KR100932488B1 - Air conditioner - Google Patents

Abstract

The present invention relates to an air conditioner, to stably drive a blower fan, to increase the airflow amount, to reduce noise, and to provide an air conditioner that can increase the blowing efficiency and heat exchange efficiency.

The present invention for this purpose, and the case is formed with a discharge port for discharging the heat exchanged air and the inlet port for entering the outside air; A duct connected to the discharge port of the case to guide the air discharged through the discharge port to the room; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a BLDC motor together with a rotor; A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft; It provides an air conditioner characterized in that it comprises a supporter for holding the stator fixed to the outside of the blowing fan.

Duct, Duct Connection, Air Conditioner, BLDC Motor

Description

Air Conditioner {AIR CONDITIONER}

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

2A is a cross-sectional view illustrating main parts of the air conditioner of FIG.

Figure 2b is an exploded perspective view of the air conditioner of Figure 1

Figure 3a is a cross-sectional view showing the structure of the blower of the air conditioner of Figure 1

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 to 21 show each embodiment for reducing the noise of the motor according to the present invention,

17 to 19 are a perspective view and a plan view showing the plug member and its installation state;

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

Fig. 21 is a perspective view showing a raced state

22 and 23 are an exploded perspective view and a perspective view showing a discharge direction switching structure of the air conditioner of FIG.

24 is an exploded perspective view showing another embodiment of the air conditioner according to the present invention.

25 is a perspective view showing another embodiment of the air conditioner according to the present invention;

26 is a sectional view showing the main parts of the blowers of the air conditioner of FIG.

<Explanation of symbols on main parts of the drawings>

1: Case 2: Blower

3: heat exchanger 4: control unit

41: housing 42: opening and closing door

11: Intake 12: Front discharge outlet

14: Top cover 15: Cover panel

17: base bar 18: duct

19: filter assembly 21: fan housing

211,212: suction port 213: discharge outlet

25: shroud 26: vibration damping pad

50: blower fan 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

The present invention relates to an air conditioner, and more particularly, to an air conditioner, which is embedded in a ceiling of a building and blows air heat-exchanged in the room through a duct.

In general, an air conditioner is a type of air conditioner that cools or purifies indoor air to circulate it in order to create a comfortable environment in the room. Such an air conditioner may be divided into an integral type in which a part constituting a cooling cycle is provided in one unit and a separate type in which two units are separately provided. On the other hand, the air conditioner may be classified into a wall-hung type that hangs the indoor unit on the wall, and an upper type that installs the indoor unit on the floor, and a ceiling type that hangs the indoor unit on the ceiling or installs the inside of the ceiling according to the product type.

An air conditioner is a type of a ceiling type air conditioner that supplies cooling air to various indoor spaces simultaneously through a plurality of ducts branched from one indoor unit installed inside the ceiling. Such an air conditioner is a separate type, that is, an outdoor unit for compressing and liquefying a refrigerant by incorporating a compressor and a condenser, and an indoor unit for cooling indoor air by evaporating the refrigerant by incorporating an evaporator. It is common to get there.

However, such general air conditioners have a problem of low efficiency because a general single-phase or three-phase induction motor is applied to drive a blower fan. That is, the induction motor used to drive the conventional fan motor has a low efficiency of 40 to 50% or less in general, and in particular, a narrow range of stable torque characteristics, which is a rotational force, is limited in the range of the variable speed range, and rotation If the number is out of the stable torque characteristics there is a problem that causes abnormal noise and efficiency degradation.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an air conditioner that can stably drive a blower fan, increase the airflow amount, reduce noise, and increase blower efficiency and heat exchange efficiency. .

In order to achieve the above object, the present invention, the inlet and the air inlet and the air outlet heat exchanged air outlet is formed; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a motor together with a rotor; A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft; It provides an air conditioner characterized in that it comprises a supporter for holding the stator fixedly.

According to an aspect of the present invention, there is provided a gas inlet, including: a case having a suction port through which external air is introduced and a discharge port through which heat exchanged air is discharged; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a motor together with a rotor; A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft and installed inside the rotor frame; An air conditioner is provided, characterized in that it comprises a supporter for holding the stator fixedly.

According to another aspect of the present invention, there is provided a gas inlet comprising: a case having a suction port through which external air is introduced and a discharge port through which heat exchanged air is discharged; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a motor together with a rotor; A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft; And a stator fixing part for supporting the stator and a bearing housing part having a bearing rotatably supporting the shaft, wherein at least one of the bearings includes a supporter disposed to be located inside the blower fan. An air conditioner is provided, characterized in that it is configured.

According to still another aspect of the present invention, there is provided a gas inlet comprising: a case having a suction port through which external air is introduced and a discharge port through which heat exchanged air is discharged; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a motor together with a rotor; A rotor installed rotatably on the outside of the stator, the rotor frame having a thickness of 1.2 to 2.5 mm, and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft; An air conditioner is provided, characterized in that it comprises a supporter for holding the stator fixedly.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the air conditioner according to the present invention.

As shown in FIGS. 1 and 2A and 2B, the indoor unit of the air conditioner is a box-shaped case 1 which is installed inside the ceiling as a whole, and is installed on one side of the case 1 to force indoor air. And a heat exchanger (3) for suctioning and discharging, and a heat exchanger (3) installed at the other side of the case (1) and cooling the indoor air sucked by the blower (2).

The case 1 includes an inlet port 11 and an outlet port 12 that protect components such as an air blower 2 or a heat exchanger 3 therein, and are respectively connected to a duct 18 communicating with a room. do. In addition, a control unit 13 is attached to one side of the case 1, and a controller and related parts for controlling the operation of the blower 2 and the heat exchanger 3 according to an external input therein. Are located.

The upper part of the case 1 is formed to be open, and the top cover 14 is detachably installed at the open part. The top cover 14 has an upper discharge port 141 is formed to replace the front discharge port 12 of the case 1, if necessary, the cover panel 15 for closing and opening the upper discharge port 141. This is detachably combined. The upper discharge port 141 and the cover panel 15 preferably have a size and shape corresponding to the size and shape of the front discharge port 12 of the case (1).

The lower part of the case 1 is attached to the base bar 17 of the U-shape which is spaced apart from the bottom by a distance from the bottom of the case 1 so as to easily transport the air conditioner by a forklift. The lower surface of the base bar 17 is preferably formed with a fastening hole 172 to fasten bolts and the like for coupling with the pallet (pallet).

The heat exchanger (3) is an evaporator which is connected to a compressor and a condenser and a refrigerant pipe provided in an outdoor unit and constitutes a refrigeration cycle. The low temperature and low pressure liquid refrigerant passing through the refrigerant pipe takes heat from indoor air passing between heat exchange fins and vaporizes it. It cools the indoor air.

On the other hand, the control unit 4 is inserted into one side of the case 1, the housing 41 is installed with various electrical components and PCB for control, and the sliding movement up and down the side portion of the case (1) It is composed of an opening and closing door 42 that opens and closes the housing 41.

The housing 41 may be coupled in such a manner that both side portions are screwed to the case 1, but alternatively, as shown in FIG. 2, the engaging pieces 412 are formed at both sides of the housing 41. The bending groove 111 is formed to be bent, and the locking piece 412 is fixed to the case 1 by the locking piece 412. The locking piece 412 is inserted into the locking groove 111, so that the housing 41 has its own weight. It may be coupled to the case (1).

The opening and closing door 42 is preferably provided with a handle 43 so that the operator can easily operate the opening and closing door 42 when performing the A / S.

In addition, a filter assembly 19 is installed at the connection portion between the duct 18 and the front discharge port 12 to remove fine dust and bacteria from the discharged air. The filter assembly 19 may include an antibacterial filter 191 for filtering bacteria and suppressing the growth of bacteria, and a dust collecting filter 192 for collecting fine dust and the like. The dust collecting filter 192 may be configured using a paper filter.

Since the antimicrobial filter 191 and the dust collecting filter 192 are preferably replaced periodically, it is preferable to install a door (not shown) for opening and closing the filter mounting part on one side of the filter assembly 19. The door may be configured to operate in a rotatable or sliding manner.

The blower 2 includes a blower fan 50, a BLDC motor 6 driving the blower fan 50, and a fan housing 21 installed to guide the flow of air to the outside of the blower fan 50. And a supporter 80 installed at one side suction port 212 of the fan housing 21 to support the BLDC motor 6.

The blowing fan 50 is preferably a sirocco fan (sirocco fan) is a kind of centrifugal fan.

Inlet fan 211 and 212 and discharge port 213 are formed in the fan housing 21. The discharge port 213 of the fan housing 21 allows the cooled air to be discharged directly into the duct. It is connected to the duct 18 through the front discharge port 12 of. The fan housing 21 is preferably made of a metal plate, but is not limited to the material.

The fan housing 21 is fixed to the inside of the case 1 while being supported by the fan frame 27 connected in the form of a cuboid frame.

Referring to Figures 3a to 21 will be described in more detail with respect to the blower as follows.

First, as shown in FIGS. 3A and 3B, a shaft 68 transmitting a driving force of a motor of the BLDC motor 6 to the blowing fan 50 of the blowing device 2 is provided to the blowing fan 50. Is installed. In addition, the shaft 68 is rotatably supported by two bearings 69a and 69b which are installed at a side close to the BLDC motor 6 at a predetermined distance from the inside of the supporter 80. The end portion of the shaft 68 is rotatably supported by a bearing 284 provided on the inlet 211 side of the fan housing 21. The bearing 284 is installed by the outer bearing housing 282, and the outer bearing housing 41 is formed by a plurality of support brackets 28 extending radially toward the inlet 211 of the fan housing 21. Supported.

The BLDC motor 6 is coupled to one end of the shaft 68, the rotor bushing 70, the rotor bushing 70 is coupled to the driving force through the rotor bushing 70 to the shaft 68 The stator 65 is installed to be located inside the rotor 60 to form a rotor 60, the BLDC motor 6 together with the rotor 60 and fixed to maintain the concentricity on the supporter 80. It is configured to include. The rotor bushing 70 is preferably made of an insulating material.

The blowing fan 50 installed inside the fan housing 21 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 21. That is, the center line of the upper and lower surfaces of the fan housing 21 and the center axis of the blower fan 50 installed therein do not coincide with each other and are spaced apart from each other. Thus, as can be seen through Figure 3a, the space between the fan housing 21 and the blowing fan 50 is different from each other.

In addition, a forming unit 215 is formed on the upper surface of the fan housing 21 for strength reinforcement, and the forming unit 214 formed on the upper surface of the fan housing 21 is formed in a substantially circumferential direction.

Both sides of the fan housing 21 are provided with a shroud 25 for guiding a flow of air introduced from the outside. The shroud 25 includes a fastening surface 25a fastened to both sides of the suction ports 211 and 212 of the fan housing 21 and a guide surface 25b having a predetermined curvature for guiding air flow.

In this embodiment, the shroud 25 is formed separately from the fan housing 21, but may be formed integrally with the fan housing 21. In this case, the thickness of the shroud 25 is preferably thinner than the other portion toward the end.

Meanwhile, referring to FIGS. 3A, 3B, 4A, and 4B, the supporter 80 includes bearing housings in which bearings 69a and 69b for supporting the shaft 68, such as ball bearings, are installed therein. And a supporter fixing portion 86 extending radially outward of the bearing housing portion 82 so as to fix the supporter 80 to the upper surface of the fan housing 21. It is configured to include a stator (65) fixing portion formed to connect between the chief 86 and provide a surface for fixing the stator (65). That is, the supporter fixing portion 86 of the supporter 80 is triangulated. The supporter 80 is made of metal such as aluminum, and is preferably cast.

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 positioned inside the fan housing 21 when the supporter is assembled to the fan housing 21. The fan housing 21 is bent upwardly so as 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.

The upper bearing 69a (see FIG. 3A) of the shaft support bearing is positioned inside the blower fan.

3A, 3B, and 5, a vibration damping pad 26 may be provided on the contact surface between the fan housing 21 and the shroud 25.

More specifically, the vibration damping pad 26 is interposed between the fastening surface 25a of the shroud 25 and the peripheral surface of the air inlets 211 and 212 of the fan housing 21 in contact with it. Blocking the transmission to the fan housing (21).

In addition, a damping member 90 is provided between the supporter fixing part 86 and the fan housing 21 of the supporter 80.

As illustrated in FIG. 5, the vibration damping member 90 is forced through a main body portion 901 abutting on the fan housing 21 and a vibration damping member fixing hole 866 formed in the supporter fixing portion 86. It is made of a head portion 902 is inserted into the fixed to the supporter fixing portion 86, the through hole 903 through the body portion 901 and the head portion 902 is provided.

Then, when the supporter 80 is fixed to the fan housing 21 side, the head portion 902 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 metal material such as an iron plate to prevent the damage of the vibration damping member 90 generated by the acting fastening force is overlaid.

The cover bracket 95 refers to an iron piece having a substantially U shape to surround the head portion 902.

That is, the vibration damping member 90 pushes the head portion 902 through the vibration damping member fixing hole 866 formed in the supporter fixing portion 86 to force the body portion 901 and the head portion 902. The neck portion to be connected is fixed by being caught around the damping member fixing hole 866. After covering the cover bracket 95 to the head portion 902 in such a state, the fan housing 21 passes through the bolt 15d through the through hole 930 of the cover bracket 95 and the damping member 90. When it is fastened to the supporter 80 is fixed to the fan housing 21.

3A, 3B, 6A, and 6B, the blower 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 and the blowing 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.

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 penetrates the bolt fastening hole 560c during assembly on the outer circumferential surface of the middle portion of the shaft 68. And a flat section 685 to which the pressing force of the bolt 15f to be fastened is applied.

During assembly, as the pressing force of the bolt is applied to the plane section 685, the blowing 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.

Meanwhile, the rotor bushing 70 is preferably made of an insulating resin material having a vibration mode different from that of the steel plate rotor frame 60a, but the material is not limited thereto.

The rotor bushing 70 may be integrally formed 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 is in a substantially bowl shape. Frame 60a is preferably made of an iron plate in consideration of productivity and formability.

However, the present invention is not limited thereto, and the rotor frame 60a may be formed of an injection molding, or may be made of an injection molding material made of a metal sheet and a resin covering the outside thereof.

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 is formed 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.

Meanwhile, the rotor frame according to the present embodiment is characterized in that the rotor frame itself serves as a back-yoke as a steel plate material, but a ring-shaped back yoke is installed inside or outside the rotor frame, or laminated inside the rotor frame. A back yoke may be installed. In particular, when the rotor frame is made of an insulating synthetic resin material, it is preferable that a separate back yoke is attached to 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 gap formed between the rotor and the stator to be described later, that is, the air gap (air-gap) is preferably maintained to 1mm.

Referring to FIGS. 3B and 10 to 12, 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) and the fastening hole is formed to surround the core to be insulated and protrudes into the core to fasten the stator (65) to the fan housing 21 by a fastening member such as a bolt (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, so that vibration generated when driving the motor is sufficient. Because it can endure.

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.

In addition, as shown in FIG. 12, the spiral core 65a is wound in a spiral form from the bottom layer to the top layer to form a multilayer structure, and radially from the base portion 652a of the spiral core 65a. A plurality of teeth 654a protrude outwardly in a radial direction, and the base portion 652a of the spiral core 65a is provided with a rectangular or trapezoid recessed groove 656a to reduce stress when the core is wound. do.

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 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 supporting 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.

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 the teeth 654a and the base 652a in a divided form along the circumferential direction on the base material, and then welding the divided core pieces to connect 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 another example of a 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. 15, the spiral core 65a is a core. Or instead of the split core, it is shown that an iron plate composed of the teeth 654a and the base portion 652a may be applied with a tubular core 65a ″ that is connected in a circumferential direction without breaking. As shown at 16.

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.

Meanwhile, referring to FIGS. 17 to 19, 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 ( 67 may be further provided.

At this time, the plug member 67 is integrally formed inside the hub portion so as to correspond to the hub portion 911 seated on the upper surface of the stator and the fastening rib portion of the stator for fixing the stator to the rear wall portion of the tub. It includes a fastening rib portion 912 is formed, and a plug tip 913 is formed integrally to be spaced apart by a predetermined interval along the circumferential direction on the outer surface of the hub portion and plug the gap between the teeth of the stator do.

If the plug member 67 is not installed in the stator and there is a gap between the teeth of the stator 7, the air of each tooth gap comes out 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, which may amplify the noise.

However, in the present invention, since the plug member 67, which is a non-magnetic structure that can fill the gap between the teeth of the stator, is provided, there is no stagnant air in the space between the teeth formed in the stator 7. By doing so, it is possible to suppress the generation of noise.

In addition, the plug tip may be in the form of completely filling the gap between the teeth, but if the form of sealing the entrance of the teeth may not be filled in the internal space, such a structure will be more advantageous for heat dissipation of the stator .

Meanwhile, as shown in FIG. 20, a blocking film 920 is provided on the outside of the stator 65 ′ to shield the gap between the teeth, and 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 920 is a nonmagnetic material, and preferably has a ring-shaped structure surrounding the entire outer surface of the stator. This blocking film also has the same effect as the plug member 910.

In addition, the blocking layer 920 may have a structure separated into unit pieces to individually block each tooth gap.

On the other hand, as shown in Figure 21, 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 may also reduce the vibration noise of the coretis .

At this time, the lacing treatment is performed by a non-magnetic lacing thread 930, for example, a polyester thread (Polyester thread).

In this case, the coreis constituting the stator of the BLDC motor is race-processed, and the racing seal 930 serves to hold the coreis to prevent the vibration of the coreis due to the polarity change when the motor is driven. In addition to preventing the occurrence of peak noise, the level of overall noise can be reduced.

Operation of the air conditioner of the present invention configured as described above is made as follows.

Through the tap housing assembly 300 for power connection, current flows sequentially through the coil 65c of the stator constituting the BLDC motor 6 so that the rotor 60 rotates.

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 to which the magnet 60b is fixed is to rotate.

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.

As described above, when the rotation of the rotor 60 occurs, the rotor bushing 70 coupled to the rotor 60 and the shaft 68 coupled to the serration rotate, thereby blowing air through the shaft 68. Power is transmitted to the fan 50 so that the blowing fan rotates.

When a blowing force is generated by the rotation of the blower fan 50, air is forcedly sucked through the inlet 11 of the case 1. The air forced into the case 1 is heat-exchanged and cooled while passing through the heat exchanger 3, and then sucked through the inlet 211 and 212 of the fan housing 10, and then the air in the fan housing 21. It is discharged to the duct 18 through the discharge port 213 and the front discharge port 12 of the case (1).

The air discharged to the duct 18 is discharged into the room under the guidance of the duct to perform cooling.

On the other hand, when the power is applied to the BLDC motor (6) as described above when the blower (2) acts, as a sensor for controlling the operation of the BLDC motor (6) is applied a Hall sensor 200, the hall The sensor may be installed between the magnet and the stator, or may be installed outside the magnet.

On the other hand, the effect of the air conditioner 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 air conditioner according to the present invention can effectively install and install the BLDC motor 6 on the side where the suction air volume of the fan housing is small by using a separate supporter 80, and a part of the BLDC motor is the fan housing 21. By installing to be inserted inside) it is possible to reduce the size of the blower (2), thereby reducing the overall size of the air conditioner.

In addition, since the air conditioner according to the present invention is a motor direct 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 (2) of the air conditioner according to the present invention, since the rotor 60 is a steel plate structure can be manufactured by press molding, the moldability is excellent, and the time required for manufacturing is very short, thereby improving productivity.

On the other hand, the blower 2 of the air conditioner according to the present invention is bent having a magnet 60b seating surface on the side wall surface 604 formed perpendicularly extending from the edge of the bottom surface 602 of the rotor frame 60a. Since the part 604a is formed along the circumferential direction, when the magnet 60b is attached to the inner surface of the rotor, the support surface of the magnet 60b is made stable by the seating surface, so that the manufacturing of the rotor 60 can be easily performed. do.

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 is the first end of the opening end of the side wall surface 604 of the rotor frame (60a) radially outward, the end of the rotor is second bent in the direction of the bottom surface 602 again, 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 can be 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 and transmitted to the shaft 68. Will work.

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.

In addition, the height of the fastening part 655b may be equal to or greater than the total height of the stacked cores. However, if 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 air conditioner of the present invention, because the fan housing 21 of the blower 2 is made of a heat-resistant metal and a light plate, it becomes low cost and good manufacturability.

In addition, the supporter 80 may be made of a metal material such as an aluminum alloy, in which case there is little thermal deformation with respect to temperature, and there is almost no corrosion by moisture.

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.

On the other hand, the duct type air conditioner of the present invention is very easy to change the position of the blower (2) because the structure of the drive unit for driving the blower fan (50), that is, BLDC motor (6) is very easy, There is an advantage that the change in the discharge direction of the air is free.

That is, as shown in FIGS. 22 and 23, the top cover 14 is separated from the upper part of the case 1, and then the cover panel 15 of the top cover 14 is removed to remove the top cover 14. The front discharge port 12 is closed. Then, the blower 2 is turned to allow the discharge port 213 of the fan housing 21 to coincide with the upper discharge port 141 of the top cover 14.

Subsequently, when the top cover 14 is recombined with the upper surface of the case 1, the discharge passage is formed upward while the top cover 14 and the discharge port 213 of the fan housing 21 communicate with each other.

In addition, unlike this embodiment, as shown in FIG. 24, the fan of the blower 2 is not mounted on the upper discharge port 141 of the top cover 14 without the cover panel 15 (see FIG. 22). The discharge direction is further changed by coupling the upper discharge port 141 of the top cover 14 and the closing panel 29 for selectively opening and closing the front discharge port 12 of the case 1 to the upper surface of the frame 27. It may be easy.

In this case, when the operator removes the top cover 14 and rotates the blower 2 to change the direction of the discharge port 213 of the fan housing 21, the closing panel 29 is upper part of the top cover 14. The discharge port 141 or the front discharge port 12 of the case 1 is automatically closed. Subsequently, when the operator couples the top cover 14 to the upper surface of the case 1, the switching of the discharge direction is completed.

Meanwhile, although the air conditioner of the above-described embodiments is configured with one blower in one case, as shown in FIGS. 25 and 26, a plurality of blowers are configured in one case 1 to increase the blowing capacity. You can double it.

In the air conditioner of this embodiment, two front discharge holes 12 are formed in the case 1, and two blowers 2 are installed inside the case 1, and each blower 2 is one. It is configured to be driven by the BLDC motor (6).

That is, the BLDC motor 6 is mounted to the first blower 2a of the blower 2, and the blower fan 50 of the second blower 2b is axially connected to the BLDC motor 6. It is powered by the power (68).

Since the configuration of the first blower 2a is substantially similar to that of the first blower 2a shown in FIG. 3A, a detailed description thereof will be omitted.

The second blower 2b includes a fan housing 21 and a blower fan 50 in the same manner as the first blower 2a. The supporter 80 is fixed to the suction port 212 adjacent to the first blower 2a of the suction port 211 of the fan housing 21. A bearing housing 82 in which bearings 69a and 69b rotatably support the shaft 68 is integrally formed at the central portion of the supporter 80.

The bearing housing 82 may be equipped with two bearings 69a and 69b similarly to the supporter 80 of the first blower 2a, but one or three or more bearings may be used, and the shaft ( 68 may extend to the inlet 211 on the opposite side of the fan housing 21 and constitute a separate supporter in which a bearing for rotatably supporting the end of the shaft 68 is inserted in the inlet 211. will be.

Of course, unlike this embodiment, it is also possible to configure and drive the BLDC motor independently in each blower.

In addition, one blower fan may be used for two blowers, but two blower fans may be simultaneously rotated with one driving device by forming two shaft BLDC motors by extending two shafts in opposite directions to the rotor of the blower motor. There will be.

As described above, according to the present invention, since the air conditioner of the present invention is applied to the BLDC motor that is stable at the most rotational speed and maintains high efficiency in order to drive the blower fan, the rotational speed of the blower fan can be variously changed. have.

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 addition, since the structure of the driving unit for driving the blower fan is simplified, the position of the blower can be easily changed. Therefore, the discharge direction can be easily switched, so that the upper discharge type air conditioner and the front discharge type air conditioner are provided by one air conditioner. There is also the advantage to implement groups simultaneously.

In addition, there is an advantage that can be driven by configuring a plurality of blowers in one case with a simple structure and compact size.

Claims (57)

A case having a suction port through which external air is introduced and a discharge port through which heat exchanged air is discharged; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a motor together with a rotor; A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft; A fan housing installed to surround the blower fan at an outside of the blower fan, the inlet and outlet of which air is introduced therein; At least one bearing rotatably supporting the shaft is provided, and a bearing housing part installed inside the fan housing and a supporter fixing part which is formed to extend radially outwardly to the bearing housing part and is fixed to the fan housing. And a supporter including a stator fixing part which is formed to connect between the supporter fixing parts and provides a surface on which the stator is fixed, and a surface on which the stator is fixed is provided to be located inside the fan housing. Air conditioner characterized in that configured by. The air conditioner of claim 1, wherein the rotor bushing is formed of an insulating resin material and installed inside the rotor frame. The rotor bushing according to claim 1 or 2, wherein the rotor bushing includes a fitting portion in which the shaft is fitted into and engaged with the center, and a coupling portion extending radially around the fitting portion for fastening with the rotor frame. Air conditioner characterized in that configured. 4. The air conditioner of claim 3, wherein the rotor bushing is integral with the rotor frame by insert injection. According to claim 1, wherein the rotor frame is made of a resin or iron material, the rotor bushing is made of a resin material, the shaft is made of iron material, the rotor frame and the rotor bushing and the shaft is characterized in that the integral Air conditioning. The air conditioner according to claim 1, wherein the blowing fan is a sirocco fan. delete The air conditioner according to claim 1, wherein the supporter is fixed to the inlet side of the fan housing. The air conditioner according to claim 8, further comprising a shroud between the fan housing and the supporter for guiding air flow into the fan housing. The air conditioner according to claim 8, wherein the fan housing and the supporter coupled thereto are provided with a positioning protrusion or a positioning groove corresponding to each other. The air conditioner of claim 9, wherein a vibration damping pad is provided between the fan housing and the shroud to absorb vibrations. delete The air conditioner of claim 1, wherein an end of the supporter fixing part is bent to be exposed to the outside of the fan housing. The method of claim 1, wherein the end of the supporter fixing portion is bent to the outside of the fan housing compared to the stator engaging surface, when the supporter is assembled to the fan housing, at least the stator engaging surface of the supporter is located inside the fan housing Air conditioner. The air conditioner according to claim 1, wherein the supporter fixing part is provided with a reinforcing rib along the longitudinal direction. The air conditioner of claim 1, wherein a vibration damping member is provided between the fixing part of the supporter and the fan housing to absorb vibration. The air conditioner according to claim 1, wherein the stator fixing part of the supporter is provided with a positioning protrusion or a positioning groove for determining an assembly position with the stator. The method of claim 1, wherein the upper surface of the case is formed to be open, the top cover is detachably coupled to the open upper surface; And the upper cover has an upper discharge port of a shape and size corresponding to the shape and size of the discharge port of the case so that the air discharged by the blower fan is discharged. 19. The air conditioner of claim 18, wherein a cover panel for selectively opening and closing the upper discharge port and the discharge port of the case is detachably mounted to the top cover. The air conditioner of claim 1, further comprising a fan frame which supports the fan housing to be fixed. 21. The method of claim 20, wherein the upper surface of the case is formed to be open, the top cover is detachably coupled to the open upper surface; The top cover is formed to open the upper discharge port of the shape and size corresponding to the shape and size of the discharge port of the case so that the air discharged by the blowing fan is discharged; The air conditioner, characterized in that the closing panel for selectively opening and closing the upper discharge port of the top cover and the discharge port of the case in accordance with the installation direction of the fan frame on one surface of the fan frame. The control apparatus of claim 1, further comprising: a housing mounted on one side of the case and mounted with various electrical parts for controlling the operation of an air conditioner, and an opening / closing door movably installed on one side of the case to open and close the housing. An air conditioner, characterized in that further comprises a device unit. 23. The air conditioner of claim 22, wherein a handle is provided in the opening / closing door. 23. The air conditioner of claim 22, wherein the housing is screwed to the case. 23. The air conditioner according to claim 22, wherein 'a' shaped locking pieces are formed at both sides of the housing, and a locking groove is formed in the case to engage the locking pieces. The air conditioner according to claim 1, wherein a filter assembly for filtering fine dust or the like from the discharged air is detachably installed at the discharge port of the case. The air conditioner according to claim 26, wherein the filter assembly comprises an antibacterial filter for filtering bacteria and a dust filter for filtering fine dust. The air conditioner according to claim 1, further comprising a plurality of U-shaped base bars which are coupled to the lower part of the case so that the lower surface of the case is spaced apart from the floor by a predetermined distance. The air conditioner according to claim 1, wherein a plurality of blowing fans are installed in the case. 30. The air conditioner of claim 29, wherein each of the blower fans is axially coupled to the shaft connected to the rotor of one BLDC motor to rotate simultaneously. 30. The air conditioner according to claim 29, wherein BLDC motors are independently mounted to each of the blower fans so that the blower fans are individually driven. The method of claim 1, And two bearings are installed in the bearing housing so as to be spaced apart by a predetermined distance to support two parts of the shaft. 33. The air conditioner of claim 32, wherein one of the bearings farther from the rotor is located inside the blower fan. 33. The air conditioner of claim 32, wherein one of the bearings located closer to the rotor side is larger than the bearings located close to the blowing fan side. The air conditioner of claim 1, wherein the rotor frame has a thickness in a range of 1.2 to 2.5 mm. 36. The air conditioner of claim 35, wherein a ring back yoke is installed inside or outside the rotor frame. 36. The air conditioner of claim 35, wherein a laminated back yoke is installed inside the rotor frame. 36. The air conditioner of claim 35, wherein the rotor frame serves as a back yoke as a metallic material. The air conditioner of claim 1, wherein a hall sensor is provided between the magnet and the stator. The air conditioner according to claim 1, wherein a hall sensor is provided outside the magnet. The air conditioner according to claim 1, wherein the rotor frame comprises an iron plate frame forming a rotor frame shape and a ring-shaped iron plate wound around the iron plate frame to reinforce the strength of the iron plate frame. 42. The air conditioner of claim 41, wherein the rotor frame surface is coated with zinc for rust prevention. The method of claim 1, 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 1, 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 1, And an air gap between the stator and the rotor is maintained at 1 mm. The air conditioner of claim 1, wherein the stator includes an insulator surrounding the core, and the insulator has a surface protruding further up and down than a wound coil surface. 49. The air conditioner of claim 46, wherein a surface protruding further from the wound coil surface is a rib provided at an end of the tooth portion of the insulator. The method of claim 46, 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. 47. The air conditioner of claim 46, wherein a volume of the coil winding of the stator is larger than a volume of the space between the coil windings. 47. The air conditioner of claim 46, wherein a winding method of the coil wound around the stator is a concentrated zone. The air conditioner according to claim 46, wherein a winding method of the coil wound on the stator is a distribution range. The method of claim 46, 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. 47. The air conditioner of claim 46, wherein lacing is tied to the teeth of the stator so that core teeth of the stator are tied together. A case having a suction port through which external air is introduced and a discharge port through which heat exchanged air is discharged; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a motor together with a rotor; A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft and installed inside the rotor frame; A fan housing installed to surround the blower fan at an outside of the blower fan, the inlet and outlet of which air is introduced therein; It comprises a supporter for holding the stator fixedly, The supporter, A bearing housing part having at least one bearing rotatably supporting the shaft and installed in the fan housing; A supporter fixing part formed to extend radially outwardly of the bearing housing part and fixed to the fan housing; The air is characterized in that it is formed to connect between the supporter fixing portion and provides a surface for fixing the stator and the surface on which the stator is fixed comprises a stator fixing portion provided to be located inside the fan housing Harmonizer. A case having a suction port through which external air is introduced and a discharge port through which heat exchanged air is discharged; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a motor together with a rotor; A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft; And a stator fixing part for supporting the stator and a bearing housing part having a bearing rotatably supporting the shaft, wherein at least one of the bearings includes a supporter disposed to be located inside the blower fan. Air conditioner characterized in that configured. A case having a suction port through which external air is introduced and a discharge port through which heat exchanged air is discharged; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core and a coil and constituting a motor together with a rotor; A rotor installed rotatably on the outside of the stator, the rotor frame having a thickness of 1.2 to 2.5 mm, and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft; A fan housing installed to surround the blower fan at an outside of the blower fan, the inlet and outlet of which air is introduced therein; It comprises a supporter for holding the stator fixedly, The supporter, A bearing housing part having at least one bearing rotatably supporting the shaft and installed in the fan housing; A supporter fixing part formed to extend radially outwardly of the bearing housing part and fixed to the fan housing; The air is characterized in that it is formed to connect between the supporter fixing portion and provides a surface for fixing the stator and the surface on which the stator is fixed comprises a stator fixing portion provided to be located inside the fan housing Harmonizer. A case having a suction port through which external air is introduced and a discharge port through which heat exchanged air is discharged; A heat exchanger for heat-exchanging air introduced into the case; A blowing fan installed inside the case; A shaft axially connected to the blowing fan; A stator having a core, a coil, and an insulator surrounding the core and constituting a motor together with a rotor; A rotor rotatably installed outside the stator and including a rotor frame and a magnet installed on an inner side thereof; A rotor bushing interposed between the rotor and the shaft to transmit the rotational force of the rotor to the shaft; A fan housing installed to surround the blower fan at an outside of the blower fan, the inlet and outlet of which air is introduced therein; It comprises a supporter for holding the stator fixedly, The supporter, A bearing housing part having at least one bearing rotatably supporting the shaft and installed in the fan housing; A supporter fixing part formed to extend radially outwardly of the bearing housing part and fixed to the fan housing; It is formed to connect between the supporter fixing portion and provides a surface for fixing the stator and the surface on which the stator is fixed comprises a stator fixing portion provided to be located inside the fan housing, And the insulator of the stator has a surface protruding further up and down than a wound coil surface.

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