JPH0382402A - Dryer - Google Patents

Abstract

PURPOSE:To secure a requisite amount of wind even through a case as a gripping part, i.e., the outside dia. of a rotor blade, is dimensioned small, and also reduce noise by installing two sets of rotor blades in parallel arrangement in the axial direction of the case to constitute a dryer, in which the two rotor blades rotate oppositely to each other, and therein arranging a baffle blade between the two blades. CONSTITUTION:A baffle blade 9 is installed between two rotor blades 4, 5, and long, thin plates provided with notches at certain intervals are formed in meshing with each other in lattice form. A vane 4b generates wind W1 accompanied with swirling inclined to the axis. Eventual turbulence of the wind W1 is baffled with the mentioned baffle blade 9. A rear stage vane 5b rotating reversely upon receiving the baffled wind W1 offsets the foremost inclination by its mount angle theta, and as a result sends wind W2 approx. in parallel with the axis. The wind quantity with this dryer is 1.5 thru 2.0 times as large as that due to arrangement with a single rotor blade because of equipment of two rotor blades parallelly, wherein noise is suppressed to approx. equal to the case with one rotor blade, and lower than an arrangement with two rotor blades having no baffle blade.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dryer that is used for drying hair and the like, and which sends air in the axial direction of the rotor blades.

[Conventional technology]

In recent years, home appliances have become smaller, and even for hair dryers, especially those that have a long cylindrical case that blows air in the axial direction, the outer diameter of the case that serves as the grip has been made smaller.
Moreover, there is a demand for a device with a large air volume and low noise.

The inventors of the present application have been conducting intensive research on increasing the air volume and reducing the noise of this type of dryer, and have proposed their results in, for example, Japanese Patent Application No. 63-154495 and Japanese Patent Application No. 63-287367. ing. The former type has a concentric thin cylindrical member attached to the case, and the latter type has a contrived shape to the member located in the air passage.

Incidentally, the air volume is proportional to the cube of the outer diameter of the rotor blade. Therefore, when reducing the outer diameter of the rotor blades to make the dryer smaller, a reduction in air volume is unavoidable.Therefore, in order to compensate for the reduction in air volume while reducing the outer diameter of the rotor blades, the rotor blades are attached to the axis of the case. Japanese Patent Application No. 1-40110 proposed a system in which two sets of rotor blades are arranged in parallel along the direction and both rotor blades rotate in opposite directions.

[Problem to be solved by the invention]

The above-mentioned patent application No. 1-40110 compensated for the reduction in air volume by reducing the outer diameter of the rotor blades, but
This also brought about the problem of a slight increase in noise.

The present invention was made in view of the above circumstances, and its purpose is to secure the required air volume even if the outer diameter of the case that serves as the grip portion, that is, the rotor blade, is made small.
To provide a dryer that can also reduce noise.

[Means to solve the problem]

The dryer of the present invention has rotor blades, a heater, etc. rotated by a motor along the axial direction of the cylindrical case with an inlet at one end and an outlet at the other end. Two sets of rotor blades are arranged in parallel along the axial direction of the case,
This is a dryer in which both rotor blades rotate in opposite directions to each other, and a rectifying blade is disposed between the front rotor blades.

Note that the blade installation angles of both rotor blades have opposite inclinations.

[Operation] First, the moving blades at the front stage in the direction in which the wind is sent generate wind accompanied by swirling. The overall flow direction of this wind is tilted at a certain angle with respect to the axis, depending on the mounting angle of the rotor blades.

The flow of this wind is then facilitated by counter-rotating rotor blades in the latter stage. In this case, since the inclination of the mounting angle of the blade is opposite to that of the previous stage, the inclination of the overall flow direction of the wind is canceled out, and the overall flow direction of the wind becomes approximately parallel to the axis.

In addition, when observed in detail, when there are no straightening blades between the front rotor blades, the wind between the front rotor blades becomes slightly turbulent, which slightly increases the noise. This rectifies the wind flow and suppresses the increase in noise.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 3.

Reference numeral 1 denotes a plastic case having a substantially cylindrical shape, with one end serving as an inlet port 1a and the other end serving as an outlet port 1b.

Inside the case, two sets of motors 2 and 3 are installed along the axial direction.
Moving blades 4 and 5 rotated by the motors 2 and 3, a heater 6, a circuit section 7 for controlling electrical components, and the like are arranged side by side. 8 is a mounting plate to which the heater 6 and the circuit section 7 are attached.

One set of motor 2 and rotor blades 4 in the front stage has the motor 2 located at the suction port 1a, and the rotor blade 4 is attached to the rotating shaft 2a, and one set of motor 3 and rotor blades 5 in the rear stage has the motor 3 located at the suction port 1a and the rotor blade 4 is located at the rotation shaft 2a. Mouth 1b
The moving blades 5 are respectively fixed to the rotating shafts 3a. Therefore, both rotor blades 4.5 face each other, with a gap of about 15 mm between them.

Both motors 2.3 are 16.000 to 20.0O, for example.
An Orp brushless motor is used, and is supported by a rib IC that is continuous from the inner peripheral wall of the case 1. Further, both motors 2 and 3 are designed to rotate in opposite directions.

Both rotor blades 4.5 are connected to the central base 4 by plastic material.
From a, 5a, there are a plurality of blades 4b, 4b, 4b, 4b, .
- are integrally formed in the shape of extending at equal intervals.

Also, the blades 4b, 4b, -, 5b, 5b of both moving blades 4.5,
... are substantially the same, but their inclinations are opposite to each other. Fig. 2 shows only the blade located in the front, and the mounting angle θ of this blade is the angle between the blade surface and a line perpendicular to the rotating shafts 2a and 3a when viewed from the side. Set in the range of 20 to 45 degrees. This mounting angle θ is the same for the other blades.

Reference numeral 9 denotes a rectifying blade, which is arranged between both rotor blades 4.5.

The flow straightening blades 9 are formed, for example, by meshing thin long plates having a width of about 5 mm and having notches at predetermined intervals in a lattice shape. Therefore, the distance between the rectifying blade 9 and each rotor blade 4.5 is approximately 5II11. Further, the porosity of the rectifier blades 9 is set to about 90% or more in order to prevent the airflow from becoming a problem as resistance to the wind flow. Incidentally, if the plate surface of the thin long plate is tilted in accordance with the angle of the wind tilted with respect to the axis by the rotor blade 4 of the preceding stage, wind resistance will be less likely to occur.

In such a dryer, for example, if we look at the front blade 4b in the second diagram, this blade m4b generates a wind H1 with a swirl tilted with respect to the axis. The turbulence of the airflow is adjusted by the straightening blades 9. The rear blade 5b, which rotates in the opposite direction and receives the rectified air volume, cancels out the previous inclination by its mounting angle θ, and ends up sending the wind W2 substantially parallel to the axis.

This dryer has two moving blades installed side by side,
The air volume is 1.5 to 2.0 times higher than that with one rotor blade, and the noise is suppressed between the roads and the like when there is one rotor blade, and the noise is suppressed in the case of one rotor blade and between the roads. Noise can be reduced compared to those with individual rotor blades.

〔Effect of the invention〕

Since the dryer of the present invention is constructed as described above, when there is no straightening blade between the front rotor blades, the wind between the front rotor blades is slightly turbulent.
This causes a slight increase in noise, but by arranging a rectifying blade between the front rotor blades, the wind flow is rectified and the increase in noise can be suppressed. Even if it is made small, it is possible to ensure the required air volume and reduce noise.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the present invention, in which a partially cut side view is shown, FIG. 2 is an explanatory diagram of wind flow, and FIG. 3 is a plan view of a rotor blade. 1--Case, 2--Previous stage motor, 4--Previous rotor blade, 6--Heater, 9--Blending blade. 3--Late stage motor, 5--Late stage rotor blade,

Claims (1)

[Claims] (1) A rotor blade, a heater, etc., which are rotated by a motor along the axial direction, are installed in a cylindrical case with an inlet at one end and an outlet at the other end. A dryer characterized in that two sets of rotor blades are arranged in parallel along the axial direction of a case, and both rotor blades rotate in opposite directions, and a rectifying blade is disposed between the re-rotor blades.