WO2020110165A1

WO2020110165A1 - Outdoor unit for air conditioner

Info

Publication number: WO2020110165A1
Application number: PCT/JP2018/043351
Authority: WO
Inventors: 賢太郎米原; 達也浅沼; 隼人栗野
Original assignee: 三菱電機株式会社
Priority date: 2018-11-26
Filing date: 2018-11-26
Publication date: 2020-06-04
Also published as: JPWO2020110165A1; JP7012874B2

Abstract

An outdoor unit for an air conditioner comprising a housing that configures the outline of the outdoor unit, a fan that is disposed inside the housing and that creates a flow of air passing through the inside of the housing, a partition plate that is provided inside the housing and that divides the space inside the housing into a fan chamber accommodating a heat exchanger and the fan and a machine chamber accommodating a compressor, and an electrical component box that accommodates a control board to control the outdoor unit and that is mounted to the partition plate, wherein the electrical component box has a heat sink that is thermally connected to a heat generating element mounted to the control board and that disperses the heat generated from the heat generating element by projecting to the inside of the fan chamber, and an air guide that forms an air passage that guides air drawn into the housing by the fan to the heat sink.

Description

Air conditioner outdoor unit

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

Conventionally, an outdoor unit equipped with a control board is known as an outdoor unit for an air conditioner. Some of the outdoor units include a heat sink arranged in contact with the heating element to cool the heating element mounted on the control board. Then, an outdoor unit of an air conditioner has been proposed in which the heat sink is arranged so as to project into the blower chamber for heat exchange between the heat sink and the air (see, for example, Patent Document 1).

JP, 2013-133948, A

In recent years, with the sophistication of control content, it has become necessary to further improve the cooling efficiency of the heating elements mounted on the control board in the outdoor unit of the air conditioner. Further, in the outdoor unit of the conventional air conditioner, in order to improve the cooling efficiency of the heating element, the surface area of the heat sink is increased by enlarging the heat sink, and the cooling efficiency of the heating element is increased by increasing the area where the heat sink contacts the air. Is raised. However, in the outdoor unit of the air conditioner, the size of the heat sink is limited due to the space of the blower room, and it is necessary to increase the cooling efficiency of the heating element without increasing the size of the heat sink.

The present invention is to solve the above problems, and to provide an outdoor unit of an air conditioner that enhances cooling efficiency of a heating element without increasing the size of the heat sink in the outdoor unit including the heat sink. ..

An outdoor unit for an air conditioner of the present invention includes a housing that forms an outer shell of the outdoor unit, a blower that is arranged inside the housing and forms a flow of air passing through the housing, and is provided inside the housing. The partition plate that separates the space inside the housing into the fan room that houses the heat exchanger and the blower, and the machine room that houses the compressor, and the control board that controls the outdoor unit are installed and attached to the partition board. The electrical component box, which is thermally connected to the heating element mounted on the control board and projects into the blower chamber to dissipate the heat generated from the heating element, and the electrical component box inside the housing. And an air guide that forms an air passage that guides the air sucked into the heat sink.

The outdoor unit of the air conditioner of the present invention has an air guide that forms an air passage that guides the air sucked into the housing by the blower to the heat sink. The outdoor unit of the air conditioner can guide the air drawn into the housing by the blower to the heat sink by forming the air passage using the air guide, so that the heat dissipation efficiency of the heat sink can be improved without increasing the size of the heat sink. Can be raised. As a result, the outdoor unit of the air conditioner can improve the cooling efficiency of the heating element without increasing the size of the heat sink.

It is a perspective view of the outdoor unit which concerns on embodiment of this invention. It is a disassembled perspective view which decomposed|disassembled a part of outdoor unit which concerns on embodiment of this invention. It is a disassembled front view which decomposed|disassembled a part of outdoor unit which concerns on embodiment of this invention. It is a perspective view which shows the partition plate of the outdoor unit which concerns on embodiment of this invention. It is the perspective view which decomposed|disassembled the electric component box of the outdoor unit which concerns on embodiment of this invention. It is a perspective view of the heat sink support of the outdoor unit which concerns on embodiment of this invention. It is the perspective view which looked at the air guide of the outdoor unit concerning the embodiment of the invention from the upper part. It is the perspective view which looked at the air guide of the outdoor unit concerning the embodiment of the invention from the lower side. FIG. 3 is an enlarged front view of the outdoor unit according to the embodiment of the present invention in which the electrical component box and the partition plate are assembled. It is a perspective view which shows the state which attached the air guide of the outdoor unit which concerns on embodiment of this invention to the heat sink support. It is a perspective view which shows the state which attached the electrical component box of the outdoor unit which concerns on embodiment of this invention to the partition plate.

Hereinafter, the outdoor unit 100 for an air conditioner according to the present invention will be described in detail with reference to the drawings. In the following drawings, the size relationship of each component may differ from the actual one. In addition, in the following drawings, the components denoted by the same reference numerals are the same or equivalent, and this is common to all the texts of the specification. Furthermore, the forms of the constituent elements shown in the entire text of the specification are merely examples, and the present invention is not limited to these descriptions. In addition, terms (eg, “upper”, “lower”, “right”, “left”, “front”, “rear”, etc.) are appropriately used to facilitate understanding. However, these notations are merely described as such for convenience of description, and do not limit the arrangement and orientation of the device or parts.

Embodiment.
[Outdoor unit 100]
FIG. 1 is a perspective view of an outdoor unit 100 according to the embodiment of the present invention. The outline of the outdoor unit 100 of the air conditioner will be described with reference to FIG. 1. The X axis shown in the following drawings including FIG. 1 shows the left-right direction of the outdoor unit 100, the Y axis shows the front-back direction of the outdoor unit 100, and the Z axis shows the vertical direction of the outdoor unit 100. More specifically, when the outdoor unit 100 is viewed from the front, the X1 side is the left side, the X2 side is the right side, the Y1 side is the front side on the Y axis, the Y2 side is the rear side, the Z1 side is the upper side, and the Z2 side is the lower side on the Z axis. The outdoor unit 100 will be described as the side. When the outdoor unit 100 is viewed from the front, the outdoor unit 100 is viewed from the downstream side where the air is blown from the housing 50 in the flow direction of the air flowing in the housing 50. In addition, the positional relationship (for example, the vertical relationship) between the constituent members in the specification is, in principle, when the outdoor unit 100 is installed in a usable state.

(Case 50)
As shown in FIG. 1, the outdoor unit 100 has a housing 50 configured in a substantially rectangular parallelepiped shape. The housing 50 of the outdoor unit 100 is made of sheet metal and constitutes the outer shell of the outdoor unit 100. The housing 50 of the outdoor unit 100 has a front panel 1, a rear panel 2, a top panel 3 and a base 4. The housing 50 is formed in a box shape by the front panel 1, the back panel 2, the top panel 3, and the base 4.

The front panel 1 has a horizontally long first side surface portion 1a and a vertically long second side surface portion 1b, and has an L shape when viewed from above the outdoor unit 100, that is, from the top surface panel 3 side. It is a sheet metal panel that is bent into. The first side surface portion 1a constitutes a side wall of the housing 50 on the side where the air of the outdoor unit 100 is blown out, and the second side surface portion 1b extends along the main flow direction of air in the outdoor unit 100. It constitutes the side wall of the housing 50. A circular outlet 1c is formed on the first side surface 1a of the front panel 1. A rectangular fan guard 6 is attached to the first side surface portion 1a of the front panel 1 to cover the outlet 1c and protect the propeller fan of the blower 5. Further, the second side surface portion 1b may be formed with a plurality of slits for taking the outdoor air into the outdoor unit 100 (not shown). Since the second side surface portion 1b is not shown in the perspective view of FIG. 1, the position of the side surface corresponding to the second side surface portion 1b is indicated with a reference numeral and a leader line with an arrow. Further, the front panel 1 may be composed of two sheet metal panels with the first side surface portion 1a and the second side surface portion 1b as separate bodies.

The back panel 2 is a sheet metal panel that is bent so as to have an L shape when viewed from the top panel 3 side. The back panel 2 has a vertically long third side surface portion 2a facing the second side surface portion 1b and a fourth side surface portion 2b facing a part of the first side surface portion 1a. A plurality of openings for drawing in the plug and the refrigerant pipe connected to the external power source are formed in the third side surface portion 2a (not shown). Further, a service cover 2d is attached to the third side surface portion 2a to cover a plurality of openings provided in the third side surface portion 2a and prevent dust or water from entering. Since the fourth side surface portion 2b cannot be illustrated in the perspective view of FIG. 1, the position of the side surface corresponding to the fourth side surface portion 2b is shown with a reference numeral and a leader line with an arrow. Further, the back panel 2 may be composed of two sheet metal panels with the third side surface portion 2a and the fourth side surface portion 2b as separate bodies.

The top panel 3 is a sheet metal panel that constitutes the top plate of the housing 50 and covers the upper part of the outdoor unit 100. The top panel 3 is attached to the upper edges of the front panel 1 and the rear panel 2.

The base 4 faces the top panel 3 in the housing 50 and forms a bottom plate of the housing 50. A front panel 1 and a rear panel 2 are attached to the base 4, and a plurality of legs 4a are provided on the lower surface of the base 4. The legs 4a serve as a base for fixing the outdoor unit 100 to the installation location. Since the base 4 is not shown in the perspective view of FIG. 1, the position of the panel corresponding to the base 4 is indicated by a lead line with an arrow together with a reference numeral.

(Internal structure of the outdoor unit 100)
FIG. 2 is an exploded perspective view in which a part of the outdoor unit 100 according to the embodiment of the present invention is disassembled. FIG. 3 is an exploded front view in which a part of the outdoor unit 100 according to the embodiment of the present invention is disassembled. Next, the internal configuration of the outdoor unit 100 of the air conditioner will be described with reference to FIGS. 2 and 3. In order to explain the internal configuration of the outdoor unit 100 of the air conditioner in an easy-to-understand manner, in FIGS. 2 and 3, for example, a part of the outdoor unit 100 such as the front panel 1, the rear panel 2, and the top panel 3 is illustrated. Illustration of components is omitted. The outdoor unit 100 includes a partition plate 7, a heat exchanger 10, a blower 5, a compressor 11, an electrical component box 13, and a motor support member 22 inside a housing 50.

FIG. 4 is a perspective view showing the partition plate 7 of the outdoor unit 100 according to the embodiment of the present invention. The partition plate 7 will be described with reference to FIGS. 2 to 4. The partition plate 7 is a partition wall that is provided inside the housing 50 and separates a space inside the housing 50 of the outdoor unit 100 into a blower room 8 and a machine room 9. The partition plate 7 is a plate-shaped member provided inside the housing 50, and is formed by bending a sheet metal or the like, for example. The partition plate 7 is arranged on the base 4 in the housing 50, is provided so as to extend in the upward direction (Z-axis direction) from the base 4, and extends in the front-back direction (Y-axis direction) of the base 4. It is provided in. The partition plate 7 has a partition wall portion 7d provided so as to extend between the first side surface portion 1a of the front panel 1 and the fourth side surface portion 2b of the rear panel 2. An upper edge portion 7d1 of the partition wall portion 7d has a mounting plate portion 7e that is bent so as to extend toward the blower chamber 8 side. The electrical component box 13 is mounted on the mounting plate portion 7e.

Returning to FIG. 2 and FIG. 3, the blower room 8 is a space surrounded by the front panel 1, the top panel 3, the base 4, the heat exchanger 10, and the partition plate 7. The blower chamber 8 takes in outdoor air from the outside of the outdoor unit 100 through a plurality of slits provided in the heat exchanger 10 or the second side surface portion 1b of the front panel 1 and blows the air inside the outdoor unit 100. It is configured to be discharged to the outside of the outdoor unit 100 via the outlet 1c. The machine room 9 is a space surrounded by the first side surface portion 1 a of the front panel 1, the back panel 2, the top panel 3, the base 4, and the partition plate 7, and dust or water from the outside of the outdoor unit 100. It has a structure that can prevent the intrusion of.

The space on the side of the fan room 8 in the housing 50 accommodates the heat exchanger 10 and the fan 5 arranged so as to face the heat exchanger 10, and the side of the machine room 9 in the housing 50. A compressor 11 is housed in the space. The heat exchanger 10 and the compressor 11 are installed on the base 4. Further, the electrical component box 13 is arranged on the mounting plate portion 7e formed on the upper edge portion 7d1 of the partition plate 7. The electrical component box 13 is arranged above the compressor 11 and across the blower chamber 8 and the machine chamber 9. Note that the electrical component box 13 is not limited to one that is arranged across the blower room 8 and the machine room 9, and for example, the main part may be arranged only in the machine room 9.

The heat exchanger 10 exchanges heat between the refrigerant flowing inside and the outside air, and functions as an evaporator during heating operation and as a condenser during cooling operation. The heat exchanger 10 can be configured as, for example, a fin-and-tube heat exchanger, and is used to increase the heat transfer area between the plurality of heat transfer tubes 10a that pass the refrigerant and the refrigerant flowing through the heat transfer tubes 10a and the outside air. It is provided with a plurality of fins 10b. The heat exchanger 10 has a flat plate area and a curved surface area, and is formed in an L shape when viewed in a direction perpendicular to the base 4. 2 and 3 illustrate the case where the heat exchanger 10 is formed in an L shape, the heat exchanger 10 has a linear shape when viewed in a direction perpendicular to the base 4. It may be formed in a U shape, or may be formed in a U shape having curved surface regions at both ends.

The blower 5 is arranged inside the housing 50 and forms a flow of air passing through the inside of the housing 50. As shown in FIG. 2, the blower 5 is a blower including a motor 5a and a propeller fan 5b, and generates air circulation for efficiently performing heat exchange in the heat exchanger 10. As shown in FIGS. 2 and 3, the blower 5 is arranged in front of the heat exchanger 10 (on the Y1 side) in the housing 50. In the blower 5, the motor 5a is attached and fixed to the motor support member 22. The blower 5 makes a negative pressure between the heat exchanger 10 and the propeller fan 5b, introduces outside air into the housing 50 from the back side (Y2 side) of the housing 50, and introduces the outside air into the outdoor unit 100. The outside air thus discharged is discharged from the front side (Y1 side) of the outdoor unit 100 toward the outside of the housing 50.

The compressor 11 compresses the sucked refrigerant, discharges it into a high-temperature and high-pressure gas refrigerant state. The compressor 11 is, for example, a rotary type, scroll type, or vane type compressor. The compressor 11 may include an inverter device, and the inverter device may be configured to change the operating frequency to change the capacity of the compressor 11. In the machine room 9, a refrigerant pipe 12 that connects the constituent elements of the refrigeration cycle circuit is arranged.

[Electrical product box 13]
FIG. 5 is an exploded perspective view of the electrical component box 13 of the outdoor unit 100 according to the embodiment of the present invention. The electrical component box 13 will be described with reference to FIGS. 2, 3, and 5. As shown in FIGS. 2 and 3, the outdoor unit 100 has an electric component box 13 in a housing 50. The electrical component box 13 is attached to the partition plate 7. The electrical component box 13 stores electrical components such as control components for controlling the operation of the outdoor unit 100. The control component includes, for example, hardware such as a circuit device, a memory that stores software and a central processing unit that executes software, or a combination thereof. In the outdoor unit 100, the control board 14 that controls the outdoor unit 100 is housed in the electrical component box 13. Further, the electrical component box 13 has a heat sink 15 for cooling the electrical components and the like stored in the electrical component box 13. When the control board 14 is driven, electronic components such as transistors and diodes generate heat, and the temperature of the control board 14 rises. In order to dissipate heat from the control board 14 and cool the control board 14, a heat sink 15 that is thermally connected to the control board 14 is arranged so as to project from the electrical component box 13 into the blower chamber 8. The air flowing in the blower chamber 8 hits the heat sink 15 protruding from the electric component box 13 into the blower chamber 8, and the heat of the control board 14 is dissipated via the heat sink 15. The electrical component box 13 further includes an air guide 30 that guides the air drawn into the housing 50 by the blower 5 to the heat sink 15.

(Control board 14)
The control board 14 is a board on which a plurality of electronic components are mounted. Electronic components such as capacitors and resistors are attached to the control board 14 by soldering. Further, a heat generating element 14a such as a transistor or a diode for controlling the operations of the compressor 11 and the blower 5 is mounted on the control board 14. In FIG. 5, since the heating element 14a is arranged between the plate surface of the control board 14 and the heat sink 15, the position of the heating element 14a is indicated by an arrow. The heating element 14a such as a transistor or a diode generates heat while the control board 14 is driven. The control board 14 is provided with an inverter circuit that controls the frequency of an alternating current that drives the compressor 11 and the motor 5 a of the blower 5. The inverter circuit is an electronic circuit that generates a frequency-controlled alternating current from a direct current. Further, the control board 14 can be provided with a converter circuit for converting an alternating current flowing from an external power source through a terminal block (not shown) into a direct current. The converter circuit may be integrally mounted on the same control board 14 as the inverter circuit, or may be mounted on a control board 14 different from the board on which the inverter circuit is mounted. When the mounting side of the electronic components is assumed to be the front surface side of the control board 14, the electrical component box 13 has a substrate holder 16 and an electrical component box cover 20 on the back surface side of the control substrate 14.

(Substrate holder 16)
The control board 14 is housed in a board holder 16 made of resin such as ABS. In other words, the substrate holder 16 is attached to the control substrate 14 and supports the peripheral portion and the back surface portion of the control substrate 14. The control board 14 is protected by the board holder 16 from, for example, an external impact. The substrate holder 16 is formed in a rectangular frame shape by the frame side wall portions 16a forming the four sides. Inside the frame side wall portion 16 a of the substrate holder 16, a lattice-shaped frame 16 b that supports the back surface portion of the control substrate 14 is formed. Further, the terminal block support 21 can be attached to the substrate holder 16. As shown in FIG. 5, the surface portion of the control board 14 to which the electronic component is attached corresponds to the lower surface portion (Z2 side) of the control board 14. Further, as shown in FIG. 5, the back surface of the control board 14 to which the electronic components are soldered corresponds to the top surface (Z1 side) of the control board 14.

(Electrical product box cover 20)
An electrical component box cover 20 made of sheet metal is provided above the electrical component box 13. The electrical component box cover 20 is fitted in the substrate holder 16 and covers the entire lattice-shaped frame 16 b of the substrate holder 16. The electrical component box cover 20 protects the back surface of the control board 14 from intrusion of water or dust. The electric component box cover 20 prevents the control board 14 from getting wet and electrically short-circuited due to dew or the like, and even if a flame is generated in the control board 14 due to a short-circuit or the like, the flame is transferred from the control board 14 to the outside. Prevent that.

(Heat sink 15)
The electrical component box 13 has a heat sink 15 on the surface side of the control board 14. More specifically, the heat sink 15 is attached to a part of the heat-generating electronic component arranged on the surface of the control board 14. The electronic component having heat generating property is, for example, the heat generating element 14a such as a transistor. The heat sink 15 is thermally connected to the heat generating element 14a mounted on the control board 14, protrudes into the blower chamber 8, and dissipates the heat generated from the heat generating element 14a.

The heat sink 15 has a plate-shaped portion 15a that covers the heating element 14a, and a plurality of fins 15b that are provided so as to extend from the plate-shaped portion 15a in a direction away from the control board 14. Each of the fins 15b is formed in a plate shape, and its peripheral edge portion faces the first side surface portion 1a, the fourth side surface portion 2b, and the base 4. The plurality of fins 15b are arranged in parallel in the direction between the second side surface portion 1b and the third side surface portion 2a. With this configuration, in the blower chamber 8, the air blown out from the outlet 1c through the heat exchanger 10 flows along the surfaces of the fins 15b and between the fins 15b. By providing the heat sink 15 with the plurality of fins 15b, the heat transfer area to and from the air can be increased, so that the heat generated in the electronic component can be efficiently dissipated. Further, by disposing the heat sink 15 in the blower chamber 8 of the outdoor unit 100, heat can be efficiently dissipated in the air sent from the blower 5.

As shown in FIG. 5, the electrical component box 13 includes a heat sink support 17, a heat sink holder 19, and an air guide 30 on the surface side of the control board 14.

(Heat sink support 17)
FIG. 6 is a perspective view of the heat sink support 17 of the outdoor unit 100 according to the embodiment of the present invention. The heat sink support 17 will be described with reference to FIGS. 5 and 6. The heat sink support 17 supports the electric component box 13 and fixes it to the partition plate 7 when the electric component box 13 is arranged on the partition plate 7. The heat sink support 17 is made of sheet metal and is fixed to the substrate holder 16. The heat sink support 17 includes a frame body portion 17a fixed to the substrate holder 16, a side wall portion 17b extending from the frame body portion 17a to the side opposite to the arrangement side of the control board 14, and a frame body portion 17a in the extending direction of the side wall portion 17b. And a mounting portion 17f formed on the opposite side. That is, in the vertical direction of the outdoor unit 100, the frame body portion 17a is formed on the upper end portion 17b1 of the side wall portion 17b, and the mounting portion 17f is formed on the lower end portion 17b2 of the side wall portion 17b. The frame body portion 17a and the mounting portion 17f are formed on the front surface side and the back surface side of the side wall portion 17b. The frame body portion 17a and the attachment portion 17f are each formed substantially perpendicular to the side wall portion 17b, and are formed so as to extend to the opposite side via the side wall portion 17b.

The frame portion 17a is attached and fixed to the substrate holder 16 to which the control substrate 14 is attached. Then, the heat sink 15 is fitted and fixed to the frame body portion 17a so as to project. More specifically, the frame body portion 17a covers and supports the plate-shaped portion 15a of the heat sink 15 and the heat sink holder 19 while being attached to the substrate holder 16. The frame body portion 17a of the heat sink support 17 is formed in a hollow rectangular frame body shape, and an opening 17c is formed inside the wall portion formed in the frame body shape. The fin portion 15b of the heat sink 15 is fitted and fixed in the opening portion 17c of the frame body portion 17a of the heat sink support 17, thereby exposing the fin portion 15b of the heat sink 15 through the opening portion 17c. The fins 15b of the heat sink 15 exposed through the openings 17c of the heat sink support 17 allow the wind flowing in the blower chamber 8 to contact the fins 15b, and the heat is dissipated from the control board 14 via the fins 15b to cool the control board 14. To be done.

The frame body portion 17a has a lower wall portion 17a1 arranged in parallel with the electrical component box cover 20 and the frame 16b of the substrate holder 16. The lower wall portion 17a1 is provided on the opposite side of the side wall portion 17b through the opening 17c. That is, the lower wall portion 17a1 is formed at the tip end of the frame body portion 17a formed so as to rise from the side wall portion 17b. The lower wall portion 17a1 covers and supports the plate-shaped portion 15a of the heat sink 15 and the heat sink holder 19 from the lower side in a state where the frame body portion 17a is attached to the substrate holder 16. In other words, the plate-shaped portion 15a of the heat sink 15 and the heat sink holder 19 are arranged between the frame 16b of the substrate holder 16 and the lower wall portion 17a1 with the frame body portion 17a attached to the substrate holder 16. To be done.

When the air guide 30 is attached to the heat sink support 17, the lower wall portion 17a1 is formed with a lower wall hole portion 17a2 which communicates with an upper fixing hole 35a formed in the air guide 30 which will be described later. A fixing member 34 such as a screw for fixing the air guide 30 to the heat sink support 17 is inserted into the lower wall hole portion 17a2 and the upper fixing hole 35a. Further, the lower wall portion 17a1 is formed with a boss hole portion 17a3 into which the boss portion 35b formed in the air guide 30 is inserted when the air guide 30 is attached to the heat sink support 17. The boss hole portion 17a3 is a concave portion formed on the lower wall portion 17a1 of the frame body portion 17a.

The side wall portion 17b is formed so as to extend from the frame body portion 17a to the side opposite to the side where the control board 14 is arranged, and faces the heat sink 15. That is, the side wall portion 17b is provided so as to extend from the frame portion 17a in the same direction as the protruding direction of the fin 15b of the heat sink 15. The side wall portion 17b is a plate-shaped side wall. The side wall portion 17b is formed so as to extend downward (Z2 direction) from one side of the rectangular frame body portion 17a. The lower end 17b2 of the side wall 17b is attached to the upper part of the partition plate 7, and the side wall 17b functions as a wall that separates the machine room 9 and the blower room 8. The heat sink support 17 has a frame body portion 17 a and a side wall portion 17 b having an inverted L-shaped appearance when viewed from the first side surface portion 1 a side of the front panel 1. Further, the heat sink support 17 is arranged so that the side wall portion 17b and the mounting portion 17f form an L shape when viewed from the first side surface portion 1a side of the front panel 1.

The attachment portion 17f is formed on the lower end portion 17b2 on the side opposite to the frame body portion 17a in the extending direction of the side wall portion 17b. Further, the mounting portion 17f is formed at the lower end portion 17b2 so as to extend in a direction opposite to the direction in which the frame body portion 17a rises with respect to the side wall portion 17b. The attachment portion 17f is a plate-shaped member provided on the lower end portion 17b2 of the side wall portion 17b. Ventilation holes 17f1 for discharging the heat generated in the machine room 9 to the blower room 8 are formed in the mounting portion 17f. The ventilation hole 17f1 is a through hole formed in the mounting portion 17f. Further, the mounting portion 17f is provided with a mounting hole 17f2 which communicates with the lower fixing hole 36c formed in the air guide 30 when the air guide 30 is mounted on the heat sink support 17. A fixing tool 34 such as a screw for fixing the air guide 30 to the heat sink support 17 is inserted into the mounting hole 17f2 and the lower fixing hole 36c.

The mounting portion 17f is also provided with a storage portion 17g. The storage portion 17g is a portion formed in a concave shape, and the wall portion that constitutes the mounting portion 17f is a portion that is recessed toward the arrangement side of the control board 14. When the air guide 30 is attached to the heat sink support 17, a fixed portion 36e of the air guide 30 described later is stored in the storage portion 17g, and the storage portion 17g engages with the fixed portion 36e.

The heat sink support 17 further has a vertical wall portion 17d extending in the vertical direction (Z-axis direction) when the electrical component box 13 is arranged on the partition plate 7. The vertical wall portion 17d is a columnar portion provided on the side portion on the front side (Y1 side) of the heat sink support 17. The vertical wall portion 17d has a substantially L-shaped horizontal cross section, and is formed on the partition wall portion 7d at the lower end portion of the mounting surface portion 17d1 formed in parallel with the virtual extension surface of the side wall portion 17b. A fixing screw hole 17e communicating with a screw hole (not shown) is formed. The heat sink support 17 is integrally formed with a frame body portion 17a, a side wall portion 17b, a mounting portion 17f, and a vertical wall portion 17d. The heat sink support 17 may be formed separately as long as the frame body portion 17a, the side wall portion 17b, the mounting portion 17f, and the vertical wall portion 17d are fixed.

(Heat sink holder 19)
The heat sink holder 19 is made of an insulating resin such as ABS, and is arranged between the heat sink 15 and the heat sink support 17 in order to electrically insulate the heat sink 15 and the heat sink support 17. Since the heat sink support 17 is made of metal and conducts electricity, the heat sink 15 and the heat sink support 17 may be electrically connected. Therefore, the heat sink holder 19 ensures electrical insulation between the heat sink 15 and the heat sink support 17. The heat sink holder 19 is provided with a rectangular slit for penetrating the fin 15b, and is configured not to interfere with heat dissipation in the fin 15b.

(Air guide 30)
FIG. 7 is a perspective view of the air guide 30 of the outdoor unit 100 according to the embodiment of the present invention as viewed from above. FIG. 8 is a perspective view of the air guide 30 of the outdoor unit 100 according to the embodiment of the present invention as viewed from below. The air guide 30 will be described with reference to FIGS. 7 and 8. The air guide 30 forms an air passage that guides the air sucked into the housing 50 by the blower 5 to the heat sink 15. The air guide 30 is made of resin, for example. The air guide 30 is attached to the heat sink support 17, and allows the air flowing in the blower chamber 8 to efficiently contact the heat sink 15. In this embodiment, the air guide 30 is made of resin, but the air guide 30 does not have to be resin. The air guide 30 is formed so as to extend in the flow direction of the air passing through the inside of the housing 50. That is, the air guide 30 is formed so as to extend in the front-rear direction (Y-axis direction) of the housing 50.

The air guide 30 has a bottom plate portion 31, a vertical plate portion 32, and a bent portion 33. In the air guide 30, a vertical cross section of the bottom plate portion 31, the vertical plate portion 32, and the bent portion 33 in the left-right direction (X-axis direction) of the outdoor unit 100 is formed in a substantially L shape. The front edge portion 30a of the air guide 30 including the bottom plate portion 31, the vertical plate portion 32, and the bent portion 33 faces the heat exchanger 10 when the electrical component box 13 is arranged on the upper part of the partition plate 7. It is the side edge. In addition, the rear edge portion 30b of the air guide 30 configured by the bottom plate portion 31, the vertical plate portion 32, and the bent portion 33 is the first edge of the housing 50 when the electrical component box 13 is arranged above the partition plate 7. 1 is an edge portion on the side facing the side surface portion 1a. In the air flow in the blower chamber 8 formed by the blower 5, the front edge portion 30a is arranged upstream of the air flow with respect to the rear edge portion 30b. The front edge portion 30a and the rear edge portion 30b are each formed in a substantially L shape when the outdoor unit 100 is viewed from the front. In the air guide 30, the length of the front edge portion 30a is larger than the length of the rear edge portion 30b.

The bottom plate portion 31 is a wall portion of the air guide 30 that faces the base 4 when the electrical component box 13 is arranged above the partition plate 7. The bottom plate portion 31 is formed in the housing 50 of the outdoor unit 100 so as to extend in the front-rear direction (Y-axis direction) of the outdoor unit 100 from the rear edge portion 30b of the air guide 30 to the front edge portion 30a of the air guide 30. It is a plate material. The bottom plate portion 31 forms an inclined surface that is inclined downward with respect to the horizontal plane from the rear edge portion 30b to the front edge portion 30a. In the bottom plate portion 31, the slope formed from the rear edge portion 30b to the front edge portion 30a forms a curved surface. Therefore, the vertical cross section between the rear edge portion 30b and the front edge portion 30a of the bottom plate portion 31 is formed in an arc shape. The bottom plate portion 31 is formed such that the cross section is continuous in the left-right direction (X-axis direction) of the outdoor unit 100. The rear edge portion 30b and the front edge portion 30a of the bottom plate portion 31 are formed in a linear shape extending in a substantially horizontal direction. The bottom plate portion 31 is arranged between the heat sink 15 and the base 4 as shown in FIG. 3 when the electric component box 13 is arranged above the partition plate 7. The bottom plate portion 31 covers at least a portion of the lower portion of the heat sink 15, that is, at least a portion of the edge portion of the heat sink 15 on the base 4 side.

The vertical plate portion 32 extends from the rear edge portion 30b of the air guide 30 to the front edge portion 30a of the air guide 30 in the housing 50 of the outdoor unit 100 when the electrical component box 13 is arranged above the partition plate 7. The plate member is formed so as to extend in the front-rear direction (Y-axis direction) of the outdoor unit 100. The front edge portion 30a of the vertical plate portion 32 is formed to be substantially perpendicular to the front edge portion 30a of the bottom plate portion 31. Further, the rear edge portion 30b of the vertical plate portion 32 is formed so as to be substantially perpendicular to the rear edge portion 30b of the bottom plate portion 31. The vertical plate portion 32 forms an inclined surface that is inclined laterally with respect to the vertical surface from the rear edge portion 30b to the front edge portion 30a. The vertical plane here is a plane perpendicular to the horizontal plane and extends in the front-rear direction of the outdoor unit 100. The inclined surface of the vertical plate portion 32 formed from the rear edge portion 30b to the front edge portion 30a forms a curved surface. Therefore, the horizontal cross section between the rear edge portion 30b and the front edge portion 30a of the vertical plate portion 32 is formed in an arc shape. The vertical plate portion 32 is formed such that the cross section is continuous in the vertical direction (Y-axis direction) of the outdoor unit 100. The vertical plate portion 32 is formed such that the wall gradually separates from the bottom plate portion 31 from the rear edge portion 30b to the front edge portion 30a in a plan view in a direction perpendicular to the base 4. Further, the vertical plate portion 32 is formed such that, in a plan view in a direction perpendicular to the base 4, a wall gradually extends away from an engagement side wall portion 36d described below from the rear edge portion 30b to the front edge portion 30a. The rear edge portion 30b and the front edge portion 30a of the vertical plate portion 32 are formed in a linear shape extending in the vertical direction (Z-axis direction). When the electrical component box 13 is arranged on the upper part of the partition plate 7, the vertical plate portion 32 is, as shown in FIG. 3, a fin 15b arranged on the most opposite side of the machine room 9 among the plurality of fins 15b. Is arranged so as to face at least a part of the plate surface of. That is, the vertical plate portion 32 covers at least a part of the side of the heat sink 15 on the side opposite to the machine room 9 when the electrical component box 13 is arranged above the partition plate 7. In addition, a part is, for example, a part on the upstream side of the heat sink 15 in the flow direction of air passing through the heat sink 15.

When the electric component box 13 is arranged on the upper part of the partition plate 7, the bent portion 33 is located in the housing 50 of the outdoor unit 100 from the rear edge portion 30b of the air guide 30 to the front edge portion 30a of the air guide 30 outside the room. The plate member is formed so as to extend in the front-rear direction (Y-axis direction) of the machine 100. The bent portion 33 is formed between the bottom plate portion 31 and the vertical plate portion 32. The bent portion 33 is integrally formed with one side edge portion 31 a of the bottom plate portion 31 and a lower edge portion 32 a of the vertical plate portion 32. The bent portion 33 is formed in an arc shape that is convex on the outside of the air guide 30 in a vertical cross section of the outdoor unit 100 in the left-right direction (X-axis direction). Therefore, the bent portion 33 forms a curved surface between the bottom plate portion 31 and the vertical plate portion 32. The rear edge portion 30b and the front edge portion 30a of the vertical plate portion 32 are formed in an arc shape when viewed from the outdoor unit 100. When viewed from the outdoor unit 100, the length of the front edge portion 30a is larger than the length of the rear edge portion 30b. Therefore, the wall forming the bent portion 33 is formed so as to spread from the rear edge portion 30b to the front edge portion 30a. The vertical plate portion 32 covers a part of the lower part of the heat sink 15 and a part of the heat sink 15 on the side opposite to the machine room 9 when the electrical component box 13 is arranged on the partition plate 7.

The air guide 30 further includes an upper engaging portion 35 and a lower engaging portion 36. The upper engagement portion 35 is a plate-shaped member provided on the upper edge portion 32b of the vertical plate portion 32. The upper engagement portion 35 comes into contact with the lower wall portion 17a1 of the frame body portion 17a when the air guide 30 is attached to the heat sink support 17. The upper engaging portion 35 has an upper fixing hole 35a and a boss portion 35b. The upper fixing hole 35a is a through hole formed in the upper engaging portion 35 and communicates with the lower wall hole portion 17a2 formed in the lower wall portion 17a1 when the air guide 30 is attached to the heat sink support 17. A fixing member 34 such as a screw for fixing the air guide 30 to the heat sink support 17 is inserted into the lower wall hole portion 17a2 and the upper fixing hole 35a. The boss portion 35b is a convex portion protruding in a pillar shape. The boss portion 35b is inserted into the boss hole portion 17a3 formed in the lower wall portion 17a1 when the air guide 30 is attached to the heat sink support 17. The boss portion 35b is used as positioning when fixing the air guide 30 to the heat sink support 17.

The lower engaging portion 36 is formed on the other side edge portion 31b with respect to the side edge portion 31a of the bottom plate portion 31. That is, the lower engaging portion 36 is provided on the side edge portion 31b of the bottom plate portion 31 opposite to the side where the vertical plate portion 32 is formed. The lower engagement portion 36 has an engagement bottom wall portion 36a formed in a plate shape and an engagement side wall portion 36d formed so as to stand up from the engagement bottom wall portion 36a.

The engagement bottom wall portion 36a contacts the attachment portion 17f when the air guide 30 is attached to the heat sink support 17. The engagement bottom wall portion 36a has a cover portion 36b and a fixing portion 36e. A lower fixing hole 36c is formed in the engaging bottom wall portion 36a.

The cover portion 36b is a recess formed in the engagement bottom wall portion 36a. The cover portion 36b has a bottom surface portion 36b2 and side surface portions 36b1 forming three side surfaces, and is formed in a container shape in which a side surface opposite to the engaging side wall portion 36d and an upper surface are opened. The cover portion 36b covers the ventilation holes 17f1 formed in the attachment portion 17f of the heat sink support 17 when the air guide 30 is attached to the heat sink support 17.

The fixing portion 36e is a plate-like member that is provided so as to project from the upper surface portion of the engagement bottom wall portion 36a and extend to the side opposite to the engagement side wall portion 36d. The fixed portion 36e is formed, for example, as a flat member having a protruding portion. When the air guide 30 is attached to the heat sink support 17, the fixing portion 36e is accommodated in the accommodation portion 17g formed in the attachment portion 17f and engages with the accommodation portion 17g.

The lower fixing hole 36c is a through hole formed in the engagement bottom wall portion 36a and communicates with the mounting hole 17f2 formed in the mounting portion 17f when the air guide 30 is mounted on the heat sink support 17. A fixing tool 34 such as a screw for fixing the air guide 30 to the heat sink support 17 is inserted into the mounting hole 17f2 and the lower fixing hole 36c.

The engagement side wall portion 36d is a side wall formed so as to stand up from the engagement bottom wall portion 36a, and is formed substantially perpendicular to the engagement bottom wall portion 36a. The engagement bottom wall portion 36a is formed on one plate surface side of the engagement side wall portion 36d, and the bottom plate portion 31 is formed on the other plate surface side of the engagement side wall portion 36d. That is, the engagement bottom wall portion 36a and the bottom plate portion 31 are formed on the opposite sides via the engagement side wall portion 36d. The engagement bottom wall portion 36a is formed at the lower end portion 36d1 of the engagement side wall portion 36d. The bottom plate portion 31 is formed from the upper end portion 36d2 of the engagement side wall portion 36d to the lower end portion 36d1. The rear edge portion 30b of the bottom plate portion 31 is located on the upper end portion 36d2 side of the engagement side wall portion 36d, and the front edge portion 30a of the bottom plate portion 31 is located on the lower end portion 36d1 side of the engagement side wall portion 36d. The engagement side wall portion 36d faces the side wall portion 17b of the heat sink support 17 when the air guide 30 is attached to the heat sink support 17.

FIG. 9 is an enlarged front view of a state where the electrical component box 13 and the partition plate 7 of the outdoor unit 100 according to the embodiment of the present invention are assembled. When the electrical component box 13 and the partition plate 7 are assembled, the heat sink support 17 is disposed above the partition plate 7, and the mounting portion 17f of the heat sink support 17 and the mounting plate portion 7e come into contact with each other. Then, when the electric component box 13 is placed on the partition plate 7, the heat sink support 17 is placed on the upper surface portion of the mounting plate portion 7e of the partition plate 7. The outdoor unit 100 can discharge the heat generated in the machine room 9 to the blower room 8 through the ventilation hole 17f1 by forming the ventilation hole 17f1 in the mounting portion 17f of the heat sink support 17.

FIG. 10 is a perspective view showing a state where the air guide 30 of the outdoor unit 100 according to the embodiment of the present invention is attached to the heat sink support 17. The direction FL represented by the dotted arrow represents the direction in which the air passing through the heat sink 15 flows. The air guide 30 is fixed to the heat sink support 17 by a fixing tool 34. When the air guide 30 is fixed to the heat sink support 17, the upper engagement portion 35 is fixed to the frame body portion 17a, and the lower engagement portion 36 is fixed to the attachment portion 17f. When the air guide 30 is attached to the heat sink support 17, the above-described boss portion 35b is inserted into the boss hole portion 17a3, and the air guide 30 is positioned with respect to the heat sink support 17.

When the air guide 30 is fixed to the heat sink support 17 by the fixture 34, the air guide 30 covers at least a part of the protruding direction of the heat sink 15 and the side of the protruding direction. More specifically, the heat sink 15 is formed so as to project downward (in the Z2 direction) from the electrical component box 13. Then, the air guide 30 is arranged on the upstream side of the heat sink 15 in the flowing direction FL of the air passing through the heat sink 15, and at least part of the side (X1 side) and the lower side (Z2 side) of the heat sink 15 is disposed. cover. At this time, the bottom plate portion 31 covers the lower side (Z2 side) of the heat sink 15, the vertical plate portion 32 covers the side surface (X1 side) of the heat sink 15, and the bent portion 33 includes the bottom plate portion 31 and the vertical plate portion 32. It is located between. The air guide 30 is not limited to the configuration that covers the projecting direction and a part of the side in the projecting direction, and the air guide 30 has a configuration that covers the projecting direction and the entire side in the projecting direction. Good. Therefore, the air guide 30 is not limited to a structure that covers a part of the side (X1 side) and the lower side (Z2 side) of the heat sink 15, but the side (X1 side) and the lower side (Z2 side) of the heat sink 15. ) May be entirely covered.

When the air guide 30 is fixed to the heat sink support 17 by the fixing tool 34, the fixing portion 36e of the air guide 30 is stored in the storage portion 17g of the heat sink support 17, as shown in FIG.

As shown in FIG. 10, the air guide 30 has a front edge portion 30a and a rear edge portion 30b. The front edge portion 30a is formed by the bottom plate portion 31, the vertical plate portion 32, and the bent portion 33, and forms an upstream edge portion in the flow direction of the air passing through the heat sink 15. The rear edge portion 30b is formed by the bottom plate portion 31, the vertical plate portion 32, and the bent portion 33, and forms a downstream edge portion in the flow direction of the air passing through the heat sink 15.

When the air guide 30 is fixed to the heat sink support 17, an opening that gradually widens outward from the rear edge portion 30b toward the front edge portion 30a is formed. In the outdoor unit 100, the front edge portion 30a, the frame body portion 17a, and the side wall portion 17b form an upstream side opening portion 37a that is an upstream side opening of the air guide 30. Further, in the outdoor unit 100, the trailing edge portion 30b, the plate-shaped portion 15a, and the side wall portion 17b form a downstream opening portion 37b that is an opening on the downstream side of the air guide 30. The upstream opening 37a formed by the leading edge 30a forms a larger opening than the downstream opening 37b formed by the trailing edge 30b in order to collect air for cooling the heat sink 15. .. The bottom plate portion 31, the vertical plate portion 32, and the bent portion 33 are each formed so as to form a curved surface, and the opening is formed such that the opening gradually increases from the rear edge portion 30b toward the front edge portion 30a. There is. The opening formed by the front edge portion 30a is connected to the air passage formed by the vertical plate portion 32 and the bottom plate portion 31 that cover the fins 15b of the heat sink 15. The front edge portion 30a of the air guide 30 is arranged so as to face the heat exchanger 10, and the air that has passed through the heat exchanger 10 by the drive of the blower 5 passes through the opening formed by the front edge portion 30a. To do. The air passing through the opening formed by the front edge portion 30a is guided to the heat sink 15 along the flow path formed by the wall surfaces of the vertical plate portion 32 and the bottom plate portion 31. Since the walls of the vertical plate portion 32 and the bottom plate portion 31 form curved surfaces, air can be guided from the front edge portion 30a to the heat sink 15 without ventilation resistance.

Between the front edge portion 30a and the rear edge portion 30b, the upper fixing hole 35a is formed on the rear edge portion 30b side, and the lower fixing hole 36c is formed on the front edge portion 30a side. Further, between the side edge portion 31a and the side edge portion 31b of the bottom plate portion 31, the upper fixing hole 35a is formed on the side edge portion 31a side, and the lower fixing hole 36c is formed on the side edge portion 31b side. There is. Therefore, the air guide 30 is fixed to the heat sink support 17 on a diagonal line of the bottom plate portion 31 in a plan view in a direction perpendicular to the base 4. Therefore, the air guide 30 is fixed to the heat sink support 17 in a stable state.

The cover portion 36b covers the ventilation hole 17f1 formed in the attachment portion 17f of the heat sink support 17 when the air guide 30 is attached to the heat sink support 17. The cover portion 36b can prevent rainwater from entering the inside of the electrical component box 13 even when the outdoor unit 100 is exposed to the weather. The cover portion 36b is a recess formed in the engagement bottom wall portion 36a. The cover portion 36b has a side surface portion 36b1 and a bottom surface portion 36b2, and is formed in a container shape in which a side surface and an upper surface opposite to the engaging side wall portion 36d are opened. Therefore, the air blown from the machine room 9 to the cover part 36b through the ventilation holes 17f1 enters the cover part 36b through the opening on the upper surface of the cover part 36b, and is discharged into the blower room 8 through the opening on the side surface. ..

FIG. 11 is a perspective view showing a state where the electrical component box 13 of the outdoor unit 100 according to the embodiment of the present invention is attached to the partition plate 7. When the electrical component box 13 is arranged on the upper part of the partition plate 7, the mounting part 17f contacts the plate-shaped mounting plate part 7e formed on the upper part of the partition plate 7, and the fixing part 36e is the storage part. It is stored at 17g. Further, when the electrical component box 13 is arranged above the partition plate 7, the fixing portion 36e is sandwiched between the storage portion 17g of the heat sink support 17 and the mounting plate portion 7e of the partition plate 7. Therefore, when the electrical component box 13 is attached to the upper portion of the partition plate 7, the air guide 30 is sandwiched between the heat sink support 17 and the partition plate 7, and is more stably fixed to the electrical component box 13.

Returning to FIG. 5, the electrical component box 13 may further include a terminal block support 21. The terminal block support 21 is equipped with a terminal block (not shown), and this terminal block supplies power for driving the control board 14. For example, a plug of wiring connected to an external commercial power source via the service cover 2d is connected to the terminal block. The terminal block is fixed to the terminal block support 21 with screws or the like (not shown). Further, the terminal block support 21 is fixed to the substrate holder 16 with screws or the like. The terminal block support 21 is arranged in the machine room 9 inside the housing 50, and is attached to the end portion of the substrate holder 16 on the side of the third side surface portion 2 a of the rear panel 2. The terminal block support 21 is arranged so as to extend downward (Z2 direction) toward the base 4 from the end of the substrate holder 16 on the side of the third side surface 2a of the rear panel 2.

[Operation of the outdoor unit 100]
When the outdoor unit 100 is driven, the blower 5 is driven to increase the efficiency of heat exchange between the refrigerant flowing in the heat exchanger 10 and the outdoor air. The blower 5 makes a negative pressure between the heat exchanger 10 and the propeller fan 5b, introduces outside air into the housing 50 from the back side (Y2 side) of the housing 50, and introduces the outside air into the outdoor unit 100. The outside air thus discharged is discharged from the front side (Y1 side) of the outdoor unit 100 toward the outside of the housing 50. At this time, inside the housing 50, a part of the air that has passed through the heat exchanger 10 passes through the front edge portion 30 a of the air guide 30 that faces the heat exchanger 10. Since the front edge portion 30a forms a larger opening than the rear edge portion 30b, a part of the air that has passed through the heat exchanger 10 can be efficiently collected in the air guide 30. The air collected by the air guide 30 flows along the bottom plate portion 31, the vertical plate portion 32, and the bent portion 33 of the air guide 30, is guided to the heat sink 15, and flows along the surface of the heat sink 15.

[Operation and effect of outdoor unit 100 of air conditioner]
The outdoor unit 100 of the air conditioner has an air guide 30 that forms an air passage that guides the air sucked into the housing 50 by the blower 5 to the heat sink 15. In the outdoor unit 100 of the air conditioner, since the air sucked into the housing 50 by the blower 5 can be guided to the heat sink 15 by forming the air passage using the air guide 30, the heat sink 15 is enlarged. The heat dissipation efficiency of the heat sink 15 can be improved without the need. As a result, the outdoor unit 100 of the air conditioner can improve the cooling efficiency of the heating element 14a without increasing the size of the heat sink 15.

Further, the air guide 30 is formed so as to extend in the flow direction of the air passing through the inside of the housing 50. Therefore, the air guide 30 can reduce the ventilation resistance and guide the air to the heat sink 15. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

Further, the air guide 30 is formed so as to extend in the front-rear direction (Y-axis direction) of the housing 50. Therefore, the air guide 30 can specify the flow direction of the air passing through the inside of the housing 50, and can guide the air to the heat sink 15. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

Also, the air guide 30 is formed so as to cover at least a part of the protruding direction of the heat sink 15 and the side of the protruding direction. Therefore, the air guide 30 can specify the flowing direction of the air passing through the inside of the housing 50, and the air can be efficiently applied to the heat sink 15. As a result, the air guide 30 can improve the heat dissipation efficiency of the heat sink 15.

Further, the air guide 30 is arranged on the upstream side of the heat sink 15 in the flowing direction FL of the air passing through the heat sink 15, and covers at least a part of the side and the lower side of the heat sink 15. Therefore, the air guide 30 can collect the air passing through the heat sink 15 on the upstream side of the heat sink 15 and flow the air from the upstream side to the downstream side of the heat sink 15. As a result, the air guide 30 can efficiently apply the air to the heat sink 15, and the heat dissipation efficiency of the heat sink 15 can be improved.

Further, the air guide 30 includes a bottom plate portion 31 that covers the lower side of the heat sink 15, a vertical plate portion 32 that covers the heat sink 15 laterally, and a bent portion 33 that is arranged between the bottom plate portion 31 and the vertical plate portion 32. , With. Therefore, the air guide 30 can flow air along the bottom plate portion 31 that covers the heat sink 15 and the vertical plate portion 32, and the air can be efficiently applied to the heat sink 15. As a result, the air guide 30 can improve the heat dissipation efficiency of the heat sink 15.

Further, the outdoor unit 100 of the air conditioner has a heat sink support 17 that supports the heat sink 15 and fixes the electrical component box 13 to the partition plate 7. The heat sink support 17 has a frame body portion 17a, a side wall portion 17b, and a mounting portion 17f. Since the outdoor unit 100 has the heat sink support 17, the air passage formed by the air guide 30 can be further specified. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

Further, in the outdoor unit 100 of the air conditioner, the upstream side opening 37a formed by the front edge portion 30a, the frame body portion 17a, and the side wall portion 17b has a rear edge portion 30b, a plate-shaped portion 15a, It is formed larger than the downstream opening 37b formed by the side wall 17b. Therefore, the outdoor unit 100 of the air conditioner can collect a large amount of air passing through the inside of the housing 50 by driving the blower 5 as compared with a simple tubular flow path. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

The bottom plate portion 31, the vertical plate portion 32, and the bent portion 33 of the air guide 30 are formed so as to form curved surfaces, respectively, and the opening gradually increases from the rear edge portion 30b toward the front edge portion 30a. Is formed. Therefore, the air guide 30 can reduce the ventilation resistance and guide the air to the heat sink 15. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

Further, the air guide 30 is fixed to the heat sink support 17 by the fixing tool 34. Therefore, the position of the air guide 30 is reliably fixed in relation to the heat sink 15, and the position of the air guide 30 is not displaced with respect to the heat sink 15. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

Further, the air guide 30 has a heat sink support 17 and a fixing portion 36e sandwiched between the partition plate 7 when the electrical component box 13 is arranged above the partition plate 7. Therefore, when the electrical component box 13 is attached to the upper portion of the partition plate 7, the air guide 30 is sandwiched between the heat sink support 17 and the partition plate 7, and is more stably fixed to the electrical component box 13. The position of the air guide 30 is securely fixed in relation to the heat sink 15, and the position of the air guide 30 does not deviate from the heat sink 15. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

Further, when the electrical component box 13 is arranged on the upper part of the partition plate 7, the mounting part 17f contacts the plate-shaped mounting plate part 7e formed on the upper part of the partition plate 7, and the fixing part 36e is It is stored in the storage portion 17g. Therefore, the electric component box 13 is stably held with respect to the partition plate 7, and the air guide 30 is sandwiched between the heat sink support 17 and the partition plate 7, and further stably fixed to the electric component box 13. It The position of the air guide 30 is securely fixed in relation to the heat sink 15, and the position of the air guide 30 does not deviate from the heat sink 15. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

Further, when the air guide 30 is fixed to the heat sink support 17, the upper engagement portion 35 is fixed to the frame body portion 17a, and the lower engagement portion 36 is fixed to the attachment portion 17f. Therefore, the position of the air guide 30 is reliably fixed in relation to the heat sink 15, and the position of the air guide 30 is not displaced with respect to the heat sink 15. As a result, the air guide 30 can apply the air to the heat sink 15 more efficiently, and the heat dissipation efficiency of the heat sink 15 can be improved.

Also, when the air guide 30 is attached to the heat sink support 17, the boss portion 35b is inserted into the boss hole portion 17a3. Therefore, an operator can easily position the air guide 30 with respect to the heat sink support 17 when attaching the air guide 30 to the heat sink support 17.

Further, when the air guide 30 is attached to the heat sink support 17, the cover portion 36b covers the ventilation hole 17f1. By providing the cover portion 36b on the air guide 30, it is possible to prevent rainwater from entering the inside of the electrical component box 13 even when the outdoor unit 100 is exposed to wind and rain. The cover part 36b has a bottom face part 36b2 and a side face part 36b1 forming three side faces, and is formed in a vessel shape with one side face and an upper face opened. Therefore, the air guide 30 takes in the air blown from the machine chamber 9 to the cover portion 36b through the ventilation holes 17f1 into the cover portion 36b through the opening on the upper surface of the cover portion 36b, and the inside of the blower chamber 8 through the opening on the side surface. Can be discharged to.

The embodiment of the present invention is not limited to the above embodiment. For example, the fixture 34 for fixing the air guide 30 and the heat sink support 17 to each other is not limited to screws, but may be any one that can fix the wall portions to each other, and may be, for example, a rivet or the like. ..

1 front panel, 1a first side part, 1b second side part, 1c outlet, 2 back panel, 2a third side part, 2b fourth side part, 2d service cover, 3 top panel, 4 Base, 4a leg part, 5 blower, 5a motor, 5b propeller fan, 6 fan guard, 7 partition plate, 7d partition wall part, 7d1 upper edge part, 7e mounting plate part, 8 blower room, 9 machine room, 10 heat exchange Vessels, 10a heat transfer tubes, 10b fins, 11 compressors, 12 refrigerant pipes, 13 electrical product boxes, 14 control boards, 14a heating elements, 15 heat sinks, 15a plate-shaped parts, 15b fins, 16 board holders, 16a frame side walls, 16b frame, 17 heat sink support, 17a frame body part, 17a1 lower wall part, 17a2 lower wall hole part, 17a3 boss hole part, 17b side wall part, 17b1 upper end part, 17b2 lower end part, 17c opening part, 17d vertical wall part, 17d1 Mounting surface part, 17e fixing screw hole, 17f mounting part, 17f1 ventilation hole, 17f2 mounting hole, 17g storage part, 19 heat sink holder, 20 electrical equipment box cover, 21 terminal block support, 22 motor support member, 30 air guide, 30a front Edge portion, 30b rear edge portion, 31 bottom plate portion, 31a side edge portion, 31b side edge portion, 32 vertical plate portion, 32a lower edge portion, 32b upper edge portion, 33 bent portion, 34 fixing tool, 35 upper engaging portion , 35a upper fixing hole, 35b boss portion, 36 lower engaging portion, 36a engaging bottom wall portion, 36b cover portion, 36b1 side surface portion, 36b2 bottom surface portion, 36c lower fixing hole, 36d engaging side wall portion, 36d1 lower end portion, 36d2 upper end, 36e fixed part, 37a upstream opening, 37b downstream opening, 50 housing, 100 outdoor unit.

Claims

A casing that forms the outer shell of the outdoor unit,
A blower that is disposed inside the housing and forms a flow of air passing through the housing;
A partition plate that is provided inside the casing and divides the space inside the casing into a fan chamber that houses the heat exchanger and the blower, and a machine chamber that houses the compressor,
An electric component box that stores a control board that controls the outdoor unit and is attached to the partition plate,
Equipped with
The electrical box is
A heat sink that is thermally connected to the heating element mounted on the control board, projects into the blower chamber, and dissipates heat generated from the heating element;
An air guide that forms an air passage that guides the air drawn into the housing by the blower to the heat sink;
An outdoor unit of an air conditioner.
The air guide is
The outdoor unit for an air conditioner according to claim 1, wherein the outdoor unit of the air conditioner is formed so as to extend in a direction in which air passing through the housing flows.
The air guide is
The outdoor unit for an air conditioner according to claim 1 or 2, which is formed so as to extend in the front-rear direction of the housing.
The air guide is
The outdoor unit for an air conditioner according to any one of claims 1 to 3, which covers at least a part of a protruding direction of the heat sink and a lateral side of the protruding direction.
The heat sink is
It is formed so as to project downward from the electrical component box,
The air guide is
The outdoor unit for an air conditioner according to claim 4, wherein the outdoor unit of the air conditioner is arranged upstream of the heat sink in a flow direction of air passing through the heat sink and covers at least a part of a side and a lower side of the heat sink.
The air guide is
A bottom plate portion that covers the lower side of the heat sink,
A vertical plate portion that covers the side of the heat sink,
A bent portion arranged between the bottom plate portion and the vertical plate portion,
The outdoor unit of the air conditioner according to claim 5, further comprising:
Further comprising a heat sink support for supporting the heat sink and fixing the electrical component box to the partition plate,
The heat sink support is
A frame portion fixed to a substrate holder to which the control substrate is attached, and fitted and fixed so that the heat sink projects.
A side wall portion formed so as to extend from the frame portion to the side opposite to the side where the control board is disposed, and the side wall portion facing the heat sink;
An attachment formed at an end portion on the opposite side of the frame body portion in the extending direction of the side wall portion and extending at the end portion in a direction opposite to the rising direction of the frame body portion with respect to the side wall portion. Department,
The outdoor unit of the air conditioner according to claim 6, further comprising:
The heat sink is
A plate-shaped portion covering the heating element,
A plurality of fins provided so as to extend from the plate-shaped portion,
Have
The air guide is
A front edge portion that is formed by the bottom plate portion, the vertical plate portion, and the bent portion, and forms an upstream edge portion in the flow direction of the air passing through the heat sink;
A rear edge portion that is formed by the bottom plate portion, the vertical plate portion, and the bent portion, and forms a downstream edge portion in the flow direction of the air passing through the heat sink;
Have
The upstream opening formed by the front edge portion, the frame body portion, and the side wall portion is a downstream opening portion formed by the rear edge portion, the plate-shaped portion, and the side wall portion. The outdoor unit for an air conditioner according to claim 7, which is formed to be larger than the above.
The bottom plate portion, the vertical plate portion, and the bent portion are each formed to form a curved surface, and the opening is formed so as to gradually increase from the rear edge portion toward the front edge portion. The outdoor unit of the air conditioner according to claim 8.
The air guide is
The outdoor unit for an air conditioner according to any one of claims 7 to 9, which is fixed to the heat sink support by a fixing tool.
The air guide is
When the electrical box is placed on top of the partition plate,
The outdoor unit for an air conditioner according to any one of claims 7 to 10, further comprising a fixing portion sandwiched between the heat sink support and the partition plate.
The mounting portion is formed with a storage portion that engages with the fixed portion,
When the electrical box is placed on top of the partition plate,
The mounting portion is in contact with a plate-shaped mounting plate portion formed on the upper portion of the partition plate,
The outdoor unit for an air conditioner according to claim 11, wherein the fixed portion is stored in the storage portion.
The air guide is
An upper engaging portion provided at the upper edge of the vertical plate portion,
A lower engaging portion provided at a side edge portion of the bottom plate portion on the side opposite to the side where the vertical plate portion is formed,
Have
When the air guide is fixed to the heat sink support,
The upper engaging portion is fixed to the frame body portion,
The outdoor unit for an air conditioner according to any one of claims 7 to 12, wherein the lower engaging portion is fixed to the mounting portion.
The upper engaging portion has a boss portion protruding in a pillar shape,
In the frame body portion, a boss hole portion formed in a concave shape is formed,
The outdoor unit for an air conditioner according to claim 13, wherein the boss portion is inserted into the boss hole portion when the air guide is attached to the heat sink support.
The mounting portion is formed with ventilation holes for discharging heat generated in the machine room to the blower room,
The lower engaging portion has a bottom surface portion and side surface portions forming three side surfaces, and has a cover portion formed in a cup shape with one side surface and an upper surface opened.
The outdoor unit for an air conditioner according to claim 13 or 14, wherein the cover portion covers the ventilation hole when the air guide is attached to the heat sink support.