JP4859777B2 - Outdoor unit - Google Patents

Description

  The present invention divides the inside of the unit case vertically with a partition plate and divides it into a heat exchange chamber and a machine room. The heat exchange chamber contains a heat exchanger and a blower, and the machine room contains a compressor and an electrical box. It relates to the housed outdoor unit.

In the outdoor unit of the air conditioner, the inside of the unit case is partitioned vertically by a partition plate to divide it into a heat exchange chamber and a machine room, a heat exchanger and a blower are accommodated in the heat exchange room, and a compressor is placed in the machine room. There is also a box that houses an electrical box.
Generally, this type of electrical equipment box is subjected to maintenance work by removing the front panel of the outdoor unit. For this reason, for example, when the electrical box is a plate member extending substantially straight in the width direction of the machine room, if the electrical component is arranged on the front surface of the plate member, various operations from the front side to the electrical component are facilitated. The maximum width of the electrical box, that is, the projected area of the front surface is increased, and the entire outdoor unit is increased in size.
Conventionally, in the case where the front projection area of the electrical box is reduced, one end side of the electrical box is bent to the front side to form an L shape when viewed from above, and the electrical board is disposed on the front side of each flat plate part, Some of the electrical components are arranged in a narrow electrical box, and the remaining electrical components are arranged on a partition plate and arranged behind the electrical box (for example, see Patent Document 1).
JP 2005-76925 A

However, in the conventional configuration, the electrical components arranged in the space behind the electrical box cannot be directly operated by the operator from the front side of the outdoor unit, and thus the operation of removing the front side components is required. In addition, even if one end side of the electrical box is bent to the front side to have an L shape when viewed from the top side, an operator can fasten a screw to the bent portion in order to attach or detach the electrical component disposed in the bent portion, Since it was necessary to loosen the screws, it was difficult to work.
Conventionally, the electrical components of the electrical box are cooled by passing outside air into the machine room. However, if the electrical box as described above is arranged on the front side of the machine room, the cooling air in the machine room is smoothly supplied to the heat exchange room. In some cases, it may be difficult to discharge the air, and the flow of cooling air may deteriorate.

  This invention is made in view of the situation mentioned above, and provides the outdoor unit which can aim at coexistence with reduction of the front projection area of an electrical equipment box, and flowing sufficient cooling air in a machine room. is there.

  In order to solve the above-described problems, the present invention vertically partitions the unit case with a partition plate, the heat exchange chamber contains a heat exchanger and a blower, and the machine room contains an air compressor. A part of the front edge side of the partition plate is formed to be bent in a substantially square shape so as to protrude to the heat exchange chamber side, and extends from the vicinity of the outer surface of the machine room to the heat exchange chamber side, and An electrical unit support plate that is bent toward the front side of the heat exchange chamber along the shape of the shape portion, and that has an end connected to the partition plate, and the bent portion of the support plate and the partition plate A heat sink that dissipates the heat of the electrical unit supported by the electrical unit support plate is disposed in a bag-hole-like space surrounded by the square part, and the electrical unit is disposed on the square part of the partition plate. The heat sink flows through the back of the support plate The cooling air for cooling, characterized in that a can be introduced vents to the suction side of the blower of the heat exchange chamber.

According to this invention, a part of the front edge side of the partition plate is bent and formed in a substantially square shape so as to protrude to the heat exchange chamber side, and extends from the vicinity of the outer surface of the machine room to the heat exchange chamber side, An electric unit support plate is formed to be bent toward the front side of the heat exchange chamber along the shape of the square-shaped portion, and an end portion thereof is connected to the partition plate, and the bent portion of the support plate and the partition A heat sink that releases heat of the electrical unit supported by the electrical unit support plate is disposed in a bag-hole-like space surrounded by the square shape of the plate, and the square shape of the partition plate A ventilation hole that allows the cooling air to flow through the back of the electrical unit support plate and cool the heat sink to the negative pressure side of the blower in the heat exchange chamber is provided, so that the cooling air flows smoothly into the heat exchange chamber. Enough cooling air to flow through the machine room
In addition, since the electrical unit support plate extends from the vicinity of the outer surface of the machine room to the heat exchange chamber side and is bent toward the front side of the heat exchange chamber along the shape of the square-shaped part of the partition plate, Compared to the case where a straight flat plate is applied to the unit support plate, the front projection area of the electrical box can be reduced, and the electrical unit support plate has an L-shape when viewed from the top side with one end folded to the front side. Compared to the applied one, both the first electrical unit and the second electrical unit can be arranged facing the front, and it is possible to easily perform these maintenance operations. Therefore, it is possible to achieve both reduction of the front projection area of the electrical equipment box and sufficient cooling air to flow through the machine room.

  The said structure WHEREIN: It is preferable that the said ventilation hole is formed in the hole which cuts and raises a part of the square-shaped part of the said partition plate to the said heat exchange chamber side, and opens toward the back side of the said air blower. According to this structure, the ventilation hole opened to the back side of the air blower which is an area | region where the negative pressure of an air blower is strong can be provided easily, and the cooling air which cools a heat sink can be smoothly flowed in a heat exchange chamber. it can.

  Moreover, in the said structure, it is preferable to provide the ventilation path between the top plate of the said unit case, and the said electrical equipment unit support plate by making the upper edge of the said electrical equipment unit support plate lower than the upper edge of the said partition plate. According to this configuration, the cooling air on the front side of the electrical unit support plate can be passed over the electrical unit support plate to the back side and merged with the cooling air flowing on the back side of the electrical unit support plate, to the heat sink It can be introduced smoothly.

  In the above configuration, the electrical unit cooled by the heat sink is disposed on the front surface of the bent portion of the electrical unit support plate, and the other electrical unit is disposed on the front surface of the portion other than the bent portion of the electrical unit support plate. It is preferable to do. According to this structure, the maintenance operation of these electrical units can be easily performed from the front side of the outdoor unit, and the heat of the electrical units can be quickly radiated by the heat sink.

  The present invention is formed by bending a part of the front edge side of the partition plate into a substantially square shape so as to protrude toward the heat exchange chamber side, and extending from the vicinity of the outer side surface of the machine room to the heat exchange chamber side. An electrical unit support plate that is bent toward the front side of the heat exchange chamber along the shape of the shape portion, and that has an end connected to the partition plate, and the bent portion of the support plate and the partition plate A heat sink that dissipates the heat of the electrical unit supported by the electrical unit support plate is disposed in a bag-hole-like space surrounded by the square part, and the electrical unit is disposed on the square part of the partition plate. Since the cooling air that flows through the back surface of the support plate and cools the heat sink is provided on the negative pressure side of the blower in the heat exchange chamber, the front projection area of the electrical box is reduced. Make sure that the cooling air flows into the heat exchange chamber and It is possible to flow the cooling air.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The air conditioner according to this embodiment includes an outdoor unit 10 and an indoor unit (not shown), and performs a cooling operation and a heating operation by flowing a refrigerant through a refrigerant circuit connected by a refrigerant pipe. The outdoor unit 10 is installed outside, exchanges heat with outdoor air, condenses the refrigerant during the cooling operation and releases heat to the outside air, and evaporates the refrigerant during the heating operation and takes in heat from the outside air. In addition, the directions such as up and down and left and right described below indicate directions when the outdoor unit 10 is viewed from the front side in a state where the outdoor unit 10 is installed.

  FIG. 1 is a view of the outdoor unit 10 as viewed from the front, and FIG. 2 is a view of the outdoor unit 10 as viewed from above. The outdoor unit 10 includes a unit case (housing) 11 having a substantially rectangular parallelepiped box shape. The unit case 11 includes a bottom plate 12, a top plate (not shown), a front panel 13, and an outer plate 14, and includes a unit case. 11 is partitioned vertically by a partition plate 15 extending vertically, and is divided into a heat exchange chamber R1 and a machine chamber R2. In the example of FIG. 1, the top plate, the front panel 13 and the outer plate 14 are removed, but the front panel 13 is divided into a first front panel 13 </ b> A that is divided into left and right with a partition plate 15 as a boundary. And the second front panel 13B. By removing each of the front panels 13A and 13B, an operator can perform maintenance work on the components in the heat exchange chamber R1 and the machine room R2 from the front side.

  As shown in FIG. 2, the heat exchange chamber R <b> 1 contains a heat exchanger 21 on the back side and a blower 22 on the front side. More specifically, the heat exchanger 21 is formed by being bent into a substantially L shape when viewed from above, and is disposed along the back surface from the left side surface (outer side surface) of the heat exchange chamber R1. The entire exposed surface is covered with a finger (not shown) made of a net or the like that can prevent a human body or the like from contacting the heat exchanger 21 while securing a ventilation path (suction port).

The blower 22 includes a fan motor 26 fixed to a pair of left and right posts 24L and 24R in the heat exchange chamber R1 via a pedestal 25, and a propeller fan (axial fan) 27 attached to the shaft of the fan motor 26. The propeller fan 27 is arranged close to the front side of the heat exchange chamber R1. Further, the front portion of the propeller fan 27 enters a round flange-shaped fan cover portion 28 provided on the front panel of the heat exchange chamber R1, and the opening portion of the fan cover portion 28 is a ventilation path (blower). The opening is covered with a fan guard 29 that prevents the propeller fan 27 from contacting a human body or the like.
When the propeller fan 27 is rotationally driven by the fan motor 26, outside air is sucked into the heat exchange chamber R1 from the periphery of the outdoor unit 10, more specifically from the back side and the left side of the heat exchanger 21, and heat is generated. After passing through the substantially front surface of the exchanger 21, it is discharged outside through the fan cover portion 28 on the front surface of the heat exchange chamber R1. That is, the outdoor unit 10 is configured as a front blowing type that blows out air after heat exchange from the front.

3 is a view showing a longitudinal section of the machine room R2 of the outdoor unit 10, and FIG. 4 is a view of the machine room R2 as viewed from above. As shown in FIGS. 1, 3, and 4, in the machine room R <b> 2, refrigerant circuit components such as a compressor 31, an accumulator 32, and a valve body such as a switching valve and a condensation valve that constitute a part of the refrigerant circuit are piped. It is connected and accommodated in a substantially lower space of the machine room R2. One end side of the pipe in the machine room R2 is connected to the indoor unit via the heat exchanger 21, and the other end side of the pipe is connected to the indoor unit, thereby forming a refrigerant circuit for circulating the refrigerant. Is done.
An electrical box 40 in which various electrical units (electrical components) 50 such as a control board for controlling the air conditioner are disposed is disposed in the upper space of the machine room R2. The electrical box 40 has an electrical unit support plate 41 extending in the width direction of the machine room R2 on the front side of the machine room R2, and an electrical unit 50 such as a substrate is disposed on the electrical unit support plate 41. Yes.

Next, the electrical box 40 will be described in detail. FIG. 5 is a perspective view of the electrical equipment box 40 as well as its peripheral configuration as seen from the substantially front side of the outdoor unit 10, and FIG. 6A is a perspective view of the electrical unit box 40 as seen from the substantially back side. B) is a perspective view seen from the machine room R2 side.
As shown in FIG. 4, the electrical box 40 includes an electrical unit support plate 41 disposed on the front side of the machine room R2 and extending in the width direction of the machine room R2. The electrical unit support plate 41 includes As shown in FIG. 5 and FIGS. 6A and 6B, a plurality of electrical units 50 are fixed with screws. Here, in this embodiment, as shown in FIG. 1, the partition plate 15 that partitions the machine room R2 and the heat exchange chamber R1 is divided into an upper part and a lower part of the partition plate 15B. As shown in FIG. 5, the electrical unit support plate 41 is connected to the upper partition plate 15A. Therefore, the electrical unit support plate 41 and the upper partition plate 15A are detachable as an integral unit.
The electrical unit support plate 41 is attached so that its upper edge is one step lower than the upper edge of the upper partition plate 15A, and air ( A ventilation path for circulating cooling air is formed.

7 is a three-side view of the electrical unit support plate 41, FIG. 7 (A) is a plan view, FIG. 7 (B) is a top view, and FIG. 7 (C) is a left side view. The electrical unit support plate 41 is formed by performing sheet metal processing such as bending on a single metal plate, and generally has a substantially rectangular shape with the widest area allocated as shown in FIG. Plate portion 42, a vertically long inclined plate portion (bent portion) 43 bent from a side edge (left side edge in FIG. 7) 42X of the plate portion 42, and a horizontally long shape extending downward from a lower edge 42Y of the plate portion 42. A lower plate portion (lower bent portion) 44 is integrally provided. In this embodiment, the electrical unit support plate 41 is formed by bending a single metal plate. However, the present invention is not limited thereto, and a rigid plate material such as a single resin plate is molded into the above-described shape. The electrical unit support plate 41 may be formed.
The maximum width W1 of the electrical unit support plate 41, that is, the combined width W1 of the plate portion 42 and the inclined plate portion 43 is formed to a length that falls within the width of the machine room R2, and more specifically, FIG. As shown in FIG. 2, on the front side of the machine room R2, the distance substantially coincides with the distance W0 from the vicinity of the outer surface (right side) of the machine room R2 to the upper partition plate 15A.

When the electrical unit support plate 41 is disposed in the machine room R2, as shown in FIG. 4, the plate part 42 is located on the outer side surface of the machine room R2 in the front side space of the machine room R2 when viewed from above. (Right side) It is arrange | positioned so that it may extend in the heat exchange chamber R1 side along the front surface of machine room R2 from the near side, The said inclination board part 43 inclines toward the front side of heat exchange chamber R1, and the front surface is machine. It arrange | positions toward the front side of chamber R2. Thereby, the entire front surface of the electrical unit support plate 41 can be directed to the front surface side of the outdoor unit 10.
On the front surfaces of the plate portion 42 and the inclined plate portion 43, an electrical unit 50 that is considered to have a relatively high maintenance frequency, such as a state check operation and a component attachment / detachment operation, is arranged. Specifically, as shown in FIG. In addition, a first electrical board 51 constituting the first electrical unit is disposed on the front surface of the plate part 42, and a second electrical board 52 and a bridge diode constituting the second electrical unit are disposed on the front surface of the inclined plate part 43. A heat generating component 53 such as is arranged.

  These electrical boards 51 and 52 are boards on which various electrical units for performing operation and operation control of each part of the air conditioner are mounted. Among these, the first electrical board 51 is an electrical component with a relatively small amount of heat generation. The second electrical board 52 is a board on which electrical components such as an inverter circuit that generate a relatively large amount of heat are mounted. That is, the second electrical board 52 is a board that generates more heat than the first electrical board 51, and requires cooling using the heat sink 60 described later.

Here, as shown in FIG. 5, the plate portion 42 is substantially the same size as the first electrical component substrate 51, and its size (narrower width) is ensured while securing the arrangement area of the components arranged on the plate portion 42. ). Further, as shown in FIGS. 7A to 7C, the plate portion 42 is provided with two bent portions 42A and 42B which are partially bent at the back side substantially horizontally, and these bent portions are provided. As shown in FIG. 5A, electrical units 55 and 56 such as power relays and capacitors are fixed to the portions 42A and 42B. Thus, by forming a mounting base for the electrical units 55 and 56 by bending a part of the plate portion 42 to the back side, the number of parts can be reduced as compared with the case where the mounting base is provided as a separate member. it can.
The end portion 42Z of the plate portion 42 on the outer surface side of the machine room R2 is bent in a substantially U shape when viewed from above to improve the rigidity of the plate portion 42, and at the back side of the U portion. A claw portion 42T is integrally formed by cutting out a part, and this claw portion 42T functions as a hooking portion for hooking the electrical box 40 to the unit case 11.

Since the inclined plate portion (bending portion) 43 is inclined toward the front side of the heat exchange chamber R1, as described above, the second electrical component disposed on the front surface of the inclined plate portion 43 from the front side of the machine room R2. An operator can easily maintain the unit (the second electrical component substrate 52 and the heat generating component 53).
The second electrical unit is an electrical unit that cools by the heat sink 60. As shown in FIG. 6A, the heat sink 60 is disposed in close contact with the back surface of the inclined plate portion 43. This heat sink 60 has a configuration in which metal plates constituting a plurality of fins are arranged at intervals in the vertical direction, and uses screw holes 43A formed in the vicinity of the four corners of the inclined plate portion 43. As shown in FIG. 5, the inclined plate portion 43 is fixed from the front side of the inclined plate portion 43 with screws 43 </ b> B and extends up and down on the rear surface of the inclined plate portion 43.

  Further, as shown in FIGS. 5 and 7C, the lower plate portion 44 extends forward from the lower edge 42Y of the plate portion 42 substantially horizontally and then bends obliquely downward and goes downward. It is formed in the inclination board which approaches the front side of machine room R2. Due to this inclination, as shown in FIGS. 1 and 3, the lower plate portion 44 extends into the space between the refrigerant circuit components (such as piping) disposed in the machine room R2 and the front surface of the machine room R2. In addition, a sufficient space for arranging the components can be secured. As shown in FIG. 3, the lower plate portion 44 is provided with a wiring connection part 57 such as a terminal base, a wiring connection portion 58 for connecting a substrate ground wire and a terminal ground wire, and the like on the front surface thereof. Thereby, it is comprised so that wiring connection operation | work etc. can be performed easily from the front side of machine room R2.

8A and 8B are four views of the upper partition plate 15A, FIG. 8A is a plan view, FIG. 8B is a top view, FIG. 8C is a front view, and FIG. ) Is a rear view. In FIG. 8B, the front side of the outdoor unit 10 is indicated as “FRONT”, the back side as “REAR”, the heat exchange chamber R1 side as “R1”, and the machine room R2 side as “R2”.
Similarly to the electrical unit support plate 41, the upper partition plate 15A is formed by subjecting a single metal plate to sheet metal processing such as bending. As shown in FIG. 8B, the upper partition plate 15A extends in the front-rear direction of the outdoor unit 10 as viewed from above, and has a substantially rectangular shape so that a part of the front edge protrudes toward the heat exchange chamber R1. A partition plate rear portion 15A1 that is bent in a shape and extends in order from the back side to the front side along the front-rear direction of the outdoor unit 10, and a partition plate inclined portion that inclines from the front end of the partition plate rear portion 15A1 toward the heat exchange chamber R1. 15A2, a partition plate bending portion 15A3 that bends substantially vertically from the front end of the partition plate inclined portion 15A2 toward the front surface side, and the outdoor unit 10 along the front-rear direction of the outdoor unit 10 from the front end of the partition plate bending portion 15A3. A partition plate front portion 15A4 that extends to the front surface of the (unit case 11) and then bends vertically along the front surface is integrally provided.

  As shown in FIG. 4, when the upper partition plate 15A is disposed in the unit case 11, the rear end (the rear end of the partition plate rear portion 15A1) is located in the vicinity of the heat exchanger 21, and the front end (the front of the partition plate) The front end of the portion 15A4 is attached in the vicinity of the front surface of the unit case 11, and a square-shaped portion that protrudes in a substantially square shape toward the heat exchange chamber R1 by the partition plate inclined portion 15A2 and the partition plate bent portion 15A3. 16 is formed. The partition plate rear portion 15A1 located on the back side of the outdoor unit 10 with respect to the character-shaped portion 16 is provided with electrical equipment such as a plurality of reactors on the surface on the machine room R2 side as shown in FIG. A unit 59 is arranged.

  Further, the above-described electrical unit support plate 41 is connected so as to be substantially in contact with the boundary between the partition plate bending portion 15A3 and the partition plate front portion 15A4 in the upper partition plate 15A, that is, the front end portion of the character-shaped portion 16. In this state, the inclination angle of the partition plate inclined portion 15A2 in the upper partition plate 15A is set so as to substantially follow the inclination of the inclined plate portion 43 of the electrical unit support plate 41.

With this configuration, the inclined plate portion 43 of the electrical unit support plate 41, the partition plate inclined portion 15A2 of the upper partition plate 15A, and the partition plate bent portion 15A3 perform heat exchange from substantially the center of the machine room R2 in top view. A bag hole-shaped space SP extending in an oblique direction toward the front surface side (blower 22 side) of the chamber R1 is formed, and the heat sink 60 attached to the back surface of the inclined plate portion 43 is accommodated in the space SP. .
The bottom of the space SP is provided with a bottom plate 15A5 formed by being bent below the partition plate inclined portion 15A2 or the partition plate bending portion 15A3, and functions as a mounting base for the heat sink 60. Further, as shown in FIG. 8C and FIG. 6B, a chamfered portion 15A6 is formed at the lower end of the partition plate bent portion 15A3, and the chamfered portion 15A6 interferes with the blower 22 (propeller fan 27). In order to avoid this, the partition plate 15 can be disposed close to the blower 22.

The heat sink 60 cools the second electrical unit (the second electrical component substrate 52 and the heat generating component 53) by increasing the heat radiation area with the plurality of fins described above and radiating heat into the air with the fins.
In the present embodiment, the ventilation holes 70 and 71 through which the cooling air for cooling the heat sink 60 is passed are cut into a part of the partition plate inclined portion 15A2 and the partition plate bent portion 15A3 of the upper partition plate 15A to the heat exchange chamber R1 side. The cooling air that has been raised is introduced and the cooling air that has passed through the heat sink 60 through the ventilation holes 70 and 71 is introduced into the heat exchange chamber R1.

More specifically, as shown in FIGS. 8A, 8B, and 8D, the partition plate inclined portion 15A2 is formed with substantially U-shaped cuts 80 spaced apart from each other. By bending the enclosed portion 81 toward the heat exchange chamber R1, a pair of upper and lower vertically ventilating holes 70 communicating with the heat exchange chamber R1 are formed.
In this case, as shown in FIG. 8B, the inclination angle (bending angle) of the portion 81 surrounded by each of the notches 80 is an angle θ1, and the inclination angle (bending angle) of the partition plate inclined portion 15A2 with respect to the partition plate rear portion 15A1. ) When θ2 is set, when the angle range on the outlet side of the vent hole 70 is represented by an angle θx with respect to the plane F parallel to the front surface of the outdoor unit 10, the outlet side angle θx is (180 degrees −θ2) to (180 degrees − It can be expressed as a range of θ2 + θ1).

  In the present embodiment, the ventilation hole 70 is formed so as to face the negative pressure side (also referred to as the suction side) of the blower 22 in the heat exchange chamber R1 by adjusting the angle θ1 described above. Here, the negative pressure side of the blower 22 is a region where a strong negative pressure is generated that can sufficiently suck air in the machine room R2, and corresponds to the back side of the blower 22 (propeller fan 27). In this configuration, since the negative pressure side of the blower 22 is present on the rear side of the outdoor unit 10 with respect to the partition plate inclined portion 15A2, by setting the inclination angle θ2 to 130 degrees and the angle θ1 to 30 degrees, the outlet side The angle θx is in the range of (180 degrees−θ2 = 50 degrees) to (180 degrees−θ2 + θ1 = 80 degrees).

Further, as shown in FIGS. 8 (A), (B), and (C), a substantially U-shaped cut 85 is also formed in the partition plate bent portion 15A3 with a space in the vertical direction, and is surrounded by the cuts 85. By bending the portion 86 toward the heat exchange chamber R1, a pair of upper and lower vertical ventilation holes 71 communicating with the heat exchange chamber R1 are formed in two rows.
These ventilation holes 71 are also formed so as to face the negative pressure side (suction side) of the blower 22 in the heat exchange chamber R <b> 1, similarly to the ventilation holes 70. That is, since the negative pressure side of the blower 22 exists on the back side of the outdoor unit 10 with respect to the partition plate bending portion 15A3, when the inclination angle (bending angle) of the portion 86 surrounded by each of the cuts 85 is an angle θ1 ′, When the angle range on the outlet side of the ventilation hole 71 is indicated by an angle θx with respect to the plane F parallel to the front surface of the outdoor unit 10, the outlet side angle θx of the ventilation hole 71 can be expressed as a range of θ2− (θ2 + θ1 ′). it can. In this configuration, by setting the angle θ1 ′ to 30 degrees (the angle θ2 is 130 degrees), the outlet side angle θx is in the range of (θ2 = 130 degrees) to (θ2 + θ1 = 160 degrees).

Thus, in this embodiment, since the ventilation holes 70 and 71 were formed so that it might face the negative pressure side of the air blower 22 of the heat exchange chamber R1, the cooling air which cools the heat sink 60 was fully drawn in to the heat exchange chamber R1. It becomes possible. Further, since the ventilation holes 70 and 71 are formed on the end portion side of the heat sink 60 on the heat exchange chamber R1 side, the cooling air for cooling the heat sink 60 is distributed to the end portion of the heat sink 60 on the heat exchange chamber R1 side. The cooling air can be allowed to flow over the entire surface of the heat sink 60 to allow sufficient cooling, and a sufficient opening area of the entire ventilation holes 70 and 71 can be secured. Further, as shown in FIG. 4, since the front side of the propeller fan 27 is covered with the fan cover portion 28, almost no negative pressure is generated around the fan cover portion 28, but the ventilation holes 70 and 71 are provided on the fan cover portion 28. Since it faces toward the opposite side, it is possible to reliably introduce the cooling air to the negative pressure side in the heat exchange chamber R1 while avoiding the periphery of the fan cover portion 28.
Furthermore, since these ventilation holes 70 and 71 are formed by cutting and raising a part of the partition plate 15 (upper partition plate 15A), they can be easily provided without using separate parts.

Next, the flow of cooling air that cools the inside of the machine room R2 will be described. In the machine room R2 of the outdoor unit 10 of this configuration, as shown in FIG. 3, a ventilation hole 75 is provided respectively on the lower side on the outer side (right side) side of the front surface and on the lower side on the outer side surface (right side surface) side of the rear surface. , 76 are formed.
For this reason, as shown by solid line arrows in FIG. 3 and FIG. 4, the flow of the cooling air (outside air), while the blower 22 is rotating, the ventilation holes 75 and 76 provided in front of and behind the machine room R2 due to the negative pressure of the blower 22. Functions as an outside air introduction port, and outside air is introduced into the machine room R2 through the ventilation holes 75 and 76. Since this outside air, that is, the cooling air is introduced from the lower side of the machine room R2, it flows upward around the refrigerant circuit components such as the compressor 31 to air-cool these components, and then the electric unit support plate 41 is used as a boundary. And flows upward on the front side and the back side.

  Of this cooling air, the cooling air flowing on the front side of the electrical unit support plate 41 cools the first electrical unit on the front side of the electrical unit support plate 41 and then flows over the electrical unit support plate 41 to the back side thereof. It is guided to the heat sink 60 along the back surface of the unit support plate 41. In addition, the cooling air flowing on the back side of the electrical unit support plate flows along the back side of the electrical unit support plate 41 and the surface of the partition plate 15 on the machine room R2 side and is guided to the heat sink 60. Thereby, the cooling air in the machine room R2 smoothly flows into the heat sink 60 without greatly bending the flow by the electrical unit support plate 41 and the partition plate 15. Then, the cooling air flowing through the heat sink 60 flows to the negative pressure side of the blower 22 in the heat exchange chamber R1 through the ventilation holes 70 and 71 of the upper partition plate 15A, and to the outside through the opening of the fan cover 28. Discharged. Thereby, various components in the machine room R2 can be cooled.

  As described above, in the present embodiment, the square-shaped portion 16 protruding toward the heat exchange chamber R1 is formed on a part of the front edge side of the partition plate 15, and the electrical unit support plate 41 is attached to the machine room R2. An inclined plate portion (bending portion) 43 is formed from the vicinity of the outer side surface toward the heat exchange chamber R1 and along the shape of the rectangular portion 16 toward the front surface side of the heat exchange chamber R1, and this electrical unit support plate 41 The heat sink 60 is disposed in a bag-hole-shaped space SP surrounded by the inclined plate portion 43 and the square-shaped portion 16 of the partition plate 15, and the back surface of the electrical unit support plate 41 is placed on the square-shaped portion 16. Since the ventilation holes 70 and 71 for introducing the cooling air that flows and cools the heat sink 60 to the negative pressure side of the blower 22 are provided, the cooling air can surely flow into the heat exchange chamber R1 and is sufficiently in the machine chamber R2. A cool cooling air.

  Moreover, since the 2nd electrical equipment unit cooled by the heat sink 60 is arrange | positioned in the inclination board part 43 of the electrical equipment unit support plate 41, a heat transfer path | route is short and the heat of the 2nd electrical equipment unit can be quickly radiated with the heat sink 60. . In addition, in the configuration of the present application, the front projection area of the electrical box 40 can be reduced as compared with a case where a straight flat plate is applied to the electrical unit support plate 41, and one end side of the electrical unit support plate 41 is placed on the front side. The first electrical unit and the second electrical unit are exposed to the front as compared with the case of applying an L-shape when viewed from the top, and the maintenance work can be easily performed.

Moreover, in this structure, since the partition plate 15 and the electrical equipment unit support plate 41 are each formed by bending a single plate member, the partition plate 15 and the electrical equipment unit support plate 41 can be easily created, and a plurality of members The number of parts can be reduced as compared with the case where the partition member and the electrical unit support member are formed by connecting the two.
Therefore, it is possible to achieve both the reduction of the front projection area of the electrical box 40 and the flow of sufficient cooling air to the machine room R2, and the creation of component parts and the reduction of the number of parts. .

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change implementation is possible. For example, the first electrical unit and the second electrical unit disposed in the electrical box 40 are not limited to the electrical unit described above, and can be changed as appropriate. In addition, the space on the back side of the electrical unit support plate 41 of the electrical box 40 may be used as a layout space for other electrical units, or as a layout space for refrigerant circuit components such as piping. You may change the layout of components suitably. The electrical unit support plate 41 only needs to form at least the plate portion 42 and the inclined plate portion 43, and the lower plate portion 44 may be omitted when necessary electrical units can be disposed. Moreover, it is applicable not only to the outdoor unit in which one fan 22 is arranged, but also to an outdoor unit in which a plurality of fans 22 are arranged.

It is the figure which looked at the outdoor unit which concerns on this embodiment from the front. It is the figure which looked at the outdoor unit from the upper part. It is a figure which shows the longitudinal cross-section of the machine room of an outdoor unit. It is the figure which looked at the machine room from the upper surface. It is the perspective view which looked at the electrical equipment box from the substantially front side of the outdoor unit together with its peripheral configuration. (A) is the perspective view which looked at the electrical equipment box from the substantially back side of the outdoor unit with the peripheral composition, and (B) is the perspective view seen from the machine room side. (A) is a top view of an electrical equipment unit support plate, (B) is a top view, and (C) is a left side view. (A) is a top view of an upper partition plate, (B) is a top view, (C) is a front view, and (D) is a rear view.

Explanation of symbols

10 Outdoor unit 11 Unit case (housing)
15 Partition plate 15A Upper partition plate 15A1 Partition plate rear portion 15A2 Partition plate inclined portion (bending portion)
15A3 Partition plate bending portion 15A4 Partition plate front portion 15B Lower partition plate 16 Character-shaped portion 16
21 Heat Exchanger 22 Blower 26 Fan Motor 27 Propeller Fan (Axial Fan)
28 Fan cover 31 Compressor 40 Electrical box 41 Electrical unit support plate 42 Plate part 43 Inclined plate part 44 Lower plate part 50, 55, 56, 59 Electrical unit 51 First electrical board 52 Second electrical board 53 Heating component 57 Wiring Connection part 58 Wiring connection part 60 Heat sink 70, 71 Ventilation hole R1 Heat exchange room R2 Machine room

Claims (4)

In the outdoor unit in which the inside of the unit case is vertically partitioned by a partition plate, the heat exchanger contains a heat exchanger and a blower, and the machine room contains a compressor.
A part of the front edge side of the partition plate is formed to be bent in a substantially square shape so as to protrude to the heat exchange chamber side, and extends from the vicinity of the outer surface of the machine room to the heat exchange chamber side, and An electrical unit support plate that is bent toward the front side of the heat exchange chamber along the shape of the shape portion, and that has an end connected to the partition plate, and the bent portion of the support plate and the partition plate A heat sink that dissipates the heat of the electrical unit supported by the electrical unit support plate is disposed in a bag-hole-like space surrounded by the square part, and the electrical unit is disposed on the square part of the partition plate. An outdoor unit provided with a ventilation hole through which a cooling air that flows through the back surface of a support plate and cools the heat sink can be introduced to the negative pressure side of the blower in the heat exchange chamber. In the outdoor unit according to claim 1,
The outdoor unit, wherein the ventilation hole is formed in a hole that is cut and raised to a side of the heat exchange chamber and opens toward a rear side of the blower. The outdoor unit according to claim 1 or 2,
An outdoor unit characterized in that the upper edge of the electrical unit support plate is made lower than the upper edge of the partition plate and an air passage is provided between the top plate of the unit case and the electrical unit support plate. The outdoor unit according to claim 1 or 2,
An electrical unit that is cooled by the heat sink is disposed in front of a bent portion of the electrical unit support plate, and another electrical unit is disposed in front of a portion other than the bent portion of the electrical unit support plate. Outdoor unit.

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