JP2005133677A - Blower fan and electric fan using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower fan capable of efficiently and economically sending air to a distance and to provide an electric fan using it. <P>SOLUTION: A blade 3 is formed of an inner peripheral circle C1 and an outer peripheral circle C2. The blade 3 is bent so that the cross section D perpendicular to the rotary shaft 1 of the blade 3 is parallel with the straight line L connecting the intersection B of the inner peripheral circle C1 and the outer peripheral circle C2 of the blade 3 to the center of the rotary shaft 1. Thus, the blade 3 is mounted to a hub 2 at the angle at which the wind generated by a rotation is rolled inside. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a blower fan for obtaining cool air or performing ventilation, and a fan using the same.

Conventionally, various electric fans for taking cool air into a room are known (see, for example, Patent Document 1). Recently, regardless of whether it is air conditioning or heating, it is used in combination with air conditioners such as air conditioners, and warm air and cold air are circulated in the room to make warm and cold indoors more efficient and economical. The circulatory aspect of the fan that can be and can lead a more comfortable life has been reviewed.
Utility Model Registration No. 3041893

  However, the conventional fan has the following problems. In the conventional electric fan, the structure of the blade of the blower fan diffuses the wind toward the outside of the blower fan so as to blow air at as wide an angle as possible. For this reason, when using the circulator, if the air is sent far away in order to promote the circulation of the air in the room, there is a problem that the air volume has to be made very strong and is not efficient. In order to solve this problem, a so-called box-type fan in which a duct-shaped outer frame is provided on the outer periphery of the blower fan in order to restrict the wind toward the center of the blower fan is also known. Providing the cable is a secondary measure, so there is a problem that the loss is large and the appearance is not good. There is also a problem that the cost of parts increases.

  On the other hand, there is a demand for a cooler wind even with a single fan.

  The present invention has been made to solve the problems of the prior art, and a first object of the present invention is to provide a blower fan that can efficiently and economically send wind away and a fan using the same. And

  Moreover, this invention makes it the 2nd objective to provide the electric fan which can obtain a cooler wind only with an electric fan.

  In order to achieve the first object, the blower fan according to the present invention includes a hub having a rotation shaft and a plurality of blades formed on the outer periphery of the hub, and the blades have an inner circle and an outer circle. And the blade in a direction perpendicular to the rotation axis of the blade is parallel to a straight line connecting the intersection of the inner and outer circumference circles and the center of the rotation axis. It is curved.

  According to the blower fan configured as described above, the plurality of blades are formed on the outer periphery of the hub having the rotation shaft.

  The blade is composed of an inner circumference circle and an outer circumference circle, and a cross section in a direction perpendicular to the rotation axis of the blade is an intersection of the extension line of the inner circumference circle and the extension line of the outer circumference circle of the blade, and the center of the rotation axis The blade is curved so as to be parallel to a straight line connecting the two. Thereby, the blade is in a state of being attached to the hub at an angle that winds the wind generated by the rotation.

  Therefore, since the wind generated by the blades flows inward as the blower fan rotates, it is possible to efficiently move the wind far away even with the same airflow without providing a duct-shaped outer frame on the outer periphery of the blower fan. Can send.

  In addition, another blower fan according to the present invention includes a hub having a rotating shaft and a plurality of blades formed on an outer periphery of the hub, and the blade includes an attachment portion and a wing portion. A portion is formed using an inner circumference circle and an outer circumference circle, the attachment portion is attached in parallel to a plane perpendicular to the rotation axis, and a cross section of the wing portion in a direction perpendicular to the rotation axis is the inner circumference The blade is curved so as to be parallel to a straight line connecting the intersection of the circle and the outer circumferential circle and the center of the rotation axis.

  According to the fan configured as described above, a blade having an inner circumference circle and an outer circumference circle as constituent elements is formed from a plate-like member, the intersection of the inner circumference circle and the outer circumference circle on the blade, and the center of the rotation shaft Draw a line (reference line) parallel to the straight line connecting the two and fold the outside of the reference line (wing side) with the reference line as the boundary, and the cross section in the direction perpendicular to the rotation axis of the folded wing part is the reference line The wings are curved so that they are parallel to each other. Thereby, a braid | blade will have an attachment part which has a plane perpendicular | vertical with respect to a rotating shaft, and a wing | blade part which has an angle which winds the wind which arises by rotation inside.

  Therefore, since the wind generated by the blades flows inward as the blower fan rotates, it is possible to efficiently move the wind far away even with the same airflow without providing a duct-shaped outer frame on the outer periphery of the blower fan. Can send.

  Moreover, the electric fan which concerns on this invention is equipped with the ventilation fan of the said structure. As described above, since a duct-like outer frame is unnecessary, an increase in cost can be suppressed and the appearance can be improved.

  In order to achieve the second object, the electric fan according to the present invention supplies a fan with a hub having a rotating shaft, a plurality of blades formed on the outer periphery of the hub, and water to the hub. The hub includes a water absorbing member that supplies the water from the water feeding device in a film-like manner to the front surface of each blade.

  According to the electric fan of the said structure, it has a ventilation fan in which the several blade was formed in the outer periphery of the hub which has a rotating shaft. Then, the water supplied from the water feeding device temporarily holds the water in order to supply water to each of the plurality of blades by the water absorbing member provided in the hub.

  The water sent to the water absorbing member of the hub by the water feeding device receives a centrifugal force by the rotation of the blower fan, and spreads on the blade surface in a film shape. At this time, the film-like water spreading on the blade surface is promoted to vaporize (dry) by the rotation of the blower fan. Then, when the film-like water is vaporized, the blade heat (energy) is taken away as vaporization heat, so the temperature of the blade surface and the temperature of the atmosphere in the vicinity of the blade are lowered, and thus cooler air is sent from the blower fan. It will be.

  In this way, by spreading water on the blade surface in the form of a film, a cooler wind can be obtained even with a single fan.

  In the electric fan according to the present invention, in order to achieve the first and second objects at the same time, the blade has an attachment portion and a wing portion, and the wing portion uses an inner circumference circle and an outer circumference circle. The mounting portion is formed parallel to a plane perpendicular to the rotation axis, and a cross section in a direction perpendicular to the rotation axis of the wing portion is an intersection of the inner circumference circle and the outer circumference circle, and the rotation axis. The blade is curved so as to be parallel to a straight line connecting the center of the water, and the hub includes a water absorbing member that supplies water from the water feeding device to the front surface of each blade in a film-like manner. It is.

  According to the fan configured as described above, by spreading water on the blade surface in the form of a film, a cooler wind can be obtained even with a single fan, and when the blower fan rotates, the wind generated by the blade is wound inside. Therefore, it is possible to efficiently send the wind far away even with the same air volume without providing a duct-like outer frame on the outer periphery of the blower fan. In addition, since the attachment portion of the blade is attached perpendicularly to the rotation axis, it is possible to easily transmit the film-like water from the water absorbing member to the blade, so that the room temperature can be lowered more efficiently.

  According to the blower fan and the electric fan according to the present invention, since the wind generated by the blade flows so as to be wound inward by the rotation of the blower fan, without providing a duct-like outer frame on the outer periphery of the blower fan, Even with the same air volume, it is possible to efficiently send the wind far away.

  Moreover, according to the electric fan which concerns on this invention, a cooler wind can be obtained even with an electric fan single-piece | unit by spreading water on the blade surface in a film | membrane form.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a view showing a blower fan according to an embodiment of the present invention. FIG. 1A is a front view (a view showing a projection surface of the blade in a direction perpendicular to the rotation axis), and FIG. 1B is a side view centering on one blade of FIG. It is the AA partial sectional view seen.

  As shown in FIG. 1, the blower fan 10 according to the present embodiment includes a hub 2 having a rotating shaft 1 and a plurality of blades 3 formed on the outer periphery of the hub 2. A cross section D of the blade 3 formed in a direction perpendicular to the rotation axis 1 is formed by using a circumferential circle C1 and an outer circumference circle C2, and an intersection B of the inner circumference circle C1 and the outer circumference circle C2 and the rotation axis 1 The blade 3 is curved so as to be parallel to a straight line L connecting the center of the blade. More specifically, it comprises a hub 2 having a rotating shaft 1 and a plurality of blades 3 formed on the outer periphery of the hub 2, and the blade 3 has a mounting portion 3a and a wing portion 3b, A wing portion 3b is formed using an inner circumference circle C1 and an outer circumference circle C2, and the attachment portion 3a is attached in parallel to a plane perpendicular to the rotation shaft 1, and the wing portion 3b is perpendicular to the rotation shaft 1. The blade 3 is curved so that a cross section D in the direction is parallel to a straight line L connecting the intersection B of the inner and outer circumferential circles C1 and C2 and the center of the rotating shaft 1.

  According to the blower fan 10 configured as described above, the plurality of blades 3 are formed on the outer periphery of the hub 2 having the rotating shaft 1. FIG. 2 is a diagram illustrating a state before cutting (before bending) of the blower fan of FIG. In the present embodiment, the blade 3 is formed by forming a blade 3 having an inner circumferential circle C1 and an outer circumferential circle C2 as components from a plate-like member, and an intersection of the inner circumferential circle C1 and the outer circumferential circle C2 on the blade 3. A line (reference line P) parallel to a straight line L connecting B and the center of the rotating shaft 1 is drawn, and the outside of the reference line P (the wing part 3b side) is bent and bent at the reference line P as a boundary. The wing 3b is curved so that the cross section D of the wing 3b in the direction perpendicular to the rotation axis 1 is parallel to the reference line P. As a result, the blade 3 has a mounting portion 3a having a plane perpendicular to the rotating shaft 1 and a wing portion 3b having an angle that winds the wind generated by the rotation inside.

  Here, the inner circumference circle C1 constitutes a part of the front edge of the blade 3 (the side on which the blade 3 starts to cut the atmosphere (ambient air) when the blower fan 10 rotates). C2 refers to all of the trailing edge of the blade 3 (opposite the leading edge, that is, the side where the air flow is away from the blade 3) and a part of the leading edge (the blade end on the circumference of the circle Sr formed by rotation). Between the portion R and the intersection point B), and may be an elliptical arc as well as a perfect circular arc. In the present embodiment, as shown in FIG. 2, the inner circumference circle C1 and the outer circumference circle C2 are the same arc, and become both the inner circumference circle C1 and the outer circumference circle C2 depending on whether the blade 3 is at the front edge side or the rear edge side.

  As shown in FIG. 2, the inner circumference circle C1 and the outer circumference circle C2 in the present embodiment are formed as perfect circular arcs. In this way, by forming the blade 3 using a perfect circular arc as a constituent element, both the front edge and the rear edge of the blade 3 can be formed into an arc shape, thereby reducing air resistance when the blower fan 10 rotates. Since the airflow loss can be minimized, the power consumption can be reduced. In addition, the circular arc shape makes it easy for the wind generated by the rotation to converge on the rear end portion (the rearmost portion of the outer circumferential circle C2) E of the blade 3, and the wind can be further wound inside.

  Further, in the present embodiment, the intersection point B does not coincide with the distal end portion in the rotational direction of the blade 3 as shown in FIG. 1, but this is because the distal end portion is R-processed to prevent danger. Because. Therefore, the intersection point B between the inner circumference circle C1 and the outer circumference circle C2 is the intersection point before R processing, that is, the intersection point B between the inner circumference circle C1 and the outer circumference circle C2 in FIG. 2, and in FIG. This is a concept indicating the intersection of the extension line of the outer circle and the extension line of the outer circumference circle C2 (both are indicated by broken lines).

  With the above configuration, since the wind generated by the blade 3 flows so as to be wound inwardly, it is possible to efficiently send the wind far away even with the same air volume without providing a duct-like outer frame on the outer periphery of the blower fan 10. . And by providing the ventilation fan 10 of the said structure, since a duct-shaped outer frame is unnecessary, while being able to suppress an increase in cost, it can also improve the appearance.

  In the fan provided with the blower fan 10 of the present embodiment, a duct-like outer frame may be attached to the outer periphery of the blower fan 10, but the wind is focused on the center of the rotary shaft 1 by the blower fan 10 itself. Therefore, the length of the duct can be shortened, and the blower portion of the fan can be formed thinner.

  Then, the electric fan in other embodiment of this invention is demonstrated. FIG. 3 is a view showing the vicinity of the blower fan, which is a characteristic part of the electric fan according to another embodiment of the present invention. FIG. 3A is a front view (a view showing a projection surface of the blade in a direction perpendicular to the rotation axis), and FIG. 3B is a front view centering on one of the blades in FIG. It is the side view seen from the edge direction (inner circumference circle direction). A motor unit that rotates the blower fan 10, a switch, and the like, a main body unit that supports the blower fan 10 (motor unit), a frame body for preventing injuries due to the rotation of the blower fan 10, and the like are used in a general electric fan. In FIG. 3, the illustration is omitted for simplicity.

  The electric fan of the present embodiment includes the blower fan 10 having the above configuration and a nozzle 4 as a water supply device for supplying water to the hub 2, and the hub 2 is connected to the nozzle 4 as the water supply device. The water-absorbing paper 5 is provided as a water-absorbing member that spreads and supplies the water 6 to the front surface of each blade 3 in the form of a film.

  According to the electric fan configured as described above, water 6 is supplied to the nozzle 4 from a water storage tank (not shown) attached to a frame (not shown) of the electric fan. Then, the water 6 is impregnated in the water absorbent paper 5 which is a water absorbent member provided on the front surface of the hub 2 through the nozzle 4, and the water 6 is spread evenly in order to supply water to each of the plurality of blades 3 in a film shape.

  The water 6 sent to the water-absorbing paper 5 which is the water-absorbing member of the hub 2 by the nozzle 4 receives a centrifugal force by the rotation of the blower fan 10 and is transmitted to the attachment portion 3 a of the blade 3. The water on the attachment portion 3a of the blade 3 further spreads in a film shape by centrifugal force and spreads to form a water film on the surface of the blade portion 3b of the blade 3 (shown by a broken line on the blade portion 3b in FIG. 3). ). At this time, the water 6 spreading in the form of a film on the surface of the blade portion 3 b is accelerated (dried) by the rotation of the blower fan 10. When the water 6 is vaporized, the heat (energy) of the blade 3 (wing portion 3b) is taken away as vaporization heat, so that the temperature of the blade 3 surface is lowered and the temperature of the air in the vicinity of the blade 3 is lowered. A cooler wind is sent from the blower fan 10.

  Thus, by spreading the water 6 on the blade 3 surface in the form of a film, a cooler air can be obtained even with a single fan, and the room temperature can be lowered earlier during cooling.

  Furthermore, in this embodiment, since the blower fan 10 is configured as the blower fan 10 having the above-described configuration, the wind generated by the blade 3 flows so as to be wound inwardly. Can be efficiently sent to a distant place even with the same air volume. Therefore, a cooler wind can be sent farther and the room temperature can be lowered earlier during cooling.

  Note that a metal material having high thermal conductivity may be used as the material of the blade 3. Thereby, vaporization of the water 6 spreading on the blade 3 in a film shape is further promoted, and cold air can be sent more efficiently and quickly.

It is a figure which shows the ventilation fan which concerns on one Embodiment of this invention. It is a figure showing the state before cutting out (before a curve) of the ventilation fan of FIG. It is a figure which shows the ventilation fan vicinity which is a characteristic part of the electric fan in other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Hub 3 Blade 3a Mounting part 3b Wing part 4 Nozzle (water supply device)
5 Water-absorbent paper (water-absorbing member)
C1 Inner circle C2 Outer circle B Intersection of inner and outer circles D Blade cross section perpendicular to rotation axis L Straight line connecting rotation axis center and intersection B

Claims (4)

A hub having a rotating shaft, and a plurality of blades formed on the outer periphery of the hub,
The blade is formed using an inner circle and an outer circle;
The blade is curved so that a cross section in a direction perpendicular to the rotation axis of the blade is parallel to a straight line connecting an intersection of the inner circumference circle and the outer circumference circle and a center of the rotation axis. A blower fan. A hub having a rotating shaft, and a plurality of blades formed on the outer periphery of the hub,
The blade has a mounting portion and a wing portion;
The wing is formed using an inner circle and an outer circle,
The attachment portion is attached in parallel to a plane perpendicular to the rotation axis,
The blade is curved so that a cross section of the wing portion in a direction perpendicular to the rotation axis is parallel to a straight line connecting the intersection of the inner and outer circumference circles and the center of the rotation axis. A blower fan.   An electric fan comprising the blower fan according to claim 1 or 2. A blower fan having a hub having a rotating shaft and a plurality of blades formed on the outer periphery of the hub;
A water supply device for supplying water to the hub,
The blade has a mounting portion and a wing portion;
The wing is formed using an inner circle and an outer circle,
The attachment portion is attached in parallel to a plane perpendicular to the rotation axis,
The blade is curved so that a cross section of the wing portion in a direction perpendicular to the rotation axis is parallel to a straight line connecting an intersection of the inner circumference circle and the outer circumference circle and a center of the rotation axis,
The electric fan according to claim 1, wherein the hub includes a water absorbing member that supplies water from the water feeding device in a film shape to the front surface of each blade.