JP3041997B2 - Multilayer disk fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer disk fan which can be easily manufactured using a paper or a fibrous material which can be impregnated with a deodorant or a drying agent.

[0002]

2. Description of the Related Art Conventionally, as a form of a warm air fan which can be used in a local cleaning device or a hand drying device, a multilayer disk fan X shown in FIGS. 7 and 8 and a multilayer disk fan Y shown in FIG.
There is.

In such a multilayer disk fan X, a fan blade 101 driven by an electric motor 100 is disposed substantially at one end of a fan casing 110, and a heater 102 is disposed downstream of the fan casing 110. It is constituted by arranging.

The fan blade 101 is rotated by driving the electric motor 100 to generate an air flow, and the air flow is heated by a heater 102 to send out hot air from a hot air outlet 103 so that the human body The required parts can be effectively dried.

Further, since the fan blade 101 is formed by laminating a large number of circular disks 104 at predetermined intervals by the spacers 105, the fan blade 101 utilizes the air resistance generated on the surface of the circular disks 104 to remove air. The flow can be generated, and the operation of the fan can be performed quietly.

On the other hand, as shown in FIG. 9, a multilayer disk fan Y is formed by resin molding or the like to improve the assemblability.
105 is formed integrally with the annular disk 104.

[0007]

However, such a multilayer disk fan X still has the following problems to be solved.

In other words, in order to reduce the weight and size of a warm air fan or the like, it is conceivable to manufacture a multilayer disk fan using paper, a fibrous material, or a thin plate having a low specific gravity. In particular, when the multilayer disc fan is made of paper or fibrous material, the annular disc constituting the multilayer disc fan is impregnated with a desiccant or a deodorant, so that the installation space for the desiccant or the deodorant is reduced. It can be unnecessary.

However, it is difficult to assemble a multi-layer disc fan by using a paper, a fibrous material, or a thin board and interposing a number of spacers 105 as in the above-described conventional assembling method. It is extremely difficult because there is no waist
It is not suitable for mass production, and the number of parts increases, resulting in high production costs.

An object of the present invention is to provide a multi-layer disk fan that can solve the above-mentioned problems.

[0011]

SUMMARY OF THE INVENTION According to the present invention, a plurality of circular disks forming a fan blade by laminating them at a certain interval from each other extend to the inner peripheral edge, respectively, toward the outer peripheral edge. A plurality of notches are formed, and a receiving notch is formed at an outer edge of a vertically long plate-like spacer having a height substantially equal to that of the fan blade, corresponding to a position of the notch of the annular disk. The present invention relates to a multi-layered disk fan which is formed so that the notch portion and the receiving notch are engaged with each other so that the annular disk is held at a constant interval by a vertically long plate-like spacer.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a multilayer disk fan according to the present invention.

FIGS. 1 and 2 show a case where the multilayer disk fan A is used as a hot air fan.

As shown in the figure, the fan casing 13 of the multi-layer disk fan A has a substantially circular front wall 10 and a rear wall 11 with the peripheral edges thereof being cut apart from the annular peripheral wall 12 except for a lower end opening (warm air outlet) 40.
Are formed by connecting with each other.

In this embodiment, the fan casing 13 is fixed to a wall 15 via a support frame 14.

The fan casing 13 has an air intake port 10a in the front wall 10 and a fan blade 20 concentrically disposed inside the air intake port 10a.
Is the output shaft of the drive motor 21 disposed in the support frame 14.
It is connected to 22 by a nut 22a or the like.

A heater 39 made of a nichrome wire or the like is provided below the fan casing 13.

In the above basic configuration, the present invention provides a lightweight
It is characterized by the configuration of the fan blade 20 that can be reduced in size and mass-produced and that can operate quietly.

That is, as shown in FIGS. 1 and 6, the fan blade 20 substantially comprises a number of thin circular disks 24 at a predetermined distance between the upper substrate 20a and the lower substrate 20b. It is formed by stacking four vertically long and arcuate spacers 25 in the opened state.

As shown in FIGS. 1, 3 and 4, the annular disk 24 is directed toward the inner peripheral edge 24b of a donut-shaped disk portion 24c having an air inlet 24a at the center and toward the outer peripheral edge. To form a plurality of arc-shaped notches 24d extending radially.

On the other hand, as shown in FIG. 4, an upper substrate 20a and a lower substrate
20b is a fan blade, as described below.
When the annular disk 24 and the spacer 25 are fitted together to assemble 20, the arc-shaped spacer engagement for engaging the arc-shaped locking pieces 25b and 25c provided on the upper edge and the lower edge of the spacer 25. Grooves 20c and 20d are provided.

As shown in FIGS. 1 and 5, the vertically elongated spacer 25 has an arc-shaped receiving notch 25a on its outer side edge, which is fitted with the arc-shaped notch 24d of the annular disk 24. All of them have the same radius of curvature, and arc-shaped locking pieces 25b, 25c are integrally formed on the upper and lower edges thereof. In the above configuration, the arc-shaped notch 24d of the annular disk 24 and the upper and lower substrates 20a, 20
The arc-shaped spacer engaging grooves 20c and 20d provided in b, the receiving notch 25a provided in the spacer 25, and the locking pieces 25b and 25c have the same radius of curvature.

The annular disk 24 is preferably made of paper or fibrous material so as to impregnate a desiccant or deodorant for weight reduction. Note that a thin plate made of another material may be used.

Next, the fan blade 20 having the above configuration
Will be described with reference to FIGS. 1 and 6.

First, a number of annular disks 24 are arranged in a stacked state at intervals, and the cut-out portions of all the annular disks 24 are formed.
Make 24d consistent. Next, a vertically elongated spacer 25 is fitted into the notch 24a of each annular disk 24, and the receiving notch 25a of the spacer 25 and the notch 24
d and a large number of annular disks 24 and spacers 25
And are integrated.

At this time, even when the environmental disk 24 is made of paper, a fibrous material, or another thin plate, the receiving notch 25a of the spacer 25 and the notch 24d of the annular disk 24 are engaged with each other. A narrow gap for air outflow can be reliably and easily formed between the annular disks 24, 24.

Thereafter, the upper and lower substrates 20a, 20b are snapped on the upper and lower surfaces of the assembly of the annular disk 24 and the spacer 25 using the locking pieces 25b, 25c provided at the upper and lower ends of the spacer 25. The fan blade 20 is formed by fitting.

Thereafter, the lower substrate 20b of the fan blade 20
Is connected to the output shaft 22 of the drive motor 21 by a nut 22a.

Therefore, the fan blade 20 can use a large number of annular disks 24 to significantly increase the air volume, and can be made compact and lightweight by forming the annular disks 24 from paper or the like.

Further, when the annular disk 24 is made of paper or the like,
Since the deodorant and the desiccant can be impregnated, the installation place of the deodorant and the desiccant can be made unnecessary, and the structure of the warm air fan and the like can be simplified.

Hereinafter, the operation of the multilayer disk fan A having the above configuration will be described with reference to FIGS.

First, when the user presses an operation switch (not shown), the drive motor 21 and the heater 39 operate.

When the fan blade motor 20 is driven by the fan drive motor 21, the fan blade 20 is rotated, air is sucked into the fan casing 10 from the outside through the air intake 10 a, and the air is supplied to the multi-layer disk 24 forming the fan blade 20. , 24 through the gap between the inlet side and the back side with a substantially equal air volume distribution, then generate a downward air flow, after heating with the heater 39, blow out warm air from the warm air outlet 40 to the outside, Dry your hands.

In the rotation of the fan blade 20, the gap between the annular disks 24, 24 can be made as small as possible, so that the air volume can be significantly increased while keeping the fan blade 20 in a compact shape. At the same time, occurrence of turbulence at the entrance and exit of the annular disk 24 can be prevented as much as possible, and noise caused by turbulence can be reduced.

[0035]

According to the present invention, a plurality of notches extending toward the outer peripheral edge are respectively provided on the inner peripheral edges of a number of annular disks forming a fan blade by laminating the fan blades at a predetermined interval. A receiving notch corresponding to the position of the notch of the annular disk, at the outer edge of the vertically long plate-like spacer having the same height as the fan blade. Since the annular disk is held at a constant interval by a vertically long plate-shaped spacer by making the notch and the receiving notch mesh with each other, the fan blade uses a large number of annular disks to significantly reduce the air volume. By making the annular disk 24 from paper or the like, the multilayer fan structure can be made compact and lightweight.

Further, when the circular disk is made of paper or the like, since a deodorant or a desiccant can be impregnated, a place for installing the deodorant or the desiccant can be made unnecessary, and a hot air fan or the like can be used. The structure can be simplified.

[Brief description of the drawings]

FIG. 1 is a cross-sectional front view when a multilayer disk fan according to the present invention is used as a hot air fan.

FIG. 2 is a cross-sectional view taken along line II of FIG.

FIG. 3 is a sectional view taken along line II-II of FIG.

FIG. 4 is a perspective view of an annular disk in a stacked state.

FIG. 5 is a perspective view of a spacer.

FIG. 6 is a perspective view of a fan blade.

FIG. 7 is a sectional front view when a conventional multilayer disk fan is used as a hot air fan.

8 is a sectional view taken along line III-III in FIG.

FIG. 9 is a sectional front view when a conventional multilayer disk fan is used as a hot air fan.

[Explanation of symbols]

 A Multi-layer disc fan 20 Fan blade 24 Annular disc 25 Spacer

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F04D 17/16 F04D 29/28

Claims (1)

(57) [Claims] 1. A plurality of notches extending toward an outer peripheral edge are respectively formed in inner peripheral edges of a plurality of annular disks forming a fan blade by laminating at a fixed interval from each other. And, on the outer edge of the vertically long plate-shaped spacer having a height substantially equal to that of the fan blade, a receiving notch is formed corresponding to the position of the notch of the annular disk,
A multi-layered disk fan configured such that a notch and a receiving notch are engaged with each other to hold an annular disk at a constant interval by a vertically long plate-like spacer.