WO2017104430A1

WO2017104430A1 - Outside unit of air conditioner

Info

Publication number: WO2017104430A1
Application number: PCT/JP2016/085742
Authority: WO
Inventors: 裕人大貫; 俊輔藤; 貴範井上
Original assignee: 日本電産テクノモータ株式会社
Priority date: 2015-12-15
Filing date: 2016-12-01
Publication date: 2017-06-22
Also published as: JP2019032091A

Abstract

This outside unit of an air conditioner comprises a housing having an opening, a cover unit having a ventilation hole and covering the opening, a fan motor attached to the cover unit, a circuit board mounted on the fan motor, and a blocking unit which blocks water from reaching the circuit board via the boundary between the cover unit and the fan motor.

Description

Air conditioner outdoor unit

The present invention relates to an outdoor unit of an air conditioner.

Conventionally, as an air conditioner for a house, a separate type air conditioner divided into an outdoor unit and an indoor unit is known. The outdoor unit arranged outdoors and the indoor unit arranged indoors are connected by a refrigerant pipe penetrating the outer wall of the house, for example. *

Patent Document 1 discloses an outdoor unit of a separation type air conditioner. The outdoor unit of Patent Document 1 includes a casing. In the casing, a compressor, an axial fan, and an air heat exchanger located on the suction side of the axial fan are disposed. The axial fan faces an air circulation port serving as an air outlet of the casing. A fan guard is provided at the air circulation port. The fan guard has a disk portion located coaxially with the axial fan. Further, the fan guard has a grill portion that is on the outer periphery of the disc portion and serves as an outlet for airflow. A fan motor for driving the axial fan is fixed to the inner surface of the disk portion.

Japanese Utility Model Publication Sho 62-105433

In the configuration disclosed in Patent Document 1, for example, water may enter the inside of the outdoor unit from a grill portion or the like. For example, the water that has entered the interior may reach a circuit board mounted inside the fan motor. When water reaches the circuit board, the fan motor breaks down, so how to prevent water from entering the circuit board becomes a problem. *

In view of the above points, an object of the present invention is to provide an outdoor unit of an air conditioner having a structure in which water does not easily enter a circuit board mounted on a fan motor.

An exemplary outdoor unit of an air conditioner according to the present invention includes a housing having an opening, a cover portion having a vent hole to cover the opening, a fan motor attached to the cover portion, and the fan motor. And a blocking part that prevents water from reaching the circuit board through a boundary between the cover part and the fan motor.

According to the exemplary present invention, it is possible to provide an outdoor unit of an air conditioner having a structure in which water does not easily enter a circuit board mounted on a fan motor.

FIG. 1 is a schematic perspective view showing an appearance of an outdoor unit of an air conditioner according to an embodiment of the present invention. FIG. 2 is a schematic perspective view showing a state in which the casing of the outdoor unit of the air conditioner according to the embodiment of the present invention is removed. FIG. 3 is a schematic cross-sectional view of the fan motor included in the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 4 is a schematic diagram for explaining a water intrusion route. FIG. 5 is an enlarged schematic sectional view showing a part of the fan motor mounting structure according to the first embodiment of the present invention. FIG. 6 is a schematic diagram illustrating a first specific example of the first blocking unit. FIG. 7 is a schematic plan view showing the structure around the seal member in the first specific example. FIG. 8 is a schematic diagram showing a first modification of the first specific example. FIG. 9 is a schematic diagram illustrating a second modification of the first specific example. FIG. 10 is a schematic enlarged sectional view showing a second specific example of the first blocking portion. FIG. 11 is a schematic enlarged cross-sectional view showing a third specific example of the first blocking portion. FIG. 12 is an enlarged schematic sectional view showing a part of the fan motor mounting structure according to the second embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. In this specification, the direction of the central axis of the fan motor is simply referred to as “axial direction”, and the radial direction and the circumferential direction around the central axis of the fan motor are simply referred to as “radial direction” and “circumferential direction”. To do. One surface provided with an opening on the exhaust side of the outdoor unit is defined as the front surface of the outdoor unit. <1. General configuration of air conditioner outdoor unit>

First, a schematic configuration of an outdoor unit of an air conditioner according to an exemplary embodiment of the present invention will be described. FIG. 1 is a schematic perspective view showing an appearance of an outdoor unit 1 of an air conditioner according to an embodiment of the present invention. The outdoor unit 1 shown in FIG. 1 is a separate type air conditioner outdoor unit configured in combination with an indoor unit (not shown). The outdoor unit 1 is installed on, for example, an outdoor floor surface. *

The outdoor unit 1 has a housing 2 having an opening 3. The housing 2 is provided in a substantially rectangular box shape. The housing 2 is not particularly limited in material, but is composed of, for example, a synthetic resin part and a sheet metal part. The opening 3 is formed in the side wall 2 a on the front side of the housing 2. The opening 3 penetrates the side wall 2a. The shape of the opening 3 is not particularly limited, but is circular in this embodiment. The opening 3 is an exhaust port. An intake port (not shown) is provided on the back surface of the housing 2. *

The outdoor unit 1 has a cover portion 4 that has a vent hole 4 a and covers the opening 3. The cover portion 4 is provided in a circular shape corresponding to the shape of the opening 3. The shape of the cover part 4 may be other than a circle. The cover part 4 is a separate member from the housing 2. The cover 4 is not particularly limited, but is formed of, for example, a resin. The cover 4 is fixed to the side wall 2a using a fixing tool such as a screw. The cover portion 4 may be the same member as the housing 2. *

In detail, the cover part 4 has the disc part 40 in the center. The disc part 40 is located at the center of the opening 3. The cover portion 4 has a plurality of first ribs 41 extending from the disc portion 40 in the radial direction. The cover part 4 is arranged around the disk part 40 and has a plurality of second ribs 42 extending in the circumferential direction. A plurality of ventilation holes 4 a are formed between the plurality of

ribs

41 and 42. The plurality of

ribs

41 and 42 prevent human fingers from entering the housing 2 by mistake. The plurality of

ribs

41 and 42 can also prevent foreign matters from entering from the outside to the inside of the housing 2. *

FIG. 2 is a schematic perspective view showing a state where the casing 2 of the outdoor unit 1 of the air conditioner according to the embodiment of the present invention is removed. Inside the housing 2, a power supply unit 5, a compressor 6, a heat exchanger 7, a fan motor 8, and the like are housed. *

The power supply unit 5 is supported by, for example, a support unit 10 disposed in the housing 2. The support unit 10 is provided on the end side of the housing. The power supply unit 5 receives power supply from an external commercial power supply or the like, and generates a voltage necessary for the outdoor unit 1 to operate. The power supply unit 5 generates various voltages used in the outdoor unit 1 by performing rectification, step-down, step-up, etc. using an electric circuit (not shown). The power supply unit 5 supplies power to each component of the outdoor unit 1. *

The compressor 6 is installed on the bottom plate 9 of the outdoor unit 1. The compressor 6 is disposed below the power supply unit 5. The compressor 6 compresses the refrigerant used in the refrigeration cycle, and generates a high-temperature and high-pressure gaseous refrigerant. During the cooling operation, the refrigerant discharged from the compressor 6 is sent to the heat exchanger 7. During the heating operation, the refrigerant discharged from the compressor 6 is sent to the heat exchanger of the indoor unit. *

The heat exchanger 7 is installed on the bottom plate 9 of the outdoor unit 1. The heat exchanger 7 is provided in a wide range adjacent to the intake port on the back side of the housing 2. During the cooling operation, the refrigerant flows from the compressor 6 into the heat exchanger 7. During the heating operation, the refrigerant flows into the heat exchanger 7 from the heat exchanger of the indoor unit. When the fan motor 8 is driven, the outside air sucked into the housing 2 from the outside through the intake port passes through the heat exchanger 7. Heat exchange is performed between the outside air and the heat exchanger 7. *

The fan motor 8 is attached to the cover part 4. That is, the fan motor 8 is provided adjacent to the opening 3. A plurality of blades 8 a are attached to the fan motor 8. By driving the fan motor 8, the plurality of blades 8 a rotate to generate an air flow. Details of the configuration of the fan motor 8 and the mounting structure of the fan motor 8 to the cover portion 4 will be described later. *

In addition, the outdoor unit 1 has a four-way valve, an expansion valve, and the like (not shown). The four-way valve switches the refrigerant flow direction in different operation modes such as cooling operation and heating operation. The expansion valve is provided so that the opening degree can be controlled. <2. Fan motor configuration>

FIG. 3 is a schematic cross-sectional view of the fan motor 8 included in the outdoor unit 1 of the air conditioner according to the embodiment of the present invention. FIG. 3 also shows the cover portion 4 to which the fan motor 8 is attached. The fan motor 8 has a stationary part 80 and a rotating part 81. The stationary part 80 is fixed to the disk part 40. The rotating part 81 is supported to be rotatable with respect to the stationary part 80. *

The stationary part 80 has a stator 801. The stator 801 is an armature of the fan motor 8. The stator 801 has a magnetic stator core 801a having a plurality of teeth. Specifically, the stator core 801a is a laminated steel plate in which electromagnetic steel plates such as silicon steel plates are laminated in the axial direction. The stator core 801a has an annular core back disposed substantially coaxially with the central axis A. The plurality of teeth protrudes radially outward from the core back. Stator 801 has a conducting wire 801b wound around a plurality of teeth. Specifically, the conducting wire 801b is wound around a plurality of teeth via an insulator 801c. The insulator 801c electrically insulates the teeth and the conductor 801b by being interposed between the teeth and the conductor 801c.

The stationary portion 80 further includes a resin stator housing 802 that covers at least a part of the stator core 801a and the conductor 801b. The stator housing 802 is integrated with the stator 801 by insert molding, for example. The stator housing 802 holds a bearing portion 803 that rotatably supports the shaft 811. The bearing portion 803 is not particularly intended to limit the form, but is composed of, for example, a ball bearing. For example, a sleeve bearing or the like may be used instead of the ball bearing. *

The rotating part 81 has a shaft 811. The shaft 811 is a columnar member extending in the axial direction. The shaft 811 is made of a metal such as stainless steel, for example. The shaft 811 is supported by the bearing portion 803 and rotates about the central axis A. *

The rotating unit 81 includes a rotor 812 that holds a plurality of magnets 813. The rotor 812 is fixed with respect to the shaft 811 and rotates together with the shaft 811. The rotor 812 has a cylindrical portion 812 a and surrounds the outer peripheral surface of the stationary portion 80. The plurality of magnets 813 are fixed to the inner peripheral surface of the cylindrical portion 812a. The plurality of magnets 813 are located on the radially outer side of the stator 801. The plurality of magnets 813 are arranged at equal intervals in the circumferential direction, and N-pole magnetic pole faces and S-pole magnetic pole faces are alternately arranged. Instead of the plurality of magnets 813, one annular magnet in which N poles and S poles are alternately magnetized in the circumferential direction may be used. *

A plurality of blades 8 a are disposed on the outer peripheral surface of the rotor 812. The plurality of blades 8 a are the same member as the rotor 812 and rotate together with the rotor 812. The plurality of blades 8a may be separate members from the rotor 812. *

In addition, a circuit board 82 is mounted on the fan motor 8. On the circuit board 82, an electronic circuit for supplying a drive current to the conducting wire 801b is formed. The circuit board 82 is disposed on one end side in the axial direction of the stationary part 80. The one end side is a side close to the cover part 4 to which the fan motor 8 is attached. The circuit board 82 is fixed to the outer surface of the stator housing 802. The fixing method is not particularly limited, and for example, a fixing tool such as a screw can be used. In the present embodiment, the protrusions (not shown) provided on the stator housing 802 and the holes (not shown) provided on the circuit board 82 are fixed by fitting. More specifically, a snap fit is used for fixing, and the protrusion fitted in the hole is hooked on the circuit board 82 using elasticity. A circular opening is formed at the center of the circuit board 82. <3. Fan motor mounting structure> <3-1. First Embodiment>

Referring to FIG. 3, fan motor 8 has a mounting portion 84 having a screw hole for mounting screw 83. Specifically, the attachment portion 84 is provided on the outer peripheral portion of the stator housing 802 in the radial direction. The attachment portion 84 is located between the rotor 812 and the cover portion 4. The attachment portion 84 has a surface parallel to the radial direction. The attachment portion 84 is a part of the stator housing 802. A plurality of attachment portions 84 are formed in the circumferential direction. For example, the number of attachment portions 84 is four. Note that the attachment portion 84 may be a separate member from the stator housing 802.

The fan motor 8 has a protruding portion 85 that protrudes in the axial direction with respect to the mounting portion 84. The protruding portion 85 is located on the radially inner side of the mounting portion 84. The protruding portion 85 is a part of the stator housing 802. The protruding portion 85 has an annular shape substantially coaxial with the central axis A. The circuit board 82 is surrounded by the protruding portion 85. The cover part 4 has a hole 40a into which the protruding part 85 is inserted. Specifically, the hole 40 a is provided on the inner surface side of the disc part 40. The hole 40 a has a circular shape, and its center substantially coincides with the center of the disk portion 40. The hole portion 40 a does not penetrate the disc portion 40. *

The fan motor 8 is fixed to the disc part 40 in a posture in which the central axis A is perpendicular to the disc part 40. The fan motor 8 is fixed to the cover part 4 using screws 83 arranged in parallel with the axial direction. Specifically, the attachment portion 84 and the disc portion 40 that contacts the attachment portion 84 are fixed by screws 83. That is, the cover part 4 and the fan motor 8 are attached in contact with each other. In the fixed state, the protrusion 85 is inserted into the hole 40a. The center axis A of the fan motor 8 and the center of the disc part 40 are substantially coincident. The circuit board 82 faces the disc portion 40. *

FIG. 4 is a schematic diagram for explaining a water intrusion route. In FIG. 4, a thick broken line illustrates the water intrusion route. The structure shown in FIG. 4 is the same structure as the fan motor mounting structure of the present embodiment, but is a structure that does not take measures against water intrusion. For example, water may enter from the outside of the outdoor unit 1 through a gap between the screw hole 40 b provided in the disc part 40 and the screw 83. The infiltrated water may reach the circuit board 82 through a gap formed at the boundary between the disc portion 40 and the stator housing 802. Further, for example, water may enter the housing 2 through the vent hole 4a. There is a possibility that the water that has entered the housing 2 reaches the circuit board 82 through a gap formed at the boundary between the disc portion 40 and the stator housing 802. If water enters the circuit board 82, the fan motor 8 may break down. For this reason, the outdoor unit 1 has a blocking unit that blocks water from reaching the circuit board 82 through the boundary between the cover unit 4 and the fan motor 8. *

FIG. 5 is an enlarged schematic sectional view showing a part of the mounting structure of the fan motor 8 according to the first embodiment of the present invention. In the mounting structure of the present embodiment, the first blocking portion B1 is formed at the boundary between the cover portion 4 and the fan motor 8. The first blocking unit B1 is included in the blocking unit described above. The first blocking portion B1 can prevent water from entering the circuit board 82 facing the disc portion 40 from entering the water. *

The first blocking portion B1 may be provided between the cover portion 4 and the fan motor 8. Further, the first blocking portion B1 may be provided in at least one of the cover portion 4 and the fan motor 8. More specifically, the first blocking portion B1 may be provided on at least one of the cover portion 4 and the stator housing 802. The cover part 4 and the stator housing 802 can be formed of resin. For this reason, it is possible to easily form the first blocking portion B1 by resin molding. *

The position where the first blocking portion B1 is provided is not limited to the position shown in FIG. 5, and the position may be changed as appropriate. The first blocking portion B1 is preferably arranged at a position surrounding the circuit board 82. Further, it is preferable that the first blocking portion B <b> 1 is located on the radially inner side than the screw 83. It is possible to efficiently prevent the water from entering the circuit board 82 by providing a small number of positions where the first blocking portion B1 is provided. *

In addition, it is preferable that the outer diameter of the protrusion part 85 is more than the internal diameter of the hole 40a. Furthermore, it is more preferable that the outer diameter of the protrusion 85 is the same as or slightly larger than the inner diameter of the hole 40a. In this case, the stator housing 802 can be lightly press-fitted into the disc portion 40. Thereby, generation | occurrence | production of a clearance gap can be reduced in a part of boundary of the cover part 4 and the fan motor 8. FIG. By adopting this structure in addition to the first blocking portion B1, water intrusion into the circuit board 82 can be blocked more effectively. <3-1-1. First specific example of first blocking section>

FIG. 6 is a schematic diagram illustrating a first specific example of the first blocking unit B1. The first blocking portion B1 includes a seal member S that is sandwiched between the cover portion 4 and the fan motor 8 as shown in FIG. FIG. 7 is a schematic plan view showing the structure around the seal member S in the first specific example. FIG. 7 is a view seen along the axial direction. *

The seal member S is a seal ring such as an O-ring. The seal member S is disposed in the vicinity of the root of the protruding portion 85. The seal member S is sandwiched between a surface parallel to the radial direction of the stator housing 802 and a surface parallel to the radial direction of the disc portion 40. The seal member S is disposed at a position surrounding the protruding portion 85 and the circuit board 82. Note that the seal member S may be disposed at a plurality of positions. *

The seal member S is crushed and widened by tightening the screw 83. The seal member S is in close contact with the stator housing 802 and the disc portion 40. For this reason, water that enters from the outside through the boundary between the stator housing 802 and the disk portion 40 is blocked at a position where the seal member S is provided. For this reason, it is possible to prevent water from entering the circuit board 82. *

FIG. 8 is a schematic diagram showing a first modification of the first specific example. A shallow groove 802a is provided in the stator housing 802 at a position where the seal member S is disposed. According to this, the seal member S can be easily arranged at a predetermined position. The groove in which the seal member S is disposed may be provided on the cover portion 4 side instead of the stator housing 802. The groove may be provided in both the stator housing 802 and the cover portion 4. *

FIG. 9 is a schematic diagram illustrating a second modification of the first specific example. In the present modification, the seal member S is sandwiched between a surface parallel to the radial direction of the stator housing 802 and a surface parallel to the radial direction of the disc portion 40. Further, the seal member S is also sandwiched between a surface parallel to the axial direction of the stator housing 802 and a surface parallel to the axial direction of the disc portion 40. The sealing member S can prevent water from entering the circuit board 82 even in such an arrangement. At the time of work, an operator or the like can easily place the seal member S at the corner portion. <3-1-2. Second specific example of the first blocking unit>

FIG. 10 is a schematic enlarged cross-sectional view showing a second specific example of the first blocking portion B1. The first blocking portion B1 includes a recessed space RS formed in at least one of the two surfaces of the cover portion 4 and the fan motor 8 facing each other. In FIG. 10, the recessed space RS is provided only on the stator housing 802 side. The recessed space RS may be provided only on the disk portion 40 side instead of the stator housing 802. The recessed space RS may be provided in both the stator housing 802 and the disc portion 40. By providing both, space can be enlarged. *

Although the position where the recessed space RS is provided is not particularly limited, in this example, the position is in the vicinity of the root of the protruding portion 85. The recessed space RS is provided in an annular shape around the central axis A, and surrounds the projecting portion 85 and the circuit board 82 as in the seal member S of the first specific example. Water that enters from the outside through the boundary between the stator housing 802 and the disc portion 40 enters the recess space RS. The water that has entered the recessed space RS remains in the space due to surface tension. For this reason, it is possible to prevent water from entering the circuit board 82. Moreover, the disc part 40 and the stator housing 802 can be formed with resin. For this reason, the recessed space RS can be easily formed during resin molding. *

The recessed space RS may be provided at a plurality of positions. Further, the structure of the second specific example may be used in combination with the structure of the first specific example. <3-1-3. Third specific example of the first blocking unit>

FIG. 11 is a schematic enlarged cross-sectional view showing a third specific example of the first blocking portion B1. The first blocking portion B1 is a fitting in which a concave portion C formed on one of two surfaces of the cover portion 4 and the fan motor 8 facing each other and a convex portion P formed on the other are fitted Part F is included. In FIG. 11, the concave portion C is provided in the stator housing 802, and the convex portion P is provided in the disc portion 40. Instead, the concave portion C may be provided in the disc portion 40, and the convex portion P may be provided in the stator housing 802. *

Although the position where the fitting portion F is provided is not particularly limited, in this example, it is set near the root of the protruding portion 85. The fitting portion F is provided in an annular shape around the central axis A, and surrounds the protruding portion 85 and the circuit board 82 as in the seal member S of the first specific example. The fitting portion F causes a step in the water ingress route. For this reason, the water infiltration path becomes long. Water entering from the outside through the boundary between the stator housing 802 and the disk portion 40 is prevented from entering by this step and hardly reaches the circuit board 82. Moreover, the disc part 40 and the stator housing 802 can be formed with resin. For this reason, the recessed part and convex part which form the fitting part F easily can be formed in the case of resin molding. *

In addition, the fitting part F may be provided in multiple positions. The structure of the third specific example may be used in combination with the structure of the first specific example or the second specific example. The structure of the third specific example may be used in combination with the structures of the first specific example and the second specific example. <3-2. Second Embodiment>

A mounting structure of the fan motor 8 according to the second embodiment will be described. In the description, description of the same contents as those in the first embodiment described above will be omitted. A description will be given focusing on differences from the first embodiment. *

FIG. 12 is an enlarged schematic sectional view showing a part of the mounting structure of the fan motor 8 according to the second embodiment of the present invention. In the second embodiment, the fan motor 8 has a bracket 86 that is attached to the stationary part 80 and covers the circuit board 82. Specifically, the bracket 86 has a disk shape. The bracket 86 is attached to the front end surface of the protruding portion 85. Note that the position of the bracket is not limited to the tip of the protruding portion 85. The bracket 86 may be disposed inside the annular ring of the annular projecting portion 85, for example. The bracket 86 is made of, for example, metal or resin. The bracket 86 is fixed to the protruding portion 85 by, for example, screwing. The bracket 86 is put into the hole 40 a together with the protruding portion 85. By providing the bracket 86, protection of the circuit board 82 can be strengthened. *

In the first embodiment, the bracket 86 is not provided. Even in this case, the disc part 40 covers the circuit board 82 to the outside. That is, the disc part 40 plays a role of protecting the circuit board 82. The configuration of the first embodiment has an advantage that the number of parts can be reduced. *

In the second embodiment, the outdoor unit 1 includes a second blocking unit B2 included in the blocking unit described above. The second blocking portion B <b> 2 is formed at the boundary between the stationary portion 80 and the bracket 86. More specifically, the second blocking portion B <b> 2 is formed at the boundary between the stator housing 802 and the bracket 86. The second blocking part B2 can prevent water from entering the circuit board 82 by preventing water from entering. *

The second blocking portion B2 may be provided between the stationary portion 80 and the bracket 86. The second blocking portion B2 may be provided on at least one of the stationary portion 80 and the bracket 86. More specifically, the second blocking portion B2 may be provided on at least one of the bracket 86 and the stator housing 802. The stator housing 802 can be formed of resin. For this reason, it is also possible to easily form the second blocking portion B2 by resin molding. *

Specific examples of the second blocking portion B2 include the seal member S, the recessed space RS, and the fitting portion F, which are the same as the first to third specific examples of the first embodiment. In the configuration of the second embodiment, the first blocking portion B1 may be provided. <4. Other>

The configurations of the embodiment and the modification described above are merely examples of the present invention. The configuration of the embodiment and the modification may be changed as appropriate without departing from the technical idea of the present invention. In addition, a plurality of embodiments and modifications may be implemented in combination within a possible range.

For example, in the configuration of the first embodiment in which the first blocking portion B1 is provided, a bracket 86 similar to that of the second embodiment may be incorporated in the fan motor 8.

The present invention can be suitably used for an air conditioner, for example.

DESCRIPTION OF SYMBOLS 1 ... Outdoor unit, 2 ... Housing, 2a ... Side wall, 3 ... Opening, 4 ... Cover part, 4a ... Vent hole, 5 ... Power supply part, 6 ... Compressor, 7 ... heat exchanger, 8 ... fan motor, 8a ... vane, 9 ... bottom plate, 10 ... support part, 40 ... disc part, 40a ... Hole part, 40b ... Screw hole, 41 ... First rib, 42 ... Second rib, 80 ... Stationary part, 81 ... Rotating part, 82 ... Circuit board, 83 ... Screw, 84 ... Mounting part, 85 ... Projection part, 86 ... Bracket, 801 ... Stator, 801a ... Stator core, 801b ... Conductor, 801c ... Insulator, 802 ... Stator housing, 802a ... Groove, 803 ... Bearing, 811 ... Shaft, 812 ... Rotor, 812a ..Cylindrical part, 813 ... Magnet, A ... Center axis, B1 ... First blocking part, B2 ... Second blocking part, C ... Convex part, F ... Fitting Joint part, P ... convex part, RS ... concave part space

Claims

An air conditioner outdoor unit,
A housing having an opening;
A cover portion having a ventilation hole and covering the opening;
A fan motor attached to the cover part;
A circuit board mounted on the fan motor;
A blocking unit for blocking water from reaching the circuit board through a boundary between the cover unit and the fan motor;
Outdoor unit having.
The cover part and the fan motor are attached in contact with each other,
The outdoor unit according to claim 1, wherein the blocking unit includes a first blocking unit formed at a boundary between the cover unit and the fan motor.
The outdoor unit according to claim 2, wherein the first blocking unit includes a seal member sandwiched between the cover unit and the fan motor.
The outdoor unit according to claim 2 or 3, wherein the first blocking portion includes a recessed space formed in at least one of two surfaces of the cover portion and the fan motor facing each other.
The first blocking portion has a fitting portion in which a concave portion formed on one of two faces of the cover portion and the fan motor facing each other and a convex portion formed on the other are fitted. The outdoor unit according to any one of claims 2 to 4, which is included.
The fan motor is
A stationary part having a stator;
A bracket attached to the stationary part and covering the circuit board;
Have
The outdoor unit according to any one of claims 1 to 5, wherein the blocking unit includes a second blocking unit formed at a boundary between the stationary unit and the bracket.
The outdoor unit according to any one of claims 1 to 6, wherein the blocking unit is disposed at a position surrounding the circuit board.
The fan motor is fixed to the cover portion using screws arranged in parallel with the axial direction,
The outdoor unit according to any one of claims 1 to 7, wherein the blocking unit is located radially inward of the screw.
The fan motor is
A mounting portion for attaching the screw;
A protruding portion protruding in the axial direction with respect to the mounting portion;
Have
The cover part has a hole part for inserting the protruding part,
The outdoor unit according to claim 8, wherein an outer diameter of the protruding portion is equal to or larger than an inner diameter of the hole portion.
The fan motor is
A stationary portion having the stator,
The stator is
A magnetic stator core having a plurality of teeth;
A conductive wire wound around the plurality of teeth;
Have
The stationary portion further includes a resin stator housing that covers at least a part of the stator core and the conducting wire,
The outdoor unit according to claim 1, wherein the blocking portion is provided in at least one of the stator housing and the cover portion.