JP7227552B2 - outdoor unit of air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an outdoor unit for an air conditioner, and more particularly to the structure of an electrical component unit provided in the outdoor unit.

A multi-room type air conditioner is known in which one outdoor unit installed outdoors and one or more indoor units installed in an air-conditioned room are connected via refrigerant pipes to form a refrigeration cycle. . Inside the outdoor unit, a machine room with a compressor, an accumulator, pipes, etc., a heat exchanger, a blower fan, etc. are installed by means of a partition plate erected on the bottom plate that constitutes part of the outdoor unit housing. It is divided into a fan room and a In the upper part of the machine room, an electric component unit including a power supply unit that supplies driving power to devices such as a compressor and a blower fan, a control board that controls the operation of the outdoor unit, and the like is arranged.

For example, in the outdoor units described in Patent Documents 1 and 2, as electrical component units, a first electrical component unit in which predetermined electrical components are mounted on an electrical component part partition plate included in the upper part of the partition plate, and a service panel a second electrical component unit in which a predetermined electrical component is mounted on a mounting substrate supported openably and closably in the shape of a door at the front end of the first electrical component unit on the side.

For example, as described in Patent Document 3, electrical wiring (especially power lines) from a compressor, a blower fan, etc. is routed from a terminal block provided in a second electrical component unit that can be opened and closed like a door to an electrical component unit. drawn into. When an inverter board for power supply control is arranged on the first electrical component unit side, a power supply line is routed as a relay electrical wiring between the first electrical component unit and the second electrical component unit.

As the air-conditioning capacity increases, the drive current value of the compressor and the like also increases, so a power supply line with a large diameter is used. As the wiring becomes thicker, the rigidity against bending becomes stronger, so that it becomes difficult to route the wiring, and the opening and closing of the second electrical component unit is also hindered.

JP 2012-159222 A JP 2013-50255 A JP 2017-110881 A

Accordingly, an object of the present invention is to provide a second electrical component unit that can be opened and closed with respect to the first electrical component unit, and an electrical wiring (particularly a power supply line) that spans between the first and second electrical component units. To facilitate wiring even when a thick-diameter electric wiring is used in an outdoor unit of an air conditioner provided with an electric component unit which is connected to a second electric component unit so as not to interfere with the opening and closing of the second electric component unit.

In order to solve the above-mentioned problems, the present invention has a rectangular parallelepiped housing, and the inside of the housing is divided into a blower chamber by a lower partition plate and an electrical part partition plate placed on the lower partition plate. The machine room is divided into machine rooms, and a fan and a heat exchanger are arranged in the blower room. In the machine room, an electric component unit is arranged in the upper part, and refrigerant circuit parts including an accumulator and refrigerant pipes are arranged in the lower part. In an outdoor unit of an air conditioner in which a service panel that covers the electrical component unit is detachably provided on a part of the body,
The electrical component unit includes a first electrical component unit in which an electrical component is attached to the electrical component part partition plate, and one end of which is pivotally supported at a front end of the first electrical component unit and can be opened and closed with respect to the first electrical component unit. a second electrical component unit having a board fixing plate; and electrical wiring that spans between the first electrical component unit and the second electrical component unit,
The circuit board fixing plate of the second electrical component unit is provided with a box-shaped wiring storage section for storing the excess length of the electrical wiring so as to protrude toward the service panel. there is

According to a preferred aspect of the present invention, a wire hanger for locking a portion of the electric wire is provided in the wire housing portion. Further, the excess length of the electrical wiring is stored in the wiring storage portion in a ring shape. The wiring housing portion is formed with a ventilation port for improving the passage of air on the front side of the substrate fixing plate facing the service panel. Such aspects are also included in the present invention.

According to the present invention, a box-shaped wire storage in which the surplus length of the electrical wiring (particularly the power wire) is stored in the board fixing plate of the second electrical component unit that can be opened and closed with respect to the first electrical component unit. By providing the part so as to protrude toward the service panel side, even if an electrical wire with a large diameter is used, it can be easily routed and the opening and closing of the second electrical component unit can be prevented from being hindered.

BRIEF DESCRIPTION OF THE DRAWINGS The front side perspective view which shows one Embodiment of the outdoor unit of the air conditioner by this invention. The back side perspective view of the outdoor unit of the said air conditioner. The perspective view which shows the internal structure of the outdoor unit of the said air conditioner. FIG. 4 is an enlarged perspective view showing an electrical component unit provided in the outdoor unit of the air conditioner. FIG. 4 is a perspective view showing parts of a lower partition plate and an electrical part partition plate of the electrical component unit; The perspective view which shows the attachment state of the said electrical component unit. The perspective view which shows the said electrical part partition plate. FIG. 2 is an exploded perspective view showing the electrical component unit; FIG. 3 is a perspective view showing a framework of the electrical component unit; (a) A left side perspective view and (b) an exploded view showing a first electrical component unit included in the electrical component unit. AA partial sectional view of FIG. The right side perspective view showing the inside of the electrical component unit. FIG. 4 is a perspective view showing a top board and a board fixing tool provided in the electrical component unit in a separated manner; The perspective view which shows the assembly method of the 3rd electrical component unit contained in the said electrical component unit. FIG. 4 is a perspective view showing another embodiment of the electrical part partition plate of the electrical part unit; (a) A perspective view showing an upper portion of another embodiment of the electrical component part partition plate, (b) A schematic view for explaining the bending angle of the second electrical component part partition plate with respect to the first electrical component part partition plate. FIG. 4 is a schematic perspective view showing a state in which the electrical component unit is lifted using a handle provided inside. As a preferred embodiment of the present invention, a perspective view of a main portion showing an example in which a receiving plate for an electrical component unit is provided at the upper end of the lower partition plate. (a), (b) Explanatory drawing which shows the state which moves an electrical component unit to a fixing position by using the said receiving plate as a guide. FIG. 4 is a perspective view showing an embodiment with improved heat dissipation paths of a second electrical component unit included in the electrical component unit; FIG. 20 is a perspective view in which the direction of flow of cooling air is written in FIG. 20;

Next, some embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

An outdoor unit of an air conditioner according to the present invention is installed outdoors and connected to one or more indoor units installed in an air-conditioned room via refrigerant pipes to form a refrigeration cycle.

First, referring to FIGS. 1 and 2, an outdoor unit 1 (hereinafter simply referred to as outdoor unit 1) of an air conditioner according to this embodiment has a substantially rectangular parallelepiped housing 11. As shown in FIG. In the rectangular parallelepiped housing 11, the upper surface side is the upper surface or the upper side, the opposite side of the upper surface is the bottom surface or the lower side, the surface with the outlet 31 described later is the front side or front side, the front side is the rear side or the rear side, and the outside air intake is described later. In the following description, the surface on which the inlet 141 is located is defined as the right side or right side, and the opposite side of the right side is defined as the left side or left side. The same applies to each component.

The outer shell of the housing 11 is mainly made of steel plate, and the front and left side surfaces of the housing 11 are covered with a front panel 30 . At two upper and lower positions on the front surface of the front panel 30, air outlets 31 are provided which are circularly opened so as to correspond to blower fans 21, which will be described later.

A bell mouth 32 formed in a trumpet shape by extending the steel plate of the front panel 30 inward is provided around the outlet 31 . The air outlet 31 is covered and protected by a fan guard 35 made of wire. In this embodiment, the left side surface of the front panel 30 is provided with a suction port 33 consisting of 5 horizontal×7 vertical rectangular holes.

The right side of the front surface and the front side of the right side surface of the housing 11 are covered with a lower piping cover 12 and an upper service panel 13 . The pipe cover 12 and the service panel 13 are detachable for connection and maintenance of refrigerant pipes and cables (not shown).

The back side of the right side of the housing 11 and part of the back are covered with a back panel 14 . A plurality of laterally elongated outside air intakes 141 for taking outside air into the electrical component unit 5 described later are provided at the lower right side surface of the rear panel 14 .

The front panel 30, the pipe cover 12, and the rear panel 14 are assembled by screws to a bottom plate 15 having legs 151 that serve as the bottom surface of the housing 11 and support the housing 11. The front panel 30, the service panel 13, and the rear panel 14 The upper end is covered with a top plate 16 .

The top plate 16 is attached to the front panel 30, the service panel 13, and the rear panel 14 by screwing. In FIG. 1, the upper portion of the service panel 13 is cut away to show the electric component unit 5 inside.

As shown in FIG. 3, inside the housing 11, a bottom plate 15 is erected, and the right end of the front panel 30 is screwed. The lower partition plate 24 having a height up to the lower end and the electrical part partition plate 52 placed on the front side of the lower partition plate 24 separate the fan room FR on the front panel 30 side and the machine room MR on the service panel 13 side. are separated by An upper partition plate 26, which will be described later, is arranged on the rear side of the lower partition plate 24. As shown in FIG.

Propeller fan type blower fans 21 are provided at two upper and lower positions in the blower room FR. The blower fan 21 is pivotally supported by a fan motor 20 fixed to a motor support 19 supported by the bottom plate 15 .

In addition, a heat exchanger 18 having an L-shape in top view is arranged from the left side to the back in the fan room FR. The heat exchanger 18 is composed of a plurality of fins 181 arranged in parallel and heat transfer tubes 182 arranged in a meandering manner so as to intersect the fins 181 at right angles.

With reference to FIG. 2, on the back side of housing 11, heat exchanger 18 is exposed between the side edge of back panel 14 and the side edge of front panel 30. As shown in FIG. On the back side of the housing 11, a portion where the heat exchanger 18 is exposed is a back suction port 22 for taking outside air into the fan chamber FR, and the back suction port 22 is provided with a protective member 23.

Returning to FIG. 3, in the machine room MR, the electrical equipment unit 5 is arranged in the upper part, and the refrigerant circuit parts 4 such as the accumulator 40, the compressor 41, the four-way valve 42, the refrigerant pipe 43 and the expansion valve 44 are arranged in the lower part. It is

With the above configuration, the outdoor unit 1 of the air conditioner transfers the heat of the high-temperature/high-pressure refrigerant flowing through the heat transfer tubes 182 of the heat exchanger 18 during cooling operation, for example, from the heat transfer tubes 182 to the fins 181. At the same time, the fins 181 are cooled by the air sucked from the suction port 33 and the rear suction port 22 by the blower fan 21, thereby performing heat exchange.

As shown in FIG. 4 , the heat exchanger 18 includes a heat exchanger mounting plate 183 surrounding the right end of the heat exchanger 18 . The heat exchanger mounting plate 183 has a plurality of holes through which the heat transfer pipes 182 pass and are connected to other heat transfer pipes 182 and refrigerant pipes 43 . Although not shown, the heat exchanger 18 is erected by fixing the lower end of the heat exchanger mounting plate 183 to the bottom plate 15 .

The front end of the heat exchanger mounting plate 183 is bent at right angles to the heat exchanger 18 side to form a heat exchanging corner portion 185 . A lower partition plate 24 and an upper partition plate 26, which will be described later, are assembled to the heat exchanger mounting plate 183 and the heat exchange corner portion 185 and screwed.

Also referring to FIG. 5, the lower partition plate 24 extends along the refrigerant circuit components 4 (the accumulator 40, the compressor 41, the refrigerant pipe 43, etc.) arranged inside the machine room MR. A first partition surface 241 on the front side parallel to the side surface, a second partition surface 242 on the back side parallel to the back surface of the housing 11 and fixed to the heat exchanger mounting plate 183, the first partition surface 241 and the second partition surface 242 It has a third partition surface 243 connecting the partition surfaces 242 with an inclined surface.

The lower partition plate 24 has a lower front flange portion 244 bent toward the machine room MR at its front end. Further, the lower partition plate 24 has a receiving portion 25 bent toward the machine room MR at its upper end.

The receiving portion 25 located on the first partition surface 241 is a rail receiving portion 251 . The end of the rail receiving portion 251 on the third partition surface 243 side is provided with a stopper extension portion 251a partially extending toward the machine room MR at a position where a stopper 57 described later stops.

An upper partition plate 26 is provided above the second partition surface 242 of the lower partition plate 24 . The upper partition plate 26 is bent rearward at its right end and screwed to the heat exchanger mounting plate 183 . The left end of the upper partition plate 26 is fixed to the electrical component partition plate 52 .

At the lower end of the upper partition plate 26, fixed pieces 262 and 263 are provided that are bent so as to come into contact with the receiving portions 25 of the lower partition plate 24. As shown in FIG. Also referring to FIG. 6, an insertion claw 264 is provided on the upper left part of the upper partition plate 26 and gradually rises toward the direction of the fan chamber FR. An inwardly extending fixture 265 is provided on the upper right portion of the upper partition plate 26 .

As shown in FIGS. 5 and 7, the electrical component partition plate 52 has a mounting surface 53 positioned above the first partition surface 241 of the lower partition plate 24 formed by bending a steel plate, and is perpendicular to the rear side of the mounting surface 53 . a curved corner 541, a fixing surface 54 extending from the corner 541 to the upper partition plate 26 and fixed to the upper partition plate 26, and a post attachment portion 521 that is bent in multiple stages from the front end of the attachment surface 53 and becomes a concave portion. , and an upper front flange portion 522 that is flush with the lower front flange portion 244 on the front surface of the post mounting portion 521 .

The electrical part partition plate 52 is further connected to a support 55 which is fixed inside the support mounting part 521 and whose right side protrudes beyond the upper front flange part 244, and the lower end corners of the mounting surface 53 and the fixing surface 54. A corner fixing plate 56 is provided that contacts the receiving portion 25 of the third partition surface 243 with a bent piece 561 that is bent downward.

A lower end of the mounting surface 53 serves as a rail surface 58 bent toward the fan chamber FR side. The rail surface 58 has a rail guide portion 581 in which the end of the rail surface 58 is bent downward. A stopper 57 extending downward from the rail surface 58 is provided at the lower portion of the mounting surface 53 on the machine room MR side, and the bottom surface of the support column mounting portion 521 at the front end is bent downward toward the machine room MR side. A front guide portion 523 is provided.

A lateral width W1 from the inner side of the rail guide portion 581 to the inner side of the front guide portion 523 is the same as the lateral width of the rail receiving portion 251 of the lower partition plate 24 . The lateral width W2 of the rail surface 58 is the same as the lateral width of the stopper extension 251a.

As a result, the stopper extending portion 251a is regulated between the rail guide portion 581 and the stopper 57, and the rail receiving portion 251 is regulated between the rail guide portion 581 and the front guide portion 523 to prevent rattling. .

Next, the configuration of the electrical component unit 5 will be described. As shown in FIG. 8, the basic structure of the electrical component unit 5 consists of a first electrical component unit 6 including electrical components attached to an electrical part partition plate 52, and one end supported by the front end of the first electrical component unit 6. a second electrical component unit 7 arranged on the service panel 13 side and orthogonal to the first electrical component unit 6; It is formed by three surfaces of the third electrical component unit 8 arranged in the same direction.

By assembling three surfaces of the first electrical component unit 6, the second electrical component unit 7 and the third electrical component unit 8 so as to intersect substantially at right angles, a rectangular parallelepiped inside the electrical component unit 5 shown in FIG. space is formed.

This space serves as a pipe accommodating portion 45, and part of the refrigerant circuit components 4 arranged in the machine room MR shown in FIGS. can be accommodated. As a result, the height of the housing 11 can be made low, and the outdoor unit 1 can be made compact.

As shown in FIG. 9, the framework of the electrical component unit 5 includes the aforementioned electrical component partition plate 52 of the first electrical component unit 6, the substrate fixing plate 71 of the second electrical component unit 7, and the third electrical component unit 8. is formed by a support frame 81 of

As shown in FIGS. 4, 8, and 10, electrical parts can be provided on both sides of the electrical part partition plate 52 of the first electrical component unit 6 and the board fixing plate 71 of the second electrical component unit 7, respectively. is.

13 and 14, a board fixing assembly 84 including a top board 82 is detachably attached to the support frame 81 of the third electrical component unit 8. Electrical components can be provided. As a result, it becomes possible to sufficiently arrange a large-sized substrate and power supply components accompanying the increase in capacity.

The support frame 81 of the third electrical component unit 8 is formed of a steel plate and has a U-shaped cross section provided with reinforcing portions 817 and 818 bent inward on the top and bottom of the support frame 81, as shown in FIG. In addition, it is bridged over both front and rear upper ends of the electrical part partition plate 52 .

The support frame 81 includes a rear arm portion 811 screwed to the upper end of the fixing surface 54 of the electrical component partition plate 52 , a right arm portion 812 bent at right angles from the rear arm portion 811 , and a right arm portion 812 bent at right angles from the right arm portion 812 . A front arm portion 813 which is partially inclined forward and is screwed to the upper end of the upper front flange portion 522 is provided.

The rear arm portion 811 has an insertion claw hole 811 a at a position facing the insertion claw 264 of the upper partition plate 26 , and a rear mounting fixture 814 bent to the rear side at a position facing the fixture 265 . It is The rear fixture 814 has two engagement holes 811b on the left and right.

Further, in front of the right arm portion 812, there is a right fixture 815 bent to the right. The forearm portion 813 has a crank-like front attachment 816 that bends along the bottom surface of the forearm portion 813 from the front surface and then bends downward. A portion of the front fixture 816 further bends forward to form a hooking claw 816a.

Also referring to FIG. 7, the support 55 described above has a height from the lower end of the electrical part partition plate 52 to the bottom of the support frame 81, and two upper and lower hinges are provided on the front side of the support 55. A slit 551 is provided. The hinge slit 551 has an upwardly elongated groove 552 at its left upper end and a downwardly elongated groove 553 at its right lower end.

The substrate fixing plate 71 is formed of a steel plate. It has an inclined surface 712 that is inclined forward left.

At the left end of the inclined surface 712, there is a hinge surface 713 parallel to the front surface, and two hinge pieces 714 protrude leftward from the end of the hinge surface 713 at positions facing the hinge slits 551 of the post 55. is provided as follows.

The substrate fixing plate 71 has an opening 73 cut from the hinge surface 713 to the inclined surface 712 . The opening 73 has a height approximately half the height of the substrate fixing plate 71 and is opened widely at the vertical center of the substrate fixing plate 71 .

The inclined surface 712 is provided with hole-shaped connector relay portions 74 at two upper and lower positions in the vicinity of the opening 73 . A relay connector 741 is fitted to the connector relay portion 74 .

Further, the mounting surface 710 of the substrate fixing plate 71 and the right end of the terminal block mounting surface 711 are bent rearward and further to the right to form a flange portion 716 fixed to the back panel 14 . In addition, a locking hole 715 is provided at the upper end of the mounting surface 710 .

By inserting the hinge piece 714 into the groove 552 of the hinge slit 551 of the post 55 from the front and moving the mounting surface 710 rearward, the board mounting plate 71 is fitted with the groove 553 of the hinge slit 551 . match. As a result, the second electrical component unit 7 is supported by the column 55 of the first electrical component unit 6 so as to be openable and closable.

Next, the hooking claw 816a of the front fixture 816 of the support frame 81 is hooked to the locking hole 715 at the upper end of the mounting surface 710, and the screw hole beside the locking hole 715 and the screw hole of the front fixture 816 are screwed. Thus, the framework of the electrical component unit 5 is assembled.

Various electrical components such as heat sinks 631, 632, and 633, an inverter board 611, and a capacitor 821, which will be described later, are attached to the electrical component unit 5, and the electrical component unit 5 itself is made of a steel plate. weighs about 15 kg.

In order to easily place it on the lower partition plate 24, first, the electrical component unit 5 is raised to the height of the lower partition plate 24 as shown in FIG. Next, position the rail receiving portion 251 of the lower partition plate 24 between the rail guide portion 581 of the electrical component partition plate 52 and the stopper 57 so as to sandwich the rail surface 58 on the rail receiving portion 251 . put it on

Then, the electrical component unit 5 is slid backward. If the corner fixing plate 56 is moved as it is, the bent piece 561 of the corner fixing plate 56 comes into contact with the receiving portion 25 of the third partition surface 243 and stops. At this time, the stopper extending portion 251a of the lower partition plate 24 is restricted between the rail guide portion 581 and the stopper 57, and the front of the rail receiving portion 251 is restricted between the rail guide portion 581 and the front guide portion 523. By doing so, the electrical component unit 5 is temporarily fixed while preventing lateral displacement.

As the electrical component unit 5 moves, the insertion claws 264 of the upper partition plate 26 are fitted into the insertion claw holes 811a of the support frame 81, so that the upper end of the electrical component unit 5 is also temporarily fixed.

The temporarily fixed electrical component unit 5 is screwed to the rear fixture 814 of the support frame 81 and the fixture 265 of the upper partition plate 26 . The electrical component unit 5 is fixed to the machine room MR by screwing the right fixture 815 of the support frame 81 and the flange 716 of the board mounting plate 71 to the rear panel 14 .

As shown in FIGS. 7, 8, and 10 to 12, each electrical component is attached to the first electrical component unit 6 via a steel plate mounting base 61 on the mounting surface 53 of the electrical component partition plate 52. . According to this embodiment, an inverter board 611 is arranged behind the mounting base 61 (on the right side of the mounting base 61 in FIG. 8), and two fan motor drives are arranged in front of the mounting base 61 (on the left side of the mounting base 61 in FIG. 8). Boards 62 are arranged one above the other, and a diode bridge 614 is placed on the fan motor drive board 62 . All of them are substrates and heat-generating parts on which heat-generating elements are mounted.

Therefore, in order to cool these electrical parts, the electrical part partition plate 52 and the mounting base 61 have mounting holes 531 and 616 corresponding to the inverter board 611, the fan motor drive board 62 and the diode bridge 614, respectively. Heat sinks 631, 632, and 633 are provided on the blower chamber FR side of the partition plate 52 to cover the attachment hole 531 and cool the inverter board 611, the fan motor drive board 62, and the diode bridge 614, respectively.

The heat sinks 631, 632, and 633 have a plurality of heat radiation fins 63a arranged vertically, and a ventilation passage 632 is formed so that air K1, which will be described later, flows horizontally.

A reactor 613, which is a heat-generating component, is provided on the inverter board 611. The reactor 613 is covered with a U-shaped duct 651 that is open on the front side and the back side. The mounting base 61 has a vent hole 532 in alignment with the reactor 613 . On the blower chamber FR side of the electrical component partition plate 52, a water impermeable lid 64 having a plurality of horizontally elongated slit-shaped ventilation holes 641 with a canopy provided on the upper portion thereof covering the ventilation port 532 is provided.

The mounting surface 53 of the electrical component partition plate 52 is provided with an air intake port 59 between a corner portion 541 (back side of the electrical component partition plate) with the fixing surface 54 and one end side of the heat sink 631 . The air intake port 59 consists of a plurality of vertically long slit-shaped ventilation holes 591 inclined toward the machine room MR side toward the rear side by press working. ing.

The mounting base 61 is provided with a ventilation guide portion 617 that protrudes toward the machine room MR around the air intake port 59 and guides the air K1 to the air intake port 59 . An opening in the ventilation guide portion 617 serves as an air inlet 615 .

The air intake port 59 is positioned adjacent to the heat sink 631 on the fan chamber FR side and has the same height as the heat sink 631 . The air intake port 59 and the heat sink 631 are surrounded by an air guide cover 652 . The air guide cover 652 has an air guide surface 653 inclined on the side of the air intake port 59 and has an air outlet 654 in front of the heat sink 631 .

Next, the air flow inside the electrical component unit 5 will be described. The air drawn by the blower fan 21 and flowed in from the outside air intake 141 of the rear panel 14 rises in the machine room MR, cools the electrical components in the electrical component unit 5, and reaches the waterproof cover 64 through the duct 651. It becomes the air K2 that flows from the ventilation hole 641 directly toward the blower fan 21 into the blower chamber FR.

Air K1, which is part of the air, enters the air inlet 615 of the mounting base 61, flows along the ventilation guide portion 617 protruding from the mounting base 61, and flows from the air inlet 59 into the wind guide cover 652. The air passes through the ventilation path 63b of the heat sink 631 along the air guide surface 653 of the air guide cover 652, cools the heat sink 631, and reaches the air outlet 654 to the fan chamber FR.

By providing the air guide cover 652 for directing the air before heat exchange to the heat sink 631, the board and the heat generating components mounted with the heat generating elements mounted with the heat sink 631 can be efficiently cooled. In addition, a triple waterproof structure is formed by the wind guide cover 652, the vertically long slit-shaped ventilation hole 591 inclined toward the machine room MR side, and the ventilation guide portion 617 that partially covers the air intake port 59. Intrusion of water from the blower FR chamber can be reliably prevented.

In addition, the air K2 that cools the electrical components in the electrical component unit 5 and flows into the fan chamber FR from the waterproof lid 64 directly toward the blower fan 21 and the air K2 that flows through the wind guide cover 652 and cools the heat sink 631 cools the fan chamber FR. The outflow direction is different from that of the air K1 flowing in front of the FR, so that the electric components can be efficiently cooled without affecting each other, and the heat dissipation efficiency can be improved.

As described above, the first electrical component unit 6 includes two fan motor drive boards 62 arranged vertically in front of the mount 61 (closer to the service panel 13). Each fan motor drive board 62 is provided with a first connector 621 and a second connector 622 . The first connector 621 is connected with the first cable 46 that drives the fan motor 20 , and the second connector 622 is connected with the second cable 47 that is the signal line of the fan motor 20 .

The first connector 621 is arranged in front of the fan motor drive board 62 (near the service panel 13 side), and as shown in FIGS. visible.

Referring to FIG. 3, first cable 46 and second cable 47 connected to fan motor 20 enter machine room MR from outlet 245 in first partition surface 241 of lower partition plate 24 . A connector 461 is provided at the tip of the first cable 46 , and this connector 461 can be directly inserted into the first connector 621 of the fan motor drive board 62 through the opening 73 .

The second connector 622 is connected to a relay connector 741 provided on the connector relay portion 74 on the inclined surface 712 , and the second connector 622 is connected by connecting the second cable 47 to the relay connector 741 of the connector relay portion 74 . 622 can be connected.

As a result, connection and maintenance of the first cable 46 and the second cable 47 can be performed without opening the second electrical component unit 7 of the electrical component unit 5, thereby improving workability.

As shown in FIG. 13, the third electrical component unit 8 has a top substrate 82 fixed to a substrate fixture 83 to form a substrate fixing assembly 84 shown in FIG. Mounted from.

The top substrate 82 has a capacitor 821 and other electrical components on the bottom surface of a substrate made of a rectangular plate material. The substrate fixture 83 is made of a resin material and has a rectangular fixing frame 831 surrounding the top substrate 82 . The fixed frame 831 supports the top substrate 82 with a substrate supporting portion 832 provided in a rim shape at the inner lower portion of the fixed frame 831 .

Furthermore, the fixed frame 831 has three protruding pieces 833 protruding from the inside upper part of the right long side, three places protruding from the inside of the left long side of the fixed frame 831, and one place from the inside of the front short side. A locking pawl 834 is provided. The board support portion 832 is notched at a portion where the protruding piece 833 and the locking claw 834 are located.

The distance from the upper surface of the substrate supporting portion 832 to the lower ends of the protruding pieces 833 and the locking claws 834 is substantially the same as the thickness of the plate of the top substrate 82 . Two beams 835 are provided below the substrate fixture 83 to reinforce the fixing frame 831 so that it does not come into contact with the capacitor 821 . Note that the projecting piece 833 may be used as the locking claw 834 .

As shown in FIG. 13, the top substrate 82 is inserted into the substrate fixture 83 from above, and after the right long side is fitted between the substrate support portion 832 and the protruding piece 833, the top substrate 82 is secured to the locking claws 834. It is fixed by fitting so that it is located under the

Also referring to FIG. 8, the substrate fixture 83 has two engaging claws 836, 836 protruding to the rear side outside a fixing frame 831 located on one short side (back side) of the top substrate . is provided.

Further, as shown in FIG. 13, the substrate fixture 83 is provided with two mounting pieces 838, 838 protruding outside the fixing frame 831 located on the other short side (front side) of the top substrate 82. there is

The attachment piece 838 has a claw portion 838 a that rests on the reinforcing portion 818 of the support frame 81 when assembled with the support frame 81 . Furthermore, between the mounting pieces 838 , 838 is provided a screw piece 837 positioned below the support frame 81 when assembled with the support frame 81 .

The board fixture 83 that has become the board fixing group 84 is aligned with the support frame 81 from below, and the two engaging claws 836 on the back side are fitted into the engaging holes 811b of the support frame 81 . There is some play between the engaging claw 836 and the engaging hole 811b. It sits on top of part 818 . It is now temporarily fixed.

At this time, since the engaging claw 836 and the claw portion 838a of the mounting piece 838 are supported by the support frame 81, there is no fear of falling. Finally, the board fixing assembly 84 is fixed to the support frame 81 by aligning the screw pieces 837 and the screw holes of the support frame 81 and screwing them from below.

When removing the board fixing assembly 84 for maintenance, conversely, the screw is removed and the board fixture 83 is slightly pushed backward to pull the front mounting piece 838 side downward, and the claw portion 838a of the mounting piece 838 is pulled downward from the support frame 81. It can be easily removed by removing it from the reinforcing portion 818 and finally pulling out the engaging claw 836 from the engaging hole 811b.

The assembled third electrical component unit 8 is covered with an insulating sheet 85 as shown in FIG. Also, the substrate fixing assembly 84 is attached to the right side of the support frame 81 , so that a gap 86 is provided between the substrate fixing assembly 84 and the electrical component partition plate 52 .

The duct 651 of the first electrical component unit 6 described above is arranged in this gap 86 . By arranging the board fixing assembly 84 and the duct 651 side by side in this manner, the height of the electrical component unit 5 can be further reduced, and the height of the housing 11 can be further reduced.

As described above, the substrate fixing assembly is provided with the U-shaped support frame 81 bridged by the electrical part partition plate 53, and the top substrate 82 and the substrate fixture 83 supporting the top substrate 82 are integrated with the support frame 81. By attaching 84, it becomes possible to provide an electrical component (capacitor 821) in the upper part of the housing 11 as well.

Further, by providing the substrate fixing assembly 84 on the upper portion of the housing 11, the height of the housing 11 can be reduced. Also, the substrate fixing assembly 84 is attached to the right side of the support frame 81 so that a gap 86 is provided between the substrate fixing assembly 84 and the electrical component partition plate 52 .

A duct 651 of the first electrical component unit 6 is arranged in this gap 86 . By arranging the board fixing assembly 84 and the duct 651 side by side, the height of the electrical component unit 5 can be further reduced, and the height of the housing 11 can be further reduced. Furthermore, since the substrate fixing assembly 84 is detachable, the top substrate 82 can be removed from below, which improves the workability of maintenance.

By the way, in the above embodiment, the first electrical component unit 6 is attached to the electrical part partition plate 52, but as shown in FIG. ), and the inverter board 611 is arranged on the rear end side (back side) of the electrical part partition plate 52 when viewed from the second electrical component unit 7 on the service panel 13 side.

During maintenance of the electrical component unit 5, the service panel 13 is removed, the second electrical component unit 7 is opened toward the outside of the housing 11 (the front side of the paper surface of FIG. 1), and the inside of the electrical component unit 5 is inspected. However, since the inverter board 611 is arranged in a deep place on the rear end side of the electrical part partition plate 52, the visibility of the inverter board 611 is poor. When removing using a tool, the workability is difficult.

Therefore, another embodiment for improving this point will be described with reference to FIGS. is used.

In this alternative embodiment, the electrical component partition plate 52 includes a first electrical component partition plate 52a on the front end side when viewed from the second electrical component unit 7 on the service panel 13 side, and a second electrical component partition plate on the rear end side. The second electrical component part partition plate 52b on the rear end side is bent at a predetermined angle with respect to the first electrical component part partition plate 52a on the front end side. With reference to FIG. 16(b), the bending angle θ of the second electrical component part partition plate 52b with respect to the first electrical component part partition plate 52a is calculated by It is the angle measured clockwise from the reference plane.

That is, the first electrical component part partition plate 52a on the front end side is substantially parallel to the side surface of the housing 11 (the right side surface in FIG. 1), but the second electrical component part partition plate 52b on the rear end side is parallel to the side surface of the housing 11 ( 1, the first electrical component part partition plate 52a and the second electrical component part partition plate 52b have a dogleg shape in plan view.

In this example, the bending angle θ of the second electrical component part partition plate 52b with respect to the first electrical component part partition plate 52a is set to 40 degrees in order to improve the visibility and workability of the inverter board 611. The same effect can be obtained within the range of degrees.

5, the lower partition plate 24 has a first partition surface 241 on the front side parallel to the side surface of the housing 11 and a heat exchanger mounting plate 183 parallel to the rear surface of the housing 11 on the rear side. and a third partition surface 243 connecting the first partition surface 241 and the second partition surface 242 with an inclined surface. It is preferable that the first partition surface 241 and the second electrical part partition plate 52 b are substantially flush with the third partition surface 243 .

In this way, by tilting the second electrical component partition plate 52b on the rear end side toward the side surface (the right side surface in FIG. 1) of the housing 11, the inverter board 611 arranged on the second electrical component partition plate 52b The visibility of the parts is improved, and maintenance can be performed with good workability, such as being able to easily approach the parts without worrying about other peripheral parts.

As in the previous embodiment, the fan motor drive board 62 is arranged on the first electrical part partition plate 52a side, but the present invention is not limited to this board arrangement. The inverter board 611 may be arranged on the partition plate 52a side, and the fan motor drive board 62 may be arranged on the second electrical part partition plate 52b side.

As described above, the electrical component unit 5 includes various electrical components such as the heat sinks 631, 632, 633, the inverter board 611, and the capacitor 821. The frame of the electrical component unit 5 is made of steel plates. The weight is about 15 kg due to the formation. Therefore, it is not easy to lift and transport the electrical component unit 5 .

Therefore, in order to facilitate carrying of the electrical component unit 5, as a preferred embodiment of the present invention, as shown in FIGS. A handle 510 is provided. The handle 510 may have a general shape consisting of a band plate having screwing pieces 512, 512 facing outward at both ends of a U-shaped grip portion 511, and may be made of either sheet metal or synthetic resin. There may be.

In FIG. 15, the handle 510 is arranged in a vacant upper right portion of the electrical part partition plate 52, which is obliquely upper right of the inverter board 611 in this example, above the air intake port 59. As shown in FIG. Handle 510 may be mounted vertically or horizontally, but is preferably tilted about 45 degrees. The direction of inclination may be upward to the right (downward to the left) or downward to the right (upward to the left).

According to this, as shown in FIG. 17, by gripping the handle 510 with one hand and supporting the lower portion of the heat sink 631 (see FIG. 10) with the other hand, the heavy electrical component unit 5 can be held. can be carried around.

In this example, the handle 510 is provided on the side of the second electrical component partition plate 52b of the electrical component partition plate 52. A flat plate having no bent portion may be used.

Next, referring to FIG. 5, in the previous embodiment, when the electrical component unit 5 is placed on the lower partition plate 24, the lower end of the electrical component partition plate 52 is used as the rail surface 58, and the lower partition plate 24 is A rail receiving portion 251 for the rail surface 58 is formed on the upper end of the first partition surface 241 , and the electrical component unit 5 is moved along the rail receiving portion 251 so as to be placed on the lower partition plate 24 . However, since the width of the rail receiving portion 251 is narrow, there is a problem with stability during movement.

To solve this problem, as shown in FIG. 18, a receiving plate 270 is provided at the upper end of the lower partition plate 24 so that the electrical component unit 5 can be stably moved to its fixed position.

As described above, the lower partition plate 24 is fixed to the first partition surface 241 on the front side parallel to the side surface of the housing 11 and the heat exchanger mounting plate 183 parallel to the rear surface of the housing 11. It has a second partition surface 242 and a third partition surface 243 connecting between the first partition surface 241 and the second partition surface 242 .

The receiving plate 270 has the first partitioning surface 241, the third partitioning surface 243 and the second partitioning surface 241, the third partitioning surface 243 and the second partitioning surface 241. 242, and a first flange 271 is formed on the oblique side thereof so as to be bent upward.

In the embodiment here, the electrical component unit 5 has the electrical component part partition plate 52, as described with reference to FIG. 52b, and the second electrical component partition plate 52b is bent at a predetermined angle with respect to the first electrical component partition plate 52a. A second flange 52c is provided which is bent and erected toward the blower chamber FR side.

According to this, as shown in FIG. 19A, the electrical component unit 5 is lifted, placed on the receiving plate 270 at the rear end of the second electrical component partition plate 52b, and moved along the first flange 271 in the direction of the arrow A. 19(b), the electrical component unit 5 can be stably guided to the fixed position shown in FIG. 19(b).

As described above, the second electrical component unit 7 is supported by the support column 55 of the first electrical component unit 6 so as to be openable and closable. (on the front side of the paper) can be opened up to, for example, about 90°.

Referring to FIG. 16 again, a predetermined electrical wiring W (three-phase power line in this example) is laid between the first electrical component unit 6 and the second electrical component unit 7 . As the air-conditioning capacity is improved, the drive current value of the compressor and the like is also increased. If the wiring becomes thicker, it becomes difficult to route it, and this also hinders the opening and closing of the second electrical component unit 7 .

Therefore, the power line W is set to a sufficient length longer than the length required when the second electrical component unit 7 is opened to the maximum, and the surplus length of the power line W is set above the board fixing plate 71 of the second electrical component unit 7. A wiring storage section 75 for storing the wiring is provided.

Also referring to FIG. 20, the wiring housing portion 75 is formed in a substantially box-like shape so as to protrude toward the service panel 13 side. The wiring housing portion 75 may be formed integrally with the substrate fixing plate 71, or may be formed separately and attached to the substrate fixing plate 71 by screws, welding, or the like.

Preferably, as shown in FIG. 16, a wire hanger 752 is provided in the wire housing portion 75, and the surplus length of the power wire W is looped and passed through the wire hanger 752 a plurality of times to be held. In this example, the wire hanger 752 is an annular body, but a hook-shaped hanger can also be used.

According to this, even if the power wire W has a large wire diameter, it can be routed compactly and easily between the first electrical component unit 6 and the second electrical component unit 7 . The electric wiring W may be a signal line and is not limited to a power line.

Next, the improved heat dissipation path of the second electrical component unit 7 will be described with reference to FIGS. 20 and 21. FIG. 20 and 21 are perspective views of the electrical component unit 5 viewed from below the service panel 13 side.

On both sides of the substrate fixing plate 71 of the second electrical component unit 7, many components for air conditioning control are mounted, and the heat-generating components included therein are mounted on the front surface of the substrate fixing plate 71 (the surface on the service panel 13 side). ) side, part of the air taken into the electrical component unit 5 from the outside air intake port 141 (see FIG. 1) of the rear panel 14 is made to flow more easily to the front side of the substrate fixing plate 71 . There is a need to cool heat-generating components more effectively.

As described above, the upper portion of the electrical component partition plate 52 (second electrical component partition plate 52b) of the first electrical component unit 6 is provided with a ventilation port 532 for discharging cooling air from the reactor 613 to the fan chamber FR side. is formed.

Using this air vent 532 as a first air vent, a second air vent is provided in the upper part of the board fixing plate 71 of the second electrical component unit 7 for improving air flow on the front side of the board fixing plate 71 . The second vent may be a simple opening in the substrate fixing plate 71 , but in this embodiment, the second vent 751 is provided at the bottom of the wiring housing portion 75 .

As a result, as indicated by an arrow B in FIG. 21, a heat radiation path is formed to improve the flow of cooling air from the front surface of the substrate fixing plate 71 to the first ventilation port 532 through the second ventilation port 751, thereby fixing the substrate. Heat-generating components provided on the front side of the plate 71 can be cooled more effectively.

When the second electrical component unit 7 is incorporated into the electrical component unit 5 , the hinge piece 714 of the second electrical component unit 7 is engaged with the hinge slit 551 provided in the post 55 of the first electrical component unit 6 . However, in that case, the second vent 751 can be used as a handle for carrying the second electrical component unit 7 .

1: outdoor unit, 11: housing, 12: pipe cover, 13: service panel, 14: rear panel, 141: outside air intake, 15: bottom plate, 16: top plate, 18: heat exchanger,
20: Motor, 21: Blower fan, 24: Lower partition plate, 25: Receiving part, 351: Rail receiving part, 251a: Extension part for stopper, 26: Upper partition plate, 264: Insertion claw, 270: Receiving plate , 271: first flange,
30: Front panel 4: Refrigerant circuit component, 40: Accumulator, 43: Refrigerant piping, 45: Piping housing, 46: First cable, 47: Second cable,
5: Electrical component unit 510: Handle 52: Electrical part partition plate 53: Mounting surface 54: Fixing surface 541: Corner 55: Post 551: Hinge slit 56: Corner fixing plate 57 : stopper, 58: rail surface, 581: rail guide portion, 59: air intake, 591: ventilation hole,
6: First electrical component unit, 61: Mounting base, 611: Inverter board, 62: Fan motor drive board, 621: First connector, 622: Second connector, 631: Heat sink, 64: Waterproof cover, 651: Duct , 652: wind guide cover,
7: second electrical component unit, 71: substrate fixing plate, 73: opening, 74: connector relay portion, 741: relay connector, 75: wiring housing portion,
8: Third electrical component unit, 81: Support frame, 82: Top board, 83: Board fixture, 84: Board fixing assembly, 85: Insulating sheet, 86: Gap MR: Machine room, FR: Fan room

Claims (3)

It has a rectangular parallelepiped housing, and the interior of the housing is divided into a blower room and a machine room by a lower partition plate and an electrical part partition plate placed on the lower partition plate, and the blower room includes a blower fan and a machine room. A heat exchanger is arranged, an electrical component unit is arranged in the upper part of the machine room, and refrigerant circuit parts including an accumulator and refrigerant pipes are arranged in the lower part, and a service panel covering the electrical component unit is part of the housing. In an outdoor unit of an air conditioner that is detachably installed,
The electrical component unit includes a first electrical component unit in which an electrical component is attached to the electrical component part partition plate, and one end of which is pivotally supported at a front end of the first electrical component unit and can be opened and closed with respect to the first electrical component unit. a second electrical component unit having a board fixing plate; and electrical wiring that spans between the first electrical component unit and the second electrical component unit,
The board fixing plate of the second electrical component unit is provided with a box-shaped wiring storage section for storing the excess length of the electrical wiring so as to protrude toward the service panel. A ring-shaped wire hanger having an insertion hole through which the electric wire is inserted is provided in the unit, and the wire hanger has the through hole facing the electrical component part partition plate of the first electrical component unit. An outdoor unit of an air conditioner, characterized in that it is arranged as follows . 2. The outdoor air conditioner according to claim 1, wherein the electrical wiring is inserted into the wiring hook a plurality of times, and the excess length of the electrical wiring is stored in a ring shape. machine. 2. The outdoor of the air conditioner according to claim 1, wherein the wiring housing portion is formed with a vent hole for improving the passage of air on the front side of the board fixing plate facing the service panel. machine.

Images