JP3161003U - Mixed flow fan - Google Patents

Abstract

The present invention provides a mixed flow fan that solves the problem of motor temperature rise, has low airflow diffusivity, and has high targetability. There is one main body, one motor, and one mixed flow impeller, the motor is fixed in the main body, the mixed flow impeller is connected to the motor, and is coaxial with the motor. Located in the body for rotation, the motor is located in front of the mixed flow impeller. [Selection] Figure 2

Description

The present invention relates to a kind of electric fan, and more particularly to a kind of mixed flow electric fan.

Fans have functions such as accelerating airflow, exchanging air, dissipating heat, and stirring, and are widely used, for example, fans for air exchange, blowers, etc. . Conventional fans are divided into two types: axial flow type and centrifugal type. All of the above two types of fans have one main body, one impeller, and one motor. The motor is fixed in the body and connected to the impeller so that it can rotate freely. In the conventional electric fan, all the motors are installed behind the impeller. The motor is installed behind the impeller and the flow velocity of the airflow in front of the impeller is fast, whereas the flow velocity of the airflow after the impeller is slow, so the heat energy generated by the temperature rise of the motor is used. The problem of the temperature rise of the motor cannot be solved well.

As an object of the present invention, a kind of mixed-flow fan is provided to solve the problem of the conventional fan that the temperature rise problem of the motor cannot be solved well.

The present invention adopts the following technical means,
For mixed flow fans,
One body,
One motor fixed in the body,
There is a mixed flow impeller connected to the motor, the mixed flow impeller being coaxial with the motor and positioned in the main body so that it can rotate, the motor being in front of the mixed flow impeller It is a mixed flow fan located in

In a most preferred embodiment, the main body has one front cover, one rear cover, and one wind direction guiding device fixed coaxially between the front cover and the rear cover, The impeller is located in the rear cover, and the motor is fixed to the wind direction induction device.

In a most preferred embodiment, the mixed flow impeller has one hub and a plurality of rotating blades fixed at regular intervals on the outside of the hub, the front surface of the hub is a plane, and the back surface is a parabolic curve. is there.

In the most preferred embodiment, the shape of the rotary vane is an arc of uniform thickness.

In the most preferred embodiment, the rotating blade curve is a logarithmic involute curve.

In the most preferred embodiment, the projection of the rotating blade is forward tilted.

In the most preferred embodiment, the mounting angle of the rotary blade is 30 to 40 degrees, and the spatial distortion is -11 to -7 degrees.

In a most preferred embodiment, the wind direction guiding device has one outer sleeve, one inner sleeve, and a plurality of fixings fixed at a uniform interval between the outer sleeve and the inner sleeve and acting as a wind direction guiding device. There are wings.

In the most preferred embodiment, the shape of the fixed vane is an arc of uniform thickness.

In the most preferred embodiment, the front cover is a frustoconical sleeve with a rear portion larger than its front portion.

Compared with the prior art, this technology means that the motor is located in front of the mixed flow impeller, so that the heat energy generated by the temperature rise of the motor can follow the high-speed airflow from the mixed flow impeller, and the temperature of the motor Can solve the rising problem well. In addition, since the wind direction guidance device is installed in front of the mixed flow impeller, the wind direction guidance device can guide the wind direction of the high-speed high static pressure air flow accelerated by the mixed flow impeller and move the static pressure. It can be converted into pressure, and the working efficiency of this mechanism can be greatly improved. The airflow is spiraled forward at a high speed, the spread angle of the spirally flowing airflow is small, and the range is long. Become. The impeller is a mixed flow impeller, and the impeller employs a mixed operating principle of axial flow and centrifugal separation, so that the flow rate is large, the wind pressure is high, and the launch distance is long. In addition, the front cover is a frustoconical sleeve, the rear part is larger than the front part and has a convergent design, so the front cover is combined with a wind direction induction device to form a reasonable flow path, and Along with the mixed-flow impeller, the airflow is spiraled and discharged at a high pressure and a high speed, and the diffusibility of the airflow is small and the target property is strong.

In the following, the contents of the present invention will be described in more detail by combining the drawings and preferred embodiments.
1 shows a three-dimensional view of a mixed flow fan according to one preferred embodiment of the present invention. FIG. 1 shows a three-dimensional exploded view of a mixed flow fan of one preferred embodiment of the present invention. FIG. 1 shows a three-dimensional view of a mixed flow impeller of a mixed flow fan according to one preferred embodiment of the present invention. FIG. 1 shows a top view of an impeller of a mixed flow fan according to one preferred embodiment of the present invention. FIG. 1 shows a front view of an impeller of a mixed-flow fan according to one preferred embodiment of the present invention. FIG.

As shown in FIGS. 1 and 2, the mixed flow fan includes one rear cover 100, one mixed flow impeller 200, one wind direction guiding device 300, one motor 400, and one front cover 500. Have

The rear cover 100 is a cylindrical sleeve, and the rear opening of the cylindrical sleeve is a rotational surface for wind direction guidance, and the outside of the rear cover 100 is larger than the back side. Once the motor is activated, the rear cover 100 can smoothly suck the airflow into the blade path as a protective cover and a fluid accumulation device, particularly as a fluid accumulation device.

The wind direction guiding device 300 includes one outer sleeve 310, one inner sleeve 320, and five fixed blades 330, and the fixed blades 330 are evenly spaced between the outer sleeve 310 and the inner sleeve 320. The inside of the inner sleeve 320 that is fixed in an array is formed in a holder 321. In the present embodiment, the fixed blade 320 is designed as a spiral blade in order to induce a high-speed high static pressure air flow accelerated by the mixed flow impeller 200 to flow at a high speed in a spiral shape. However, the present invention is not limited thereto, and may be an arc-shaped blade having an equal thickness, an inclined blade, or a blade having a logarithmic involute curve.

The front cover 500 is a frustoconical sleeve, and its rear part is larger than its front part.

The outer sleeve 310 of the wind direction guiding device 300 is coaxially fixed between the front cover 500 and the rear cover 100, and the rear cover 100, the wind direction guiding device 300, and the front cover 500 are fixed integrally to form a main body. .

The motor 400 is fixed to the holder 321 of the inner sleeve 320, and the motor 400 has one output shaft.

As shown in FIGS. 3, 4, and 5, the mixed flow impeller 200 acts on the airflow, and the airflow is accelerated in the normal direction of the curve tangent of the blade to flow. The mixed flow impeller 200 includes one hub 210 and five rotary blades 220 fixed to the outer peripheral surface of the hub 210 at uniform intervals, and the hub 210 and the five rotary blades 220 are integrally formed. In the present embodiment, the shape of the rotary blade 220 is an arc shape with a uniform thickness, the bending coefficient K is 1.12 to 0.68, and the projection of the rotary blade 220 is forward tilted with high efficiency and low noise. The maximum forward tilt angle A is 11 degrees, the mounting angle B of the rotary blade 220 is 35 degrees, the spatial distortion C of the rotary blade 220 is -9 degrees, and the hub ratio E is 0.42. The rotating blade 220 has a logarithmic involute curve. The front surface of the hub 210 is a flat surface 211 and the back surface thereof is a parabolic curve. The performance curve of this impeller is gentle, the operation mode is wide, and the applicability is good. The flow rate of the mixed flow impeller 200 of this embodiment is large and the wind pressure is high. For example, if the mixed flow impeller with a diameter of 33.3 cm is used, the flow rate is 1550 to 1800 m ³ / h, and the wind pressure is 160 to 220 Pa. Can be reached.

As shown in FIGS. 1 and 2, the output shaft of the motor 400 is fixed to the hub 210 in order to position the mixed flow impeller 200 and move the mixed flow impeller 200. In this embodiment, the motor 400 is located in front of the mixed flow impeller 200, and the mixed flow impeller 200 is located in the rear cover 100.

The mixed-flow fan of this embodiment can produce strong wind pressure and strong air volume, and is applicable to drying and air exchange in homes, offices, and industrial enterprises. It can save and help the environment and health.

As described above, the preferred embodiment of the present invention has been disclosed. However, the design idea of the present invention is not limited to this, and those skilled in the art may make various modifications based on the idea and scope of the present invention. And they are not excluded from the scope of protection of the claims of the present invention.

Rear cover 100
Mixed flow impeller 200
Wind direction guidance device 300
Motor 400
Front cover 500
Outer sleeve 310
Inner sleeve 320
Fixed blade 330
Holder 320
Hub 210
Rotating blade 220

Claims (10)

One body,
One motor fixed in the body,
There is a mixed flow impeller connected to the motor, the mixed flow impeller being coaxial with the motor and positioned in the main body so that it can rotate, the motor being in front of the mixed flow impeller Located in the mixed flow fan. The main body has one front cover, one rear cover, and one wind direction guiding device fixed coaxially between the front cover and the rear cover, and the mixed flow impeller is disposed in the rear cover. The mixed flow fan according to claim 1, wherein the motor is fixed to a wind direction induction device. The mixed flow impeller has one hub and a plurality of rotating blades fixed at regular intervals on the outside of the hub, wherein the front surface of the hub is a plane and the back surface is a parabolic curve. The mixed flow fan according to claim 2. The mixed flow fan according to claim 3, wherein the shape of the rotary blade is an arc shape having a uniform thickness. The mixed flow fan according to claim 3, wherein the curve of the rotary blade is a logarithmic involute curve. The mixed-flow fan according to claim 3, wherein the projection of the rotating blades is inclined forward. The mixed flow fan according to claim 3, wherein the mounting angle of the rotary blade is 30 to 40 degrees, and the spatial distortion is -11 to -7 degrees. The wind direction guiding device includes an outer sleeve, an inner sleeve, and a plurality of fixed blades fixed at a uniform interval between the outer sleeve and the inner sleeve and serving as wind direction guiding. The mixed-flow fan according to claim 2, wherein The mixed flow fan according to claim 8, wherein the fixed blade has an arc shape with a uniform thickness. The mixed-flow fan according to claim 2, wherein the front cover is a frusto-conical sleeve, and a rear portion thereof is larger than a front portion thereof.

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