KR20090065937A - Motor - Google Patents

Abstract

A motor is provided to prevent troubles of components by discharging residual moisture from an inside of a case to the outside of the case though the moisture is permeated into the inside of the case thereof. A motor includes a stator, a rotor, a case(100), a moisture permeation prevention unit, and a moisture discharge unit. The rotor is rotatably installed at the stator. The case is formed with an upper case and a lower case in order to receive the stator and the rotor. The moisture permeation prevention unit prevents the permeation of the moisture into the inside of the case. The moisture discharge unit discharges the moisture from the inside of the case to the outside of the case. The moisture permeation prevention unit includes an extended rib extended from the upper case. The extended rib is used for covering an outer circumference of an upper surface of the lower case.

Description

Motor {MOTOR}

The present invention relates to a motor, and more particularly, to a motor used for an outdoor unit of an air conditioner.

In general, the motor transmits the rotational force of the rotor to the rotary shaft, the rotary shaft drives the load. For example, it may be connected to the pump of the dishwasher to drive the pump, and may be connected to the blower fan to supply air to the required space.

In these motors, the rotor is rotated by electromagnetic interaction with the stator. To this end, a coil is wound around the stator, and as the current is applied to the coil, the rotor rotates with respect to the stator.

1 shows an example in which a motor is used in an outdoor unit of a multi-type air conditioner.

In general, a multi-type air conditioner connects a plurality of indoor units to one outdoor unit, and each of the plurality of indoor units is used as a cooler or a heater while using the outdoor unit in common.

As shown in FIG. 1, the outdoor unit 10 of the multi-type air conditioner includes a compressor 11 for compressing a refrigerant and a liquid such that only a gaseous refrigerant may be introduced into the compressor 11 by being connected to the compressor 11. Accumulator (not shown) that accumulates refrigerant, an oil separator (not shown) connected to the compressor 11 to separate oil discharged together with the refrigerant from the compressor 11, and outdoor air 10) a blower fan 12 which sucks the inside and discharges it back to the outside, and a heat exchanger 13 which heats the air sucked by the blower fan 12 with the refrigerant. The blower 13 is coupled to the rotating shaft of the motor 20 shown in FIG. 2 to rotate.

Since the outdoor unit 10 of the multi-type air conditioner is connected to a plurality of indoor units, it has a large heat exchange capacity. In order to increase the heat exchange capacity as described above, it is common to place the heat exchanger 13 on four sides or two side surfaces, inhale air to the side of the outdoor unit 10, and discharge the heat-exchanged air upwards.

As such, the motor 20 is installed in the vertical direction to suck the air to the side and discharge the air upward.

FIG. 2 illustrates a motor 20 installed in the outdoor unit 10 of the multi-type air conditioner illustrated in FIG. 1 to drive the blowing fan 12.

The motor 20 includes a case 21 forming a body, a stator (not shown) for forming a rotating magnetic field by stacking a plurality of iron cores, winding a coil, and flowing a current through the coil, and the stator. It is provided with a rotor (not shown) that is rotated by a rotating magnetic field to generate a driving force.

Since various parts are accommodated in the case 21, the case 21 is usually manufactured separately from the upper case 21a and the lower case 21b and then coupled to each other by a method such as welding.

A lead wire 25 is provided to apply a current to the stator. A lead port 22 is formed at a side surface of the case 21 so that the lead wire 25 is drawn out of the case 21.

However, even when the upper case 21a and the lower case 21b are joined by welding or the like, a gap occurs in a contact portion where the lower surface of the upper case 21a and the upper surface of the lower case 21b contact each other. In addition, moisture, such as rainwater, penetrates into a gap formed in the contact portion between the upper case 21a and the lower case 21b.

In addition, moisture also penetrates through the outlet 22 formed in the side surface of the case 21.

As such, when moisture penetrates into the case 21 and the moisture remains inside the case 21, it causes a failure in various components mounted in the case 21.

Therefore, various components installed in the case cause a failure, and there is a problem in that the reliability of the motor cannot be guaranteed.

The present invention provides a motor that can prevent moisture from penetrating into a case of a motor installed in an outdoor unit of an air conditioner, thereby preventing a component mounted in the case from failing.

In addition, even if water penetrates into the case of the motor, a motor capable of quickly discharging the remaining water in the case is provided.

The motor according to the present invention is a stator, a rotor rotatably installed on the stator, a case in which an upper case and a lower case are coupled to accommodate the stator and the rotor, and water penetrates into the case. It includes a means for preventing water penetration and water discharge means for discharging the water penetrated into the case.

The water penetration preventing means includes an extension rib extending from the upper case and surrounding the outer periphery of the upper surface of the lower case.

Each of the upper case and the lower case has an upper fastening boss and a lower fastening boss to which the fastening member is fastened, and the water penetration preventing means includes a predetermined gap formed in the upper fastening boss and the lower fastening boss.

In addition, the moisture penetration preventing means includes an opening formed in the bottom surface of the lower case so that the lead wire for applying current to the stator is drawn out.

In addition, a rubber bushing having a through hole is installed in the opening so that the lead wire can pass therethrough, and the through hole has a cross shape.

In addition, a plurality of elastic pieces are provided around the through hole to press the lead wire through the through hole.

On the other hand, the rubber bushing is in contact with the end of the lower case forming the opening to support the rubber bushing to the lower case, and protrudes out of the lower case is supported on the outer surface of the lower case An outer rib and an inner rib which protrudes into the lower case and is supported by an inner surface of the lower case.

The water discharge means includes a discharge hole provided in the bottom surface of the lower case to discharge the water introduced into the case.

In addition, a control unit for detecting an electrode change of the magnet provided in the rotor, the discharge hole is formed in a position adjacent to the control unit. In addition, the motor is used in an outdoor unit for an air conditioner, it is preferable to be installed in the vertical direction in the outdoor unit.

According to the motor according to the invention it is possible to prevent the penetration of moisture into the motor casing to prevent the components mounted in the casing failure to ensure the reliability of the motor.

In addition, even if moisture penetrates into the motor case, moisture can be quickly discharged, thereby preventing various components mounted inside the motor from being broken by moisture.

Hereinafter, a motor according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

3 is an exploded perspective view of a motor according to an embodiment of the present invention, Figure 4 is a side view of the motor shown in FIG.

The motor according to an embodiment of the present invention can be used for outdoor units of the air conditioner. In particular, it will be described that the plurality of indoor units are used in the outdoor unit of the system air conditioner connected to one outdoor unit to form a refrigerant cycle and installed in the vertical direction.

3 and 4, the motor according to the present invention is a stator forming a rotating magnetic field by stacking a case 100 constituting a body and a plurality of iron cores, and then winding a coil to flow a current through the coil. 200 and a rotor (not shown) that is rotated by a rotor magnetic field formed by the stator 200 to generate a driving force.

The case 100 is separately manufactured as the upper case 110 and the lower case 120, and the upper case 110 and the lower case 120 are coupled to each other so that all the parts inside the case 100 are accommodated and fixed. Can be. The upper case 110 and the lower case 120 may be combined by welding or the like, but the upper and lower cases 110 and 120 may be disposed on the outer surfaces of the upper and lower cases 110 and 120 to facilitate repair when a component mounted in the case 100 fails. It is preferable to be coupled by fastening screws or the like through the fastening holes formed in the fastening bosses 111 and 121 respectively provided.

The lower case 120 is provided with a bracket 125 having a fastening hole so that the motor can be installed in an outdoor unit of the air conditioner. The bracket 125 is preferably formed integrally with the lower case 120 in the same manner as die casting.

The case 100 may be formed of various materials. For example, it can be formed of aluminum that is resistant to corrosion and easy to mold, and can be easily manufactured through aluminum die casting. Since the aluminum material is very excellent in thermal conductivity, it can conduct heat generated inside the motor very quickly, which is advantageous for heat dissipation.

The stator 200 installed inside the case 100 includes a stator core 210 formed by stacking a plurality of ring-shaped iron cores and a winding unit 220 formed along an inner circumference of the stator core 210, and the winding unit. Coil 230 is wound around 220 to generate a rotating magnetic field. When the coil is wound around the stator core 210, the stator core 210 is wrapped with the insulator 240 and the coil is wound around the insulator 240. The coil 230 is connected to the lead wire 250 for supplying current to the motor to receive current from the lead wire 250.

The lower case 120 is coupled to the control unit 300 having a plurality of Hall sensors (not shown) for detecting the electrode change of the magnet formed in the rotor. The control unit 300 may be installed in the upper case 110 or the lower case 120, but in the present embodiment, the control unit 300 has been shown to be installed in the lower case 120.

As illustrated in FIG. 5, the controller 300 may include a circuit board 310 on which a plurality of Hall sensors (not shown) are mounted, and a housing 320 surrounding the circuit board 310. The housing 320 is formed with a curved surface having a curvature radius equal to the curvature radius of the rotor, and includes a main body 321 surrounding the circuit board and ribs 322 protruding from both sides of the main body 321. .

Of course, the circuit board 310 may be directly coupled to the case 100 without the housing 320, but the circuit board 310 may be housed to protect the circuit board 310 on which the Hall sensor is mounted from moisture or external impact. After coupling with the 320, it is preferable to couple the housing 320 to the lower case 120. When the circuit board 310 is coupled to the housing 320, the circuit board 310 may be coupled using various coupling methods such as screws or hooks.

The motor according to the present invention may be installed in an outdoor unit of an air conditioner. As such, when the motor is installed outdoors, moisture such as rainwater may penetrate into the case 100. If moisture penetrates into the case 100, various components mounted inside the case 100 may cause a failure.

Therefore, even if the motor according to the present invention is installed outdoors, it has a structure capable of preventing the penetration of moisture into the case 100.

6 is an enlarged view of a contact portion in which the upper case 110 and the lower case 120 abut each other.

As shown in FIG. 6, the upper case 110 of the motor according to the present invention surrounds the outer circumference of the contact portion 150 in which the lower surface of the upper case 110 and the upper surface of the lower case 120 contact each other. An extension rib 115 protrudes from the outer circumferential surface of the upper case 110 and extends downward. When the upper case 110 and the lower case 120 are coupled by the extension ribs 115, the upper surface of the lower case 120 is inserted into the extension ribs 115 and the lower end of the upper case 110 is provided. It comes in contact with the face. As the extension ribs 115 are formed as described above, even if rainwater flows down the upper case 110, the contact portions 150 where the extension ribs 115 contact the lower surface of the upper case 110 and the upper surface of the lower case 120 abut. ), So that moisture can be prevented from penetrating into the case 100. The outer circumferential surfaces of the contact portion 150 and the extension ribs 115 are formed to have a predetermined distance from each other, and since the lower end of the extension rib 115 is positioned below the contact portion 150, the outer circumferential surface of the extension ribs 115 is formed. Moisture flowing down will not flow to the contact portion 150.

FIG. 7 is a cross-sectional view of the fastening bosses 111 and 121 provided in the upper case 110 and the lower case 120 to couple the upper case 110 and the lower case 120 to each other.

The lower end of the upper fastening boss 111 formed on the upper case 110 coincides with the lower end of the extension rib 115, and the upper end of the lower fastening boss 121 formed on the lower case 120 is the lower case 120. Is located below the top of the. Therefore, when the lower surface of the upper case 110 and the upper surface of the lower case 120 is in contact with each other, the upper fastening boss 111 and the lower fastening boss 121 is spaced at a predetermined interval. The inner circumferential surface of the upper fastening boss 111 and the outer circumferential surface of the lower case 120 are spaced at predetermined intervals.

As described above, the upper fastening boss 111 and the lower fastening boss 121 are fastened by a fastening member such as a screw. Since the upper fastening boss 111 and the lower fastening boss 121 are spaced apart from each other, and the inner circumferential surface of the upper fastening boss 111 is spaced apart from the outer circumferential surface of the lower case 120, moisture outside the case 100 may be lost. By breaking the path moving to the inside (100) it is possible to prevent the penetration of moisture into the case (100).

As shown in FIG. 8, the lower case 120 is provided with an installation unit 129 for installing the control unit 300. The installation unit 129 may be formed to protrude upward from the bottom surface of the lower case 120 in order to prevent the control unit 300 from contacting with moisture when the moisture is accumulated in the lower case 120.

In addition, an opening 126 in which the lead wire 250 for applying power to the stator 200 is drawn out of the case 100 on the bottom surface of the lower case 120 to prevent moisture from penetrating into the case 100. ) Is provided.

As such, since the opening 126 is provided on the bottom surface of the lower case 120, the water flowing along the case 100 may be reduced into the case 100 through the opening 126.

However, since water flowing down along the side of the case 100 may flow into the opening 126 along the bottom surface of the lower case 120, the opening 126 may have a bottom surface of the lower case 120. A rubber bushing 400 is installed to prevent rainwater flowing down along the road.

As shown in FIG. 9, the rubber bushing 400 is in contact with an end portion of the lower case 120 forming the opening 126 to be supported when the rubber bushing 400 is coupled to the opening 126. When the support part 410 and the rubber bushing 400 is coupled to the opening 126, the outer rib 420 protrudes out of the lower case 120 to be supported on the outer surface of the lower case 120. The inner rib 430 protrudes inward of the lower case 120 and is supported on an inner surface of the lower case 120.

The outer rib 420 and the inner rib 430 are formed to be stepped with the support part 410, respectively, so that the rubber bushing 400 is separated from the opening part 126 when the rubber bushing 400 is coupled to the opening part 126. It may be prevented from being separated, and rainwater flowing along the bottom surface of the lower case 120 may be prevented from flowing into the case 100 through the opening 126.

The rubber bushing 400 has a through hole 440 formed to penetrate the lead wire 250 at a central portion thereof. The through hole 440 is formed by cutting the center portion of the rubber bushing 400 in a cross shape. A cross-shaped through hole 440 is provided in the central portion, and a plurality of elastic pieces 445 are provided around the through hole 440. Therefore, when the lead wire 250 passes through the through hole 440, the elastic pieces 445 widen the through hole 440. After the lead wire 250 passes through the through hole 440, the elastic pieces 445 are elastically restored. The lead wire 250 is crimped and fixed. Therefore, a gap formed between the through hole 440 and the lead wire 250 of the rubber bushing 400 is minimized to prevent moisture from penetrating through the through hole 440.

10 illustrates a state in which the control unit 300 and the rubber bushing 400 are mounted on the lower case.

The motor according to the present invention has a structure for blocking the penetration of moisture into the case 100 as described above, but it is practically impossible to completely block the penetration of moisture into the case 100.

Therefore, when moisture penetrates into the case 100, the bottom of the lower case 120 as illustrated in FIGS. 8 and 10 to quickly discharge the water inside the case 100 to the outside of the case 100. The discharge hole 127 is provided on the surface.

The discharge hole 127 quickly discharges the moisture penetrated into the case 100 to prevent the moisture penetrated into the case 100 from contacting the components installed in the case 100. Therefore, even if moisture penetrates into the case 100, the components installed in the case 100 may be prevented from failing.

The discharge hole 127 is preferably provided in plurality in order to discharge the water well, the position is in the installation unit 129, the hall sensor assembly 300 is installed as shown in Figure 8 and 10 It is preferably formed adjacent. As the discharge hole 127 is formed in this way, the moisture introduced into the case 100 may be quickly discharged to the outside of the case 100.

As described above, the motor according to the present invention has a structure for preventing moisture from penetrating into the case 100 and a structure for quickly discharging moisture penetrated into the case 100. Therefore, various parts installed in the case 100 may be prevented from coming into contact with moisture and ensuring reliability of the motor.

1 is a perspective view showing the outdoor unit structure of a general air conditioner.

Figure 2 is a side view of the motor installed in the air conditioner shown in FIG.

3 is an exploded perspective view of a motor according to the present invention.

4 is a front view of the motor shown in FIG.

5 is a perspective view of a control unit mounted to the motor shown in FIG.

Figure 6 is an enlarged view of the coupling portion of the upper case and the lower case in FIG.

Figure 7 is an enlarged view of the upper fastening portion and the lower fastening portion in FIG.

Figure 8 is a perspective view before the control unit and the rubber bushing coupled to the lower case.

9 is a perspective view of the rubber bushing coupled to the lower case.

10 is a view showing that the control unit and the rubber bushing is installed in the lower case.

** Description of the main parts of the drawing **

100: case 115: extended rib

127: discharge hole 150: contact portion

300: control unit 400: rubber bushing

Claims (11)

With the stator, A rotor rotatably installed on the stator; A case formed by combining an upper case and a lower case to accommodate the stator and the rotor; Moisture penetration preventing means for preventing moisture from penetrating into the case; A motor comprising a water discharge means for discharging the water penetrated into the case. The method of claim 1, The water penetrating preventing means includes an extension rib extending from the upper case to surround the outer periphery of the upper surface of the lower case. The method of claim 1, Each of the upper case and the lower case has an upper fastening boss and a lower fastening boss to which the fastening member is fastened, and the moisture penetration preventing means includes a predetermined gap formed in the upper fastening boss and the lower fastening boss. motor. The method of claim 1, The water penetrating preventing means includes an opening formed in the bottom surface of the lower case so that the lead wire for applying current to the stator is drawn out. The method of claim 4, wherein And a rubber bushing having a through hole in the opening to allow the lead wire to pass therethrough. The method of claim 5, The through hole is characterized in that the motor is provided in the cross shape. The method of claim 6, And a plurality of elastic pieces are formed around the through holes to press the lead wires through the through holes. The method of claim 5, The rubber bushing is in contact with an end portion of the lower case forming the opening so that the rubber bushing is supported by the lower case, and an outer rib which protrudes out of the lower case and is supported by an outer surface of the lower case. And an inner rib which protrudes inwardly of the lower case and is supported by an inner surface of the lower case. The method of claim 1, The water discharging means is a motor, characterized in that it comprises a discharge hole provided in the bottom surface of the lower case to discharge the water introduced into the case. The method of claim 9, And a control unit for sensing an electrode change of the magnet provided in the rotor, wherein the discharge hole is formed at a position adjacent to the control unit. The method of claim 1, The motor is used in the outdoor unit for the air conditioner, the motor, characterized in that installed in the vertical direction in the outdoor unit.

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