JP2020159668A - Outdoor equipment of air conditioner - Google Patents

Abstract

To take effective fire spread prevention measures for an electric component unit arranged within a machine room of outdoor equipment of an air conditioner.SOLUTION: In outdoor equipment of an air conditioner, the inside of a housing is divided into a blower chamber and a machine room having an electric component storage part by a partition plate. An electric component unit including a specific electric component unit having a circuit board equipped with an exothermic electric component is provided within the electric component storage part. A barrier tray 9 for receiving a fallen object from exothermic electric components 821 and 822 is arranged below a specific electric component unit 8.SELECTED DRAWING: Figure 22

Description

The present invention relates to an outdoor unit of an air conditioner, and more specifically to a structure of an electrical component unit provided in the outdoor unit.

A multi-room type air conditioner in which one outdoor unit installed outdoors and one or more indoor units installed in an air-conditioning room are connected via a refrigerant pipe is known. Inside the outdoor unit, a partition plate attached to the bottom plate that forms part of the housing of the outdoor unit installs a machine room equipped with a compressor, accumulator, piping, etc., and a heat exchanger, blower fan, etc. It is divided into a blower room.

An electrical component storage unit is provided in the upper part of the machine room, and an electrical component unit equipped with a power supply device that supplies drive power to devices such as a compressor and a blower fan and a control board that controls the operation of the outdoor unit is provided. Be placed.

For example, in the outdoor unit described in Patent Documents 1 and 2, as the electrical component unit, a first electrical component unit in which a predetermined electrical component is mounted on the electrical component partition plate arranged above the partition plate and a service. On the panel side, the front end of the first electrical component unit is provided with a second electrical component unit in which a predetermined electrical component is mounted on a mounting board supported so as to be openable and closable in a door shape.

Among the above-mentioned multi-room air conditioners, especially large-scale models such as multi-air conditioners for buildings (VRF) require a large amount of electric power, so that the number of electric parts for that purpose also increases.

Therefore, a third electrical component unit is newly placed above the electrical component storage unit that houses the electrical component unit, and the third electrical component unit is provided with, for example, an electrolytic capacitor or a resistor that constitutes a rectifier circuit for preventing inrush current. It is being implemented.

Although the electrolytic capacitors are explosion-proof, in many cases the internal electrolyte is flammable. Since many combustible materials such as heat insulating materials and sound absorbing materials are present in the machine room, it is important to take measures to prevent the spread of fire in case the electrolytic capacitor ignites for some reason.

In conventional air conditioners, fire spread is prevented by securing a distance from an ignition source such as an electrolytic capacitor to combustibles, but since the space space in the electrical component storage is limited, fire spread prevention It is difficult to secure a sufficient distance for use. In addition, the combustion of the substrate may cause mounted parts such as electrolytic capacitors and resistors to fall and spread the fire. In addition, dropping the mounted components may damage other electrical components and the board.

Japanese Unexamined Patent Publication No. 2012-159222 Japanese Unexamined Patent Publication No. 2013-50255

Therefore, an object of the present invention is to take effective fire spread prevention measures for the electrical component unit arranged in the machine room of the outdoor unit of the air conditioner.

In order to solve the above-mentioned problems, in the present invention, the inside of the housing is divided into a blower room and a machine room having an electrical component storage section by a partition plate, and heat-generating electricity is generated in the circuit board in the electrical component storage section. In an outdoor unit of an air conditioner having an electrical component unit including a specific electrical component unit on which components are mounted.
It is characterized in that a barrier tray for receiving falling objects from the heat-generating electrical components is arranged below the specific electrical component unit.

The heat-generating electric component includes a strong heat-generating electric component having a large heat-generating energy and a weak heat-generating electric component having a small heat-generating energy, and the barrier tray corresponds to the strong heat-generating electric component. It has one region and a second region corresponding to the weakly heat-generating electrical component, and the distance between the first region and the specific electrical component unit is larger than the distance between the second region and the specific electrical component unit. An inclined surface for guiding the falling object is formed from the second region to the first region.

It is preferable that a ventilation hole is provided at a predetermined portion of the barrier tray except directly under the heat-generating electric component.

According to the present invention, by arranging the barrier tray below the specific electrical component unit, it is possible to catch a falling object from a heat-generating electric component, and it is possible to prevent fire spread or damage to peripheral members.

The front side perspective view which shows one Embodiment of the outdoor unit of the air conditioner according to this invention. The rear 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. An enlarged perspective view showing an electrical component unit included in the outdoor unit of the air conditioner. The perspective view which shows each part of the lower partition plate and the electrical part partition plate of the said electrical component unit. The perspective view which shows the mounting state of the said electrical component unit. The perspective view which shows the partition plate of the electrical part. An exploded perspective view showing the electrical component unit. The perspective view which shows the frame of the said electrical component unit. (A) Left side perspective view and (b) Exploded view showing the first electrical component unit included in the electrical component unit. FIG. 8 is a partial cross-sectional view taken along the line AA of FIG. Right side perspective view showing the inside of the electrical component unit. The perspective view which shows the top board and the board fixture provided in the electrical component unit separately. The perspective view which shows the assembly method of the 3rd electrical component unit included in the said electrical component unit. The perspective view which shows another embodiment of the electrical part partition plate of the said electrical component unit. (A) A perspective view showing an upper portion of another embodiment of the electrical component partition plate, and (a) a schematic view illustrating a bending angle of the second electrical component partition plate with respect to the first electrical component partition plate. A schematic perspective view showing a state in which the electrical component unit is lifted by using a handle provided inside the unit. As a preferred embodiment of the present invention, a perspective view of a main part showing an example in which a receiving plate of an electrical component unit is provided at the upper end of a lower partition plate. (A), (b) Explanatory drawing which shows the state which moves the electrical component unit to a fixed position using the said receiving plate as a guide. The perspective view which shows the embodiment which has the improved heat dissipation path of the 2nd electrical component unit included in the electrical component unit. FIG. 20 is a perspective view in which the flow direction of the cooling air is written. A side view showing a third electrical component unit to which a barrier tray (integrated type) is attached. The perspective view which shows the said barrier tray (integrated type). (A) plan view and (b) bottom view of the barrier tray (integrated type). The perspective view which shows the barrier tray (divided type) of another aspect. An exploded perspective view showing the barrier tray (divided type). The enlarged perspective view which shows the preferable male side of the fitting means applied to the said barrier tray (split type). The back side perspective view of the barrier tray (split type). The perspective view explaining the attachment method to the 3rd electrical component unit of the said barrier tray (split type). A partially enlarged perspective view showing a mounting portion of the main tray, and (b) a partially enlarged perspective view showing a state in which the engaging portion of the sub tray is hooked on a handle. The side view which shows the said barrier tray (split type) attached to the 3rd electrical component unit.

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

The outdoor unit of the air conditioner according to the present invention is installed outdoors and is connected to one or more indoor units installed in the air conditioning room via a refrigerant pipe.

First, referring to FIGS. 1 and 2, the outdoor unit 1 of the air conditioner according to this embodiment (hereinafter, simply referred to as the outdoor unit 1) has a housing 11 having a substantially rectangular parallelepiped shape. In the rectangular parallelepiped housing 11, the upper surface side is the upper surface or the upper surface, the upper surface facing surface is the bottom surface or the lower surface, the surface having the air outlet 31 described later is the front surface or the front surface, the front surface facing surface is the back surface side or the rear surface, and the outside air intake described later. The surface with the inlet 141 will be described below as the right side surface or the right side, and the surface facing the right side surface as the left side surface or the left side. The same applies to each part.

The outer shell of the housing 11 is mainly made of steel plate, and the front surface and the left side surface of the housing 11 are covered with the front panel 30. Air outlets 31 opened in a circular shape in accordance with the blower fan 21, which will be described later, are provided at two upper and lower positions on the front surface of the front panel 30.

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

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

Further, the back surface side of the right side surface of the housing 11 and a part of the back surface are covered with the back panel 14. At the lower part of the right side surface of the back panel 14, a plurality of horizontally elongated hole-shaped outside air intake ports 141 for taking in outside air into the electrical component unit 5 described later are provided.

The front panel 30, the piping cover 12, and the back panel 14 are assembled by screwing to the bottom plate 15 having the legs 151 which is the bottom surface of the housing 11 and supports the housing 11, and the front panel 30, the service panel 13, and the back 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 back panel 14 by screwing. In FIG. 1, the upper part of the service panel 13 is cut out to show the internal electrical component unit 5.

As shown in FIG. 3, the inside of the housing 11 is erected on the bottom plate 15, the right end of the front panel 30 is screwed, and the bottom plate 15 is parallel to the side surface of the housing 11 and the electrical component partition plate 52 described later. The blower room FR on the front panel 30 side and the machine room MR on the service panel 13 side are provided by the lower partition plate 24 having a height up to the lower end and the electrical component partition plate 52 mounted on the front side of the lower partition plate 24. It is divided into. Further, a back partition plate 26, which will be described later, is arranged on the back surface side of the lower partition plate 24.

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

Further, in the blower chamber FR, a heat exchanger 18 having an L-shape in top view is arranged from the left side surface to the back surface. The heat exchanger 18 includes a plurality of fins 181 arranged in parallel and a heat transfer tube 182 arranged in a meandering shape so as to be orthogonal to the fins 181.

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

Returning to FIG. 3, the machine room MR is provided with an electrical component storage unit 50 in which the electrical component unit 5 is arranged at the upper part, and an accumulator 40, a compressor 41, a four-way valve 42, and a refrigerant pipe 43 at the lower part. A refrigerant circuit component 4 such as an expansion valve 44 is arranged.

With the above configuration, the outdoor unit 1 of the air conditioner transfers the heat of the high-temperature and high-pressure refrigerant flowing inside the heat transfer tube 182 of the heat exchanger 18 from the heat transfer tube 182 to the fins 181 during cooling operation, for example. The fins 181 radiate heat to the air sucked from the suction port 33 and the rear suction port 22 by the blower fan 21, or absorb heat from the sucked air to exchange heat.

As shown in FIG. 4, the heat exchanger 18 includes a heat exchanger mounting plate 183 that surrounds the right end of the heat exchanger 18. The heat exchanger mounting plate 183 has a plurality of holes, through which the heat transfer tube 182 penetrates and is connected to another heat transfer tube 182 and the refrigerant pipe 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 a right angle to the heat exchanger 18 side to form a heat exchange angle portion 185. The lower partition plate 24 and the back partition plate 26, which will be described later, are assembled and screwed to the heat exchanger mounting plate 183 and the heat exchange angle portion 185.

With reference to FIG. 5, the lower partition plate 24 is formed in the housing 11 along with the refrigerant circuit components 4 (accumulator 40, compressor 41, refrigerant pipe 43, etc.) arranged inside the machine room MR. The first partition surface 241 on the front side parallel to the side surface, the 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 It has a third partition surface 243 that connects the partition surfaces 242 with an inclined surface.

The lower partition plate 24 is provided with a lower front flange portion 244 bent toward the MR side of the machine room at its front end. Further, the lower partition plate 24 is provided with a receiving portion 25 bent toward the MR side of the machine room at the upper end thereof.

The receiving portion 25 located on the first partition surface 241 is a rail receiving portion 251. At the end of the rail receiving portion 251 on the third partition surface 243 side, a stopper extending portion 251a partially extending to the machine room MR side is provided at a position where the stopper 57, which will be described later, stops.

A back partition plate 26 is provided above the second partition surface 242 of the lower partition plate 24. The right end of the back partition plate 26 is bent toward the back side and screwed to the heat exchanger mounting plate 183. The left end of the back partition plate 26 is fixed to the electrical component partition plate 52.

At the lower end of the back partition plate 26, fixed pieces 262 and 263 formed by being bent so as to come into contact with the receiving portion 25 of the lower partition plate 24 are provided. With reference to FIG. 6, an insertion claw 264 that gradually rises toward the blower chamber FR direction is provided on the upper left portion of the back partition plate 26. A fixture 265 extending inward is provided on the upper right portion of the back partition plate 26.

As shown in FIGS. 5 and 7, the electrical component partition plate 52 is perpendicular to the mounting surface 53 located on the first partition surface 241 of the lower partition plate 24 obtained by bending the steel plate and from the back side of the mounting surface 53. A corner portion 541 that is bent at a right angle, a fixing surface 54 that extends from the corner portion 541 to the back partition plate 26 and is fixed to the back partition plate 26, and a strut mounting portion 521 that is bent in multiple steps from the front end of the mounting surface 53 and becomes a recess. The upper front flange portion 522, which is flush with the lower front flange portion 244 on the front surface of the support column mounting portion 521, is provided.

The electrical component partition plate 52 is further fixed to the inside of the column mounting portion 521 and the right side is connected to the column 55 protruding from the upper front flange portion 244, and the mounting surface 53 and the lower end corner portion of the fixing surface 54 are connected, and the tip is formed. A corner fixing plate 56 that abuts the receiving portion 25 of the third partition surface 243 with the bent piece 561 that is bent downward is provided.

The lower end of the mounting surface 53 is a rail surface 58 bent toward the FR side of the blower chamber. The rail surface 58 includes a rail guide portion 581 that is bent downward. Further, a stopper 57 extending downward from the rail surface 58 is provided at the lower part 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. The front guide portion 523 is provided.

The left-right width W1 from the inside of the rail guide portion 581 to the inside of the front guide portion 523 is the same as the left-right width of the rail receiving portion 251 of the lower partition plate 24. Further, the left-right width W2 of the rail surface 58 is the same as the left-right width of the stopper extending portion 251a.

As a result, the extension portion 251a for the stopper is regulated between the rail guide portion 581 and the stopper 57, and the receiving portion 251 for the rail 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 is such that the first electrical component unit 6 including the electrical components attached to the electrical component partition plate 52 and one end are supported by the front end of the first electrical component unit 6. , Along the upper surface of the housing 11 mounted on the second electrical component unit 7 arranged on the service panel 13 side and orthogonal to the first electrical component unit 6, the first electrical component unit 6 and the second electrical component unit 7. It is formed by a third electrical component unit 8 arranged in a row.

By assembling the 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 each other at a substantially right angle, a rectangular parallelepiped shape is formed inside the electrical component unit 5 shown in FIG. Space is formed.

This space serves as a pipe accommodating portion 45, and a part of the refrigerant circuit component 4 arranged in the machine room MR shown in FIGS. 3 and 6, specifically, the expansion valve 44, the accumulator 40, and the upper part of the refrigerant pipe 43. It can be accommodated. As a result, the height of the housing 11 can be made low, and the outdoor unit 1 becomes compact.

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

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

Further, referring to FIGS. 13 and 14, a board fixing group 84 including a top board (circuit board) 82 is detachably attached to the support frame 81 of the third electrical component unit 8, and the board fixing group 84 is attached. Electrical components can be provided on the top board 82. As a result, it becomes possible to sufficiently arrange a large-sized board and power supply components due to the increase in capacity.

The support frame 81 of the third electrical component unit 8 is a frame having a U-shaped cross section, which is formed of a steel plate and has reinforcing portions 817 and 818 bent inward above and below the support frame 81, respectively, as shown in FIG. It is bridged to both front and rear upper ends of the electrical component partition plate 52.

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

The rear arm portion 811 is provided with an insertion claw hole 811a at a position facing the insertion claw 264 of the back partition plate 26, and a rear attachment 814 bent to the back side at a position facing the fixture 265. Has been done. Engagement holes 811b are provided at two positions on the left and right of the rear mounting tool 814.

Further, at the front portion of the right arm portion 812, there is a right attachment 815 bent to the right. The front arm portion 813 has a crank-shaped front attachment 816 that is bent from the front surface of the front arm portion 813 along the bottom surface and further bent downward. A part of the front mounting tool 816 bends further forward to become a hooking claw 816a.

With reference to FIG. 7, the above-mentioned support column 55 has a height from the lower end of the electrical component partition plate 52 to the bottom of the support frame 81, and on the front side of the support column 55, there are two upper and lower hinges It is provided with a slit 551. The hinge slit 551 is provided with a long groove 552 upward at the upper end on the left side and a long groove 553 downward at the lower end on the right side.

The board fixing plate 71 is formed of a steel plate and is formed from a mounting surface 710 parallel to the front surface of the housing 11, a terminal block mounting surface 711 tilting forward from the lower part of the mounting surface 710, and a mounting surface 710 and a terminal block mounting surface 711. An inclined surface 712 inclined to the left front is provided.

At the left end of the inclined surface 712, a hinge surface 713 parallel to the front surface and a hinge piece 714 project from the end of the hinge surface 713 to the left side at two positions above and below at a position facing the hinge slit 551 of the support column 55. It is provided as follows.

The substrate fixing plate 71 has an opening 73 cut out from the hinge surface 713 to the inclined surface 712. The opening 73 has a height of about half the height of the substrate fixing plate 71, and is largely opened at a position at the center of the top and bottom 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. The relay connector 741 is fitted in the connector relay unit 74.

Further, the right end of the mounting surface 710 of the board fixing plate 71 and the terminal block mounting surface 711 becomes a flange portion 716 that is bent rearward and further to the right to be fixed to the back panel 14. Further, it has a locking hole 715 at the upper end of the mounting surface 710.

In the board mounting plate 71, the hinge piece 714 is inserted into the groove 552 of the hinge slit 551 of the support column 55 from the front and the mounting surface 710 is moved rearward, so that the hinge piece 714 fits into the groove 553 of the hinge slit 551. It fits. As a result, 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.

Next, the hooking claw 816a of the front mounting tool 816 of the support frame 81 is hooked on 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 mounting tool 816 are screwed. As a result, the framework of the electrical component unit 5 is assembled.

The electrical component unit 5 is provided with various electrical components such as heat sinks 631, 632, 633, an inverter board 611, and an electrolytic capacitor 821, which will be described later, and the electrical component unit 5 itself is made of steel plate. It weighs about 15 kg.

In order to easily place this on the lower partition plate 24, first, as shown in FIG. 6, the electrical component unit 5 is raised to the height of the lower partition plate 24. Next, the rail surface 58 is placed on the rail receiving portion 251 so as to sandwich 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. Put it on.

Then, the electrical component unit 5 is slid backward. If it 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 extension 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 by preventing it from being displaced in the left-right direction.

Further, as the electrical component unit 5 moves, the insertion claw 264 of the back partition plate 26 fits into the insertion claw hole 811a of the support frame portion 81, so that the upper end of the electrical component unit 5 is also temporarily fixed.

The temporarily fixed electrical component unit 5 screws the rear mounting tool 814 of the support frame 81 and the fixing tool 265 of the back partition plate 26. Then, the electrical component unit 5 is fixed to the machine room MR by screwing the right mounting tool 815 of the support frame 81 and the flange 716 of the board mounting plate 71 to the back 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, the 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). The boards 62 are arranged one above the other, and the diode bridge 614 is arranged on the fan motor drive board 62. Both are substrates and heat-generating components on which heat-generating elements are mounted.

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

In the heat sinks 631, 632, and 633, a plurality of heat radiating fins 63a are arranged one above the other, and a ventilation passage 632 is formed so that the air K1 described later flows laterally.

A reactor 613, which is a heat generating component, is provided on the inverter board 611, and the reactor 613 is covered with a duct 651 in which the front side and the back side are opened and bent in a U shape, and is covered with the electrical component partition plate 52. The mounting base 61 has a ventilation port 532 in accordance with the reactor 613. On the FR side of the blower chamber of the electrical component partition plate 52, a water-impervious lid 64 having a plurality of horizontally long slit-shaped ventilation holes 641 that covers the ventilation port 532 and has an eaves on the upper part is provided.

The mounting surface 53 of the electrical component partition plate 52 is provided with an air intake port 59 between the corner portion 541 (the back side of the electrical component partition plate) and the one end side of the heat sink 631. The air intake port 59 is composed of a plurality of vertically elongated slit-shaped ventilation holes 591 that are pressed toward the back side and inclined toward the MR side of the machine room. In this example, the air intake ports 59 are provided in five rows horizontally and two steps vertically. There is.

The mounting base 61 is provided with a ventilation guide portion 617 around the air intake port 59, which projects toward the MR side of the machine room and guides the air K1 to the air intake port 59. The opening in the ventilation guide portion 617 becomes the air inlet 615.

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

Next, the flow of air in the electrical component unit 5 will be described. The air pulled by the blower fan 21 and flowing in from the outside air intake port 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 impermeable lid 64 from the duct 651. The air K2 flows directly from the ventilation hole 641 toward the blower fan 21 and into the blower room FR.

Further, the air K1 which is a part of the air enters the air inlet 615 of the mounting base 61 and flows into the air guide cover 652 from the air intake port 59 along the protruding ventilation guide portion 617 of the mounting base 61. Along the air guide surface 653 of the air guide cover 652, the heat sink 631 is cooled through the ventilation passage 63b of the heat sink 631, and reaches the blower chamber FR from the air outlet 654.

By providing the air guide cover 652 that allows the air before heat exchange to flow directly to the heat sink 631, the substrate and heat generating parts on which the heat generating element mounted on the heat sink 631 is mounted can be efficiently cooled. Further, a triple water-impervious structure is formed by a wind guide cover 652, a vertically long slit-shaped ventilation hole 591 inclined toward the MR side of the machine room, and a ventilation guide portion 617 covering a part of the air intake port 59. It is possible to reliably prevent the intrusion of water from the blower FR chamber.

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

As described above, the first electrical component unit 6 includes two fan motor drive boards 62 arranged vertically in front of the mounting base 61 (closer to the service panel 13 side). Each fan motor drive board 62 is provided with a first connector 621 and a second connector 622. The first connector 621 is connected to the first cable 46 that drives the fan motor 20, and the second connector 622 is connected to 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 (closer to the service panel 13 side), and as shown in FIGS. 4 and 12, the first connector 621 is formed from the opening 73 of the second electrical component unit 7. It is visually recognized.

With reference to FIG. 3, the first cable 46 and the second cable 47 connected to the fan motor 20 enter the machine room MR from the outlet 245 on the first partition surface 241 of the lower partition plate 24. There is a connector 461 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 from the opening 73.

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

As a result, the first cable 46 and the second cable 47 can be connected and maintained without opening the second electrical component unit 7 of the electrical component unit 5, and workability is improved.

In the third electrical component unit 8, as shown in FIG. 13, the top substrate 82 is fixed to the substrate fixture 83 to form the substrate fixing group 84 shown in FIG. 14, and the substrate fixing assembly 84 is downward with respect to the support frame 81. Can be installed from.

The top substrate 82 has an electrolytic 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 that surrounds the top substrate 82. The fixed frame 831 supports the top substrate 82 by a substrate support portion 832 provided in an edge shape on the inner lower portion of the fixed frame 831.

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

The distance from the upper surface of the substrate support portion 832 to the lower end of the protruding piece 833 and the locking claw 834 is substantially the same as the thickness of the plate body of the top substrate 82. Under the board fixture 83, two beams 835 for reinforcing the fixing frame 831 so as not to come into contact with the electrolytic capacitor 821 are provided. The protruding 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, the long side on the right side is fitted between the substrate support portion 832 and the protruding piece 833, and then the top substrate 82 is locked with the locking claw 834. It is fixed by fitting it so that it is located underneath.

With reference to FIG. 8, the substrate fixture 83 has two engaging claws 836 and 836 protruding to the rear side to the outside of the fixing frame 831 located on one short side (rear side) of the top substrate 82. It is provided.

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

The mounting piece 838 has a claw portion 838a that rests on the reinforcing portion 818 of the support frame 81 when assembled with the support frame 81. Further, a screw piece 837 located under the support frame 81 when assembled with the support frame 81 is provided between the mounting pieces 838 and 838.

The board fixing tool 83, which is the board fixing set 84, is aligned with the support frame 81 from below, and 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, and when the board fixture 83 is pushed slightly backward and the front mounting piece 838 side is pushed upward, the claw portion 838a of the mounting piece 838 reinforces the support frame 81. Placed on part 818. This will temporarily fix it.

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 risk of falling. Finally, the substrate fixing assembly 84 is fixed to the support frame 81 by aligning the screw holes of the screw piece 837 and the support frame 81 and screwing them from below.

When removing the board fixing assembly 84 for maintenance, on the contrary, remove the screws, push the board fixing tool 83 slightly backward, pull the front mounting piece 838 side downward, and pull the claw portion 838a of the mounting piece 838 downward to the support frame 81. It can be easily removed by removing it from the reinforcing portion 818 of the above, and finally pulling out the engaging claw 836 from the engaging hole 811b.

The assembled third electrical component unit 8 is covered with the insulating sheet 85 as shown in FIG. Further, 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 partition plate 52 of the electrical component portion.

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

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

Further, by providing the board fixing assembly 84 on the upper part of the housing 11, the height of the housing 11 can be lowered. Further, 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 partition plate 52 of the electrical component portion.

The duct 651 of the first electrical component unit 6 is arranged in this gap 86. As a result, the height of the electrical component unit 5 can be further lowered by arranging the substrate fixing assembly 84 and the duct 651 side by side, and by extension, the height of the housing 11 can be lowered. Further, since the board fixing assembly 84 is removable, the top board 82 can be removed from below, and maintenance workability is improved.

By the way, in the above embodiment, the first electrical component unit 6 is attached to the electrical component partition plate 52, but as shown in FIG. 7, the electrical component partition plate 52 is the side surface of the housing 11 (the right side surface in FIG. 1). ), And the inverter board 611 is arranged on the rear end side (back side) when viewed from the second electrical component unit 7 on the service panel 13 side of the electrical component partition plate 52.

At the time of maintenance of the electrical component unit 5, the service panel 13 is removed, and the second electrical component unit 7 is opened toward the outside of the housing 11 (the front side of the paper in FIG. 1) to inspect the inside of the electrical component unit 5. However, in particular, since the inverter board 611 is arranged at a deep position on the rear end side of the electrical component partition plate 52, the visibility of the inverter board 611 is poor, and the inverter board 611 is screwed, for example, etc. When removing with the tool of, there is a difficulty in its workability.

Therefore, another embodiment for improving this point will be described with reference to FIGS. 15 and 16, but in these figures, the components that are substantially the same as those of the above-described embodiment have the same reference numerals. Is used.

In this other embodiment, the electrical component partition plate 52 includes a first electrical component partition plate 52a on the front end side and a second electrical component partition plate on the rear end side when viewed from the second electrical component unit 7 on the service panel 13 side. It is divided into 52b, and the second electrical component partition plate 52b on the rear end side is bent at a predetermined angle with respect to the first electrical component partition plate 52a on the front end side. With reference to FIG. 16B, the bending angle θ of the second electrical component partition plate 52b with respect to the first electrical component partition plate 52a is such that the surface including the first electrical component partition plate 52a is a reference plane of 0 degrees. It is an angle measured clockwise from the reference plane.

That is, the first electrical component 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), while the second electrical component partition plate 52b on the rear end side is the side surface of the housing 11 (the right side surface in FIG. 1). It is tilted toward the right side in FIG. 1) and exhibits a dogleg shape in a plan view of the first electrical component partition plate 52a and the second electrical component partition plate 52b.

In order to improve the visibility and workability of the inverter board 611, in this example, the bending angle θ of the second electrical component partition plate 52b with respect to the first electrical component partition plate 52a is 40 degrees, but it is 30 to 50. If it is within the range of degree, the same effect is achieved.

With reference to FIG. 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 back surface of the housing 11 on the back side. Since it has a second partition surface 242 fixed to the surface and a third partition surface 243 that connects the first partition surface 241 and the second partition surface 242 with an inclined surface, the first electrical component partition plate 52a is provided. It is preferable that the surface is substantially the same as the first partition surface 241 and the second electrical component partition plate 52b is substantially the same surface as 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 (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 inverter is improved, and the hands can be easily brought close to each other without worrying about other peripheral parts, so that maintenance can be performed with good workability.

As in the previous embodiment, the fan motor drive substrate 62 is arranged on the partition plate 52a side of the first electrical component portion, but the present invention is not limited to this substrate arrangement, for example, the first electrical component portion. 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 component partition plate 52b side.

As described above, various electrical components such as heat sinks 631, 632, 633, an inverter board 611, and an electrolytic capacitor 821 are attached to the electrical component unit 5, and the skeleton of the electrical component unit 5 is a steel plate. Because it is made of, it weighs as much as about 15 kg. Therefore, it is not easy to lift and transport the electrical component unit 5.

Therefore, in order to facilitate the carrying of the electrical component unit 5, as a preferred embodiment of the present invention, as shown in FIGS. 15 and 16, on the inner surface side of the electrical component partition plate 52 on the side where the inverter board 611 or the like is mounted. It has a handle 510. The handle 510 may have a general shape composed of strips having screwed pieces 521,512 facing outward from each other at both ends of the U-shaped grip portion 511, and may be made of sheet metal or synthetic resin. There may be.

In FIG. 15, the handle 510 is arranged above the air intake port 59 at an empty portion on the upper right of the electrical component partition plate 52, diagonally upper right of the inverter board 611 in this example. The handle 510 may be mounted vertically or horizontally, but is preferably tilted by about 45 degrees. The tilting direction may be either upward-sloping (downward left) or downward-sloping (upward left).

According to this, as shown in FIG. 17, the handle 510 is held by one hand and the lower part of the heat sink 631 (see FIG. 10) is supported by the other hand so as to hold the heavy electrical component unit 5. 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, but the electrical component partition plate 52 to which the handle 510 is attached is as shown in FIG. It may be a flat plate having no bent portion.

Next, referring to FIG. 5, in the above 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 set as the rail surface 58, and the lower partition plate 24 A rail receiving portion 251 with respect to the rail surface 58 is formed at the upper end of the first partition surface 241 so that the electrical component unit 5 is moved along the rail receiving portion 251 and placed on the lower partition plate 24. However, since the width of the rail receiving portion 251 is narrow, there is a difficulty in stability during movement.

Therefore, as a configuration for solving this point, as shown in FIG. 18, a receiving plate 270 capable of stably moving the electrical component unit 5 to its fixed position is provided at the upper end of the lower partition plate 24.

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 to the heat exchanger mounting plate 183 parallel to the back surface of the housing 11. It has a second partition surface 242 and a third partition surface 243 that connects the first partition surface 241 and the second partition surface 242.

The receiving plate 270 has a first partition surface 241 and a third partition surface 243 and a second partition surface with a side extending linearly from a substantially central portion of the first partition surface 241 to a substantially central portion of the second partition surface 242 as a hypotenuse. It has a triangular shape that covers the upper end of 242, and a first flange 271 that is bent upward and erected is formed on its hypotenuse.

In the embodiment here, in the electrical component unit 5, as described with reference to FIG. 15, the electrical component partition plate 52 has a first electrical component partition plate 52a on the front end side and a second electrical component partition plate 52 on the rear end side. It is divided into 52b, and the second electrical component partition plate 52b is bent in a dogleg shape at a predetermined angle with respect to the first electrical component partition plate 52a, and the lower end of the second electrical component partition plate 52b is A second flange 52c that is bent and erected on the FR side of the blower chamber is provided.

According to this, as shown in FIG. 19A, the electrical component unit 5 is lifted, the rear end of the second electrical component partition plate 52b is placed on the receiving plate 270, and the direction along the arrow A is along the first flange 271. By moving to, 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, and is supported from the closed state substantially parallel to the service panel 13 to the outside of the housing 11 (FIG. 1). It can be opened up to, for example, about 90 ° on the front side of the paper.

With reference to FIG. 16 again, a predetermined electrical wiring W (in this example, a three-phase power line) is laid between the first electrical component unit 6 and the second electrical component unit 7. Since the drive current value of the compressor or the like increases as the air conditioning capacity is improved, a wiring having a large diameter is also used for the power supply line W. If the wiring becomes thick, it becomes difficult to route the wiring, and the opening and closing of the second electrical component unit 7 is also hindered.

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

With reference to FIG. 20, the wiring storage portion 75 is formed so as to project toward the service panel 13 in a substantially box-like shape. The wiring storage portion 75 may be formed integrally with the substrate fixing plate 71, or may be formed as a separate body and retrofitted to the substrate fixing plate 71 by screwing, welding, or the like.

Preferably, as shown in FIG. 16, the wiring hook 752 may be provided in the wiring storage portion 75, and the excess length of the power supply line W may be looped and passed through the wiring hook 752 a plurality of times to be held. In this example, the wiring hook 752 is an annular body, but a hook type hook can also be used.

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

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

Many parts for air conditioning control are mounted on both sides of the board fixing plate 71 of the second electrical component unit 7, and the heat generating parts contained therein are the front surface of the board fixing plate 71 (the surface on the service panel 13 side). When it is arranged on the) side, a part of the air taken into the electrical component unit 5 from the outside air intake port 141 (see FIG. 1) of the back panel 14 can easily flow to the front side of the substrate fixing plate 71. It is necessary to cool the heat generating parts more effectively.

As described above, the upper part of the electrical component partition plate 52 (second electrical component partition plate 52b) of the first electrical component unit 6 is a vent 532 that discharges the cooling air of the reactor 613 to the blower chamber FR side. Is formed.

With this vent 532 as the first vent, a second vent is provided above the board fixing plate 71 of the second electrical component unit 7 to improve the air passage on the front side of the board fixing plate 71. The second vent may be a simple opening made in the substrate fixing plate 71, but in this embodiment, the second vent 751 is provided at the bottom of the wiring storage portion 75.

As a result, as shown by an arrow B in FIG. 21, a heat dissipation path for improving the flow of cooling air from the front surface of the substrate fixing plate 71 through the second vent 751 to the first vent 532 is formed, and the substrate is fixed. The heat generating component provided on the front surface side of the plate 71 can be cooled more effectively.

Further, when incorporating the second electrical component unit 7 into the electrical component unit 5, the hinge piece 714 of the second electrical component unit 7 engages with the hinge slit 551 provided in the support column 55 of the first electrical component unit 6. However, at that time, the second vent 751 can be used as a handle for carrying the second electrical component unit 7.

By the way, in this embodiment, what is mounted on the third electrical component unit 8 arranged along the upper surface of the housing 11 is a rectifier circuit for preventing inrush current, and as shown in FIG. 22, the top thereof. An electrolytic capacitor 821 and a cement resistor 822 are mounted on the lower surface of the substrate 82. The third electrical component unit 8 corresponds to the specific electrical component unit according to claim 1.

The electrolytic capacitor 821 is an electric component having a large amount of heat generation energy that can ignite, and is filled with a flammable electrolytic solution. Although the cement resistor 822 has a small heat generation energy, it is one of the heat generating electric parts that can be a ignition source together with the electrolytic capacitor 821.

When the electrolytic capacitor 821 ignites, the electrolytic solution, which is a combustible material, scatters around. Further, when the cement resistor 822 ignites, the fire type and the burning slag may scatter, and the surrounding heat insulating material, sound absorbing material, etc. may fly and spread the fire. In addition, the mounted components may fall due to the combustion of the substrate.

Therefore, in the present embodiment, the barrier tray 9 is arranged below the third electrical component unit 8, and the leaked material falls or scatters around when the heat-generating electrical component (electrolytic capacitor 821 or cement resistor 822) ignites. I try not to.

A region is set in the barrier tray 9 according to the magnitude of the heat generation energy of the heat-generating electric component. Specifically, it includes a first region 9a corresponding to the electrolytic capacitor 821 having a large heat generation energy, and a second region 9b corresponding to the cement resistor 822 having a small heat generation energy.

The first region 9a requires a clearance of at least 25 mm (minimum distance between the first region 9a and the electrolytic capacitor 821) with the electrolytic capacitor 821 of the ignition source. Further, the second region 9b requires a clearance of at least 15 mm (minimum distance between the second region 9b and the cement resistor 822) with the cement resistor 822 of the ignition source. Note that these minimum distances are also the distances between the first region 9a or the second region 9b and the third electrical component unit (specific electrical component unit).

As described above, since there is a height difference between the first region 9a and the second region 9b, in this embodiment, an inclined surface 9c having a downward gradient is formed from the second region 9b to the first region 9a to ignite. Combustibles (electrolyte solution, fire type, slag, etc.) scattered from the source (electrolytic capacitor 821 and cement resistor 822) are collected in the first region 9a having a large clearance. According to this, the combustibles are collected at a position away from the ignition source having a large heat generation energy, and the combustion of the combustibles can be suppressed.

In the present invention, the barrier tray 9 includes an integrated barrier tray 910 shown in FIG. 23 and a split type barrier tray 930 shown in FIG. 25.

With reference to the perspective view of FIG. 23, the plan view of FIG. 24 (a), and the bottom view of FIG. 24 (b), the integrated barrier tray 910 covers the entire lower surface of the top substrate 82 of the third electrical component unit 8. It has an area to be obtained and is entirely made of a non-twisting synthetic resin.

A tongue-shaped screwed portion 911 to the substrate fixture 83 (see FIG. 14) of the third electrical component unit 8 is integrally formed at the front end portion (end portion on the service panel 13 side) 910a of the barrier tray 910. There is.

Further, at the rear end portion 910b of the barrier tray 910 (the end on the back side of the electrical component storage portion 50 and opposite to the front end portion 910a), a handle 510 for carrying the electrical component unit 510 (see FIGS. 15 to 17). An engaging portion 912 with respect to the above is provided. In this embodiment, the engaging portion 912 is formed in a U shape to be hooked on the handle 510.

In order to attach the barrier tray 910 to the third electrical component unit 8, the engaging portion 912 of the rear end portion 910b may be hooked on the handle 510, and the screwed portion 911 of the front end portion 910a may be screwed to the board fixture 83. ..

Further, in order to remove the barrier tray 910 from the third electrical component unit 8, it is only necessary to remove the screwed portion 911 from the board fixture 83 and the engaging portion 912 of the rear end portion 910b from the handle 510.

As shown in FIGS. 24A and 24B, the electrolytic capacitor 921 is particularly air-cooled at a predetermined portion other than directly under the heat-generating electrical component (electrolytic capacitor 821 and cement resistor 822) of the barrier tray 9 (910). A ventilation hole (ventilation portion) 913 for the purpose is provided.

In the case of the integrated barrier tray 910, it is difficult to attach it to the bottom surface side of the third electrical component unit 8 inside after assembling the electrical component unit 5 due to its size. Therefore, the third electrical component unit 8 is installed before assembly. Next, a modified example of the barrier tray (split type barrier tray 930) will be described with reference to FIGS. 25 to 28.

The split type barrier tray 930 also has a third electrical component for the electrical component unit 5 (see, for example, FIG. 20) assembled by the first electrical component unit 6, the second electrical component unit 7, and the third electrical component unit 8. The main tray 940 is arranged on the front side (service panel 13 side) of the electrical component storage unit 50 and is arranged on the back side (rear side) of the electrical component storage unit 50 so that it can be attached to the product unit 8. It is composed of two members of the sub tray 950 which is connected to the main tray 940.

The front end portion 940a of the main tray 940 is integrally formed with a tongue piece-shaped screwed portion 911 to the substrate fixture 83 of the third electrical component unit 8 as in the front end portion 910a of the integrated barrier tray 910. The rear end portion 950b of the sub tray 950 is provided with an engaging portion 912 with respect to the handle 510 for carrying the electrical component unit, similarly to the rear end portion 910b of the integrated barrier tray 910.

Of these, in particular, the sub tray 950 is selected to have an appropriate size according to the model of the outdoor unit, and is connected to the main tray 940. Therefore, a fitting means 960 is provided at the connecting portion between the main tray 940 and the sub tray 950 (between the rear end portion 940b of the main tray 940 and the front end portion 950a of the sub tray 950).

According to this example, the male member 961 of the fitting means 960 is provided on the rear end portion 940b side of the main tray 940, and the female member 962 of the fitting means 960 is provided on the front end portion 950a side of the sub tray 950. ing.

In the fitting means 960, the male member 961 and the female member 962 are fitted by sliding the sub tray 950 in the lateral direction (the direction orthogonal to the front-rear direction of the barrier tray 9) with respect to the main tray 940.

With reference to FIG. 27, a support plate 963 is projected from the rear end portion 940b of the main tray 940 along the direction along the front-rear direction of the barrier tray 9, and the male member 961 is a support plate 963. It is formed perpendicular to the plate surface.

According to this embodiment, the male member 961 is formed in a U-shape including a pair of left and right rib walls 961a and 961a in order to increase the structural strength and obtain a strong connection. ..

Further, in order to facilitate fitting to the female member 962, forward-tapered inclined surfaces 961b and 961b are formed at the upper ends of the rib walls 961a and 961a so as to have a downward slope toward the female member 962. On the other hand, the female member 962 is a hole into which the male member 961 fits.

As shown in FIGS. 25 and 26, the sub tray 950 is finally screwed to the main tray 940, but the male member 961 and the female member 962 are mainly screwed 972 if they are not properly fitted. Their shapes are defined so that they cannot be screwed into the female screw holes 971 provided in the tray 940.

With reference to FIGS. 26 and 28, the sub-tray 950 includes a polymer piece (overlap piece) 980 that slips into a portion of the bottom surface 940c of the main tray 940 when connected to the main tray 940 (when assembled).

According to this, even as the split type barrier tray 930 in which the barrier tray 9 is divided into the main tray 940 and the sub tray 950 and assembled, the fire protection structure against the ignition source can be maintained.

Here, a method of attaching the split type barrier tray 930 to the third electrical component unit 8 will be described with reference to FIGS. 29 to 31.

First, as shown in FIG. 29, the main tray 940 is attached to the front side of the service panel 13 side on the lower surface of the third electrical component unit 8. This mounting is performed by screwing the screwed portion 911 at the front end portion 940a of the main tray 940 to the board fixture 83 (see FIG. 13) of the third electrical component unit 8 as shown in FIG. 30 (a). Will be done.

Next, with reference to FIGS. 26 and 29, the sub tray 950 is pushed in from the side of the electrical component unit 5 along the front end portion 950a of the main tray 940 along the rear end portion 940b of the main tray 940, and the male of the fitting means 960. The member 961 and the female member 962 are fitted and connected to the main tray 940, and as shown in FIG. 30B, the engaging portion 912 at the rear end portion 950b of the sub tray 950 is used for carrying the electrical component unit. Hook on the handle 510.

Finally, as shown in FIG. 26, the set screw 972 is screwed into the female screw hole 971 provided in the main tray 940 to integrate the main tray 940 and the sub tray 950. FIG. 31 shows a split type barrier tray 930 attached to the third electrical component unit 8 in this way.

According to this split type barrier tray 930, it can be easily attached to the electrical component unit 5 after assembly. It is also possible to attach the main tray 940 to the bottom surface side of the top board 82 of the third electrical component unit 8 before assembling, and connect the sub tray 950 to the main tray 940 after assembling the electrical component unit 5.

Further, for example, when the barrier tray 9 is an obstacle for maintenance of electrical components, only the sub tray 950 can be removed, or both the main tray 940 and the sub tray 950 can be removed.

As described above, according to the present invention, by arranging the barrier tray 9 below the third electrical component unit (specific electrical component unit having an ignition source), the scattering of leaked matter due to ignition of the heat-generating electric component is prevented. can do. Further, since the barrier tray 9 can be divided into the main tray 940 and the sub tray 950 and assembled, the barrier tray 9 can be easily attached to the electrical component unit 5 after assembly.

1: Outdoor unit, 11: Housing, 12: Piping cover, 13: Service panel, 14: Back 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: Back partition plate, 264: Insert claw, 270: Receiving plate , 271: 1st flange,
30: Front panel 4: Refrigerant circuit parts, 40: Accumulator, 43: Refrigerant piping, 45: Piping housing, 46: 1st cable, 47: 2nd cable,
5: Electrical component unit, 50: Electrical component storage, 510: Handle, 52: Electrical component partition plate, 53: Mounting surface, 54: Fixed surface, 541: Corner, 55: Support, 551: Hinge slit, 56 : Corner fixing plate, 57: Stopper, 58: Rail surface, 581: Rail guide, 59: Air intake, 591: Vent,
6: 1st electrical component unit, 61: mounting base, 611: inverter board, 62: fan motor drive board, 621: 1st connector, 622: 2nd connector, 631: heat sink, 64: impermeable lid, 651: duct , 652: Wind guide cover,
7: Second electrical component unit, 71: Board fixing plate, 73: Opening, 74: Connector relay part, 741: Relay connector, 75: Wiring storage part,
8: Third electrical component unit, 81: Support frame, 82: Top board, 83: Board fixture, 84: Board fixing assembly, 85: Insulation sheet, 86: Gap 9: Barrier tray, 9a: First area, 9b : 2nd region, 9c: Inclined surface, 910: Integrated barrier tray, 911: Screwed part, 912: Engagement part, 913: Ventilation hole (ventilation part), 930: Split type barrier tray, 940: Main Tray, 950: Sub tray, 960: Fitting means MR: Machine room, FR: Blower room

Claims (3)

The inside of the housing is divided into a blower room and a machine room having an electrical component storage section by a partition plate, and the electrical component including a specific electrical component unit in which a heat-generating electrical component is mounted on a circuit board is contained in the electrical component storage section. In the outdoor unit of an air conditioner having a product unit
An outdoor unit of an air conditioner characterized in that a barrier tray for receiving falling objects from the heat-generating electrical components is arranged below the specified electrical component unit. The heat-generating electric component includes a strong heat-generating electric component having a large heat-generating energy and a weak heat-generating electric component having a small heat-generating energy, and the barrier tray corresponds to the strong heat-generating electric component. It has one region and a second region corresponding to the weakly heat-generating electrical component, and the distance between the first region and the specific electrical component unit is larger than the distance between the second region and the specific electrical component unit. The outdoor unit of the air conditioner according to claim 1, wherein an inclined surface for guiding the falling object is formed from the second region to the first region. The outdoor unit of the air conditioner according to claim 1 or 2, wherein a ventilation hole is provided in a predetermined portion of the barrier tray except directly under the heat-generating electric component.

Images