JP2749885B2 - Blower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower, and more particularly to a blower provided in a hair dryer or a hair curling device.

[Prior art]

As shown in FIG. 6, a suction port 53 is provided at a rear end of a cylindrical main body housing 50 as a blower for a hair curl device or a hair dryer.
Among them, there is one in which an axial fan-type fan F driven by a motor M is installed.

[Problems to be solved by the invention]

This blower has the following problems. That is, when the fan F is driven by the motor M, the wind flow W ₁ entering from the suction port 53 and flowing in the housing 50 in the axial direction is changed by the resistance of the wind flow interposed between the fan F and the discharge port. , back along the inner surface of the housing 50 is the flow W ₂ opposite the range shown partially on the surface of the fan F not able to maintain the parallel state of the axis is stalled in the X . Then, the _two flows W ₁ and W ₂ collide with each other to generate a vortex W _3. As a result, a loss of wind pressure and air volume occurs, and turbulent noise is generated. Further, if the rotation speed of the motor M is increased to obtain the required performance by covering the loss of the wind pressure and the air volume, the motor noise increases, so that the noise further increases. Hair dryers and hair curls, especially hair curls that are used with the hair wrapped around the hair wrap,
The generation of noise at the ear is very problematic. The present invention has been made in view of such a point, and an object of the present invention is to provide a blower that can reduce noise without reducing wind pressure and air volume.

[Means for Solving the Problems]

Thus, the present invention provides a blower including a suction port formed at one end side of a cylindrical housing and a fan installed in the cylindrical housing and driven to rotate by a motor. And a bell mouth whose inner diameter on the fan side is narrower than the inner diameter on the suction port side, and is located between the outer peripheral surface of the bell mouth and the inner surface of the housing with air gaps formed therebetween. With the cylindrical body, the cylindrical body formed integrally with the bell mouth divides the space between the outer peripheral surface of the bell mouth and the inner surface of the housing into a space on the inner peripheral side and a space on the outer peripheral side. The bell mouth is characterized in that the two spaces connected to each other on the outer periphery of the large diameter side of the bell mouth are open toward the fan side. [Function] According to the present invention, the bell mouth and the cylindrical body control the flow of the wind, so that the wind flows do not collide with each other to generate a vortex. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on illustrated embodiments. The illustrated example is a hair curling device provided with a blower and a steam generator, and the hair curling device includes a changeover switch.
A main body A provided with S ₁ and S ₂ and also serving as a grip from which the power cord 90 is drawn out; an attachment base B detachably connected to a tip end of the main body A;
The attachment C is configured to be detachable from the outer periphery of the pipe 11 of the attachment base B. And the blower is
It is installed in the main body A. The main body A accommodates a blower including a motor M and a fan F driven by the motor M in a rear portion of the cylindrical housing 50 on the side from which the power cord 90 is pulled out, and arranges a heater block H in a front portion of the housing 50. At the front end of the housing 50, a small-diameter cylindrical portion 51 having a connection jack 54 is provided.
The small-diameter cylindrical portion 51 has an opening at the tip end surface of the small-diameter cylindrical portion 51. The blower discharges air taken in from a suction port 53 formed at the rear end of the main body A from the blower port 52. When the heater block H is energized, hot air is discharged from the air outlet 52. In the figure
56 is the inlet cover attached to the inlet, 57 is the power cord
A rotating connector 90 is connected, R ₁ and R ₂ are voltage dividing resistors, D _{3 in} the figure is a light emitting diode indicating that the steam generator is operating, and TH is a thermoswitch. Also, the suction port cover 56 formed in a dome shape
Is mounted on the rear end of the housing 50 in a bayonet manner. A projection 58 is provided so as to project from the outer peripheral surface on the connection portion side with the housing 50, and this projection 58 When the suction port cover 56 is rotated with respect to the housing 50 so that the projection 58 and the mark 59b are aligned, the housing 50 and the suction port cover are attached to and detached from the housing 50 when aligned with the mark 59a provided on the housing 50. The suction port cover 56 is fixed, and when the suction port cover 56 is attached to the housing 50, the projection 58 is made to protrude from the outer peripheral surface of the housing 50. A nail or the like can be hooked on the projection 58 at the time of attachment / detachment, which facilitates attachment / detachment. The attachment base B includes a base 10 detachably connected to the small-diameter cylindrical portion 51 of the main body A, and a cylindrical pipe 11 having one end supported by the base 10.
The heating device 3 is mounted in 11. The base 10 has a shape in which a large-diameter cylindrical portion 10a and a small-diameter cylindrical portion 10b are connected to each other by a rib 10c while being spaced apart in the axial direction, and a plug receiving portion is provided in the large-diameter cylindrical portion 10a. An engagement protrusion 17 is attached to the small-diameter cylindrical portion 10b so as to protrude outward by a spring 18. The pipe 11 has a cylindrical shape, the rear end of which is fixed to a small-diameter cylindrical portion 10b with screws, is formed of a good heat conductor, and has a number of steam holes 14 for ejecting steam, A concave groove 15 is provided on the outer peripheral surface over the entire length in the axial direction. The outer peripheral surface of the pipe 11 is subjected to electrodeposited flocking 16, a so-called flocky treatment, over the entire surface.
The concave groove 15 is formed such that only one or a plurality of concave grooves are asymmetric with respect to the pipe 11 having a circular cross section. The steam generator includes a heating device 3 disposed in the cylindrical pipe 11 and a liquid (water)
And a liquid supply means 4 for supplying the liquid, and the heating device 3 for heating the liquid supplied to the surface to produce steam is provided by:
It is composed of a holder 30 made of a good heat conductor and a wedge-shaped heater 33 housed in the holder 30, housed in the cylindrical pipe 11 as described above, and
The plug 72 supported by the plug receiver 13 is connected via the. The attachment base B has a large-diameter cylindrical portion.
The main body A is connected to the main body A by covering the small-diameter cylindrical portion 51 of the main body A. At this time, the plug 72 is connected to the connection jack 54, and the hook 55 provided on the main body A is engaged with the inner surface of the base 10. Engagement with the recess is prevented. The roll brush type attachment C attached to the attachment base B has a cylindrical base 20 having a plurality of steam holes 21 formed therein, and a bristle 22 projecting from the outer peripheral surface of the base 20. The detachable button 23 is slidably attached to the base side in a direction perpendicular to the axis. Attachment C is a pipe of attachment base B
When the outer peripheral surface of the pipe 11 is covered with a ridge (not shown) that matches the concave groove 15 formed on the outer peripheral surface of the pipe 11, the detent and the circumferential positioning of the pipe 11 can be prevented. As a result, the steam hole 14 formed in the pipe 11 and the steam hole 21 of the attachment C coincide with each other. And
Attachment base B to the hole where detachable button 23 is
The attachment C is fixed to the attachment base B by the engagement of the engagement projections 17 provided on the attachment base 17. Liquid supply means 4 for supplying a liquid to the heating device 3 includes:
Tank cases 40 and 41 welded to each other, and a cylindrical tube portion detachably attached to an opening in the tank case 41.
42, and a water absorbing body 44 disposed in the cylindrical portion 42. The tank case 40 is provided with a valve 43 for adjusting the internal pressure. One end of the tank case 4 is inserted into the inner surface of a V-shaped notch formed on the distal end surface of the cylindrical portion 22 inserted into the opening.
The other end of the water-absorbing body 44 located in the position 0,41 is located. Now, if the attachment C is mounted on the attachment base B and the blower is operated while the attachment base B is connected to the main body A, the wind will flow into the large-diameter cylindrical portion 10a of the attachment base B and the small diameter. Is discharged from between the cylindrical portion 10b. If the heater 33 in the heating device 3 is energized in a state where the liquid supply means 4 filled with water is attached, the water absorbing member 44 is in contact with both the inclined side surfaces of the holder 30 in the heating device 3. The water retained in 44 becomes steam by being heated, and squirts from the steam holes 14 and 21. When the hair is to be curled, the hair is wound around the attachment C, and then the heater 33 of the heating device 3 is energized to generate steam, so that the hair is moistened and heated. After performing this for several seconds, the hair is dried by blowing for several seconds by operating the blowing device while continuing to generate steam. Since the humidification of the hair is performed using a heat having a calorific value of steam, the time required for drying the hair by blowing air is shortened. By the way, the fan F of the blowing device in this hair curling device
Is disposed closer to the suction port 53 than the motor M. A bell mouth is provided between the fan F and the suction port 53.
81 and a cylindrical body 82 are provided. The bell mouth 81 has a large inner diameter on the suction port 53 side, and the fan F
The inner diameter at the side is smaller than the diameter of the fan F, and the cylindrical body 82 is arranged on the outer periphery of a portion of the bell mouth 81 on the fan F side. As is apparent from FIG. 3, the cylindrical body 82 is formed integrally with the bell mouth 81, and is formed by a plurality of ribs 83 projecting radially from the outer peripheral surface of the bell mouth 81. It is held at a position keeping a required gap from the outer peripheral surface. Further, the ribs 83 are configured to protrude further outward than the cylindrical body 82,
The bell mouth 81 and the cylindrical body 82 are positioned and fixed with respect to the housing 50 by being in contact with the inner surface of the housing 50 together with the large-diameter side peripheral edge of the bell mouth 81 when disposed inside the housing 50. Here, the cylindrical body 82 is located in a state where a gap is formed between the outer peripheral surface of the bell mouth 81 and the inner surface of the housing 80, and the outer peripheral surface of the bell mouth 81 and the housing 80 are formed. both space K _1, K ₂ are connected to each other in the large diameter side of the have been divided into a space K ₁ of the inner peripheral side space K ₂ and the outer peripheral side of the space and the bell mouth 81 between the inner surface,
It is open toward the fan F side. Now, a flow of air toward the discharge port 52 via the fan F from the suction port 53 by the operation of the fan F and W _1, for resistance material between the fan F and the discharge port 52, the parallel state of the axis The outer periphery of the fan F and the housing 50 cannot be maintained.
When a portion of the wind flow will flow in opposite directions circle portion between the inner surface and W _2, flow W ₂ is a cylindrical body 82 the outer peripheral surface and the housing
Through the space K ₁ between the 50 inner surface, folded along the outer peripheral surface the cylindrical member 82 the inner circumferential surface of the large diameter side of the bell mouth 81 and the bell mouth
81 are those directed to the back fan F and the flow W ₁ space K ₂ flows in the same direction between the outer peripheral surface, without the W ₂ flows flows W ₁ collides, wind pressure since this And a vortex that causes a reduction in air volume or generation of turbulent noise is eliminated. Also, as much as the ventilation loss is reduced and the ventilation efficiency rises,
Even if the rotation speed of the motor M is reduced, the required performance can be obtained. Therefore, the motor rotation which is the largest factor of the noise can be reduced by lowering the rotation speed of the motor M. The level can be considerably reduced. In the hair curl device as shown in the illustrated example, since the blower is operated with the hair wound around the attachment C, noise is generated at the ear, so it is desirable that the noise be as low as possible. , So that this can be satisfied. In order to suppress the generation of noise, the flow of the wind W ₂ in the spaces K ₁ and K ₂ as described above is delicate due to the positional relationship between the bell mouth 81 and the cylindrical body 82. However, as described above, since the bell mouth 81 and the cylinder 82 are integrally formed, it is certain that the positional relationship between the bell mouth 81 and the cylinder 82 is set to the set value. Therefore, it is possible to prevent the effect of reducing the noise level from being lost due to the misalignment between the two when the two are incorporated into the housing 50.

【The invention's effect】

As described above, in the present invention, the bellmouth and the cylindrical body suppress the generation of vortices due to the collision of the opposing air flows, so that noise can be reduced and the blowing efficiency can be improved, and the bellmouth can be obtained. Since the and the cylindrical body are formed integrally, the positional relationship between the two does not shift when assembled into the housing, and therefore, a reduction in noise and an improvement in blowing efficiency can always be reliably obtained. In addition, since the number of rotations of the motor can be reduced from the improvement of the blowing efficiency, the noise can be further reduced.

[Brief description of the drawings]

1 is an exploded sectional view of one embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a perspective view of a bell mouth and a cylindrical body of the same, and FIG. , FIG. 5 (a)
(B) is a partial plan view and a partial side view of the same, and FIG. 6 is a sectional view of a conventional example, where F is a fan, M is a motor, 50 is a housing, 53 is an intake port, 81 is a bell mouth, 82 Indicates a cylinder.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-5791 (JP, A) JP-B-41-13227 (JP, B1) Jiko-35-32077 (JP, Y1) J-Jo50- 20326 (JP, Y1) Patent 2564889 (JP, B2) Patent 2573211 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) A45D 20/10-20/12

Claims (1)

(57) [Claims] An air blower comprising a suction port formed at one end of a cylindrical housing and a fan installed in the cylindrical housing and driven to rotate by a motor, wherein a fan is provided between the fan and the suction port. A bell mouth whose inner diameter on the fan side is narrower than the inner diameter on the suction port side, and a cylinder positioned between the outer peripheral surface of the bell mouth and the inner surface of the housing with a gap formed therebetween. Body, the cylindrical body formed integrally with the bell mouth, the space between the outer peripheral surface of the bell mouth and the inner surface of the housing is divided into an inner peripheral space and an outer peripheral space. A blower in which the two spaces connected to each other on the outer periphery of the bell mouth on the large diameter side are open toward the fan side.