KR20090005215U - Turbofan and air conditioner having the same - Google Patents

Abstract

Disclosed are a turbo fan and an air conditioner having the same, which can increase the air volume and reduce air noise. The disclosed air conditioner includes a drive motor fixed to the upper surface of the main body case, a turbo fan coupled to the shaft of the drive motor, and a heat exchanger installed around the periphery of the turbo fan inside the main body case. It includes a rotating plate coupled to, a plurality of blades coupled to the outer peripheral portion of the rotating plate, and a ring-shaped shroud coupled to the blade end, the blade is characterized in that the suction side width is formed 1.3 ~ 1.8 times larger than the discharge side width.

Description

TURBOFAN AND AIR CONDITIONER HAVING THE SAME}

The present invention relates to a turbo fan and an air conditioner having the same, and more particularly, to a turbo fan and an air conditioner having the same that can increase the air volume and reduce the blowing noise.

In general, the blowing fan is a device for blowing air by the rotational force is used in a refrigerator, an air conditioner, a cleaner. The blower fan is classified into an axial fan, a sirocco fan, a turbo fan, and the like according to a method of suctioning and discharging air and its shape. Among these, the turbo fan is a blower fan that introduces air in the axial direction of the fan and discharges it between the blades, that is, in the radial direction of the fan, so that the air naturally flows into the fan and flows out, so there is no need for a duct. have.

That is, a turbo fan is a kind of centrifugal fan that radially blows air introduced in an axial direction, and Korean Patent Laid-Open No. 2002-19160 discloses a turbo fan applied to an air conditioner. The turbofan has a rotor with a hub in the center, multiple blades coupled to the rotor, and a circular shroud that connects the blades. In addition, the turbofan is formed such that the outer diameter of the rotating plate is smaller than the inner diameter of the shroud.

Inlet of the turbo fan is formed on the front surface of the turbo fan and discharge port for discharging the sucked air is formed on the side, and when the turbo fan is rotated by the drive of the drive motor, the outside air inside the shroud by the rotational force It is sucked through the suction port formed in the suction air is discharged to the discharge port side along the flow path between the blades. In recent years, the turbo fan enables slimming as a whole, so that the space inside the main body case of the air conditioner can be efficiently used, and the space can be used for mounting of other mechanical parts, so that rationality can be expected.

The turbofan for an air conditioner disclosed in Korean Laid-Open Patent Publication No. 2002-19160 forcibly pushes air sucked during rotation of a blade to discharge air, and the air volume of the blown air is the rotational speed of the turbofan and the blower surface of the blade. However, if the number of revolutions of the turbo fan is increased, the effect of raising the air volume can be obtained, but the noise and vibration are increased.

In addition, if the blade is larger, the vibration of the fan may collide with other mechanical parts, and thus the operation of the fan may become unstable, and the size of the fan as a whole may be hindered in miniaturization of the air conditioner. On the other hand, since the turbo fan of the slim structure has a limited width on the discharge side of the fan and is integrally injected, the streamlined shape and length of the shroud are limited, so that the air blower surface cannot be increased, and thus the air blower is not efficient in increasing the airflow amount.

The present invention is to solve the above problems at the same time, the purpose of the present invention is to have a slim (Slim) structure to form a relatively small blade discharge side width while optimizing the ratio of the blade suction side width and discharge side width blowing amount To improve the problems that can be reduced and the noise generated during operation. In addition, an object of the present invention is to provide a slim turbofan and an air conditioner having the same so as to efficiently use the space inside the main body case of the air conditioner.

The air conditioner according to the present invention includes a drive motor fixed to the upper surface of the main body case, a turbo fan coupled to the shaft of the drive motor, a heat exchanger installed around the outside of the turbo fan inside the main body case, the turbo The fan includes a rotating plate coupled to the shaft of the drive motor, a plurality of blades coupled to an outer circumferential portion of the rotating plate, and a ring-shaped shroud coupled to the blade end, wherein the blade has a suction side width of 1.3 to a discharge side width. It is characterized in that it is formed 1.8 times larger.

In addition, the rotary plate, the blade and the shroud of the air conditioner turbofan according to the present invention to be molded integrally.

In addition, the turbofan according to the present invention is a turbofan comprising a rotary plate coupled to the shaft of the drive motor, a plurality of blades coupled to the outer peripheral portion of the rotary plate, and a ring-shaped shroud coupled to the blade end, the blade is It is characterized in that the suction side width is formed 1.3 to 1.8 times larger than the discharge side width.

In addition, the rotor plate and the blade and the shroud of the turbofan according to the present invention to be molded integrally. Here, the outer diameter of the rotating plate is characterized in that it is formed the same as the inner diameter of the shroud or smaller than the inner diameter of the shroud.

The turbofan according to the present invention allows a large amount of air to be introduced and blown from the suction side of the blade to increase the blowing amount, so that the suction flow can be smoothly introduced along the blade, the vortex and separation that can occur on the suction side By minimizing etc., it is possible to reduce blowing noise. In addition, by making the overall slim, the space inside the main body case of the air conditioner can be used efficiently, so that the space can be used for mounting of other mechanical parts, and the rationality can be expected.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail.

1 is a cross-sectional view showing a ceiling air conditioner employing a turbo fan according to the present invention. As shown, the air conditioner of the present invention is coupled to the open lower surface of the box-shaped body case 100 and the main body case 100 which is installed to enter into the ceiling 500, the ceiling covering the opening of the ceiling The panel 200 is provided.

Inside the main body case 100 is provided with a turbo fan 400 for sucking air from the bottom to discharge in a radial direction, and a drive motor 110 for driving the turbo fan 400. The drive motor 110 is fixed to the inner upper surface of the main body case (100). In addition, a heat exchanger 120 is disposed around the turbo fan 400 to surround the turbo fan 400 for heat exchange of air discharged from the turbo fan 400. In addition, a condensate receiver 130 is installed at a lower portion of the heat exchanger 120 to collect and discharge the condensate generated in the heat exchange process. The condensate receiver 130 is supported by the ceiling panel 200.

In the ceiling panel 200, an inlet 210 for suctioning indoor air is formed in the center, and a plurality of outlets 220 narrow and long are formed outside the inlet 210. In addition, the inlet portion 210 of the ceiling panel 200 is provided with a filter 230 for cleaning the air, the opening in the center to guide the air sucked into the inside of the filter 230 to the center of the turbofan 400 An air guide plate 240 in which 241 is formed is installed.

In addition, the turbo fan 400 according to the present invention, as shown in Figure 2, the rotating plate 410, the hub 411 is formed to be coupled to the rotating shaft of the drive motor in the center, the outer peripheral side of the rotating plate 410 A plurality of blades 420 radially arranged at regular intervals and coupled vertically with respect to the rotating plate 410, and a shroud coupled to an upper portion of each of the plurality of blades 420 in a ring shape to prevent vibration and guide fluid. 430.

Rotating plate 410 is formed in a disk shape of a predetermined thickness, the hub 411 provided in the center for connection with the drive motor, and the connection boss 412 provided so that the rotation shaft of the drive motor is inserted into the center of the hub 411 It is made, including.

The hub 411 is formed to protrude relatively forward from the rotating plate 410 to provide a space for inserting the drive motor at the rear side, and the through-hole 413 for preventing overheating of the drive motor is connected to the boss 412. It is provided in the circumferential direction on the outer side.

As shown in FIGS. 1 and 2, the blade 420 receives a rotational force due to the driving of the driving motor 110 and rotates together with the rotation axis of the driving motor 110 to suck gas in the axial direction to radially. It is provided to discharge. To this end, the blade 420 is perpendicular to the rotating plate 410 is provided in a plurality is formed at regular intervals on the outer peripheral portion of the rotating plate 410. On the other hand, the blade 420 is formed to have a uniform thickness as a whole, which is to reduce the shrinkage or unformed defects that may occur during the injection of the blade 420. In addition, the inner portion of the blade 420 is formed to span the rotating plate 410 and the remaining portion of the blade 420 that is not across the rotating plate 410 is formed to protrude outwardly of the rotating plate 410. . That is, the suction side (inner end of the blade) of the blade 420 spans the rotating plate 410, and the discharge side (outer end of the blade) of the blade 420 protrudes outward of the rotating plate 410. Prepared.

In addition, the shroud 430 is provided by connecting each blade 420 in a ring shape on the top of the blade 420. The shroud 430 is provided in a streamlined shape in which the diameter decreases toward the front side, and in this case, an inlet 421 through which gas is introduced is provided at the center of the shroud 430. In addition, the discharge port 422 is formed on the side of the turbo fan 400, that is, the outer side of the flow path formed between the plurality of blades 420, the rotating plate 410 and the shroud 430. Therefore, when the turbo fan 400 is rotated by the driving motor 110, the external air is sucked through the inlet 421 formed inside the shroud 430 by the rotational force, and the sucked air is the blade 420. It is discharged to the discharge port 422 side along the flow path between them. In addition, as shown in FIGS. 1 and 2, the turbo fan 400 has an outer diameter of the rotating plate 410 equal to the inner diameter of the shroud 430 or smaller than the inner diameter of the shroud 430. This is because when the turbofan 400 is formed through injection molding, the undercut (undercut) cannot be formed in the mold, so that the rotating plate 410 and the blade 420 may not be formed. The wood 430 is to be molded integrally.

In general, the blowing elements for determining the blowing characteristics of the turbofan can be largely classified into a combination element due to the association between the blades and individual elements due to the individual characteristics of the blades and separate elements due to factors other than the blades. Examples of combination elements due to the association between the blades include the number of blades, the ratio between the connecting line of each blade inner end and the connecting line of the outer end, and the length of the line segment connecting each blade outer end. An example of the individual element is the inner end of the blade. The length of the line connecting the outer end and the ratio of the inlet angle and the outlet angle, the width of the inlet side of the inner length of the blade and the discharge side width of the blade outer length. Another element is the inner diameter of the shroud.

As shown in FIG. 3, the present invention provides a suction side width W1, which is an inner end of the blade 420, and a discharge side width W2, which is an outer end of the blade 420, among the blowing elements for determining the blowing characteristics of the turbofan 400. By optimizing the ratio of the) to increase the blowing amount is characterized in that the problem of noise generated during the operation of the turbofan 400 is improved. The turbo fan 400 allows the suction side width W1 of the blade 420 to be formed larger than the discharge side width W2 of the blade 420. Preferably, the suction side width W1 is formed to be 1.3 to 1.8 times larger than the discharge side width W2. This is because the width of the blade (W1) at the inlet portion in which air is introduced into the turbo fan 400 to increase the blowing surface to maximize the effect of the flow guide effect and increase the amount of blowing air so that the vortex region at the suction side of the blade 420 This is to reduce the noise of the turbo fan 400 accordingly. In other words, the discharge side width (W2) is reduced to prevent the possibility of the fan operation unstable due to collision with other mechanical parts, and also the size of the fan as a whole becomes smaller, the effect of increasing the air volume and noise while realizing a slim turbo fan It is intended to represent. Figure 4 (a) is a chart experimenting with the performance of the conventional slim turbofan, Figure 4 (b) is a chart experimenting with the performance of the turbo fan formed in the suction side width 1.3 ~ 1.8 times larger than the discharge side width according to the present invention to be. In addition, Figure 5 is a graph of the air volume compared to the noise produced by the experimental diagram of Figures 4 (a), (b) based on the air volume and noise. As shown in Figure 5, the conventional turbofan and the turbofan according to the present invention experiments at various airflow conditions as a result of the noise can be seen that the effect of reducing the noise about 1.0dBA in the same conditions. have. This means that under the condition that the same noise level is required, the turbo fan according to the present invention can generate a larger air volume than the conventional turbo fan.

The following describes the operation of the ceiling air conditioner employing such a turbo fan.

As shown in FIG. 1, when the turbo fan 400 rotates by the operation of the driving motor 110, indoor air is sucked through the inlet 210 of the center of the ceiling panel 200. The indoor air that is suctioned is purged while passing through the filter 230, and then flows into the turbofan 400 through the opening 241 of the air guide plate 240. The air is discharged while turning in the circumferential direction of the turbo fan 40 by the rotational force of the turbofan 400. The air discharged from the turbo fan 400 becomes cold while passing through the heat exchanger 120, and then is supplied to the indoor space through the outlet 220 of the ceiling panel 200. At this time, the suction side width of the blade is formed 1.3 to 1.8 times larger than the discharge side width, so that a lot of air is introduced and blown from the suction side of the blade 420. Therefore, the blowing amount is increased and the suction flow is smoothly introduced along the blade 420, thereby minimizing the vortex and peeling that can occur on the suction side can reduce the blowing noise. That is, since the amount of vortex generated on the suction side can be significantly reduced, the noise generated by the vortex can be suppressed, and the amount of air discharged is increased, thereby maximizing the efficiency of the air conditioner.

1 is a cross-sectional view showing a ceiling air conditioner to which a turbofan according to the present invention is applied.

2 is a perspective view of a turbofan according to the present invention.

3 is a cross-sectional view of a turbofan according to the present invention.

4 (a) is a diagram that experiments with the performance of a conventional turbo fan, Figure 4 (b) is a diagram that experiments with the performance of a turbofan according to the present invention.

5 is a graph showing the noise compared to the air volume according to 4 (a), (b).

Explanation of symbols on the main parts of the drawings

100: main body case 110: drive motor

120: heat exchanger 200: ceiling panel

210: inlet 220: outlet

230: filter 240: air guide plate

400: turbo fan 410: turntable

420: blade 430: shroud

W1: suction side width W2: discharge side width

Claims (5)

A main body case, a drive motor fixed to the main body case, a turbo fan coupled to the shaft of the drive motor, and a heat exchanger installed in the turbo fan inside the main body case, wherein the turbo fan includes the shaft of the drive motor. A rotating plate coupled to the rotating plate, a plurality of blades coupled to an outer circumference of the rotating plate, and a ring-shaped shroud coupled to the blade end, wherein the blade has a suction side width of 1.3 to 1.8 times larger than the discharge side width. Air conditioner. The method of claim 1, And the rotary plate, the blade, and the shroud are integrally formed. In a turbofan including a rotating plate coupled to a shaft of a drive motor, a plurality of blades coupled to an outer circumference of the rotating plate, and a ring-shaped shroud coupled to the blade end, the blade has a suction side width of 1.3 than a discharge side width. Turbo fan, characterized in that formed 1.8 times larger. The method of claim 3, Turbo fan characterized in that the rotating plate, the blade and the shroud is integrally molded. The method of claim 3, The outer diameter of the rotating plate is a turbo fan, characterized in that formed less than or equal to the inner diameter of the shroud.

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