JP2014092314A - Outdoor unit for air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outdoor unit for an air conditioning system, for allowing easy work for wiring to a terminal board and improving the degree of freedom of wire routing from the terminal board.SOLUTION: An outdoor unit for an air conditioning system includes: a casing; and a compressor; and an electric component box stored in the casing. A terminal board is provided on the electric component box. A compressor driving board 42 including a heating member to be cooled by cooling medium is arranged on the lower part of the internal of the electric component box, at a position receding behind an electric wiring connection part of the terminal board to which an electric wiring is connected. On the side face of the electric component box below the electric wiring connection part of the terminal board, cutouts 73A, 74A are formed in the shape of backing from the front face of the electric component box.

Description

  The present invention relates to an outdoor unit for an air conditioner. More specifically, the present invention relates to an outdoor unit of an air conditioner in which an electrical component box is disposed in a casing.

  In the casing of the outdoor unit of the air conditioner, an electrical component box that houses a drive board of the compressor, a terminal block for connecting power supply wiring in the field, and the like is disposed.

  A power module having a power element (switching element) such as an IGBT is mounted on the drive board of the compressor. Since such a power element is a highly heat-generating component, conventionally, the power module is cooled by using a cooling refrigerant pipe routed from the cooling pipe of the refrigerant circuit. Specifically, the cooling refrigerant pipe is brought into contact with one surface of a plate-like cooling jacket, and the power module is brought into contact with a heat sink disposed so as to contact the other surface of the cooling jacket. The power module is cooled by the refrigerant flowing in the refrigerant pipe.

  The cooling refrigerant pipe contacting the cooling jacket is preferably a startup pipe from the point of view that piping work is easy, and therefore the drive board of the compressor is disposed below the electrical component box. Often done.

  Further, when the cooling refrigerant pipe comes into contact with the electrical component box or the casing of the outdoor unit (when the electrical component box wall surface on the front side of the cooling refrigerant pipe is omitted), there is a risk of generating abnormal noise such as a chatter noise. Further, since it is necessary to secure a space for the cooling refrigerant pipe and the cooling jacket, the drive board of the compressor is retracted to the inner side than the terminal block disposed near the wall surface of the casing. Arranged in position.

  And the casing of the conventional electrical component box has a shape that covers the front and side surfaces of these terminal block, cooling refrigerant piping, cooling jacket, and the like.

  However, the side surface or side wall of the casing below the terminal block makes it difficult to perform wiring work to the terminal block and connection work between the cooling refrigerant pipe and the cooling jacket, and also the direction of wiring from the terminal block. Restricted downward.

  The present invention has been made in view of such circumstances, and is an air conditioning apparatus that facilitates work such as wiring to a terminal block and can improve the degree of freedom of wiring from the terminal block. The purpose is to provide outdoor units.

(1) The outdoor unit of the air conditioner of the present invention includes a casing,
A compressor and an electrical component box housed in the casing, and
A terminal block is provided in the electrical component box,
The drive board for the compressor including the heat generating member cooled by the refrigerant is at a position retracted rearward from the electrical wiring connection portion to which the electrical wiring in the terminal block is connected, and is a lower part in the electrical component box Are arranged in the
A notch having a shape retreating from the front surface of the electrical component box is formed on the side surface of the electrical component box below the electrical wiring connection portion of the terminal block.

  In the outdoor unit of the air conditioner of the present invention, since the cutout of the shape retreating from the front surface of the electrical component box is formed on the side surface of the electrical component box below the electrical wiring connection portion of the terminal block, A side approach is also possible, making it easier to connect the power supply wiring to the terminal block and connect the cooling refrigerant pipe to the cooling jacket. In addition, the direction in which the wiring is routed from the terminal block is not limited downward, and it is possible to route the wiring from the side, so that the degree of freedom of wiring from the terminal block can be improved.

(2) In the outdoor unit of the air conditioner according to (1), the refrigerant pipe for cooling the refrigerant and the refrigerant jacket may be disposed at a position retracted rearward from the electric wiring connection portion. In this case, the medium pipe and the refrigerant jacket do not obstruct the connection work of the power supply wiring to the terminal block at the site.

(3) In the outdoor unit of the air conditioner of (2), the cutout may have a shape that retreats to a support plate that supports the drive substrate and the refrigerant jacket. In this case, a larger notch can be formed while securing the drive substrate and the refrigerant jacket.

(4) In the outdoor unit of the air conditioner according to (2) or (3), the drive board is disposed below the terminal block, and the refrigerant pipe is connected to the electrical component from below the electrical component box. It is preferable to extend outside the box. In this case, the size of the electrical component box can be reduced by reducing the size in the width direction of the electrical component box. Further, the power supply wiring can be easily released in the lateral direction.

  According to the outdoor unit of the air conditioning apparatus of the present invention, it is possible to facilitate the work such as wiring to the terminal block, and to improve the degree of freedom of wiring from the terminal block.

It is a schematic diagram which shows the refrigerant circuit of the air conditioning apparatus which has the outdoor unit which concerns on one embodiment of this invention. It is a perspective view which shows the external appearance of an outdoor unit. It is a schematic perspective view which shows the state which removed the side panel and top plate of the outdoor unit. It is a schematic front view which shows the state which removed the side panel and top plate of the outdoor unit. It is a top view of the outdoor unit which removed the top plate. It is a top view inside an outdoor unit. It is a front view of the electrical component box of the state which removed the front side wall. It is the disassembled perspective view of the electrical component box seen from the front diagonal upper direction in the state which removed the front side wall. It is the perspective view of the electrical component box seen from back diagonally upward. FIG. 8 is a schematic cross-sectional view of an electrical component box corresponding to the position indicated by arrows XX in FIG. 7. FIG. 8 is a schematic cross-sectional view of the electrical component box corresponding to the position indicated by the arrow XI-XI in FIG. 7. FIG. 8 is a schematic cross-sectional view of the electrical component box corresponding to the XII-XII arrow position in FIG. 7. FIG. 8 is a schematic cross-sectional view of the electrical component box corresponding to the XIII-XIII arrow position in FIG. 7. It is a sectional side view of the lower part of an electrical component box. It is a sectional side view which shows the discharge port for discharging | emitting the air in an electrical component box. It is explanatory drawing which shows the flow of the air inside an outdoor unit.

Drawing 1 is a mimetic diagram showing the refrigerant circuit of the air harmony device which has the outdoor unit concerning the 1 embodiment of the present invention.
The air conditioner 1 is a multi-type air conditioner for buildings, for example, and is a refrigerant circuit so that a plurality of indoor units 3 are connected in parallel to one or a plurality of outdoor units 2 and refrigerant can flow. 10 is formed.

  The outdoor unit 2 includes a compressor 11, a four-way switching valve 12, an outdoor heat exchanger 13, an outdoor expansion valve 14, an accumulator 20, an oil separator 21, and the like, which are connected by a refrigerant pipe. The outdoor unit 2 is provided with a blower fan 23. The indoor unit 3 is provided with an indoor expansion valve 15, an indoor heat exchanger 16, and the like. The four-way switching valve 12 and the indoor heat exchanger 16 are connected by a gas side refrigerant communication pipe 17a, and the outdoor expansion valve 14 and the indoor expansion valve 15 are connected by a liquid side refrigerant communication pipe 17b. A gas side shut-off valve 18 and a liquid side shut-off valve 19 are provided at a terminal portion of the internal refrigerant circuit of the outdoor unit 2. The gas side closing valve 18 is arranged on the four-way switching valve 12 side, and the liquid side closing valve 19 is arranged on the outdoor expansion valve 14 side. A gas side refrigerant communication pipe 17 a is connected to the gas side shutoff valve 18, and a liquid side refrigerant communication pipe 17 b is connected to the liquid side shutoff valve 19.

  In the air conditioner 1 having the above-described configuration, when the cooling operation is performed, the four-way switching valve 12 is held in a state indicated by a solid line in FIG. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 11 flows into the outdoor heat exchanger 13 through the oil separator 21 and the four-way switching valve 12, and is condensed by exchanging heat with outdoor air by the operation of the blower fan 23. Liquefaction. The liquefied refrigerant passes through the fully-expanded outdoor expansion valve 14 and flows into each indoor unit 3 through the liquid side refrigerant communication pipe 17b. In the indoor unit 3, the refrigerant is decompressed to a predetermined low pressure by the indoor expansion valve 15, and further evaporates by exchanging heat with indoor air in the indoor heat exchanger 16. The room air cooled by the evaporation of the refrigerant is blown into the room by an indoor fan (not shown) to cool the room. The refrigerant evaporated and vaporized in the indoor heat exchanger 16 returns to the outdoor unit 2 through the gas side refrigerant communication pipe 17a, and is sucked into the compressor 11 through the four-way switching valve 12 and the accumulator 20.

  On the other hand, when the heating operation is performed, the four-way switching valve 12 is held in a state indicated by a broken line in FIG. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 11 flows into the indoor heat exchanger 16 of each indoor unit 3 through the oil separator 21 and the four-way switching valve 12, and condenses and liquefies by exchanging heat with indoor air. To do. The indoor air heated by the condensation of the refrigerant is blown into the room by an indoor fan to heat the room. The refrigerant liquefied in the indoor heat exchanger 16 returns from the fully opened indoor expansion valve 15 to the outdoor unit 2 through the liquid side refrigerant communication pipe 17b. The refrigerant that has returned to the outdoor unit 2 is decompressed to a predetermined low pressure by the outdoor expansion valve 14, and further evaporates by exchanging heat with outdoor air in the outdoor heat exchanger 13. The refrigerant evaporated and vaporized in the outdoor heat exchanger 13 is sucked into the compressor 11 through the four-way switching valve 12 and the accumulator 20.

FIG. 2 is a perspective view showing the appearance of the outdoor unit, FIG. 3 is a schematic perspective view showing a state in which the side panel and the top plate of the outdoor unit are removed, and FIG. 4 is a side view of the outdoor unit and the top plate. It is a schematic front view which shows the state which removed. 5 is a plan view of the outdoor unit with the top plate removed, and FIG. 6 is a plan view of the interior of the outdoor unit.
The outdoor unit 2 of the present embodiment is a top blowing type, an outdoor unit casing 5 (hereinafter also simply referred to as “casing”), an outdoor heat exchanger 13 incorporated in the casing 5, a compressor 11, four A device that constitutes the refrigerant circuit 10 (see FIG. 1) such as a path switching valve 12, an accumulator 20, and an oil separator 21, an electrical component unit 38, and a blower fan 23 provided on the upper portion of the casing 5 are provided.

  The outdoor unit 2 is configured to suck air from the side surface of the casing 5 by driving the blower fan 23, and to blow air upward from the upper part of the casing 5 after exchanging heat with the outdoor heat exchanger 13. Has been.

  As shown in FIGS. 2 and 3, the casing 5 is formed in a substantially rectangular parallelepiped shape, and includes a bottom frame 26, support columns 27, beam members 28 a to 28 d, a lower side panel 29, an upper side panel 25, and a top plate 24. Etc. The bottom frame 26 is formed in a square shape in plan view. In addition, leg portions 26 a that are in contact with the ground are provided on two sides of the bottom frame 26 facing the front and rear. The column 27 is made of a long member having a substantially L-shaped cross section and long in the vertical direction, and is attached to four corners of the bottom frame 26 with bolts or the like.

  As shown in FIG. 2, the top plate 24 is formed in a quadrangular shape in plan view substantially the same as the bottom frame 26, and is arranged above the bottom frame 26 with a gap. At the four corners of the top plate 24, the upper ends of the columns 27 are connected by a connecting tool such as a bolt. The top plate 24 is formed with a substantially rectangular ventilation hole 24a, and the ventilation hole 24a is provided with a grill 24b for preventing foreign substances from entering.

  As shown in FIGS. 3 and 5, the beam members 28 a to 28 d are arranged on the upper side of the support column 27 at a predetermined distance downward from the top plate 24 (see FIG. 2). It is constructed between the columns 27 adjacent to the left and right. The casing 5 has a skeleton formed by structural members including the bottom frame 26, the top plate 24, the support columns 27, the beam members 28a to 28d, and the like.

  A bell mouth 30 is attached to the four beam members 28a to 28d. The bell mouth 30 has a ventilation guide (a ventilation member) 30a that surrounds the outer peripheral portion of the blower fan 23. The ventilation guide 30a has a cylindrical shape along the circular rotation locus of the propeller-shaped blower fan 23 ( (Circular shape in plan view), and forms an air outlet from the casing 5. A support base 31 (see FIG. 5) is installed on the front and rear beam members 28a and 28c, and a motor 23a (see FIG. 4) of the blower fan 23 is attached to the support base 31. Therefore, the beam members 28 a and 28 c also function as attachment members for attaching the blower fan 23.

  As shown in FIG. 2, upper side panels 25 are provided on the four side surfaces of the casing 5 located between the beam members 28 a to 28 d and the top plate 24. The upper portions of the blower fan 23, the bell mouth 30, and the electrical component unit 38 are covered with the upper side panel 25 and the top plate 24 so that they are not exposed to the outside.

  As shown in FIG. 5, the rotation center O of the blower fan 23 is disposed at a position that is substantially central in the front and rear direction of the casing 5 and slightly eccentric to the right side. In addition, as shown in FIG. 2, the ventilation opening 24 a of the top plate 24 is also arranged at a position slightly eccentric to the right side in accordance with the blower fan 23. In addition, in the top plate 24, the ventilation port 24a is not formed in the upper position of the electrical component unit 38 which will be described later, thereby preventing rainwater or the like entering from the ventilation port 24a from being applied to the electrical component unit 38. doing.

  As shown in FIG. 6, devices such as the outdoor heat exchanger 13, the compressor 11, the accumulator 20, the oil separator 21, and the four-way switching valve 12 are mounted on the upper surface of the bottom frame 26 of the casing 5. The outdoor heat exchanger 13 is of a cross fin coil type, and the heat transfer tube horizontally penetrates a large number of aluminum fins, and heat exchange is performed between the refrigerant flowing through the heat transfer tube and the air flowing through the outdoor heat exchanger 13. Is configured to do.

  The outdoor heat exchanger 13 is arranged corresponding to (opposed to) the four side surfaces in a range excluding one corner (left front corner) 5A of the casing 5. Specifically, the outdoor heat exchanger 13 is bent in a substantially square shape along the four side surfaces of the casing 5. The outdoor heat exchanger 13 includes a front heat exchanging portion 32 along the front side surface (front surface) of the casing 5, a right heat exchanging portion 33 along the right side surface, and a rear heat exchanging portion along the rear side surface (rear surface). 34 and a left heat exchanging portion 35 along the left side surface. 90 between the front heat exchange unit 32 and the right heat exchange unit 33, between the right heat exchange unit 33 and the rear heat exchange unit 34, and between the rear heat exchange unit 34 and the left heat exchange unit 35. Is bent at a degree.

  In addition, each heat exchange part 32-35 of the outdoor heat exchanger 13 does not necessarily need to be arrange | positioned in parallel with respect to the side surface of the casing 5, and may be arrange | positioned in the slightly inclined state. Further, in the present specification, the side surface of the casing 5 refers to a substantial side surface facing outward, such as the upper surface panel 25 described above, the lower surface panel 29 described later, and the outer surface of the outdoor heat exchanger 13. In the case where such side panels 25, 29, etc. are not provided, a virtual surface in which the four sides of the bottom frame 26 are extended upward as they are may be used. It may be specified.

  As shown in FIG. 6, the left end portion (one side end portion in the outdoor heat exchanger 13) 32 a of the front heat exchange portion 32 and the front end portion (the other side end portion of the left heat exchange portion 35). An opening 36 is provided between 35a. In the present embodiment, the opening 36 is divided into two by a support column 27 disposed on the left front side. In the following description, the opening 36 disposed on the front surface of the outdoor unit 2 is referred to as the front opening. The opening 36 arranged on the left side surface is referred to as a left opening 36B.

  Further, the casing 5 has a lower side surface between the one side end portion 32a of the outdoor heat exchanger 13 and the support column 27 and between the support column 27 and the other side end portion 35a of the outdoor heat exchanger 13, respectively. A panel 29 is detachably provided (see FIG. 2), and the front opening 36A and the left opening 36B are closed by the lower side panel 29, respectively. Although not shown, a lattice-like frame or panel capable of air circulation may be attached to a portion of the side surface of the casing 5 where the outdoor heat exchanger 13 is disposed.

  As shown in FIG. 6, the closing valves 18 and 19 are supported via a mounting base 37 so as to face the front opening 36 </ b> A of the casing 5. Moreover, the compressor 11 is arrange | positioned at the right side of 36 A of front openings, and is arrange | positioned in the position which can visually recognize substantially the whole from the front via 36 A of front openings. Further, the accumulator 20 and the oil separator 21 on the bottom frame 26 are arranged on the rear side in the casing 5.

  As shown in FIG. 4, the width W of the front opening 36 </ b> A formed between an electrical component unit 38 (described later) and one side end 32 a of the outdoor heat exchanger 13 can pass through the compressor 11. The dimensions are set, and the compressor 11 can be taken in and out using this space for replacement of the compressor 11 and the like.

  As shown in FIG. 4, the electrical component unit 38 includes a control board 41 for controlling the entire outdoor unit 2, drive boards (inverter boards) 42 and 43 for driving the compressor 11 and the blower fan 23, and a reactor. 44, an electrical component such as a terminal block 45, and an electrical component box 50 for housing these electrical components. Also, as shown in FIG. 3, the electrical component unit 38 is disposed corresponding to one corner 5A in the casing 5, that is, the corner 5A of the casing 5 where the outdoor heat exchanger 13 is not disposed. ing.

  The electrical component box 50 is provided in a range from a substantially upper end portion of the casing 5 to a slightly lower side from an intermediate portion in the vertical direction. Therefore, the electrical component box 50 is disposed across the beam members 28a to 28d, the upper end of the outdoor heat exchanger 13, and the lower end of the cylindrical ventilation guide 30a in the bell mouth 30 in the vertical direction. The electrical component box 50 of the electrical component unit 38 is attached to the column 27 arranged at the corner 5A, the beam member 28a connected to the column 27, and the like with a bolt or the like via a bracket 83 (see FIG. 5). It is supported.

Next, the structure of the electrical component box 50 will be described in detail. 7 is a front view of the electrical component box with the front side wall removed, FIG. 8 is an exploded perspective view of the electrical component box as seen from the front obliquely upper side with the front side wall removed, and FIG. It is a perspective view of the electrical component box seen from.
The electrical component box 50 has a bottom wall 71, a top wall 72, left and right side walls (side surfaces) 73 and 74, and a rear side wall 75, and a front side opening of the box main body 70 and a front opening of the box main body 70. It has a front side wall (front surface) 76 that is freely closed.

  The left and right side walls 73 and 74 and the rear side wall 75 in the box body 70 are integrally formed by subjecting one plate material to plastic working such as press working. The bottom wall 71 and the top wall 72 are attached to the lower and upper ends of the integrally formed left and right side walls 73 and 74 and the rear side wall 75, respectively. As shown in FIG. 5, the front side wall 76 and the left side wall 73 of the electrical component box 50 are arranged orthogonal to each other, the front side wall 76 is arranged along the front surface 5 a of the casing 5, and the left side wall 73 is Arranged along the left side surface 5 b of the casing 5. In addition, as shown in FIG. 6, the electrical component box 50 is arranged at a position where the front side wall 76 is substantially the same as the front surface of the front heat exchanging part 32 or slightly behind the left side wall 73, and the left side wall 73 is left heat exchanged. The part 35 is disposed at substantially the same position as the left side surface of the part 35 or at a position entering the right side.

  In addition, the electrical component box 50 includes three parts having different shapes arranged in the vertical direction. Specifically, as illustrated in FIGS. 7 to 9, the electrical component box 50 includes an uppermost first portion 51, a lowermost second portion 52, a first portion 51, and It has a third portion 53 disposed between the second portions 52.

  The first portion 51 is disposed so as to overlap the bell mouth 30 when viewed in the horizontal direction, and the planar shape (transverse cross-sectional shape) is formed in a substantially trapezoidal shape. Specifically, as shown in FIG. 10, in the first portion 51, the front side wall 76 is disposed substantially along the front surface 5 a of the casing 5, and the left side wall 73 is disposed on the left side surface 5 b of the casing 5. The right side wall 74 is arranged substantially in parallel with the left side wall 73, and the rear side wall 75 is bent at an intermediate portion in the left-right direction. The rear side wall 75 has a parallel part 75A1 disposed substantially parallel to the front side wall 76, and an inclined part (inclined wall) 75B1 inclined with respect to the front side wall 76. As shown in FIG. 5, the inclined portion 75 </ b> B <b> 1 is inclined so as to substantially conform to the outer peripheral shape of the ventilation guide 30 a of the bell mouth 30.

  The beam member 28a provided at the front portion of the casing 5 is bent into a shape in which the left end is recessed backward. Specifically, at the left end of the beam member 28a, there is an inclined portion 28a1 inclined rearward along the shape of the inclined portion 75B1 of the rear side wall 75 in the first portion 51, and the rear from the left end of the inclined portion 28a1. A parallel portion 28a2 extending in the left direction along the shape of the parallel portion 75A1 of the side wall 75 is formed. And the 1st part 51 of the electrical component box 50 is attached to the casing 5 in the state fitted by the part of the inclination part 28a1 and the parallel part 28a2 of the beam member 28a.

  The bell mouth 30 has an outer member 30b having a substantially rectangular shape in plan view supported by the beam members 28a to 28d on the outer side in the horizontal direction of the ventilation guide 30a. A recess 30c is formed at the front left end of the outer member 30b along the first portion 51 of the electrical component box 50 and the left end of the beam member 28a.

  The first portion 51 of the electrical component box 50 extends below the beam members 28a to 28d, and is slightly below the beam members 28a to 28d on the rear side wall 75 of the first portion 51 as shown in FIG. As shown, a discharge port 57 for discharging the air in the electrical component box 50 is formed. Details of the discharge port 57 will be described later.

  As shown in FIGS. 8 and 9, the second portion 52 of the electrical component box 50 has a planar shape (cross-sectional shape) formed in a substantially rectangular shape. That is, in the second portion 52, as indicated by a two-dot chain line in FIG. 10, the front side wall 76 substantially along the front surface of the casing 5 and the rear side wall 75 behind it are arranged in parallel to each other. The left side wall 73 and the right side wall 74 to the right of the left side wall 73 substantially parallel to the left side surface are arranged in parallel to each other.

  In addition, from the middle in the vertical direction of the second portion 52 to the lower end, in other words, below the electrical wiring connection portion 45a (see FIG. 7) to which the electrical wiring in the terminal block 45 is connected, the left and right side walls 73 and 74 are disposed. At the front edge, rectangular cutouts 73A and 74A are formed that recede backward from the front side wall (front surface) 76. The front side wall 76 is provided in a range above the notches 73A and 74A, and a support plate 77 that supports a drive board 42, a refrigerant jacket 48, and the like for the compressor 11 to be described later is provided on the notches 73A and 74A. It constitutes a substantial front wall in the part. The notches 73A and 74A may be omitted, and in this case, the front side wall 76 may be extended to the lower end of the electrical component box 50.

  As shown in FIGS. 8, 9, and 12, the third portion 53 has a substantially trapezoidal planar shape (cross-sectional shape) as in the first portion 51. However, in the rear side wall 75 of the third portion 53, the width in the left-right direction of the parallel portion 75A3 and the inclined portion 75B3 gradually changes in the up-down direction. That is, as shown in FIG. 9, the width of the parallel portion 75A3 gradually increases toward the lower side, and the width of the inclined portion 75B3 gradually decreases toward the lower side. The inclined portion 75B3 is completely eliminated at the boundary portion with the second portion 52. Therefore, the inclined portion 75B3 of the third portion 53 is formed in a substantially triangular shape.

  Thus, the inclined portion 75B3 of the third portion 53 is formed in a substantially triangular shape, so that the shape of the rear side wall 75 smoothly changes from the first portion 51 to the second portion 52. Therefore, the rear side wall 75 can be integrally formed in the entire vertical direction by pressing a single plate material. Further, not only the rear side wall 75 but also the left and right side walls 73 and 74 can be integrally formed with a single plate material.

Next, the arrangement of electrical components in the electrical component box 50 will be described. 10 to 13 are cross-sectional views taken along arrows XX, XI-XI, XII-XII, and XIII-XIII in FIG.
As shown in FIGS. 7 and 10, a control board 41 and a reactor 44 are disposed on the upper part of the electrical component box 50 (the upper part of the first portion 51). A partition plate 59 that partitions the interior of the electrical component box 50 back and forth is provided in the middle of the electrical component box 50. The control board 41 is attached to the front surface of the partition plate 59, and a parallel portion 75A1 of the rear side wall 75 is provided. A reactor 44 is attached.

  The control board 41 is provided with an operation unit such as a switch for performing various settings of the outdoor unit 2 and a trial operation, and a display unit such as an LED that is lit when an abnormality occurs. The side wall 76 is provided with an operation window 76a (see FIGS. 4 and 8) for operating the operation unit and confirming the display unit. The operation window 76a is opened and closed by a lid (not shown). Thus, by arranging the control board 41 having the operation unit and the display unit on the upper part of the electrical component box 50, the user and the serviceman can easily operate the operation unit and check the display unit in a standing posture. Can do. In FIG. 10, the outer shape of the second portion 52 in the electrical component box 50 is indicated by a two-dot chain line. As apparent from FIG. 10, the second portion 52 has a larger cross-sectional area than the first portion 51.

  As shown in FIGS. 7 and 11, a noise filter substrate 49 is arranged in the middle part of the electrical component box 50 (range extending from the lower part of the first part 51 to the upper part of the third part 53). The noise filter substrate 49 is attached to the rear side wall 75 of the electrical component box 50. The partition plate 59 has a notch 59a, and a part of the noise filter substrate 49 is exposed to the front through the notch 59a.

  As shown in FIG. 7 and FIG. 12, a drive board (inverter board) 43 for the blower fan 23 and a terminal block 45 are arranged in the intermediate part (third part 53) of the electrical component box 50. Yes. The drive board 43 for the blower fan 23 is attached to the parallel portion 75A3 of the rear side wall 75, and the terminal block 45 is attached to the front surface of the partition plate 59. This front surface is a surface on which the service person approaches when performing maintenance of the electrical component box 50, and corresponds to the front side for the electrical component box 50. That is, the terminal block 45 is arranged near the front surface of the electrical component box 50. A heat sink 43b for cooling a power element 43a such as IGBT, which is a high heat generating component, is provided on the back surface of the drive substrate 43. The heat sink 43b is connected to an electrical component box through an opening 75a formed in the rear side wall 75. It is cooled by the air flow that protrudes from 50 and flows in the casing 5.

  As shown in FIGS. 7 and 13, a drive board (inverter board) 42 for the compressor 11 is provided in the lower part (second part 52) of the electrical component box 50. The drive substrate 42 is attached to the back surface of a support plate 77 attached to the edges of the notches 73A and 74A formed in the left and right side walls 73 and 74 of the electrical component box 50. The support plate 77 is provided with a heat transfer plate 77a which is a heat sink for cooling the power element 42a which is a high heat generating component (heat generating member) of the drive board 42, and a cooling jacket 48 is provided in front of the heat transfer plate 77a. Is provided in contact with the front surface. A cooling refrigerant pipe 47 routed from the refrigerant pipe of the refrigerant circuit 10 (see FIG. 1) is attached to the cooling jacket 48. Therefore, the power element 42a of the drive substrate 42 is cooled by the refrigerant flowing through the cooling refrigerant pipe 47 via the cooling jacket 48 and the heat transfer plate 77a.

  The cooling refrigerant pipe 47 is arranged so as to rise substantially vertically from below in the casing 5, change its direction into a U shape in the middle of the second portion 52, and descend substantially vertically. As shown in FIGS. 4 and 7, the cooling refrigerant pipe 47 extends from below the electrical component box 50 to the outside of the electrical component box 50.

  Since the cooling refrigerant pipe 47 is provided on the front surface of the support plate 77 disposed so as to recede from the front side wall 76 of the electrical component box 50, the cooling refrigerant pipe 47 is disposed so as to be within the plane range of the electrical component box 50. Is done. Therefore, the refrigerant piping 47 does not protrude forward from the electrical component box 50, and the planar arrangement space of the electrical component box 50 including the refrigerant piping 47 can be reduced. Further, the front side wall 76 of the electrical component box 50 can be disposed close to the lower side panel 29 of the casing 5.

  FIG. 14 is a side sectional view of the lower part of the electrical component box. The terminal block 45 in the electrical component box 50 is disposed in front of the drive substrate 42 and the support plate 77 for the compressor 11. More specifically, the drive board 42 for the compressor 11, the heat transfer plate 77 a, the refrigerant jacket 48, and the refrigerant pipe 47 supported by the support plate 77 are connected to the electric wiring 62 in the terminal block 45. It is arranged on the inner side of the electrical wiring connection part 45a or at a position behind it. The electrical wiring 62 connected to the terminal block 45 extends downward from the electrical wiring connection portion 45a of the terminal block 45, and is drawn out of the electrical component box 50 through the front side of the support plate 77.

  As described above, since the notches 73A and 74A are formed at the front edges of the left and right side walls 73 and 74 of the electrical component box 50, the operation of connecting the electrical wiring 62 to the electrical wiring connecting portion 45a of the terminal block 45, When the operation of connecting the cooling refrigerant pipe 47 to the front surface of the support plate 77 is performed, the left and right side walls 73 and 74 are hardly disturbed, and the side approach is easy. In addition, the electrical wiring 62 connected to the electrical wiring connection portion 45a of the terminal block 45 is easily routed not only below the terminal block 45 but also to the left and right sides of the electrical component box 50 through the notches 73A and 74A. . For this reason, the degree of freedom in routing the electrical wiring 62 can be increased.

  As shown in FIG. 8, air inlets 56 and 58 are formed in the bottom wall 71 and the rear wall 75 in the second portion 52 of the electrical component box 50, respectively. On the other hand, as shown in FIG. 9, a discharge port 57 for discharging cooling air is formed in the rear side wall 75 (both the parallel portion 75A1 and the inclined portion 75B1) in the first portion 51 of the electrical component box 50. Has been.

  FIG. 16 is an explanatory diagram showing the flow of air inside the outdoor unit. When the blower fan 23 provided at the upper part of the casing 5 is operated, the outside air is sucked in from the side surface of the casing 5, exchanges heat with the outdoor heat exchanger 13, and then blows upward. At this time, the inside of the casing 5 becomes negative pressure due to the operation of the blower fan 23, and in particular, the portion B shown in FIG. 16 is closer to the blower fan 23 than the lower portions A1 and A2, so the pressure is lower. .

  As described above, since the discharge port 57 is formed in the first portion 51 of the electrical component box 50 and the intake ports 56 and 58 are formed in the second portion 52, as described above. Due to the differential pressure between the B part and the A1 and A2 parts, air is taken into the electrical component box 50 from the intake ports 56 and 58 and discharged from the outlet 57, and the lower side of the electrical component box 50 is caused by this air flow. The devices, particularly the drive substrate 42, are cooled.

  In the present embodiment, since the air intake ports 56 and 58 are formed in the bottom wall 71 and the rear side wall 75 of the electrical component box 50, the flow rate of the air taken into the electrical component box 50 can be increased. . That is, as in the present embodiment, the outdoor heat exchanger 13 is disposed along four side surfaces of the casing 5 except for one corner 5A, and the electrical component box 50 is elongated in the vertical direction with respect to the corner 5A. In this case, the area of the bottom wall 71 of the electrical component box 50 is inevitably small, and it is difficult to sufficiently provide the intake port 56. In particular, in the present embodiment, since the front surface of the lower end portion of the electrical component box 50 has a receding shape, the area of the bottom wall 71 is smaller, and only the inlet 56 of the bottom wall 71 is It is more difficult to ensure the air flow rate. Therefore, by forming the intake port 58 not only in the bottom wall 71 of the electrical component box 50 but also in the rear side wall 75, it is possible to take in a sufficient flow rate of air into the electrical component box 50. In addition to or instead of the rear side wall 75, it is also possible to form intakes 58 in the left and right side walls 73, 74 and the front side wall 76.

  As shown in FIG. 14, the intake port 58 formed in the rear side wall 75 is composed of a plurality of slits formed side by side in the vertical direction, and a flange 58a protruding obliquely downward rearward is formed on the upper edge of each slit. Is formed. By this ridge 58a, the intrusion of moisture from the intake port 58 into the electrical component box 50 is prevented. Further, the intake port 58 is covered from the rear, the upper, and the left and right sides by a cover member 80 opened downward. The covering member 80 also prevents moisture from entering the electrical component box 50 from the intake port 58.

FIG. 15 is a side sectional view showing a discharge port for discharging air in the electrical component box.
The discharge port 57 is also composed of a plurality of slits formed side by side in the vertical direction, and a flange 57a is formed on the upper edge of each slit so as to project obliquely downward. Further, the discharge port 57 is covered from the rear, the upper, and the left and right sides by a cover member 81 opened downward. Therefore, the intrusion of moisture from the outlet 57 into the electrical component box 50 is prevented by the flange 57a and the covering member 81.

  In the said embodiment, the outdoor heat exchanger 13 is arrange | positioned corresponding to the four side surfaces of the casing 5 (refer FIG. 6). Therefore, compared with the case where the outdoor heat exchanger 13 is arrange | positioned corresponding to the three side surfaces of the said casing 5, the distribution | circulation area of air can be expanded and the capability of heat exchange can be improved. In other words, by arranging the outdoor heat exchanger 13 so as to correspond to the four side surfaces of the casing 5, even if the size of the casing 5 is reduced, the air circulation area can be maintained. Therefore, the casing 5 can be downsized without reducing the capacity of the outdoor heat exchanger 13.

  On the other hand, when the outdoor heat exchanger 13 is disposed corresponding to the four side surfaces of the casing 5, the outdoor heat exchanger 13 is formed between one side end portion 32a and the other side end portion 35a. The opening portion 36 becomes smaller, and the proportion of the arrangement space of the electrical component box 50 in the opening portion 36 becomes relatively larger. Therefore, workability may deteriorate when work such as maintenance or replacement of equipment in the casing 5 is performed using the remaining space of the opening 36.

  In this regard, in the outdoor unit 2 of the present embodiment, the upper part of the electrical component box 50 is disposed above the outdoor heat exchanger 13 and is disposed so as to overlap the ventilation guide 30a when viewed in the horizontal direction. Compared with the case where the entire product box 50 is disposed below the upper end of the outdoor heat exchanger 13, the arrangement space of the electrical component box 50 in the opening 36 can be reduced. Therefore, the space of the remaining opening 36 excluding the arrangement space of the electrical component box 50 can be secured as wide as possible, and maintenance and the like for the equipment in the casing 5 are performed using the opening 36. Can be made easier.

  Moreover, since the area | region of the ventilation direction 30a horizontal direction outer side becomes a dead space which hardly contributes to the flow of the air in the casing 5, even if it arrange | positions a part of electrical component box 50 in this area | region, the casing 5 There is almost no adverse effect on the air flow inside, and the heat exchange efficiency is not deteriorated.

  Further, the upper part (first portion 51) of the electrical component box 50 is formed in a substantially trapezoidal shape or a substantially triangular shape in plan view having an inclined portion 75B1 substantially along the ventilation guide 30a. The electrical component box 50 can be arranged by utilizing the dead space in 5A more widely and effectively. That is, since the conventional general electrical component box is formed in a rectangular shape in a plan view, even if an electrical component box is arranged in the dead space between the corner 5A of the casing 5 and the ventilation portion 30a, the rectangular However, the electrical component box 50 of the present embodiment has an inclined portion (inclined wall) 75B1 that matches the outer peripheral shape of the ventilation guide 30a. The dead space can be utilized as widely as possible, and a sufficient volume in the electrical component box 50 can be secured. The inclined portion 75B1 is a flat surface extending linearly in the tangential direction of the outer periphery of the ventilation guide 30a in plan view, but may be an arcuate curved surface along the outer peripheral shape.

  Further, the electrical component box 50 has the second portion 52 having a cross-sectional area larger than that of the first portion 51 below the first portion 51. The volume can be increased without enlarging the directional dimensions. Therefore, a wide space for the opening 36 below the electrical component box 50 can be secured. Further, the second portion 52 has a cross-sectional area enlarged in the front-rear direction (depth direction) with respect to the first portion 51, and the width in the left-right direction (the dimension of the front opening 36A in the width direction) is the first portion. Since it is the same as 51 and the 3rd part 53, the width W of the front opening part 36A between the electrical component box 50 and the outdoor heat exchanger 13 can also be ensured enough.

  As shown in FIGS. 3 and 4, the electrical component box 50 is disposed at the left front corner 5 </ b> A of the casing 5. On the other hand, as shown in FIG. 5, the blower fan 23 includes the electrical component box 50. The other corner portions that are not arranged, specifically, the right and left corner portions of the casing 5 are arranged so as to be biased. Therefore, a relatively wide space can be formed on the left front side of the casing 5 in order to arrange the electrical component box 50. Further, as shown in FIGS. 5 and 6, the outdoor heat exchanger 13 has a larger air flow area on the right side than on the left side of the casing 5. 5 is biased to the right. Therefore, more air can be sucked in from the right side of the casing 5 and heat exchange can be performed by the outdoor heat exchanger 13 more efficiently.

[Other variations]
The present invention is not limited to the above-described embodiment, and can be appropriately changed within the scope of the invention described in the claims.
For example, in the embodiment described above, the compressor drive board 42 is disposed below the terminal block 45, but the compressor drive board 42 may be disposed obliquely below the terminal block 45. However, if the drive board 42 of the compressor is disposed below the terminal block 45, the size of the electrical component box can be reduced and the electrical component box can be made compact. There is an advantage that it can be easily released in the lateral direction.
The shapes of the cutouts 73A and 74A may be other than the rectangular shape.

  Further, the front side wall 76 of the electrical component box 50 may be shared by the lower side panel 29 of the casing 5. The electrical component box 50 may not include the third portion 53, and the second portion 52 may be formed below the first portion 51.

  Moreover, the outdoor heat exchanger 13 can also be comprised by combining two substantially L-shaped heat exchangers corresponding to the two adjacent side surfaces of the casing 5, for example. Moreover, the casing 5 should just have at least four side surfaces. For example, the planar shape is not limited to a rectangular shape, and may be a pentagonal shape or more.

Moreover, although the outdoor unit 2 which concerns on embodiment mentioned above was provided with the one compressor 11, you may be provided with the two or more compressors 11. FIG. Also in this case, the opening width W of the front opening portion 36A is set to a width that allows one compressor 11 to be taken in and out, and a plurality of compressors 11 can be taken in and out from the front opening portion 36A one by one in order. can do.
Moreover, although the outdoor unit 2 which concerns on embodiment mentioned above was provided with the 1 unit | set of the ventilation fan 23, you may be equipped with the 2 or more units | set of the ventilation fan 23 side by side.

DESCRIPTION OF SYMBOLS 1 Air conditioning apparatus 2 Outdoor unit 5 Casing 11 Compressor 13 Outdoor heat exchanger 23 Blower fan 38 Electrical component unit 42 Drive board 42a Power element 45 Terminal block 45a Electrical wiring connection part 47 Refrigerant piping 48 Refrigerant jacket 50 Electrical component box 73 Left side Wall 73A Notch 74 Right side wall 74A Notch 75 Rear side wall 76 Front side wall 77a Heat transfer plate

Claims (4)

A casing (5);
A compressor (11) and an electrical component box (50) accommodated in the casing (5),
The electrical component box (50) is provided with a terminal block (45),
The compressor drive board (42) including the heat generating member (42a) cooled by the refrigerant is located behind the electrical wiring connection (45a) to which the electrical wiring (62) of the terminal block (45) is connected. Is disposed at the bottom of the electrical component box,
Notches (73A, 74A) of a shape retreating from the front surface of the electrical component box (50) on the side surface of the electrical component box (50) below the electrical wiring connection portion (45a) of the terminal block (45) An outdoor unit of an air conditioner characterized in that is formed.   The outdoor of the air conditioner according to claim 1, wherein the refrigerant pipe (47) and the refrigerant jacket (48) for cooling the refrigerant are disposed at positions retracted rearward from the electrical wiring connection portion (45a). Machine.   The outdoor unit for an air conditioner according to claim 2, wherein the notches (73A, 74A) have a shape that is retracted to a support plate (77) that supports the drive substrate (42) and the refrigerant jacket (48).   The drive board (42) is disposed below the terminal block (45), and the refrigerant pipe (47) extends from below the electrical component box (50) to the outside of the electrical component box (50). The outdoor unit of the air conditioning apparatus of Claim 2 or 3 provided.

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