JPH09287778A - Electrical component integrated board structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a temperature sensor to be quire easily replaced with another sensor. SOLUTION: This board structure is comprised of a heat sink 5 having thermal radiation fines 6, an inverter control element 7 directly attached to a heat sink 5 and generating heat during its operation, and a control circuit board 8 arranged a side of the inverter control element 7 opposite to the heat sink and having various operation control elements. In this case, a working hole 14 which passes through the control circuit board 8 is formed and at the same time a thermo-sensitive section 15a of a temperature sensor 15 for use in sensing a temperature of the heat sink 5 is fixed to a position corresponding to the working hole 14 in the heat sink 5. In the case that the temperature sensor shows an abnormal state, a replacement of the thermo-sensitive section 15a can be easily replaced through the working hole 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric component collecting board structure, and more particularly to a mounting structure of a temperature detector on the electric component collecting board.

[0002]

2. Description of the Related Art For example, in a casing of an outdoor unit for an air conditioner, a heat exchange chamber in which a heat exchanger and a fan are installed which does not interfere with water, and various electric parts which interfere with water if exposed to water. Are partitioned by a partition member that extends in the front-rear direction of the casing (see, for example, Japanese Utility Model Laid-Open No. 1-116331), and the electrical components are housed in a box called a switch box. It was stored.

By the way, in recent years, a technique of improving performance by frequency control of the operation of the compressor (in other words, inverter control) has been widely used, but in this case, high temperature heat is generated during operation. An inverter control element (for example, power transistor, diode, etc.) is required, and the inverter control element needs to be cooled.

Due to the above requirements, the inverter control element is directly attached to the heat sink having the heat radiation fins and arranged in the ventilation passage in the casing, while the control board having various operation control elements is provided on the front surface of the component storage chamber of the casing. It is conceivable to have a layout in which the two are separated, such as arranging in

However, when the layout is such that the inverter control element and the control board are separated from each other as described above, there is a problem that the cooling performance is deteriorated because the control board is separated from the ventilation passage.

Therefore, as shown in FIG. 3, in an outdoor unit for an air conditioner, a heat sink 5 having heat radiating fins 6 and a heat sink 5 are provided in a partition member 4 for partitioning the inside of the casing 1 into a heat exchange chamber 2 and a component storage chamber 3. By mounting the electrical equipment integrated board A including the inverter control element 7 directly attached to the heat sink 5 and the control board 8 arranged on the side opposite to the heat sink of the inverter control element 7, the apparatus is made compact and the cooling performance is improved. Attempts have been made to achieve this. Code 9
Is a fan, 10 is a heat exchanger, 11 is a compressor, 12 is an air inlet, and 13 is an air outlet.

By the way, in the electrical component integrated board A having the above-mentioned structure, a temperature detector is required to detect the temperature of the heat sink 5 and protect the inverter control element 7 from abnormal heating.

It is preferable that the temperature sensing portion (for example, the thermistor) of the temperature detector is attached to the heat sink in order to improve temperature detection. However, the heat sink is covered by the control board 8 as described above. Because
Conventionally, a mounting method has been adopted in which the lower side of the control board is dipped to be mounted on a heat sink.

[0009]

However, in the case of the temperature detector temperature sensing portion mounting structure as described above, since the temperature sensor temperature sensing portion mounting portion is covered by the control board, the temperature detector is abnormal. When trying to replace it when,
There was a problem that the control board could not be replaced unless the control board was removed.

The present invention has been made in view of the above points, and it is an object of the present invention to make it possible to replace a temperature detector very easily.

[0011]

In the basic constitution of the present invention, as a means for solving the above-mentioned problems, a heat sink 5 having a heat radiation fin 6, and an inverter control element which is directly attached to the heat sink 5 and generates heat during operation. 7 and
In an electrical component integrated board structure provided with a control board 8 arranged on the side opposite to the heat sink of the inverter control element 7 and having various operation control elements, a work hole 14 penetrating the control board 8 is formed, and A temperature sensing unit 15 of a temperature detector 15 for detecting the temperature of the heat sink 5 at a position corresponding to the work hole 14 in the heat sink 5.
If a is attached and the temperature sensor becomes abnormal,
The temperature sensing portion 15a can be easily replaced through the working hole 14.

In the basic configuration of the present invention, when the mounting position of the temperature detector temperature sensing portion 15a is set to the substantially central portion of the heat sink 5, the temperature can be accurately detected and the replacement work is difficult. It is preferable because it can be easily replaced.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

This electrical equipment integrated board A is also used in an outdoor unit for an air conditioner, for example, as described in the section of the prior art, and as shown in FIGS. 1 and 2.
A heat sink 5 having radiating fins 6, an inverter control element 7 that is directly attached to the heat sink 5 and generates heat during operation, and a control board 8 that is arranged on the side opposite to the heat sink of the inverter control element 7 and has various operation control elements.
It is comprised including. With this configuration, the electrical component integrated board A becomes extremely compact. Here, the heat sink 5 has a function of radiating and cooling the heat generated when the inverter control element 7 operates.

A work hole 14 of an appropriate size is formed through the central portion of the control board 8. The working hole 14 is formed at a position where wiring or the like is not printed on the control board 8 and does not correspond to the inverter control element 7.

The working hole 1 in the heat sink 5
The temperature sensing portion 15a of the temperature detector 15 for detecting the temperature of the heat sink 5 is provided at a position corresponding to 4 (that is, substantially in the center).
Are attached by screws 16. The temperature detector 1
Reference numeral 5 denotes a temperature sensing portion 15a having a thermistor, and the temperature sensing portion 1
Terminal portion 15b for attaching 5a to the heat sink 5
And a lead wire portion 15c extending from the temperature sensing portion 15a
And a contact portion 15d for attaching the lead wire portion 15c to the control board 8, the temperature sensing portion 1
5a is attached by fixing the terminal portion 15b with a screw 16 at a position corresponding to the work hole 14 in the heat sink 5. In addition,
The lead wire portion 15c is pulled out from the working hole 14,
The contact portion 15d is fixed to an appropriate place on the upper surface of the control board 8.

With the above construction, if the temperature detector 15 becomes abnormal, the temperature sensing portion 15a can be easily replaced by removing the screw 16 through the working hole 14.

Moreover, the temperature sensing portion 15a is provided with the heat sink 5
Since it is attached to the substantially central portion of the above, the temperature can be detected more accurately, and it is difficult to work from the side, but the replacement work can be easily performed from the work hole 14.

The invention of the present application is not limited to the one used in the outdoor unit for an air conditioner in the above-described embodiment, and it goes without saying that it can be applied to an electrical component integrating board in various devices.

[0020]

According to the present invention, the heat sink 5 having the radiation fins 6, the inverter control element 7 directly attached to the heat sink 5 and generating heat during operation, and the inverter control element 7 are arranged on the side opposite to the heat sink. In addition, in the electrical equipment integrated board structure including the control board 8 having various control elements for operation, the working hole 14 penetrating the control board 8 is formed, and at a position corresponding to the working hole 14 in the heat sink 5. , The heat sink 5
The temperature sensing part 15a of the temperature sensor 15 for detecting the temperature of the temperature sensing part 15a is attached so that if the temperature sensor becomes abnormal, the temperature sensing part 15a can be easily replaced through the working hole 14. Therefore, there is an excellent effect that the maintenance work becomes easy.

[Brief description of drawings]

FIG. 1 is a perspective view showing an electrical component integrated board structure according to an embodiment of the present invention.

FIG. 2 is a plan view showing an electrical component integrated board structure according to an embodiment of the present invention.

FIG. 3 is a plan view showing a general outdoor unit for an air conditioner, excluding a casing top plate.

[Explanation of symbols]

5 is a heat sink, 6 is a radiating fin, 7 is an inverter control element, 8 is a control board, 14 is a work hole, 15 is a temperature detector, 15a is a temperature sensing part, 16 is a screw, and A is a board for collecting electrical components.

Claims (2)

[Claims] 1. A heat sink (5) having a radiation fin (6), an inverter control element (7) directly attached to the heat sink (5) and generating heat during operation, and an anti-heat sink of the inverter control element (7). And a control board (8) arranged on the side of the control board (8), the work board having a control hole (14) and a working hole (14) penetrating the control board (8). An electrical equipment characterized in that a temperature sensing part (15a) of a temperature detector (15) for detecting the temperature of the heat sink (5) is attached to a position corresponding to the working hole (14) in the heat sink (5). Product aggregation board structure. 2. The electrical component integrated board structure according to claim 1, wherein the temperature detector temperature sensing portion (15a) is mounted at a substantially central portion of the heat sink (5).