JP6387527B2 - Air conditioner outdoor unit - Google Patents

Description

  The present invention relates to an outdoor unit of an air conditioner, and more particularly to an outdoor unit that can efficiently cool a heating element such as an electrical component.

  Conventionally, there is an outdoor unit of an air conditioner that cools an electrical component by introducing outside air into an electronic circuit board on which the electrical component is mounted (see, for example, Patent Documents 1 and 2).

  In the outdoor units described in Patent Documents 1 and 2, an electronic circuit board is provided in parallel on a partition plate that partitions the blower room and the machine room, and heat radiation fins for cooling the electronic circuit board are projected from the machine room to the blower room. It is attached to. Further, a part of the heat radiating fin is surrounded by the fin cover. In these outdoor units, the heat radiation fins are cooled while the outside air taken into the machine room from the ventilation port is led to the fin cover and reaches the blower room.

JP 2007-93116 A JP 2007-198684 A

  However, in the conventional outdoor unit, although a part of the heat radiating fin is covered, the surface on which the electric parts of the electronic circuit board are mounted is open to the machine room, so that the air introduced from the outside air is effective. In other words, the electric component cannot be applied to the electric component and the electric component cannot be efficiently cooled.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide an outdoor unit that can efficiently cool electrical components.

  In order to solve the conventional problems, an outdoor unit of the present invention includes a housing partition plate that partitions a blower chamber and a machine room, and a substrate storage unit provided in an upper part of the machine room, The storage portion includes a substrate chamber for storing a first electronic circuit board provided with electrical components, a heat dissipation fin chamber for storing heat dissipation fins thermally connected to the first electronic circuit board, and the substrate chamber. And a housing partition plate that divides the radiating fin chamber, the housing partition plate includes a first vent hole, the housing partition plate includes a second vent hole, and the radiating fin. The chamber communicates with the blower chamber via the first vent hole and communicates with the substrate chamber via the second vent hole.

  As a result, the electric components mounted on the inverter drive circuit board can be efficiently cooled by the air flowing through the heat radiation fin chamber.

  The outdoor unit of the present invention can efficiently cool electrical components.

The perspective view of the outdoor unit of embodiment of this invention. Front perspective view of an outdoor unit according to an embodiment of the present invention Sectional drawing shown in FIG. 2 of the outdoor unit of embodiment of this invention The disassembled perspective view of the board | substrate storage part in embodiment of this invention Sectional perspective view of the board | substrate storage part in embodiment of this invention Sectional perspective view of the board | substrate storage part in embodiment of this invention Sectional drawing shown in FIG. 2 of the outdoor unit of embodiment of this invention Sectional perspective view of the board | substrate storage part in embodiment of this invention The cross-sectional enlarged view of the board | substrate storage part in embodiment of this invention

  1st invention is provided in the upper part of the ventilation chamber provided with the fan, the machine room provided with the compressor, the housing partition plate which divides the said ventilation chamber and the said machine chamber, and the said machine chamber. And a board chamber that houses a first electronic circuit board provided with electrical components, and a heat radiation fin that is thermally connected to the first electronic circuit board. And a housing part partition plate that partitions the substrate chamber and the radiation fin chamber, the housing partition plate includes a first air hole, and the housing part partition plate The radiating fin chamber communicates with the blower chamber through the first vent hole and communicates with the substrate chamber through the second vent hole.

  According to this, the electric component mounted on the inverter drive circuit board can be efficiently cooled with the air flowing through the heat radiation fin chamber.

  According to a second aspect of the present invention, the storage part partition plate of the first invention holds the first electronic circuit board in parallel with the storage part partition plate. According to this, a board | substrate storage part can be reduced in size.

  According to a third aspect of the present invention, the substrate storage portion of the first or second aspect of the present invention includes a holding plate that holds the second electronic circuit board in parallel with the first electronic circuit board, and the holding plate includes the first electronic circuit board. The surface of the electronic circuit board on which the electrical component is provided is covered.

  According to this, the electric components mounted on the inverter drive circuit board can be efficiently cooled with the air flowing through the board chamber as the air path.

  According to a fourth aspect of the invention, the holding plate of the third aspect of the invention is provided with a third vent hole, and the substrate chamber communicates with the machine chamber via the third vent hole. According to this, since the inside of the substrate chamber is not provided with a hole communicating with others other than the low heat generating substrate storage box ventilation hole 14 and the radiation fin storage box ventilation hole 16, air can enter and exit outside the air passage. The electric parts can be efficiently cooled.

  5th invention makes the water which returns from an air passage which connects a ventilation chamber and a machine room efficiently through a water channel, and makes it drain from a drain hole by making the water channel and drainage hole which return to a ventilation chamber from a machine room. And the danger of the substrate being immersed in water can be avoided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment)
FIG. 1 is a perspective view of an outdoor unit of an air conditioner according to an embodiment of the present invention. FIG. 2 is a front perspective view of the outdoor unit of the air conditioner according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of the outdoor unit according to the embodiment of the present invention in the XX cross section shown in FIG.

  As shown in FIGS. 1 to 3, an outdoor unit 1 of an air conditioner includes a fan 2, a heat exchanger 3 and a compressor 4 that are components of a refrigeration cycle, inside a casing that forms an outer shell. I have. In addition, a housing partition plate 5 that partitions the interior of the housing into a blower chamber 101 and a machine chamber 102 is provided.

  The blower chamber 101 is provided with two fans 2 above and below via a fan motor base. The machine room 102 is provided with a substrate storage unit 6 for storing a compressor 4, refrigeration cycle components (not shown) such as a refrigerant pipe, a control board for controlling the fan 2, the compressor 4, and the like. Yes. The substrate storage unit 6 is disposed above the compressor 4.

  A substantially L-shaped heat exchanger 3 is arranged from the back surface of the outdoor unit 1 to one side surface. Of the heat exchanger 3, a portion provided with fins for heat exchange with air is disposed in the blower chamber 101. A connection portion with the refrigerant pipe provided at one end of the heat exchanger 3 is disposed in the machine room 102.

  A blower chamber front plate 103 is provided in front of the blower chamber 101. The blower chamber front plate 103 includes a bell mouth surrounding each of the two fans 2 and two blow grills 104 respectively provided on the front surfaces of the two bell mouths.

  On the other hand, a substantially L-shaped machine room front plate 105 is provided from the front surface to the side surface of the machine room 102. Further, a substantially L-shaped machine room rear plate 106 is provided from the back surface to the side surface of the machine room 102. An external ventilation hole 107 is provided in the lower part of the side surface of the machine room rear plate 106. FIG. 2 is a front view of the outdoor unit 1 with the machine room front plate 105 removed.

  The top surface of the outdoor unit 1 is covered with a top plate 108. The lower surface of the outdoor unit 1 is covered with a bottom plate 109. The fan motor base, the heat exchanger 3 and the compressor 4 are disposed on the bottom plate 109.

  The blower chamber front plate 103, the machine chamber front plate 105, the machine chamber rear plate 106, the top plate 108, and the bottom plate 109 constitute a part of the casing. The blower chamber 101 is a space covered with the casing and the casing partition plate 5 except for the portion where the heat exchanger 3 is provided and the opening of the bell mouth. The machine room 102 is a space covered with the housing and the housing partition plate 5. The machine room 102 communicates with the outside of the outdoor unit 1 through the external vent hole 107.

  The housing partition plate 5 is provided with a housing partition plate air vent 12 that allows the air blowing chamber 101 and the machine chamber 102 to communicate with each other. The casing partition plate air vent 12 opens between the fan 2 and the heat exchanger 3 in the front-rear direction of the outdoor unit 1. The casing partition plate air hole 12 is a first air hole in the present invention.

  The housing partition plate 5 is provided with a louver 18. The louver 18 covers the blower chamber 101 side of the housing partition plate air hole 12. The louver 18 includes a plurality of slats having longitudinal directions in the horizontal direction. Each of the slats is provided so as to be inclined downward toward the air blowing chamber 101 side from the housing partition plate 5.

  Next, the configuration of the substrate storage unit 6 will be described. FIG. 4 is an exploded perspective view of the substrate storage portion of the outdoor unit in the embodiment of the present invention. FIG. 5 is a cross-sectional perspective view of the substrate storage portion of the outdoor unit according to the embodiment of the present invention as seen from the back side in the YY cross section shown in FIG. 3. FIG. 6 is a cross-sectional perspective view of the substrate storage portion of the outdoor unit according to the embodiment of the present invention as viewed from the front side in the ZZ cross section shown in FIG.

The substrate storage unit 6 includes three boxes opened on one side, that is, a low heat generation substrate storage box 7, a high heat generation substrate storage box 8, and a radiation fin storage box 9. The substrate storage unit 6 is configured by stacking a low heat generation substrate storage box 7, a high heat generation substrate storage box 8, and a radiation fin storage box 9 in this order so that the opening of each box faces the front side of the outdoor unit 1. Has been.

  The board storage unit 6 includes an inverter drive circuit board 10 and a control circuit board 11. The inverter drive circuit board 10 is an electronic circuit board on which a plurality of electrical components for changing the rotation speed of the compressor 4 are mounted. The control circuit board 11 is an electronic circuit board on which a plurality of electrical components are mounted for driving the fan 2 and communicating with the indoor unit. For this reason, the inverter drive circuit board 10 generates more heat than the control circuit board 11.

  The inverter drive circuit board 10 is provided with heat radiation fins 13 on the surface opposite to the surface on which a plurality of electrical components are mainly mounted. The heat radiating fin 13 is composed of a base and a plurality of fins protruding from the base. The heat dissipating fins 13 are provided so that the surface on which the base fins are not provided faces the surface opposite to the surface on which the electrical components are mainly mounted on the inverter drive circuit board 10. The heat dissipating fins 13 are thermally connected to electric components having a large amount of heat generation among a plurality of electric components provided on the inverter drive circuit board 10. Specifically, one surface of the base portion of the radiating fin 13 and one surface of the electrical component having a large calorific value are in surface contact via a heat conductive paste (not shown).

  The inverter drive circuit board 10 is the first electronic circuit board of the present invention, and the control circuit board 11 is the second electronic circuit board of the present invention.

  The low heat generation substrate storage box 7 includes a flat surface portion 7a and side surface portions 7b to 7e that protrude from the four sides of the flat surface portion 7a to the front side of the outdoor unit 1, respectively. The low heat generation substrate storage box 7 is the holding plate of the present invention. Alternatively, in particular, the flat portion 7a of the low heat generating substrate storage box 7 is the holding plate of the present invention.

  The flat surface portion 7 a faces the back side of the outdoor unit 1, and the surface facing the flat surface portion 7 a is open to the machine room 102. The side surface portion 7b is a side surface located on the side close to the housing partition plate 5, and the side surface portion 7c is a side surface facing the side surface portion 7b. The side surface portion 7d is a side surface located on the side close to the top plate 108, and the side surface portion 7e is a side surface located on the side close to the bottom plate 109.

  The flat surface portion 7a includes a holding portion 7a1 that holds the control circuit board 11 in parallel with the flat surface portion 7a, a side surface side extending portion 7a2 that extends from the holding portion 7a1 toward the side surface portion 7b, and a lower portion than the holding portion 7a1. And a downward extending portion 7a3. The holding part 7a1 and the side surface extending part 7a2 constitute the same plane. The holding portion 7a1 and the downwardly extending portion 7a3 are smoothly connected via an inclined portion. The side surface portion 7 c is provided with a sub control circuit board that is connected to the control circuit board 11 and assists the control circuit board 11.

  The holding unit 7a1 holds the control circuit board 11 so that the surface of the control circuit board 11 on which mainly electrical components are mounted faces the front side of the outdoor unit 1. A terminal block for connecting a power supply line and a signal line for connecting to the control circuit board 11 is provided in the downward extending portion 7a3.

  The low heat generating substrate storage box 7 includes a low heat generating substrate storage box vent hole 14. The side surface extending portion 7a2 includes a first low heat generating substrate storage box ventilation hole 14a. The side surface portion 7b includes a second low heat generating substrate storage box vent hole 14b. The low heat generating substrate storage box vent 14 is the third vent in the present invention.

The high heat generation substrate storage box 8 includes a flat surface portion 8a and side surface portions 8b to 8e protruding from the four sides of the flat surface portion 8a to the front side of the outdoor unit 1, respectively. The vertical length of the outdoor unit 1 of the high heat generation substrate storage box 8 is shorter than the vertical length of the outdoor unit 1 of the low heat generation substrate storage box 7. The length in the left-right direction of the outdoor unit 1 of the high heat generation substrate storage box 8 is longer than the length of the outdoor unit 1 in the low heat generation substrate storage box 7.

  The flat portion 8 a faces the back side of the outdoor unit 1, and the surface facing the flat portion 8 a is covered with the flat portion 7 a of the low heat generating substrate storage box 7. The side surface portion 8b is a side surface located on the side close to the housing partition plate 5, and the side surface portion 8c is a side surface facing the side surface portion 8b. The side surface portion 8d is a side surface located on the side close to the top plate 108, and the side surface portion 8e is a side surface located on the side close to the bottom plate 109.

  The flat surface portion 8a includes a holding portion 8a1 that holds the inverter drive circuit board 10 in parallel with the flat surface portion 8a, and a side surface side extending portion 8a2 that extends from the holding portion 8a1 toward the side surface portion 8c. The holding portion 8a1 and the side surface extending portion 8a2 constitute the same plane.

  The holding unit 8a1 holds the inverter drive circuit board 10 so that the surface on which the electrical components of the inverter drive circuit board 10 are mainly mounted faces the front side of the outdoor unit 1.

  The side surface portion 8 b is fixed to the housing partition plate 5 in parallel with the main surface of the housing partition plate 5. The side surface portion 8b is higher than the side surface portion 8c (length in the front-rear direction of the outdoor unit 1), and a folded portion 8b1 is provided at the upper end (end portion on the front side of the outdoor unit 1). The folded portion 8b1 is fixed to the housing partition plate 5 or the blower chamber front plate 103. The upper ends of the side surface portions 8 c to 8 e (the end portion on the front side of the outdoor unit 1) are in contact with the back surface of the flat surface portion 7 a of the low heat generating substrate storage box 7.

  A predetermined gap is provided between the flat portion 8 a of the high heat generating substrate storage box 8 and the back surface of the flat portion 7 a of the low heat generating substrate storage box 7. Further, a predetermined gap is provided between the side surface portion 8 b of the high heat generation substrate storage box 8 and the side surface portion 7 b of the low heat generation substrate storage box 7.

  The side surface extending portion 8 a 2 includes a high heat generating substrate storage box vent hole 15. The high heat generating substrate storage box vent 15 is a second vent in the present invention.

  The radiating fin storage box 9 includes a flat surface portion 9a and upper and lower sides of the outdoor unit 1 of the radiating fin storage box 9 provided with side portions 9b to 9e protruding from the four sides of the flat surface portion 9a to the front side of the outdoor unit 1, respectively. The length in the direction is shorter than the length in the vertical direction of the outdoor unit 1 of the high heat generation substrate storage box 8. The length in the left-right direction of the outdoor unit 1 of the radiating fin storage box 9 is substantially equal to or slightly shorter than the length of the outdoor unit 1 in the high heat generation substrate storage box 8.

  The flat surface portion 9 a faces the back side of the outdoor unit 1, and the surface facing the flat surface portion 9 a is covered with the flat surface portion 8 a of the high heat generating substrate storage box 8. The side surface portion 9b is a side surface located on the side close to the housing partition plate 5, and the side surface portion 9c is a side surface facing the side surface portion 9b. The side surface portion 9d is a side surface located on the side close to the top plate 108, and the side surface portion 9e is a side surface located on the side close to the bottom plate 109.

  The flat surface portion 9 a is provided in parallel with the flat surface portion 8 a of the high heat generating substrate storage box 8 with a predetermined gap from the fin tips of the heat radiating fins 13.

  The upper ends of the side surface portions 8 b to 8 e (the end portion on the front side of the outdoor unit 1) are in contact with the back surface of the flat surface portion 8 a of the high heat generating substrate storage box 8. The side surface portion 9 b is provided in parallel with the main surface of the housing partition plate 5. The side surface portion 9 b includes a heat radiating fin storage box air hole 16. The radiating fin storage box vent 16 has substantially the same opening area as the casing partition plate vent 12. The openings of the heat radiating fin storage box vent 16 and the housing partition plate vent 12 overlap each other.

  The side surface portion 9d has an opening at the center. The side surface portion 9d has an inclination toward the central opening. A water tray 17 is provided below the side surface portion 9d. A water tray 17 is provided below the side surface portion 9d. The bottom surface of the water tray 17 is inclined toward a water return portion (not shown) provided at an end portion on the housing partition plate 5 side. The water return portion is connected to a small-diameter water return hole (not shown) provided below the housing partition plate ventilation hole 12 of the housing partition plate 5.

  By combining the low heat generation substrate storage box 7, the high heat generation substrate storage box 8 and the heat radiation fin storage box 9, the flat portion 8 a of the high heat generation substrate storage box becomes the storage portion partition plate. The storage partition plate divides the substrate storage 6 into a substrate chamber 6a and a radiating fin chamber 6b. The inverter drive circuit board 10 may constitute a part or main part of the storage part partition plate.

  The substrate chamber 6a is a space defined by the low heat generating substrate storage box 7 and the high heat generating substrate storage box 8, and stores the surface of the inverter drive circuit substrate 10 on which mainly electrical components are mounted. More specifically, the substrate chamber 6a is covered with the back surface of the flat surface portion 7a of the low heat generating substrate storage box 7, the flat surface portion 8a of the high heat generating substrate storage box 8, and the side surface portions 8b to 8e. The substrate chamber 6a has a low heat generating substrate storage box vent hole 14 at one end, a high heat generating substrate storage box vent hole 15 at the other end, and the low heat generating substrate storage box vent hole 14 through the high heat generating substrate storage box vent hole. The wind path to 15 is constituted. The substrate chamber 6a may be configured by a control circuit board 11 instead of the flat surface portion 7a of the low heat generation substrate storage box 7 in a part or a main part of one surface thereof. That is, instead of the holding plate of the present invention, the control circuit board 11 may cover the surface of the inverter drive circuit board 10 on which the electrical components are provided.

  The radiating fin chamber 6 b is a space defined by the high heat generating substrate storage box 8 and the radiating fin storage box 9 and stores the radiating fins 13. More specifically, the radiating fin chamber 6b is covered with the back surface of the flat surface portion 8a of the high heat generating substrate storage box 8, the flat surface portion 9a of the radiating fin storage box 9, and the side surface portions 9b to 8e. The radiating fin chamber 6b has a high heat generating substrate storage box vent 15 on one end side, a heat radiating fin storage box vent 16 on the other end, and the radiating fin storage box vent 16 from the high heat generating substrate storage box vent 15. The wind path leading to In addition, a part or a main part of one surface of the radiating fin chamber 6 b may be configured by the inverter drive circuit board 10 in place of the flat part 8 a of the high heat generating board storage box 8.

  By combining the low heat generation substrate storage box 7, the high heat generation substrate storage box 8, and the heat radiation fin storage box 9, the substrate chamber 6 a and the heat radiation fin storage box ventilation hole 16 that have no open portions other than the low heat generation substrate storage box air holes 14 are eliminated. And a heat dissipating fin chamber 6b in which an open portion other than the above is eliminated.

Furthermore, a water tray is provided at the lower part of the heat radiation fin chamber 6b.
FIG. 8 is a cross-sectional perspective view of the substrate storage portion in the embodiment of the present invention. FIG. 9 is an enlarged cross-sectional view of the substrate storage portion in the embodiment of the present invention.

  The flat plate 110 is configured so as to close the hole connected to the water tray 17 and the blower chamber. A louver drain hole 112 is formed through a contact point between the flat plate 110 and the louver portion of the housing partition plate 5. The water tray rib 111 is configured to eliminate the contact portion between the water tray 17 and the housing partition plate 5. A radiating fin storage box bottom 113 having a throttle structure is formed at the bottom of the radiating fin storage box 9 so as to reduce the area of the portion where water drops from the radiating fin storage box 9 to the water tray.

  About the outdoor unit comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

When the air conditioner starts operation, the fan 2 is driven by the motor, and the space between the fan 2 and the heat exchanger 3 in the blower chamber 101 becomes negative pressure. Thereby, the air outside the outdoor unit 1 flows into the blower chamber 101 through the fins of the heat exchanger 3. And in the heat exchanger 3, the refrigerant | coolant which flows through the inside of the heat exchanger tube of the heat exchanger 3, and the air which flows between fins heat-exchange. The heat-exchanged air passes through the opening of the bell mouth and is discharged to the outside of the outdoor unit 1 again.

  Further, since the space between the fan 2 and the heat exchanger 3 in the blower chamber 101 becomes negative pressure, the air outside the outdoor unit 1 flows into the machine chamber 102 via the external vent hole 107. . In the machine room 102, the air rises to the vicinity of the substrate storage unit 6. As shown by arrows in FIG. 3 or FIG. 6, the air flows into the substrate chamber 6 a through the low heat generating substrate storage box vent hole 14. The air that has flowed into the substrate chamber 6a is the surface of the inverter drive circuit board 10 on which mainly electrical components are mounted, the back surface of the flat surface portion 7a of the low heat generation substrate storage box 7, or a part or the main part of the control circuit board 11. The electric components mounted on the inverter drive circuit board 10 are cooled.

  Thereafter, the air that has cooled the electrical components flows into the radiating fin chamber 6 b through the high heat generating substrate storage box vent hole 15. The air flowing into the radiation fin chamber 6b flows through the back surface of the flat portion 8a of the high heat generating substrate storage box 8 or between the radiation fin 13 and the planar portion 9a of the radiation fin storage box 9 to cool the radiation fin 13. To do. Thereafter, the air that has cooled the radiating fins 13 flows into the blower chamber 101 through the radiating fin housing box vent 16 and the housing partition plate vent 12.

  As described above, in the present embodiment, the substrate chamber 6a and the radiating fin chamber 6b are formed in the substrate storage unit 6, and the air introduced from the outside is caused to flow using these chambers as air paths. As a result, the electric components mounted on the inverter drive circuit board 10 can be efficiently cooled.

  In particular, in the case where the substrate storage unit 6 eliminates the open portion other than the low heat generation substrate storage box ventilation hole 14 and the radiation fin storage box ventilation hole 16, air does not enter and exit from other than the air path, and the outside air temperature is high. However, the electrical components and the heat radiation fins 13 can be efficiently cooled.

  Further, in the present embodiment, the substrate chamber 6a has no openings other than the low heat generating substrate storage box vent hole 14 and the high heat generating substrate storage box vent hole 15, so that air enters and exits from other than these vent holes. There is nothing. For this reason, the air that has entered through the low heat generating substrate storage box vent hole 14 efficiently hits the electrical component, and the electrical component can be efficiently cooled even when the outside air temperature is high.

  The distance between the flat portion 8a of the high heat generating substrate storage box 8 and the back surface of the flat portion 7a of the low heat generating substrate storage box 7 is such that the back surface of the flat portion 7a of the low heat generating substrate storage box 7 is on the inverter drive circuit board 10. The smaller one is desirable on the assumption that it does not interfere with electronic components. This is because the flow velocity of the air flowing through the substrate chamber 6a is increased, and the cooling efficiency of the electronic components is improved.

  Moreover, in this Embodiment, since the radiation fin chamber 6b is not provided with openings other than the high heat-generating substrate storage box ventilation hole 15 and the radiation fin storage box ventilation hole 16, air enters and exits from other than these ventilation holes. There is nothing. For this reason, the air that has entered through the highly heat-generating substrate storage box ventilation holes 15 efficiently flows through the radiation fins 13, so that the radiation fins 13 can be efficiently cooled even when the outside air temperature is high.

  In addition, it is desirable that the clearance between the tip of the radiation fin 13 and the flat portion 9a of the radiation fin storage box 9 is small. This is because the flow velocity of the air flowing between the fins of the heat dissipating fins 13 is increased, and the cooling efficiency is improved.

In the present embodiment, the inverter drive circuit is more efficient by flowing air in the order of the substrate chamber 6a and the radiating fin chamber 6b than in the case of flowing air in the order of the radiating fin chamber 6b and the substrate chamber 6a. The electrical component mounted on the substrate 10 can be cooled. This is because when the air flows in the order of the radiation fin chamber 6b and the substrate chamber 6a, the temperature of the air after flowing through the radiation fin chamber 6b does not rise, and when the electrical components are cooled in the substrate chamber 6a, This is because the temperature difference from the electrical component is reduced and the efficiency is lowered.

  Further, in the present embodiment, the low heat generating substrate storage box vent 14 is provided in the vicinity of one end of the control circuit substrate 11. In addition, the first low heat generating substrate storage box vent hole 14 a is provided on a surface parallel to the main surface of the control circuit board 11, and the second low heat generating substrate storage box vent hole 14 b is perpendicular to the main surface of the control circuit board 11. On the surface. Thus, the electrical components mounted on the control circuit board 11 can also be cooled by the air flowing from the machine room 102 to the low heat generating board storage box vent hole 14. Further, it is possible to secure a sufficient amount of air flowing from the machine chamber 102 to the substrate chamber 6a.

  Next, a description will be given of a case where water droplets enter the blower chamber 101 between the fins of the heat exchanger 3 or from the opening of the bell mouth. When such water droplets reach the substrate storage unit 6, there is a possibility that the inverter drive circuit board 10, the circuit of the control circuit board 11, and the like are short-circuited.

  However, in the present embodiment, the louver 18 is provided in the housing partition plate vent hole 12 to prevent water droplets from entering the radiating fin chamber 6b from the blower chamber 101.

  Even when water droplets enter the radiating fin chamber 6 b, the water droplets gather at the central opening along the inclination of the side surface portion 9 d and flow down to the water receiving tray 17. And it gathers in a water return part along the inclination of the bottom face of the water receiving tray 17, and is returned to the ventilation chamber 101 through a water return hole.

  The water discharge will be described in more detail.

The water that has entered the machine room from the louver 18 of the housing partition plate 5 from the air blowing chamber is received by the water receiving tray 17, and the water flows from the flat plate notch 114 to the air blowing room. Can prevent falling.
It is possible to prevent the water from entering from the passage hole of the water flowing out from the water tray 17 with a flat plate.
The water that collects at the contact portion between the flat plate 110 and the housing partition plate 5 can escape from the louver drain hole 112.
By preventing the housing partition plate and the water receiving tray from coming into contact with the water receiving tray rib 111, water is prevented from falling from the contact portion between the water receiving tray 17 and the housing partition plate 5 to the machine room side due to surface tension. By making the radiating fin storage box bottom 113 small, it is possible to prevent the flow of wind from being hindered.

  As described above, in the present embodiment, the vent hole communicating with the blower chamber 101 is provided in the radiating fin chamber 6b and not directly provided in the substrate chamber 6a, so that water droplets enter the substrate chamber 6a, and the inverter drive circuit It is possible to prevent the circuit of the substrate 10 from being short-circuited.

  Since the substrate storage unit 6 is provided above the external ventilation hole 107, there is no possibility that water droplets that have entered the machine chamber 102 from the external ventilation hole 107 reach the substrate storage unit 6.

  The present invention is not only an outdoor unit of an air conditioner in which one indoor unit is connected to a single outdoor unit, but also a multi-type air conditioner in which a plurality of indoor units are connected to a single outdoor unit. It can be applied to any outdoor unit. Moreover, it is applicable not only to an air conditioner but also as an outdoor unit of a heat pump type hot water heater.

DESCRIPTION OF SYMBOLS 1 Outdoor unit 2 Fan 3 Heat exchanger 4 Compressor 5 Housing partition plate 6 Substrate storage part 6a Substrate room 6b Radiation fin chamber 7 Low heat generation board storage box 7a Flat surface part 7a1 Holding part 7a2 Side surface side extension part 7a3 Lower side extension Installation portion 7b, 7c, 7d, 7e Side surface portion 8 High heat generating substrate storage box 8a Plane portion 8a1 Holding portion 8a2 Side surface side extension portion 8b, 8c, 8d, 8e Side surface portion 8b1 Folding portion 9 Radiation fin storage box 9a Plane portion 9b , 9c, 9d, 9e Side face 10 Inverter drive circuit board 11 Control circuit board 12 Housing partition plate vent 13 Heat radiating fin 14 Low heat generating substrate storage box air vent 14a First low heat generating substrate storage box air vent 14b Second Low heat generating substrate storage box vent 15 High heat generating substrate storage box vent 16 Radiation fin storage box vent 17 Water pan 18 Louver 101 Blower chamber 102 Machine chamber 103 Wind chamber front plate 104 Blowing grill 105 Machine room front plate 106 Machine room rear plate 107 External vent hole 108 Top plate 109 Bottom plate 110 Flat plate 111 Water tray rib 112 Louver drain hole 113 Radiation fin storage box bottom 114 Flat plate notch

Claims (2)

A blower chamber provided with a fan; a machine chamber provided with a compressor; a housing partition plate that partitions the blower chamber and the machine chamber; and a substrate storage portion provided at an upper portion of the machine chamber. And the board storage portion includes a board chamber for storing a first electronic circuit board provided with electrical components, and a heat dissipation fin chamber for storing heat dissipation fins thermally connected to the first electronic circuit board. A housing partition plate that divides the substrate chamber and the radiating fin chamber, the housing partition plate includes a first ventilation hole, and the storage partition plate includes a second ventilation hole. the radiation fin chamber, said first communication with said blower chamber through the vent hole, via the second vent hole, and the then substrate chamber and communicating, the housing partition plate includes the housing unit The first electronic circuit board is held in parallel with the partition plate, and the board housing portion is provided with the first electronic circuit. A holding plate for holding the second electronic circuit board in parallel with the plate, the holding plate covering the surface of the first electronic circuit board on which the electrical component is provided and a third vent hole; The substrate chamber communicates with the machine chamber via the third vent hole, and has the first vent hole and the third vent hole at one end of the substrate accommodating portion, and the substrate accommodating portion outdoor unit of an air conditioner characterized in that it have a second vent hole at the other end of the. 2. The air conditioner according to claim 1 , wherein a water receiving tray is provided at a lower portion of the heat radiating fin chamber, and a flow path that guides water dripped from the water receiving tray to the air blowing chamber is provided. Outdoor unit.

Images