JP2023014499A - air conditioner - Google Patents

Abstract

To provide an air conditioner enabling all substrates in an electric component box to be replaced from the front surface only by detaching only a service panel without removing a top plate.SOLUTION: An air conditioner includes an outdoor unit constituted by a casing comprising a top plate, a bottom plate, a front plate, a rear plate and a service panel, and an air blowing chamber and a machine chamber are disposed in the casing via a partition plate. The air conditioner also includes: a heat sink disposed at a position projecting toward the air blowing chamber side above the partition plate; and an electric component box in which an inverter substrate radiating heat by using the heat sink and a control circuit board are disposed. The electric component box includes a heat radiation duct for radiating heat generated by a control circuit, and the inverter substrate and the control circuit board are fixed in the electric component box by using fixation screws. All of the fixation screws are disposed at positions enabling detachment from the front surface side of an outdoor unit body. By providing the outdoor unit, all of the substrates can be replaced from the front surface only by detaching only the service panel.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to air conditioners.

Patent Literature 1 discloses an air conditioner that houses a plurality of substrates in an electrical box. In order to efficiently cool the heat generated by the electrical components on which the inverter board is mounted, this air conditioner has a configuration in which it is closely attached to the heat sink. The heat sink and the inverter board protrude to the side of the ventilation chamber and the inverter board, respectively, while straddling the partition plate that is attached to the inverter. When the board is to be replaced for service, the board is removed above the main body of the outdoor unit of the air conditioner.

The outdoor unit 1 of the air conditioner is a housing composed of parts such as a top plate 2, a bottom plate 3, a front plate 4, a rear plate 5, and a service panel 6. The interior of the outdoor unit is partitioned into a machine room 101 and a blower room 102 by the partition plate 7 placed upright and placed on the partition plate 7 and the electrical equipment box 9 arranged above the compressor 8. In the air conditioner, an inverter board 10 on which electric parts are mounted is fixed to a board fixing box 11 in the electric equipment box 9, and is provided for cooling the electric parts mounted on the inverter board 10. A radiator plate 12 is placed so as to protrude from the electrical box 9 toward the blower chamber 101, and a heat radiation duct 13 is provided above the radiator plate 12 to circulate the heat accumulated in the electrical box 9 to the outside. When servicing the inverter board 10, the main body 1 of the air conditioner is mounted with the radiator plate 12 in order to improve serviceability such as replacement work of the inverter board 10. The electric equipment box 9 and the board fixing box 11 fixing the inverter board 10 are separated from each other so that they can be taken out from above, and are fixed to the electric equipment box 9 by fixing screws 14 .

JP 2010-78203 A

The present disclosure provides an air conditioner that can be replaced from the front by removing only the service panel without removing the top panel when replacing all the boards in the electrical box.

The air conditioner according to the present disclosure has an outdoor unit composed of a box consisting of a top plate, a bottom plate, a front plate, a rear plate, and a service panel, and a fan and a fan motor are installed inside the box. A blower chamber and a machine room provided with refrigeration cycle parts such as a compressor are arranged, a partition plate is arranged to separate the blower chamber and the machine room, and the partition plate is positioned above the partition plate and protrudes toward the blower chamber side. and an electrical box in which an inverter board and a control circuit board are arranged. Further, the electrical box has a heat radiation duct for dissipating the heat generated by the control circuit. The inverter board and the control circuit board are fixed inside the electrical box with fixing screws, and the outdoor unit is arranged in a position where all the fixing screws can be removed from the front side of the outdoor unit main body.

In the air conditioner according to the present disclosure, all boards in the electrical box can be replaced from the front by simply removing the service panel without removing the top board. By arranging it further forward, serviceability can be improved, replacement work time can be shortened, and safety during replacement work can be ensured without removing the rear plate.

A perspective view of the internal structure of the outdoor unit of the air conditioner according to Embodiment 1. 1 is a perspective view of a control circuit board removal structure according to Embodiment 1. FIG. 1 is a perspective view of an inverter board removal structure according to Embodiment 1. FIG. Side view when the service panel is removed according to the second embodiment Perspective view of the rear surface of the outdoor unit of the air conditioner according to Embodiment 3 Detailed perspective view of the junction between the heat dissipation duct and the control circuit board Perspective view of an outdoor unit of a conventional air conditioner Machine room perspective view of conventional air conditioner Plan view of machine room of conventional air conditioner

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters or redundant descriptions of substantially the same configurations may be omitted.

It should be noted that the accompanying drawings and the following description are provided to allow those skilled in the art to fully understand the present disclosure and are not intended to limit the claimed subject matter thereby.

(Embodiment 1)
FIG. 1 is a perspective view of the internal structure of an outdoor unit of an air conditioner according to a first embodiment of the present invention. 2 is a perspective view of the structure for removing the control circuit board having the same internal structure, and FIG. 3 is a perspective view of the structure for removing the inverter board.

1, 2, and 3, a partition plate 7 erected from the bottom plate 2 to the top plate (not shown) of the outdoor unit 1 of the air conditioner and placed on the partition plate 7 to partition It is an air conditioner in which the inside of the outdoor unit is divided into a machine room 101 and a blower room 102 by a plate 7 and an electrical box 9 disposed above the compressor 8, and the electrical parts for control are contained in the electrical box 9. The mounted inverter board 10 is fixed to a board fixing box 11, and a radiator plate 12 provided for cooling the components mounted on the inverter board 10 extends from the electrical box 9 to the outside of the blower chamber side 102. It is placed so as to protrude, and has a heat radiating duct 12 above the heat radiating plate for circulating the heat accumulated inside the electrical equipment box 9 to the outside.
A power supply circuit board 15 mounted in front of the inverter board 10 so as to be positioned perpendicular to the inverter board 10 dissipates the heat generated by the electrical components mounted on the inverter board 10. The electric circuit board 15 is fixed to the rear plate 5 and the heat radiation duct 13 with a plurality of screws 16 from the front of the outdoor unit 1 .
Further, the inverter board 10 is fixed to the radiator plate 12 via the board fixing plate 11, and in the state of the inverter board finished product 301, the partition plate 7 is fixed to the right side of the outdoor unit 1 by a plurality of screws 17. It is configured to be fixed from the surface direction.

The operation and action of the outdoor unit of the air conditioner configured as described above will be described below.

A power supply circuit board 15 mounted perpendicularly to the inverter board 10 is provided with a heat radiation duct 13 for radiating the heat generated by the electrical components mounted on the inverter board 10. The inverter board 15 is fixed to the rear plate 5 and the heat radiation duct 13 with a plurality of screws 16 from the front side of the outdoor unit 1, and the inverter board 10 is fixed to the heat radiation plate 12 via the board fixing plate 11. The finished inverter board 301 is fixed to the partition plate 7 with a plurality of screws 17 from the right side of the outdoor unit 1, so that all board replacements in the power supply box can be performed without removing the top board. The replacement work can be done only from the front without removing it, improving serviceability and shortening the time required for replacement work.

(Embodiment 2)
FIG. 4 is a side view of the second embodiment of the present invention when the service panel is removed.

In FIG. 4, the service panel 6 is removed from the housing of the outdoor unit 1 composed of the top plate 2, the front plate 4, the rear plate 5, and the service panel 6 (not shown), and the power supply circuit board 15 is further removed. In a state in which the outdoor unit 1 is removed from the front side, the position of the fixing screw 17 of the inverter board finished product 301 is arranged at a detachable position on the front side of the right side surface of the rear plate 5. The inverter board can be removed without removing the plate 5, and the replacement work can be improved.

(Embodiment 3)
FIG. 5 shows a perspective view of the rear surface of the outdoor unit of the air conditioner according to the third embodiment of the present invention, and FIG. 6 shows a detailed perspective view of the junction between the heat radiation duct and the control circuit board.
5 and 6, the heat radiation duct 13 has a square hole 18, and a claw 20 is provided at a position where the square hole 18 formed in the heat radiation duct 13 can be fitted on the fixing plate 19 side of the power circuit board 15. This allows the control circuit board to be temporarily fixed when all the fixing screws are removed. When replacing the control circuit board, it is possible to remove the fixing screws while holding it with one hand. Since it is unnecessary, the workability is improved and the replacement work can be shortened.

1 Outdoor unit body 2 Top plate 3 Bottom plate 4 Front plate 5 Rear plate 6 Service panel 7 Partition plate 8 Compressor 9 Electrical box 10 Inverter board 11 Board fixing plate 12 Radiation plate 13 Radiation duct 14 Fixing screw 15 Power supply circuit board 16 Fixing screw 17 Fixing screw 18 Square hole 19 Fixing plate 20 Claw 101 Machine room 102 Blower room 301 Inverter board finished product

Claims (3)

It has an outdoor unit composed of a box consisting of a top plate, a bottom plate, a front plate, a rear plate, and a service panel, and inside the box is a blowing chamber with a fan and a fan motor, a compressor, etc. A machine room provided with refrigerating cycle parts, a partition plate separating the blower chamber and the machine room, arranged above the partition plate and protruding toward the blower chamber side It has a radiator plate, an electrical box in which an inverter board for dissipating heat from the radiator plate and a control circuit board are arranged, and the electrical box further has a heat radiation duct for releasing the heat generated by the control circuit. , the inverter board and the control circuit board are fixed inside the electrical box with fixing screws, and all of the fixing screws are arranged in a position where they can be removed from the front side of the outdoor unit main body. harmony machine. 2. The air conditioner according to claim 1, wherein a fixing screw of said inverter board is positioned so that it can be removed from the front side rather than the right side surface of said rear plate. 2. A heat radiating duct provided in said electric equipment box has a square hole, and a hook is provided on the power circuit board side for fitting into the square hole provided in said heat radiating duct. Alternatively, the air conditioner according to any one of claims 2 to 3.

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