KR100765199B1 - Centrifugal fan and air conditioner having the same - Google Patents

Abstract

A centrifugal fan and an air conditioner having the same are provided to simplify the manufacture by integrally forming shrouds on ventilation units so as to remove a shroud fixing operation. A centrifugal fan comprises first and second ventilation units(31,32). The first ventilation unit is formed with a ring-type first shroud(31c) integrally. The second ventilation unit is formed with a ring-type second shroud(32c) integrally and fixed to the first ventilation unit. The first ventilation unit includes a first rotating plate(31a) and a first ventilation vane(31b). The first rotating plate is shaped like a disc. One ends of the plural first ventilation vanes are connected with an outer periphery of the first rotating plate. The first shroud is connected with the other ends of the plural first ventilation vanes. The second ventilation unit is shaped like a disc, and formed with a second rotating plate(32a) and plural second ventilation vanes(32b). The second rotating plate is fixed to a rear surface of the first rotating plate. One ends of the plural second ventilation vanes are connected with the outer periphery of the second rotating plate. The second shroud is connected with the other ends of the plural second ventilation vanes.

Description

Centrifugal fan and air conditioner with same {CENTRIFUGAL FAN AND AIR CONDITIONER HAVING THE SAME}

1 is a cross-sectional view showing an air conditioner to which a centrifugal fan is applied according to a first embodiment of the present invention.

2 is an exploded perspective view of the centrifugal fan according to the first embodiment of the present invention.

3 is an exploded perspective view of a centrifugal fan according to a second embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: housing 11: inlet

12: discharge port 13: vertical direction control wing

14: fan motor 20: indoor heat exchanger

30: centrifugal fan 31: first blowing unit

31a: first rotating plate 31b: first blowing blade

31c: first shroud 31d: fusion protrusion

31e: position fixing hole 32: second blowing unit

32a: 2nd rotating plate 32b: 2nd blowing wing

32c: second shroud 32d: positioning protrusion

The present invention relates to a centrifugal fan and an air conditioner having the same, and more particularly, to a centrifugal fan capable of sucking air through both sides in the axial direction and an air conditioner having the centrifugal fan.

In general, a centrifugal fan is a fan that sucks air in an axial direction and discharges it outward in a radial direction. The centrifugal fan is applied to an air conditioner to allow air to circulate inside the air conditioner.

Conventional centrifugal fans have a disk-shaped rotating plate provided with a hub to which a rotating shaft of a fan motor which generates rotational force at its center and radially arranged so that one end is connected to the outer peripheral end of the rotating plate to generate a blowing force. It includes a blower wing and a shroud formed in an annular shape and connected to the other ends of the blower wing to guide the flow of air passing through the centrifugal fan.

Recently, centrifugal fans have been proposed to allow air to be sucked to both sides in the axial direction, thereby reducing the flow path resistance acting on the air sucked into the centrifugal fan and reducing the noise of the centrifugal fan caused by the flow path resistance. In this centrifugal fan, the shroud is preferably provided on both sides of the centrifugal fan where the air is sucked because air is sucked to both sides.

However, with the current mold technology, since the centrifugal fan with the shroud on both sides cannot be integrally manufactured, conventionally, a centrifugal fan with the shroud is used on one side, or after the shroud is manufactured separately. The method of fixing to the blown wing that is manufactured should be used, but when the shroud is formed on only one side, the force acting on the side where the shroud is formed and the side without the shroud changes during rotation, thereby causing vibration and The noise is generated, and the method of manufacturing the shroud to be fixed to the blower wing has a problem that the manufacturing of the centrifugal fan is very complicated because the shroud must be fixed to each blower blade one by one.

The present invention is to solve such a problem, it is an object of the present invention to provide a centrifugal fan having a shroud on both sides that can be easily manufactured, and an air conditioner having such a centrifugal fan.

The centrifugal fan according to the present invention for achieving the above object is manufactured separately from the first blower unit and the first blower unit in which the first shroud formed in an annular shape is fixed to the first blower unit and the ring The second shroud formed in a shape is characterized in that it comprises a second blowing unit formed integrally.

In addition, the first blowing unit includes a first rotating plate formed in a disk shape, and a plurality of first blowing blades having one end connected to an outer circumferential side of the first rotating plate, wherein the first shroud is the plurality of first blowing air. The second blowing unit is connected to the other end of the wings, the second blowing unit is formed in a disk shape and the second rotary plate is fixed to the rear of the first rotating plate, and a plurality of second blowing wings having one end connected to the outer peripheral side of the second rotating plate Including the second shroud is characterized in that connected to the other end of the plurality of second blowing wings.

In addition, a fusion protrusion for fusion with the other is protruded on any one of the surfaces of the first rotating plate and the second rotating plate facing each other.

In addition, the fusion projections are formed to extend in the radial direction outwardly and elongate to progress gradually in the circumferential direction, and a plurality of the fusion protrusions are formed to have a predetermined distance from each other in the circumferential direction.

In addition, the fusion projection is a centrifugal fan, characterized in that the plurality is formed in an annular shape around the center of rotation of the centrifugal fan.

In addition, one of the surfaces corresponding to each other of the first rotating plate and the second rotating plate protruding the position fixing protrusion for fixing the position of the first rotating plate and the second rotating plate and the other side surface fixing projection It is characterized in that the position fixing hole is inserted.

In addition, the air conditioner according to the present invention is made of a first blowing unit for sucking the axial air, and a member separate from the first blowing unit and is fixed to the rear of the first blowing unit is opposite to the first blowing unit It characterized in that it has a centrifugal fan including a second blowing unit for sucking air in the direction.

Hereinafter, an air conditioner to which a centrifugal fan is applied according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The air conditioner to which the centrifugal fan according to the present invention is applied, as shown in FIG. 1, has a housing 10 which is formed in a long vertical shape and forms an exterior, and indoor air disposed in the housing 10 and passing through the inside. An indoor heat exchanger (20) for exchanging heat and cooling or heating the indoor air, and a centrifugal fan (30) for generating suction and blowing power so that the indoor air is circulated in the housing (10) and discharged back to the indoor space. do.

In the housing 10, suction ports 11 for suctioning indoor air into the housing 10 are respectively formed at both lower sides of the housing 10, and air exchanged with the indoor heat exchanger 20 is discharged from both sides of the upper portion of the housing 10. Discharge openings 12 are formed respectively, which enable to be made. At this time, the discharge port 12 is formed vertically long vertical control blades 13 are formed long vertically to open and close the discharge port 12 and to adjust the direction of the air discharged through the discharge port 12 to the left and right.

In the upper space inside the housing, the indoor heat exchanger 20 is installed at an angle so as to have a predetermined inclination to exchange heat with the indoor heat exchanger while the indoor air passing through the inside of the housing 10 passes, and the lower space inside the housing 10. The fan case 15 is accommodated in the centrifugal fan 30 is arranged so that the air discharged from the centrifugal fan 30 can be guided to the indoor heat exchanger 20 side by the fan case 15.

The centrifugal fan 30 is rotated by a fan motor 14 generating a rotational force by receiving power and generating suction force and blowing force to suck air in the axial direction and to discharge radially outwardly. The centrifugal fan 30 is such that the air can be sucked from both sides in the axial direction so that the flow resistance is relatively low. In the present embodiment, the centrifugal fan 30 is arranged such that its axis faces the front-back direction, and the fan case 15 is open at the front and rear sides such that the indoor air is at the front and rear sides of the centrifugal fan 30. It is intended to be sucked through.

The centrifugal fan 30 sucks air from a direction opposite to the first blowing unit 31 and the first blowing unit 31 so as to suck air from both sides in the axial direction. It is formed including a second blowing unit (32).

The first blower unit 31 includes a plurality of first blower blades having one end connected to the outer circumferential side of the first rotating plate 31a and the first rotating plate 31a and spaced apart from each other in a circumferential direction. 31b and an agent formed in an annular shape to connect the other ends of the first blowing blades 31b to each other to guide air sucked into the first blowing unit 31 and air discharged from the first blowing unit 31. It includes one shroud 31c, the second blower unit 32 is one end is connected to the outer peripheral side of the second rotating plate 32a and the second rotating plate 32a formed in the shape of a disc and a predetermined distance from each other in the circumferential direction A plurality of second blower blades 32b disposed to be spaced apart from each other, and are formed in an annular shape to connect the other ends of the second blower blades 32b to each other so that the air sucked into the second blower unit 32 and the second blower unit ( And a second shroud 32c for guiding the air discharged from 32. In addition, a hub portion 32e is formed on the second rotating plate 32a so that the rotating shaft of the fan motor 14 can be installed, and a hub installation in which the hub portion 32e penetrates the first rotating plate 31a is installed. The ball 31f is provided.

According to the present invention, the first blower unit 31 and the second blower unit 32 are manufactured separately from each other, and are fixed to each other to form a centrifugal fan 30, which is formed in the first blower unit 31. The shrouds 31c and 32c are formed on both sides by manufacturing the first shroud 31c and the second shroud 32c in the second blower unit 32, respectively. It is for the production of the formed centrifugal fan 30 to be easily made.

In this embodiment, the first blowing unit 31 and the second blowing unit 32 are fixed to each other by fusion welding of the first rotating plate 31a and the second rotating plate 32a, so that the first blowing unit 31 and the first blowing unit 31 and the second blowing unit 32 are fixed to each other. 2 blower unit 32 is fixed to form centrifugal fan 30.

To this end, any one of the opposite surfaces of the first rotating plate 31a and the second rotating plate 32a fixed to each other is melted and attached to the other surface, so that the first rotating plate 31a and the second rotating plate 32a are A fusion protrusion 31d is formed to protrude from each other.

In the present embodiment, the fusion protrusion 31d is formed to protrude from the rear surface of the first rotating plate 31a so as to proceed radially outwardly of the centrifugal fan 30 and gradually progress in the circumferential direction, and a plurality of the protrusions are fixed to each other in the circumferential direction. It is arranged to be spaced apart.

Therefore, the fusion protrusions 31d protruding from the first rotating plate 31a are melted and attached to the second rotating plate 32a by a high frequency fusion method, or the like, so that the first rotating plate 31a and the second rotating plate 32a are fused together. ) Are fixed to each other, whereby the fixing of the first blowing unit 31 and the second blowing unit 32 is completed.

In addition, by allowing the first blowing unit 31 and the second blowing unit 32 to be fixed to each other at a predetermined position to match the position of the first blowing blade 31b and the second blowing blade 32b to each other. To this end, one of the first rotating plate 31a and the second rotating plate 32a protrudes from the position fixing protrusion 32d, and the other has a position fixing hole 31e into which the position fixing protrusion 32d is inserted. . In this embodiment, a positioning protrusion 32d is formed in the second rotating plate 32a, and a position fixing hole 31e is provided in the first rotating plate 31a. At this time, the position fixing protrusion 32d and the position fixing hole 31e are each provided in plural, and are arranged so as to form a predetermined distance from each other in the circumferential direction.

Therefore, the first blowing unit 31b and the second blowing unit 32 are fused in a state where the positioning protrusion 32d is inserted into the positioning hole 31e, so that the first blowing blade 31b is fused. The first blower unit 31 and the second blower unit 32 may be fixed in a state where the position and the position of the second blower blade 32b are aligned with each other.

In the present embodiment, the fusion protrusion 31d is protruded from the first rotating plate 31a as shown, but is not limited thereto, and may be formed to protrude from the second rotating plate 32a.

In addition, in the present embodiment, the fusion protrusion 31d is formed to elongate radially outward and gradually progresses in the circumferential direction, but is not limited thereto, as shown in FIG. 3 as the second embodiment of the present invention. It is also possible to form a plurality of 31d 'annularly around the center of rotation of the centrifugal fan 30'.

As described above, the centrifugal fan according to the present invention is configured such that the first blowing unit in which the first shroud is integrally formed and the second blowing unit in which the second shroud is integrally formed are fixed to each other. Since the operation for fixing the wood and the second shroud can be omitted, the manufacturing can be made more easily.

Claims (9)

delete A second blower unit having a first shroud formed in an annular shape and a second blower integrally formed with a second shroud formed in an annular shape and fixed to the first blower unit separately from the first blower unit; Including units, The first blowing unit includes a first rotating plate formed in a disk shape, and a plurality of first blowing blades having one end connected to an outer circumferential side of the first rotating plate. Connected to the other end, The second blower unit may include a second rotating plate formed in a disk shape and fixed to a rear surface of the first rotating plate, and a plurality of second blowing blades having one end connected to an outer circumferential side of the second rotating plate. Centrifugal fan, characterized in that the wood is connected to the other end of the plurality of second blowing wings. The method of claim 2, Centrifugal fan, characterized in that the fusion projection for fusion with the other protrudes on any one of the surfaces facing each other of the first rotating plate and the second rotating plate. The method of claim 3, wherein The fusion projections are formed to extend in a radially outward direction and gradually extend in a circumferential direction, and a plurality of fusion protrusions are formed to have a predetermined distance from each other in the circumferential direction. The method of claim 3, wherein The fusion projection is a centrifugal fan, characterized in that the plurality is formed in an annular shape around the center of rotation of the centrifugal fan. The method of claim 2, Position fixing protrusions for fixing the position of the first rotating plate and the second rotating plate protrudes on any one of the surfaces corresponding to each other of the first rotating plate and the second rotating plate and the position fixing protrusion is inserted into the other surface Centrifugal fan, characterized in that the position fixing hole is provided. delete A second blower unit having a first shroud formed in an annular shape and a second blower integrally formed with a second shroud formed in an annular shape and fixed to the first blower unit separately from the first blower unit; Including units, The first blowing unit includes a first rotating plate formed in a disk shape, and a plurality of first blowing blades having one end connected to an outer circumferential side of the first rotating plate. Connected to the other end, The second blower unit may include a second rotating plate formed in a disk shape and fixed to a rear surface of the first rotating plate, and a plurality of second blowing blades having one end connected to an outer circumferential side of the second rotating plate. Air conditioner, characterized in that the wood is connected to the other end of the plurality of second blowing wings. The method of claim 8, The air conditioner of claim 1, wherein a fusion projection for fusion with the other protrudes on any one of the surfaces facing each other of the first rotating plate and the second rotating plate.

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