KR20100091002A - Turbofan and air conditioner having the same - Google Patents

Abstract

PURPOSE: A turbo fan and an air-conditioner including the same are provided to reduce the separation area of air flow by the outer end of a blade formed to downward slope toward a shroud from a main plate. CONSTITUTION: A turbo fan(1) comprises a main plate(10), blades(30) and shrouds(20). The blades are perpendicularly arranged on both sides of the main plate. The shroud comprises intakes(21). The shrouds connect the other ends of the blades and are respectively arranged on both sides of the main plate. The main plate has a larger diameter than the shroud. The blades are arranged along both sides of the main plate at given intervals. The flow separation of the air which is sucked through the intakes and discharged among the main plate, the shrouds and the sloped blades is reduced.

Description

Turbo fan and air conditioner including same {Turbofan and air conditioner having the same}

The present invention relates to a turbofan and an air conditioner including the same, and more particularly, to a turbofan and a noise that reduce flow loss by eliminating a peeling region of the flow occurring on the abacus, shroud and blade, and the like. It is about the air conditioner.

In general, the blowing fan is used as a means for conveying air by the rotational force of the van or rotor, and is applied to a refrigerator, an air conditioner, a vacuum cleaner, and the like. In particular, 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 or its shape.

Among them, the turbo fan is a method of injecting air from the axial direction of the fan to the radial discharge between the blades, that is, through the side of the fan, the air is naturally introduced into the fan and discharged to the outside, so no duct is required. It is widely applied to ceiling-mounted air conditioners, which are relatively large products.

However, the conventional turbofan as described above has a problem in that separation of the flow occurs in the process of bending the air introduced in the axial direction at a right angle, and thus, it is not discharged smoothly and abnormal noise occurs.

It is an object of the present invention to provide a turbofan and an air conditioner including the same, which eliminates the flow separation of the discharged air to reduce the loss of flow and the occurrence of abnormal noise.

Turbo fan according to the present invention, the main plate; A plurality of blades disposed perpendicular to both side surfaces of the main plate; And, a suction port is formed, and includes two shrouds are connected to the other end of the blade and disposed on both sides of the main plate, respectively, wherein the blade is formed with the outer end inclined downward from the main plate side to the shroud side.

In addition, the air conditioner according to the present invention, abacus; A plurality of blades disposed perpendicular to both side surfaces of the main plate; And a turbo fan having a suction port formed therein, the two shrouds connecting the other ends of the blades to be disposed on both sides of the main plate, and the outer end of the blade being inclined downward from the main plate side to the shroud side. do.

The turbofan and the air conditioner including the same according to the present invention configured as described above can reduce the area where air flow is peeled off because the outer end of the blade is formed to be inclined downward from the main plate side to the shroud side. Therefore, the flow loss is reduced, there is an effect that the abnormal noise is reduced.

Further, blades are disposed on both sides of the main plate, and the air is sucked in and discharged from the vertical direction of the turbofan. Therefore, the amount of air blown can be increased.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a perspective view of a turbofan 1 according to an embodiment of the present invention. FIG. 2 is a partially enlarged view showing the positive pressure surface 31 of the turbofan 1 shown in FIG. 1. 3 is a partially enlarged view showing the negative pressure surface 32 of the turbofan 1 shown in FIG. 1. Hereinafter, a description will be given with reference to FIGS. 1 to 3.

 The turbo fan 1 includes a main plate 10 rotated by a fan motor (not shown), a plurality of blades 30 vertically disposed along both sides of the main plate 10, and a plurality of blades 30. And a shroud 20 connecting the other end. Here, since the plurality of blades 30 are disposed on both sides of the main plate 10, two shrouds 20 are provided on both sides of the main plate 10.

Inlet and outlet portions for sucking air are respectively formed in the upper and lower portions of the turbo fan 1, a flow path for guiding the air in the direction to discharge the air is formed in the center portion, and in the side portion for discharging the sucked air. The discharge port 25 is formed. In more detail, the inlet 21 is formed by opening the central portion of the shroud 20, and the outlet 25 is formed by a space formed by the main plate 10, the shroud 20, and the blades 30.

Both sides of the blade 30 form a pressure surface 31 and a negative pressure surface 32, respectively, and are disposed on both sides of the main plate 10 in a radially vertical direction between the main plate 10 and the shroud 20. Since the blades 30 are disposed on both sides of the main plate 10, air can be sucked from both sides along the up and down axial directions, and then discharged laterally, thereby allowing more air to be blown.

On the other hand, the blade 30 is preferably arranged at regular intervals along both sides of the main plate 10, as shown in Figure 1 blades arranged on the upper side of the main plate 10, and the blades arranged on the lower side Are preferably arranged staggered with each other.

Air introduced into the blade 30 through the inlet 21 is introduced along the inside of the negative pressure surface 32 and discharged along the outer end of the negative pressure surface 32. In the present embodiment, the blade 30 is formed in a flat plate shape, but the scope of the present invention is not limited to this, the blade 30 may be formed to form a curved surface as a whole. In this case, the convex side of the curved surface will be the positive pressure surface, and the concave side will be the negative pressure surface.

On the other hand, one end of the blade 30 is vertically connected to the main plate 10 as described above, the other end is connected to the shroud 20, the outer end 33 of the blade 30 from the main plate 10 side It is formed to be inclined downward toward the shroud 20 side. That is, assuming a virtual vertical axis orthogonal to the main plate 10, the outer end 33 of the blade 30 is formed to be inclined in the inner direction of the turbofan 1 at a predetermined angle with the virtual vertical axis. . Therefore, when the main plate 10 and the shroud 20 are formed in a circular shape as in the present embodiment, it is preferable that the outer diameter of the main plate 10 is larger than the outer diameter of the shroud 20.

The outer end 33 of the blade 30 is inclined so that the surface of the main plate 10, the shroud 20 and the blade 30 when air sucked through the inlet 21 is discharged through the outlet 25. Since it is possible to reduce the peeling from, there is an advantage that the flow of air to be sucked and discharged smoothly and noise is reduced. In particular, there is an effect that can reduce the peeling phenomenon and the generation of vortex (flow) tends to occur in the portion in which the air sucked through the inlet 21 is bent in the perpendicular direction.

On the other hand, when the air sucked through the inlet 21 flows through the surfaces of the shroud 20 and the main plate 10, the boundary layer is developed, the larger the area of the blade 30 that is immersed in the boundary layer of the flow due to friction Losses occur and noise increases. In one embodiment of the present invention, since the air flows smoothly and is discharged along the outer end 33 of the inclined blade 30, the boundary layer is prevented from developing on the surfaces of the main plate 10 and the shroud 20. It reduces the area of the blade 30 submerged in the boundary layer.

Meanwhile, as illustrated in FIG. 1, the outer end 33 of the blade 30 forms an angle of 2 to 15 degrees between the abacus 10 and an imaginary vertical line perpendicular to the abacus 10, and the shroud ( It is preferable to be inclined downward toward the 20) side.

Referring to the operation of the turbofan 1 shown in Figure 1 as follows.

When the turbo fan 1 is rotated by the driving of a fan motor (not shown), external air flows into the inlet port 21 by the rotation of the blade 30, and the introduced air flows through the main plate 10 and the shroud 20. And a discharge port 25 which is a space formed by the blade 30. In this process, since the flow of air is discharged while bending at right angles from the suction port 21 side to the discharge port 25 side, the discharged air is caused to peel off the flow near the negative pressure surface 32 of the blade 30. This may cause problems such as loss of flow and abnormal noise such as a decrease in wind speed of the discharged air.

In order to solve the problem as described above, the blade 30 is formed by the outer end 33 is inclined downward toward the shroud 20 side from the main plate 10 side, it is sucked through the suction port 21 is discharge port 25 By smoothing the flow of air discharged through the suppression of the development of the boundary layer, it is possible to alleviate the peeling phenomenon of the flow, and to reduce the generation of vortex.

4 is a schematic diagram of an embodiment of an air conditioner including an air conditioning unit 120 having a turbofan 1 shown in FIG. 1. Since the configuration of the turbofan 1 is the same as described above, a description thereof will be omitted.

The air conditioner includes at least one indoor unit (160) for discharging air conditioning the refrigerant and indoor air through the discharge ports (160a, 160b) to the room, an outdoor unit (140) for exchanging the refrigerant with the outside air, and an outdoor unit. An air handling unit 120 (AHU) for supplying air indoors and exhausting or circulating the indoor air to perform air conditioning of the indoor space, the outdoor unit 140, the indoor unit 160, and the air conditioning unit 120. And a refrigerant distribution unit 170 for selectively distributing the refrigerant therebetween. Hereinafter, in the present embodiment, it will be described that two indoor units 160 are provided, but the scope of the present invention is not limited thereto.

The refrigerant circulates between the indoor unit 160, the outdoor unit 140, and the air conditioning unit 120, and heat-exchanges with indoor / outdoor air while the refrigerant undergoes compression, condensation, expansion, and evaporation, thereby air conditioning the indoor space.

The air conditioner includes expansion valves 164a and 164b for expanding refrigerant circulating between the refrigerant distribution unit 170 and the at least one indoor unit 160, and the refrigerant circulation unit 170 and the air conditioning unit 120. It may further include an expansion valve 117 for expanding the refrigerant.

The air conditioning unit 120 includes an indoor air inlet 134 through which room air (RA) is sucked, and an exhaust port 136 for exhausting the sucked indoor air (RA) to the outside as outdoor exhaust (EA). And a circulator 112 disposed between the indoor air intake port 134 and the exhaust port 136 and having a turbo fan 1 for circulating air from the indoor air intake port 134 side to the exhaust port 136 side. Can be.

In addition, the air conditioning unit 120 includes an outdoor air inlet 132 for sucking outdoor air (OA), a blower 138 for discharging the sucked outdoor air (OA), and an outdoor air inlet 132. And a blower 114 having a turbo fan 1 disposed between the air vents 138 and generating a blowing force, and a filtration device 114 for purifying the outdoor air OA sucked through the outdoor air inlet 132. ), A heat exchanger 116 for heat-exchanging the air passed through the filtration device 114 with the refrigerant distributed from the cold distribution unit 170, and a humidity control device 118 for controlling the humidity of the air heat-exchanged with the heat exchanger 116 ) May be further included. The filtration device 114, the heat exchanger 116, and the humidity adjusting device 118 need not necessarily be arranged in the same order as in the present embodiment, and the scope of the present invention is not limited by the placement order.

Meanwhile, the air conditioning unit 120 replaces the heat exchanger 116 with a gas heat pump (GHP), an electric heat pump (EHP), or a ground source heat pump (GSHPs). It may be implemented in various ways to heat exchange the sucked outdoor air (RA) by using a variety of heat sources such as).

Looking at the process of the indoor air is harmonized by the air conditioning unit 120 as follows.

The outdoor air OA is sucked through the outdoor air inlet 132 by the suction and the blowing force generated while the turbo fan 1 of the blower 114 rotates, and the suctioned outdoor air OA is filtered. The dust is removed while passing through the 114, heat exchanges through the heat exchanger 116, humidity is adjusted while passing through the humidity control device 118, and then discharged to the indoor space through the air vent 138.

When the turbo fan 1 of the circulator 112 rotates, the indoor air R.A is sucked through the indoor air inlet 134 and then discharged to the outside as the exhaust E.A through the exhaust port 136.

That is, the air conditioning unit 120 discharges muddy indoor air (RA) to the outside, air conditioning the outdoor air (OA) through the filtration, heat exchange, and humidity control process, air conditioning and the air discharged into the room (SA) supply air to ventilate the room and keep it comfortable.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

1 is a perspective view of a turbofan according to an embodiment of the present invention.

FIG. 2 is a partially enlarged view illustrating a static pressure surface of the turbofan illustrated in FIG. 1.

3 is a partially enlarged view illustrating a negative pressure surface of the turbofan illustrated in FIG. 1.

4 is a schematic diagram of an embodiment of an air conditioner including an air conditioning unit with a turbofan shown in FIG. 1.

<Brief description of the symbols of the main parts of the drawings>

1: turbofan 10: abacus

20: shroud 21: inlet

25: discharge port 30: blade

31: Positive pressure surface 32: Negative pressure surface

33: outer end 120: air conditioning unit

112: circulator 114: blower

132: outdoor air intake 134: indoor air intake

136: exhaust port 138: air vent

Claims (6)

abacus; A plurality of blades disposed perpendicular to both side surfaces of the main plate; And An inlet is formed, and includes two shrouds connected to the other ends of the blades and respectively disposed on both sides of the main plate, The blade is a turbo fan, the outer end is formed inclined downward from the main plate side to the shroud side. The method of claim 1, The main plate is a turbo fan having a larger diameter than the shroud. The method of claim 1, The plurality of blades are turbofans are arranged at regular intervals along both sides of the main plate. The method of claim 1, The turbo fan is sucked through the suction port is reduced flow separation of the air discharged between the main plate, the shroud and the inclined blade. abacus; A plurality of blades disposed perpendicular to both side surfaces of the main plate; And An air inlet is formed and includes two shrouds connected to the other ends of the blades and disposed on both sides of the main plate, and an outer end of the blade includes a turbo fan formed to be inclined downward from the main plate side to the shroud side. Harmonizer. The method of claim 5, An air conditioning unit for supplying outdoor air to the room and exhausting or circulating the indoor air to perform air conditioning of the indoor space, The turbo fan is provided in the air conditioning unit.

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