JP2010142045A - Molded motor and air conditioner outdoor unit with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molded motor which prevents entry of droplets while holding an end bracket stably and drains water without fail even if the droplets enter inside or the dew condenses. <P>SOLUTION: The molded motor includes a stator 740 having a cylindrical mold resin 720 with an opening 725 that is formed by molding together a coil and a stator core with a resin, and a rotor disposed on the inner diameter side of the stator 740. A circuit board is disposed on the inner peripheral side of the mold resin 720, and the end bracket is press fitted on the inner peripheral side of the mold resin 720 to block up the opening 725. The mold resin 720 is provided with a recessed groove 726 so formed on its inner peripheral side as to extend along the rotation axis of the rotor toward the opening 725, and also a drain hole is formed to communicate from the inner peripheral side to the outer peripheral side in the mold resin 720. The groove 726 has a taper 726a formed to slope toward an end face 725c of the mold resin 720. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a drainage structure for a molded electric motor.

  Conventionally, a molded electric motor has been used as various drive sources for electric devices. This molded motor must have sufficient performance commensurate with the environmental conditions of use of the electrical equipment.

  For example, when using such a molded electric motor as a fan motor for driving a blower fan provided in an outdoor unit of an air conditioner, it is an electric device installed outdoors, so that it is affected by wind and rain. There must be. Therefore, mold motors do not cause malfunction or failure due to water droplets entering inside from the contact part between the mold resin part and the end bracket, or condensation occurring inside due to the temperature difference between inside and outside. It is necessary to devise as follows.

  As shown in FIGS. 10 and 11, the molded motor that prevents this malfunction and failure is used when the rotating shaft 5 of the rotor 4 is used in a horizontal state with respect to an electric device installed outdoors. Some have a structure for draining water droplets that have entered the mold electric motor or dew condensation that has occurred inside (for example, see Patent Document 1).

  This mold motor is provided with a mold resin portion 9 that is integrally molded by placing a stator core 1 and a coil 2 in a molding die and pouring a synthetic resin therein. A taper portion 9a that gradually inclines toward the end bracket 7 in the rotation axis direction of the rotation shaft 5 of the rotor 4 is provided on the entire inner circumference side of the mold resin portion 9, and a drain hole 7a is formed at the lower end portion of the end bracket 7. It has been provided.

  With such a structure, water droplets that have entered the mold electric motor and dew condensation that has occurred inside the mold electric motor are not directed toward the stator core 1 due to the inclination of the tapered portion 9a, but toward the drain hole 7a through the tapered portion 9a. The water droplets that flow and invade and water droplets caused by dew condensation generated inside are drained from the drain hole 7a.

  However, in the mold motor of Patent Document 1, the end bracket 7 is only attached to the end surface side of the mold resin portion 9, the contact area between the end bracket 7 and the mold resin portion 9 is small, and the water droplet intrusion path is provided. Because it is shorter, water drops easily penetrated.

This drawback can be solved by press-fitting the end bracket 7 into the inner peripheral side of the mold resin portion 9 to increase the contact area between the end bracket 7 and the mold resin portion 9 and lengthen the water droplet intrusion path. Although it can be considered, since the taper portion 9a inclined toward the end bracket 7 is provided in the mold motor of Patent Document 1, the end bracket 7 is press-fitted to the inner peripheral side of the mold resin portion 9 and stably held. There was a problem that could not be done.
JP-A-57-20136 (first page-second page, FIG. 2, FIG. 3)

  In view of the above-mentioned problems, the present invention prevents the intrusion of water droplets while stably holding the end bracket, and can reliably drain water even if water droplets intrude into the interior or there is condensation in the interior. An object of the present invention is to provide an electric motor and an outdoor unit of an air conditioner including the same.

  In order to solve the above-mentioned problems, the present invention provides a stator in which a coil and a stator core are integrally molded with resin to form a cylindrical molded resin portion having an opening, A rotor provided on the inner diameter side of the stator, a circuit board is disposed on the inner peripheral side of the mold resin portion, and an end bracket is disposed on the inner peripheral side of the mold resin portion so as to close the opening. In the press-fitted mold motor, a concave groove extending toward the opening along the rotational axis direction of the rotor is provided on the inner peripheral side of the mold resin portion, and from the inner peripheral side to the outer peripheral side in the mold resin portion. A drainage port that communicates is provided, and a tapered portion that is inclined toward the end surface of the mold resin portion is formed in the concave groove.

  According to a second aspect of the present invention, in the molded electric motor according to the first aspect, the tapered portion is inclined toward the drain port.

  According to a third aspect of the present invention, in the molded electric motor according to the first or second aspect, a terminal connected to the circuit board is disposed in the concave groove.

  According to a fourth aspect of the present invention, in the molded electric motor according to the third aspect, a fastening component for fastening the end bracket is disposed on the end surface of the mold resin portion.

  According to a fifth aspect of the present invention, in the molded electric motor according to any one of the first to fourth aspects of the present invention, the rotating shaft direction of the rotor is in a horizontal state and the drain port is on the lower side. It has a configuration characterized by being mounted on the outdoor unit of the machine.

  According to the first aspect of the present invention, in the mold motor in which the end bracket is press-fitted to the inner peripheral side of the mold resin portion so as to close the opening of the mold resin portion, the rotation axis of the rotor is arranged on the inner peripheral side of the mold resin portion. A concave groove extending toward the opening along the direction is provided, a drain port communicating from the inner peripheral side to the outer peripheral side is provided in the mold resin portion, and a tapered portion inclined toward the end surface of the mold resin portion is provided in the concave groove. Formed. This prevents the ingress of water droplets while keeping the end bracket stable, and prevents water droplets from flowing to the circuit board placement side in the event of water intrusion or condensation. It can be drained.

  Moreover, according to this invention of Claim 2, a taper part inclines toward a drain outlet. Thereby, while being able to obtain the same effect as that of the first aspect of the present invention, water droplets flow on the inner peripheral side of the mold resin portion and can be surely drained from the drain outlet.

  According to the third aspect of the present invention, the terminal connected to the circuit board is disposed in the concave groove. As a result, the same effect as that of the present invention according to claim 1 or 2 can be obtained, and the circuit board can be enlarged without increasing the outer diameter size of the molded electric motor. Since a control IC can be mounted, a compact and high-power molded motor can be obtained.

  According to the present invention, the fastening component for fastening the end bracket is arranged on the end surface of the mold resin portion. Thereby, the same effect as that of the present invention can be obtained, and the end bracket can be firmly held in the mold resin portion.

  Furthermore, according to the present invention described in claim 5, the molded electric motor according to any one of claims 1 to 4 is arranged such that the rotational axis direction of the rotor is horizontal and the drain outlet is on the lower side. It was installed in an outdoor unit of an air conditioner. As a result, even if the mold motor is mounted on the outdoor unit of the air conditioner, it is possible to prevent the intrusion of rainwater or the like into the inner periphery of the mold resin part, and in the unlikely event that water drops enter or condensation occurs. However, water can be reliably drained while preventing water droplets or the like from flowing to the circuit board arrangement side.

  Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 is an external perspective view showing an outdoor unit of an air conditioner according to the present invention, FIG. 2 is a perspective view showing an internal structure of the outdoor unit of the air conditioner according to the present invention, and FIG. 3 is a front view of a compressor room shown in FIG. FIG. 4 is a plan view schematically showing the internal structure of the outdoor unit of the air conditioner according to the present invention, and FIG. 5 is a cross-sectional view showing the internal structure of the molded electric motor according to the present invention. 6 is a partial sectional view corresponding to the arrow a in FIG. 4 showing the internal structure of the molded motor according to the present invention, FIG. 7 is a left side view showing a state where the end bracket of the molded motor in FIG. 6 is removed, and FIG. FIG. 9 is a cross-sectional view showing a mold resin portion forming the stator of the molded motor according to the present invention. FIG.

  The air conditioner according to the present invention is an outdoor unit that is affected by wind and rain of an apartment or a detached house, an indoor unit that is indoors, and the outdoor unit and the indoor unit that are connected by a refrigerant pipe. As shown in FIGS. 1 to 4, the main body 100 of the outdoor unit of the air conditioner includes a suction port A on the back surface and the left side surface, and an air outlet B on the front surface, and a lattice-shaped fan guard at the air outlet B. A front panel 100d having 100e is provided.

  The main body 100 includes a bottom plate 100a on the bottom surface, a leg portion 200 for installing the main body 100 on the ground below the bottom plate 100a, and a partition plate 300 extending vertically upward from the bottom plate 100a. Yes. With the partition plate 300, the inside of the main body 100 has a heat exchanger chamber 100b provided with a heat exchanger 400 formed in a substantially L shape from the back surface to the left side surface, and a compressor chamber 100c provided with a compressor 500. It is divided into and.

  In the heat exchanger chamber 100 b, an air passage connecting the suction port A and the outlet B is formed, and a heat exchanger 400 is provided in the air passage so as to face the suction port A. In addition to the heat exchanger 400, A blower fan 600 is provided facing the air outlet B. The heat exchanger chamber 100b is provided with a mold electric motor 700 for driving the blower fan 600 and a motor support 800 for supporting the mold electric motor 700 in the air passage.

  The molded electric motor 700 is attached between the blower fan 600 and the motor support 800 with the rotation axis direction of the rotor 750 described later in a substantially horizontal state and the drain port 771 on the lower side, and the motor support 800 is heated. It is attached close to the exchanger 400. A cable outlet 770 having a drain port 771 is attached to a lower end 720a of the molded electric motor 700 described later. Further, an electrical component box 900 is disposed above the compressor 500 in the compressor chamber 100c, and a control board 900a for controlling the outdoor unit, an electrolytic capacitor 900b, and the like are disposed in the electrical component box 900.

  During operation of the outdoor unit of the air conditioner configured as described above, the heat exchanger chamber 100b becomes negative pressure due to the operation of the blower fan 600, so that the rear side and the left side of the main body 100 are drawn from the suction port A. The air sucked through the heat exchanger 400 is blown out of the outdoor unit through the blower fan 600 through the opening of the fan guard 100e provided in the front panel 100d. At this time, if water droplets are mixed in the sucked air, it adheres to the housing 710 of the mold motor 700, and from a gap of the mold motor 700, for example, a gap between the end surface 725c of the mold resin portion 720 and the end bracket 730 described later. There is a risk of water droplets entering inside.

  Further, when the outdoor unit of the air conditioner is operated or stopped, if there is a temperature difference between the inside of the heat exchanger chamber 100b and the outside of the outdoor unit, condensation may occur inside the mold electric motor 700. The present invention, as the molded electric motor 700, prevents the ingress of water droplets while stably holding the end bracket 730, and even if water droplets intrude or condensation occurs, the water droplets or the like are disposed on the circuit board. The structure which can drain reliably, preventing flowing to the side is the characteristics.

  Next, the mold motor 700 will be described in detail. As shown in FIGS. 5, 6, and 9, the molded electric motor 700 includes a stator core 721 having a plurality of (for example, twelve) teeth 721 a and a tooth surface of the teeth 721 a around the stator core 721. An insulator 722 formed of a synthetic resin except for 721b, a coil 723 wound around the insulator 722, and a cylindrical mold resin portion 720 in which a bearing housing portion 724 is integrally molded with a synthetic resin are provided. .

  Further, one end of the mold resin portion 720 is provided with an opening 725, and a steel plate end bracket 730 is provided so as to close the opening 725. Thus, the stator 740 is formed by the mold resin portion 720, and the housing 710 of the mold electric motor 700 is formed by the mold resin portion 720 and the end bracket 730.

  A cylindrical rotor 750 is arranged on the inner peripheral side of the stator 740 with a predetermined gap in the radial direction of the stator 740. The rotor 750 has a plurality of (for example, eight) permanent magnets 751 on the outer periphery and a rotor rotation shaft 752 at the center. A pair of bearings 753 and 754 are fixed to the rotor rotation shaft 752.

  One bearing 753 is accommodated in a bearing accommodating portion 724 molded in the mold resin portion 720, and the other bearing 754 is accommodated in a bearing accommodating portion 733 formed in the end bracket 730. The rotor rotating shaft 752 protrudes outside the housing 710 through the molded bearing housing portion 724 and the molded resin portion 720. Further, the blower fan 600 is attached to the projecting rotor rotation shaft 752.

  Next, the structure of the holding portion between the end bracket 730 and the mold resin portion 720 will be described in detail. First, as shown in FIG. 5 and FIG. 6, the end bracket 730 has a peripheral portion 731 and a fitting portion 732 inside the peripheral portion 731 by providing a step on the peripheral edge of the steel plate punched into a disc shape. A bearing housing portion 733 in which the bearing 754 is housed is formed at the center of the steel plate of the fitting portion 732.

  On the other hand, as shown in FIGS. 5 to 9, the mold resin portion 720 has an end 725 c of the mold resin portion 720 in the opening 725 and an end along the rotational axis direction of the rotor 750 from the inner peripheral side of the end surface 725 c. A press-fitting portion 725b into which the bracket 730 is press-fitted is formed. The press-fit portion 725b and the rotor rotation shaft 752 are substantially parallel, and the press-fit portion 725b and the fitting portion 732 of the end bracket 730 are also in a substantially parallel relationship, so that the end bracket 730 is connected to the inner periphery of the mold resin portion. Can be press-fitted to the side. Further, an arrangement portion 725a on which a circuit board 760 on which a drive control IC (not shown), a connector 762 and the like are mounted is arranged from the press-fit portion 725b toward the inner diameter direction.

  With such a configuration, when the fitting portion 732 of the end bracket 730 is press-fitted into the press-fit portion 725b of the mold resin portion 720, the end bracket 730 can be stably held on the mold resin portion 720. Further, since the surface extending from the peripheral edge portion 731 of the end bracket 730 to the fitting portion 732 comes into contact with the surface extending from the end surface 725c of the mold resin portion 720 to the press-fit portion 725b, the end bracket 730 and the mold resin portion 720 are in contact with each other. The area of the contact surface is increased, and infiltration of rainwater and the like can be prevented more reliably.

  As shown in FIGS. 6 to 8, the cable 762a connected to the connector 762 mounted on the circuit board 760 is a lower end portion 720a of the mold resin portion 720 and a notch portion 725d in which a part of the opening portion 725 is notched. It is wired outside the housing 710 through the cable outlet 770 attached to the housing 710. The cable outlet 770 is formed with a fitting portion 771 that fits into the notch 725, an opening 772 through which the cable 762a passes, and a drain port 773.

  In addition, although the cable extraction part 770 fits into the notch part 725d of the mold resin part 720, it may be integrally formed with the lower end part 720 of the mold resin part 720. Further, although the drain outlet 773 is formed in the cable outlet 770, the drain outlet 773 is separated from the cable outlet 770, and the drain outlet 773 is formed integrally with the lower end portion 720 of the mold resin portion 720. It may be.

  A plurality of concave grooves 726 extending from the placement portion 725a toward the end surface 725c are provided on the inner peripheral surface of the mold resin portion 720 where the press-fitting portion 725b is provided. In these concave grooves 726, pin terminals 727 as terminals to be soldered and connected to the circuit board 760 are disposed. Note that a terminal such as a tab terminal other than the pin terminal 727 may be applied as the terminal. With such a configuration, the circuit board 760 can be enlarged by the amount of the concave groove 726 without increasing the outer diameter size of the molded electric motor 700. As a result, a large drive control IC (not shown) can be mounted on the circuit board 760, so that a compact and high-power molded motor 700 can be obtained.

  On the other hand, by providing the concave groove 726, a part of the end surface 725c of the mold resin portion 720 is cut out. As a result, water droplets may enter the concave groove 726 from the gap between the end bracket 730 and the end surface 725 c of the mold resin portion 720, and the water droplets may reach the circuit board 760. Therefore, when the invading water droplets contact the circuit board 760, in the worst case, a circuit on the circuit board 760 may cause a short circuit or the circuit board 760 may be corroded, which may cause a problem in the mold motor 700.

  For this reason, in the molded electric motor 700 of the present invention, a tapered portion 726a that is inclined toward the end surface 725c of the mold resin portion 720 is formed in the concave groove 726. As a result, even if water droplets enter from the gap between the end surface 725c of the mold resin portion 720 and the end bracket 730, or if there is condensation inside due to a temperature difference between the inside and outside, water droplets or the like are directed to the arrangement side of the circuit board. It can be prevented from flowing.

  Further, the tapered portion 726 a formed in the concave groove 726 is formed so as to be inclined toward the drain port 773 as well as inclined toward the end surface 725 c of the mold resin portion 720. As a result, water droplets are transmitted along the inner peripheral side of the mold resin portion 720 and are surely drained from the drain port 773.

  Further, as shown in FIGS. 6 and 7, an insert nut as a plurality of fastening parts for fastening the end bracket 730 to the mold resin portion 720 using a plurality of bolts 734 is provided on the end surface 725 c of the mold resin portion 720. 728 is arranged. The insert nuts 728 are arranged on the end surface 725c of the mold resin portion 720 at intervals along the circumferential direction so as not to overlap the plurality of concave grooves 726.

  On the other hand, a through-hole for penetrating a plurality of bolts 734 corresponding to a plurality of insert nuts 728 (not shown) is formed in the peripheral edge portion 731 of the end bracket 730. With such a configuration, the end bracket 730 is fastened to the insert nut 728 disposed on the end surface 725c of the mold resin portion 720 by the bolt 734 penetrating the through hole.

  As a result, the insert nut 728 is disposed along the circumferential direction of the end surface 725c at a location that does not overlap the concave groove 726 with respect to the end surface 725c of the mold resin portion 720, so that the outer diameter size of the mold motor 700 is not increased. The end bracket 730 is firmly held in the mold resin portion 720 in addition to being held by press fitting. Although the insert nut 728 is used as the fastening part, a fastening part other than the insert nut 728 may be used. For example, after molding the mold resin portion 720, a hole may be made in the end surface 725c, and a nut may be attached thereto.

  Further, as shown in FIG. 7, a sealing material 780 for stopping water droplets from the outside of the mold motor 700 is disposed on the end surface 725 c of the mold resin portion 720. The sealing material 780 is provided along the outer peripheral side of the recessed groove 726 and along the inner peripheral side of the insert nut 728. In this embodiment, a liquid gasket is used as the sealing material 780. The liquid gasket is in a liquid state when applied to the end face 725c, but then hardens at room temperature to form a rubber-like elastic body.

  Therefore, as in the present embodiment, when the groove 726 and the insert nut 728 are provided on the end surface 725c of the mold resin portion 720 and the sealing material 780 needs to be installed in a meandering manner, a liquid gasket is used. When used, workability is improved. Further, since the sealing material 780 is formed of an elastic body, the vibration generated by driving the rotor rotating shaft 752 is absorbed to prevent generation of noise. In the present embodiment, a liquid gasket is used as the sealing material 780. However, the present invention is not limited to this, and a gasket molded from an elastic material such as silicon or rubber may be used.

  Thereby, since the sealing material 780 is interposed in the gap between the end surface 725 c of the mold resin portion 720 and the end bracket 730, water droplets are prevented from entering the inner peripheral side of the mold resin portion 720. In addition, since the sealing material 780 is disposed on the end surface 725 c of the mold resin portion 720 along the inner peripheral side of the insert nut 728, a water droplet should be formed from the gap between the through hole formed in the end bracket 730 and the bould 734. Even if water enters, the sealing material 780 stops water.

  Moreover, the inclination by the taper part 726a formed in the ditch | groove 726 of the mold resin part 720 lengthens the extending surface distance L as an insulator from the peripheral part 731 of the end bracket 730 to the terminal pin 727, as shown in FIG. is doing. Thereby, the insulation effect between the end bracket 730 and the terminal pin 727 is improved.

  Further, the outer surface 733a of the bearing housing portion 733 formed on the end bracket 730 is formed at a position lower than the outer surface 731a of the peripheral edge portion 731 formed on the end bracket 730, as shown in FIG. As a result, the bearing housing portion 733 is not subjected to an impact from the outside, and failure of the bearing 754 and the rotor rotating shaft 752 housed in the bearing housing portion 733 is prevented.

  Furthermore, since the shape of the end bracket 730 is a structure that is press-fitted into the inner peripheral side of the mold resin portion 720, the outer diameter size of the mold electric motor 700 is larger than the structure that is press-fitted into the outer peripheral side of the mold resin portion 720. The steel plate material of the end bracket 730 is saved without increasing the size.

  In the outdoor unit of the air conditioner in which the mold motor 700 configured as described above is mounted, water drops are mixed in the air sucked from the suction port A through the heat exchanger 400, and the mold resin of the mold motor 700 is obtained. Even if water droplets enter from the gap between the portion 720 and the end bracket 730, or even if condensation occurs on the inner peripheral side of the mold resin portion 720 due to a temperature difference between the inside and outside of the mold electric motor 700, the water droplets or condensation Flows along the inner peripheral side of the mold resin portion 720 toward the drain port 773 due to the inclination of the tapered portion 726 a formed in the concave groove 726.

  That is, the water droplets and condensation are caused by the weight of the press-fitting part 725b formed in the opening 725 of the mold resin part 720 and the boundary between the press-fitting part 725b and the fitting part 732 of the end bracket 730 to the drain port 773 by its own weight. It is designed to flow toward you. Then, water droplets and condensation reaching the drain port 773 are drained from the drain port 773. Further, since the water droplets and dew condensation do not flow to the circuit board 760 and the terminal pins 727 due to the inclination of the tapered portion 726a formed in the concave groove 726, failure and malfunction of the mold motor 700 are prevented.

  In this embodiment, the molded electric motor 700 is mounted in an outdoor unit of an air conditioner that is disposed outdoors that is affected by wind and rain. However, the present invention is not limited to this, and a window that is attached to a window is used. You may make it mount this mold electric motor 700 as an electric motor which drives the ventilation fan of the outdoor side in an air conditioner.

  According to the mold motor 700 of the present invention described above, the circuit board 760 is disposed on the inner peripheral side of the mold resin portion 720, and the end bracket is disposed on the inner peripheral side of the mold resin portion 720 so as to close the opening 725. In the case where 730 is press-fitted, a concave groove 726 extending toward the opening 725 along the rotation axis direction of the rotor 750 is provided on the inner peripheral side of the mold resin portion 720, and the outer periphery from the inner peripheral side to the mold resin portion 720. Since the drain port 773 communicating with the side is provided, and the tapered portion 726a inclined toward the end surface 725c of the mold resin portion 720 is formed in the concave groove 726, so that the ingress of water droplets can be prevented while stably holding the end bracket 730, And even if water drops enter or condensation occurs, while preventing water drops from flowing to the circuit board placement side, It can be really draining.

  Further, since the tapered portion 726a is not only inclined toward the end surface 725c but also inclined toward the drain port 773, water droplets are transmitted along the inner peripheral side of the mold resin portion 720, and the drain port 773 is surely drained. Can do. Furthermore, since the terminal pin 727 connected to the circuit board 760 is disposed in the concave groove 726, the circuit board 760 can be enlarged without increasing the outer diameter size of the molded electric motor 700, and illustration of the board is omitted. Since a larger drive control IC can be mounted, a small and high-power molded motor 700 can be obtained.

It is an external appearance perspective view which shows the outdoor unit of the air conditioner by this invention. It is a perspective view which shows the internal structure of the outdoor unit of the air conditioner by this invention. It is a perspective view which shows the state which removed the front panel of the compressor chamber shown in FIG. It is a top view which shows typically the internal structure of the outdoor unit of the air conditioner by this invention. It is sectional drawing which shows the internal structure of the mold motor by this invention. It is a fragmentary sectional view equivalent to the a arrow of Drawing 4 showing the internal structure of the mold electric motor by the present invention. It is a left view which shows the state which removed the end bracket of the mold motor of FIG. It is an external appearance perspective view which shows the mold resin part which forms the stator of the mold motor by this invention. It is sectional drawing which shows the mold resin part which forms the stator of the mold motor by this invention. It is sectional drawing which shows the internal structure of the conventional mold motor. It is a right view of the mold motor of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Main body 100a Bottom plate 100b Heat exchanger room 100c Compressor room 100d Front panel 100e Fan guard 200 Leg part 300 Partition plate 400 Heat exchanger 500 Compressor 600 Blower fan 700 Mold electric motor 710 Housing 720 Mold resin part 720a Lower end part 721 Stator Iron core 721a Teeth 721b Teeth surface 722 Insulator 723 Coil 724 Bearing housing portion 725 Opening portion 725a Arrangement portion 725b Press fit portion 725c End surface 725d Notch portion 726 Concave groove 726a Tapered portion 727 Pin terminal 728 Insert nut 73 Fitting portion 733 Bearing housing portion 733a Outer surface 734 Bolt 740 Stator 750 Rotor 751 Permanent magnet 752 Rotor rotation Shaft 753 Bearing 754 Bearing 760 Circuit board 762 Connector 762a Cable 770 Cable extraction part 771 Fitting part 772 Opening 773 Drainage port 780 Sealing material 800 Motor support 900 Electric component box 900a Control board 900b Electrolytic capacitor A Suction port B Outlet L Surface distance

Claims (5)

  A coil and a stator iron core are integrally molded with resin to form a cylindrical mold resin portion having an opening, and a rotor provided on the inner diameter side of the stator, the mold resin portion In the mold motor in which a circuit board is disposed on the inner peripheral side of the mold resin and an end bracket is press-fitted on the inner peripheral side of the mold resin portion so as to close the opening, the rotor is disposed on the inner peripheral side of the mold resin portion. A concave groove extending toward the opening along the rotation axis direction of the mold resin portion, and a drain outlet communicating with the mold resin portion from the inner peripheral side to the outer peripheral side is provided on the end surface of the mold resin portion. A molded electric motor characterized in that a tapered portion inclined toward the surface is formed.   The mold motor according to claim 1, wherein the tapered portion is inclined toward the drain port.   3. The mold motor according to claim 1, wherein a terminal connected to the circuit board is disposed in the concave groove.   The mold motor according to claim 3, wherein a fastening component for fastening the end bracket is disposed on an end surface of the mold resin portion. An air conditioner comprising: the molded electric motor according to any one of claims 1 to 4 mounted so that a rotational axis direction of the rotor is in a horizontal state and the drain port is on a lower side. Outdoor unit.

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