KR100789826B1 - Air conditioner - Google Patents

Abstract

The present invention is to provide an air conditioner with a blower of a new structure that can reduce the noise and increase the blowing efficiency by employing a BLDC motor that can stably drive the blowing fan and increase the blowing amount.

To this end, the present invention provides a compressor for compressing the refrigerant passing through the indoor unit, a condenser for condensing the refrigerant passing through the compressor with ambient air, a blower fan installed inside the fan housing, and a shaft connection to the blower fan. A stator comprising a shaft, a supporter fixed to the fan housing, a core and a coil, and a rotor and a BLDC motor, and a rotatable magnet installed on the rotor frame and its inner surface. Is provided between the rotor, and the rotor and the shaft to transfer the rotational force of the rotor to the shaft, there is provided an air conditioner comprising a rotor bushing installed into the rotor frame.

Sirocco Fan, Fan Housing, BLDC, Motor, Supporter

Description

Air Conditioner {AIR CONDITIONER}

1 is a perspective view showing a blower of the air conditioner according to the present invention

2 is a reference perspective view showing a state in which the assembly of the BLDC motor and the supporter is separated from the fan housing and the blower fan;

Figure 3a is a sectional view showing a blower according to the present invention

FIG. 3B is an enlarged view of the motor and the supporter of FIG. 3A

Figure 4a is a perspective view showing the supporter of Figure 3a

4B is a bottom perspective view of FIG. 4A

5 is a partial perspective view showing a state in which the damping member is assembled to the supporter fixing portion of the supporter;

Figure 6a is a perspective view showing the appearance of the sirocco fan of Figure 3a

6B is a top view of 6A

Figure 7a is a perspective view of the rotor of Figure 3a, a partial cutaway perspective view to show the internal structure

FIG. 7B is a bottom perspective view of FIG. 7A

Figure 8a is a perspective view of the rotor bushing of Figure 3a

FIG. 8B is a bottom perspective view of FIG. 8A

9 is a perspective view showing another embodiment of a magnet applied to the rotor

10 is a perspective view of the stator of FIG. 3A

11 is an exploded perspective view of FIG. 10;

12 is an enlarged view of the core of FIG. 11, illustrating a spiral core;

Figure 13 is a perspective view showing another example of the stator applicable to the present invention

FIG. 14 illustrates the core structure of FIG. 13, illustrating a split core. FIG.

15 is a perspective view showing still another example of the stator applicable to the present invention

FIG. 16 illustrates the core structure of FIG. 15, and is a perspective view illustrating a tong core.

17 is a perspective view showing another embodiment of the supporter applied to the present invention

18 is a partially cutaway perspective view showing a state in which a blower according to the present invention is applied to an outdoor unit for an air conditioner of a front suction type;

19 is an exploded perspective view of an outdoor unit for an air conditioner of a front suction method using a blower according to the present invention;

20 is a front view of an outdoor unit for an air conditioner of the front suction method using the blower according to the present invention.

21 is a cross-sectional view of a blower according to another embodiment of the present invention.

22 to 26 show each embodiment for reducing the noise of the motor according to the present invention,

22 to 24 are a perspective view and a plan view showing the plug member and its installation state;

25 is a perspective view showing a state in which the blocking film is installed

Fig. 26 is a perspective view showing a raced state

<Explanation of symbols on main parts of the drawings>

1: Blower 10,10 ': Case

11: support bracket 20: outdoor unit side heat exchanger

30: control box 200: Hall sensor

300: tab housing assembly 40: fan housing

410a, 410b: Air intake G: Grill

430: forming part 44: shroud

440a: Fastening surface 440b: Guide surface

46: damping pad 50: sirocco fan

52: blade 54: abacus

56: bushing 560a: base portion

560b: hub part 560c: bolt fastener

58: Rivet 6: BLDC motor

60: rotor 60a: rotor frame

602: bottom 602a: hub portion

602b: Through Hole 602c: Cooling Fin

602d: Through air 602e: Embossing part

602f: Drainage hole 602g: Positioning hole-rotor

602h: Fastener-rotor 604: side wall

604a: bending portion 604b: bending portion

60b: magnet 65: stator

65a: spiral core 652a: base

654a: Teeth 656a: Home

65b: Insulator 650b: Insulator Upper

651b: Insulator lower 655b: Fastening part

656b: Positioning protrusion 657a: Core rivet

65 ': Stator 65a': Split core

65 ": Stator 65a": Tong core

68: shaft 680: serration

680a, 680b: Shaft side step 685: Planar section

69a, 69b: bearing 70: rotor bushing

72: fitting part 720: serration

74: fastening part 740: engaging projection for positioning

742: fastening through hole 76a, 76b: reinforcing rib

80: supporter 82: bearing housing

822a, 822b: Supporter side step 84: Stator fixing part

842: positioning groove 844: through hole

86: Supporter fixing part 88a, 88b, 88c: Reinforcing rib

90: damping member 920a: main body

920b: head 95: cover bracket

4000: Plug member 900: Racing seal

910: blocking film

The present invention relates to an air conditioner, and in particular, to provide an air conditioner having a blower that can increase the blowing efficiency and heat exchange efficiency by employing a stable and high efficiency BLDC motor.

In general, air conditioners are devices that are widely used for ventilation, air conditioning or other purposes in factories and homes.

Referring to the structure and operation of the existing blower that is applied to a lot of such air conditioners.

The air conditioner is divided into a separate air conditioner installed in the indoor and outdoor space separately from the indoor unit and the outdoor unit, and an integrated air conditioner installed through the window or the wall by combining the indoor unit and the outdoor unit as a single device. As the size of the indoor unit and the outdoor unit increases as the size increases, a separate air conditioner is used because the vibration generated in the outdoor unit is large as the compressor included in the outdoor unit is operated.

Such a separate air conditioner is installed indoors so that the heat exchange action between the low-temperature low-pressure gas refrigerant and the air to provide a hot air or cold air into the air conditioning space, and is installed outdoors to achieve a sufficient heat exchange operation in the indoor unit The outdoor unit is configured to compress, condense, and expand the refrigerant so that the indoor unit and the outdoor unit are installed to be connected to each other by a refrigerant pipe.

Here, the indoor unit is an indoor case formed with an inlet and discharge port for indoor air intake and discharge, and an evaporator is installed inside the interior case so that a low-temperature low-pressure gas refrigerant passes through the heat exchange action with the air, one side of the evaporator Installed in the indoor air passes through the evaporator is made of an indoor fan and a motor to discharge the cold air back to the indoor side.

The outdoor unit includes an outdoor case having an inlet and a discharge port through which outdoor air is sucked and discharged, a compressor installed inside the outdoor case to compress the refrigerant passing through the evaporator into a gas refrigerant having a high temperature and high pressure, and through the compressor. A condenser for condensing a refrigerant with medium-temperature high-pressure liquid refrigerant by exchanging heat with outdoor air, an expansion means such as a capillary tube or an electronic expansion valve for reducing the refrigerant passing through the condenser with a low-temperature low-pressure gas refrigerant, and one side of the condenser It is composed of an outdoor fan and a motor which is a kind of axial flow fan to allow the outdoor air to pass through the condenser, the motor is applied to the general single-phase and three-phase induction motor, the induction motor is a shaft and in the middle of the stator installed inside the housing As alternating current is applied to the stator in such a way that the rotor rotates, the rotating magnetic field It is thereby rotate the rotor.

Usually, the outdoor case is formed in the three inlet side in order to reduce the blowing efficiency, the discharge port is formed on the upper surface, when operating the outdoor fan, the air is sucked from the three sides to heat exchange, then to the upper surface The heat exchanged air is discharged.

At this time, the compressor, the condenser, the expansion means, the evaporator is installed to be connected to each other by a refrigerant pipe, the refrigerant is circulated while being sequentially compressed, condensed, expanded, evaporated along the component.

However, such a conventional outdoor unit for an air conditioner has been limited in the installation place due to the high density of the city and the strengthening of environmental management, and has been the subject of complaints around by the noise and heat emission. In particular, common residential facilities, such as large apartment complexes, require outdoor units to be installed inside the veranda due to aesthetics and noise problems.

Therefore, in recent years, the outdoor unit for the air conditioner of the front suction system, which sucks and heats the air only to the front and then discharges the heat exchanged to the front, has been adopted in a common residential facility such as a large-scale apartment complex.

However, the outdoor unit for the air conditioner of the front suction method as described above has a problem in that the blowing efficiency and the heat exchange efficiency are lowered because the suction area less air is sucked than the outdoor unit for the air absorber of the three-side suction method.

In addition, the conventional blower applied to the outdoor unit for the air conditioner as described above, since the general single-phase or three-phase induction motor is applied to drive the blower fan, such an induction motor has a low efficiency of 40 to 50% or less as a whole. In particular, the range in which the torque characteristic, which is a rotational force, is stable, is narrow, and thus the range of the variable speed is limited, and thus, when the rotational speed leaves the stable torque, there is a problem that abnormal noise and efficiency are lowered.

The present invention has been made to solve the above problems, by adopting a BLDC motor that can increase the blowing amount while driving the blowing fan stably, blower apparatus that can reduce the noise and increase the blowing efficiency and heat exchange efficiency The purpose is to provide an air conditioner having a.

According to one embodiment of the present invention for achieving the above object, a compressor for compressing a refrigerant having passed through an indoor unit, a condenser for condensing the refrigerant passing through the compressor with ambient air, and a blower installed inside the fan housing. A stator comprising a fan, a shaft axially connected to the blower fan, a supporter fixed to the fan housing, a core and a coil, and a rotor and a BLDC motor together with the rotor, are installed to be rotatable outside the stator. A rotor comprising a frame and a magnet installed on the inner side thereof, and interposed between the rotor and the shaft to transfer the rotational force of the rotor to the shaft, characterized in that it comprises a rotor bushing installed into the rotor frame A harmonic is provided.

On the other hand, according to another aspect of the present invention for achieving the above object, a compressor for compressing the refrigerant passing through the indoor unit, a condenser for condensing the refrigerant passing through the compressor with the ambient air, installed in the fan housing A blower fan, a shaft axially connected to the blower fan, bearings supporting both sides of the shaft, a stator constituting a BLDC motor together with a rotor, and rotatable outside the stator. And a rotor including a rotor frame and a magnet installed on an inner side thereof, and a supporter for supporting the stator and bearing, wherein one of the bearings is positioned inside the blower fan. do.

On the other hand, according to another aspect of the present invention for achieving the above object, a compressor for compressing the refrigerant passing through the indoor unit, a condenser for heat-condensing the refrigerant passing through the compressor with the ambient air, inside the fan housing A stator comprising a blower fan installed therein, a shaft axially connected to the blower fan, a supporter fixed to the fan housing, a core and a coil, and a rotor and a BLDC motor together with the rotor, and rotatably installed outside the stator. It is configured to include a rotor having a rotor frame and a magnet installed on the inner side of the bowl shape, the rotor frame is provided with an air conditioner characterized in that the thickness is formed in the range of 1.2 ~ 2.5mm .

On the other hand, according to another aspect of the present invention for achieving the above object, a compressor for compressing the refrigerant passing through the indoor unit, a condenser for condensing the refrigerant passing through the compressor with the ambient air, installed in the fan housing And a stator constituting the BLDC motor together with a rotor, a shaft axially connected to the blower fan, a supporter fixed to the fan housing, a core, a coil, and an insulator surrounding the core, and a rotor together with the rotor. Rotor is installed on the rotatable frame, the rotor frame having a bowl shape and a magnet installed on the inner side of the bowl frame, the insulator of the stator has a surface protruding further up and down than the wound coil surface An air conditioner is provided.

On the other hand, according to another aspect of the present invention for achieving the above object, a compressor for compressing the refrigerant passing through the indoor unit, a condenser for condensing the refrigerant passing through the compressor with the ambient air, installed in the fan housing And a stator constituting a BLDC motor together with a rotor, a shaft axially connected to the blower fan, a supporter fixed to the fan housing, a core and a coil, and a rotor together with a rotor, and being rotatable outside the stator. It is provided with an air conditioner, characterized in that it comprises a rotor having a magnet that is integrally installed with the back yoke and the rotor frame forming a bowl shape.

Further, according to another aspect of the present invention for achieving the above object, a stator comprising a blower fan, a shaft axially connected to the blower fan, a core and a coil, and together with a rotor to form a BLDC motor, The air conditioner is provided to be rotatable on the outside of the stator, and comprises a rotor having a substantially bowl-shaped rotor frame and a magnet installed on the inner side of the stator separately from the back yoke.

Further, according to another aspect of the present invention for achieving the above object, a compressor for compressing a refrigerant passing through the interior of the chamber, a condenser for condensing the refrigerant passing through the compressor by ambient air, and inside the fan housing A stator having a blower fan installed in the blower fan, a shaft axially connected to the blower fan, a supporter fixed to the fan housing, a core and a coil, and a rotor and a BLDC motor together with a rotor, and rotatable outside the stator. It is provided, the air conditioner is characterized in that it comprises a rotor having a substantially bowl-shaped rotor and a magnet having a magnet and a back yoke installed on the inner and outer surfaces of the rotor frame, respectively.

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

1 is a perspective view showing a blower for the air conditioner of the present invention, Figure 2 is a reference perspective view showing a state in which the assembly of the BLDC motor and the supporter from the fan housing and the blowing fan, Figure 3a is a blower according to the present invention 3 is a cross-sectional view of the motor and the supporter of FIG. 3A.

On the other hand, Figure 4a is a perspective view of the supporter of Figure 3a, Figure 4b is a bottom perspective view of Figure 4a, Figure 5 is a partial perspective view showing a state in which the damping member is assembled to the supporter fixing portion of the supporter.

6A is a perspective view showing the appearance of the sirocco fan of FIG. 3A, FIG. 6B is a plan view of 6A, FIG. 7A is a partial cutaway perspective view of the rotor of FIG. 3A, and FIG. 7B is a bottom perspective view of FIG. 7A.

8A is a perspective view of the rotor bushing of FIG. 3A, FIG. 8B is a bottom perspective view of FIG. 8A, and FIG. 9 is a perspective view of a “C” magnet.

10 is a perspective view of the stator of FIG. 3A, FIG. 11 is an exploded perspective view of FIG. 10, and FIG. 12 is an enlarged view of the core of FIG. 11, showing a spiral core.

The blower device 1 of the present invention includes a fan housing having an outer case 10, air inlets 410a and 410b fixed to the inside of the outer case 10 and formed in the upper and lower directions, respectively, and an air outlet formed forwardly. 40, a sirocco fan 50, which is a centrifugal fan installed inside the fan housing 40, and a shaft connected to the sirocco fan 50 to transfer a driving force of a motor to the sirocco fan 50 ( 68, a bearing 69a, 69b for supporting the shaft 68, and a supporter fastened to an upper surface of the fan housing 40 to support the bearings 69a, 69b, and the stator 65. 80, an insulating rotor bushing 70 coupled to an end opposite to the fan connection part of the shaft 68, and a rotor bushing 70 coupled to the rotor bushing 70 to drive a driving force through the shaft bushing 70. To the rotor 60 and the rotor 60 to form a BLDC motor 6 together with the rotor 60. Value and is configured to include a stator 65 that is fixed so that the concentricity is held on the supporter 80.

Then, each surface of the outer case 10 corresponding to the air outlet port and the air intake ports 410a and 410b of the fan housing 40 is opened, and the dog corresponding to the air outlet side of the fan housing 40 is opened. The grille G is installed on the side.

On the other hand, the fan housing 40, the air inlet 410a is formed on the lower surface, the air inlet 410b that can serve as a through hole for the motor installation is formed on the upper surface spaced a predetermined distance from the lower surface, An air outlet is formed at one side of the side wall surface surrounding the sirocco fan 50 while interconnecting the lower surface and the upper surface. The fan housing 40 is preferably made of a metal plate.

On the other hand, the sirocco fan 50 installed in the fan housing 40 is installed so that its center axis is eccentric with respect to the center line of the upper and lower surfaces of the fan housing 40.

That is, the center line of the upper and lower surfaces of the fan housing 40 and the center axis of the sirocco fan 50 installed therein do not coincide with each other and are spaced apart from each other.

Therefore, as can be seen through Figure 3a, the space between the fan housing 40 and the sirocco fan 50 is different from each other.

A support bracket 11 is provided between the outer case 10 and the fan housing 40 to support the fan housing to the outer case 10.

The support bracket 11 extends integrally from the outer case 10 and is preferably fastened to the upper surface of the fan housing 40. However, the support bracket 11 may be interposed between the outer case 10 and the fan housing 40 as a separate member. It may be.

In addition, a forming unit 430 is formed on the upper surface of the fan housing 40 for strength reinforcement, and the forming unit 430 formed on the upper surface of the fan housing 40 is formed along a circumferential direction.

The forming part 430 formed on the upper surface of the fan housing 40 is formed in a shape in which the width thereof varies in the circumferential direction. That is, the width of the forming unit 430 gradually increases as it comes to a wide portion (outcase front side) of the upper surface of the fan housing 40. (See FIG. 1).

On the other hand, the air inlet 410a of the lower surface of the fan housing 40 and the air inlet 410b, which serves as a through hole for motor installation of the upper surface of the fan housing 40, the shroud 44 for guiding the flow of air introduced therethrough. ) Is provided.

The shroud 44 is a separate member, a guide surface having a predetermined curvature for guiding the fastening surface 440a and the air flow that are fastened around the air inlets 410a and 410b of the upper and lower surfaces of the fan housing 40. Although the case made of 440b is illustrated, the fan housing 40 may be integrally formed with the fan housing 40. In this case, the thickness of the shroud 44 will be thinner than other portions toward the end.

Meanwhile, referring to FIGS. 3A, 3B, and 4, the supporter 80 includes a bearing housing portion 82 in which bearings 69a and 69b for supporting the shaft 68, such as ball bearings, are installed. Is formed so as to extend radially outward of the bearing housing portion 82, between the supporter fixing portion 86 and the supporter fixing portion 86 to fix the supporter 80 to the upper surface of the fan housing 40 It is formed to connect the and comprises a stator 65 fixing portion for providing a surface on which the stator 65 can be fixed, it is preferable that the metal material, such as aluminum, is cast.

That is, the supporter fixing portion 86 of the supporter 80 is triangulated.

The supporter 80 includes a stator fastening end portion of the supporter fixing part 86 such that at least the stator engagement surface of the supporter is located inside the fan housing 40 when the supporter is assembled to the fan housing 40. The fan housing 40 is bent upwardly to be positioned above the surface.

In addition, the supporter 80 is provided with a reinforcing rib 88a for reinforcing the strength of the supporter fixing part 86, and the reinforcing rib 88a is also provided on the outer circumferential surfaces of the stator fixing part 84 and the bearing housing part 82. It is preferred to be connected at the same time.

In addition, the supporter 80 and the stator 65 are provided with corresponding positioning protrusions and positioning grooves 842 that can match concentricity when the stator 65 is fastened to the supporter 80. More specifically, the stator fixing part 84 of the supporter 80 is provided with a positioning groove 842 for determining an assembly position with the stator 65, and positioning projections on the corresponding stator 65. 656b; see FIG. 10. At this time, the positioning projection may be formed in the supporter and the positioning groove may be formed in the insulator of the stator.

On the other hand, a through hole 844 is formed on the surface of the stator fixing portion 84 of the supporter 80 to increase motor cooling performance.

In addition, the step 822a formed at the lower side of the step 822a and 822b formed on the inner circumferential surface of the bearing housing 82 is located at the lower side of the bearings respectively installed at the upper and lower sides of the outer circumferential surface of the shaft 68. It is formed in the shape of the letter "a" to form a structure for supporting the upper end of the lower bearing (69a) to be installed, the stepped jaw formed on the upper side of the step (822a) (822b) formed on the inner peripheral surface of the bearing housing 82 822b is formed in a "b" shape so as to form a structure supporting the lower end of the upper bearing 69b installed on the upper side.

In addition, the mounting positions of the lower bearing and the upper bearing on the shaft 68 are determined in the lower and upper outer peripheral surfaces of the shaft 68 located inside the bearing housing 82 and transmitting the driving force of the rotor 60. Positioning step can be formed to be.

In addition, the bearing housing portion 82 of the supporter 80 is cylindrical and extends a predetermined length or more along the axial direction so that the distance between the bearings 69a and 69b can be installed as far apart as possible. desirable.

On the other hand, in both of the bearings above, the upper bearing 69a located close to the rotor side is preferably provided with bearings having a larger bearing force and diameter than the lower bearing 69b located close to the blowing fan side.

3A, 3B, and 5, it is preferable that a damping pad 46 is provided on the contact surface between the fan housing 40 and the shroud 44.

More specifically, the vibration damping pad 46 is interposed between the fastening surface 440a of the shroud 44 and the peripheral surface of the air inlets 410a and 410b of the fan housing 40 which is in contact therewith. Blocking the transmission to the fan housing (40).

In addition, a damping member 90 is provided between the supporter fixing part 86 and the fan housing 40 of the supporter 80.

Referring to FIG. 5, the vibration damping member 90 is forced through a main body portion 920a contacting the fan housing 40 and a vibration damping member fixing hole 866 formed in the supporter fixing portion 86. The head portion 920b is inserted into and fixed to the supporter fixing portion 86, and a through hole 930 penetrating the main body portion 920a and the head portion 920b is provided.

When the supporter 80 is fixed to the fan housing 40 side, the head portion 920b of the vibration damping member 90 is connected to a fastening member such as a bolt 15d passing through the vibration damping member 90. It is preferable that the cover bracket 95 made of a metal material such as an iron plate is prevented from being damaged by the damping member 90 generated by the acting fastening force.

The cover bracket 95 refers to an iron piece shaped like a horseshoe so as to wrap the head portion 920b.

That is, the vibration damping member 90 pushes the head portion 920b through the vibration damping member fixing hole 866 formed in the supporter fixing portion 86 to force the body portion 920a and the head portion 920b. The neck portion to be connected is fixed by being caught around the damping member fixing hole 866. In such a state, the cover bracket 95 is put on the head 920b, and then the bolt 15d passes through the through hole 930 of the cover bracket 95 and the vibration damping member 90. The fan housing 40 When it is fastened to the supporter 80 is fixed to the fan housing 40.

3A, 3B, 6A, and 6B, the sirocco fan 50 is provided with a main plate 54 that connects each blade 52 formed along the circumferential direction to the inside of the fan. 54) The central portion includes a bushing 56 for fastening the shaft 68 to the sirocco fan 50.

At this time, the lower portion and the upper portion of the blade 52 is provided with fixing plates 53a and 53b that bind individual blades to each other to prevent blade flow and noise caused by the high speed rotation of the fan.

The bushing 56 has a disc-shaped base portion 560a which is in close contact with the surface of the main plate 54, and protrudes in the axial direction at the center of the base portion 560a, and has a shaft 68 insertion hole at the center thereof. It consists of a hub portion 560b provided.

The bushings 56 are two pieces, which are coupled to each other by riveting or screwing by the rivets 58 in close contact with both sides of the main plate 54.

The main plate 54 is provided at a position close to the motor side from the longitudinal center point of the sirocco fan 50.

The reason for doing this is because a large amount of air flows from the air inlet 410a opposite to the side where the motor is installed among the air inlets 410a and 410b of the fan housing 40.

Here, the position of the main plate 54 is the shorter length from the main plate 54 to the end of the fan and the longer length from the main plate 54 to the end of the fan when the full length of the sirocco fan 50 is divided. Preferably, the length ratio falls within the range of 1: 1.3 to 1: 2.

In addition, at least one bolt fastening hole 560c is provided on the outer circumferential surface of the hub portion 560b of the bushing 56, and on the outer circumferential surface of the end portion of the shaft 68, the bolt fastening hole 560c passes through when assembled. A planar section 685 to which the pressing force of the bolt 15f to be fastened is applied is provided.

During assembly, as the compression force of the bolt is applied to the planar section 685, the sirocco fan 50 is firmly coupled to the shaft 68 to rotate integrally.

Meanwhile, referring to FIGS. 3A and 3B, the rotor bushing 70 is coupled to the shaft 68 and the rotor frame 60a in a state located below the rotor frame 60a (that is, inside the rotor frame). As can be seen, the rotor bushing 70 may be coupled to the shaft 68 and the rotor frame 60a in a state located above the rotor frame 60a (that is, outside the rotor frame).

8A and 8B, the rotor bushing 70 includes a fitting portion 72 in which a shaft 68 is fitted in the center thereof, and an engagement portion 72 for engaging with the rotor frame 60a. It is configured to include a fastening portion 74 is formed to extend in the radial direction around).

At this time, the coupling portion 74 of the rotor bushing 70 is formed with a positioning engaging projection 740 integrally protruding toward the rotor frame 60a in a plurality of places.

In addition, the fastening portion 74 of the rotor bushing 70 is provided with a fastening hole 742 for fastening the bolt with the rotor frame 60a.

Reinforcing ribs 76a and 76b are provided at the engagement portion 72 and the fastening portion 74 of the rotor bushing 70, respectively.

In addition, serrations 680 and 720 for mutual engagement are formed on the outer circumferential surface of the upper end of the shaft 68 and the inner circumferential surface of the center portion of the fitting portion 72 of the rotor bushing 70 corresponding thereto.

That is, the rotor bushing 70 is fastened to the rotor frame 60a by a fastening member such as a bolt 15a passing through the fastening hole 742 of the fastening portion 74, and through the center of the fitting portion 72. The shaft 68 inserted and serrated to the rotor bushing 70 is fastened to the rotor bushing 70 by a bolt 15b inserted into a fastening hole at an end thereof.

On the other hand, the rotor bushing 70 is made of a resin material that is different from the rotor frame 60a of the steel plate vibration mode.

In addition, the rotor bushing 70 is made of an electrically insulating resin material, and may be formed integrally with the rotor frame by insert injection.

3A, 3B, 7A, and 7B, the rotor 60 includes a rotor frame 60a and a magnet 60b installed therein, and the rotor frame is in a substantially bowl shape. 60a is preferably made of an iron sheet in consideration of productivity and moldability.

However, the present invention is not limited thereto, and the rotor frame 60a may be made of an injection molding, or may be made of an injection molding of a resin material surrounding the iron plate and its outside.

In addition, the rotor frame 60a includes a bottom surface 602 forming a substantially disk shape and a side wall surface 604 extending in a direction substantially perpendicular to an edge of the bottom surface 602, wherein the side wall surface On the 604, a bent portion 604a having a seating surface for supporting the magnet 60b mounted on the inner surface thereof is formed along the circumferential direction, and the rotor 60 at the center of the bottom surface 602. Hub portion 602a having a through hole 602b through which a fastening member such as a bolt 15b for coupling the shaft 68 to the shaft 68 is provided.

On the other hand, the rotor frame (60a) comprises a bottom surface 602 forming a substantially disk-shaped, side wall surface 604 extending in a direction substantially perpendicular to the edge of the bottom surface 602, iron plate In the case of a material, the bottom surface 602 and the side wall surface 604 are integrally formed by press working.

At this time, the end of the opening of the side wall surface 604 is first bent in the radially outer side, the end is formed in a second bent shape again, the second bending direction of the side wall surface 604 is the bottom surface ( 602).

As described above, the bent portion 604b formed at the opening side end of the side wall surface 604 of the rotor frame 60a increases the rigidity of the rotor side wall surface 604 and thus prevents the distortion of the rotor and the noise caused by the high speed rotation. Will be prevented.

In addition, around the hub portion 602a of the rotor frame 60a, a plurality of air blows air toward the stator 65 when the rotor 60 rotates to cool the heat generated by the stator 65. Cooling fins 602c are formed radially, and the cooling fins 602c are formed to have a predetermined length in the radial direction.

On the other hand, the cooling fin 602c is formed to face the opening side of the rotor 60 by the lancing process, the through hole 602d formed by the lancing process serves as a vent.

The cooling fins 602c are bent at an angle of 90 ° with respect to the bottom surface 602 so as to face the opening side of the rotor 60.

On the other hand, the cooling fins may protrude toward the opposite side of the blowing fan, not the opening side of the rotor.

In addition, the rotor frame is formed in a thickness of 1.2 ~ 2.5mm range, more preferably formed of 2mm.

On the other hand, the rotor frame of the present embodiment is characterized in that it also serves as a back yoke as the iron plate material, a ring-shaped back yoke may be installed inside or outside the rotor frame, or a laminated back yoke may be installed inside the rotor frame.

The rotor frame may include a steel plate frame forming a rotor frame shape and a ring-shaped iron plate wound around the steel plate frame to reinforce the strength of the steel plate frame.

The rotor frame surface is preferably coated with a zinc coating for rust prevention.

When the back yoke is installed inside or outside the rotor frame, the back yoke may be installed integrally with the magnet or may be installed in a separated form.

On the other hand, the magnet and the back yoke may be installed on the inner and outer surfaces of the rotor frame, respectively. That is, the magnet may be installed on the inner surface of the rotor frame, and the back yoke may be installed on the outer surface of the rotor frame.

An embossing portion 602e for strength reinforcement of the rotor frame 60a is formed in a region between the cooling fins 602c and the cooling fins 602c of the bottom surface 602 of the rotor frame 60a. On the embossed portion 602e, a drain hole 602f for water discharge is formed.

On the other hand, the rotor frame (60a) is made of a resin or iron material, the bushing is made of a resin material, the shaft is made of iron material, the rotor frame and the rotor bushing and the shaft to be integrally formed by insert injection molding, etc. Can be formed.

In addition, the magnet 60b has an individual piece that is arc-shaped as shown in FIG. 7A, or C-shaped (ie, the convex part is approximately C-shaped as shown in FIG. 9). C-shaped magnet 60b ").

On the other hand, the air gap formed between the rotor and the stator to be described later is preferably maintained to 1mm.

Referring to FIGS. 3B and 11 to 13, the stator 65 has an annular shape that forms a multilayer structure while spirally rotating an iron plate formed of a tooth 654a and a base portion 652a from the lowermost layer to the uppermost layer. Spiral core (65a) of the, and wraps the core to be insulated so as to protrude into the core is formed with a fastening hole for fastening the stator 65 to the fan housing 40 by a fastening member such as bolts (15c) And an insulator 65b having a fastening portion 655b, and a coil 65c wound around the teeth 654a of the core.

At this time, the fastening portion 655b of the stator is formed to protrude at least three places inside the core, and the height of the fastening portion 655b forms 20% or more of the total stack height of the core.

This means that, when there is no separate fastening portion in the core as shown in FIG. 11, the fastening portion 655b of the insulator should be formed so that its height is 20% or more of the total core stacking height, and sufficiently endures vibration generated when driving the motor. Because it can.

On the other hand, the fastening hole of the fastening portion 655b, the metal tube (65d) is press-fitted, or having a cut portion cut along the longitudinal direction instead of the metal tube (65d) spring pins that are elastic in the radial direction (not shown) ) Can be installed.

The spiral core 65a is wound in a spiral form from the bottom layer to the top layer to form a multi-layer structure, and a plurality of teeth radially outward from the base portion 652a of the spiral core 65a. 654a is protruded in a radial direction, and the base portion 652a of the spiral core 65a is provided with a rectangular or trapezoidal recessed groove 656a to reduce stress when the core is wound.

In addition, the spiral core (65a) is riveted by a rivet 657a penetrating through the through hole formed in the base portion 652a, the winding start portion and the winding end portion of the spiral core (65a) are in contact with each other It is welded to a predetermined site and joined.

On the other hand, the insulator (65b) is wrapped in the core as assembled and assembled as a separate upper and lower pieces as shown in FIG.

The insulator 65b in the case of being manufactured by separate upper and lower pieces includes an insulator upper 650b coupled to the upper side of the core and an insulator lower 651b coupled to surround the lower side of the core.

On the other hand, the insulator 65b is not made of a separate upper and lower pieces, but may be made at a time by molding, of course, the core is processed in the state inserted into the resin.

On the other hand, the insulator 65b of the stator has a surface protruding further up and down than the wound coil 65c surface.

For example, the rib provided in the tooth portion of the insulator 65b is formed to have a surface protruding more than the coil surface wound on the tooth portion.

In addition, the coil winding part, which is a part of the coil winding in the stator, is positioned so that its vertical length does not deviate between the end of the shaft and the bearing installed on the side opposite to the shaft support bearing installed on the blower fan side (see FIG. 3A).

In addition, the volume of the coil winding of the stator is formed larger than the volume of the space between the coil winding, which is to improve heat dissipation.

In addition, the winding method of the coil wound on the stator is one of a concentrated zone or a distributed zone.

Meanwhile, referring to FIGS. 22 to 24, the present invention is inserted into a gap between each tooth formed on the outer circumferential surface of the stator 65 'to fill a gap between the teeth to block noise generation due to the gap ( 4000 may be further provided.

In this case, the plug member 4000 may be integrally formed inside the hub part so as to correspond to the hub part 4100 seated on the upper surface of the stator and the fastening rib part of the stator for fixing the stator to the tub rear wall part. It comprises a fastening rib portion 4200 is formed, and the plug tip 430 is formed integrally to be spaced apart by a predetermined interval along the circumferential direction on the outer surface of the hub portion and to fill the gap between the teeth of the stator. .

If the plug member 4000 is not installed in the stator and there is a gap between the teeth of the stator 7, the air of each tooth gap is released into the space between the rotor and the stator due to the pressure difference when the motor is driven. When the bursting sound is collided with the flowing air, the bursting sound frequency and the natural frequency of the rotor or stator coincide with the resonance sound, thereby amplifying the noise.

However, in the present invention, since the plug member 4000, which is a non-magnetic structure that can fill the gap between the teeth of the stator, is provided, stagnant air is present in the space between the teeth formed in the stator 7. By not doing so, noise is prevented.

In addition, the plug tip may be in the form of completely filling the gap between the teeth, if the form of blocking the entrance of the tooth may be a form that does not completely fill the internal space, rather, such a structure is more suitable for heat dissipation of the stator Will be advantageous.

Meanwhile, as shown in FIG. 25, a blocking film 910 is provided outside the stator 65 ′ to shield the gap between the teeth, and thus the permanent magnets and stator of the air and the rotor stagnated in the gap between the teeth of the stator. It is also possible to prevent friction with the air flowing along the spaces between the teeth.

At this time, the blocking film 910 is a non-magnetic material, preferably has a ring-shaped structure surrounding the entire tooth outer surface of the stator, this blocking film also has the same effect as the plug member 4000.

In addition, the blocking layer 910 may have a structure separated into unit pieces to individually block each tooth gap.

On the other hand, as shown in Figure 26, unlike the above embodiments, the teeth of the stator, the lacing (lacing) so that the core teeth (stitch) of the stator may be tied to each other can also reduce the vibration noise of the coretis .

At this time, the lacing treatment is performed by a non-magnetic lacing yarn 900, for example, a polyester thread (Polyester thread).

In this case, the coreis constituting the stator of the non-ELD motor is subjected to the racing process, and the racing chamber 750 serves to hold the coreis so that the vibration of the coreis due to the polarity change when the motor is driven is resonated. In addition to preventing the occurrence of peak noise by the noise, it is possible to reduce the level of overall noise.

Operation and blowing process of the blower of the present invention configured as described above is made as follows.

When a current flows sequentially through the coil 65c of the stator constituting the BLDC motor 6 through a tap housing assembly 300 for power connection, the rotor 60 rotates, and the rotor 60 is rotated. The rotor bushing 70 coupled to the serration coupled shaft 68 is rotated, so that power is transmitted to the sirocco fan 50 through the shaft 68 to rotate the sirocco fan, the fan housing (10) Air sucked through the upper and lower air inlets 410a and 410b is discharged through the discharge port O on the front of the outer case 10.

Specifically, as the current is applied to the coil 65c of the stator 65 constituting the BLDC motor 6, mutual electromagnetic force is generated between the stator 65 and the magnet 60b, the sensor (60b) ) By detecting the position of the current and sequentially flowing current to the coil 65c of the stator 65 so that mutual electromagnetic force is continuously generated between the stator 65 and the magnet 60b. The rotor 60 fixed to the magnet 60b rotates and the shaft 68 coupled thereto rotates to transmit the rotational force to the sirocco fan 50.

At this time, the BLDC motor 6 can be operated at various rotational speeds because the torque characteristic is stable, and can be operated at a stable speed, thereby reducing noise generation and further reducing power consumption.

The sensor for controlling the motor in the above is applied to the Hall sensor 200, the Hall sensor may be installed between the magnet and the stator, or may be installed outside the magnet.

In other words, the air conditioner 1 of the present invention, when the sirocco fan 50 by the BLDC motor 6 is rotated, the outside air is sucked into the lower air inlet 410a of the fan housing 40 at the same time a part of the After being sucked into the upper air inlet 410b of the fan housing 40 and discharged in the circumferential direction, the fan housing 40 is guided by the fan housing 40 to exit through the outlet O of the outer case 10.

On the other hand, the operation and effect of the blower of the present invention is as follows.

First, since the blower device 1 of the air conditioner according to the present invention is applied to the BLDC motor 6 which is stable at the most rotational speed and maintains high efficiency in order to drive the blowing fan, the BLDC motor while varying the rotational speed in various ways. It is possible to drive, and stable at all rotational speed is made at the same time high efficiency operation has the advantage of reducing noise and power consumption at the same time.

In addition, the blower (1) according to the present invention can effectively install the BLDC motor (6) to the side where the suction air flow rate of the fan housing is small by using a separate supporter 80, and a part of the BLDC motor is the fan By installing to be inserted into the housing 40 there is an advantage that can reduce the size of the overall blower.

In addition, since the blower 1 according to the present invention has a direct motor structure, noise and failure, power loss is reduced, and since the bearing housing is made of metal, there is no thermal deformation, thereby increasing the reliability of the product.

In addition, the blower 1 of the present invention, the rotor 60 is a steel plate structure and can be manufactured by press molding, so the moldability is excellent, the time required for manufacturing is very short, and the productivity is improved.

Meanwhile, the blower 1 according to the present invention has a bent portion 604a having a magnet 60b seating surface on a sidewall surface 604 extending vertically from the edge of the bottom surface 602 of the rotor frame 60a. Is formed along the circumferential direction, when the magnet (60b) is attached to the inner surface of the rotor is made stable support of the magnet (60b) by the seating surface, the production of the rotor (60) is made easy.

In addition, a plurality of cooling fins 602c are formed around the hub portion 602a of the rotor frame 60a so as to have a radial length and a predetermined length in a radial direction, so that the cooling fins when the rotor 60 is rotated. 602c blows air toward the stator to cool the heat generated by the stator 65.

The cooling fin 602c is formed to face the opening side of the rotor 60 by a lancing process, and the through hole 602d formed by the lancing process serves as a vent.

In addition, since the iron plate 60 is easily molded at a time by press working, the time required for manufacturing the rotor becomes very short, and productivity can be improved.

In addition, the rotor 60 has a form in which the end of the opening of the side wall surface 604 of the rotor frame 60a is firstly bent radially outward, and the end thereof is secondly bent in the direction of the bottom surface 602, so that the rotor Increasing the rigidity of the frame (60a) serves to prevent the distortion of the rotor (60) generated during high-speed rotation and the resulting noise in advance.

In addition, in the region between each cooling fin 602c and the cooling fin 602c of the bottom surface 602 of the rotor 60, the embossing portion 602e improves the overall strength of the rotor 60, and the embossing The drainage hole 602f formed in the part 602e enables the discharge of water to the outside of the motor.

And, the rotor bushing 70 of the present invention is injection molded as a resin material, the vibration mode is different from the rotor frame (60a) made of iron plate so that the vibration of the rotor 60 is attenuated to be transmitted to the shaft (68). do.

Further, in the present invention, by adopting a spiral core 65a having an easy winding structure, it is possible to prevent waste of the base material and to increase the ease of manufacture, and the rigidity of the stator fixing part 84 of the supporter 80 can be improved. Increase noise, reduce vibration and improve mechanical reliability and extend life.

That is, the recess groove 656a formed in the base portion 652a of the spiral core 65a constituting the stator 65 reduces the stress during winding of the core, thereby helping the winding operation to be easily performed with a smaller force.

11, since the fastening portion 655b of the resin insulator 65b is formed so that its height is 20% or more of the total core stacking height, even if the metal core is not located at the fastening portion. Sufficient rigidity is provided to prevent damage to the fastening portion 655b due to vibration generated when the motor is driven.

In particular, the height of the fastening part 655b is most preferably formed to be the overall height of the stacked cores.

The height of the fastening part 655b may be equal to or greater than the total height of the stacked cores. However, when the height of the fastening part 655b becomes too large, the overall height of the driving part of the blower becomes large, which is disadvantageous in compacting the blower. In consideration of this, the height of the fastening part 655b is preferably not more than twice the height of the entire core stack.

In addition, the positioning protrusions 656b formed on the fastening part 655b are joined to the positioning grooves 842 of the supporter 80 to facilitate the fastening of the stator 65.

That is, the present invention is provided with a rotor bushing 70 made of a resin material different from the rotor frame 60a and the vibration mode to ensure insulation performance and to reduce the vibration transmitted from the rotor to the shaft 68, the stator Not only 65 is firmly supported by the supporter 80, but the concentricity maintenance of the stator is effectively performed.

In addition, the blower (1) of the present invention is made of a low-cost metal plate while the fan housing 40 is heat-resistant, thereby making it low cost and good manufacturability.

In addition, the blower 1 of the present invention, because the supporter 80, which is a bearing support means, is made of metal such as aluminum alloy, there is no thermal deformation even at a high temperature.

In addition, the blower 1 of the present embodiment is because the BLDC motor 6 is installed on the air inlet 410b of the air inlet 410a, 410b of the fan housing 40 with a relatively small suction flow rate. In addition to minimizing the suction flow resistance, it is possible to increase the blowing efficiency by enabling stable operation with high efficiency.

In addition, according to the present invention, since the rotor and the stator can be inserted and fixed from the top to the bottom of the shaft, workability is improved when disassembling and assembling parts during an assembly line or after service.

17 is a perspective view showing another type of supporter 80 ', which is slightly different from that shown in FIGS. 5A and 5B, but the basic configuration is the same.

In this case, one form of the reinforcing ribs is different from the reinforcing ribs of FIGS. 5A and 5B, and it can be seen that the position where the reinforcing ribs 88a are formed is also different among the reinforcing ribs.

That is, FIGS. 5A and 5B show a case in which only one reinforcing rib 88a is formed at the center position on the stator fixing part 84 surface, but FIG. 17 shows that the reinforcing rib 88a is on the supporter fixing part 86 surface. It can be seen that the case is formed in the form facing each other on both sides of the edge.

In addition, although the specific example is not shown, the supporter is formed by a bearing housing portion 82 in which the bearing for supporting the shaft 68 is installed therein and a radial extension on an outer circumferential surface of the bearing housing portion 82. It may be made only of the stator fixing portion 84 to be fixed to the upper surface of the fan housing 40, and to fix the stator on the opposite side.

That is, in this case, as the stator fixing portion 84 is extended to the supporter fixing portion, the existing supporter fixing portion 86 will form a disc shape rather than a change in shape.

Meanwhile, the upper bearing 69a (see FIG. 3A) of the shaft support bearing is located inside the blower fan.

FIG. 13 is a perspective view showing another example of a stator applicable to the present invention, and FIG. 14 is a perspective view illustrating a split core as an example of the core structure of FIG. 13. In the case of the stator 65 'of FIG. As the core, a split core is applied instead of the spiral core 65a.

The split core 65a 'is made by forming an iron plate composed of a tooth 654a and a base 652a in a divided form along a circumferential direction on a base material, and then welding the divided core pieces by connecting them together. Core.

W in the figure indicates a welded part.

In this case, although the insulator 65b of the assembled type is shown as a separate piece, the core may be insert-molded as shown in FIG. 15 so that the insulator completely surrounds the core.

FIG. 15 is a perspective view showing still another example of the stator applicable to the present invention, and FIG. 16 illustrates the core structure of FIG. 15. In the case of the stator 65 ″ shown in FIG. Instead of the core 65a or the split core, an iron plate composed of the teeth 654a and the base portion 652a shows that a tubular core 65a ", which is connected in a circumferential direction without any break, may be applied. Is as shown in FIG.

In FIG. 15, the core is insert-molded so that the insulator completely surrounds the core. However, in this case, the insulator in the form of being assembled with each other as a separate piece may be applied.

On the other hand, in the above embodiment, the sirocco fan 50 is crimped to the flat section 685 formed on the outer peripheral surface of the end portion of the end of the bolt 68 passing through the bolt fastening hole 560c of the bushing 56 As it is fastened rotatably together with the shaft 68, it is not necessarily such a fastening structure can couple the sirocco fan 50 to the shaft 68.

Although not shown, the central portion of the main plate 54 and the shaft 68 of the sirocco fan 50 in the same construction principle that the rotor bushing 70 and the shaft 68 penetrating the center thereof are fastened to each other by bolts 15b. The sirocco fan 50 and the shaft 68 may be fastened to each other by bolts penetrating the end surface of the backplane.

Hereinafter, the outdoor unit for the air conditioner of the front suction method using the blower 1 having the above-described configuration will be described with reference to FIGS. 18 to 20 together with the drawings of the above-described embodiment.

18 to 20 is a partially cutaway perspective view and an exploded perspective view and a front view showing the installation state of the air conditioner outdoor unit of the front suction method according to the present invention, the outdoor unit of the air conditioner of the front suction method according to the present invention, Figure 18 20, various components are installed in the case 10 ′ formed to open the front surface, and the outdoor unit of the front suction method is installed on the outer wall 2 of the residential and / or commercial building. It is installed in the formed inner wall of the rectangular shape.

Specifically, the outer frame 4 is fixedly installed on the inner wall of the space formed on the outer wall 2 of the building, the inner frame 5 inside the outer frame 4 is fixed to the outer frame 4 ( In some cases, the inner and outer frames 4 and 5 may be integrally formed, and the inner region of the inner frame 5 may be partitioned vertically into the suction region 7a and the discharge region 7b. The intermediate separator 9 is installed to cross the middle, and a plurality of louver blades 8 are installed in each region to allow air to be sucked in or discharged through the gaps between the louver blades 8, and the inner frame (5) An outdoor unit is installed to be in close contact with the inside, and a sealing member S is provided between the inner frame 5 and the outdoor unit to prevent air leakage and to cushion vibration.

The outdoor unit for the air conditioner of the front suction and discharge system installed as described above is formed with a suction port I and a discharge port O so as to be partitioned with each other at the lower side and the upper side of the open front of the case 10a, and inside the suction port I. A compressor (not shown) and a heat exchanger 20 for compressing and condensing a refrigerant are installed. A blower 1 is built in the discharge port O to blow air, and in particular, the blower ( 1) is a blowing fan inside the fan housing 40 fixedly installed inside the discharge port O, a sirocco fan 50 which is a kind of centrifugal fan is installed, and is connected to the sirocco fan to rotate the sirocco fan 50. The BLDC motor 6 to be driven is installed to be fixed to the fan housing 40 by a separate supporter 80.

Here, the case 10a is formed with a suction part 11a and a discharge part 11b inside the suction port I and the discharge port O so as to correspond to the suction area 7a and the discharge area 7b, respectively. In order to prevent invasion of a large sized foreign substance, a bee, an animal, etc., the grille G is preferably provided at each of the suction port I and the discharge port O on the open front surface.

For reference, the case 10a is not only considering the front suction, but also considering the installation of a heat exchanger, etc., so that the structure may be slightly different from the case 10 of the blower described above.

In addition, the case 10a is installed in the suction part 11a and the discharge part 11b such that various components such as the compressor and the heat exchanger 20 are fixed to brackets (not shown) of various shapes. The case 10a is installed such that an open front circumferential portion is in close contact with the sealing member S inside the inner frame 5.

Of course, the compressor and the heat exchanger 20 are installed to be connected by the indoor unit side heat exchanger (not shown) and the refrigerant pipe, and in addition, expansion means (not shown) such as a capillary tube or an electronic expansion valve are also used as the outdoor unit side heat exchanger. The refrigerant is installed between the indoor unit and the indoor unit by a refrigerant pipe, and the refrigerant is circulated along the refrigeration cycle consisting of the compressor, the outdoor unit side heat exchanger 20, the expansion unit, and the indoor unit side heat exchanger. The space installed in the indoor unit is cooled while expanding and evaporating.

At this time, the outdoor unit side heat exchanger 20 is provided with a plurality of cooling fins 602c in a state in which a plurality of refrigerant pipes are arranged to be bent, and configured to be bent in a 'U' shape to form a suction part of the case ( The control box 30 is installed at 11a), and the compressor is installed at the inside thereof, and the control box 30 for controlling the operation of various components included in the outdoor unit is installed at the rear side of the compressor.

In addition, the blower 1 is fixedly installed above the outdoor unit side heat exchanger 20, and the sirocco fan 50 and the BLDC motor 6 are connected to each other, and then the supporter 80 is used. And fixedly installed so that the sirocco fan 50 and the BLDC motor 6 are embedded in the fan housing 40, and the fan housing 40 is located at the discharge part 11b of the case 10a. It is installed to be fixed by a separate fixing bracket (not shown) on the outdoor unit side heat exchanger 20.

Specifically, the sirocco fan 50 is a kind of centrifugal fan that sucks air in the axial direction and discharges it in the circumferential direction, and the air volume is increased relatively compared to the axial fan.

And, the structure of the sirocco fan 50 follows the structure of the above-described embodiment.

Next, the fan housing 40 has air inlets 410a and 410b on the top and bottom surfaces thereof, respectively, so as to suck air passing through the outdoor unit side heat exchanger 20 in the axial direction of the sirocco fan 50. Is formed, and each air inlet 410a, 410b is preferably provided with a shroud 44 to guide the air sucked into the sirocco fan 50, the circumference of the sirocco fan 50 The air outlet is formed in the front surface to discharge the air in the direction.

At this time, the air outlet of the fan housing 40 is in communication with the outlet (O) of the case (10a).

On the other hand, the BLDC motor 6 uses a drive circuit instead of a brush in converting alternating current into a direct current, and since there is no brush, spark does not occur and there is little risk of gas explosion, and at most rotational speeds. Drives stably while maintaining high efficiency of about 70 to 80%, specifically, the shaft 68 for transmitting power to the sirocco fan 50 and the shaft 68 by generating a rotational force by mutual electromagnetic force to drive the shaft 68 The stator 65 and the rotor 60 and the magnet 60b, and the Hall sensor 200 for controlling the current supplied by detecting the position of the rotor 60.

In particular, the BLDC motor 6 is fixed by the supporter 80 on the air inlet 410b side of the upper surface of the fan housing 40 having a relatively small suction flow rate in order to reduce the suction flow resistance.

In detail, the shaft 68 is installed to be supported by the supporter 80 by bearings 69a and 69b such as ball bearings so as to be rotatable in a state of passing through the supporter 80 and the end thereof is the sirocco. The center of the fan 50 and the upper shaft center of the sirocco fan 50 are connected to each other by a method such as bolting or caulking, and the stator 65 is spaced apart from the outer edge of the shaft 68 by the supporter ( 80) to be fixed.

In addition, the rotor 60 is the outer diameter portion is located on the outer periphery of the stator 65 and the inner diameter portion is fixed to the shaft 68, so that even if centrifugal force is generated on the bottom surface of the rotor to reinforce strength A plurality of ribs or embossing portions are formed in the radial direction, and the permanent magnets 68 may generate mutual electromagnetic force with the stator 65 at the outer diameter portion of the rotor 60 at predetermined intervals in the circumferential direction. It is fixed so as to be installed, the Hall sensor 200 is installed to be fixed to the core side of the stator (65).

Therefore, when current flows sequentially through the coil 65c of the stator 65, the rotor 60 is rotated by the mutual electromagnetic force of the current flowing through the coil and the magnet 60b, and the The rotational force drives the sirocco fan 50 to rotate by the shaft 68.

Next, the supporter 80 is installed such that the sirocco fan 50 and the BLDC motor 6 are suspended inside the fan housing 40. Specifically, the shaft 68 is the bearing 69a. A cylindrical bearing housing portion 72 which is arranged to be rotatable by a 69b, and a stator fixing portion integrally formed at an upper end of the bearing housing portion 72 and fixedly installed in a state where the stator 65 is raised ( 84) and a plurality of supporter fixing parts 86 formed to protrude in a radial direction at predetermined intervals on the circumference of the stator fixing part 84 and fixed around the air inlet 410b of the upper surface of the fan housing 40. Is done.

At this time, the bearing housing 72 has a cylindrical shape formed shorter than the shaft 68, and the bearings 69a and 69b are installed inside the upper and lower ends to support the shaft 68 so as to be rotatable. The stator fixing part 84 has a plurality of positioning grooves 842 and fastening holes 846 are formed to be screwed in the state in which the stator 65 is inserted into the upper surface.

In addition, the supporter 80 is preferably three supporter fixing portion 86 is formed while maintaining a 120 ° interval around the bearing housing 82 and the stator fixing portion 84 to distribute the load to support In order to reinforce the strength of the supporter fixing part 86, the bearing housing part, the stator fixing part 84, and the supporter fixing part (to support the lower side of the stator fixing part 84 and the supporter fixing part 86) Reinforcing ribs 88a are formed between the 86, and it is more preferable that a plurality of auxiliary reinforcing ribs 88b and 88c are formed on the upper surface of the supporter fixing part 86.

In particular, the supporter fixing portion 86 is formed to protrude radially from the stator fixing portion 84, and the middle portion is formed to be inclined upward toward the radial direction, and the vibration damping member fixing hole in the horizontal portion of the end thereof. 866 is formed, and thus the supporter 80 is installed such that the supporter fixing part 86 is fastened around the upper air inlet 410b of the fan housing 40.

Looking at the assembly process of the blower which is the main part of the present invention configured as described above and the operation of the outdoor unit are as follows.

First, the BLDC motor 6 has the shaft 68 rotatably installed in the bearing housing 82 of the supporter 80 by the bearings 69a and 69b, and the stator 65 is rotatable. The shaft assembly is screwed on the upper surface of the stator fixing portion 84 of the supporter to form a motor assembly. The motor assembly has the shaft 68 in the state where the sirocco fan 50 is positioned inside the fan housing 40. It is installed to be connected to the center of the shaft of the sirocco fan 50, the supporter fixing portion 86 of the supporter 80 is assembled and fixed with a bolt or the like in a state raised around the air inlet 410b of the upper surface of the fan housing. .

Therefore, the blower 1 in which the BLDC motor 6 is assembled is fixedly installed by a separate bracket in a state of being mounted on the outdoor unit side heat exchanger 20, and the BLDC motor 6 is operated. It is installed to be connected by the control box 30 and the wire to control the.

Looking at the operation of the outdoor unit assembled as described above, the compressor is operated according to the signal of the control box 30, and the refrigerant flows into the indoor unit through the compressor, the outdoor unit side heat exchanger 20, expansion means And circulates along the indoor unit side heat exchanger.

At this time, since the refrigerant is circulated to the outdoor unit side heat exchanger 20 and the sirocco fan 50 is driven by the BLDC motor 6, the air sucked through the inlet I of the case 10a is After passing through the outdoor unit side heat exchanger 20, the refrigerant is heat-exchanged to condense the refrigerant, and then the heat-exchanged air is discharged through the discharge port O of the case 10a through the sirocco fan 50.

Of course, the BLDC motor 6 may be operated at various rotational speeds because the torque characteristic is wide, and thus, the noise may be reduced as it is stably operated, and further, power consumption may be reduced.

Accordingly, the BLDC motor 6 sucks air in the axial direction as the sirocco fan 50, which is a kind of centrifugal fan, rotates, so that most of the air passing through the outdoor unit side heat exchanger 20 is the fan. While being sucked into the lower air inlet 410a of the housing 40, a portion thereof is sucked into the upper air inlet 410b of the fan housing, and is connected to the shroud 44 formed at the respective air inlets 410a and 410b. Guided by the fan housing 40 and discharged in the circumferential direction and guided by the fan housing 40 to communicate with the air outlet of the fan housing. Passed through.

At this time, since the BLDC motor 6 is installed at the air inlet 410b of the air inlet 410a and 410b of the fan housing 40, the suction flow resistance can be reduced. In addition, the high efficiency and stable driving can increase the blowing efficiency and heat exchange efficiency.

On the other hand, Figure 21 is a cross-sectional view of the blower according to another embodiment of the present invention, the blower according to the present embodiment is the same as the configuration of the blower of the above-described embodiment, the supporter 80 "is the fan housing 40 It is characterized in that it is directly coupled to and supported by the outer case 10 ".

That is, the shape of the supporter fixing part of the shape of the supporter of the above-described embodiment is changed to a shape that can be directly coupled to the outer case 10 ″, and thus the support bracket for supporting the shape of the outer case and the fan housing 40. The installation form of (11) is only slightly modified, and the remaining part is the same as the configuration of the above-described embodiment.

Therefore, detailed description of the structure of the remaining individual parts will be omitted to avoid duplication.

On the other hand, although some embodiments have been described above, it will be apparent to those skilled in the art that the present invention may be embodied in many other forms without departing from the spirit and scope thereof.

Accordingly, the above-described embodiments should be considered illustrative rather than restrictive.

The air conditioner of the present invention configured as described above can vary the rotation speed of the blowing fan because the BLDC motor is applied to maintain a high efficiency and stable at the most rotational speed to drive the blowing fan.

In addition, the air conditioner of the present invention has a number of advantages in that the blower is stable in all rotational speeds and at the same time high efficiency operation can reduce noise and power consumption.

In particular, the blower of the present invention is more advantageous when applied to the outdoor unit for the air conditioner of the front suction method.

Claims (29)

A compressor for compressing the refrigerant passing through the indoor unit, A condenser that condenses the refrigerant passing through the compressor by heat exchange with surrounding air; A blowing fan installed inside the fan housing for blowing air heat exchanged by the condenser; A shaft axially connected to the blowing fan; A supporter fixed to the fan housing; A stator having a core and a coil and constituting the BLDC motor together with the rotor, A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; Is interposed between the rotor and the shaft to transfer the rotational force of the rotor to the shaft, including a rotor bushing installed into the rotor frame, And the rotor frame, the rotor bushing, and the shaft are integrally formed. The method of claim 1, The rotor bushing is an insulating resin material, the air conditioner characterized in that it is integral with the rotor frame by insert injection. The method of claim 1, The rotor frame is made of a resin or iron material, the bushing is made of a resin material, the shaft is an air conditioner, characterized in that made of iron material. A compressor for compressing the refrigerant passing through the indoor unit, A condenser that condenses the refrigerant passing through the compressor by heat exchange with surrounding air; A blowing fan installed inside the fan housing, A shaft axially connected to the blowing fan; Bearings supporting both sides of the shaft, A stator having a core and a coil and constituting the BLDC motor together with the rotor, A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; Including a supporter for supporting the stator and bearing, Air conditioner, characterized in that one of the bearing is located inside the blowing fan. The method of claim 4, wherein The supporter is provided with a cylindrical bearing housing which is formed in the axial direction so that the shaft support bearing is installed therein and the distance between the two bearings can be installed far apart. The method of claim 4, wherein Among the bearings on both sides, the bearing located close to the rotor side is a larger air conditioner than the bearing located close to the blowing fan side. A compressor for compressing the refrigerant passing through the indoor unit, A condenser that condenses the refrigerant passing through the compressor by heat exchange with surrounding air; A blowing fan installed inside the fan housing for blowing air heat exchanged by the condenser; A shaft axially connected to the blowing fan; A supporter fixed to the fan housing; A stator having a core and a coil and constituting the BLDC motor together with the rotor, It is configured to include a rotor having a rotor frame installed on the inner side and a rotor frame rotatably installed outside the stator, The rotor frame is an air conditioner, characterized in that formed in the thickness range 1.2 ~ 2.5mm. The method of claim 7, wherein An air conditioner, characterized in that the ring-shaped back yoke is installed inside or outside the rotor frame. The method of claim 7, wherein Air conditioner, characterized in that the laminated back yoke is installed inside the rotor frame. The method of claim 7, wherein The rotor frame is an air conditioner, characterized in that also serves as a back yoke as the iron plate material. The method of claim 7, wherein An air conditioner, characterized in that the Hall sensor is provided between the magnet and the stator. The method of claim 7, wherein An air conditioner, characterized in that the hall sensor is provided on the outside of the magnet. The method of claim 7, wherein The rotor frame is an air conditioner comprising a steel plate frame forming a rotor frame shape and a ring-shaped iron plate wound around the steel plate frame to reinforce the strength of the steel plate frame. The method according to claim 10 or 13, The rotor frame surface is characterized in that the zinc is coated for rust prevention air conditioner. The method of claim 7, wherein An air conditioner, characterized in that the bottom surface of the rotor frame is provided with a cooling fin protruding toward the blowing fan. The method of claim 7, wherein An air conditioner, characterized in that the bottom surface of the rotor frame is provided with a cooling fin protruding toward the opposite side of the blowing fan. The method of claim 7, wherein And an air gap between the stator and the rotor is maintained at 1 mm. A compressor for compressing the refrigerant passing through the indoor unit, A condenser that condenses the refrigerant passing through the compressor by heat exchange with surrounding air; A blowing fan installed inside the fan housing for blowing air heat exchanged by the condenser; A shaft axially connected to the blowing fan; A supporter fixed to the fan housing; A stator having a core, a coil wound on a tooth of the core, and a coil, and an insulator surrounding the core and constituting a BLDC motor together with a rotor; It includes a rotor having a rotor frame installed on the inner side and a rotor frame rotatably installed outside the stator, The insulator of the stator has a surface protruding further up and down than the wound coil surface, And a plug member inserted into a gap between the teeth formed on the outer circumferential surface of the stator to fill a gap between the teeth and block noise generation due to the gap. The method of claim 18, And a surface protruding further from the wound coil surface is a rib provided in the tooth portion of the insulator. The method of claim 19, And the coil winding part of the stator is positioned so that its vertical length does not deviate between the end of the shaft and the bearing installed on the side opposite to the shaft support bearing provided on the blower fan side. The method of claim 18, An air conditioner, characterized in that the volume of the coil winding, which is a portion of the coil winding in the stator, is larger than the volume of the space between the coil windings. The method of claim 18, Air winding of the coil wound on the stator is characterized in that the concentrated zone. The method of claim 18, The winding method of the coil wound on the stator is air conditioner, characterized in that the distribution range. The method of claim 18, And the rotor and the stator are inserted into and fixed from the top of the shaft downward. delete The method of claim 18, In the tooth of the stator, Air conditioning, characterized in that the lacing treatment (lacing) so that the core teeth (core teeth) of the stator are tied to each other. delete delete delete

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