KR20020019159A - Turbofan for air conditioner - Google Patents

Abstract

PURPOSE: A turbo fan for an air conditioner is provided to equally discharge air by a blade and to prevent noise by efficiently flowing the air. CONSTITUTION: A turbo fan of an air conditioner comprises plural blades(60) vertically installed on an impeller plate(50); a shroud(70) connected to an end portion of the blade by having a circular shape; and a hub(52) receiving rotational force by being connected to a rotational shaft of a driving motor. The impeller plate is formed by injecting mold with the hub. A left portion of the blade is connected to the shroud and a right portion of the blade is engaged with the impeller plate. An outmost portion(62) of the blade is removed to equally flow discharged air. The outmost portion of the blade is slantingly cut. The turbo fan is formed by injecting mold. Thereby, the turbo fan of the air conditioner prevents noise by equally discharging the air.

Description

Turbo fan for air conditioner {Turbofan for air conditioner}

The present invention relates to a turbofan for an air conditioner, and when discharging air sucked from the inlet side toward the circumferential outlet, the velocity field of the discharged air is uniform, and at the same time, the loss of the discharged air can be minimized. It relates to a turbofan configured to be.

1 is an exploded perspective view showing the main configuration of a general integrated air conditioner. According to this, the bottom of the air conditioner is formed by the base fan 1, the base fan 1 is provided with various components forming the air conditioner.

The front grill 3 is installed at the indoor side of the base fan 1. The front grill 3 is provided with a suction part 3i through which air in a space for air conditioning is sucked into the air conditioner. The suction part 3i is formed to occupy approximately the lower half of the front grill 3. And the upper end of the front grill (3) is provided with a discharge grill (3e) for discharging the air heat-exchanged in the air conditioner back to the space for air conditioning.

In addition, an indoor heat exchanger 5 is installed to correspond to the suction part 3i of the front grill 3. The indoor heat exchanger (5) constitutes a heat exchange cycle in which a working fluid flows therein to exchange heat with air passing through the indoor heat exchanger (5).

At the rear of the indoor heat exchanger 5 is provided an orifice 7 for guiding the air passing through the indoor heat exchanger 5. The orifice 7 has an orifice hole 8 formed at the center thereof, and such orifice 7 passes through the room heat exchanger 5 through the orifice hole 8 to be described below. The fan 10 is guided. The orifice 7 is installed between the indoor heat exchanger 5 and the air guide 12.

The sirocco fan 10 sucks air in a space for air conditioning into the air conditioner to exchange heat in the indoor heat exchanger 5 and discharges the air back into the space. The sirocco fan 10, the front surface thereof is installed adjacent to the orifice 7 to flow the air passed through the indoor heat exchanger 5 through the orifice hole (8). The sirocco fan 10 sucks air through the suction unit 3i in the indoor side, that is, the space for air conditioning, heats it through the indoor heat exchanger 5, and discharges it back to the space for air conditioning. To provide the driving force.

The sirocco fan 10 is installed between the orifice 7 and the air guide 12. The air guide 12 serves to partition the indoor side and the outdoor side inside the air conditioner, and the lower end of the indoor heat exchanger 5 is located on the bottom surface thereof.

On the outdoor side of the air guide 12, a motor 15 for driving the sirocco fan 10 and the blowing fan 17 to be described below is mounted. Of course, the motor 15 may be mounted through a separate bracket according to the design conditions of the air conditioner. The motor 15 is provided such that the rotating shaft protrudes at both ends thereof to rotate the sirocco fan 10 and the blowing fan 17 at the same time.

Next, the blower fan 17 is installed at the outdoor side to be driven by the motor 15. The blower fan 17 is installed and driven on a rotating shaft of the motor 15, and sucks air from the outside (outside) of the air conditioner and passes the outdoor heat exchanger 24 to be described below. Allow heat exchange. A ring 18 is provided to connect the tip of the blower fan 17. The ring 18 serves to splash the condensed water on the bottom surface of the base fan 1 to the outdoor heat exchanger 24 when the blowing fan 17 is rotated.

On the other hand, the shroud 20 for guiding the air flow formed by the blowing fan 17 is installed on the base fan (1). Through the center of the shroud 20 is formed through-hole 21 in which the blowing fan 17 is located.

The outdoor heat exchanger 24 is installed on the base fan 1 so as to face the shroud 20. The outdoor heat exchanger (24) allows the air sucked from the outside of the air conditioner by the blowing fan (17) to exchange heat with the working fluid.

Next, a discharge guide 27 for guiding the air discharged from the sirocco fan 10 to the discharge grill 3e is installed at the upper end of the air guide 12. The discharge guide 27 is installed on the upper end of the air guide 12 and is coupled to the shroud 21.

And the various components described above are shielded from the outside by the outer case (28). The outer case 28 is provided with an air through-hole 29 for the air flowing into and out of the air conditioner by the blowing fan 17.

An air conditioner having such a configuration may perform cooling and heating functions. For example, in the case of cooling, the indoor heat exchanger 5 receives heat of a space for cooling and the outdoor heat exchanger 24. Will release the heat to the outside.

Looking at the conventional air conditioner as described above, it can be seen that conventionally used a sirocco fan for indoor air circulation. However, the sirocco fan used in the conventional air conditioner is designed to obtain a high air volume, and includes a plurality of blades having a curvature opposite to the rotation direction. In addition, such a sirocco fan has a structure for a separate air guide capable of guiding the flow direction of air, that is, the above-mentioned scroll substantially, so that smooth air flow is formed.

When using the sirocco fan, air is discharged only in the direction in which the air is discharged in the scroll (right side of the scroll in the drawing), whereas in the sirocco fan, the air pressure is substantially applied to the entire surface of the flow guide surface. Therefore, the wind pressure increases on the opposite side of the discharge side in the scroll, there is a disadvantage that the resistance to the rotation of the sirocco fan.

Further, since the air is discharged by being concentrated in the downstream direction with respect to the rotational direction of the sirocco fan, the air discharged by the sirocco fan may be pointed out as a whole.

As described above, in order to solve the shortcomings of the sirocco fan designed for high power, it has been proposed by the present applicant to form a flow of indoor air using a turbo fan having a higher efficiency.

The configuration of such a turbofan is shown in FIGS. 2 and 3. As shown in the drawing, a turbo fan includes a blade plate 32 forming a base plate, a plurality of blades 34 arranged at regular angles along a circumferential surface at an upper portion of the blade plate 32, and the blades ( 34 is configured to include a circular shroud 36 is installed on the upper surface.

In general, a turbo fan is a blade having an exit angle βb of the blade 34 smaller than 90 degrees, an inner diameter ratio d1 / d2 smaller than 0.8, and a curve curved backward with respect to the direction of rotation. has a blade). By using such a turbo fan, the structure of the shroud 9 shown in FIG. 1 can be abbreviate | omitted. That is, by using a turbo fan, since its blowing characteristics do not require the flow guide surface 9a of the shroud 9 to guide the air separately, the shroud 9 is omitted. As a result, the overall configuration of the air conditioner is simplified, and at the same time, high efficiency due to the characteristics of the turbofan itself can be achieved.

As shown in FIG. 3A, the plurality of blades 34 are molded in an upright state in the wing plate 32 and have a constant angle with respect to the circumferential direction. A circular shroud 36 is connected to the end thereof. In the center portion of the wing plate 32, a hub 38 having a mounting hole for connecting with the output shaft is formed in order to transmit power from the drive motor.

3b shows the air flow in the general turbo fan and its velocity vector. As the flow of air is shown by the arrow, the air which flows in at the inlet in which the shroud 36 is located exits through the circumferential direction in which the blade 34 is located. At this time, due to the inertia of the air flowing in and the shape of the blade, the air actually exiting the blade 34 increases as it goes downward (outwardly) as shown in the drawing, and is substantially rearward. It has a velocity component towards.

As shown in the figure, air having a velocity vector facing backwards hits the air guide. In the airflow formed by the turbofan, the discharged air collides with the air guide, which is a disadvantage of causing an energy loss of the airflow and substantially lowering the efficiency, and generating noise by hitting the airguide. The disadvantage is raised.

Referring to FIG. 3B as an example, it is preferable that the air discharged by the blade 34 of the turbofan does not have a velocity component directed to the right in the drawing to prevent collision with adjacent parts. At the same time, it can be said that the air discharged by the blade 34 preferably has a uniform velocity distribution over the entire length of the blade. By making the flow uniform, it is possible to prevent the generation of noise and to provide an efficient air flow as a whole.

It is an object of the present invention to provide a turbofan which is configured to most efficiently form a flow of air in a turbofan for an air conditioner.

1 is an exploded perspective view of a conventional integrated air conditioner.

2 is a perspective view of a typical turbofan.

3A is a plan view of a typical turbofan.

3b is a cross-sectional view of a typical turbofan.

4 is a perspective view of a turbofan according to the present invention;

5 is a cross-sectional view of a turbofan according to an embodiment of the present invention.

6 is a cross-sectional view of a turbofan according to another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

50 ..... Wing Plates 52 ..... Herbs

60 ..... Blade 70 ..... Shroud

Turbo fan for an air conditioner according to the present invention for achieving the above object comprises a wing plate coupled to the rotational axis of the drive motor in the center, and a plurality of blades arranged along the circumference of the wing plate; It is a technical feature that the blade outer side part of the wing plate side was partially removed.

And according to one embodiment of the invention, the portion is removed from the end of the blade, characterized in that removed to have a constant inclination toward the outside from the inside of the blade.

According to another embodiment of the present invention, the portion removed at the end of the blade is characterized in that the streamlined removal from the inside of the blade toward the outside.

According to the technical configuration of the present invention as described above, the flow velocity of the discharged air discharged in the circumferential direction by the blade as a whole, and at the same time, it is possible to minimize the speed component that is deflected in the axial direction in addition to the circumferential direction. Therefore, for example, it will be possible to prevent the loss and noise caused by the air hit the air guide installed on the rear (outside) of the turbofan.

And according to another embodiment of the present invention, further comprises a circular shroud connecting the other end of the blade, the outer diameter of the wing plate is characterized in that for molding the dimension of the inner diameter of the shroud or less.

According to this embodiment, in addition to the effects described above, it can be expected that the entire turbofan can be manufactured integrally by one injection molding.

Next will be described in more detail the technical configuration of the present invention through the embodiment shown in the drawings. In the following description of the present invention, the turbofan according to the present invention will be described through an embodiment applied to the integrated air conditioner.

4 is a perspective view of a turbofan according to the present invention, and FIG. 5 is a cross-sectional view of the turbofan according to the present invention. As shown, the turbofan according to the present invention, the wing plate 50, a plurality of blades upright from the wing plate 50, and a circular connected to the ends of the blade 60 shroud It contains 70.

As described above, the shroud 70 performs a function of introducing air by minimizing pressure loss in relation to the air guide. In addition, the substantial shape and arrangement of the blade 60 itself according to the present invention is substantially the same as the conventional turbofan.

In addition, the blade plate 50 is connected to the rotary shaft of the drive motor, the hub 52 for receiving the rotational power is molded upright from the center portion to the shroud side (indoor side). The hub 52 is a portion that is formed at the same time when the wing plate 50 is injection molded.

In addition, the blade 60 has a left side (ie, an inlet side through which air is introduced) connected to the shroud 70 in the drawing, and a right side (ie, the downstreammost side of the discharge side through which air is discharged) is It is connected to the wing plate 50. According to the present invention, in the blade 60, it can be seen that the portion 62 is connected to the blade plate 50, a part is removed.

Removing the portion 62 of the end of the blade that is connected to the vane 50 prevents the discharged air from generating a partial flow of fluid through the portion, thereby providing a uniform flow if possible. It is possible to ensure and at the same time not to form a flow of air deflected to the right in the drawing.

There may be many embodiments regarding the shape of removing a part of the outer portion of the blade plate side end of the blade 60, and one example thereof may be a method of chamfering the outer edge portion of the blade plate side end.

The chamfering process of the said part 62 processes so that the area of the chamfered process may become large in the outward direction which is the direction from which air is discharged. That is, the portion 62 is preferably formed to have a constant inclination or streamline so that the amount removed from the inner portion of the blade 60 toward the outer portion is large.

Here, cutting the portion 62 of the blade plate side outer end of the blade to have a constant inclination or streamline has the following meaning. That is, the removal to have such an inclined or streamlined means that the blade area removed from the inner side to the outer side at the wing plate side end portion of the blade 60 becomes large.

This has the same meaning as that in the end of the blade plate side blade 60, the area of the blade to be removed from the inner portion to the outer portion can be adjusted, as shown in Figure 5 through this adjustment, It will be possible to sufficiently adjust the speed and direction of the discharged air generated around the portion 62.

Substantially removing the portion 62 on the right side of the blade 60 from the drawing, as described above, ensures a uniform discharge flow and at the same time prevents the velocity component of the discharged air inclined toward the right on the drawing. It is based on that. Thus, of course, within the basic technical spirit of the present invention, many other modifications to the portion 62 are possible.

That is, the present invention, in the blade 60, it can be said that there is a basic technical idea to remove a part of the outer side of the blade plate 50 side end, in order to implement such a technical idea, In one embodiment, the portion 62 is implemented to be removed to have a constant inclination or streamline.

Next, another embodiment of the present invention will be described with reference to FIG. 6. In the description of the present embodiment, the same components as those of the above embodiment will be described with the same reference numerals.

As shown, according to the present embodiment, the outer diameter Db of the wing plate 50 is formed to be equal to or smaller than the inner diameter Da of the shroud 70, and at the same time, It can be seen that the portion 62 is formed by removing a part of the outer portion of the wing plate 50 side end portion.

The technical configuration of the portion 62 substantially removed at the end of the blade 60 is the same as in the above-described embodiment. In other words, at the wing plate side end portion of the blade 60, a part of the outer side is removed to ensure a substantially uniform flow of discharged air, and to prevent the velocity component of air toward the right side in the drawing from occurring. And according to the embodiment about the shape of the said part 62, it cuts (removes) so that it may have a constant inclination toward the outer side from the inside, or it removes so that it may have a streamlined shape.

In the present embodiment, molding the outer diameter Db of the vane plate 50 to have a dimension equal to or smaller than the inner diameter Da of the shroud 70 includes injection molding the entire turbofan according to the present invention. It is a structure for making it possible to do it.

That is, if the wing plate 50 and the shroud 70 have dimensions overlapping each other, it is impossible for the entire turbofan to be integrally injection molded by a single mold. Therefore, when the outer diameter Db of the wing plate 50 is set to be equal to or smaller than the inner diameter of the shroud 70, the entire turbofan can be molded by one injection, and the turbo, which is a main component of the air conditioner, can be formed. It is not only possible to mold the fan more simply, but also to minimize the defect rate. As a matter of fact, the technology itself in which the turbofan itself is integrally formed by one injection process as described above is proposed by the present applicant in the patent application 99-20044, and thus the detailed description thereof will be omitted.

In this embodiment, it can be expected that the blade 60, the wing plate 50, and the shroud 70 as a whole can be integrally formed by one injection molding.

In the first embodiment described above, for example, the wing plate 50 and the blade 60 are integrally formed by one injection molding, and the shroud 70 is injection molded separately. Then, each molded separately, and then the shroud 70 will be formed in one turbofan, for example, by ultrasonic welding or the like, with the shroud 70 correctly positioned on the upper portion of the blade 60.

Within the scope of the basic technical idea of the present invention, many other modifications are possible to those skilled in the art, and of course, it is also applicable to other types of air conditioners. For example, in the description of the embodiment of the present invention, an integrated air conditioner is described as an example, but the turbofan according to the present invention can be sufficiently applied to not only an integrated air conditioner but also a ceiling air conditioner or a separate air conditioner. Do. Therefore, the present invention should not be limited to the embodiments shown in the drawings, but should be interpreted by the appended claims.

According to the present invention as described above it can be expected the following effects. By applying the blade according to the present invention, formation of the discharge flow of air is relatively very small by the right end of the blade substantially in the drawing. Therefore, as compared with the conventional turbofan, it is possible to ensure the flow of discharge air uniformly over the entire length of the blade (60). In addition, in the air discharged in the circumferential direction through the blade, it can be expected that the advantage that can be prevented to occur as much as the speed component to be inclined to the right (substantially the right axial direction) on the drawing. It is apparent that this effect substantially brings the advantage of improving efficiency by minimizing the loss of discharged air by the turbofan and preventing the generation of noise.

Claims (4)

A wing plate having a circular shape, and a plurality of blades arranged along the circumference of the wing plate; Turbo fan for an air conditioner, characterized in that part of the blade outer side of the wing plate side removed. The turbofan of claim 1, wherein the portion removed at the end of the blade is removed to have a predetermined inclination from the inside of the blade to the outside. The turbofan of claim 1, wherein the portion removed from the end of the blade is streamlined from the inside of the blade toward the outside. According to any one of claims 1 to 3, further comprising a circular shroud connecting the other end of the blade, characterized in that the outer diameter of the wing plate to form a dimension less than the inner diameter of the shroud. Turbo fan for air conditioning.