JP2002349476A - Series fan - Google Patents

Abstract

(57) [Summary] [Object] To provide a series fan that does not occupy a large space, has a simple structure, and can effectively eliminate interference between two fans. A series fan according to the present invention comprises a main frame
A plurality of rotor blades 26 and 28 connected in series in the main frame in the axial direction of the series fan;
A first support 22 that is provided inside and supports one of the plurality of blades in connection with the main frame;
2 and a second support 24 separably connected to support the other of the plurality of buckets.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a series fan, and more particularly to an axial fan provided with a plurality of blades connected in series in one fan guard.

[0002]

2. Description of the Related Art An axial fan has features such as a simple structure, low cost, and a high blow rate. Therefore, it has been widely used in various systems such as air conditioners and ventilators. For example, ventilation fans for computer systems.

In general, in order to prevent the operation from being interrupted due to a fan failure, a set of standby fan systems connected in series is provided to the above-described fan system, thereby preventing damage to the system and devices. In addition, due to the relatively low overall pressure of the axial fan, the axial fan could not adequately achieve high airflow rates in high resistance systems. Therefore, when a high total pressure is required, two or more axial fans are connected in series to provide a high total pressure.

[0004] Generally, a so-called series fan is constructed by assembling two independent fan units by a special circuit design. Each fan unit also included a fan guard and a rotor system. In FIG. 1, a first fan unit includes a fan guard 13, a rotating blade device including a motor 11, a rotor ring 12 having a shaft ring 121 connected to the motor 11 and a plurality of blades 122 provided on a peripheral surface of the shaft ring 121. It consists of. Similarly, the second fan unit also includes a fan guard 16, a motor 14, and a shaft ring 151 connected to the motor 14.
And a rotating blade device including a moving blade 15 having a plurality of blades 152 provided on a peripheral surface of the shaft ring 151. After assembling the first fan unit and the second fan unit, screw them together (not shown)
To complete the series fan. However,
Such a design was complicated and required a long time and a high production cost to assemble the series fan.

[0005]

According to the above-described method, it can be seen that the conventional series fan has two independent fan units connected in series. However, connecting two fan units in series did not guarantee that the total pressure of the air blown out of the fans would be doubled. Even if only one fan operates and the other fan is on standby, the resistance between them increases, so that the standby fan reduces the overall pressure during operation to improve overall operating efficiency. Decrease. For example, if the airflow has the structure of FIG.
After passing through one fan guard 13, 16, a plurality of ribs 13
At 1,161, turbulence was generated, which had an adverse effect on the increase of the blowing pressure. As a result, the heat radiation effect of the fan was reduced. Therefore, under certain circumstances, when two axial fans are connected in series, the distance between them is increased so that interference between the two fans is minimized. However, this method cannot be applied to a case where the arrangement space is limited.

Therefore, it is desirable to develop an axial flow series fan having a plurality of moving blades which does not occupy a large space, has a simple structure, and can effectively eliminate interference between two fans. I was

SUMMARY OF THE INVENTION It is an object of the present invention to provide a series fan which can be simply, quickly and conveniently assembled and has a strong coupling structure.

Another object of the present invention is to provide an axial fan in which a plurality of rotor blades are connected in series in one fan guard, thereby effectively eliminating interference between the fans. It is in.

[0009]

In order to solve the above problems and achieve a desired object, a series fan according to the present invention is connected to a main frame in series in the main frame in the axial direction of the series fan. A plurality of moving blades, a first support provided inside the main frame and connected to the main frame to support one of the plurality of moving blades, and a plurality of moving blades detachably connected to the first support. A second support for supporting another.

According to one aspect of the invention, the first support includes a first engagement member provided on its base,
When the support includes the second engagement member provided on the base and is engaged with the first engagement member, the first support and the second support are strongly combined with each other. The first engaging member includes a plurality of holding grooves formed on a base of the first support, and the second engaging member includes a plurality of claw structures respectively received by the plurality of holding grooves. The structure of the first engagement member can be replaced with the structure of the second engagement member.

The base of the first support includes a flange, and the base of the second support includes a peripheral wall extending outward. Since the outer diameter of the peripheral wall is slightly smaller than the inner diameter of the flange of the first support, the base of the first support and the base of the second support engage with each other. Alternatively, the base of the second support includes a flange and the base of the first support includes an outwardly extending peripheral wall. Since the outer diameter of the peripheral wall is slightly smaller than the inner diameter of the flange of the second support, the base of the first support and the base of the second support engage with each other.

According to another feature of the present invention, the in-line fan further includes a plurality of motors respectively receiving the first support and the second support to rotate a plurality of blades.

[0013] The in-line first support preferably includes a base and a hollow cylinder located substantially at the center of the base and receiving one of the plurality of motors and one of the plurality of buckets. Similarly, the second support also includes a hollow cylinder located substantially at the center of the base and receiving one of another plurality of motors and one of another plurality of buckets. The second support is made of plastic or metal.

According to another feature of the present invention, the first support is connected to the main frame by providing a plurality of guard blades radially in the main frame and fixed at the ends to the inner surface of the main frame. Each of the plurality of guard blades has substantially the same shape as the blades of the plurality of blades to increase the heat dissipation effect. Preferably, the first support, the main frame and the plurality of guard blades are integrally formed and made of plastic or metal, respectively.

According to another preferred embodiment of the invention, the series fan further comprises a separator for preventing the effect of a magnetic field between two adjacent motors. The separator may be between one of the first and second supports and one of the plurality of motors,
It is provided between the first support and the second support, and is preferably a metal plate. In particular, the separator is preferably an adhesive tape containing a metal component and attached to the base of the first support or the base of the second support.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below with reference to the drawings. FIG. 2 shows the first embodiment of the present invention.
It is an assembly exploded view of the series fan concerning an example. The series fan includes the main frame 21, the first blade 26, and the second blade 2
8, including the motors 25 and 27, the first support 22, and the second support 24. The first blade 26 and the second blade 28 each have a plurality of blades on the outside thereof.

A plurality of guard blades 23 are radially provided in the main frame 21, and each end thereof has a main frame 2.
1 is fixed to the inner surface of the first support 22.
Are connected and fixed in the main frame 21. Each of the plurality of guard blades has substantially the same shape as each blade,
Increase the fan pressure to increase the heat dissipation effect. The first support, the main frame, and the plurality of guard blades are integrally formed, and are each made of plastic, metal, or a material other than plastic and metal according to the purpose.

The first support 22 includes a base and a motor 25.
And a hollow cylinder 221 located substantially at the center of the base for receiving the first bucket 26 in sequence. The second support 24 also includes a base, a motor 27 and a second rotor blade 28.
And a hollow cylinder 242 substantially located at the center of the base for receiving the The second support is made of plastic, metal, or a material other than plastic and metal, depending on the purpose. Further, as shown in FIGS. 3A and 3B, the base of the second support further includes a plurality of pawl structures 2.
4A and 4B, the base of the first support 22 includes a plurality of holding grooves 222 corresponding to the shape and position of the pawl structure 241. When assembling the second support 24 and the first support 22, when the second support 24 is rotated in the direction of the arrow shown in FIG. 4 (A), the holding groove 222 is formed as shown in FIGS. 5 (A) and 5 (B). The pawl structure 241 is engaged so that the first support 22 and the second support 24 are tightly combined.

Further, the base of the first support 22 has a flange 223, and the base of the second support 24 has a peripheral wall 243 extending outward. Its outer diameter is flange 223
The base of the first support and the base of the second support can be engaged with each other as shown in FIG. Thus, the combination of these two structures can further prevent the axial fan from vibrating in the axial and vertical directions.

The first support 22 receives the motor 25 for rotating the first moving blade 26 and the first moving blade 26 in order, and the second support 24 is engaged with the first support 22 so that the second moving When the motor 27 for rotating the blade 28 and the second blade are sequentially received, the assembly of the series fan is completed, and the first blade and the second blade are connected in series in the main frame 21 in the axial direction of the series fan. I do.

Since the second support 24 is detachably connected to the first support 22, the base of the second support 24 is inserted into the base of the first support 22, and the second support 24 is rotated, so that a screw or a screw is used. The first support and the second support can be tightly combined without requiring other materials. Thus, compared to conventional series fans, the series fan of the present invention is simple and quick to assemble, and also saves the cost of screws and other materials.

FIG. 7 shows another embodiment of the present invention.
The structure of this in-line fan is substantially the same as the structure described above except that it includes a separator. Since the distances between the two motors 35 and 37 and the magnets (not shown in the figure) after all the parts are combined are relatively short, the separator 39
Is provided between the two motors 35 and 37 to prevent the influence of the magnetic field between the two adjacent motors.

The separator 39 is provided between the first support 32 and the motor 35, between the second support 34 and the motor 37,
It can be provided between the first support 32 and the second support 34. The separator can be made of any material that has the function of blocking the magnetic field. Preferably, the separator is a metal plate, especially including a metal component,
It is cut into substantially the same shape and size as the base of the first support or the second support, and the base of the first support or the second support (the side of the support having a hollow cylinder, or the base of another support) It is preferably an adhesive tape that can be applied directly to the opposite side facing the device). In FIG. 8, the first support 32 receives the separator 39, the motor 35, and the first blade 36 thereon,
The relative position of each component after the second support 34 has received the motor 37 and the second bucket 38 thereon is shown.

The rotation speed, rotation direction, number of blades, and blade inclination angle of the first blade may be the same as or different from those of the second blade. These can be adjusted according to the actual needs and applications to achieve the purpose of further increasing the heat dissipation efficiency of the series fan. Further, the structure of the first support and the second support can be exchanged to achieve the same effect.

As described above, the present invention has been disclosed in the preferred embodiments. However, it is not intended to limit the present invention, and the technical idea of the present invention can be easily understood by those skilled in the art. Since appropriate changes and modifications can naturally be made in the scope, the scope of patent protection must be determined based on the claims and equivalents thereof.

[0026]

According to the above configuration, the present invention has the following advantages. The present invention provides a series fan that can be easily, quickly and conveniently assembled and has a strong coupling structure. This not only saves cost on screws and other parts, but also reduces assembly time. In addition, in order to prevent the influence of a magnetic field between two adjacent motors caused by the motor being too close, the present invention effectively eliminates the influence of the magnetic field by providing a separator between the two motors. Further, the present invention provides an axial fan in which a plurality of rotor blades are connected in series in a single fan guard (or a main frame), and a plurality of guard blades are provided radially in the main frame, and the inside of the main frame is provided. By fixing each end to the surface, the first support 2
2 are connected and fixed in the main frame 21. Since each guard blade has substantially the same shape as each rotor blade, it is possible to increase the blowing pressure when the fan discharges, thereby increasing the heat radiation effect. Therefore, the industrial use value is high.

[Brief description of the drawings]

FIG. 1 is an exploded view showing a prior art series fan.

FIG. 2 is an exploded view showing the series fan according to the first embodiment of the present invention.

FIG. 3A is a perspective view showing an upper portion of a second support of the in-line fan according to the present invention. (B) is a perspective view showing a second support bottom of the series fan according to the present invention.

FIG. 4A is a plan view before a first support and a second support of the in-line fan according to the present invention are engaged with each other. FIG. 4B is an enlarged vertical sectional view of a portion B in FIG.

FIG. 5A is a plan view after the first support and the second support of the in-line fan according to the present invention are engaged with each other. FIG. 5B is an enlarged vertical sectional view of a portion B in FIG.

FIG. 6 is an enlarged vertical sectional view of an AA portion of FIG. 4A showing an assembly of a first support and a second support which receive a motor and a rotor blade, respectively;

FIG. 7 is an exploded view of a series fan according to a second embodiment of the present invention.

FIG. 8 is a partially enlarged longitudinal sectional view showing the assembly of the separator, the first support and the second support having received thereon the motor and the rotor blade, respectively, along the axis of the in-line fan.

[Explanation of symbols]

 11, 14, 25, 27, 35, 37 Motor 12, 15 Moving blade 13, 16, 31 Fan guard 21 Main frame 121, 151 Shaft ring 122, 152 Blade 131, 161 Rib 22, 32 First support 23, 33 Guard Blade 24, 34 Second support 26, 36 First rotor blade 28, 38 Second rotor blade 39 Separator 222 Retaining groove 223 Flange 241, 341 Claw structure 221, 242 Hollow cylinder 243 Peripheral wall

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yu Moritoku No. 207 Datong Road, Taoyuan City, Taiwan F-term (reference) 3H032 AA04 CA02 CA04 CA10 FA01 GA00 MA11 NA06 3H034 AA02 AA18 BB02 BB08 BB17 BB20 CC01 CC03 DD07 DD24 DD30 EE02 EE05 EE09 EE11

Claims (21)

[Claims] 1. A main frame, a plurality of rotor blades connected in series in the main frame in an axial direction of a series fan, and a plurality of blades provided inside the main frame and connected to the main frame. A series fan comprising: a first support that supports one of the moving blades; and a second support that is detachably connected to the first support and supports the other of the plurality of moving blades. 2. The first engaging member, wherein the first support includes a first engaging member provided on the base, and the second support includes a second engaging member provided on the base. The series fan according to claim 1, wherein the first support and the second support are strongly combined with each other by engaging with the first fan. 3. The plurality of pawls, wherein the first engaging member includes a plurality of holding grooves formed on the base of the first support, and wherein the second engaging member is received in the plurality of holding grooves, respectively. The series fan according to claim 2, comprising a structure. 4. The method of claim 1, wherein the first engaging member includes a plurality of pawl structures formed on the base of the first support, and wherein the second engaging members respectively engage the plurality of pawl structures. 3. The series fan according to claim 2, further comprising a plurality of holding grooves formed on the base of the second support. 5. The base of the first support includes a flange, and the base of the second support includes a peripheral wall extending outward, the outer diameter of the peripheral wall being slightly smaller than the internal diameter of the flange of the first support. The series fan according to claim 2, wherein the base of the first support and the base of the second support are engaged with each other. 6. The base of the second support includes a flange, the base of the first support includes a peripheral wall extending outward, and an outer diameter of the peripheral wall is slightly smaller than an internal diameter of the flange of the second support. By doing so, the first
The series fan according to claim 2, wherein the base of the support and the base of the second support are engaged with each other. 7. The series fan according to claim 1, further comprising a plurality of motors respectively received by the first support and the second support to rotate the plurality of rotor blades. 8. The system of claim 1, wherein the first support includes a base, and a hollow cylinder positioned substantially at the center of the base and receiving one of the plurality of motors and one of the plurality of blades. The series fan according to claim 7. 9. The second support further includes a hollow cylinder substantially centrally located in the base and receiving one of the other plurality of motors and one of the other plurality of buckets. 9. The series fan according to claim 8, wherein: 10. The series fan of claim 9, wherein said second support is made of a material selected from the group consisting of plastic and metal. 11. The apparatus according to claim 7, further comprising a separator for preventing an influence of a magnetic field between two adjacent motors.
The described series fan. 12. The method according to claim 12, wherein the separator is one of the first support and the second support and one of the plurality of motors.
The series fan according to claim 11, wherein the series fan is provided between the first fan and the second fan. 13. The series fan according to claim 11, wherein the separator is provided between the first support and the second support to prevent an influence of a magnetic field between two adjacent motors. . 14. The series fan according to claim 11, wherein said separator is a metal plate. 15. The series fan according to claim 11, wherein the separator is an adhesive tape containing a metal component and directly attached to the base of the first support. 16. The in-line fan according to claim 11, wherein the separator is an adhesive tape containing a metal component and directly attached to the base of the second support. 17. Connecting the first support to the main frame by radially providing a plurality of guard blades in the main frame and fixing the guard blades to the inner surface of the main frame at each end. The series fan according to claim 1, characterized in that: 18. The series fan according to claim 17, wherein the plurality of guard blades have substantially the same shape as each blade of the plurality of rotor blades to increase a heat radiation effect. 19. The series fan according to claim 17, wherein the first support, the main frame, and the plurality of guard blades are integrally formed. 20. The series fan according to claim 17, wherein said first support, said main frame, and said plurality of guard blades are each made of a material selected from the group consisting of plastic and metal. 21. The series fan according to claim 1, wherein the series fan is an axial fan.