CN211354205U - Heating unit of electric hair drier and electric hair drier thereof - Google Patents

Abstract

The utility model relates to a domestic appliance field, in order to solve among the prior art heating unit assembly process complicated, use the technical problem that stifled wind turns red behind the hairdryer, provides a heating unit of hairdryer and hairdryer thereof, heating unit includes a plurality of mica sheets and the heater of coiling on the mica sheet, wherein, heating unit is still including the installing support that has the cavity passageway, a plurality of mica sheets are installed on the installing support, the installing support has the breach along its axial extension, the both sides of breach are located at least to a plurality of mica sheets. The assembly difficulty is reduced, the red probability of the heating wire is reduced, and the use is safer.

Description

Heating unit of electric hair drier and electric hair drier thereof

Technical Field

The utility model relates to the field of household appliances, especially, relate to a heating unit of hairdryer and hairdryer thereof.

Background

Among the prior art, hairdryer includes fan unit, heating unit, shell, handle components and shell are connected, fan unit locates in handle components or the shell, heating unit locates in the shell, heating unit from locating the air intake on handle components or locate the air intake on the shell and draw in the air current gets into the shell, heating unit is used for heating this air current, if the heat that heating unit produced scatters out in time and can lead to heating unit reddening, produces the incident.

The heating wire is wound on a mica sheet by a heating unit of the existing hair drier, a plurality of mica sheets are mutually spliced together to enable the section to be in a snowflake shape, and the heating unit of the type is placed in a shell to cause overlarge wind resistance and loss of wind volume. The "snowflake-like" mica sheets generally include three mica sheets that are in a fitting relationship with each other, and the fitting relationship and tolerance between the plurality of mica sheets are considered, which makes the assembly process complicated.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a heating unit and use its hairdryer.

The technical scheme of the utility model as follows:

the utility model provides a heating unit of hairdryer, includes a plurality of mica sheets and the heater of coiling on the mica sheet, wherein, heating unit is still including the installing support that has hollow channel, a plurality of mica sheets are installed on the installing support, the installing support has the breach of following its axial extension, the both sides of breach are located at least to a plurality of mica sheets.

When the heating unit is applied to electric hair dryer, the air flow of the electric hair dryer can pass through the hollow channel, so that the wind resistance is reduced; the mica sheets are installed on the side wall of the installation support, the mica sheets are supported along the side wall of the installation support, the matching relation between a single mica sheet and the installation support is considered in the installation process, and the assembly process is simple. The notch on the mounting bracket is used for forming a wind storage area by matching the heating unit with the internal air duct structure of the electric hair drier when the heating unit is mounted on the electric hair drier, so that the heating wire and the air flow can be subjected to sufficient heat exchange, and the red probability of the heating wire is reduced.

Preferably, the central angle of the notch is alpha, and the angle is more than or equal to 15 degrees and less than or equal to 90 degrees. The heat-exchange air flow heat; when alpha is less than 15 degrees, the gap is too small, the air flow convergence effect is not obvious, and the heat exchange with the heating wire is insufficient; when alpha is larger than 90 degrees, the gap is too large, so that the airflow at the gap can not be blown out of the shell for a long time, the probability of the reddening of the heating wire is increased, and the gap is too large, so that the winding of the heating wire is influenced, and the power of the heating unit is reduced.

Preferably, the heating wire is wound around a whole circle, and the heating power is improved; or the heating wire is only wound above the mounting bracket, the gap is opened, the weight of the heating unit is reduced, and the mica sheet is simple in mounting structure and convenient to assemble.

Preferably, the length of the gap is not less than 2/3 of the length of the mounting bracket, and after the heating unit is used for the hair dryer, the heating unit can be in a proper wind storage area, so that part of wind quantity can exchange heat with the heating unit. When the length ratio of the two is less than 2/3, the stored air volume is small and the heat exchange effect is not obvious.

Preferably, the installing support includes axial extension's first portion, the first portion is located to the breach, mica sheet and first portion joint, just a plurality of mica sheets evenly spaced sets up. The advantage is to supporting the heater, makes the heater atress even, prevents that the heater warp, produces the windage when making this heating unit be applied to electric blowing and causes the amount of wind loss.

Preferably, at least one of the mica sheets is arranged corresponding to the notch, and the mica sheet is provided with a free end which faces the notch and extends along the axial direction of the mounting bracket. The advantage is, supports the heater, prevents that the heater at breach department from warping.

Preferably, the mounting bracket further comprises a second part extending outwards along the circumferential direction of the first part at the rear end of the first part, and the rear end of the mica sheet is abutted against the inner side surface of the second part. The mica sheet fixing device has the advantage of improving the fixing reliability of the mica sheet.

Preferably, the back end of the mica sheet is provided with a clamping groove, and the clamping groove is abutted against the periphery of the second part. The mica sheet fixing device has the advantage of improving the fixing reliability of the mica sheet.

Preferably, a blocking sheet is arranged in the hollow channel, and the blocking sheet is arranged close to the front end of the hollow channel. The advantage is supporting the installing support, prevents that the installing support warp, and then leads to heating element to warp.

A hair drier comprises a shell, a handle component connected with the shell, a fan unit, a heating unit, an air inlet and an air outlet;

the fan unit is used for sucking air flow into the electric hair drier from the air inlet and blowing the air flow out of the air outlet to form a main air duct, and the heating unit is used for heating the air flow;

the fan unit comprises fan blades and a motor for driving the fan blades to rotate;

wherein the heating unit is the heating unit as described in any one of the above.

The electric hair drier heating wire has the advantages that the probability of reddening of the electric hair drier heating wire using the heating unit is reduced, and the use is safer.

Drawings

Fig. 1 is a schematic view of the whole structure of the hair dryer of the present invention.

Fig. 2 is a cross-sectional view 1 indicated by S in fig. 1 according to an example of the present invention.

Fig. 3 is a cross-sectional view 2 indicated by S in fig. 1 according to still another example of the present invention.

Fig. 4 is a cross-sectional view 3 indicated by S in fig. 1 according to another example of the present invention.

Fig. 5 is a schematic structural diagram of a notched tube according to an example of the present invention.

Fig. 6 is another angle structure diagram of the gap cylinder of the present invention.

Fig. 7 is a schematic view of another angle structure of the notched cylinder of the present invention.

Fig. 8 is a schematic structural view of the first air outlet of the present invention.

Fig. 9 is a schematic structural view of the first outlet at another angle according to the present invention.

Fig. 10 is a schematic view of another structure of the notched cylinder according to the present invention.

Fig. 11 is a schematic view of another structure of the notched cylinder according to the present invention.

Fig. 12 is a schematic view of yet another structure of the notched cylinder according to the present invention.

Fig. 13 is a schematic structural view of the first outlet according to the present invention.

Fig. 14 is a schematic structural diagram of the non-closed pipeline according to the present invention.

Fig. 15 is a schematic structural view of the heating unit of the present invention.

Fig. 16 is a schematic structural view of the auxiliary air duct of the present invention.

Fig. 17 is a schematic structural diagram of the reversing path according to the present invention.

Fig. 18 is a schematic view of another configuration of the commutation path.

The names of the components marked in the figures are as follows:

1. a housing; 2. a handle assembly; 3. a heating unit; 301. mica sheets; 3011. a free end; 302. a heater; 4. a first air inlet; 5. a first outlet, 6, an axial section; 7. a notched barrel; 701. a notch; 702. perforating; 703. a second notch; 8. a cylindrical wall; 9. a communication port; 10. an airflow inlet; 11. an auxiliary air outlet; 12. an open end; 13 an open part; 14. an extension portion; 15. a second notch; 16. an opening; 17. an air outlet member; 171. a barrier; 172. an outer ring; 173. ribs; 18. a non-enclosed conduit; 19. a first portion; 20. a second portion; 21. a barrier sheet; 22. an auxiliary air duct; 2201. an inlet section; 2202. an outlet section; 23. a second air outlet; 24. a mixed gas stream outlet; 25. a commutation path; 26. wind-guiding inclined plane.

Detailed Description

The following describes the present invention in detail with reference to the accompanying drawings.

As shown in fig. 1 to 6, a hair dryer comprises a housing 1, a handle assembly 2 connected with the housing 1, a fan unit, a heating unit 3, a first air inlet 4 and a first air outlet 5;

the fan unit is used for sucking air flow into the electric hair drier from the first air inlet 4 and blowing out the air flow from the first air outlet 5 to form a main air duct, and the heating unit 3 is used for heating the air flow;

the fan unit includes fan blades and a motor for driving the fan blades to rotate (the fan unit is not shown in the figure);

the main air duct comprises an axial section 6 extending along the axial direction of the shell 1, a notch cylinder 7 with a notch 701 is arranged in the shell 1, and the notch cylinder 7 and a cylindrical wall 8 inside the shell 1 define the axial section 6. The flow direction of the axial section 6 is as indicated by the arrows 2, 3, 4.

The fan unit can be arranged in the housing 1, in this case, the first air inlet 4 is located at the rear end of the housing 1, the first air inlet is located at the front end of the housing 1, and the heating unit 3 is arranged in the housing 1 and located in the axial section 6; the fan unit may also be disposed in the handle assembly 2, at this time, the first air inlet 4 is disposed on the handle assembly 2, the first air inlet 4 is located below the fan unit, the air outlet is located at the front end of the housing 1, and the heating unit 3 may be disposed in the housing 1, located in the axial section 6, or disposed in the handle assembly 2.

As shown in fig. 2 and 4, the cylindrical wall 8 inside the casing 1 may be an inner side wall of the casing 1, and the axial section 6 of the main air duct is defined by the inner side wall of the casing 1 and an outer side wall of the notched cylinder 7; it is also possible that the inner cylinder is provided in the housing 1 as a separate component, the axial section 6 of the main duct being defined by the inner side wall of the inner cylinder and the outer side wall of the cutaway cylinder 7.

Through the arrangement of the notch 701, at the moment of starting the electric hair drier, part of the airflow of the axial section 6 is collected and stored at the notch 701, or the airflow of the axial section 6 enters the inner space of the notch barrel 7 through the notch 701, and the rest airflow extends along the space defined by the cylindrical wall 8 and the outer side wall of the notch barrel 7 and is blown out from the air outlet, so that the air volume and the air pressure at the moment of starting are reduced; along with the lengthening of the working time of the electric hair drier, the air flow at the notch 701 or in the notch barrel 7 is gradually collected until saturation, the air volume and the air pressure are gradually improved and gradually constant, and the user experience is improved.

The following describes the notch 701, as shown in fig. 5, the notch 701 extends along the axis (B-B') of the notch barrel 7, the ratio of the length of the notch 701 to the length of the notch barrel 7 is not less than 1/2, the length of the notch 701 is L1, and the maximum length B of the notch barrel 7. The notch 701 may extend from the upstream end of the notch cylinder 7, or may extend from a position near the upstream end. In the present invention, "upstream" means a position close to the rear end of the housing 1, and "downstream" means a position away from the rear end of the housing 1. In this example, the ratio of the length of the notch 701 to the length of the notch cylinder 7 is 0.95. The area of the wind storage area is increased, and the instantaneous wind quantity and wind pressure of the motor during starting are effectively buffered.

The projection of the notch 701 along the axis perpendicular to the notch cylinder 7 has the maximum width A perpendicular to the axial direction of the notch cylinder 7, the projection of the notch cylinder 7 along the axis perpendicular to the notch cylinder 7 has the maximum width D perpendicular to the axial direction of the notch cylinder 7, and A/D is more than or equal to 0.1 and less than or equal to 1, so that the air quantity and the air pressure at the moment of starting the electric hair drier can be buffered, and the air quantity loss can be reduced; when A/D is larger than 1, the gap 701 is too large, so that a large amount of airflow is accumulated in the shell 1 and cannot be blown out from the air outlet in time, and the air quantity loss is serious; when A/D is larger than 0.1, the gap 701 is too small, and the buffer effect on the air volume and the air pressure at the moment of starting the electric hair drier is not obvious. Preferably 0.1. ltoreq. A/D. ltoreq.0.5, in this case A/D = 0.3. Furthermore, the notch 701 extends along the axial direction of the notch cylinder 7, the projection of the notch 701 along the axial direction perpendicular to the notch cylinder 7 also has the maximum length B parallel to the axial direction of the notch cylinder 7, A is less than B, and the electric hair dryer has the advantages of buffering the air volume and the air pressure at the moment of starting the electric hair dryer and reducing the air volume loss.

As shown in fig. 6, the central angle of the notch 701 is α, α is greater than or equal to 15 ° and less than or equal to 180 °, which has the advantages of buffering the air volume and the air pressure at the instant of starting the hair dryer, ensuring no serious loss of the air pressure and the air volume, and rapidly drying the hair; when the alpha is less than 15 degrees, the gap 701 is too small, and the buffer effect on the air volume and the air pressure at the moment of starting the electric hair drier is not obvious; when alpha is larger than 180 degrees, the gap 701 is too large, so that a large amount of airflow is accumulated in the shell 1 and cannot be blown out from the air outlet in time, and the air quantity loss is serious. Still further, α ≦ 15 ≦ α ≦ 90 °, with 30 ≦ α ≦ 60 ° being preferred, and α =45 ° in this example. The central angle α is an angle formed by the longest two lines from the two ends forming the notch 701 to the axis of the notch cylinder 7.

As shown in fig. 2, 3 and 4, a communication port 9 is formed at the joint of the handle assembly 2 and the housing 1 to communicate the two, and the notch 701 extends to the upstream side of the communication port 9; alternatively, a communication port 9 for communicating the handle assembly 2 and the housing 1 is formed at the joint of the two, and the notch 701 extends to/beyond the downstream side of the communication port 9; or the notch 701 extends between the upstream side and the downstream side of the communication port 9. In this example, the notch 701 passes downstream of the communication port 9.

Intercommunication mouth 9 and the setting of staggering of breach 701, the utility model provides a "stagger" indicates that the edge of breach 701 all staggers with intercommunication mouth 9, reachs the intercommunication mouth 9 on the breach section of thick bamboo 7 apart from the shortest lateral wall for a breach section of thick bamboo 7. The notch 701 is located above the axis of the housing 1, and further, the notch 701 is symmetrically disposed about the axis of the handle assembly 2.

As shown in fig. 3 to 7, the notched tube 7 is provided with a through hole 702 for allowing the airflow of the main air duct to enter the notched tube 7, and the projections of the through hole 702 and the notch 701 at least partially overlap. The projections of the axes of the through hole 702 and the notch 701 are parallel or coincide, preferably the projection of the notch 701 overlaps the projection of the through hole 702, i.e. the projections of the axes of the through hole 702 and the notch 701 coincide. The axis of the notch 701 in this example is parallel to the axis (b-b') of the notch cylinder 7.

Further, as shown in fig. 5, the width of the through hole 702 may be the same as the width of the notch 701; alternatively, the width of the perforation 702 is less than the width of the notch 701; alternatively, the width of the perforation 702 is greater than the width of the notch 701. In this example, the width of the through hole 702 is smaller than the width of the notch 701. The width of the through hole 702 is K1, which refers to the maximum width perpendicular to the axis of the notched cylinder 7 when projected in the direction perpendicular to the axis of the notched cylinder 7; the length of the through hole 702 is K2, which means the maximum length parallel to the axis of the notched cylinder 7 when projected in a direction perpendicular to the axis of the notched cylinder 7.

Further, the length of the through hole 702 is smaller than that of the notch 701, so that the loss of air volume and air pressure is reduced.

Further, the centerline (kc-kc') of the perforation 702 is parallel to or coincides with the projection of the centerline of the handle assembly 2. It will be appreciated that the centerline of the bore 702 intersects the projection of the centerline of the handle assembly 2.

Further, the through hole 702 is located below the axis of the cylindrical wall 8 and is opposite to the airflow inlet 10.

Further, an airflow guide part is arranged on the gap cylinder 7, and the airflow guide part enables airflow entering the gap cylinder 7 to extend along the axis direction of the shell 1. The airflow guiding part is an air guide inclined surface 26 (not shown in the figure) positioned on the side wall of the notch barrel 7, and the inclined surface is preferably in a streamline shape to reduce the air volume loss; the air guide slope 26 may be provided on another structural member inside the notched cylinder 7.

Furthermore, the front end of the gap cylinder 7 is provided with an auxiliary air outlet 11, and the airflow in the gap cylinder 7 is blown out from the auxiliary air outlet 11, so that the air volume and the air pressure are increased.

It can be understood that the notch cylinder 7 is provided with a perforation 702 for allowing the air flow of the main air duct to enter the notch cylinder 7, and the perforation 702 is located on the upstream side of the starting end of the notch 701 and is arranged opposite to the starting end of the notch 701.

When the fan unit is arranged in the handle assembly 2, the first air inlet 4 is arranged on the handle assembly 2, the first air inlet 4 is positioned below the fan unit, the main air duct comprises a vertical section defined by the handle assembly 2, an air inlet 10 for air flow to enter the axial section 6 from the vertical section is defined at the joint of the handle assembly 2 and the shell 1, and the notch 701 and the air inlet 10 are arranged in a staggered mode. The air inlet 10 is arranged on the cylindrical wall 8, the air inlet 10 and the communication port 9 are correspondingly arranged, and the center line of the air inlet 10 is the same as that of the handle assembly 2. The notch 701 is positioned above the axis (a-a') of the cylindrical wall 8, so that most of airflow in the vertical section enters the axial section 6 and then is directly blown out of the air outlet, and the loss of air volume and air pressure is reduced; meanwhile, the hair dryer is beneficial to quickly drying hair; and further, the notch 701 is disposed opposite to the airflow inlet 10. Furthermore, the notch cylinder 7 is provided with a perforation 702 for enabling the airflow of the main air duct to enter the notch cylinder 7, the perforation 702 is located below the axis of the cylinder wall 8 and is arranged opposite to the airflow inlet 10, and the advantage is that the airflow in the vertical section enters the notch cylinder 7 through the shortest distance, so that the loss of the air volume is reduced.

As another example, the notch 701 is a perforation 702 that allows airflow into the notch barrel 7.

As shown in fig. 8 to 14, the first air outlet 5 is a non-closed slit at the end of the axial section 6. In the present invention, the term "non-closed gap" refers to a long and narrow gap in which the first outlet 5 as a whole has two open ends 12, and the region (referred to as an open portion 13) formed between the open ends 12 is not used for blowing out the air flow of the axial section 6 of the main duct. The non-closing gap may be a continuous gap for the air stream blowing out of the main duct axial section 6; the air flow blowing device may be formed by combining a plurality of small gaps for blowing out the air flow of the main duct axial section 6 (i.e., it may be considered that a continuous gap is interrupted by a rib 173 in the middle to increase strength), and the space between the opening end 12 of the opening 13 formed between the starting end of the first small gap and the end of the last small gap may be solid or in other forms.

The advantage of making the first air outlet 5 be a non-closed slit is that the air pressure of the air flow blown out from the first air outlet 5 is large, the air flow of the open part 13 of the non-closed slit is driven by the partial air flow to flow, the air pressure of the air flow is small, two air flows outside the hair dryer are gathered into one air flow at a certain distance from the first air outlet 5 and before reaching the surface of the hair, the air pressure is properly reduced, when long hair is blown, the flying angle of the hair is not easy to be too large, and the hair is messy in the hair blowing process and after the hair is blown; when the hair is shorter, the force applied to the hair roots is smaller, when a user only needs to dry the hair without styling, the original direction of the hair roots cannot be changed even if the user blows the hair in one direction for a long time, and the hair after being blown is easier to be managed.

As shown in fig. 9, the width of the non-closed gap is d, d is not less than 1mm and not more than 20mm, which not only can improve the wind pressure, but also can increase the air output in unit time; when d is less than 1mm, the air output in unit time is less, and more air flow is accumulated in the shell 1; when d is larger than 20mm, the air flow is not concentrated when being blown out from the first air outlet 5, and the hair drying efficiency is slow. Further, d is 5 mm. ltoreq. d.ltoreq.10 mm, preferably d =8 mm. The width of the non-closed gap is d, the length of the non-closed gap is L, and d/L is more than or equal to 0.05 and less than or equal to 0.5, so that the air outlet volume and the air pressure are considered; when d/L is less than 0.05, under the condition of a certain length L, the air output in unit time is less, more air flow is accumulated in the shell 1, and under the condition of a certain width d, the volume of the whole machine is increased, the whole machine is not attractive and is not easy to store; when d/L is larger than 0.5, the air flow in the shell 1 can be quickly blown out from the first air outlet 5 under the condition of a certain length L, but the air pressure is small, so that wet hair cannot be blown away, and under the condition of a certain width d, the air flow in the shell 1 cannot be blown out, so that the air flow is accumulated in the shell 1, and the air volume is lost. The width d refers to a connecting line between two points which are farthest away and parallel to the vertical line of the central line on the non-closed gap when the non-closed gap is sectioned along the direction perpendicular to the central line of the non-closed gap; the length L is the length of the line connecting the two points of the center and the center of the starting end and the center of the ending end of the two non-closed slits, and if the line connecting the two points is a curve, the length of the arc line with the shape close to the shape of the non-closed slits is L (not shown in the figure).

The non-closed gap is provided with an open part 13, the central angle beta of the open part 13 is more than or equal to 15 degrees and less than or equal to 180 degrees, and the advantages that the wind pressure reaching the hair can be reduced, the airflow can be blown out from the shell 1 in time, and the wind pressure can not generate large loss; when the beta is less than 15 degrees, the effect of wind pressure drop is not obvious, the hair is easily blown disorderly, and if the hair is blown against the hair roots for a long time for drying the hair, the hair roots are easily in an unwanted direction; when beta is larger than 180, the first air outlet 5 is too small, so that airflow is easy to accumulate in the shell 1 and can be blown out from the first air outlet 5 in time, and air volume loss is caused. The central angle β is an angle formed by connecting both ends (i.e., the start end and the end of the non-closed slit) of the open portion 13 and the center of the non-closed slit; if both ends of the open portion 13 have a certain width or if the shape of the end is irregular, the angle is formed by two lines having the smallest length of the central connecting line of the non-closed slit at both ends. Further, β ≦ 15 ≦ 90 °, preferably β =45 °. The center angle β is the angle formed by the longest two lines from the open end 12 to the centerline of the non-closed slot. The centerline of the non-closing slit is the same as the axis of the notched barrel 7 of the notch 701. The airflow portion of the main duct is blown out from the opening portion 13.

The width of the non-closed gap is d, the projection of the open part 13 along the direction vertical to the central line of the non-closed gap has the maximum width d1, d/d1 is more than or equal to 0.1 and less than or equal to 1, and the advantages that the open part 13 can play a role in reducing the whole wind pressure, the airflow of the main air duct can be blown out in time, and the air flow is prevented from accumulating inside the shell 1 to cause air volume loss; when d/d1 is less than 0.1, the opening part 13 is too large, the wind pressure loss is large, the wet hair is not easy to disperse, the drying efficiency is reduced, and the d is too small, so that the airflow is easy to accumulate in the shell 1 to cause the air volume loss; when d/d1 is larger than 1, the opening part 13 is too small, the effect of wind pressure drop is not obvious, the hair is messy after being dried, and the d is too large, so that the wind pressure is not improved, and the wet hair is scattered.

The open part 13 is positioned at one side of the center line of the non-closed gap, which means that the non-closed gap is arranged around the center line, and the center of the non-closed gap is positioned at the inner side, so that the air flow of the main air duct blown out from the first air outlet 5 and the air flow at the open part 13 driven by the air flow form a whole circle, and the two air flows are converged into one before reaching the hair according to the distance between the first air outlet 5 and the hair when a user blows the hair, thereby improving the hair blowing effect.

The open portion 13 is located above the center line of the housing 1. According to the habit that the user holds the electric hair drier in the hair blowing process, the area below the central line of the shell 1 is a part which plays a main role all the time in the whole hair blowing process, the air flow at the opening part 13 is mainly driven by the air flow of the main air duct blown out from the first air outlet 5 to generate, the air volume and the air pressure are relatively small, if the user habit blows the first air outlet 5 of the electric hair drier close to the hair, then two air flows reach the surface of the hair before being converged into one, the opening part 13 is positioned above the central line of the shell 1, so that the large air pressure and more air flows are favorably blown to the hair, and the purpose of quickly drying the hair is achieved.

The open portion 13 has both ends located on both sides of the centerline of the handle assembly 2. Both ends of the open portion 13 may be symmetrical or asymmetrical with respect to both sides of the center line of the handle assembly 2.

As shown in fig. 9, the non-closed projection is defined by a plurality of curves, which are enclosed end to end, i.e. the non-closed slit is defined by a plurality of members. Further, a notched cylinder 7 is provided in the housing 1, the axial section 6 is defined by the notched cylinder 7 and a cylindrical wall 8 inside the housing 1, and the non-closed gap is defined by the notched cylinder 7 and the cylindrical wall 8. The notch 701 extends in the axial direction of the housing 1, and the notch 701 may extend from the upstream end of the notch cylinder 7 to the downstream side thereof, or may extend from the downstream end of the notch cylinder 7 to the upstream side thereof. In one example of the non-closed gap, the cylindrical wall 8 is provided with an extension portion 14 extending downward, the extension portion 14 closes a part of the gap between the notched cylinder 7 and the cylindrical wall 8 to form the non-closed gap, in one case, the gap between the notched cylinder 7 and the cylindrical wall 8 is annular, the extension portion 14 closes a part of the annular gap to form the non-closed gap, the extension portion 14 abuts against the outer side wall of the notched cylinder 7, and the open portion 13 is the extension portion 14. The non-closed gap is in a similar shape such as a C shape, a U shape and the like; alternatively, as shown in fig. 10, the notch 701 is provided at the front end of the notch cylinder 7, the extending portion 14 closes at least a part of the notch 701, and the non-closing gap is in a similar shape such as a C shape or a U shape. Further, the notch 701 extends from the front end of the notch barrel 7 to the rear, and the ratio of the length of the notch 701 to the length of the notch barrel 7 is not less than 1/2. The extension part 14 closes the notch 701, so that the shape of the airflow in the axial section 6 before reaching the non-closed gap is substantially the same as the shape of the airflow in the axial section 6 before reaching the non-closed gap, the airflow in the axial section 6 is quickly blown out from the first air outlet 5 along the limitation of the side wall of the extension part 14, the side wall of the notch cylinder 7 and the cylindrical wall 8, the airflow is not accumulated in the housing 1, and the air volume loss is reduced.

As another example, as shown in fig. 11 and 12, the front end of the notch cylinder 7 is provided with a second notch 15703701 spaced from the notch 701, and the extension 14 closes the second notch 15703701 to form the non-closed gap. The non-closed slit has an open part 13, the open part 13 faces the same direction as the notch 701, the open part 13 is a second notch 15703701, and preferably, the open part 13 and the notch 701 have the same axis, which is beneficial to reducing air loss.

In another example, as shown in fig. 13, the end of the outer casing 1 has an opening 16, the opening 16 is provided with a wind outlet member 17, the wind outlet member 17 includes a baffle 171 located in the middle and an outer ring 172 located in the outer, the outer ring 172 and the baffle 171 are connected by a rib 173, and the non-closed gap is defined by the outer ring 172 and the baffle 171. Alternatively, the housing 1 is provided with an inner cylinder, and the air outlet member 17 is mounted on the inner cylinder.

In yet another example, a barrier 171 is provided in the cylindrical wall 8, the barrier 171 and the cylindrical wall 8 are connected by a rib 173, and the non-closed gap is defined by the cylindrical wall 8 and the barrier 171.

It will be understood that the flow of air of the axial section 6 comprises an annular flow of air before reaching the non-closed slit, the annular flow of air being blown out from the non-closed slit; in this case, an inner tube is provided in the housing 1, and the annular gas flow is defined by an outer wall of the inner tube and a cylindrical wall 8 inside the housing 1.

As shown in fig. 14, the projection of the non-closed slit is enclosed by a single closed curve, i.e., the non-closed slit is defined by one member. More specifically, a non-closed duct 18 is provided in the casing 1, the air flow having the same shape as the non-closed gap defined by the non-closed duct 18, the non-closed gap being located at the end of the non-closed duct 18, the air flow of the axial section 6 including the air flow having the same shape as the non-closed gap before reaching the non-closed gap, and the air flow being blown out from the non-closed gap.

As shown in fig. 1 to 15, the heating unit 3 is disposed in the axial section 6, the heating unit 3 includes a notch cylinder 7, the notch cylinder 7 has a notch 701 extending in an axial direction thereof, and the notch cylinder 7 and the cylindrical wall 8 inside the housing 1 define the axial section 6. Through the setting of breach section of thick bamboo 7, it is that the air current can collect temporarily in the inside of shell 1, makes air current and heating unit 3 have sufficient time to carry out heat transmission, then blows out from first air outlet 5 under the drive of other air currents again, avoids heater 302 to redden, uses safelyr.

In one example, the ratio of the length of the notch 701 to the length of the notch cylinder 7 is not less than 1/2, so that the air outlet area is formed to exchange heat with the heating unit 3, and the heating wire 302 is prevented from being red. Further, the length of the notch 701 is not less than 2/3 of the length of the notch barrel 7. The heating unit 3 further comprises a plurality of mica sheets 301 arranged on the gap barrel 7 and a heating wire 302 wound on the mica sheets 301, wherein the mica sheets 301 are at least arranged on two sides of the gap 701; further, the plurality of mica sheets 301 are uniformly arranged at intervals along the axial direction of the notched cylinder 7. The heater 302 is looped through a full turn; or the heating wire 302 is only wound above the mounting bracket, and the gap 701 is opened.

For another example, at least one of the mica sheets 301 is disposed corresponding to the notch 701, and the mica sheet 301 has a free end 3011 facing the notch 701 and extending along the axial direction of the mounting bracket. In this case, a structure for fixing the mica sheets 301 is provided at a position of the notched cylinder 7 corresponding to the notch 701, and especially when the length of the notch 701 is long, card slots for fixing the mica sheets 301 are provided at two ends of the notched cylinder 7; the extending direction of the mica sheet 301 is the same as that of the notch 701, and the mica sheet 301 is arranged right above the notch 701.

In another example, the notched cylinder 7 is a ceramic heating device.

Further, the fan unit is arranged in the handle assembly 2, the cylindrical wall 8 is provided with an airflow inlet 10, airflow in the handle assembly 2 enters the housing 1 from the airflow inlet 10, and the notches 701 and the airflow inlet 10 are arranged in a staggered manner.

Furthermore, the notch cylinder 7 is provided with a through hole 702 opposite to the airflow inlet 10, the airflow enters the notch cylinder 7 through the through hole 702, the airflow can promote the airflow at the notch 701 to flow, and the airflow collected at the notch 701 blows out from the first air outlet 5 to take away heat.

The utility model discloses still relate to a heating element 3 of hairdryer, including a plurality of mica sheets 301 and the heater 302 of coiling on mica sheet 301, wherein, heating element 3 is still including the installing support that has hollow channel, a plurality of mica sheets 301 are installed on the installing support, the installing support has along its axially extended breach 701, the both sides of breach 701 are located at least to a plurality of mica sheets 301. In one example, the hollow mounting bracket is the notched cylinder 7 described above.

The mounting bracket further comprises a second part 20 extending outwards along the circumferential direction of the first part 19 at the rear end of the first part 19, and the rear end of the mica sheet 301 abuts against the inner side surface of the second part 20. The advantage is to improve the fixing reliability of the mica sheet 301. The first part 19 is a notched barrel 7 and the second part 20 is annular or circular or U-shaped or C-shaped.

The rear end of the mica sheet 301 is provided with a clamping groove which is abutted against the periphery of the second part 20.

Be equipped with separation plate 21 in the hollow passage, separation plate 21 is close to the front end setting of hollow passage, and the benefit is when breach 701 length is longer, improves the intensity of cavity installing support through separation plate 21, prevents that the installing support warp, leads to producing great windage to the air current of axial sector 6, causes the amount of wind loss.

As shown in fig. 1 to 18, a hair dryer comprises a housing 1, a handle assembly 2 connected with the housing 1, a fan unit, a heating unit 3, a first air inlet 4 and a first air outlet 5;

the fan unit is used for sucking air flow into the electric hair drier from the first air inlet 4 and blowing out the air flow from the first air outlet 5 to form a main air duct, and the heating unit 3 is used for heating the air flow;

the fan unit comprises fan blades and a motor for driving the fan blades to rotate;

the hair dryer also comprises an auxiliary air duct 22 extending around the axial section 6, and at least part of the air flow of the auxiliary air duct 22 and at least part of the air flow of the axial section 6 are mixed in the shell 1 and then blown out. If the two air flows are independently blown out firstly and are mixed outside the shell 1, if the first air outlet 5 is not far away from the surface of the hair, the two air flows are not mixed and reach the hair, the force felt by the same area is different, and due to the difference of the air volume and the wind power of the two air flows, the hair in the same area is dry, and the hair is not dry; the air flow of the auxiliary air duct 22 is cold air flow, the air flow of the axial section 6 is hot air flow, and the cold air flow and the hot air flow are mixed and blown out, so that hot spots are prevented from being generated, and the scalp cannot be scalded when blown against the same area of the scalp for a long time. When the air current of supplementary wind channel 22 is the air current of same nature, mix in shell 1 through two air currents and make the air current arrive the hair no matter the distance of first air outlet 5 distance, the dynamics of feeling in same region differs little, the hair in same region can be dried by blowing simultaneously, it can to move the hair-dryer and blow the hair in other regions, perhaps do not dry earlier according to individual habit, blow back and forth also can, the hair in whole region is close to and is dried by blowing simultaneously, the hair that is dried by blowing repeatedly, wet hair ratio can not be many, reduce the probability that the hair caused the damage.

As shown in fig. 16 and 17, the secondary air duct 22 includes an inlet section 2201 and an outlet section 2202, and the air flow of the axial section 6 and the air flow of the inlet section 2201 at the inlet section 2201 are independent from each other. In one example, the first air inlet 4 is disposed at the rear end of the housing 1, an inner tube is disposed in the housing 1, the inner tube divides the air flow sucked into the housing 1 by the fan unit into the auxiliary air duct 22 and the main air duct (i.e., the axial section 6 of the main air duct in this example), the inlet section 2201 is defined by the outer side wall of the inner tube and the inner side wall of the housing 1, the axial section 6 is defined by the inner side wall of the inner tube, the air flows of the two air ducts are first independent of each other, are mixed in the housing 1 near the first air outlet 5, and are then blown out from the same. The same outlet may be the first air outlet 5 of the main air duct, or may be another outlet additionally provided.

Further, the fan unit is arranged in the handle assembly 2, the first air inlet 4 is located in the handle assembly 2, and the rear end of the axial section 6 is sealed, so that the air pressure loss of the main air duct is reduced. Further, a second air inlet (not shown) of the auxiliary air duct 22 is disposed at the rear end of the housing 1, and the first air inlet 4 is located downstream of the second air inlet.

As another example, the front end of the housing 1 includes a mixed airflow outlet 24, a part of the airflow of the axial section 6 and at least a part of the airflow of the secondary air duct 22 are mixed and then blown out from the mixed airflow outlet 24, and a part of the airflow of the axial section 6 is blown out from the first air outlet 5. The first outlet 5 is located outside the mixed airflow outlet 24, and the first outlet 5 is arranged around the mixed airflow outlet 24, so that the airflow blown out from the first outlet 5 is annular or approximately annular, and the annular airflow surrounds the airflow moving along the straight line, so that the airflow blown out from the first outlet 5 can be promoted to flow forwards along the axis of the housing 1 to reach the hair surface. "approximately annular" includes a plurality of spaced small outlets collectively forming a ring, or a ring with a gap 701 (e.g., U-shaped, C-shaped), and other similar shapes. Further, a second air outlet 23 is further disposed at the front end of the housing 1, and a part of the air flow of the auxiliary air duct 22 is blown out from the second air outlet 23 alone. The second air outlet 23 is located at the outer side of the first air outlet 5, and the second air outlet 23 is arranged around the first air outlet 5. In this example, the airflow of the axial section 6 and the airflow of the auxiliary air duct 22 are divided into two flows in the housing 1, a part of the airflow of the axial section 6 is mixed with a part of the airflow of the auxiliary air duct 22 and then blown out from the mixed airflow outlet 24, the other airflow of the axial section 6 is blown out from the first air outlet 5, and the other airflow of the auxiliary air duct 22 is blown out from the second air outlet 23.

As another example, the air flow in the auxiliary air duct 22 merges into the axial section 6 and blows out from the first air outlet 5, in this case, the air flow outlet is only the first air outlet 5, and the whole air flow in the auxiliary air duct 22 merges into the axial section 6; or the front end of the housing 1 is further provided with a second air outlet 23, part of the air flow of the auxiliary air duct 22 is converged into the main air duct and blown out from the first air outlet, and the rest of the air flow is blown out from the second air outlet 23.

Further, an inner cylinder for separating the axial section 6 from the auxiliary air duct 22 is arranged in the housing 1, and a passage for allowing the air flow of the auxiliary air duct 22 to enter the axial section 6 is arranged on the inner cylinder. When the heating unit 3 is disposed at the axial section 6, the inner cylinder plays a role of heat insulation, preventing the outer shell 1 from being overheated and scalded after being blown for a long time.

The main air duct comprises an axial section 6 extending along the axial direction of the shell 1, an inner cylinder is arranged in the shell 1, the axial section 6 is at least limited by the inner cylinder, the electric hair dryer further comprises an auxiliary air duct 22 extending around the axial section 6, the auxiliary air duct 22 is limited by the inner cylinder and the shell 1, a reversing passage 25 is arranged on the inner cylinder, and the air flow of the auxiliary air duct 22 is changed by the reversing passage 25 and is mixed with the air flow of the axial section 6 to be blown out. The diverting passage 25 is a passage provided on the inner cylinder.

The inner cylinder is provided with an air guide inclined surface 26 which enables the air flow of the auxiliary air duct 22 to enter the reversing passage 25. The air guide slope 26 reduces the air volume loss of the air flow caused by the air flow entering the reversing passage 25. The air guide slope 26 extends from upstream to downstream of the casing 1 in the axial direction of the casing 1. The centre line of the commutation passage 25 is at an angle to the centre line of the axial section 6, and the angle is no more than 90 °. The air flow changes direction through the reversing passage 25, so that the acting force on the air flow blown out along the axial direction is reduced, and the wind power loss is reduced; when the angle is larger than 90 degrees, the airflow passing through the reversing passage 25 generates an acting force opposite to the airflow flowing forwards in the axial direction, so that the wind power reaching the surface of the hair is reduced, the wet hair is not blown away, and the drying efficiency is reduced. The angle is not less than 10 degrees, the air flow is mixed through a short path, air volume loss is reduced, when the angle is less than 10 degrees, the mixed air flow needs to pass through a long path, air volume loss is caused, and mixing efficiency and air speed are reduced. The centre line of the commutation passage 25 in this example is at an angle of 90 to the centre line of the axial section 6; furthermore, the angle formed by the air guide inclined plane 26 and the central line of the reversing passage 25 is gamma, gamma is more than or equal to 10 degrees and less than or equal to 60 degrees, and the air guide device has the advantages that the air flow is guided into the reversing passage 25, and the air volume loss caused by the air flow entering the reversing passage 25 is reduced; when gamma is larger than 60 degrees, airflow can cause air quantity loss at the corners of the air guide inclined plane 26 and the reversing passage 25; when gamma is less than 10 degrees, air flow easily causes air quantity loss when entering the reversing passage 25 through the air guide inclined plane 26; the air flow of the air deflection channel is preferably gamma =30 °.

The air flow of the auxiliary air duct 22 changes its direction through the reversing passage 25 and spatially intersects with the air flow of the axial section 6. In this example, the diverting passage 25 has a length and a width, and the flow in the diverting passage 25 is independent of the flow in the axial section 6, and more specifically, the flow in the diverting passage 25 is independent of the flow in the axial section 6 along its centerline.

The reversing path 25 is defined by an extension 14 of the inner cylinder extending in the axial direction of the housing 1, the extension 14 spanning the first outlet 5. In this example, at least part of the air flow of the auxiliary air duct 22 is mixed with the air flow of the main air duct through the reversing passage 25, and the air flow of the axial section 6 is divided into two flows inside the housing 1, wherein one flow is blown out from the first air outlet 5, and the other flow is mixed with the air flow of the auxiliary air duct 22 and then blown out from the mixed air flow outlet 24 located inside the first air outlet 5. Further, the heating unit 3 is disposed in the inner cylinder, the heating unit 3 includes a mounting bracket having a hollow passage, an end of the mounting bracket defines a mixed airflow outlet 24, a part of the airflow of the auxiliary air duct 22 is mixed with the airflow of the axial section 6 and then blown out from the mixed airflow outlet 24, and the first air inlet 4 is defined by the inner cylinder and the mounting bracket. Furthermore, a gap 701 is arranged on the mounting bracket, and the extending part 14 blocks the gap 701.

A second air outlet 23 is further formed in the inner cylinder, and partial air flow of the auxiliary air duct 22 is blown out from the second air outlet 23. The first air outlet 5 is located between the second air outlet 23 and the mixed air outlet 24. An annular ring is arranged on the outer side of the inner cylinder, the annular ring is connected with the outer side wall of the inner cylinder through a connecting rib, and the second air outlet 23 is annular; the second outlet can also be defined by an interlayer between the inner barrel and the outer shell.

The utility model discloses in, the axis of the central line of shell, the axis of shell, the central line of inner tube, the axis of inner tube, the central line of a breach section of thick bamboo, the axis of a breach section of thick bamboo are the same.

The above embodiments are merely preferred embodiments of the present invention, not all embodiments of the present invention, and according to the principles of the present invention, those skilled in the art can make various modifications without departing from the spirit of the present invention, all of which shall fall within the scope of the present invention defined by the claims.

Claims (10)

1. The utility model provides a heating unit of hairdryer, includes a plurality of mica sheets and the heater of coiling on the mica sheet, its characterized in that, heating unit is still including the installing support that has hollow channel, a plurality of mica sheets are installed on the installing support, the installing support has along its axially extended breach, the both sides of breach are located at least to a plurality of mica sheets.

2. The heating unit of claim 1, wherein the center angle of the notch is α, 15 ° ≦ α ≦ 90 °.

3. The heating unit of claim 1, wherein the heater wire is looped around a full turn; or the heating wire is only wound above the mounting bracket, and the gap is opened.

4. The heating unit of claim 1, wherein the length of the gap is no less than 2/3 of the length of the mounting bracket.

5. The heating unit of claim 1, wherein the mounting bracket includes a first portion extending axially, the notch is disposed in the first portion, the mica sheets are clamped to the first portion, and the plurality of mica sheets are disposed at uniform intervals.

6. The heating unit of claim 5, wherein at least one of the plurality of mica sheets is disposed in correspondence with the gap and has a free end extending axially along the mounting bracket towards the gap.

7. The heating unit of claim 6, wherein the mounting bracket further comprises a second portion extending outwardly in a circumferential direction of the first portion at a rear end of the first portion, the rear end of the mica sheet abutting an inner side of the second portion.

8. The heating unit of claim 7, wherein the rear end of the mica sheet has a snap groove that abuts a periphery of the second portion.

9. The heating unit of claim 1, wherein a baffle is disposed within the hollow passage, the baffle being disposed proximate a front end of the hollow passage.

10. A hair drier comprises a shell, a handle component connected with the shell, a fan unit, a heating unit, an air inlet and an air outlet;

the fan unit is used for sucking air flow into the electric hair drier from the air inlet and blowing the air flow out of the air outlet to form a main air duct, and the heating unit is used for heating the air flow;

the fan unit comprises fan blades and a motor for driving the fan blades to rotate;

characterised in that the heating unit is a heating unit according to any one of the preceding claims.

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