JPH0974623A - Structure for mounting heat sink - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for mounting a heat sink which allows heat of a source of heat to be exhausted outside a board without applying the heat to an electronic apparatus, etc., in a control board which houses the source of heat and the electronic apparatus, etc., in it. SOLUTION: A control board consists of a chassis 5, a case, etc. Wiring apparatuses and control devices are installed on the chassis 5. A source of heat is installed in the control board. A heat sink 3 for dissipating heat from the source of heat outside the control board is installed outside the control board. Between the heat sink 3 and the control board, a space A is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator mounting structure, and more particularly to a radiator mounting structure in a control panel having a heat source such as an inverter.

[0002]

2. Description of the Related Art FIG. 5 shows a control board in which heat is dissipated in a conventional inverter by a heat sink. FIG. 5A shows the bottom surface and FIG. 5B shows the side surface. This control panel is, for example, a panel for controlling the speed of a pump with an inverter, and contains an inverter 1 serving as a heat source, control devices 6 and 7 such as various relays, and wiring devices.

A hole 8 for taking in power is provided in the control panel chassis 5.
Is provided, and the chassis 5 and the control panel case 4 form a box structure. Attach the heat sink 3 inside the control panel chassis 5, attach the inverter 1 to the heat sink 3,
The heat of the inverter is radiated into the atmosphere inside the control panel through the fins of the heat sink 3. Various electronic devices such as an earth leakage breaker 6, an auxiliary relay or a control device 7 are mounted inside the control panel.

[0004]

However, when the heat of the heat source in the control panel, for example, the heat of the inverter is released in the control panel, the heat is trapped in the control panel and the air holes 2 for radiating heat are formed in the control panel. It was necessary to open a lot around the control panel.
Since air enters and exits through the numerous air holes 2, dust and water contained in the air enter the control panel. Dust and moisture adhere to the equipment inside the control panel, especially to the power semiconductor elements and the circuit elements such as capacitors and resistors used therein, and accelerate the insulation deterioration of various parts themselves.

Also, when the dust and water adhere to between the patterns of the board on which various parts are mounted, and the humidity is high, the humidity is sucked by the adhered dust and the space between the wiring patterns of the boards. Is short-circuited, causing a malfunction of the electronic circuit.

FIG. 6 shows another conventional control panel. In order to avoid the above-mentioned problems caused by incorporating the heat sink for the inverter into the control panel, the heat source, for example, the heat sink 3 attached to the inverter 1 is devised outside the enclosure of the control panel. However, although the heat generated by the inverter is transmitted to the entire heat sink, if the control panel (chassis 5) and the heat sink 3 are in close contact,
Conversely, the heat transferred to the heat sink is again transferred to the inside of the control panel, causing the temperature inside the control panel to rise, exceeding the allowable operating temperature of electronic devices, etc., or constantly raising the temperature, which causes deterioration of electronic components. Also, there is a problem that the life is shortened.

The present invention has been made in view of the above circumstances, and in a control panel in which a heat source, an electronic device, etc. are built-in, heat can be discharged to the outside of the panel without giving the heat of the heat source to the electronic device, etc. An object is to provide a mounting structure for a container.

[0008]

In order to achieve the above-mentioned object, in the radiator mounting structure of the present invention, a control panel is composed of a chassis and a case, and wiring equipment and control equipment are mounted on the chassis. Are installed, and there is a heat source in the control panel,
A heat sink for releasing that heat source to the outside of the control panel
It is characterized in that it is attached to the outside of the control panel, and a gap is provided between the heat sink and the control panel.

Further, a part of the chassis of the control panel is bent and projected from the inside to the outside, and the back surface of the heat sink contacts the protruding portion to form a void.

According to the present invention having the above-described structure, since a suitable gap (gap) is provided between the heat sink and the control panel chassis, the back surface of the heat sink and the control panel chassis are provided. Since there is air, and air has a heat insulation effect,
The heat of the heat sink does not flow back into the control panel again. If the chassis and the heat sink are arranged so as to maintain an appropriate gap, even if the mounting bolts of the earth leakage breaker or the like project to the heat sink side, they can be mounted without hitting the heat sink.

By providing a bent protrusion on a part of the chassis and abutting the heat sink to form a gap, the heat sink can be directly attached to the chassis without the need for a separate spacer. For this reason, not only is it unnecessary to attach the spacer, but the spacer itself is not required, which is economical.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIGS. In the drawings, the same reference numerals indicate the same or corresponding parts.

1A and 1B show a control panel according to an embodiment of the present invention. The control board chassis 5 and the control board cover 4 constitute an enclosure of the control board, and the inverter 1, the earth leakage breaker 6, the auxiliary relay, the control device 7, etc. are built in the control board. The heat sink 3 is attached to the outside of the enclosure of the control panel, and a space A is provided between the heat sink 3 and the control panel chassis 5. An electric wire drawing hole 8 is formed in the bottom surface of the chassis 5. A heat generating portion 1 a accommodating the power element of the inverter 1 is fixed to the heat sink 3 on the heat sink 3. The heat sink 3 is attached to the chassis via a protrusion or a spacer as shown in the area surrounded by a circle B in FIG. Therefore, the heat sink 3 dissipates the heat generated in the inverter 1, and a gap is provided between the chassis 5 and the heat generating portion 1a, and the chassis 5 has the heat generating portion 1a.
Thermally insulated from.

FIG. 2 shows a mounting state of the heat sink 3 and the chassis 5 of the control panel shown in FIG. FIG. 2 shows a case in which the spacer 10 is inserted between the chassis 5 and the heat sink 3 and fixed by the bolt 9. The spacer 10 is, for example, a plastic piece, and is fixed between the chassis 5 and the water-cooled heat sink 3 with an adhesive material.

In FIG. 3, a spacer 12 is inserted into a bolt 9 so that the heat sink 3 maintains an appropriate gap in the chassis 5 of the control panel, and the spacer 12 is attached from the inside of the control panel with the bolt 9. A heat source, for example, a heat-generating portion 1a of the inverter 1 is attached to the heat sink 3, and heat from the inverter is transmitted to the heat sink so that the heat can be released to the outside of the control panel. In addition, when the chassis 5 and the heat sink 3 are kept in such an appropriate gap in this way, as shown in FIG. 3, when the mounting bolt 11 of the earth leakage breaker 6 projects to the heat sink 3 side. However, it can be attached without hitting the heat sink 3.

FIG. 4 shows a convex portion 1 on the chassis 5 of the control panel so that the heat sink 3 maintains an appropriate gap.
The chassis structure with 0 is shown. A part of the chassis 5 is provided with a portion projecting from the inside by bending, and the back surface of the heat sink 3 abuts on the projecting portion, so that a space A is provided between the chassis 5 and the control panel chassis. By using a protruding portion formed by bending a part of the chassis, the space A can be formed without the need to attach a special spacer. Further, the bending process can be easily performed as a part of the entire molding gap of the chassis by a press or the like. Due to the air gap A, the heat sink 3
The heat from the heat sink is not transferred to the chassis, so the heat from the heat sink does not flow back to the chassis.

[0017]

Due to the structure of the control panel in which an appropriate gap (gap) is provided between the heat sink and the control panel, air is present between the back surface of the heat sink and the chassis of the control panel. The heat of the heat sink does not flow back into the control panel again because the heat insulation function is in the air. If the chassis and the heat sink are kept at an appropriate gap, for example, even if the mounting bolt of the earth leakage breaker projects toward the heat sink, it can be mounted without hitting the heat sink.

Further, since the projecting portion of the chassis, which serves as the spacer, has a structure integral with the chassis, the mounting is the same as a general mounting, which is easy. Not only does the labor for mounting the spacer not be necessary, but the spacer itself is not required, which is economical.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a control panel according to a first embodiment of the present invention,
(A) is a view seen from the upper surface, and (B) is a view seen from the side.

FIG. 2 is an explanatory diagram showing an arrangement of a chassis and a heat sink, showing a state in which a spacer is inserted.

FIG. 3 is an explanatory diagram showing an arrangement of a chassis and a heat sink, showing a state in which a spacer is inserted into a bolt.

FIG. 4 is an explanatory diagram in which a bent protrusion is formed on the chassis.

5A and 5B are explanatory views of a conventional control panel with a built-in heat sink, in which FIG. 5A is a top view and FIG. 5B is a side view.

6A and 6B are explanatory views of a control panel to which a conventional heat sink is fixed, where FIG. 6A is a top view and FIG. 6B is a side view.

[Explanation of symbols]

 1 Inverter 3 Water Cooled Heat Sink 4 Cover 5 Chassis 6 Earth Leakage Breaker 7 Auxiliary Relay or Control Equipment 9, 11 Bolts 10, 12 Spacer 13 Projection A Space

Claims (2)

[Claims] 1. A control panel comprises a chassis, a case, etc., wiring equipments and control equipments are attached to the chassis, and there is a heat source inside the control panel, so that the heat source is released to the outside of the control panel. The heat sink mounting structure according to claim 1, wherein the heat sink is mounted outside the control panel, and a gap is provided between the heat sink and the control panel. 2. The radiator according to claim 1, wherein a part of the chassis of the control panel is bent to protrude from the inside to the outside, and the back surface of the heat sink contacts the protruding portion to form a gap. Mounting structure.