JP2002076666A - Chassis structure for electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a chassis structure for electronic equipment so as to reduce the size and weight of electronic equipment, to give a heat insulating function and a cooling function to the equipment, and to make the switching operation between the heat insulating function and cooling function simpler. SOLUTION: An electronic block or electronic circuit 1 is placed on a metallic tray 2. The tray 2 is heated with an electric heater 3. A temperature detecting circuit 4 controls the heater 3. The electronic block or electronic circuit 1 is surrounded by a heat transfer box 4 and the box 4 is covered with an insulated box 5. A heat sink 6S has such a structure that the effective heat radiating area of the plate 68 can be increased or decreased, is thermally coupled with the heat transfer box 4, and is in contact with the outside air through the wall of the insulated box 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved electronic block or electronic circuit constituting an electronic apparatus, which is cooled so as not to overheat even in extremely hot weather and is kept warm so as not to be overcooled even in extremely cold weather. The present invention relates to a chassis structure of an electronic device.

[0002]

2. Description of the Related Art FIG. 4 is an overall perspective view showing a part of an electronic device in a cutaway view. Electronic block or electronic circuit 1
Is housed in the case 10 and further installed in an outer box. FIG. 5 is a schematic diagram of the case cut and drawn on a vertical plane. Below the electronic block or electronic circuit 1,
An electric heat source 11 such as a large heater or a high-performance heater is provided. During cold weather, heat generated from the electric heat source 11 passes through various paths and in various modes (conduction and conduction).
While taking convection / radiation, it reaches the electronic block or electronic circuit 1 like the heating flow 8 and keeps it warm. However, a considerable portion of the generated heat is dissipated and lost like the heat radiation flow 9. During hot weather, the power supply to the heat source 11 is stopped. However, since the electronic block or the electronic circuit 1 itself also generates heat, some cooling means must be used together.

FIG. 6 is a schematic view showing a conventional electronic device chassis structure adapted to cope with extreme cold and hot weather. FIG. 6A is a reduced view of FIG. () Is a cross-sectional view of an electronic block or the like stored in a heat insulating box 5 for cold weather, and (C) is a cross-sectional view of an electronic block or the like stored in a heat transfer box 4 for hot weather. The insulation box 4
It is made of a heat-insulating material and has a built-in electric heater 3. Thereby, the electronic block or the electronic circuit 1 in the heat insulating box 4 is kept warm. The heat transfer box 4 is made of a good heat conductor such as a metal plate. Thereby, heat generated in the electronic block or the electronic circuit 1 is transmitted to the heat transfer box 4 mainly by conduction, and is radiated by convection and radiation. The cooling function works in this way. For example, when used in Japan, in the spring, the heat insulation box 5 is removed and stored, and the heat transfer box 4 is attached for use. In the fall, the heat transfer box 4 is removed and stored, and the heat insulating box 5 is attached for use.

[0004]

In the conventional chassis structure shown in FIG. 5, a part of the heat generated by the heat source 11 is used for heating the electronic block or the electronic circuit, and the other part is dissipated. For this reason, the capacity of the heat source 11 must be increased, so that the manufacturing cost is relatively high, the entire apparatus is large and heavy, and furthermore, the power consumption is large and the running cost is increased. In addition, in the apparatus shown in FIG. 5, effective cooling is not performed in extremely hot weather. According to the conventional example of FIG. 6, the heat of the electronic block or the electronic circuit 1 is maintained by using the heat insulating box 5 in winter, and the heat transfer box 4 is maintained in summer.
Can be used for cooling. However, in the conventional example of FIG. In the spring and autumn, the heat insulation box 5 and the heat transfer box 4 must be replaced. In summer, the removed heat-insulating box 5 must be stored, which is troublesome, and it cannot be said that there is no risk of loss. Also, in winter,
Since the removed heat transfer box 4 must be stored, it is troublesome, and there is no risk of loss. In addition, there is a problem that the manufacturing cost is high because the member for summer and the member for winter must be configured as described above. The present invention has been made in view of the above-mentioned circumstances, and has a cooling effect in summer and a warming effect in winter, and has a high thermal efficiency for warming, a low running cost, and a structure. The present invention seeks to provide a chassis structure that is simple and easy to handle.

[0005]

In order to achieve the above object, a chassis structure according to the present invention is provided in which an electronic block or an electronic circuit of an electronic device is mounted on a tray made of a material having high thermal conductivity. A temperature detection circuit, and an electric heat source controlled based on an output signal of the temperature detection circuit, the electronic block or the electronic block being disposed below the tray. And a heat transfer box surrounding the electric heat source, comprising a heat insulating box covering the outer peripheral surface of the heat transfer box, further thermally coupled to the heat transfer plate, the heat insulating box A "radiator plate capable of increasing and decreasing the radiation efficiency" penetrating through the substrate and contacting the atmosphere is provided.

[0006]

FIG. 1 shows an embodiment of the present invention. FIG. 1 (A) is a schematic cross-sectional front view, and FIG. 1 (B) is a cross-sectional side view. The electronic block or electronic circuit 1
It is placed and fixed on a metal tray 2 which is a good heat conductor. A temperature detection circuit (temperature sensor) 4 is provided below the metal tray 2.

The temperature detecting circuit 4 functions as a thermostat, and cuts off the power supply to the electric heater 3 when the temperature of the electronic block or the periphery of the electronic circuit 1 becomes higher than a predetermined temperature. The components described above with reference to FIG. 1 are housed in a metal heat transfer box 4 that is a good heat conductor. Further, the outer periphery of the heat transfer box 4 is covered with a heat insulating box 5. The radiator plate 6S is an expandable radiator plate as will be described later in detail with reference to FIG.
The heat sink drawn with S is in a contracted state. The heat radiating plate 6S is thermally connected to the heat transfer box 4 and is fixed with a thumb screw 7, and penetrates between the box-shaped portion of the heat insulating box 5 and the upper heat insulating plate 5a to touch the outside air. .

FIG. 2 is a schematic sectional front view shown for explaining the operation of the embodiment shown in FIG. Since the outer periphery of the heat transfer box 4 is covered with the heat insulating box 5, almost all of the heat generated by the electric heater 3 becomes the heating flow 8 and is summed with the heat generated by the electronic block or the electronic circuit 1 to be added to the electronic block or the electronic circuit. Insulate with circuit 1. As described above, since the electric heater 3 is wrapped in the heat insulating box 5, the heat efficiency is high, and the capacity of the electric heater 3 is small. For this reason, the manufacturing cost is low, the power consumption is low,
The entire manufacturing equipment is small and lightweight.

FIG. 3 is a schematic cross-sectional front view for explaining the operation of the embodiment shown in FIG. Since it is extremely hot, the temperature detection circuit 4 cuts off the power supply to the electric heater 3. The radiating plate 6S in the contracted state depicted in FIG. 2 (in extremely cold weather) is drawn by imaginary lines in FIG. 3 (in extremely hot weather) for reference. Figure 3
At the time of extreme heat, the thumb screw 7 is loosened, the heat sink is pulled out to the extended position 6E, and the thumb screw 7 is tightened and fixed. As a result, the amount of heat generated in the electronic block or the electronic circuit 1 is radiated into the atmosphere in various forms (conduction, convection, and radiation) as a heat radiation flow 9 to perform a cooling function. When carrying out the present invention, the heat radiating plate does not necessarily have to be a slide type as in the present embodiment. in short,
What is necessary is just to comprise so that an effective heat radiation area can be increased or decreased.

[0010]

According to the structure of the present invention, a cooling function is exhibited in summer and a heat retaining function is exhibited in winter, and the heat efficiency of the preserving action is high and power consumption is low. Moreover,
The handling is simple, and the switching operation between warming and cooling can be performed quickly and easily.

Further, since the heat retaining mechanism and the cooling mechanism are incorporated in a single chassis structure, they are smaller and lighter in weight than the overall function, the manufacturing cost is lower, and the operation for switching between heat retaining and cooling is performed. Since there are no parts to be removed and attached, there is no need to store the removed parts, and there is no risk of losing the stored parts.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of an electronic device provided with an embodiment of a chassis structure according to the present invention.

FIG. 2 is a schematic cross-sectional view for explaining an operation state of the chassis structure of the embodiment in a severe cold.

FIG. 3 is a schematic cross-sectional view for explaining an operation state of the embodiment in an extremely hot weather.

FIG. 4 is a perspective view of an example of the electronic apparatus, which is partially broken and drawn.

FIG. 5 is a schematic sectional view for explaining the operation of a conventional chassis structure.

FIG. 6 is a schematic diagram of a conventional chassis structure configured to replace and replace a heat insulating box for winter and a heat transfer box for summer.

[Explanation of symbols]

1. Electronic block or electronic circuit, 2. Metal tray, 3.
Electric heater, 4 ... temperature detection circuit (temperature sensor), 5 ... heat insulation box, 5a ... upper heat insulation plate, 6S ... heat radiation plate in contracted state, 6E ... heat radiation plate in expanded state, 7 ... thumb screw, 8 ... heating flow, 9 ... heat radiation flow, 10 ... case, 11 ... heat source.

Claims (1)

[Claims] 1. An electronic device comprising: an electronic block or an electronic circuit;
A temperature detection circuit and an electric heat source controlled based on an output signal of the temperature detection circuit are provided while being placed on a tray made of a material having high thermal conductivity and positioned below the tray. And a heat transfer box surrounding the electronic block or the electronic circuit and the electric heat source, and a heat insulating box covering an outer peripheral surface of the heat transfer box. A chassis structure for an electronic device, wherein a "radiator plate capable of increasing or decreasing the radiation efficiency" is provided, which is thermally coupled to the heat plate and penetrates through the heat insulating box to contact the atmosphere. .