JPH0886473A - Outdoor machine of air conditioner - Google Patents

Abstract

PURPOSE: To lessen components of an inverter control device, thereby to facilitate assembly and also to attain miniaturization. CONSTITUTION: An electric component box is provided in an outdoor machine of an air conditioner. In this electric component box, an inverter control device controlling an operating frequency of a compressor is stored. A power transistor module 10 constituting this inverter control device, a heat sink 11 and a printed wiring board 12 are fixed to one support fitting 16 and then stored in the electric component box. The support fitting 16 has a first fitting face 16a on which the power transistor module 10 is fitted, a second fitting face 16b on which the heat sink 11 is fitted and a third fitting face 16c on which the printed wiring board 12 is fitted. The heat sink 11 has holes 21 in which the heads of screws 17 fixing the power transistor module 10 are held. These holes 21 can be used for positioning on the occasion of fitting the heat sink 11 to the support fitting 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outdoor unit for an air conditioner, and more particularly to assembling an inverter control device housed in an electrical equipment box of the outdoor unit.

[0002]

2. Description of the Related Art When the inside of an outdoor unit of an air conditioner is viewed from above, it is divided into a heat exchange chamber 32 and a machine chamber 33 by a partition plate 31 as shown in FIG. An outdoor heat exchanger 34 and an outdoor blower (not shown) are arranged in the machine room 33, and a compressor 35 and others are arranged in the lower part of the machine room 33 and an electric equipment box 36 is arranged in the upper part. This electric equipment box 36 has a compressor
An inverter control device that adjusts the operating frequency of 35 is housed. The inverter control device has a power transistor module 37 having a shape as shown in FIG.
, A printed wiring board (main board) 39 on which a plurality of electronic components are mounted, and another printed wiring board (sub board) 40
And electrolytic capacitors 41, 42, 43 and the like. The power transistor module 37 is fixed to the heat sink 38 with a plurality of screws 44, and each terminal 45 of the power transistor module 37 is connected to the sub-board 40.
Sub board 40 is each terminal of power transistor module 37
It is supported by 45 and floats in the air, and is connected to the main board 39 by a plurality of lead wires 46. With such a configuration using the sub-board 40, an unreasonable force relationship does not occur between the main board 39 and each terminal 45 of the power transistor module 37.
To prevent damage.

[0003]

However, in the above-mentioned structure, the number of parts is large, the assembly is troublesome, and it is difficult to miniaturize the device itself. In order to save space and reduce costs, it is conceivable to eliminate the sub-board 40 and mount the power transistor module 37 on the main board 39. However, the main board 39 has many electronic components and is heavy. Therefore, it is impossible to float in the air like the lightweight sub-board 40. When the power transistor module 37 is mounted on the main board 39, the angle α formed by the power transistor module 37 and the main board 39 is not substantially the same as the angle β formed by the electrical component box 36 and the heat sink 38 as shown in FIG. must not. Because, as shown in FIG. 6, when the angles α and β are different, the power transistor module 37 and the heat sink 38 are
This is because the power transistor module 37 may move when it is fixed to, and an unreasonable force may be applied to the main board 39 via the terminal 45 to cause a solder crack.
Further, in order to carry out soldering while keeping the mounting angle α of the power transistor module 37 constant, a dedicated assembly jig must be prepared, and there is a problem that assembly work becomes troublesome. Therefore, it is an object of the present invention to provide an outdoor unit for an air conditioner in which the inverter control device can be easily assembled and the electric component box can be made smaller.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and divides the inside of a main body composed of a base and a box into a heat exchange chamber and a machine room by a partition plate, In an outdoor unit of an air conditioner in which an electric component box containing an inverter control device is provided on the machine room side, a printed wiring board, a power transistor module, and a heat sink that form the inverter control device are provided as a single support tool. , And each terminal of the power transistor module was directly connected to the printed wiring board.

[0005]

With the above structure, the printed wiring board, the power transistor module, and the heat sink are fixed to one support, so that each terminal of the power transistor module can be printed without using a sub-board or the like. Can be directly connected to the wiring board.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic diagram showing the configuration of an outdoor unit of an air conditioner, where 1 is a base, 2 is a box, and 3 is a base 1.
It is a partition plate that divides the inside of the main body consisting of the box body 2 into a heat exchange chamber 4 and a machine chamber 5. An outdoor heat exchanger 6 and an outdoor blower (propeller fan) 7 are arranged in the heat exchanger chamber 4, and a compressor 8 and an inverter controller for controlling the operation of the compressor 8 are provided in the machine chamber 5. An electric component box 9 is placed. FIG. 2 shows the inside of the electrical equipment box 9 and its peripheral portion from the top. The electrical equipment box 9 includes a power transistor module 10, a heat sink 11, a printed wiring board 12, and an electrolytic capacitor which constitute an inverter control device. 13,
14 and 15 are arranged, and one side of the heat sink 11 is projected into the heat exchange chamber 4.

By the way, a feature of the present invention is that the power transistor module 10, the heat sink 11, and the printed wiring board 12 are fixed to the support 16 as shown in FIG. That is what I did.
The support 16 has a first mounting surface 16a on which the power transistor module 10 is mounted, and both upper and lower ends of the first mounting surface 16a are elastically bent, and a predetermined step with respect to the first mounting surface 16a. A second mounting surface 16b provided with a step (substantially equal to the thickness of the main body of the power transistor module 10) to mount the heat sink 11, and one side of the second mounting surface 16b extend in a direction perpendicular to each other. There is a third mounting surface 16c that is taken out to mount the printed wiring board 12, and a screwing hole 16d is provided in each of them.

For example, the power transistor module 10, the heat sink 11, and the printed wiring board 12 are screwed to the support 16 in this order. The power transistor module 10 has holes 18 through which the screws 17 pass, and the heat sink 11 has screws 19. Through hole 20 and power transistor module 10 side screw 17
A hole 21 for accommodating the head portion of the power transistor module 10
A plurality of holes 25 corresponding to the respective terminals 24 are formed, and the printed wiring board 12 is attached to the support 16 at a stage when the terminals 24 are inserted into the holes 25. The hole 21 on the heat sink 11 side is used not only for accommodating the head of the screw 17 but also for positioning when the heat sink 11 is attached to the support 16. Also, the printed wiring board 12 is a support tool.
After the mounting to the 16 is completed, it is passed through a solder bath (not shown), and when the soldering is completed, it is housed in the electrical equipment box 9 and held in the state shown in FIG.

[0009]

According to the control device as described above, the three members of the printed wiring board, the power transistor module and the heat sink are held at predetermined positions by one supporting member, so that it is difficult to perform the operation between the parts. Since the quality is stable without applying any force, and the sub-board and the like are unnecessary, the assembly is easy, and the size of the apparatus itself can be reduced, which is advantageous in cost.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an outdoor unit of an air conditioner according to the present invention.

FIG. 2 is an enlarged top view of a main part of an outdoor unit showing an embodiment of the present invention.

FIG. 3 is a perspective view of a main assembly of an inverter control device showing an embodiment of the present invention.

FIG. 4 is a schematic configuration diagram of a main part of an outdoor unit showing a conventional example.

FIG. 5 is a perspective view of a main part of an inverter control device showing a conventional example.

FIG. 6 is an explanatory diagram related to the arrangement of components that form the inverter control device.

[Explanation of symbols]

 9 Electrical Equipment Box 10 Power Transistor Module 11 Heat Sink 12 Printed Wiring Board 13 Electrolytic Capacitor 14 Electrolytic Capacitor 15 Electrolytic Capacitor 16 Support Tool 16a First Mounting Surface 16b Second Mounting Surface 16c Third Mounting Surface 16d Hole 24 Terminal

Claims (4)

[Claims] 1. An air conditioner in which an interior of a main body composed of a base and a box is divided into a heat exchange chamber and a machine room by a partition plate, and an electric component box containing an inverter control device is provided on the machine room side. In the outdoor unit, the printed wiring board, the power transistor module, and the heat sink that constitute the inverter control device are fixed to one support, and each terminal of the power transistor module is directly connected to the printed wiring board. An outdoor unit for an air conditioner, which is characterized in that 2. The first fixture has a first mounting surface on which the power transistor module is mounted, and the upper and lower ends of the first mounting surface are elastically bent, and a predetermined mounting surface is provided with respect to the first mounting surface. A second mounting surface provided with a step and adapted to mount the heat sink, and a third mounting surface adapted to mount the printed wiring board by bending one side of the second mounting surface at a right angle. Claim 1 comprising
The outdoor unit of the air conditioner described. 3. The outdoor unit for an air conditioner according to claim 1, wherein the heat sink is provided with a recess or hole for accommodating a head portion of a mounting screw of the power transistor module. 4. The outdoor unit for an air conditioner according to claim 1, wherein the heat sink is projected into the heat exchange chamber.