) further includes a supporting shell (222), wherein the supporting shell (222) is arranged on the air outlet shell body (221) and is located at an end of the air outlet shell body (221) away from the first air outlet (202), and the supporting shell (222) is connected to the air inlet inner shell (21).

5. The air duct housing according to claim 2, characterized in that: The air inlet inner shell (21) comprises an air inlet shell body (211), a first clamping block (212) and a first clamping piece (213); the air inlet shell body (211) is arranged on the air duct outer shell (1) and is located in the mounting cavity (101); the air inlet shell body (211) is provided with the second air inlet (201); the first clamping block (212) is arranged on the air inlet shell body (211); the first clamping block (212) is clamped with the air outlet inner shell (22); the first clamping piece (213) is arranged on the air inlet shell body (211); the first clamping piece (213) is clamped with the air duct outer shell (1).

6. The air duct housing according to claim 2, characterized in that: A limit block (32) is formed at one end of the air duct inner shell (3) close to the rear cover (4), the limit block (32) is provided with a limit space (301), a portion of the rear cover (4) extends into the limit space (301), and the portion of the rear cover (4) extending into the limit space (301) is enclosed with the limit block (32) to form an air gap, and the air gap is respectively connected to the air supply cavity (103) and the second air outlet (401); Or the air duct inner shell (3) comprises an inner shell body (31) and a limit block (32); the inner shell body (31) passes through the air inlet inner shell (21) and then extends to the interior of the air outlet inner shell (22); there are a plurality of limit blocks (32); the plurality of limit blocks (32) are arranged at intervals on the inner shell body (31) and are located at one end of the inner shell body (31) away from the air outlet inner shell (22); the plurality of limit blocks (32) enclose a limit space (301); a portion of the rear cover (4) extends into the limit space (301); and the second air outlet (401) is formed between the air duct inner shell (3) and the rear cover (4).

7. The air duct housing according to claim 1, characterized in that: The air duct housing (1) comprises a housing body (11) and a second clamping block (13); the housing body (11) is provided with the installation cavity (101) and the first air inlet (102); the second clamping block (13) is arranged on the housing body (11) and is located in the installation cavity (101); the second clamping block (13) is clamped with the rear cover (4); and / or a cavity wall of the installation cavity (101) forms a second clamping piece (12); the inner shell assembly (2) comprises an air inlet inner shell (21); the air inlet inner shell (21) is arranged on the air duct outer shell (1) and is located in the installation cavity (101); a first clamping piece (213) is formed on the air inlet inner shell (21); and the second clamping piece (12) is clamped with the first clamping piece (213).

8. The air duct housing according to claim 1, characterized in that: The rear cover (4) comprises a cover body (41), a first extension block (42) and a second extension block (43); the cover body (41) is arranged on the air duct outer shell (1); the first extension block (42) is arranged on the cover body (41) and the first extension block (42) is located in the installation cavity (101); the first extension block (42) is provided with a clamping hole (403); a second clamping block (13) is formed on the inner side of the air duct outer shell (1); the second clamping block (13) is matched with the clamping hole (403); the air duct inner shell (3) is provided with a limiting space (301); the second extension block (43) is arranged on the cover body (41); a part of the second extension block (43) extends into the limiting space (301); and the second air outlet (401) is formed between the second extension block (43) and the air duct inner shell (3).

9. The air duct housing according to claim 1, characterized in that: The air supply cavity (103) comprises a first cavity (1031) and a second cavity (1032); an end of the inner shell component (2) away from the first air outlet (202), the outer side of the air duct inner shell (3), the rear cover (4) and the inner side of the air duct outer shell (1) together form the first cavity (1031); the first cavity (1031) is respectively connected to the second air inlet (201) and the second air outlet (401); the inner shell component (2) and the air duct outer shell (1) together form the second cavity (1032); the second cavity (1032) is connected to the first cavity (1031).

10. A hair dryer, characterized in that: include: The air duct housing (100) according to any one of claims 1 to 9; A handle assembly (200), wherein the air duct housing (100) is arranged on the handle assembly (200), and the handle assembly (200) is provided with an air inlet hole (2001) and an air inlet channel (2002), and the air inlet hole (2001), the air inlet channel (2002) and the first air inlet port (102) of the air duct housing (100) are sequentially connected; A fan assembly (300), wherein the fan assembly (300) is arranged on the handle assembly (200) and is located in the air inlet channel (2002), and the negative pressure airflow formed by the fan assembly (300) is transported toward the first air inlet (102).

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