JPH0539795A - Multiple layer disk fan - Google Patents

Abstract

PURPOSE:To provide a multiple layer disk fan able to manufacture at a low cost and support laminated layers simply. CONSTITUTION:In a multiple layer disk fan A constructed by laminating a large number of ring-shaped disks 12 at a constant distance to each other, projecting spacers 16-1 are provided on respective disks 12, and recessed engage portions 18 and projecting engage portions 17 are provided so as to be able to engage with the tip end faces of the spacers 16-1 and the opposite side faces respectively on recesses and projections. Thereby when the ring-shaped disks 12 are laminated, transversal deviations can be prevented perfectly to eliminate the generation of turbulence and noise. And as the disks 12 are engaged with each other on recesses and projections, supporting members for laminated disks 12 can be made unnecessary, hence the number of parts can be reduced to reduce the manufacturing cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer disk fan formed by stacking annular disks by engaging spacers with each other.

[0002]

2. Description of the Related Art Conventionally, as a form of a hot air fan which can be used in a local cleaning device and a hand dryer, FIG. 12 and FIG.
There is a multilayer disc fan X shown in 3.

In such a multi-layer disk fan X, a fan blade 101 driven by an electric motor 100 is disposed on one end side of a fan casing 110, and a heater 102 is disposed on the downstream side of the fan casing 110. It is configured by arranging.

Then, the fan blade 101 is rotated by driving the electric motor 100 to generate an air flow, and the air flow is heated by the heater 102 so that warm air is sent out from the warm air air outlet 103, and The required part can be effectively dried.

Further, since the fan blade 101 is constructed by laminating a large number of annular discs 104 with a spacer 105 at predetermined intervals, the fan blades 101 utilize the frictional force generated on the surface of the annular discs 104 to generate air. A flow can be generated, and the fan can be operated quietly.

The fan blade 101 has an annular disc 10
A wing-shaped spacer 105 is integrally formed and projected on one side of the annular disc 104 by injection molding.
The integral structure of the spacer 105 and the spacer 105 is disclosed in Japanese Patent Application Laid-Open No. 56-41492.

[0007] An annular disc 10 integrated with this spacer
When stacking and fixing 4, stack the pin insertion holes in the spacer part, insert the pins 106 into the pin insertion holes of the stacked discs, and then caulk and fix the pins 106 with the upper and lower substrates 107, 108. I have to.

[0008]

However, since the annular disc 104 integrated with the spacer 105 is laminated and fixed by the pin 106 as described above, the assembly cost and the component cost are high, which is economically disadvantageous. Since the pin is inserted and fixed in the stacked discs, it is weak against the force in the plate surface direction of the annular disc, that is, in the direction perpendicular to the pin 106, and the stacking position is displaced to cause turbulent flow, which causes noise. It had a drawback that caused it to occur.

[0009]

SUMMARY OF THE INVENTION According to the present invention, in a multi-layer disc fan formed by laminating a large number of annular discs, which are kept at a constant interval from each other, a spacer is projected on the annular disc and the spacer is provided. Is provided with a concave or convex engaging portion capable of engaging in a concave-convex state on the top end surface and the opposite side surface thereof, and the spacer is an annular circle. A multilayer disc fan formed by projecting on one side surface of the plate and having a concave or convex engaging portion formed on the top end surface of the spacer and the back side surface of the annular disk, and
Spacers are provided on both side surfaces of the annular disk in a protruding manner, and concave or convex engaging portions are provided on the top end surfaces of the upper and lower spacers to provide a multi-layer disk fan.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multilayer disc fan A according to the present invention will be specifically described below with reference to the embodiments shown in the accompanying drawings.

1 and 2 show the case where the multilayer disc fan A is used as a warm air fan.

As shown in the figure, the fan casing 1 of the multi-layer disk fan A is formed by an annular peripheral wall 4 at the peripheral edges of a substantially circular front wall 2 and rear wall 3 except for the lower end opening (warm air outlet). It is formed by connecting.

In this embodiment, the fan casing 1 is fixed to the wall surface 6 via the support frame 5.

The fan casing 1 has an air intake 7 on its front wall, and fan blades a are concentrically arranged inside the air intake 7. The fan blades a are arranged in a support frame 5. The output shaft 9 of the installed drive motor 8 is connected by a nut 10 or the like.

A heater 11 made of nichrome wire or the like is arranged below the fan casing 1.

In the above basic structure, the present invention is lightweight and
As shown in FIG. 2, the annular disc 12 that can be miniaturized and mass-produced is configured by a donut-shaped disc portion having an air inlet 15 in the central portion, and one side surface of the disc 12 is formed. Is
A spacer 16 having a constant thickness is integrally projected by injection molding. This thickness means a thickness that maintains a constant distance from each other when the annular discs are laminated.

In addition, the spacer 16 is shaped like a wing so that an efficient air flow can be obtained.

The top end surface S of the spacer 16 and
A concave or convex engaging portion that can be engaged in a concave-convex state is integrally injection-molded with the opposite side surface.

In the structure shown in FIG. 5, a convex engaging portion 17 is provided on the top end surface S of the spacer 16 and a concave engaging portion 18 is formed on the opposite side surface of the spacer 16 so as to enter the inside of the spacer. And the convex engaging portion of the top end surface S of the spacer 16
The spacer 17 and the recessed engagement portion 18 on the bottom surface of the spacer can be engaged with each other.

The wing-shaped spacer 16 is an annular disc.
A large number of 12 spacers are arranged side by side, and 4 spacers 16-1 are located at 90 ° angular position.
The pin insertion hole 19 without forming the engaging portions 17 and 18 described above.
Is provided.

FIG. 6 shows a convex engaging portion formed on the top end surface S of the spacer 16 as an engaging protruding portion 20 having a protruding end, and is provided on the opposite side surface thereof. Forms an overhanging concave portion 21 that is fitted in the engaging overhanging portion 20.

These concavo-convex engaging portions not only fit the concave shape and the convex shape, but also function to prevent the engaging protruding portion 20 fitted in the protruding concave portion 21 from coming off after the engagement. In particular, when the spacer material is made of a flexible synthetic resin or the like, the engagement disengagement preventing function can be sufficiently exerted.

7 to 9 show a structure in which spacers 16 are integrally injection-molded on both side surfaces of an annular disc 12.
A concave engaging portion 22 and a convex engaging portion 23 capable of engaging in concave and convex are formed on each top end surface of each spacer projecting on both side surfaces.

In addition, the concave and convex engaging portions 22 and 23 formed on the spacers on both sides are alternately arranged between the adjacent spacers as shown in FIG.
23 and 23 are provided.

Moreover, when laminating the annular discs 12 integrally formed with the spacers 16, an intermediate annular disc 24 is provided between the annular discs 16 as shown in FIG.

That is, between the annular discs 12 with spacers, the convex engaging portions 23 formed on the top end surface of the spacer 16 are provided.
An intermediate annular disc (24) is formed by punching out an engaging through hole (25) that can be inserted through.

As described above, the annular disc 24 has the engaging insertion hole 25 as shown in FIG. 10, and the convex engaging portion 23 on the spacer.
It is provided at the location corresponding to the position.

Therefore, when the annular discs 12 having the spacers 16 formed on the both side surfaces are laminated, the intermediate annular disc 24 is provided between the concave engagement portions 22 and the convex engagement portions 23 when they are engaged with each other. That is, the convex engagement portion 23 is inserted and projected into the engagement insertion hole 25 of the intermediate annular disc 24, and the concave engagement portion 22 of the annular disc 12 of the next layer is uneven. It is to be engaged.

The convex engaging portions 23 formed on the top end surfaces of the spacers 16 on both side surfaces have protruding ends as shown in FIGS. 8 and 9, and the concave engaging portions 22 are convex engaging portions. The material is made of a flexible synthetic resin or the like so as to have a shape opposed to the portion 23 and has a function of preventing engagement disengagement.

Further, the convex engagement portion 23 is formed so as to be able to be inserted into the engagement insertion hole 25 while holding at least a height corresponding to the thickness of the intermediate annular disc 24.

The annular disc 12 in the multilayer disc fan configured as described above is assembled in a multilayer form as follows.

That is, in the embodiment shown in FIG. 6, the lower substrate 14 is provided with the engaging hole 26, and the convex engaging portion 17 of the spacer is inserted into the engaging hole 26 to form an annular disc. 12 are overlapped, and then a concave engagement portion 18 provided on the opposite side of the annular disc from the spacer
Then, the convex engaging portion 17 of the annular disc 12 to be assembled on the upper layer is fitted, and the spacer 16 is inserted while the concave engaging portion 18 and the convex engaging portion 17 are engaged in this manner. The annular discs 12 are laminated one after another with the interposition of, and the pins 27 are inserted into the pin insertion holes 19 formed in the respective annular discs 12 and the lower substrate 14 to insert the annular discs 12. Is fixed.

In the embodiment shown in FIG. 6, the lower substrate 14
An engaging hole 26 is formed in the engaging hole 26, and the spacer 16 is inserted in the engaging hole 26.
The annular discs are overlapped with each other by engaging through the engaging overhanging portion 20, and then, in the overhanging recess 21 provided on the opposite side of the spacer 16 of the annular disc 12, the annular disc 12 of the next layer is formed. Engagement protrusions 20 projectingly formed on the spacer 16 are engaged and fixed, and the engagement protrusions 20 and the protrusion recesses 21 are successively inserted with the spacers interposed therebetween.
And fix and engage.

In particular, since the engagement is tightly performed through the engagement overhanging portion 20, it is not necessary to fix the pin, and reliable fixing can be performed.

Further, in the embodiment shown in FIG. 7, as shown in FIG. 11, the intermediate annular discs 24 are sandwiched in between, and the annular discs 12 having the spacers 16 projectingly formed on both side surfaces are laminated. The convex engagement portion 23 protruding from the top end surface of the spacer 16 is replaced with the concave engagement portion.
It is tightly engaged with 22 and fixed.

An adhesive may be interposed between the concave engagement portion 22 and the convex engagement portion 23 to further tighten the engagement and fixation.

The operation of the multi-layer disk fan A having the above structure will be described below with reference to FIGS.

First, when the user presses an operation switch (not shown), the drive motor 8 and the heater 11 are operated.

The fan blade 1 is rotated by the driving of the drive motor 8 and sucks air from the outside through the air intake 7 in the fan casing 1, and the air is fed between the multi-layered discs 12 constituting the fan blade a. Through the gap from the inlet side to the back side with a substantially equal air flow distribution, then generate a downward air flow, heat with the heater 11, and then blow warm air from the hot air outlet 7-1 to the outside. To dry.

Further, since the gap between the annular discs 12 can be made as small as possible in the rotation of the fan blade a,
While maintaining the fan blade a in a compact shape, the air volume can be significantly increased, and the annular disc 12
It is possible to prevent the occurrence of turbulent flow at the entrance and exit of the pipe as much as possible, and reduce the noise caused by the turbulent flow.

Moreover, since each annular disc 12 can be engaged and recessed by the convex engaging portion 17 formed on the top end surface S of the spacer 16 and the concave engaging portion 18 formed on the opposite side surface thereof, The annular disk is evenly engaged and fixed on the entire peripheral surface, and the occurrence of turbulent flow can be prevented as much as possible without the deviation of the annular disk 12 in the plate surface direction.

[0042]

According to the present invention, the spacer is projected on the annular disc, and the concave end and the convex engaging part capable of engaging in a concave and convex state are formed on the top end face of the spacer and the opposite side face thereof. In addition, when the annular discs are laminated, there is an effect that the lateral displacement can be completely prevented, the generation of turbulence can be prevented, and the noise can be prevented. Further, there is no need for a material for supporting and fixing the laminated annular discs, so that the number of parts can be reduced accordingly and the manufacturing cost can be reduced.

[Brief description of drawings]

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

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

FIG. 3 is a plan view of an annular disc.

FIG. 4 is an enlarged sectional view taken along line II-II of FIG.

5 is an enlarged sectional view taken along line III-III in FIG.

FIG. 6 is a cross-sectional view of another embodiment.

FIG. 7 is a plan view of an annular disc according to another embodiment.

8 is an enlarged cross-sectional view taken along line IV-IV in FIG.

9 is an enlarged cross-sectional view taken along line VV of FIG.

FIG. 10 is a plan view of an intermediate annular disc.

FIG. 11 is a sectional view showing an assembled state of the annular disc of FIG.

FIG. 12 is a cross-sectional front view when a conventional multilayer disc fan is used as a warm air fan.

FIG. 13 is a sectional side view of the same.

[Explanation of symbols]

 A Multi-layer disc fan a Fan blade 12 Annular disc 16 Spacer 17 Convex engaging part 18 Concave engaging part

Claims (3)

[Claims] 1. A multilayer disc fan formed by laminating a large number of annular discs, which are held at a constant interval from each other, in which a spacer is projected on the annular disc, and a top end face of the spacer and its opposite side face are formed. In addition, a multi-layer disk fan having a concave or convex engaging portion that can be engaged in a concave-convex state. 2. The multi-layer according to claim 1, wherein the spacer is formed so as to project from one side surface of the annular disc, and concave or convex engaging portions are formed on the top end surface of the spacer and the back side surface of the annular disc. Disc fan. 3. The multi-layer disk fan according to claim 1, wherein spacers are formed so as to project from both side surfaces of the annular disk, and the concave or convex engaging portions are formed on respective top end surfaces of the upper and lower spacers.