JPS6370086A - Electrical-part mounting structure of inverter refrigerator, etc. - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an electrical component mounting structure for an inverter refrigerator or the like.

[Conventional technology]

FIG. 3 shows a conventional electrical component mounting structure disclosed in, for example, Japanese Utility Model Publication No. 60-26390.

This mounting structure is for a refrigeration showcase.

In the figure, 11 is the outer wall of the refrigeration showcase, 12 is a component mounting plate formed with a plurality of steps, 13 is a door that opens and closes the opening 11a of the outer wall 11, 14 is a first electrical component, and 15 is a second electrical component. The electric component 16 is a heat insulating wall that partitions the inner box 17 and the machine room 18. The outer wall 11 is a wall plate attached to the front of the case body, which is composed of a heat insulating wall 16, left and right side walls disposed on both sides of the heat insulating wall 16, and a rear wall at the rear, and the lower part thereof is a slope surface that slopes backward. It has become. The opening 11a is formed in this inclined surface. The component mounting plate 12 is attached by fixing its upper and lower ends inside the upper and lower ends of the opening 11a with screws or the like, thereby forming a component storage section 19 with openings on both sides. At the upper part of the component mounting plate 12, there is a first
A second electrical component 15, such as an earth leakage breaker, which is used less frequently, is attached to the lower part.

In the above-mentioned refrigeration showcase, as described above, a component mounting plate 12 forming a component storage section 19 with openings on both sides is attached in front of the machine room 18 in which the compressor etc. are installed, and electrical components are attached to this. The structure makes it easy to operate frequently used electrical parts, and
By utilizing the heat radiation of the machine room 18, it is possible to prevent dew condensation on the electrical components.

[Problem that the invention seeks to solve]

However, in the conventional electrical component mounting structure, since there are openings on both sides of the component storage section 19, it is not possible to prevent cockroaches, rats, etc. from entering, and electrical wires, components, etc. can be hit by the head and cause short circuits. There was a risk of machine failure, ignition, or fire.

In addition, if there is an electrical component that switches at high speed, such as an inverter, electrical noise will leak from one part during the above period. To prevent this, an electromagnetic shielding plate is required, but if an electromagnetic shielding plate is installed, However, there was a problem in that it was not possible to provide an opening for heat radiation.

This invention was made to solve the above-mentioned problems, and it can prevent the noise generated by electrical parts, and also prevent electrical parts from being chewed by rats, cockroaches, etc.
To obtain an electrical component mounting structure for an inverter refrigerator, etc., which can prevent malfunctions or fires caused by adverse effects, and can also radiate heat generated by the electrical components.

(Means for Solving the Problems) '1 [Air component mounting structure] of the inverter refrigeration bIi according to the present invention separates electrical components into heat-generating components (components that are relatively resistant to heat) and non-heat-generating components (components that are relatively weak to heat). Each part is divided into two parts and each part is surrounded by an electromagnetic shield, and the heat generating part and the electromagnetic shield surrounding it are connected by a good thermal conductor.

(Function) The electromagnetic shield according to the present invention prevents noise emitted by electrical components, and also prevents the entry of rats and cockroaches.
Prevents internal electrical components, wires, etc. from being chewed up or exposed to bad snow, resulting in malfunctions or fires. The thermal conductor also guides the heat generated by the heat-generating components to the electromagnetic shield, allowing it to be dissipated from the shield.

(Example of the invention) An embodiment of the present invention will be described below with reference to FIG.

In the figure, 1 is the outer casing of the refrigerator, with the uppermost back surface slightly recessed, and 2.3 is a board, which is fixed to the casing 1 with screws or plastic posts 4. 5.6
are electrical components constituting the control circuit, the latter 5 is a non-heat-generating component, and the latter 6 is a heat-generating component such as a power transistor. (It is attached to the plate 3. 7 and 8 are attached to the outer casing 1 so as to surround the heat generating component 5 and the heat generating component 6.
The former 7 is the first metal casing,
The latter 8 is a second metal housing. 9 is the heat generating component 6 and the second
It is a flexible thermal conductor that is screwed and connected to the metal casing 8 of. This is, for example, made by knitting copper wire into a plate shape to give it flexibility. The board 2 and the board 3 are electrically connected by a connector cable 10,
A minimal hole through which this cable 10 passes is bored in both the first and second metal cylinders 7.8. The edges of this hole are made of elastic rubber bushings, sponges, etc.
It is firmly attached to the cable 10.

With this configuration, the board 2.3 is completely covered by both the first and second metal casings 7.8, so the non-heat generating component 5 and the heat generating component 6 are completely electromagnetically shielded!
This prevents the liver from leaking out and also eliminates malfunctions caused by external noise. Signals are transmitted and received between the heat generating component 6 and the substrate 3 via the connector cable 10. On the other hand, heat generated by heat generating components 6 such as power transistors is transmitted to the second metal casing 8 by a good thermal conductor 9, and is dissipated into the air from there. Therefore, the flX degree of the heat generating component 6 does not have to rise much even if it is in a sealed space. In addition, as mentioned above, the metal casing allows for an airtight structure, which prevents rats and cockroaches from entering, and prevents the electrical components and wires inside from being damaged or adversely affected, resulting in malfunctions and fires. can be prevented from occurring.

In the above embodiment, the heat generating component 6 and the second metal casing 8 on the outside thereof are connected by a flexible thermal conductor, or as shown in FIG.
The heat-generating component 6 and the board 3 may be connected to each other by a lead wire. For this configuration,
The heat generated from the heat generating component 6 is directly transmitted to the second metal casing 8 and is dissipated into the atmosphere from there, so that the heat dissipation effect is further increased. This mounting structure is used when the board 3 is relatively small, directly connects the heat generating component 6 and the board 3, and also allows the heat generating component 6 to be mounted on the second metal casing 8 without supporting the board 3 anywhere. This structure prevents problems in terms of strength.

〔Effect of the invention〕

As described above, according to the present invention, electrical components are divided into heat generating components and non-heat generating components, and these are separately surrounded and shielded by electromagnetic shielding bodies, and the heat generating components and the electromagnetic shielding bodies are separated from each other by a good thermal conductor. Since they are bonded together, it is possible to prevent the noise emitted by electrical components, and at the same time, it is possible to prevent electrical components from being chewed by rats or cockroaches, or being adversely affected by them, resulting in malfunctions or fires.Furthermore, it also prevents heat dissipation from heat-generating components. It becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a perspective view of another embodiment of the invention, and FIG. 3 is a sectional view showing a conventional electrical component mounting structure. In the figure, 1 is the outer casing of the refrigerator, 2 and 3 are the circuit boards, 5 is the non-heat generating component, 6 is the heating component, 7 is the first metal casing (electromagnetic shield), and 8 is the second metal casing ( (electromagnetic shield), 9 is a good thermal conductor. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] An electric appliance such as an inverter refrigerator, characterized in that electrical parts are divided into heat-generating parts and non-heat-generating parts, each of which is surrounded by an electromagnetic shield, and the heat-generating part and the electromagnetic shield surrounding it are connected by a good thermal conductor. Parts mounting structure.