KR20200116277A - hair dryer - Google Patents

Abstract

A hairdryer according to the present invention comprises: a case having an inlet through which air is introduced and an outlet through which air is discharged, forming a flow path through which air flows therein, and having a handle at the lower side; a driving unit disposed in the case and mounted on the inlet of the case, and including a first hub, a fan forming a plurality of blades around the first hub, a motor disposed at the rear end of the fan based on the flow of air to provide power so that the fan rotates, and a housing supporting the motor; and an inducer forming a second hub on a central part, forming a plurality of wings around the second hub, fixed inside the case, disposed at the front end of the fan based on the flow of air, and guiding the air introduced through the inlet to flow to the fan. Accordingly, the hairdryer can shorten the hair drying time.

Description

Hair dryer

The present invention relates to a hair dryer.

In general, a hair dryer is used to dry hair by blowing hot wind caused by a heat ray to the outside or to create various hairstyles.

The hair dryer includes a heating wire, a blowing fan, a motor, and a heating wire fixed to a support member in a case formed of a heat-resistant material, and a handle is provided on one side of the case. The hair dryer heats the heating wire according to the operation of the user and drives the blowing fan to discharge the heat generated by the heating wire to the outside through the discharge port.

In the conventional hair dryer, since many parts such as a heating wire, a blower fan, a motor, and a heating wire are mounted in the case, the length of the case is considerably increased, and the weight of the externally molded product increases considerably.

In addition, since the hair dryer is disposed close to the ear to dry the hair, the user feels discomfort due to noise.

In Korean Patent Application Laid-Open No. 10-2013-0064136 (hereinafter,'Prior Document 1'), a low-noise hair dryer is disclosed.

In the case of Prior Literature 1, a first fan (Sirocco fan) and a second fan (axial fan) are provided in one motor, and air is blown forward for a second time to achieve an increase in air volume.

However, in the case of Prior Document 1, the effect of increasing the actual air volume is not large, and there is a problem that only the size of the fan-motor increases. For reference, in order to increase the air volume by using two fans, two axial fans must be connected in series and a stator must be placed in the middle.

In Korean Patent Application Laid-Open No. 10-2015-0071896 (hereinafter,'Prior Document 2'), a hair dryer is disclosed.

In the case of Prior Document 2, a plurality of blowing fans are provided and the angles of the blades are different to achieve an increase in efficiency and a reduction in noise.

However, even in the case of Prior Document 2, the size of the fan-motor will increase, and there is a problem that noise increases with a plurality of fans.

The problem to be solved by the present invention is to provide a hair dryer capable of shortening the hair drying time by increasing the air volume of the fan while maintaining the size of the hair dryer and the specifications of the fan and motor.

The hair dryer according to an embodiment of the present invention has an inlet through which air is introduced and an outlet through which air is discharged, forms a flow path through which air flows, and a case provided with a handle at the lower side, and the case A fan disposed at the inlet side of the case and forming a plurality of blades around the first hub and the first hub, and disposed at a rear end of the fan based on the flow of air so that the fan rotates, A drive unit including a motor providing power, a housing supporting the motor, and a second hub formed at a center portion, forming a plurality of blades around the second hub, and being fixed inside the case, It is disposed at the front end of the fan based on the flow of the air, and includes an inducer for guiding the air introduced through the inlet to flow to the fan.

While the fan rotates by the driving of the motor, the inducer does not rotate and maintains a fixed state inside the case.

The inducer includes a cylindrical fixing ring fixed to an inner surface of the case, the second hub is disposed in the center of the fixed body, and the wing is an outer surface of the second hub and an inner peripheral surface of the fixed body Connect.

The diameter of the second hub gradually increases based on the flow direction of air, and at least a portion of the second hub has a curved surface.

At least part of the wing is made of a curved surface.

The blades are formed in parallel with the direction of the rotation axis of the fan, form an inlet through which air is introduced, and an outlet angle equal to or similar to the inlet angle of the blade of the fan, and the air introduced into the inlet is discharged through which air is discharged. It connects the part and the introduction part and the discharge part, and includes a connection part made of a curved surface.

The difference between the inlet angle of the blade of the fan and the outlet angle of the discharge portion of the blade is 10 degrees or less.

Based on the flow direction of the air, the tip of the fixing ring protrudes further toward the inlet than the tip of the second hub and the blade.

The inducer has a concave rear end facing the fan to form a cavity.

The rear end of the blade protrudes further toward the fan than the rear end of the second hub.

Based on the axial direction of the fan, the length of the second hub is formed to be shorter than the length of the blade.

At least a portion of the first hub of the fan is accommodated in the cavity of the inducer.

The spacing between the blades of the fan and the blades of the inducer is maintained within a range of 1 mm or less.

The first hub of the fan and the second hub of the inducer have planes facing each other.

The case includes a first body extending in a first direction, a second body extending in a vertical direction with the first body, and coupled to an end portion of the first body, and the inlet portion includes an end portion of the first body And the discharge portion is formed at an end of the second body.

The driving part and the inducer are disposed coaxially with the first body inside the first body.

A plurality of diffuser vanes through which the air discharged from the fan passes is formed between the motor and the inner circumferential surface of the case.

According to the present invention, while maintaining the size of the hair dryer and the specifications of the fan and the motor, the air volume of the fan is increased, thereby reducing the drying time of the hair.

In addition, there is an effect of increasing the fan efficiency of the hair dryer.

In addition, air is introduced at the inlet angle of the fan blade, thereby reducing the inlet loss.

In addition, there is an effect of increasing the air volume of the hair dryer by adding only an inducer to the existing hair dryer.

In addition, there is an effect of preventing an increase in noise due to an increase in air volume.

1 is a perspective view of a hair dryer according to an embodiment of the present invention.
2 is a cross-sectional view of portion'A' of FIG. 1.
3 is a cross-sectional view showing a connection portion between an inducer and a fan.
4 is a perspective view of an inducer.
5 is a side view of the inducer.
6 is a diagram comparing an arrangement relationship between an inducer and a fan according to the shape of a hub of the inducer.
7 is a side view showing a connection part between the inducer and the fan.
FIG. 8 is an enlarged view of a portion of FIG. 7.

Hereinafter, specific embodiments of the present invention will be described in detail together with the drawings.

1 is a perspective view of a hair dryer according to an embodiment of the present invention. And, FIG. 2 is a cross-sectional view of portion'A' of FIG. 1. And, Figure 3 is a cross-sectional view showing a connection portion between the inducer and the fan. And, Figure 4 is a perspective view of the inducer. And, Figure 5 is a side view of the inducer.

In general, a hair dryer is a device for drying hair or the like. In addition, in order to shorten the hair drying time, various methods of increasing the air volume of the fan and motor, which are core parts, have been proposed.

First, in order to increase the air volume of the fan and motor, a new shape design of the fan can be considered.

In addition, a method of increasing the rotational speed of the fan and motor and a method of increasing the diameter of the fan can be considered, excluding the design of the new shape of the fan.

However, such a method results in an increase in noise.

In addition, the overall size of the fan and motor is increased, so it does not fit the concept of high air volume, low noise, and small hair dryer.

In the case of the present invention, the size of the fan 210, the motor 220, and the case 100 is kept compact, and the specifications of the fan 210 and the motor 220 are kept the same, while increasing the air volume of the fan. We propose a structure that can be used.

Specifically, a method of increasing the air volume by arranging the inducer 310, which is a structure for discharging by changing the direction of the air introduced in the same or similar to the inlet angle of the blade 212 on the air intake side of the fan 210 Suggest.

At this time, the outlet angle of the inducer 310 is formed to be the same as or similar to the inlet angle of the blade 212, so that external air entering in a straight line parallel to the axial direction of the motor 220 passes through the inducer 310 While, after switching to the same or similar to the entrance angle of the blade 212, it may be introduced into the blade 212.

Since the inducer 310 is installed in front of the fan 210 in which air is sucked, it may be understood as an air inlet guide.

The inducer 310 constitutes a central axis on the same axis as the rotation axis of the fan 210, and the inducer 310 includes a plurality of blades 312 that do not rotate.

Here, the blade 312 of the inducer 310 is such that the exit angle of the rear end of which the air exits is aligned with the entrance angle of the blade 212, but the exit angle of the blade 312 and the entrance angle of the blade 212 The difference of can be designed so as not to deviate from 10˚.

In addition, the blade 312 of the inducer 310 may have a shape in which an intermediate portion connecting the front end and the rear end is connected to a streamlined curved surface so that the flow of air is smoothly bent.

In addition, in order to minimize the gap between the rear end of the blade 312 of the inducer 310 and the tip of the blade 212, the length of the second hub 311 of the inducer 310 is reduced to the blade 312 of the inducer 310. ) By forming to be less protruding than the end, the first hub 211 of the fan 210 may be formed to overlap the blade 312 of the inducer 310 in the radial direction.

In this case, the first hub 211 of the fan 210 may be in a state that further protrudes toward the inducer 310 compared to the blade 212.

1 to 5, a hair dryer according to an embodiment of the present invention includes a case 100, a driving unit 200, and an inducer 300.

First, the case 100 has an inlet 101 through which air is introduced and an outlet 102 through which air is discharged, and a flow path 103 through which air flows is formed, and a handle 104 is provided at the lower side. do.

The case 100 forms an opening 105 in a portion of the handle 104. In addition, the opening 105 may be opened or closed by a separate cover 106. The cover 106 is detachably coupled to the handle 105, and by the coupling of the cover 106, the opening 105 is shielded, and when the cover 106 is separated, the opening 105 is Open.

In addition, when the opening 105 is opened as described above, the driving unit 200 and the inducer 300 may be exposed to the outside.

A grill 107 in which a plurality of inlets 101 is formed may be mounted at the lower end of the handle 104. A plurality of small inlets 101 are formed in the grill 107. Air can be sucked in by the grill 107, while inflow of foreign substances can be prevented.

The handle 104 is a part that is gripped by a user's hand, is formed in a vertical direction, and may have a cylindrical shape.

A main body 108 formed in a horizontal direction is formed on the upper side of the handle 104.

A discharge port 102 is formed in the main body 108.

As described above, the case 100 may have an overall'T' shape or a'A' shape.

The driving unit 200 is disposed in the case 100 and mounted on the inlet 101 side of the case 100, and a plurality of blades around the first hub 211 and the first hub 211 ( A fan 210 forming 212, a motor 220 that is disposed at a rear end of the fan 210 based on the flow of air to provide power so that the fan 210 rotates, and the motor ( It includes a housing 230 for supporting 220.

According to this, when the motor 220 rotates, the fan 210 connected to the rotation shaft 221 of the motor 220 rotates, and a flow of air is generated inside the case 100.

In detail, when the driving unit 200 is operated, external air is introduced into the case 100 through the inlet 101 of the grill 107. Thereafter, the air introduced into the case 100 passes through the fan 210 and the motor 220, flows from the handle 104 to the main body 108, and is discharged to the outside through the discharge port 102. do.

At this time, the air flowing to the main body 108 may be heated while passing through a separate heating unit (not shown), and then discharged to the discharge port 102.

The heating unit (not shown) may selectively heat the air only when there is a warm air command from the user, and may adjust the degree of heating of the air.

In addition, the rotation speed of the motor 220 can also be variously adjusted according to the user's selection of the air volume.

The inducer 310 forms a second hub 311 in the center, forms a plurality of blades 312 around the second hub 311, and is fixed inside the case 100, It is disposed at the front end of the fan 210 based on the flow of the air, and guides the air introduced through the inlet 101 to flow to the fan 210.

Accordingly, when the motor 220 is operated by power supply, the fan 210 rotates, and the air suction force is generated by the rotation of the fan 210.

The air intake direction is formed from one side where the fan 210 is disposed (lower side based on FIG. 2) to the other side where the motor 220 is disposed (upper side based on FIG. 2 ).

Accordingly, external air is introduced into the case 100 through the inlet 101 of the grill 107.

Further, the air introduced into the case 100 may pass through the inducer 310 and then be sucked into the fan 210.

With the configuration of the inducer 310, the suction power of the fan 210 may be increased.

That is, when comparing the case where the inducer 310 is installed and the case where the inducer 310 is not installed, when the inducer 310 is installed, the air volume may be increased.

Wing and blade spacing
(mm) Air volume increase rate
(%) No inducer installed - 0 Inducer installation
(ver. 1) 6 18.28
Inducer installation
(ver. 2) 0.6 25

Table 1 is a table of results of measuring the air volume increase rate according to whether or not an inducer is installed.

In addition, an inducer was installed, and the air volume increase rate according to the distance between the inducer and the blade was measured and compared.

Referring to Table 1, it can be seen that the air volume is increased when the inducer is installed compared to when the inducer is not installed.

In addition, it can be seen that as the distance between the inducer and the blade narrows, the air volume further increases.

That is, as the inducer is installed and the spacing between the blade 312 of the inducer 310 and the blade 212 of the fan 210 is narrower, the air volume increases.

Hereinafter, the'inducer', which is a core component of the present invention, will be described in more detail.

First, while the fan 210 is rotated by the driving of the motor 220, the inducer 310 does not rotate and maintains a fixed state inside the case 100.

That is, the inducer 310 is a fixed body, and functions as an inlet guide that guides the air flowing to the fan 210 while changing the direction of the air flowing to the fan 210 to be the same as or similar to the inlet angle of the fan 210.

In addition, the inducer 310 includes a cylindrical fixing ring 313 fixed to the inner surface of the case, and the second hub 311 is disposed at the center of the fixing ring 313, and the The wing 312 connects the outer surface of the second hub 311 and the inner circumferential surface of the fixing ring 313.

In addition, based on the flow direction of the air, the tip of the fixing ring 313 may protrude further toward the inlet 101 than the tip of the second hub 311 and the blade 312.

That is, based on FIG. 3, the lower end of the fixing ring 313 may protrude further downward than the lower end of the second hub 311 and the wing 312.

In addition, the lower end of the second hub 311 may protrude further downward than the lower end of the wing 312.

6 is a diagram comparing an arrangement relationship between an inducer and a fan according to the shape of a hub of the inducer. And, Figure 7 is a side view showing a connection portion between the inducer and the fan. And, FIG. 8 is an enlarged view of a part of FIG. 7.

6 to 8, the diameter of the second hub 311 is gradually increased based on the flow direction of air, and at least a portion of the second hub 311 may have a curved surface.

That is, the second hub 311 has a cross-sectional area of the other end 311b (see FIG. 6) adjacent to the fan 210 than the cross-sectional area of one end 311a (see FIG. 6) adjacent to the grill 107 It can be formed larger.

Further, the second hub 311 may have a curved surface as a whole to reduce the flow resistance of air.

In addition, while connecting the second hub 311 and the fixing ring 313, the wing 312 that guides the flow of air flowing between the second hub 311 and the fixing ring 313 is at least partially curved It can be formed as

In detail, the blade 312 is formed in parallel with the rotation axis direction of the fan 210, and the introduction part 312a through which air is introduced (refer to FIG. 7), and the inlet angle of the blade 212 of the fan 210 (β, see FIG. 8) and forming the same or similar outlet angle (α, see FIG. 8), a discharge portion 312c through which the air introduced into the introduction portion 312a is discharged (see FIG. 7), and the introduction portion ( 312a) and the discharge part 312c may be connected, and a connection part 312b formed of a curved surface may be included.

For example, the inlet angle (β, see FIG. 8) of the blade 212 of the fan 210 and the outlet angle (α, see FIG. 8) of the discharge portion 312c of the blade 312 may be formed equally. I can.

As another example, the inlet angle (β, see FIG. 8) of the blade 212 of the fan 210 and the outlet angle (α, see FIG. 8) of the discharge portion 312c of the blade 312 are ±10° or less In the range of, differences may occur.

Blade entrance angle and
Inducer exit angle difference Blade and blade gap
(mm) Air volume increase rate
(%) Static pressure efficiency
(%) 0 0.6 25 24.49 5˚ 0.6 23.48 17.98

Referring to Table 2, the inlet angle of the blade 212 of the fan 210 (β, see FIG. 8) and the outlet angle of the discharge portion 312c of the blade 312 (α, see FIG. 8) are the same. In other words, when the difference between the inlet angle of the blade 212 of the fan 210 (β, see FIG. 8) and the outlet angle of the discharge portion 312c of the blade 312 (α, see FIG. 8) is 0 , Compared to the case where the difference between the inlet angle of the blade 212 of the fan 210 (β, see FIG. 8) and the outlet angle of the discharge portion 312c of the blade 312 (α, see FIG. 8) is 5° , It can be seen that the air volume increase rate is also increased, and the static pressure efficiency between the duct entry and exit section is also increased.

In addition, in the case of the present invention, a structure for narrowing the spacing between the blades 312 of the inducer 310 and the blades 212 of the fan 210 is proposed.

6 to 7, the inducer 310 has a concave rear end facing the fan 210 to form a cavity 314 (see FIG. 6 ).

In this case, the rear end of the wing 312 (right as shown in FIG. 6) protrudes further in the direction of the fan 210 (rightward as in FIG. 6) than the rear end of the second hub 311 (right as shown in FIG. 6). .

Therefore, as shown in Fig. 5, when the inducer 310 is erected so that the fixing ring 313 is located on the bottom surface, the height difference (Δh) between the wing 312 and the second hub 311 Occurs.

In addition, based on the axial direction of the fan 210, the length of the second hub 311 may be shorter than the length of the blade 312.

In addition, based on the axial direction of the fan 210, the length of the second hub 311 may be formed equal to the length of the blade 312, or may be formed to be longer.

In addition, at least a portion of the first hub 211 of the fan 210 may be accommodated in the cavity 314 of the inducer 310.

In detail, the first hub 211 of the fan 210 is formed such that one side facing the inducer 310 (left as referenced in FIG. 6) protrudes more than the blade 212.

In addition, the front end 211a of the first hub 211 of the fan 210 protruding from the blade 212 as described above is accommodated in the cavity 314.

6(a) is a view showing an arrangement relationship between the inducer 310' and the fan when the cavity is not formed in the inducer 310', and FIG. 6(b) is a view showing the arrangement of the inducer 310'. When the cavity 314 is formed, it is a diagram showing an arrangement relationship between the inducer and the fan.

In the case of (a) of FIG. 6, the rear end of the second hub 311 ′ of the inducer 310 ′ (on the right of FIG. 6) and the rear end of the wing 312 ′ (right of FIG. 6) are on a straight line. It can be confirmed that it is located. Accordingly, a cavity cannot be formed in the inducer 310 ′, and the first hub 211 of the fan 210 cannot be accommodated inside the inducer 310 ′.

On the other hand, in the case of FIG. 6 (b), it was confirmed that the rear end of the second hub 311 of the inducer 310 (right side of FIG. 6) is formed to be concave than the rear end of the wing 312 (right side of FIG. 6). I can. Accordingly, a cavity 314 may be formed in the inducer 310, and a part of the first hub 211 of the fan 210 may be accommodated in the cavity 314 of the inducer 310.

Comparing the drawings, in the case of (b) of FIG. 6 in which the cavity 314 is formed in the inducer 310, the distance between the blade 312 of the inducer 310 and the blade 212 of the fan 210 is It is possible to identify the narrowing.

At this time, the distance between the blade 212 of the fan 210 and the blade 312 of the inducer 310 may be maintained in a range of 1 mm or less.

Further, the first hub 211 of the fan 210 and the second hub 311 of the inducer 310 may have planes facing each other.

In addition, the case 100 may include a first body extending in a first direction, and a second body extending in a vertical direction with the first body and coupled to an end of the first body.

In addition, the inlet portion 101 may be formed at an end of the first body, and the discharge portion 102 may be formed at an end of the second body.

Here, the first body may mean a portion in which the handle 104 is formed, and the second body may mean the body 108.

In addition, the driving unit 200 and the inducer 310 may be disposed in the first body and coaxially with the first body.

In addition, a plurality of diffuser vanes 230 through which air discharged from the fan 210 passes may be formed between the motor 220 and the inner circumferential surface of the case 100.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments.

The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (17)

A case having an inlet through which air is introduced and a discharge port through which air is discharged, forming a flow path through which air flows, and having a handle at the lower side;
A fan disposed in the case and mounted on the inlet side of the case, and forming a plurality of blades around the first hub and the first hub, and the fan disposed at the rear end of the fan based on the flow of air A drive unit including a motor providing power to rotate and a housing supporting the motor; And
A second hub is formed in the center, a plurality of wings are formed around the second hub, fixed inside the case, and disposed at the front end of the fan based on the flow of air, through the inlet. Hair dryer comprising an inducer for guiding the introduced air to flow to the fan.
The method of claim 1,
While the fan is rotated by the driving of the motor, the inducer does not rotate and maintains a fixed state inside the case.
The method of claim 2,
The inducer includes a cylindrical fixing ring fixed to an inner surface of the case, the second hub is disposed at the center of the fixing ring, and the blade is an outer surface of the second hub and an inner peripheral surface of the fixing ring Hair dryer to connect,
The method of claim 3,
The second hub is a hair dryer whose diameter is gradually increased based on the flow direction of air, and at least a part of the hair dryer has a curved surface.
The method of claim 3,
The blades are at least partially curved hair dryer,
The method of claim 5,
The wings,
An introduction part formed in parallel with the direction of the rotation axis of the fan and into which air is introduced;
A discharge part forming an outlet angle equal to or similar to an inlet angle of the blade of the fan, and through which air introduced into the introduction part is discharged;
A hair dryer that connects the introduction part and the discharge part, and includes a connection part formed of a curved surface.
The method of claim 6,
The difference between the inlet angle of the blade of the fan and the outlet angle of the discharge portion of the blade is 10 degrees or less.
The method of claim 3,
Based on the flow direction of the air,
A hair dryer protruding further toward the inlet than a tip of the second hub and the blade.
The method of claim 1,
The inducer is a hair dryer having a concave rear end facing the fan to form a cavity.
The method of claim 9,
The rear end of the blade is more protruding toward the fan than the rear end of the second hub.
The method of claim 10,
Based on the axial direction of the fan, the length of the second hub is formed to be shorter than the length of the blade.
The method of claim 9,
The first hub of the fan, at least a portion of the hair dryer is accommodated in the cavity of the inducer.
The method of claim 12,
A hair dryer that maintains a spacing of 1 mm or less between the blades of the fan and the blades of the inducer.
The method of claim 12,
The first hub of the fan and the second hub of the inducer have a flat surface facing each other.
The method of claim 1,
The case includes a first body extending in a first direction, and a second body extending in a vertical direction with the first body, and coupled to an end of the first body,
The inlet part is formed at an end of the first body, and the discharge part is formed at an end of the second body.
The method of claim 15,
The driving unit and the inducer are hair dryers disposed in the first body and coaxially with the first body.
The method of claim 1,
A hair dryer having a plurality of diffuser vanes formed between the motor and the inner circumferential surface of the case through which the air discharged from the fan passes.

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